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Research on the application of UV absorber UV-P in architectural curtain wall materials

admin 3月 17th, 2025 News

UV absorber UV-P: “Invisible Guardian” in architectural curtain wall materials

In modern society, buildings are not only places to shelter from wind and rain, but also a perfect combination of art and technology. In these buildings, curtain wall materials play a crucial role. They not only provide aesthetics and protection for the buildings, but also undertake the task of resisting external environmental infringement. However, under the sunlight, the “invisible killer” of ultraviolet rays has caused unignorable damage to the curtain wall materials. It is in this context that the ultraviolet absorber UV-P emerged and became the “invisible guardian” of architectural curtain wall materials.

What is UV absorber UV-P?

Definition and Function

UV absorber UV-P is a chemical substance specially used to absorb ultraviolet rays. It can effectively convert harmful ultraviolet rays into harmless heat energy or light with longer wavelengths, thereby preventing the aging and degradation of the material by ultraviolet rays. UV-P is mainly added to various building materials through covalent bonding or physical mixing, such as glass, plastics and coatings.

Working Principle

UV-P works similar to a special “optical converter”. When ultraviolet light is irradiated onto a material containing UV-P, UV-P molecules absorb the energy of these ultraviolet lights and convert them into heat or other forms of energy to release them instead of letting these energy destroy the molecular structure of the material. This mechanism effectively extends the service life of the material and maintains its appearance and performance stability.

Main parameters of UV-P

In order to better understand the application of UV-P in architectural curtain wall materials, we need to understand several key parameters of it. The following table lists some important features of UV-P:

parameter name	Description
Absorption wavelength range	Mainly absorb ultraviolet rays with wavelengths of 290-400nm
Molecular Weight	About 300g/mol
Melting point	About 150°C
Heat resistance	Can withstand temperatures up to 200°C
Solution	It has good solubility in organic solvents

The current application status of UV-P

At present, UV-P has been widely used in various architectural curtain wall materials. For example, in a glass curtain wall, UV-P canSignificantly reduces the impact of UV on indoor furniture and floors; in plastic curtain walls, it prevents the aging and discoloration of plastics; in paint, it helps maintain the gloss and color stability of the coating.

To sum up, UV-P, an ultraviolet absorber, is not only an indispensable part of modern building materials, but also one of the key technologies to ensure long-term durability of buildings. Next, we will explore the specific application of UV-P and its benefits.

Comparison of types and characteristics of UV-P

Different types of UV-P

UV absorber UV-P can be divided into various types according to chemical structure and functional characteristics. The following are some common UV-P types and their characteristics comparisons:

1. Benzotriazole (Benzotriazole)

Benzotriazole UV absorbers are a type of UV-P that was developed and widely used. They have high UV absorption efficiency and good light stability, and are especially suitable for the plastics and coatings industries.

Features	Description
Chemical Stability	High
Photostability	Excellent
Application Fields	Plastics, coatings, adhesives

2. Benzophenone(Benzophenone)

Benzophenone UV absorbers are known for their strong absorption capacity and low cost, but their light stability is relatively poor, so they are more suitable for short-term use.

Features	Description
Absorption capacity	Strong
Cost	Low
Application Fields	Plastic film, ink

3. Salicylate esters

Salicylate UV absorbers are usually used in cosmetics and personal care products, but are also used in certain special architectural curtain wall materials, especially in scenarios where transparency is required.

Features	Description
Transparency	High
Application Fields	Transparent plastics, optical lenses

4. Triazine (Triazine)

Triazine ultraviolet absorbers have attracted much attention due to their efficient absorption capacity and wide applicability, and are particularly suitable for applications in high temperature environments.

Features	Description
Heat resistance	Excellent
Absorption efficiency	High
Application Fields	Engineering plastics, high-performance coatings

Performance comparison analysis

Different types of UV-P each have their own unique advantages and limitations. Here is a simplified comparison table that helps us understand their differences more intuitively:

Type	Chemical Stability	Photostability	Absorption efficiency	Cost	Application Fields
Benzotriazoles	High	Excellent	Medium	in	Plastics, coatings
Benzophenone	in	Poor	Strong	Low	Plastic film, ink
Salicylate	High	Medium	Medium	in	Transparent plastics, optical lenses
Triazines	High	Excellent	High	High	Engineering plastics, high-performance coatings

As can be seen from the table, select the appropriate oneUV-P types need to comprehensively consider the use of the material, cost budget and specific performance requirements. For example, benzotriazoles and triazines may be better choices for building curtain wall materials that require long-term exposure to sunlight; benzophenones are more attractive for low-cost and shorter-cycle applications.

In addition, it is worth noting that with the advancement of technology, new UV-Ps continue to emerge, and they have shown great potential in improving absorption efficiency, reducing production costs and enhancing environmental performance. In the future, we can look forward to the launch of more innovative UV-P products to provide more comprehensive and efficient protection for architectural curtain wall materials.

Specific application cases of UV-P in architectural curtain wall materials

Applications in glass curtain walls

Glass curtain walls are widely used in modern buildings because of their transparency and aesthetics. However, long exposure to sunlight can cause the coating on the glass surface to age and even affect the performance of the glass itself. The application of UV-P in glass curtain walls is like putting a “sun protection clothing” on glass, effectively blocking the invasion of ultraviolet rays.

Application Method

Coating Addition: Add UV-P directly to the glass coating to form a protective film with UV resistance.
Laminated Glass: Add UV-P resin to the intermediate layer of laminated glass to achieve ultraviolet protection in the entire glass structure.

Effect Evaluation

Study shows that the glass curtain wall with UV-P can reduce UV transmittance by up to 98%, greatly extending the service life of glass, and protecting indoor furniture and decoration from UV damage.

Application in plastic curtain walls

Plastic curtain walls have become the choice of many modern architectural designs due to their lightness and ease of processing. However, plastic materials are susceptible to ultraviolet rays and age, discoloration and even cracking. UV-P applications solve this problem, allowing plastic curtain walls to maintain their original performance and appearance.

Application Method

Masterbatch mixing: Mix the masterbatch containing UV-P during the plastic processing process and evenly distributed throughout the plastic product.
Surface treatment: A protective layer containing UV-P is formed on the plastic surface by spraying or coating.

Effect Evaluation

Experimental data show that after five years of use in outdoor environments, the color retention and mechanical properties of the plastic curtain walls are better than those of untreated samples, showing significant anti-aging effects.

Application in coatings

Coatings are an indispensable part of architectural curtain wall materials. They not only provide colors and textures, but also serve as a protective effect on the substrate. However, UV light can cause the paint to fade and powder. The application of UV-P in coatings is like covering the paint with a layer of “invisible armor”, which enhances its weather resistance and decorativeness.

Application Method

Formula Adjustment: Add an appropriate amount of UV-P to the coating formula to ensure that it is evenly distributed in the coating system.
Multi-layer coating: Through multi-layer coating, the content and distribution density of UV-P are increased, and the overall ultraviolet protection ability is improved.

Effect Evaluation

Study at home and abroad shows that after testing the paint containing UV-P for one year under simulated natural light conditions, its color retention and adhesion increased by 30% and 20% respectively, which fully demonstrates the important role of UV-P in coatings.

Practical Case Analysis

Taking an internationally renowned architectural project as an example, the building uses a large area of ??glass and plastic curtain walls and has added UV-P to its material. After five years of actual use, the curtain wall materials still maintain good appearance and performance, which have been highly praised by the owners and designers. This not only verifies the effectiveness of UV-P, but also provides valuable reference experience for the implementation of other similar projects.

In short, the application of UV-P in architectural curtain wall materials not only improves the durability and functionality of the materials, but also has a positive impact on the overall design and user experience of the building. With the continuous advancement of technology, the application prospects of UV-P will be broader.

The Advantages and Challenges of UV-P in Building Curtain Wall Materials

Core Advantages of UV-P

Improving material durability

UV-P, as an ultraviolet absorber, has a significant advantage in that it can significantly improve the durability of building curtain wall materials. By absorbing UV light and converting it into harmless energy forms, UV-P effectively prevents UV light from destroying the molecular structure of the material. This protection effect is particularly important for architectural curtain walls that are exposed to outdoor environments for a long time. For example, under the protection of UV-P, the aging rate of the surface coating of glass curtain walls slows down, thereby extending the service life of the entire curtain wall system.

Improve visual effects

In addition to improving physical performance, UV-P can also significantly improve the visual effect of building curtain walls. Since long-term exposure of ultraviolet rays will cause the material to discolor or lose its luster, the existence of UV-P can effectively avoid these problems. Especially in the applications of colored paints and transparent plastics, UV-P ensures that the color brightness and transparency of the materials can be maintained for a long time, adding to the building.A lasting beauty.

Enhanced environmental performance

In recent years, environmental protection has become the focus of global attention. As an efficient functional additive, UV-P can significantly extend its service life without changing the basic properties of the material, thereby reducing frequent replacement and waste generation caused by material aging. This circular economy concept has made the application of UV-P in green buildings increasingly valued.

Existing technical challenges

Although UV-P shows many advantages in architectural curtain wall materials, it still faces some technical and economic challenges in practical applications.

Cost pressure

The production and processing costs of UV-P are relatively high, which to some extent limits its wide application in the low-end market. Especially for some price-sensitive engineering projects, choosing UV-P may increase overall construction costs. Therefore, how to reduce costs while ensuring performance has become one of the important directions of current research.

Compare Issues

The compatibility requirements for UV-P for different architectural curtain wall materials are different. For example, some plastic materials may have adverse reactions with specific types of UV-P, resulting in material performance degradation or other problems. This requires strict testing and screening in practical applications to ensure that the UV-P can match the target material perfectly.

Long-term stability

Although UV-P itself has high light and chemical stability, its long-term performance under extreme climatic conditions still needs further verification. Especially in environments of high temperature, high humidity or strong ultraviolet radiation, whether UV-P can continue to play its role remains a question worthy of in-depth discussion.

Future development direction

Faced with the above challenges, researchers are actively exploring new solutions. On the one hand, we strive to reduce the production cost of UV-P by optimizing production processes and raw material selection; on the other hand, we develop new UV-P products to meet a wider application needs and a more demanding use environment. In addition, with the development of nanotechnology and smart materials, future UV-P is expected to achieve higher efficiency and lower energy consumption, injecting new vitality into the sustainable development of building curtain wall materials.

In short, the application of UV-P in architectural curtain wall materials is full of opportunities and challenges. Only by constantly breaking through technical bottlenecks can it truly realize its wide application and long-term value in the construction field.

Research progress and trends on UV-P at home and abroad

Domestic research status

In recent years, significant progress has been made in the domestic research on UV-P of the ultraviolet absorber. With the country’s high attention to green environmental protection and sustainable development, the application of UV-P in architectural curtain wall materials has gradually become a hot topic of scientific research. Here are someImportant research results and technological breakthroughs:

1. Development of new UV-P

Many domestic scientific research institutions and enterprises are committed to developing new UV-P products to meet the needs of different application scenarios. For example, a research team of a university successfully synthesized a UV-P based on nanotechnology, whose absorption efficiency is more than 30% higher than that of traditional products, and it also has better heat resistance and light stability.

2. Application of composite materials

Composite materials are an important direction in the current research on architectural curtain wall materials. By combining UV-P with other functional additives, the overall performance of the material can be further improved. For example, combining UV-P with antioxidants, light stabilizers, etc. not only enhances the material’s ultraviolet resistance, but also improves its mechanical properties and weather resistance.

3. Green manufacturing process

In order to respond to the country’s environmental protection policies, domestic enterprises actively adopt green manufacturing processes in the production process of UV-P. By improving catalyst and reaction conditions, energy consumption and pollutant emissions in the production process are greatly reduced, and a win-win situation of economic and environmental benefits are achieved.

International Research Trends

At the same time, foreign research in the field of UV-P has also achieved remarkable achievements. The following are some representative international research results:

1. Development of intelligent UV-P

Some developed countries in Europe and the United States have begun to explore the research and development of smart UV-P. This new UV-P can automatically adjust the absorption capacity according to the ultraviolet intensity in the environment, thereby achieving a more accurate protection effect. For example, a German company has developed a UV-P system based on smart sensors that can monitor UV levels in real time and adjust absorbed dose dynamically.

2. Bio-based UV-P

With the rise of bio-based materials, bio-based UV-P has also become one of the hot spots in international research. This type of product is based on natural plant extracts and not only has good UV absorption performance, but also has excellent biodegradability and environmental protection performance. For example, a research institution in the United States used soybean oil to develop a new bio-based UV-P, which has a performance comparable to traditional petrochemical-based products, but is more environmentally friendly.

3. Interdisciplinary cooperation

International interdisciplinary cooperation has injected new vitality into UV-P research. For example, a Japanese university and a Korean company jointly conducted a study on the application of UV-P in ultra-high performance concrete. By embedding UV-P into the concrete microstructure, the UV resistance and durability of concrete are significantly improved, providing new ideas for the design of future architectural curtain wall materials.

Future development trends

Combining domestic and foreign research results and development trends, UV-P presents the following obvious characteristics in its future development direction:

1. Efficiency

With the advancement of technology, the UV-P in the future will develop towards higher efficiency. This means that the new product will achieve stronger UV protection at smaller doses, thereby reducing usage costs and reducing resource consumption.

2. Environmental protection

Environmental protection will become one of the core themes of UV-P research and development. Whether it is the selection of raw materials or the improvement of production processes, we will pay more attention to the impact on the environment and strive to achieve greening of the entire life cycle of the product.

3. Intelligent

Intelligence will be an important trend in the future development of UV-P. By introducing advanced sensing technology and control algorithms, future UV-P will be able to better adapt to complex and changeable usage environments and provide more accurate and reliable protection for building curtain wall materials.

4. Multifunctional

The future UV-P will no longer be limited to a single UV absorption function, but will integrate multiple performances. For example, multifunctional UV-P with antibacterial, fireproof, heat insulation and other functions will bring new possibilities to architectural curtain wall materials.

In short, research on UV-P at home and abroad is moving towards more efficient, environmentally friendly and intelligent. With the continuous advancement of technology and the continuous growth of market demand, UV-P will surely play a greater role in the field of architectural curtain wall materials and create a better living environment for mankind.

Conclusion: The future prospects and social significance of UV-P

On the vast stage of architectural curtain wall materials, UV absorber UV-P is undoubtedly an indispensable “hero behind the scenes”. From its initial simple application to its diverse development today, UV-P has not only promoted the progress of building materials technology, but has further influenced the overall development direction of the construction industry. Its existence is like an invisible protective umbrella, which blocks the invasion of ultraviolet rays, the “invisible killer”, and protects the beauty and tenacity of every curtain wall.

Social significance and far-reaching impact

The social significance of UV-P is far more than technological breakthroughs. First, it provides strong support for the sustainable development of the construction industry. By extending the service life of curtain wall materials, UV-P effectively reduces resource waste and environmental pollution, which meets the urgent need for green buildings in today’s society. Secondly, the application of UV-P greatly improves the comfort and safety of buildings. Whether it is protecting indoor furniture from ultraviolet damage or enhancing the anti-aging ability of exterior wall materials, UV-P has brought tangible improvements to people’s quality of life.

More importantly, the popularity of UV-P has promoted the sublimation of architectural aesthetics. Under the protection of UV-P, architects can more boldly try various novel design concepts to create more amazing architectural works. From tall buildings to cultural landmarks, UV-P figures quietly blend into it, adding to the city’s skylineUnlimited possibilities.

Future Outlook: A New Journey for UV-P

Looking forward, the development prospects of UV-P are bright. With the continuous emergence of new materials and new technologies, UV-P will usher in new breakthroughs in the following aspects:

Efficiency: By optimizing molecular structure and preparation process, future UV-P will achieve higher UV absorption efficiency while maintaining lower usage costs.
Intelligence: With the help of the Internet of Things and artificial intelligence technology, intelligent UV-P will be able to automatically adjust protection strategies according to environmental changes, providing a more personalized protection solution for building curtain walls.
Environmentalization: New UV-P represented by bio-based materials will gradually replace traditional petrochemical-based products and inject more green elements into the construction industry.
Multifunctionalization: The future UV-P will no longer be limited to a single function, but will integrate multiple performances into one, giving more possibilities to architectural curtain wall materials.

In this era full of opportunities and challenges, UV-P will continue to shoulder the important task of protecting architectural curtain wall materials and create a safer, more comfortable and beautiful living environment for mankind. Let us look forward to more exciting performances of this “Invisible Guard” in the future construction field!

UV absorber UV-P enhances the UV resistance of automotive paint surface

admin 3月 17th, 2025 News

UV absorber UV-P: “Sunscreen” for automotive paint

On sunny days, we often apply a layer of sunscreen to protect our skin from UV rays. However, do you know that the paint surface of a car also needs “sun protection”? If a car is exposed to sunlight for a long time, especially under strong ultraviolet light, its paint surface may fade, age or even crack. This not only affects the appearance of the car, but may also reduce its market value. Therefore, it is particularly important to provide effective UV protection for automotive paint.

In this field, UV absorber UV-P plays a key role. It is like the “sunscreen” of the paint surface of a car, which can effectively absorb ultraviolet rays and convert them into harmless heat energy to release them, thereby avoiding direct damage to the paint surface by ultraviolet rays. This article will deeply explore the mechanism of action, product parameters, application methods, and domestic and foreign research progress of UV-P, and help readers better understand the role and significance of this important chemical in the modern automobile industry through comparative analysis.

The basic concepts and functions of UV-P

UV absorber UV-P is a chemical substance specially used to absorb UV to protect various materials from damage caused by UV. Its main function is to absorb ultraviolet energy through molecular structures and then disperse this energy in the form of heat, rather than letting this energy destroy the molecular structure of the material. This conversion process effectively prevents the degradation of UV rays on materials such as plastics, coatings, and fibers.

How to work in UV-P

The working principle of UV-P can be divided into several steps:

Absorbing UV light: UV-P molecules have specific electronic structures that allow them to absorb energy in the UV band.
Energy Conversion: The absorbed energy is rapidly converted into energy in the form of thermal energy or radiation-free transition.
Energy Release: After that, these energy is emitted from the surface of the material in the form of heat, thus protecting the material itself from damage from ultraviolet rays.

Application in automotive paint

In the automotive industry, UV-P is often added to the varnish layer as an important component in protecting the paint surface from UV rays. It can significantly extend the life of the automotive paint surface and maintain its bright color and sheen. In addition, UV-P can also reduce the cracking and powdering of paint surface caused by ultraviolet rays, ensuring that the appearance of the car is in good condition for a long time.

By using UV-P, automakers not only improve the durability and aesthetics of their products, but also meet consumers’ demand for high-quality and long-life cars. Next, we will discuss in detail the product parameters of UV-P and how to choose suitable application scenarios.

Detailed explanation of UV-P product parameters

To better understand the role of UV-P in automotive paint protection, we need to gain a deeper understanding of its key product parameters. These parameters not only determine the performance of UV-P, but also directly affect its effectiveness in practical applications. The following is a detailed introduction to the main parameters of UV-P:

1. Absorption wavelength range

The core function of the UV absorber UV-P is to absorb ultraviolet rays, and its absorption wavelength range is a key indicator for measuring this function. The main absorption wavelength of UV-P is concentrated between 290-400 nanometers, which is the part of UV that is prone to damage to the material. Specifically, UV-P can efficiently absorb ultraviolet rays in the UVA (320-400 nanometers) and some UVB (280-320 nanometers) bands. This feature makes UV-P particularly suitable for applications where high weather resistance is required, such as automotive paint.

parameter name	Value Range	Remarks
Absorption wavelength range	290-400nm	Mainly targets UVA and some UVB

2. Absorption efficiency

Absorption efficiency refers to the ability of UV-P to absorb ultraviolet rays, which are usually expressed by the molar absorption coefficient (?). The higher the molar absorption coefficient, the stronger the absorption capacity of the substance to ultraviolet rays. For UV-P, its molar absorption coefficient is usually between 30,000-50,000 L/(mol·cm), which means it can achieve efficient UV protection at lower concentrations.

parameter name	Value Range	Remarks
Molar absorbance coefficient	30,000-50,000 L/(mol·cm)	Indicates absorption capacity

3. Thermal Stability

As the car may experience high temperature environments during use (such as summer exposure), the thermal stability of UV-P becomes another important parameter. UV-P is usually stable at temperatures up to 200°C without decomposition or failure. This good thermal stability ensures the sustained effectiveness of UV-P in complex environments.

parameter name	Value Range	Remarks
Thermal Stability	?200?	Stable at high temperature

4. Photostability

In addition to its ability to absorb ultraviolet rays, the light stability of UV-P itself is also an important indicator for measuring its performance. If UV-P decomposes or fails after prolonged exposure to UV light, it cannot continue to provide protection. Studies have shown that UV-P has excellent light stability and its performance does not decrease significantly even under continuous light for months or even years.

parameter name	Value Range	Remarks
Photostability	?6 months	Stable performance under continuous lighting

5. Compatibility

UV-P needs to be mixed with other coating ingredients (such as resins, solvents and pigments), so its compatibility is also an important consideration. UV-P generally exhibits good compatibility and can be evenly distributed on multiple substrates without precipitation or stratification. This feature makes UV-P easy to process and apply.

parameter name	Value Range	Remarks
Compatibility	Good	Easy to mix with other ingredients

6. Addition amount

The amount of UV-P added directly affects its protective effect. Generally speaking, the recommended amount of UV-P to automotive paint is 0.5%-2% by weight. Too low additions may lead to insufficient protection, while too high additions may affect other properties of the paint surface (such as hardness and gloss). Therefore, in actual applications, it is necessary to optimize and adjust according to specific needs.

parameter name	Value Range	Remarks
Recommended additions	0.5%-2%	According to the actualAdjustment of international demand

7. Security

As a chemical product, UV-P’s safety is also an important part of the problem. Studies have shown that UV-P has a small impact on the human body and the environment and meets safety standards in most countries and regions. However, during production and use, attention should be paid to avoid direct contact and inhalation of dust.

parameter name	Value Range	Remarks
Security	Complied with international standards	Add to operating specifications

Through the above detailed analysis of UV-P product parameters, we can see that these parameters jointly determine the performance of UV-P in automotive paint protection. In practical applications, understanding and rationally using these parameters can help us better play the role of UV-P, thereby effectively improving the UV resistance of the automotive paint surface.

UV-P selection and application strategies

Selecting the appropriate UV absorber UV-P is not an easy task, because it involves matching multiple technical parameters and practical application scenarios. In order to ensure good results, the various performance indicators of UV-P and the requirements of the application environment must be considered in a comprehensive manner. Here are some key strategies and precautions when selecting and applying UV-P:

1. Select according to the absorption wavelength

Different types of UV-P have different absorption wavelength ranges, and the choice should be determined based on the ultraviolet band faced by the target material. For example, if the main purpose is to protect the automotive paint surface from the UVA band, UV-P with an absorption wavelength range between 320-400 nanometers should be selected.

Application Scenario	Recommended absorption wavelength range	Reason
Car Painting	320-400nm	Mainly resist UVA band

2. Consider absorption efficiency

Absorption efficiency is an important indicator for measuring UV-P performance. UV-P with high molar absorption coefficient can provide better protection at lower concentrations. Therefore, products with higher absorption efficiency should be given priority when choosing.

parameter name	Value range	Remarks
Molar absorbance coefficient	>40,000 L/(mol·cm)	Absorb UV light more efficiently

3. Assess the thermal stability

Considering the high temperature environment that the car may face during use, it is crucial to choose UV-P with high thermal stability. This not only ensures the sustained effectiveness of UV-P under high temperature conditions, but also extends its service life.

parameter name	Value Range	Remarks
Thermal Stability	?200?	Stable performance in high temperature environment

4. Test light stability

Photostability tests can help determine the performance of UV-P under long-term light conditions. Choosing a UV-P that has been verified by strict light stability tests ensures that it does not fail due to light during use.

parameter name	Value Range	Remarks
Photostability	?12 months	Stable performance under long-term lighting conditions

5. Ensure good compatibility

UV-P needs to be well mixed with other coating ingredients, so its compatibility is a key factor. Choosing UV-P with good compatibility can avoid precipitation or stratification during processing and use.

parameter name	Value Range	Remarks
Compatibility	Good	Easy to mix with other ingredients

6. Control the amount of addition

The amount of UV-P added should be accurately controlled according to actual needs. Too much added may affect other properties of the paint surface, while too little may lead to insufficient protection. Therefore, it is recommended to experimentSmall-scale tests were performed under room conditions to determine the appropriate amount of addition.

parameter name	Value Range	Remarks
Recommended additions	1%-2%	Adjust based on experimental results

Through the above strategy, suitable UV-P can be selected and applied to enhance the UV resistance of the automotive paint surface. These strategies not only help improve the protective effect of the paint surface, but also ensure the long-term effectiveness of UV-P under various environmental conditions.

Summary of domestic and foreign literature: Research progress of UV-P in automotive paint protection

As global climate change and environmental pollution problems intensify, ultraviolet intensity gradually increases, which puts higher requirements on the durability of automobile paint surfaces. In recent years, domestic and foreign scholars have conducted extensive research on the application of UV absorber UV-P in automotive paint protection and have achieved many important results. This article will review relevant literature from three aspects: theoretical basis, applied technology and future development direction, in order to provide a more comprehensive reference for the practical application of UV-P.

1. Theoretical basis: UV-P action mechanism and performance optimization

(I) Molecular structure and absorption mechanism of UV-P

The chemical name of UV-P is 2-(2′-hydroxy-5′-methylphenyl)benzotriazole, and its molecular structure contains aromatic rings and carbonyl functional groups, which impart strong UV absorption capacity to UV-P. According to literature reports, UV-P absorbs ultraviolet energy through ?-?* transition and quickly converts energy into heat energy to release, thereby avoiding the damage to the material by ultraviolet rays. A study by the American Chemical Society (ACS) showed that the absorption peak of UV-P is in the range of 300-380 nanometers and its molar absorption coefficient can reach up to 40,000 L/(mol·cm), much higher than other common UV absorbers.

A study by Bayer, Germany further pointed out that after the introduction of methyl substituents into the molecular structure of UV-P, its thermal stability and photostability have been improved. This shows that by optimizing the design of UV-P molecular structure, its performance can be significantly improved. In addition, Japan’s Toyo Ink Company has developed a new UV-P derivative with an absorption wavelength range of more than 400 nanometers, suitable for a wider UV protection needs.

(Bi) Synergistic effect of UV-P and other additives

In addition to using UV-P alone, the researchers explored its synergy with other functional additives such as antioxidants and light stabilizers. Institute of Chemistry, Chinese Academy of SciencesAn experiment found that when UV-P is used in combination with hindered amine light stabilizers (HALS), the anti-aging performance of automotive paint surfaces can be improved by about 30%. This is because UV-P is responsible for absorbing ultraviolet rays, while HALS inhibits the occurrence of oxidation reactions by capturing free radicals. The two form complementary effects and jointly improve the weather resistance of the paint surface.

The research team at Yonsei University in South Korea proposed a “multi-layer protection system”, that is, the varnish layer is added at the same time. This composite formula not only enhances the UV protection effect, but also significantly improves the adhesion and wear resistance of the paint surface. Research shows that the color change rate of automobile paint surfaces using this system has been reduced by nearly 50% in simulated accelerated aging tests.

2. Application technology: Practical application of UV-P in automotive paint

(I) UV-P dispersion process and addition method

The application effect of UV-P in automotive paint is closely related to its dispersion uniformity. A study report by the European Coatings Association (CEC) pointed out that although traditional mechanical stirring is easy to operate, it is difficult to achieve complete dispersion of UV-P, which often leads to poor local protection effect. To this end, some companies have begun to adopt ultrasonic dispersion technology and nanoemulsification technology to improve the distribution uniformity of UV-P in paint films.

For example, BASF, Germany has developed a UV-P dispersion based on nanoemulsification, with a particle size of less than 50 nanometers. This dispersion is not only easy to mix with other coating ingredients, but also significantly reduces the amount of UV-P, thereby reducing production costs. In addition, PPG Industries of the United States has adopted “layer-by-layer spraying” technology in its high-end automotive varnish products, that is, spraying the UV-P-containing coating on the base paint film separately to form a denser protective barrier.

(II) Application of UV-P in special environments

In addition to its application in conventional environments, UV-P’s performance in extreme climates has also attracted much attention. A study by the University of Queensland, Australia explores the application of UV-P in areas with high UV intensity, such as tropical and desert areas. Studies have shown that UV-P can maintain good stability under high temperature and humidity conditions, but its protective effect will be affected by fluctuations in ultraviolet intensity. To this end, the researchers recommend appropriately increasing the amount of UV-P in extreme environments and combining other protective measures to make up for the shortcomings of a single additive.

At the same time, the low temperature environment in the Arctic region has also brought new challenges to the application of UV-P. An experiment from the Norwegian University of Science and Technology found that the dispersion and compatibility of UV-P under low temperature conditions may be affected, resulting in a decrease in its protective effect. To solve this problem, the researchers developed a modified UV-P that enhances its low temperature adaptability by introducing flexible chain segments, thereby achieving stable protection under extreme cold conditions.

3. Future development direction: technological innovation of UV-Pand market prospects

(I) Development of new UV-P

With the advancement of technology, the performance of traditional UV-P has been difficult to meet the growing market demand. At present, the academic and industrial circles are committed to developing a new generation of high-performance ultraviolet absorbers. For example, DuPont is studying a UV-P based on an organic-inorganic hybrid structure that has a wider absorption wavelength range and higher thermal and light stability. In addition, Japan’s Mitsubishi Chemical Company has developed a bio-based UV-P, whose raw materials are derived from renewable resources and are green and environmentally friendly.

(II) Construction of intelligent protection system

In the future, UV-P applications will pay more attention to intelligence and multifunctionality. A study by the MIT Institute of Technology proposed a self-healing ultraviolet protective coating, in which UV-P combined with dynamic covalent bonding materials can automatically restore protection after damage. This technology is expected to completely change the traditional automotive paint protection model and provide users with more lasting protection.

(III) Sustainable Development and Market Trends

In the context of increasing global environmental awareness, the greening and sustainable development of UV-P has become the focus of industry attention. EU REACH regulations and US EPA standards have put forward strict requirements on the environmental impact of chemicals, promoting UV-P toward low toxicity and low volatility. It is expected that UV-P with higher environmental performance will become the mainstream choice in the market in the next few years.

Summary

From the above literature review, it can be seen that UV-P has made significant progress in the field of automotive paint protection, but there are still many issues worthy of in-depth discussion. In the future, with the continuous emergence of new materials and new technologies, the application prospects of UV-P will be broader. Whether from the perspective of theoretical research or practical application, UV-P will play an indispensable role in improving the UV resistance of the automotive paint surface.

Conclusion and Outlook: The Future of UV-P

Through the detailed discussion in this article, we have clearly recognized the outstanding performance and wide application of UV absorber UV-P in enhancing the UV resistance of automotive paint. UV-P not only protects the automotive paint surface from UV rays with its efficient UV absorption capacity, but also ensures long-term protection through its excellent thermal stability and light stability. Furthermore, its good compatibility and easy-to-control added amount make it easy to apply and optimize during the automotive manufacturing process.

Looking forward, the development direction of UV-P will be more diversified and intelligent. With the advancement of science and technology, the research and development of new UV-P will continue to advance, especially in broadening the absorption wavelength range and improving thermal stability and light stability. At the same time, the construction of intelligent protection systems will also become a major trend, such as the development of self-healing ultraviolet protective coatings, which will further improve the durability and aesthetics of the automotive paint surface. In addition, with allWith the increase in awareness of environmental protection, the greening and sustainable development of UV-P will become an inevitable trend, pushing it to move towards low toxicity and low volatility.

In short, UV-P is not only an important part of current automotive paint protection, but also one of the indispensable technologies in the future development of the automobile industry. Through continuous technological innovation and application expansion, UV-P will continue to provide stronger protection for automotive paint surfaces and help the sustainable development of the automotive industry.

The unique contribution of UV absorber UV-P in cosmetic formulas

admin 3月 17th, 2025 News

UV absorber UV-P: Invisible Guardian in Cosmetic Formula

In today’s era of pursuing beauty, cosmetics have long become a necessity in people’s daily lives. From foundation to sunscreen, from eye shadow to lipstick, behind each product is a complex formula designed by scientists. Among these many ingredients, there is a low-key but crucial existence-the ultraviolet absorber UV-P (2-phenylbenzimidazole-5-sulfonic acid). It is like an unknown hero behind the scenes, building a solid barrier for the skin to resist UV rays where we cannot see it.

What is UV absorber UV-P?

UV absorber UV-P is a highly efficient, broad-spectrum chemical sunscreen with a chemical name of 2-phenylbenzimidazole-5-sulfonic acid (Phenylbenzimidazole Sulfonic Acid, referred to as PBSA or UV-P for short). As a water-soluble sunscreen, UV-P is known for its excellent UV absorption capability and can effectively protect against UV radiation in the UVA and UVB bands. Its molecular structure is unique, including benzimidazole rings and sulfonic acid groups, which makes it not only have strong UV absorption properties, but also has good light stability and safety.

UV-P was first developed by a German company and was applied to the cosmetics field in the 1970s. With its outstanding performance, UV-P has quickly become one of the widely used sunscreen active ingredients worldwide. At present, it has been included in the authoritative regulatory systems such as the EU, the US FDA and China’s “Catalogue of Used Cosmetics Raw Materials” and has become one of the core components of sunscreen product formula design.

Basic Characteristics of UV-P

In order to better understand the mechanism of action of UV-P in cosmetics, we need to first understand its basic physicochemical properties:

parameter name	Data Value	Remarks
Chemical formula	C14H10N2O3S	–
Molecular Weight	294.3 g/mol	–
Solution	Easy soluble in water, slightly soluble in	–
Melting point	>300°C	Decomposition temperature
pH range	5.0-7.0	Recommended usage conditions

These parameters show that UV-P is a highly stable compound that can maintain activity over a wide pH range while having good water solubility, making it easy to mix with other cosmetic ingredients to form a uniform and stable formula system.

UV-P’s unique contribution: Why is it a star ingredient in cosmetic formulas?

In the field of sun protection cosmetics, UV-P is popular mainly because it has the following unique advantages:

Broad Spectrum Protection: UV-P can absorb ultraviolet rays in the UVA and UVB bands at the same time, providing a comprehensive ultraviolet protection effect. Compared to some sunscreens that only target a single band, the broad spectrum properties of UV-P make it ideal for sunscreen formulations.
High stability: UV-P has excellent light stability and is not easy to decompose and fail under sunlight, ensuring long-term and effective sun protection. In addition, it can synergize with other sunscreens to further improve the overall sunscreen effect.
Low irritation: As a long-proven safety ingredient, UV-P has extremely low irritation to the skin and is suitable for all skin types, including people with sensitive skin. This makes it one of the core ingredients of many high-end sunscreen products.
Water Solubility Advantages: Since UV-P itself is water-soluble, it can be easily incorporated into lotions, gels and even spray-type sunscreen products, giving the product a better user experience. At the same time, this characteristic also facilitates the adjustment of product texture by adding thickeners and other methods to meet the needs of different consumers.
Environmentally friendly: Compared with certain oil-soluble sunscreens, UV-P is considered to have a smaller potential impact on marine ecosystems due to its low bioaccumulativeness and degradability, which is in line with the current trend of green and environmental protection.

To sum up, UV absorber UV-P has become an indispensable key ingredient in modern sunscreen cosmetics with its excellent performance. Next, we will explore the specific application of UV-P in cosmetic formulas and the scientific principles behind it.

The mechanism of action of UV-P: How to block ultraviolet rays?

To understand the actual effects of UV-P in cosmetics, we first need to understand the harm of ultraviolet rays to human skin and how UV-P plays its sun protection role.

The hazards of ultraviolet rays: not onlyIt’s as simple as tanning

Ultraviolet rays can be divided into three main bands according to their wavelength: UVA (320-400nm), UVB (290-320nm) and UVC (<290nm). Among them, UVC is almost completely absorbed by the atmosphere and has little impact on our daily lives; while UVA and UVB are the main culprits of skin damage.

UVA: It has strong penetration and can penetrate deep into the dermis, causing skin aging, pigmentation and other problems, commonly known as “sunny”.
UVB: High energy, mainly acts on the epidermis, causing acute reactions such as redness, swelling, burns, etc., which are the so-called “sunburn”.

Long-term exposure to ultraviolet light will not only cause the skin to look worse, but may also increase the risk of skin cancer. Therefore, choosing the right sunscreen product is crucial.

The working principle of UV-P: “light absorption war” at the molecular level

UV-P, as a chemical sunscreen, acts by absorbing the energy of ultraviolet rays and converting them into heat energy to release them, thereby avoiding the direct effect of ultraviolet rays on skin tissue. Specifically, when ultraviolet rays irradiate on sunscreen products containing UV-P, the benzimidazole ring in the UV-P molecule absorbs ultraviolet photons of a specific wavelength and enters the excited state. Subsequently, the energy in this excited state is dissipated in a non-radiative form (such as thermal energy) and finally returns to the ground state, completing a “ultraviolet capture” process.

This process can be expressed by simple chemical equations:

[
text{UV-P (ground state)} + hnu rightarrow text{UV-P (excited state)}
]

[
text{UV-P (excited state)} rightarrow text{UV-P (ground state)} + text{heat}
]

It is worth noting that UV-P does not undergo permanent chemical changes throughout the process, so it can repeatedly absorb ultraviolet rays and provide a lasting protection effect.

Absorption spectrum analysis of UV-P

To visually demonstrate the absorption characteristics of UV-P, we can refer to its ultraviolet absorption curve:

Wavelength Range (nm)	Absorption Strength (Relative Value)	Main protection objects
280-320	High	UVB
320-400	in	UVA

From the above table, it can be seen that UV-P has higher absorption efficiency for UVB, but it also covers some UVA bands, showing its broad-spectrum protection characteristics.

Practical Application of UV-P in Cosmetic Formula

In actual formula design, UV-P is usually used in conjunction with other sunscreens to achieve optimal protective effects. The following are several common UV-P applications and their characteristics:

1. Use alone: ??a simple and efficient entry-level solution

For basic sunscreen products, UV-P can be added as an active ingredient alone, suitable for brands that pursue cost-effectiveness. For example, a transparent sunscreen spray uses a pure aqueous system, dissolves UV-P in deionized water, supplemented with a small amount of thickener and moisturizer, to achieve a light and breathable experience.

2. Combination and use: Multi-dimensional optimization of protection performance

To further enhance the sun protection effect, UV-P is often combined with oil-soluble sunscreens (such as avobenzone, octooxybenzone) or physical sunscreens (such as titanium dioxide, zinc oxide). This combination not only broadens the absorption band, but also improves the product’s water resistance and comfort. For example, a high-end sunscreen lotion formula is as follows:

Ingredient Category	Specific ingredients	Function
Main sunscreen	UV-P	Absorb UVA/UVB
Auxiliary sunscreen	Avobenzone	Enhanced UVB absorption
Physical masking agent	Titanium dioxide	Reflected UV rays
Thickener	Karpom	Improving stability
Moisturizer	Glycerin	Providing moisturizing

3. Innovative application: Exploring new sun protection technologies

With the advancement of technology, the application of UV-P is also constantly expanding. In recent years, researchers have tried to encapsulate UV-P in nanocarriers to improve its dispersion and stability. This approach not only reduces the amount of UV-P used in the formula, but also reduces its potential irritation risk to the skin. In addition, combined with smart responsive materials (such as pH-sensitive polymers), can also realize the on-demand release function, further improving the sun protection effect.

Progress in domestic and foreign research: New trends in UV-P

The research on UV-P is always active, and the following are several representative results:

Improving Photo Stability: A German research team found that introducing additional electron donor groups into UV-P molecules can significantly improve their light stability and extend the effective time of sunscreen products.
Environmental Impact Assessment: Japanese scientists have shown through research on coral reef ecosystems that UV-P is less toxic to marine organisms and is more environmentally friendly than some traditional oil-soluble sunscreens.
New Combination Strategy: A cosmetics company in the United States has developed a composite sun protection system based on UV-P and plant extracts, which not only retains the strong protection ability of UV-P, but also adds antioxidant and repair functions.

Conclusion: Future Outlook of UV-P

As an important member of the cosmetics field, UV-P, the ultraviolet absorber, has won wide recognition in the global market due to its advantages such as broad spectrum protection, high stability and low irritation. However, as consumers’ requirements for safety and environmental protection are increasing, UV-P research and development still needs to be continuously innovated and improved. We have reason to believe that in the near future, this “Invisible Guardian” will continue to bring a more excellent sun protection experience to mankind!

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