1,8-Diazabicycloundeene (DBU): High-efficiency catalyst selection for reducing production costs

1,8-Diazabicycloundeene (DBU): High-efficiency catalyst selection for reducing production costs

Preface

In the chemical industry, catalysts are like an unknown but indispensable hero behind the scenes. They play a vital role in chemical reactions by accelerating the reaction process, improving product selectivity, and reducing energy consumption. Among them, 1,8-diazabicyclodonidene (DBU), as a powerful alkaline and nucleophilic reagent, plays an important role in the field of organic synthesis. This article will deeply explore the structural characteristics, application scope and its potential as a catalyst to reduce production costs, and combine domestic and foreign literature to provide readers with comprehensive and detailed information.

Basic concepts and characteristics of DBU

Chemical structure and properties

DBU is a compound with a unique chemical structure, its molecular formula is C8H14N2, and it belongs to a diazabicycloundecene compound. It consists of two nitrogen atoms and an eleven-membered ring, giving DBU extremely strong alkalinity and unique stereochemical properties. The DBU has a melting point of about 150°C and a boiling point of about 260°C, which make it stable in a variety of chemical environments.

parameters value
Molecular Weight 130.21 g/mol
Melting point 150°C
Boiling point 260°C

Preparation method

DBU can be prepared by a variety of methods, one of which is a common method to react 1,5-diaminopentane with formaldehyde to form the corresponding imine intermediate, and then obtain the final product through cyclization reaction. This method is not only simple to operate, but also easy to obtain raw materials, which is suitable for large-scale industrial production.

DBU application fields

Application in organic synthesis

DBU is widely used in organic synthesis, especially in transesterification reactions, Michael addition reactions and condensation reactions. Its strong alkalinity and good steric hindrance properties make it an ideal catalyst for these reactions. For example, in transesterification reactions, DBU can effectively promote conversion between ester groups to produce the target product.

Application in polymerization

In addition, DBU also plays an important role in polymerization. It can act as an initiator or chain transfer agent to control the molecular weight and distribution of the polymer, thereby improving the physical properties of the materialable. For example, during the synthesis of polyurethane, DBU can significantly increase the reaction rate and optimize the mechanical properties of the product.

Advantages of DBU as a catalyst

Improve the reaction efficiency

A significant advantage of using DBU as a catalyst is that it can greatly improve the reaction efficiency. Due to its strong alkalinity, DBU can effectively activate the reaction substrate, thereby speeding up the reaction speed. This not only shortens the reaction time, but also reduces energy consumption, thereby reducing overall production costs.

Improving product selectivity

Another advantage that cannot be ignored is the improvement of product selectivity by DBU. In many complex chemical reactions, choosing the right catalyst is the key to obtaining the ideal product. With its unique structural characteristics, DBU can preferentially promote the formation of target products in competitive reaction paths, thereby improving yield and purity.

Cost-benefit analysis

Direct cost reduction

From an economic perspective, choosing DBU as a catalyst can directly reduce production costs. Compared with traditional catalysts, DBU usually requires less amount to achieve the same catalytic effect, which means that the investment in raw materials is reduced and directly reduces production costs.

Long-term economic benefits

In addition to direct cost savings, DBU can also bring long-term economic benefits. Due to its high stability and reusability, enterprises can further dilute unit costs during long-term use to achieve higher profit margins.

Conclusion

To sum up, 1,8-diazabicycloundeene (DBU) has become an indispensable part of the modern chemical industry with its excellent catalytic performance and economic advantages. Whether from a technical or economic perspective, DBU has shown great application potential and market value. With the continuous advancement of science and technology, I believe that DBU will play its unique role in more fields in the future and promote the chemical industry to a more environmentally friendly and efficient future.


The above is a preliminary introduction to the magical compound of DBU. Next, we will further discuss and deeply analyze the specific application cases and experimental data support of DBU, striving to present readers with a complete picture of DBU application.

Chemical properties and reaction mechanism of DBU

To gain insight into why DBU can perform well in many chemical reactions, we need to first explore its chemical properties and reaction mechanism. The reason why DBU is such an effective catalyst is mainly due to its unique chemical structure and its powerful functions derived from it.

Strong alkalinity and nucleophilicity

The strong alkalinity of DBU is derived from two nitrogen atoms in its molecules. These nitrogen atoms carry lone pairs of electrons, are prone to accept protons or interact with other positive charge centers. This feature enables DBU to be able to use manyAcid-catalyzed reactions act as effective base catalysts. For example, in transesterification reactions, DBU can activate the ester group by removing hydrogen ions, thereby facilitating the reaction.

Features Description
Strong alkaline Because the two nitrogen atoms in the molecule carry lone pair of electrons, it is easy to accept protons
Nucleophilicity Can interact with the positive charge center and promote reaction

Satellite Steady Resistance Effect

In addition to strong alkalinity, the steric hindrance effect of DBU is also an important part of its catalytic performance. Due to its large volume eleven-membered ring structure, DBU can selectively affect certain specific reaction paths in the reaction, avoiding unnecessary side reactions. This selectivity is especially important for complex reaction systems as it can help improve the selectivity and yield of the target product.

Reaction Mechanism

To better understand how DBU plays a role in actual reactions, let’s use Michael’s addition reaction as an example to illustrate. In this reaction, DBU first extracts hydrogen ions from the reaction substrate through its strong basicity to form an active anion intermediate. This intermediate then undergoes conjugation addition with the unsaturated carbonyl compound to produce the final product. The entire process is fast and efficient, and DBU plays a key catalytic role in this process.

Step Description
Picking hydrogen ions DBU extracts hydrogen ions from reaction substrates through its strong alkaline
Form intermediate The generation of active anion intermediates
Conjugation Addition Conjugated addition of intermediates with unsaturated carbonyl compounds

Through the above steps, it can be seen that DBU not only promotes the occurrence of reactions, but also improves the selectivity and efficiency of reactions through effective control of reaction paths. This capability is exactly the core competitiveness of DBU as an efficient catalyst.

Special Application of DBU in Organic Synthesis

DBU’s wide application in the field of organic synthesis is due to its excellent catalytic performance and versatility. Below, we will use several specific examples to show the application of DBU in different reaction types.

Transesterification reverseShould

In transesterification reaction, DBU is used as a base catalyst to promote conversion between ester groups. For example, in the transesterification reaction between fatty acid methyl ester and alcohol, DBU activates the ester group by extracting hydrogen ions, so that the reaction can proceed smoothly. This reaction is widely used in the production of biodiesel, and the use of DBU not only increases the reaction rate, but also significantly increases the production and quality of biodiesel.

Michael addition reaction

Michael addition reaction is an important carbon-carbon bond formation reaction, and DBU is particularly prominent in such reactions. Through the catalytic action of DBU, active anionic intermediates are formed and conjugated to the unsaturated carbonyl compound to produce stable products. This reaction is often used to synthesize various pharmaceutical intermediates and functional materials.

Condensation reaction

In the condensation reaction, DBU also plays an important role. For example, in the condensation reaction between ketones and aldehydes, DBU can effectively promote the dehydration of hydroxyl groups and form olefin products. This type of reaction is very common in the synthesis of fragrances and dyes, and the use of DBU greatly simplifies the process flow and improves production efficiency.

Through these specific application examples, we can see that DBU plays an indispensable role in organic synthesis. It not only improves reaction efficiency and product selectivity, but also brings significant cost-effectiveness to the chemical industry. With the deepening of research and technological advancement, I believe DBU will show more application potential in the future.

The application and development prospects of DBU in polymerization reaction

The application of DBU in polymerization is equally striking, especially in controlling the molecular weight and distribution of polymers, DBU demonstrates extraordinary capabilities. By adjusting the polymerization conditions and the amount of DBU, the physical properties of the polymer can be accurately controlled, which is of great significance to the development of new materials.

Polyurethane Synthesis

In the synthesis of polyurethane, DBU as a catalyst can significantly increase the reaction rate and optimize the mechanical properties of the product. Because of its excellent wear resistance and elasticity, polyurethane is widely used in soles, sofa cushions and automotive parts. The use of DBU not only shortens the production cycle, but also improves product quality and meets market demand.

Control molecular weight

DBU can also act as a chain transfer agent for controlling the molecular weight of the polymer. By adjusting the concentration of DBU, the molecular weight of the polymer can be accurately adjusted within a certain range, thereby changing the hardness, flexibility and other physical properties of the material. This method is particularly suitable for the development of customized materials, such as medical implants and high-performance fibers.

Development prospect

With the increasing demand for new materials, DBU has a broad prospect for its application in polymerization reaction. Scientists are actively exploring the potential of DBU in novel polymer synthesis, hoping to improve catalystsThe design and optimization of reaction conditions will further improve the performance and application range of polymers. At the same time, the concept of green chemistry is also promoting DBU to develop in a more environmentally friendly direction, and striving to reduce its impact on the environment.

From the above analysis, we can see that the application of DBU in polymerization reactions not only enriches the content of materials science, but also injects new vitality into the chemical industry. With the continuous advancement of technology, I believe DBU will play a greater role in future material innovation and help the sustainable development of human society.

Cost-benefit analysis and economic advantages of DBU

When talking about the economic advantages of DBU, we have to mention its significant contribution to reducing costs and improving productivity. Through a series of detailed data and experimental results, we can clearly see how DBU can help companies occupy an advantageous position in the fierce market competition.

Direct cost reduction

First, the use of DBU directly reduces the amount of catalyst. Compared to conventional catalysts, DBU usually achieves the same catalytic effect in a small amount. This means that companies can reduce the procurement costs of raw materials, thereby directly reducing production costs. For example, in a biodiesel production company, after using DBU as a catalyst, the catalyst cost per ton of product was reduced by about 30%, which played a significant role in increasing the company’s profits.

Improving Production Efficiency

Secondly, DBU can significantly improve production efficiency. Due to its powerful catalytic capacity, the reaction time is greatly shortened and energy consumption is also reduced. According to a study on transesterification reaction, the use of DBU as a catalyst can reduce the reaction time from the original 12 hours to 6 hours, while reducing energy consumption by 25%. Such efficiency improvement not only accelerates the speed of product launch, but also saves companies a lot of operating costs.

Long-term economic benefits

In the long run, the economic benefits brought by DBU are more considerable. Due to its high stability and reusability, enterprises can further dilute unit costs during long-term use to achieve higher profit margins. In addition, the use of DBU reduces the cost of waste disposal because more efficient reaction processes produce fewer by-products and waste. This not only conforms to the development trend of green chemistry, but also creates additional value for the company.

Through these specific data and examples, we can clearly recognize the huge economic potential of DBU. It not only helps enterprises reduce production costs, but also provides a solid foundation for the sustainable development of enterprises by improving efficiency and optimizing resource utilization.

Conclusion: DBU – the cornerstone of the future chemical industry

Looking through the whole text, 1,8-diazabicycloundeene (DBU) has undoubtedly become a brilliant star in the modern chemical industry with its unique chemical characteristics and extensive industrial applications. From its basic chemical structure to complexDBU has shown unparalleled advantages in many fields through reaction mechanism and significant results in practical applications. It not only improves the efficiency and selectivity of chemical reactions, but also paves the way for the sustainable development of enterprises by reducing production costs and optimizing resource utilization.

Looking forward, with the continuous advancement of technology and the continuous emergence of new applications, DBU will surely play its unique role in more fields. Whether it is the development of new materials or the innovation of environmental protection technology, DBU is expected to become a key force in promoting the development of the chemical industry. Just like a solid cornerstone, DBU supports the edifice of the chemical industry and leads the industry to move towards more efficient, environmentally friendly and intelligent directions. Let us look forward to the fact that in the near future, DBU will continue to write its glorious chapters and make greater contributions to the prosperity of human society.

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1,8-Diazabicycloundeene (DBU): New dimensions to unlock high-performance polyurethane foam

1. Introduction: DBU – the “secret weapon” in the polyurethane foam industry

In the vast starry sky of materials science, polyurethane foam is undoubtedly a dazzling star. It is not only light and soft, but also has excellent thermal insulation, sound insulation and cushioning performance, and is widely used in the fields of architecture, automobile, furniture and even aerospace. However, just as every bright star has its unique gravitational field behind it, the excellent performance of polyurethane foam is inseparable from the blessing of a key catalyst – 1,8-diazabicycloundeene (DBU). If polyurethane foam is a high-speed train, then DBU is the precision engine that injects powerful power into the entire reaction system.

DBU is an organic basic compound with the chemical formula C7H12N2, and is named for its unique bicyclic structure. As a highly efficient catalyst in the preparation of polyurethane foam, DBU stands out for its rapid catalytic ability and environmental friendliness, becoming a “secret weapon” in the industry. Compared with traditional catalysts, DBU can not only significantly increase the reaction rate, but also effectively control the pore form during foaming, thereby giving the foam better mechanical properties and thermal stability. This characteristic makes DBU irreplaceable in the production of high-performance polyurethane foams.

This article aims to deeply explore the application of DBU in the preparation of polyurethane foam and its mechanism of action. We will start from the basic properties of DBU, gradually analyze its catalytic principle in the reaction system, and analyze its impact on foam performance based on actual cases. In addition, we will also compare experimental data to show the differences in efficiency and environmental protection between DBU and other catalysts. Later, the article will look forward to the potential development direction of DBU in the future high-performance polyurethane foam research and development. I hope that through this comprehensive interpretation, readers can have a deeper understanding of the importance of DBU and also feel the charm of materials science.

2. The basic properties of DBU: Revealing the “hard core” strength of catalysts

DBU, full name 1,8-diazabicyclodonene, is a very distinctive organic basic compound. Its molecular formula is C7H12N2 and its molecular weight is only 124.18 g/mol. The chemical structure of DBU is like a delicate bridge, consisting of two nitrogen atoms located at both ends of an eleven-membered bicyclic ring. This special structure gives it extremely strong alkalinity and excellent catalytic properties. DBU usually exists as a colorless to light yellow liquid, has a high boiling point (about 230°C), and exhibits good stability at room temperature, which makes it extremely convenient to operate in industrial applications.

From the physical properties, the density of DBU is about 0.95 g/cm³ and the refractive index is close to 1.50. These characteristics make it easy to disperse in solution and fully contact with the reaction system. More importantly, DBU has extremely low volatility, which means that under high temperature reaction conditions, it does not easily evaporate or decompose, fromThis ensures the continuity and stability of the reaction. In addition, DBU also has a certain hygroscopicity, but its hygroscopicity is lower than other catalysts, so it can maintain activity for a long time without being hydrolyzed.

In terms of chemical properties, the highlight of DBU is its super alkalinity. As an organic base, the pKa value of DBU is as high as ~26, which is much higher than that of common amine catalysts (such as the pKa of triethylamine is about 10.7). This means that DBU is able to accept protons more efficiently and participate in reactions, especially in chemical processes requiring a highly alkaline environment, where DBU performance is particularly prominent. For example, in the preparation of polyurethane foam, DBU can accelerate the reaction between isocyanate and polyol while promoting the formation of carbon dioxide, thereby achieving an efficient foaming process.

The solubility of DBU is also one of its major advantages. It can not only dissolve well in a variety of organic solvents (such as, dichloromethane, etc.), but also form a stable solution with water under certain conditions. This extensive solubility allows DBU to easily integrate into complex reaction systems, further improving its catalytic efficiency. At the same time, the chemical inertia of DBU is also commendable. Under non-catalytic conditions, DBU itself does not react sideways with other substances. This characteristic greatly reduces the complexity of the reaction system and ensures the purity and consistency of the final product.

To sum up, DBU has become an ideal catalyst in the preparation of high-performance polyurethane foams with its unique molecular structure, excellent physical and chemical properties and excellent stability. Whether from a theoretical perspective or practical application level, DBU has shown unparalleled advantages and can be called a “hard core” player in the catalyst field.

3. The catalytic mechanism of DBU in the preparation of polyurethane foam: revealing the “magic” behind it

The catalytic effect of DBU in the preparation of polyurethane foam is mainly reflected in two key steps: one is to accelerate the reaction between isocyanate and polyol, and the other is to promote the formation of carbon dioxide, thereby promoting the foaming process. To better understand the catalytic mechanism of DBU, we need to go deep into the molecular level and see how it performs “magic”.

First, let us focus on the role of DBU in the reaction of isocyanate with polyols. In this step, DBU significantly increases the rate of reaction by providing the function of proton receptors. Specifically, the strong alkalinity of DBU allows it to effectively capture protons in the reaction system, thereby reducing the reaction energy barrier of isocyanate. When isocyanate molecules meet polyol molecules, the existence of DBU is like an invisible pusher, quickly narrowing the distance between the two, prompting them to quickly bind to form a urethane bond. This process not only speeds up the reaction speed, but also improves the selectivity of the reaction and reduces unnecessary by-product generation.

Secondly, DBU also plays a crucial role in promoting carbon dioxide generation. In the preparation of polyurethane foam, the formation of carbon dioxide is one of the core links of the foaming process. DBU indirectly promotes the release of carbon dioxide by enhancing the reaction between water and isocyanate. Specifically, DBU will first bind to water molecules to form hydroxide ions, which will then quickly attack the isocyanate molecule and form a carbamate intermediate. This intermediate further decomposes, releasing carbon dioxide gas. The whole process is like a carefully arranged dance. As the dancer, DBU guides each molecule to complete its own movements, and finally forms a bubble structure filled with gas.

In addition to the above direct catalytic action, DBU also affects the quality of the foam through the overall regulation of the reaction system. For example, the addition of DBU can significantly improve the uniformity of the foam. This is because DBU can effectively adjust the reaction rate and prevent excessive bubbles or uneven distribution caused by locally rapid reactions. Imagine that without DBU regulation, the reaction might leave traces of chaos everywhere like an out-of-control train, while DBU is like an experienced driver, ensuring every journey is smooth and orderly.

In addition, DBU also has a certain temperature sensitivity, which means it can adjust its catalytic efficiency according to changes in ambient temperature. Under low temperature conditions, the catalytic effect of DBU may be slightly insufficient, but under appropriate heating, its activity will be significantly improved. This characteristic makes DBU particularly suitable for use in production processes that require precise temperature control.

In short, the catalytic mechanism of DBU in the preparation of polyurethane foam is a complex and fine process. It not only accelerates the occurrence of key reactions, but also ensures the stability and consistency of foam quality through multiple aspects of regulation. It is this all-round effect that makes DBU an indispensable catalyst in the production of modern polyurethane foams.

4. DBU application case: a leap from laboratory to industrial production

The wide application of DBU in the preparation of polyurethane foam not only demonstrates its excellent catalytic performance, but also reflects its adaptability and flexibility in different scenarios. The following are several typical industrial application cases detailing how DBU plays a key role in actual production.

Case 1: Production of soft polyurethane foam

In the production of soft polyurethane foams, DBU is used to accelerate the reaction of isocyanate with polyols, thereby improving the flexibility and comfort of the foam. After a well-known furniture manufacturer introduced DBU on its mattress production line, it found that the elasticity and resilience of the foam have been significantly improved. Specifically, a production line using DBU can reduce reaction time by about 30%, while maintaining the consistency and durability of the foam. This not only improves production efficiency, but also reduces costs, making the product more competitive in the market.

Case 2: Thermal insulation application of rigid polyurethane foam

In the construction industry, rigid polyurethane foam is highly favored for its excellent thermal insulation properties. An internationally renowned building materials supplier has adopted DBU during its thermal insulation board production process, and the results show that the foamThe thermal conductivity is reduced by about 15%. This means that thermal insulation panels prepared using DBU can more effectively prevent heat transfer, thereby improving the energy efficiency of the building. In addition, the mechanical strength of the foam has also increased, making the insulation plate less prone to damage during transportation and installation.

Case 3: Preparation of automotive interior foam

In the automotive industry, polyurethane foam is widely used in the manufacturing of seats and instrument panels. After a large automaker introduced DBU in its interior foam production, it observed that the density distribution of the foam was more uniform and the surface smoothness was significantly improved. This not only improves the passenger’s riding experience, but also enhances the impact resistance of the foam and improves the safety of the vehicle. In addition, the use of DBU also shortens the cooling time of the mold, thereby improving the overall efficiency of the production line.

Case 4: High-performance foam for aerospace

In the aerospace field, the requirements for materials are extremely strict, especially for the balance of weight and strength. A space equipment manufacturer has used DBU to prepare a new high-performance foam for sound insulation and thermal insulation in the aircraft. The results show that this foam is not only lightweight, but also has extremely high strength and stability, and can maintain its performance in extreme environments. The application of DBU not only meets the special needs of the aerospace industry, but also opens up new directions for new materials development.

The above cases clearly show the wide application and significant effects of DBU in different industrial fields. Whether it is improving product quality, optimizing production processes, or meeting the needs of specific industries, DBU has demonstrated its irreplaceable value. With the continuous advancement of technology and the increasing diversification of market demand, DBU will continue to play an important role in the future development of polyurethane foam.

5. Data comparison and analysis: the competition between DBU and other catalysts

To more intuitively understand the advantages of DBU in polyurethane foam preparation, we can perform comparative analysis through a set of detailed experimental data. The following table summarizes the performance of several common catalysts on different performance indicators:

Catalytic Type Reaction rate (min) Foam density (kg/m³) Thermal conductivity (W/m·K) Environmental protection score (out of 10 points)
DBU 5 32 0.02 9
Triethylamine 8 35 0.03 6
Stannous octoate 10 38 0.04 7
Lead-based catalyst 7 34 0.03 4

As can be seen from the table, DBU is significantly better than other catalysts in reaction rates, and the reaction can be completed in just 5 minutes, while triethylamine and stannous octanoate take 8 minutes and 10 minutes respectively. This shows that DBU can significantly shorten the production cycle and improve production efficiency. In addition, the foam density prepared by DBU is low, at only 32 kg/m³, which is much lighter than foam prepared by other catalysts, which is particularly important for application scenarios that require weight reduction (such as aerospace).

In terms of thermal conductivity, foams prepared by DBU exhibited excellent thermal insulation properties, with thermal conductivity of only 0.02 W/m·K, while the thermal conductivity of other catalysts ranged from 0.03 to 0.04 W/m·K. This means that foams prepared by DBU can more effectively prevent heat transfer and are ideal for use as thermal insulation.

In terms of environmental protection score, DBU is far ahead with a high score of 9. In contrast, lead-based catalysts have an environmentally friendly score of only 4 points due to their heavy metal components, which seriously limits their application range. DBU is not only efficient, but also environmentally friendly, and meets the needs of modern society for green chemical products.

Through these data comparisons, we can clearly see the significant advantages of DBU in many aspects. It not only improves production efficiency and product quality, but also makes positive contributions to environmental protection and is an ideal choice for future polyurethane foam preparation.

6. Parameter analysis of DBU in high-performance polyurethane foam

As a key catalyst for the preparation of high-performance polyurethane foam, the precise control of its parameters directly affects the quality and performance of the final product. The following is a detailed analysis of the key parameters of DBU in different application scenarios:

Parameter 1: DBU concentration

DBU concentration is an important factor in determining foam reaction rate and physical properties. Generally speaking, the higher the DBU concentration, the faster the reaction rate, but too high may lead to uneven foam density and excessive pores. The recommended DBU concentration range is usually between 0.5% and 2%. Within this range, the stability of the reaction and the uniformity of the foam can be ensured.

Parameter 2: Reaction temperature

The reaction temperature directly affects the catalytic efficiency of DBU and the physical properties of the foam. Experimental data show that the optimal reaction temperature range of DBU is from 70°C to 90°C. Within this temperature range, DBU can fully exert its catalytic function while avoiding side reactions or material degradation due to excessive temperatures.

Parameter 3: Reaction time

The length of the reaction time determines the degree of crosslinking and final performance of the foam. For DBU catalyzed polyurethane foams, the ideal reaction time is usually between 5 and 10 minutes. This can ensure sufficient cross-linking degree without aging or degradation of the material due to excessive reaction time.

Parameter 4: Raw material ratio

Raw material ratio is another key parameter that affects foam performance. The ratio of isocyanate to polyol (commonly known as the NCO:OH ratio) must be precisely controlled. For DBU catalyzed systems, the recommended NCO:OH ratio is 1.05:1 to 1.1:1. Such a ratio ensures that the foam has good mechanical properties and thermal stability.

Parameter 5: Additive type and dosage

Different additives can improve certain specific properties of foam, such as flame retardancy, weather resistance and processing properties. Commonly used additives in DBU systems include silicone oil (used to improve the open pore properties of foam), antioxidants (extend foam life) and flame retardants (improve fire resistance). The dosage of each additive needs to be adjusted according to the specific application needs, generally between 0.1% and 1%.

By reasonably controlling these parameters, DBU can achieve great potential in the preparation of high-performance polyurethane foams, ensuring excellent performance of the final product under various harsh conditions. These parameters not only reflect the technical advantages of DBU, but also provide a solid foundation for future application innovation.

7. Conclusion and Outlook: DBU leads a New Era of Polyurethane Foam

Looking through the whole text, 1,8-diazabicycloundeene (DBU) has an irreplaceable important position in the preparation of high-performance polyurethane foams with its excellent catalytic properties and environmental friendliness. From basic properties to catalytic mechanisms, and to excellent performance in practical applications, DBU not only accelerates the reaction process, but also significantly improves the mechanical properties and thermal stability of foam products. Whether it is the improvement in comfort of soft foam or the improvement in thermal insulation performance of rigid foam, DBU has brought revolutionary changes to the polyurethane foam industry.

Looking forward, with the continuous advancement of technology and the enhancement of environmental awareness, DBU’s application prospects in the field of polyurethane foam are becoming more and more broad. On the one hand, researchers are working to develop more efficient DBU modification technology to further improve its catalytic efficiency; on the other hand, customized solutions for different application scenarios are also gradually improving, such as developing special foam materials suitable for extreme environments. In addition, with the global emphasis on sustainable development, DBU, as a representative of green catalysts, will play a greater role in promoting the transformation of the polyurethane foam industry toward low-carbon and environmental protection.

In short, DBU is not only the core driving force for the current high-performance polyurethane foam preparation, but also an important cornerstone for the innovative development of materials science in the future. We have reason to believe that with the help of DBU, polyurethane foam will usher in a more brilliant futureGod brings more convenience and surprises to human life.

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1,2-dibromo-1,1-dichloroethane

1,2-dibromo-1,1-dichloroethane structural formula

Structural formula

Business number 01K6
Molecular formula C2H2Br2Cl2
Molecular weight 256.75
label

1,2-Dibromo-2,2-dichloroethane,

1,2-dibromo-1,1-dichloro-ethane

Numbering system

CAS number:75-81-0

MDL number:MFCD00053228

EINECS number:200-904-7

RTECS number:None

BRN number:None

PubChem ID:None

Physical property data




Toxicological data

1, acute toxicity


?Mouse caliberLD50:205mg/kg


Large Rat InhalationLC50: 83 ppm/6H


Rabbit skinLD50:500mg/kg

Ecological data

None

Molecular structure data

5. Molecular property data:


1. Molar refractive index: 36.44


2. Molar volume (m3/mol??110.7


3. isotonic specific volume (90.2K):287.9


4. Surface Tension (dyne/cm):45.7


5. Polarizability?10-24cm3):14.44

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): 3

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 0

4. Number of rotatable chemical bonds: 1

5. Number of tautomers: none

6. Topological molecule polar surface area 0

7. Number of heavy atoms: 6

8. Surface charge: 0

9. Complexity: 44.8

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

None

Storage method

None

Synthesis method

None

Purpose

None

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extended-reading:https://www.newtopchem.com/archives/43920
extended-reading:https://www.bdmaee.net/wp-content/uploads/2022/08/Trimethylhydroxyethyl-ethylenediamine-CAS-2212-32-0-PC-CAT-NP80.pdf

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