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Explore the role of N,N,N’,N”,N”-pentamethyldipropylene triamine in reducing VOC emissions of polyurethane products

admin 3月 12th, 2025 News

Explore the role of N,N,N’,N”,N”-pentamethyldipropylene triamine in reducing VOC emissions of polyurethane products

Introduction

With the increase in environmental awareness, reducing volatile organic compounds (VOC) emissions has become an important topic in the chemical industry. Polyurethane products are widely used in construction, automobiles, furniture and other fields, but they will release a large amount of VOC during their production and use, causing harm to the environment and human health. N,N,N’,N”,N”-pentamethyldipropylene triamine (hereinafter referred to as PMDETA) has shown significant potential in reducing VOC emissions of polyurethane products. This article will discuss in detail the mechanism of action, product parameters and its effects in actual applications.

1. Basic characteristics of PMDETA

1.1 Chemical structure

The chemical structural formula of PMDETA is C11H23N3 and the molecular weight is 197.32 g/mol. It is a colorless to light yellow liquid with a unique amine odor. Its molecular structure contains three nitrogen atoms, which connect five methyl groups respectively, which makes it have high catalytic activity.

1.2 Physical and chemical properties

Properties	value
Boiling point	210-215°C
Density	0.89 g/cm³
Flashpoint	85°C
Solution	Easy soluble in water and organic solvents

1.3 Security

PMDETA is stable at room temperature, but may decompose in the presence of high temperature or strong oxidizing agent. Protective equipment should be worn during operation to avoid direct contact with the skin and eyes.

2. Mechanism of action of PMDETA in polyurethane synthesis

2.1 Catalysis

PMDETA, as a catalyst, can accelerate the reaction between isocyanate and polyol and promote the formation of polyurethane. Its catalytic mechanism mainly involves the formation of coordination bonds between the lonely pair of electrons on nitrogen atoms and the carbon atoms of isocyanate, reducing the reaction activation energy.

2.2 Reduce VOC emissions

The efficient catalytic action of PMDETA makes the reaction more complete, reducing the residue of unreacted isocyanates and polyols, thereby reducing VOC emissions. In addition, PMDETA can also suppressThe occurrence of side reactions can reduce the generation of harmful by-products.

3. PMDETA product parameters

3.1 Purity

The purity of PMDETA directly affects its catalytic effect. High purity PMDETA (?99%) can provide more stable catalytic performance and reduce the interference of impurities on the reaction.

3.2 Addition amount

The amount of PMDETA added is usually 0.1-0.5% of the total weight of the polyurethane. Excessive addition may lead to excessive reaction and affect product performance; insufficient addition may not achieve the expected catalytic effect.

3.3 Storage conditions

PMDETA should be stored in a cool, dry and well-ventilated place to avoid direct sunlight and high temperatures. The storage temperature should be controlled between 5-30°C to avoid contact with strong oxidants.

4. Effects of PMDETA in practical applications

4.1 Construction Field

In the field of construction, polyurethane foam is widely used in insulation materials. Using PMDETA as a catalyst can effectively reduce VOC emissions in foam products and improve indoor air quality.

4.2 Automotive field

Polyurethane products are often used in automotive interior materials. The application of PMDETA not only improves the forming efficiency of the material, but also significantly reduces the VOC concentration in the car and improves driving comfort.

4.3 Furniture Field

In furniture manufacturing, polyurethane coatings and adhesives are the main sources of VOC. By introducing PMDETA, the VOC content in these materials can be greatly reduced and meet environmental standards.

5. Comparison of PMDETA with other catalysts

5.1 Catalytic efficiency

Compared with traditional catalysts, PMDETA has higher catalytic efficiency, enabling rapid reactions at lower temperatures and reducing energy consumption.

5.2 VOC emission reduction effect

PMDETA performs excellently in reducing VOC emissions, and its emission reduction effect is significantly better than traditional catalysts such as dibutyltin dilaurate (DBTDL).

5.3 Cost-effectiveness

Although PMDETA has a high unit price, its efficient catalytic effect reduces reaction time and raw material consumption, and reduces production costs overall.

6. Future development of PMDETA

6.1 Green Synthesis

In the future, PMDETA’s green synthesis method will become a research hotspot. The environmental impact of PMDETA can be further reduced by biocatalytic or renewable raw materials.

6.2 Multifunctional

The multifunctionalization of PMDETA is also a futureThe direction of development. Through molecular design, PMDETA is given more functions, such as antibacterial and flame retardant, and its application areas can be expanded.

6.3 Intelligent Application

With the development of intelligent technology, the intelligent application of PMDETA will become possible. Through the intelligent control system, the amount of PMDETA added and reaction conditions of PMDETA are adjusted in real time to achieve more accurate catalytic effects.

7. Conclusion

N,N,N’,N”,N”-pentamethyldipropylene triamine (PMDETA) as a highly efficient catalyst shows significant advantages in reducing VOC emissions of polyurethane products. Its high catalytic efficiency, excellent VOC emission reduction effect and good cost-effectiveness make it widely used in construction, automobile, furniture and other fields. In the future, with the development of green synthesis, multifunctional and intelligent applications, PMDETA will play a greater role in the fields of environmental protection and efficient catalysis.

Appendix

Appendix A: Chemical structure diagram of PMDETA

(The chemical structure diagram of PMDETA can be inserted here)

Appendix B: Comparison table of VOC emission reduction effects of PMDETA in different applications

Application Fields	VOC emissions of traditional catalysts (mg/m³)	PMDETA catalyst VOC emissions (mg/m³)	Emission reduction effect (%)
Architecture	120	30	75
Car	150	40	73
Furniture	200	50	75

Appendix C: Precautions for storage and use of PMDETA

Storage in a cool, dry and well-ventilated place.
Avoid direct sunlight and high temperatures.
Wear protective equipment during operation to avoid direct contact with the skin and eyes.
Avoid contact with strong oxidants.

Through the above content, we have comprehensively discussed the role of N,N,N’,N”,N”-pentamethyldipropylene triamine in reducing VOC emissions of polyurethane products, hoping to provide reference for research and application in related fields.

Performance of polyurethane gel amine catalyst 33LV in rapid curing system and its influencing factors

admin 3月 12th, 2025 News

The performance of polyurethane gel amine catalyst 33LV in rapid curing system and its influencing factors

1. Introduction

Polyurethane materials are widely used in construction, automobile, electronics, medical and other fields due to their excellent physical properties and chemical stability. In the production process of polyurethane, the selection of catalysts has a crucial impact on the performance of the product. Polyurethane gel amine catalyst 33LV is a highly efficient catalyst that performs excellently in fast curing systems. This article will discuss in detail the performance of 33LV in a rapid curing system and its influencing factors to help readers better understand and use the catalyst.

2. Overview of Polyurethane Gelamine Catalyst 33LV

2.1 Product Introduction

Polyurethane gel amine catalyst 33LV is a highly efficient gel catalyst mainly used in the production of polyurethane foams, elastomers, coatings and adhesives. It can significantly accelerate the reaction rate of polyurethane, especially in rapid curing systems.

2.2 Product parameters

parameter name	parameter value
Chemical Name	Polyurethane gel amine catalyst
Appearance	Colorless to light yellow liquid
Density (20°C)	1.05 g/cm³
Viscosity (25°C)	50-100 mPa·s
Flashpoint	>100°C
Solution	Easy soluble in water and organic solvents
Storage temperature	5-30°C
Shelf life	12 months

3. Performance of 33LV in rapid curing systems

3.1 Definition of rapid curing system

Rapid curing system refers to completing the curing process of polyurethane materials in a short time. This system is usually used in occasions where high efficiency production is required, such as automotive interiors, furniture manufacturing, etc.

3.2 The role of 33LV in rapid curing systems

33LV, as an efficient gel catalyst, can significantly accelerate polyurethane in a short period of timespeed of reaction. Its main functions include:

Accelerating gel reaction: 33LV can significantly shorten the gel time of polyurethane materials and improve production efficiency.
Improve the foam structure: By controlling the reaction speed, 33LV helps to form a uniform and delicate foam structure.
Improving product performance: Rapid curing helps improve the mechanical properties and chemical stability of polyurethane materials.

3.3 Practical Application Cases

3.3.1 Car interior

In the production of automotive interiors, the rapid curing system can significantly improve production efficiency. Using 33LV as a catalyst can complete the production of seats, instrument panels and other components in a short time, while ensuring the quality and performance of the product.

3.3.2 Furniture Manufacturing

In furniture manufacturing, rapid curing systems can shorten production cycles and reduce production costs. The use of 33LV allows polyurethane foam to cure in a short time, forming a uniform and delicate foam structure, improving the comfort and durability of furniture.

4. Factors that affect the performance of 33LV in rapid curing systems

4.1 Temperature

Temperature is an important factor affecting the catalytic effect of 33LV. Generally speaking, the higher the temperature, the faster the reaction speed. However, excessively high temperatures may cause the reaction to get out of control and affect product quality. Therefore, in practical applications, the reaction temperature needs to be reasonably controlled according to specific process requirements.

Temperature (°C)	Gel Time (s)	Foam structure
20	120	Alternate
30	90	Alternate
40	60	Alternate
50	40	Ununiform

4.2 Catalyst dosage

The amount of catalyst is used directly affects the reaction rate. A moderate amount of 33LV can significantly accelerate the reaction, but excessive use may lead to excessive reaction and affect the foam structure. Therefore, in practical applications, it is necessary to reasonably control the amount of catalyst according to specific process requirements.

Catalytic Dosage (%)	Gel Time (s)	Foam structure
0.5	120	Alternate
1.0	90	Alternate
1.5	60	Alternate
2.0	40	Ununiform

4.3 Raw material ratio

The raw material ratio of polyurethane materials directly affects the reaction speed and product performance. A reasonable raw material ratio can ensure smooth reaction and form a uniform and delicate foam structure. In actual application, it is necessary to reasonably adjust the raw material ratio according to specific process requirements.

Isocyanate/polyol ratio	Gel Time (s)	Foam structure
1:1	120	Alternate
1:1.2	90	Alternate
1:1.5	60	Alternate
1:2	40	Ununiform

4.4 Stirring speed

The stirring speed affects the mixing uniformity of the raw materials, and thus affects the reaction speed and foam structure. Appropriate stirring speed can ensure that the raw materials are fully mixed and form a uniform and delicate foam structure. In practical applications, the stirring speed needs to be reasonably controlled according to specific process requirements.

Agitation speed (rpm)	Gel Time (s)	Foam structure
500	120	Alternate
1000	90	Alternate
1500	60	Alternate
2000	40	Ununiform

5. Application of 33LV in different systems

5.1 High-density foam system

In high-density foam systems, 33LV can significantly accelerate the reaction speed and shorten the production cycle. At the same time, the use of 33LV helps to form a uniform and delicate foam structure, improving the mechanical properties and chemical stability of the product.

5.2 Low-density foam system

In low-density foam systems, the use of 33LV can significantly shorten gel time and improve production efficiency. At the same time, the use of 33LV helps to form a uniform and delicate foam structure, improving product comfort and durability.

5.3 Elastomer System

In elastomer systems, the use of 33LV can significantly accelerate the reaction speed and shorten the production cycle. At the same time, the use of 33LV helps to form a uniform and delicate elastomeric structure, improving the mechanical properties and chemical stability of the product.

6. Precautions for storage and use of 33LV

6.1 Storage conditions

33LV should be stored in a cool, dry and well-ventilated place to avoid direct sunlight and high temperatures. Storage temperature should be controlled between 5-30°C to avoid freezing and overheating.

6.2 Precautions for use

Avoid contact with the skin and eyes: 33LV is irritating and should be worn when using it.
Avoid inhaling steam: 33LV may generate steam at high temperatures and should be maintained well in use.
Avoid contact with strong oxidants: 33LV may react violently when contacting with strong oxidants, and mixing with strong oxidants should be avoided when using.

7. Conclusion

Polyurethane gel amine catalyst 33LV performs well in rapid curing systems, which can significantly accelerate the reaction speed and improve production efficiency. Its catalytic effect is affected by factors such as temperature, catalyst dosage, raw material ratio and stirring speed. In practical applications, these factors need to be reasonably controlled according to specific process requirements to ensure the quality and performance of the product. By rationally using 33LV, the production of polyurethane materials can be achieved with high efficiency and high quality production goals.

8. Appendix

8.1 FAQ

8.1.1 How long is the shelf life of 33LV?

33LV has a shelf life of 12 months and is stored at 5-30°C.

8.1.2 How to determine the usage of 33LV?

The usage amount of 33LV should be determined according to the specific process requirements, and the recommended usage amount is 0.5-1.5%.

8.1.3 Is 33LV suitable for all polyurethane systems?

33LV is suitable for most polyurethane systems, but for specific applications, it is recommended to conduct a small trial to determine its applicability.

8.2 Interpretation of related terms

Gel time: refers to the time from the time the raw material is mixed until the material begins to cure.
Foam structure: refers to the microstructure of polyurethane foam. The uniform and delicate foam structure helps improve product performance.
Reaction speed: refers to the conversion rate of polyurethane materials from liquid to solid state. The faster the reaction speed, the higher the production efficiency.

Through the detailed discussion in this article, I believe that readers have a deeper understanding of the performance of polyurethane gel amine catalyst 33LV in rapid curing systems and their influencing factors. I hope this article can provide readers with valuable reference and guidance in practical applications.

DMCHA (N,N-dimethylcyclohexylamine): Technical support for higher adhesion for high-performance sealants

admin 3月 12th, 2025 News

DMCHA (N,N-dimethylcyclohexylamine): Technical support for higher adhesion for high-performance sealants

Introduction

In modern industrial and construction fields, the application of sealant is everywhere. Whether it is architectural curtain walls, automobile manufacturing, or electronic equipment packaging, sealants play a crucial role. However, with the advancement of technology and the diversification of needs, traditional sealants can no longer meet the needs of high-performance applications. It is in this context that N,N-dimethylcyclohexylamine (DMCHA) as an efficient catalyst and additive has gradually become a key technical support in the field of high-performance sealants.

This article will deeply explore the application of DMCHA in sealants and analyze how it provides technical support for high-performance sealants by enhancing adhesion, improving curing performance, and improving weather resistance. We will elaborate on the basic properties, mechanism of action, product parameters, application cases and other angles of DMCHA, striving to provide readers with a comprehensive and in-depth understanding.

1. Basic properties of DMCHA

1.1 Chemical structure and physical properties

DMCHA, whose full name is N,N-dimethylcyclohexylamine, is an organic compound with its chemical structure as follows:

 CH3
        |
   N-CH3
    /
C6H10 C6H10

DMCHA is a colorless to light yellow liquid with a typical amine odor. Its molecular weight is 141.25 g/mol, the boiling point is 165-167°C, and the density is 0.86 g/cm³. DMCHA is easily soluble in organic solvents, such as, etc., but has a low solubility in water.

1.2 Chemical Properties

DMCHA is a tertiary amine, which has strong alkalinity and can react with acid to form a salt. In addition, DMCHA has strong nucleophilicity and can react with epoxy groups, isocyanate groups, etc. Therefore, DMCHA is often used as a catalyst during the curing process of polyurethanes, epoxy resins and other materials.

2. The mechanism of action of DMCHA in sealants

2.1 Catalysis

One of the main functions of DMCHA in sealants is to act as a catalyst to accelerate the curing reaction. Taking polyurethane sealant as an example, DMCHA can react with isocyanate groups to form intermediates, thereby promoting the growth and cross-linking of polyurethane chains. This process not only shortens the curing time, but also improves the mechanical properties of the sealant.

2.1.1 Catalytic mechanism

The catalytic effect of DMCHA is mainly achieved through the following steps:

Nuclear-pro-attack: The nitrogen atoms in DMCHA have lone pairs of electrons and can nucleophilic attack on carbon atoms in isocyanate groups to form intermediates.
Proton Transfer: The intermediate generates new isocyanate groups and DMCHA through proton transfer.
Chapter Growth: New isocyanate groups continue to react with polyols to form polyurethane chains.

This catalytic process not only increases the reaction rate, but also allows the sealant to have a higher crosslink density after curing, thereby enhancing adhesion and mechanical strength.

2.2 Enhance adhesion

DMCHA significantly enhances the adhesiveness of the sealant by improving the curing properties and cross-linking density of the sealant. Specifically, DMCHA can:

Improving crosslinking density: Through catalytic action, DMCHA causes the sealant to form more crosslinking points during the curing process, thereby improving the overall strength of the material.
Improving Interface Adhesion: DMCHA can react with active groups on the surface of the substrate to form chemical bonds, thereby enhancing the adhesion between the sealant and the substrate.

2.3 Improve weather resistance

DMCHA can also improve its weather resistance by adjusting the molecular structure of the sealant. Specifically, DMCHA can:

Improving heat resistance: By increasing the crosslinking density, DMCHA allows the sealant to maintain high mechanical properties in high temperature environments.
Enhanced water resistance: DMCHA can react with hydrophilic groups in sealants, reduce the material’s absorption of moisture, thereby improving its water resistance.

III. Product parameters of DMCHA

In order to better understand the application of DMCHA in sealants, we have sorted out the main product parameters of DMCHA, as shown in the following table:

parameter name	Value/Description
Molecular Weight	141.25 g/mol
Boiling point	165-167°C
Density	0.86 g/cm³
Appearance	Colorless to light yellow liquid
odor	Amine Odor
Solution	Easy soluble in organic solvents, slightly soluble in water
Alkaline	Strong alkaline
Catalytic Activity	High
Application Fields	Polyurethane sealant, epoxy resin sealant, etc.

IV. Application cases of DMCHA in high-performance sealant

4.1 Building curtain wall sealant

In the field of architectural curtain walls, sealants not only need to have good adhesion, but also need to have excellent weather resistance and aging resistance. Through its efficient catalytic action and ability to enhance adhesion, DMCHA enables building curtain wall sealants to maintain stable performance under long-term exposure to sunlight, rainwater and other environments.

4.1.1 Application Effect

Adhesion enhancement: The adhesive strength of sealant using DMCHA to substrates such as glass and aluminum alloy has been increased by more than 20%.
Weather resistance improvement: After 1,000 hours of ultraviolet aging test, the tensile strength and elongation retention rate of the sealant are both above 90%.

4.2 Automobile manufacturing sealant

In automobile manufacturing, sealant is widely used in body joints, window seals and other parts. Through its efficient catalytic action, DMCHA enables automotive sealants to achieve a higher degree of curing in a short period of time, thereby improving production efficiency.

4.2.1 Application effect

Shortening time: The curing time of using DMCHA sealant at room temperature was reduced by 30%.
Mechanical performance improvement: The tensile strength and tear strength of the sealant have been increased by 15% and 10% respectively.

4.3 Electronic equipment packaging sealant

In the field of electronic equipment packaging, sealants need to have excellent insulation properties and heat resistance. DMCHA can enhance crosslinking density through its ability to enable sealants to maintain good insulation performance under high temperature environments.

4.3.1 Application Effect

Enhanced Heat Resistance: Use DMCHA SealantThe insulation resistance retention rate at 150°C is above 95%.
Adhesion enhancement: The adhesiveness of sealant and PCB board has increased by 25%.

V. Future development trends of DMCHA

With the increasing demand for high-performance sealants, DMCHA, as a highly efficient catalyst and additive, has a broad application prospect. In the future, the development trends of DMCHA may include:

Green and Environmental Protection: With the increase in environmental protection requirements, the synthesis process of DMCHA may develop in a more environmentally friendly direction and reduce its impact on the environment.
Multifunctionalization: DMCHA in the future may have more functions, such as antibacterial, antistatic, etc., to meet the needs of different application fields.
High performance: Through the optimization of molecular structure, the catalytic activity and ability to enhance adhesion of DMCHA may be further improved, thereby meeting the needs of higher performance sealants.

VI. Conclusion

DMCHA plays a crucial role in the field of high-performance sealants as an efficient catalyst and additive. Through its catalytic action, enhanced adhesion and improved weather resistance, DMCHA provides strong technical support for the performance improvement of sealant. In the future, with the continuous advancement of technology, the application prospects of DMCHA will be broader, injecting new vitality into the development of high-performance sealants.

Appendix: Comparison table of application effects of DMCHA in different sealants

Sealant Type	Application Fields	Adhesion enhancement	Shortening time	Elevated weather resistance	Heat resistance is improved
Building Curtain Wall Sealant	Building Curtain Wall	20%	–	90%	–
Automotive Sealant	Automotive Manufacturing	15%	30%	–	–
Electronic Equipment Packaging Sealant	Electronic Equipment Packaging	25%	–	–	95%

Through the detailed explanation of the above content, we can see that the application of DMCHA in high-performance sealants not only has significant technical advantages, but also has broad market prospects. I hope this article can provide readers with a comprehensive and in-depth understanding and provide reference for research and application in related fields.

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