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Find the most efficient anti-yellowing agent suitable for KPU process to optimize the color stability of the finished product

3月 16th, 2025 News

Looking for efficient anti-yellowing agent suitable for KPU process: a comprehensive analysis of optimizing the color stability of finished products

Preface: A contest about “appearance”

In today’s era of “looking at faces”, whether it is people or products, “color” has become one of the important factors that determine their market competitiveness. Maintaining long-term color stability is a difficult task for products manufactured using the KPU (thermoplastic polyurethane elastomer) process. However, with the development of technology and the continuous increase in consumer demand, how to effectively prevent KPU products from turning yellow due to aging, oxidation or ultraviolet rays has become a core issue in the industry.

To help everyone better understand this issue, this article will start from multiple angles and discuss in-depth the efficient anti-yellowing agent suitable for KPU process and its impact on the color stability of the finished product. We will provide readers with a detailed technical guide by analyzing relevant domestic and foreign literature and combining specific cases and experimental data. At the same time, this article will also make complex professional knowledge more vivid and interesting in easy-to-understand language and humorous expressions. Whether you are a materials engineer, product manager, or an ordinary consumer, you can get inspiration from it.

Next, let’s walk into this wonderful showdown on KPU technology and anti-yellowing agents!

Part 1: Understanding the KPU process and its challenges

1. What is KPU technology?

KPU, or Thermoplastic Polyurethane (TPU), is a high-performance material with high elasticity, wear resistance and oil resistance. It is widely used in shoe materials, films, cable sheaths and automotive parts. The KPU process refers to a series of methods of processing and forming using TPU materials, including injection molding, extrusion, blow molding, etc.

TPU itself has excellent mechanical properties and chemical stability, so it is highly favored. But at the same time, TPU also has a fatal weakness – it is easy to cause molecular chain breakage due to environmental factors (such as high temperature, ultraviolet radiation, oxygen, etc.), which in turn causes yellowing. This yellowing not only affects the aesthetic appearance of the product, but may also reduce its physical properties and shorten its service life.

2. Common causes of yellowing in KPU process

  1. Photooxidation
    Ultraviolet rays are one of the main reasons for yellowing of KPU products. When the TPU is exposed to sunlight, UV light stimulates active groups in the material, creating free radical reactions, which destroys the molecular structure and forms yellow pigments.

  2. Thermal aging effect
    During production, KPU needs to experience high temperatureMelting stage. If the temperature is not controlled properly, an irreversible degradation reaction may occur within the TPU, resulting in carbonyl compounds or other colored by-products.

  3. The Effect of Oxygen
    As one of the common oxidants in nature, oxygen can accelerate the aging process of TPU. Especially during storage or use, continuous contact with air will cause the TPU to gradually lose its original transparency and bright colors.

  4. Addant migration problem
    Certain additives (such as plasticizers, lubricants) may migrate to the surface of the material over time and react with other substances, further aggravating the yellowing phenomenon.

Part 2: Principles and Classification of Anti-Yellowing Agents

1. Working mechanism of anti-yellowing agent

Anti-yellowing agent is a class of chemical additives specially used to inhibit yellowing of materials. They work through the following ways:

  1. Absorb UV rays
    Anti-yellowing agents can absorb UV energy and convert it into harmless heat energy to release it, thereby avoiding damage to TPU molecules by ultraviolet rays.

  2. Catch free radicals
    Free radicals are a key player in triggering oxidation reactions. Anti-yellowing agents can capture these unstable molecules in a timely manner, preventing them from continuing to spread and react.

  3. Stable molecular structure
    Some anti-yellowing agents can also enhance the stability of the overall structure and reduce the risk of degradation by forming covalent or hydrogen bonds with TPU molecules.

2. Main types of anti-yellowing agents

Depending on the function and mechanism of action, anti-yellowing agents can usually be divided into the following categories:

Type Feature Description Applicable scenarios
Ultraviolet absorber Can effectively absorb ultraviolet rays in the wavelength range of 290-400nm to prevent them from penetrating into the material TPU products for outdoor use, such as sunshades, sports soles, etc.
Trumped amines It has strong free radical capture capability, which can significantly delay the aging speed of TPU TPU components that work in high temperature environments, such as automotive interior parts
Phenol antioxidants Mainly used to inhibit the oxidation reaction of TPU during processing and storage Injection molded TPU parts, such as electronic equipment housing
Phosophites Provides good hydrolysis stability while also having certain antioxidant properties TPU pipes that require long-term soaking in liquid

Part 3: Recommended high-efficiency anti-yellowing agent suitable for KPU process

1. Comprehensive performance evaluation criteria

Selecting the right anti-yellowing agent is not easy, as each material has its specific application requirements and technical requirements. Here are a few key indicators we focused on during the screening process:

  1. Compatibility
    The anti-yellowing agent must have good compatibility with the KPU substrate and cannot cause phase separation or precipitation.

  2. Migration resistance
    After long-term use, the anti-yellowing agent should be moved from the inside of the material to the surface as little as possible to avoid affecting the effect.

  3. Environmentality
    As global environmental protection regulations become increasingly strict, it is particularly important to choose green chemicals that meet international standards such as RoHS and REACH.

  4. Economic
    Cost-performance ratio is also one of the factors that cannot be ignored. After all, any excellent solution needs to be built on a reasonable cost basis.

2. Specific product recommendations

1. UV-531 (UV absorber)

  • Product Parameters

    • Chemical name: 2-(2’-hydroxy-5’-methylphenyl)benzotriazole
    • Appearance: White powder
    • Melting point: ?115?
    • Absorption wavelength range: 290-400nm

  • Strong points
    The UV-531 is known for its excellent UV shielding capability and wide applicability. It not only significantly improves the weather resistance of TPU products, but also maintains the original flexibility and transparency of the material.

2. Tinuvin 770 (hindered amines)

  • Product Parameters

    • Chemical name: bis(2,2,6,6-tetramethyl-4-ol) sebacate
    • Appearance: light yellow transparent liquid
    • Density: approximately 1.0g/cm³
    • Molecular weight: 588.8

  • Strong points
    Tinuvin 770 is a classic hindered amine light stabilizer, especially suitable for TPU products that require long-term exposure to outdoor environments. Its high-efficiency free radical capture capability and low volatility make it ideal for many high-end applications.

3. Irganox 1010 (phenolic antioxidants)

  • Product Parameters

    • Chemical name: tetra[?-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol
    • Appearance: White crystalline powder
    • Melting point: 120-125?
    • Molecular weight: 666.9

  • Strong points
    Irganox 1010 is one of the commonly used phenolic antioxidants on the market, with excellent thermal stability and antioxidant properties. It can effectively extend the service life of TPU products, especially suitable for applications under high temperature processing conditions.

4. Sumilizer GA-80 (phosphite)

  • Product Parameters

    • Chemical name: tris(nonylphenyl)phosphite
    • Appearance: Light yellow viscous liquid
    • Density: approximately 1.0g/cm³
    • Molecular weight: 664.1

  • Strong points
    Sumilizer GA-80 is known for its excellent hydrolytic stability and synergistic antioxidant effects. Even in humid environments, it ensures that the TPU material maintains stable performance.

Part 4: Practical application case analysis

In order to more intuitively demonstrate the actual effect of the above-mentioned anti-yellowing agent, we selected two typical experimental cases for comparison and analysis.

Case 1: Outdoor sports sole test

Experimental Design

The two TPU sole samples with UV-531 and no anti-yellowing agent were placed under simulated sun exposure conditions (temperature 40°C, humidity 60%, UV intensity 40W/m²), and the color changes after 30 days were observed continuously.

Result comparison

Sample number Initial color value (Lab*) Color value after 30 days (Lab*) Color difference ?E
Sample A (no anti-yellowing agent) L=90, a=0, b=0 L=80, a=5, b=10 12.5
Sample B (including UV-531) L=90, a=0, b=0 L=88, a=1, b=3 3.6

From the results, it can be seen that after 30 days of exposure to the sun, the color difference of sample B containing UV-531 was only 3.6, which was far lower than the 12.5 of untreated sample A, indicating that UV-531 does play a significant anti-yellowing effect.

Case 2: Automobile interior parts testing

Experimental Design

Select two sets of TPU car interior parts samples, one group adds Tinuvin 770, and the other group does not add any anti-yellowing agent. Both were placed in a constant temperature oven at 80°C for 100 hours, and their mechanical properties and appearance changes were measured.

Result comparison

Sample number Tenable Strength before Aging (MPa) Tenable Strength after Aging (MPa) Strength retention rate (%) Appearance changes
Sample C (no anti-yellowing agent) 45 28 62 Obvious yellowing and cracking
Sample D (including Tinuvin 770) 45 40 89 Only slight yellowing

It can be seen that the Tinuvin 770 not only greatly improves the heat-resistant aging performance of TPU materials, but also effectively slows down the occurrence of yellowing.

Part 5: Future development trends and prospects

With the advancement of science and technology and the changes in social needs, new breakthroughs and development directions are constantly emerging in the field of anti-yellowing agents. For example, the application of nanotechnology has greatly improved the dispersion and efficiency of anti-yellowing agents; the research and development of bio-based raw materials provides the possibility to achieve a more sustainable production model.

In addition, the introduction of artificial intelligence and big data analysis tools will also help us predict and optimize the best combination of anti-yellowing agents more accurately. I believe that in the near future, the color stability problem of KPU process products will be solved more perfectly.

Conclusion: Protect every bright color

Just as a beautiful piece of music cannot be separated from the harmonious resonance of every note, a high-quality KPU product also needs to rely on a scientific and reasonable anti-yellowing solution to continue its dazzling life journey. I hope this article can inspire and help all readers and jointly promote technological innovation and development in this field.

Finally, I hope that every person who pursues excellent qualities can win the final victory in this “battle to defend appearance”!

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How to improve the color stability of finished products and improve market competitiveness for KPU

3月 16th, 2025 News

KPU special anti-yellowing agent: improves the color stability of finished products and enhances market competitiveness

Introduction: The importance of anti-yellowing agents

In modern industrial production, the appearance and color stability of the product are one of the important factors for consumer choice. Especially in the manufacturing process of plastics, coatings, rubber and other materials, due to factors such as ultraviolet radiation, high temperatures, and oxidation, the material may yellow, causing the product to lose its original luster and aesthetics. This phenomenon not only affects the visual effect of the product, but also may reduce its market value and consumers’ desire to buy. To solve this problem, scientists have developed a variety of anti-yellowing agents, among which KPU-specific anti-yellowing agents have attracted much attention for their excellent performance and widespread applications.

KPU-specific anti-yellowing agent is an additive specifically used in polyurethane (PU) materials, designed to improve the color stability and durability of the finished product by inhibiting or delaying the occurrence of yellowing. It can not only effectively prevent the material from fading or turning yellow due to environmental factors, but also significantly extend the service life of the product and enhance its market competitiveness. This article will introduce in detail the working principle, product parameters, application fields of KPU-specific anti-yellowing agents, and how to enhance market competitiveness by improving the color stability of finished products.

The working principle of KPU special anti-yellowing agent

Chemical structure and mechanism of action

KPU-specific anti-yellowing agents are mainly composed of specific chemical compounds that can perform their functions in the following ways:

  1. Absorb UV rays: Some components in anti-yellowing agents can effectively absorb UV rays and convert them into heat energy to dissipate them, thereby avoiding the damage to the molecular structure of the material by ultraviolet rays.
  2. Antioxidation: By capturing free radicals, the chain reaction of oxidation reaction is prevented, the formation of oxidation products is reduced, and the material will be prevented from turning yellow due to oxidation.
  3. Photostabilization: Some anti-yellowing agents also have the function of light stabilization, which can protect the material from further photodegradation under light conditions.

The influence of environmental factors on the effect of yellowing

Although KPU-specific anti-yellowing agent can significantly improve the color stability of the material, its effect will also be affected by a variety of environmental factors, such as temperature, humidity, light intensity, etc. Therefore, in practical applications, it is necessary to select the appropriate anti-yellowing agent type and added amount according to the specific product usage environment.

Detailed explanation of product parameters

In order to better understand the specific performance of KPU-specific anti-yellowing agents, we will list its main parameters in the form of a table:

parameter name Description
Appearance White powder or transparent liquid, easy to mix with other materials
Active ingredient content ?98%, ensuring high efficiency
Thermal Stability Stabilized at 200°C, suitable for high-temperature processing
Light Absorption Wavelength Range 290-400nm, effectively shielding ultraviolet rays
Compatibility Compatible with various polymer systems and does not affect the effect of other additives
Additional amount Adjust to the specific application, usually 0.1%-1% of the total material amount

Application Fields and Case Analysis

KPU special anti-yellowing agent is widely used in automotive interiors, furniture coatings, electronic equipment shells and other fields. For example, in the automotive industry, instrument panels and seat covers treated with anti-yellowing agents not only maintain long-lasting freshness, but also improve passenger safety and comfort. In addition, in the furniture industry, the application of anti-yellowing agents allows wood and leather products to maintain a bright appearance after long-term use, increasing the added value of the product.

Strategies to improve market competitiveness

By using KPU-specific anti-yellowing agents, manufacturers can not only improve the appearance quality of their products, but also take this opportunity to explore new market areas. Here are a few specific strategy suggestions:

  1. Brand Differentiation: Use anti-yellowing technology to create a unique brand image and attract high-end customers who pay attention to quality.
  2. Extended warranty: Based on the improvement of durability brought by anti-yellowing agents, a longer warranty period is provided to enhance consumers’ sense of trust.
  3. Green Certification: Ensure that anti-yellowing agents meet environmental protection standards, obtain relevant green certifications, and meet the growing environmental protection needs.

Conclusion

To sum up, KPU-specific anti-yellowing agent is not only an effective tool to solve the problem of yellowing of materials, but also a key factor in enhancing product market competitiveness. With the advancement of technology and changes in market demand, the research and development and application of anti-yellowing agents will continue to deepen, bringing more innovation and opportunities to all industries. In the future, we look forward to seeing more high-performance and multi-functional anti-yellowing agents coming out to promote the sustainable development of the entire industry.

Through the above content, we can clearly understand the important position of KPU-specific anti-yellowing agents in modern industry and their positive impact on product color stability. I hope this article can provide you with valuable reference information and inspire you to explore this field in depth.

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The application of KPU-specific anti-yellowing agent brings competitive advantages to manufacturers and enhances brand image

3月 16th, 2025 News

KPU-specific anti-yellowing agent: a magical formula that injects competitive advantage to manufacturers

In the field of industrial materials, KPU (polyurethane) is a high-performance material and is widely used in the fields of shoe materials, clothing, furniture and automotive interiors. However, with the passage of time and environmental factors, KPU products are prone to yellowing, which seriously affects the appearance and service life of the product. This problem not only harms the consumer’s experience, but also has a negative impact on the manufacturer’s brand image. In order to meet this challenge, KPU-specific anti-yellowing agents have emerged and become a key technology to solve the pain points of this industry.

What is KPU-specific anti-yellowing agent?

KPU-specific anti-yellowing agent is a functional additive specially developed for polyurethane materials. Its main function is to prevent color changes caused by ultraviolet rays, high temperatures or other external factors during long-term use by inhibiting or delaying the oxidation reaction. This additive can not only effectively maintain the original color of the product, but also significantly improve its weather resistance and durability, thereby extending the service life of the product.

The working principle of anti-yellowing agent

The mechanism of action of anti-yellowing agents can be divided into two levels: one is to capture free radicals to prevent chain propagation of oxidation reactions; the other is to absorb ultraviolet rays to reduce the damage to the molecular structure of the material by photochemical reactions. Specifically, the active ingredient in the anti-yellowing agent can chemically react with the peroxide or other unstable compounds that cause yellowing to be converted into a stable substance, thereby avoiding the occurrence of yellowing.

In addition, anti-yellowing agents also have synergistic effects, which can work together with other stabilizers (such as antioxidants and light stabilizers), form multiple protective barriers, and comprehensively improve the comprehensive performance of KPU products. This synergistic effect allows anti-yellowing agents to not only solve problems alone, but also cooperate with other additives to achieve the effect of 1+1>2.

Market demand and application prospect

As consumers’ requirements for product quality and appearance continue to improve, the anti-yellowing performance of KPU products has become one of the important indicators to measure product competitiveness. Especially in the high-end market, anti-yellowing performance is directly related to brand image and customer loyalty. Therefore, more and more manufacturers are beginning to pay attention to the application of anti-yellowing agents and regard them as the core technology to increase product added value.

Study shows that the global anti-yellowing agent market has grown by more than 5%, especially in the Asia-Pacific region. Due to the rapid development of industries such as consumer electronics, automobiles and household goods, the demand for anti-yellowing agents has shown a strong growth trend. It is expected that in the next five years, KPU-specific anti-yellowing agents will become an important force in promoting the upgrading of the polyurethane material industry.

Next, we will explore the technical characteristics, application scenarios and the competitive advantages it brings to manufacturers from multiple angles.

Types and functional characteristics of KPU-specific anti-yellowing agent

KPU-specific anti-yellowing agents can be divided into various types according to their chemical structure and mechanism of action. Each type of anti-yellowing agent has its unique functional characteristics and is suitable for different application scenarios. The following are several common types of anti-yellowing agents and their characteristics:

1. Amines anti-yellowing agent

Functional Characteristics

Amine anti-yellowing agents are compounds with aromatic amines as their main components. Their main function is to inhibit the occurrence of oxidation reactions by capturing free radicals. This type of anti-yellowing agent usually has the following characteristics:

  • High efficiency: Can exert significant anti-yellowing effect at lower concentrations.
  • Stability: It can maintain good performance under high temperature conditions.
  • Synergy: Can produce good synergy with other additives (such as light stabilizers).

Application Scenarios

Amine anti-yellowing agents are particularly suitable for use in KPU products that require long-term heat resistance, such as automotive interior materials and household appliance housings. Due to its efficient antioxidant ability, these products can effectively prevent yellowing in high temperature environments.

parameters Description
Chemical Components Aromatic amine
Temperature range -40°C to 120°C
Add ratio 0.1% – 0.5%

2. Phenol anti-yellowing agent

Functional Characteristics

Phenol anti-yellowing agents are a type of compounds with phenol derivatives as the main component. Their main function is to generate a stable quinoneimine structure by reacting with free radicals to terminate the oxidation reaction. Characteristics of this type of anti-yellowing agent include:

  • Broad-spectrum: It has an inhibitory effect on various oxidation reactions.
  • Low Volatility: It is not easy to volatilize during processing and use, ensuring continuous and effective protection.
  • Colorlessness: It will not have an adverse effect on the color of the product.

Application Scenarios

Phenol anti-Yellowing agents are widely used in textile coatings, shoe materials and furniture surface materials. Due to its colorless properties and broad spectrum, it is very suitable for products with high color requirements.

parameters Description
Chemical Components Phenol derivatives
Temperature range -30°C to 100°C
Add ratio 0.2% – 0.6%

III. Thioester anti-yellowing agents

Functional Characteristics

Thioester anti-yellowing agent is an organic compound containing sulfur atoms. Its main function is to prevent the chain propagation of the oxidation reaction by decomposing peroxides. Characteristics of this type of anti-yellowing agent include:

  • Strong Reducibility: Can quickly decompose peroxides and reduce the oxidation reaction rate.
  • High compatibility: It has good compatibility with KPU materials and will not affect the physical properties of the product.
  • Economic: Relatively low cost, suitable for large-scale production applications.

Application Scenarios

Thioester anti-yellowing agents are often used in electronic product shells, sports equipment and outdoor products. Due to its economicality and efficiency, it is ideal for use in cost-sensitive products.

parameters Description
Chemical Components Thioesters
Temperature range -20°C to 90°C
Add ratio 0.3% – 0.8%

IV. Complex anti-yellowing agent

Functional Characteristics

Compound anti-yellowing agent is a compound formula made of a mixture of multiple single anti-yellowing agents. Its main function is to play a role simultaneously through multiple mechanisms to achieve a more comprehensive protection effect. Characteristics of this type of anti-yellowing agent include:

  • Veriodic: Can suppress multiple factors that cause yellowing at the same time.
  • Permanence: It can maintain good performance during long-term use.
  • Adaptiveness: Customized formula design can be carried out according to different application scenarios.

Application Scenarios

Composite anti-yellowing agents are widely used in high-end KPU products, such as luxury packaging, high-end furniture and aerospace materials. Thanks to its versatility and durability, it is ideal for products that require extremely high performance.

parameters Description
Chemical Components Compound formula (amines + phenols + thioesters)
Temperature range -50°C to 150°C
Add ratio 0.5% – 1.0%

Comparative analysis of technical parameters of KPU-specific anti-yellowing agent

In order to better understand the performance of different types of KPU-specific anti-yellowing agents in practical applications, we conducted a detailed parameter comparison analysis of the above four common anti-yellowing agents. The following are the specific comparison data:

Parameter category Amine anti-yellowing agent Phenol anti-yellowing agent Thioesters anti-yellowing agents Compound anti-yellowing agent
Anti-yellowing efficiency ?????? ????? ????? ?????
Thermal Stability ?????? ????? ????? ?????
Compatibility ????? ?????? ?????? ?????
Cost-effective ????? ??????? ?????? ?????
Scope of application Car interior, home appliance housing Textile coatings, shoe materials Electronic product shells, sports equipment High-end furniture, aerospace materials

It can be seen from the table that composite anti-yellowing agents perform excellently in anti-yellowing efficiency, thermal stability and compatibility, but their cost is relatively high and suitable for high-end products. In contrast, thioesters, although slightly inferior in some properties, their economicality and high compatibility make them ideal for many common consumer products.

Practical application cases of KPU-specific anti-yellowing agent

In order to further illustrate the actual effect of KPU-specific anti-yellowing agent, the following are several typical application cases:

Case 1: Automobile interior materials

A well-known automaker added amine anti-yellowing agent to the surface materials of its seats and instrument panels, and found that the yellowing phenomenon of the product during long-term use has been significantly reduced, and user satisfaction has been greatly improved. After testing, the yellowing index of the material after the addition of anti-yellowing agent was reduced by more than 70% under ultraviolet irradiation.

Case 2: Sport shoes

A sports brand successfully solved the color change caused by long-term storage after introducing phenolic anti-yellowing agents into its sole materials. The brand’s sales data show that the return rate of products using anti-yellowing agents has dropped by nearly 50%, and customer loyalty has increased significantly.

Case 3: Electronic Product Case

After a certain electronic product manufacturer used thioester anti-yellowing agent in its shell material, it found that the product still maintained good appearance quality under high temperature environments. After a year of actual use test, the yellowing index of products with anti-yellowing agents is only 20% of those of the unadded products.

The competitive advantage brought by KPU-specific anti-yellowing agents to manufacturers

The application of KPU-specific anti-yellowing agent can not only solve the problem of yellowing of the product, but also bring many competitive advantages to manufacturers:

  1. Improve product quality: By effectively preventing yellowing, ensure that the product maintains excellent appearance quality throughout its life cycle.
  2. Enhance the brand image: High-quality products can win the trust of consumers and thus enhance the brand’s market influence.
  3. Reduce after-sales cost: Reduce return and exchange and repair costs caused by yellowing problems, and improve the profitability of the company.
  4. Expanding market space: With excellent product performance, manufacturers can enter more high-end markets and achieve business growth.

To sum up, KPU-specific anti-yellowing agents are not only an effective tool to solve industry pain points, but also a strategic tool to enhance corporate competitiveness. In the future development, with the continuous advancement of technology and changes in market demand, anti-yellowing agents will surely show their unique value in more fields.

Conclusion

KPU-specific anti-yellowing agents are a key technological innovation and are profoundly changing the application pattern of polyurethane materials. Whether in terms of technical parameters, functional characteristics or practical application effects, anti-yellowing agents have shown strong potential and broad application prospects. For manufacturers, timely introduction and reasonable application of anti-yellowing agents can not only effectively solve the problem of yellowing of products, but also bring significant competitive advantages and brand image improvement to the company. In the future market competition, whoever can master this core technology will occupy the commanding heights of industry development.

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