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N,N,N’,N”,N”-pentamethyldipropylene triamine: Provides technical support for the manufacture of high-strength polyurethane adhesives

3月 12th, 2025 News

N,N,N’,N”,N”-pentamethyldipropylene triamine: Provides technical support for the manufacture of high-strength polyurethane adhesives

Introduction

In modern industry, polyurethane adhesives are widely used in construction, automobile, electronics, packaging and other fields due to their excellent bonding properties, chemical resistance and mechanical strength. However, with the diversification of application scenarios and the improvement of material performance requirements, traditional polyurethane adhesives have become unscrupulous in certain high-demand occasions. To meet these needs, scientists have been constantly exploring new materials and technologies, among which N,N,N’,N”,N”-pentamethyldipropylene triamine (hereinafter referred to as pentamethyldipropylene triamine) is a new catalyst and crosslinker, providing strong technical support for the manufacture of high-strength polyurethane adhesives.

This article will introduce in detail the chemical properties of pentamethyldipropylene triamine, its mechanism of action in polyurethane adhesives, product parameters and its performance in practical applications. Through rich forms and easy-to-understand language, readers can fully understand the importance and application prospects of this material.

1. Chemical properties of pentamethyldipropylene triamine

1.1 Chemical structure

The chemical formula of pentamethyldipropylene triamine is C11H23N3, and its molecular structure is as follows:

 CH3
    |
CH3-N-CH2-CH2-N-CH2-CH2-N-CH3
    |
   CH3

Structurally, pentamethyldipropylene triamine is an organic compound containing three nitrogen atoms, each with a methyl group attached to it. This structure imparts unique chemical properties to the compound, allowing it to exhibit excellent catalytic activity and crosslinking ability in the polyurethane reaction.

1.2 Physical Properties

Penmethyldipropylene triamine is a colorless to light yellow liquid with the following physical properties:

Properties value
Molecular Weight 197.32 g/mol
Density 0.89 g/cm³
Boiling point 220-230°C
Flashpoint 95°C
Solution Easy soluble in water and organic solvents

1.3 Chemical Properties

Penmethyldipropylene triamine has the following chemical properties:

  • Basic: Since the molecule contains three nitrogen atoms, pentamethyldipropylene triamine is highly alkaline and can react with acid to form salts.
  • Catalytic Activity: In polyurethane reaction, pentamethyldipropylene triamine can effectively catalyze the reaction between isocyanate and polyol, and accelerate the polymerization process.
  • Crosslinking capability: Pentamethyldipropylene triamine can react with isocyanate to form a three-dimensional network structure, improving the mechanical strength and chemical resistance of polyurethane materials.

Diagram of action of pentamethyldipropylene triamine in polyurethane adhesive

2.1 Catalysis

In the preparation of polyurethane adhesive, the reaction of isocyanate and polyol is a key step. Pentamethyldipropylene triamine, as an efficient catalyst, can significantly accelerate this reaction. Its mechanism of action is as follows:

  1. Activated isocyanate: The nitrogen atoms in pentamethyldipropylene triamine can form coordination bonds with the carbon atoms in isocyanate, thereby activating isocyanate molecules and making them easier to react with polyols.
  2. Promote reaction equilibrium: Pentamethyldipropylene triamine can adjust the pH value of the reaction system, promote the reaction in the direction of polyurethane generation, and improve the reaction efficiency.

2.2 Crosslinking

Penmethyldipropylene triamine can not only catalyze the polyurethane reaction, but also participate in the reaction as a crosslinker. The mechanism of cross-linking is as follows:

  1. Reaction with isocyanate: The nitrogen atom in pentamethyldipropylene triamine can react with isocyanate to form urea bonds or carbamate bonds, thereby forming a crosslinking point between the polyurethane molecular chains.
  2. Form a three-dimensional network structure: Through cross-linking reaction, pentamethyldipropylene triamine can connect linear polyurethane molecular chains into a three-dimensional network structure, significantly improving the mechanical strength and chemical resistance of the material.

2.3 Improve adhesive performance

The application of pentamethyldipropylene triamine in polyurethane adhesives can also significantly improve the adhesive properties. Its mechanism of action is as follows:

  1. Enhanced interface binding force: Pentamethyldipropylene triamine can react with active groups on the surface of the substrate to form chemical bonds, thereby enhancing the interface binding force between the adhesive and the substrate.
  2. Enhance the innerPolyst strength: Through cross-linking, pentamethyldipropylene triamine can improve the cohesive strength of polyurethane adhesives, making it less likely to break when under stress.

Product parameters of trimethoxydipropylene triamine

3.1 Product Specifications

The product specifications of pentamethyldipropylene triamine are as follows:

parameters value
Appearance Colorless to light yellow liquid
Purity ?99%
Moisture content ?0.1%
Acne ?0.1 mg KOH/g
Amine Value 280-320 mg KOH/g
Viscosity (25°C) 10-15 mPa·s
Density (25°C) 0.89 g/cm³
Flashpoint 95°C
Boiling point 220-230°C

3.2 Recommendations for use

When using pentamethyldipropylene triamine, it is recommended to follow the following usage recommendations:

  1. Additional amount: The amount of pentamethyldipropylene triamine is usually 0.5-2.0% of the total weight of the polyurethane adhesive. The specific amount of addition should be adjusted according to actual application requirements.
  2. Mixing method: Pentamethyldipropylene triamine should be fully mixed with other raw materials to ensure that it is evenly distributed in the reaction system.
  3. Reaction conditions: The catalytic activity of pentamethyldipropylene triamine is greatly affected by temperature, and it is recommended to conduct reactions within the temperature range of 25-50°C.

The performance of tetramethyldipropylene triamine in practical applications

4.1 Construction Field

In the field of construction, polyurethane adhesives are widely used in wall insulation, floor laying, curtain wall installation and other occasions. The introduction of pentamethyldipropylene triamine significantly improvedThe bonding strength and durability of polyurethane adhesives. For example, in wall insulation systems, the use of pentamethyldipropylene triamine modified polyurethane adhesive can effectively prevent the insulation material from falling off and extend the service life of the building.

4.2 Automotive field

In automobile manufacturing, polyurethane adhesives are used in occasions such as body structure bonding and interior parts fixing. The application of pentamethyldipropylene triamine allows polyurethane adhesives to maintain good bonding properties in harsh environments such as high temperature and high humidity. For example, in body structure bonding, the use of pentamethyldipropylene triamine modified polyurethane adhesive can significantly improve the impact resistance and durability of the vehicle body.

4.3 Electronics Field

In the electronic field, polyurethane adhesives are used in circuit board packaging, electronic component fixation and other occasions. The introduction of pentamethyldipropylene triamine allows polyurethane adhesive to maintain good bonding properties under harsh environments such as high temperature and high humidity. For example, in circuit board packages, the use of pentamethyldipropylene triamine modified polyurethane adhesive can effectively prevent the circuit board from getting damp and improve the reliability of electronic products.

4.4 Packaging Field

In the packaging field, polyurethane adhesives are used in carton sealing, label pasting and other occasions. The application of pentamethyldipropylene triamine allows polyurethane adhesives to maintain good bonding performance on high-speed production lines. For example, in carton seals, the use of pentamethyldipropylene triamine modified polyurethane adhesive can significantly increase the seal strength and prevent the carton from cracking during transportation.

The future development of pentamethyldipropylene triamine

5.1 Green and environmentally friendly

With the increase in environmental awareness, green and environmentally friendly polyurethane adhesives have become the trend of future development. As a highly efficient catalyst and crosslinking agent, pentamethyldipropylene triamine can realize polyurethane reaction at lower temperatures, reducing energy consumption and environmental pollution. In the future, pentamethyldipropylene triamine is expected to be more widely used in green and environmentally friendly polyurethane adhesives.

5.2 High performance

With the diversification of application scenarios and the improvement of material performance requirements, high performance has become an important direction for the development of polyurethane adhesives. Pentamethyldipropylene triamine can significantly improve the mechanical strength, chemical resistance and durability of polyurethane adhesives through its unique catalytic action and crosslinking ability. In the future, pentamethyldipropylene triamine is expected to play a greater role in high-performance polyurethane adhesives.

5.3 Multifunctional

With the advancement of technology, multifunctionalization has become an important trend in the development of polyurethane adhesives. Pentamethyldipropylene triamine can not only improve the adhesive properties of polyurethane adhesives, but also impart special functions such as antibacterial, conductive, and flame retardant. In the future, pentamethyldipropylene triamine is expected to be widely used in multifunctional polyurethane adhesives.

Conclusion

N,N,N’,N”,N”-pentamethyldipropylene triamine, as a new catalyst and crosslinking agent, provides strong technical support for the manufacture of high-strength polyurethane adhesives. Through its unique chemical characteristics and mechanism of action, pentamethyldipropylene triamine can significantly improve the adhesive properties, mechanical strength and durability of polyurethane adhesives. In practical applications, pentamethyldipropylene triamine has excellent performance in construction, automobile, electronics, packaging and other fields. In the future, with the development trend of green, environmentally friendly, high-performance and multifunctionalization, pentamethyldipropylene triamine is expected to play a greater role in the field of polyurethane adhesives and provide stronger technical support for industrial development.

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N,N,N’,N”,N”-Penmethyldipropylene triamine: a multifunctional catalyst suitable for a variety of polyurethane formulations

3月 12th, 2025 News

N,N,N’,N”,N”-Penmethyldipropylene triamine: a multifunctional catalyst suitable for a variety of polyurethane formulations

Catalog

  1. Introduction
  2. Product Overview
  3. Chemical structure and properties
  4. Product Parameters
  5. Application Fields
  6. How to use and precautions
  7. Safety and Environmental Protection
  8. Conclusion

1. Introduction

Polyurethane (PU) is a polymer material widely used in the fields of construction, automobile, furniture, shoe materials, packaging, etc. Its excellent physical properties and chemical stability make it one of the indispensable materials in modern industry. However, the choice of catalyst is crucial in the production process of polyurethane, which not only affects the reaction rate, but also directly affects the performance of the final product. N,N,N’,N”,N”-pentamethyldipropylene triamine (hereinafter referred to as “pentamethyldipropylene triamine”) is a multifunctional catalyst. Due to its high efficiency, stability, environmental protection and other characteristics, it has gradually become one of the preferred catalysts in polyurethane production.

This article will introduce in detail the chemical structure, product parameters, application fields, usage methods, safety and environmental protection of pentamethyldipropylene triamine, aiming to provide readers with a comprehensive and in-depth understanding.

2. Product Overview

Penmethyldipropylene triamine is an organic amine compound with multiple methyl substituents and contains three nitrogen atoms in its molecular structure. This structure gives it excellent catalytic properties, especially in polyurethane reaction, which can effectively promote the reaction between isocyanate and polyol, shorten the reaction time and improve production efficiency.

2.1 Product Name

  • Chinese name: N,N,N’,N”,N”-pentamethyldipropylene triamine
  • English name: N,N,N’,N”,N”-Pentamethyldipropylenenetriamine

2.2 Molecular formula and molecular weight

  • Molecular formula: C11H25N3
  • Molecular weight: 199.34 g/mol

2.3 CAS number

  • CAS number: 3855-32-1

3. Chemical structure and properties

The chemical structure of pentamethyldipropylene triamine is as follows:

 CH3
        |
CH3-N-CH2-CH2-N-CH2-CH2-N-CH3
        ||
       CH3 CH3

Structurally, pentamethyldipropylene triamine contains three nitrogen atoms, and each nitrogen atom is connected with a methyl group. This structure makes it highly alkaline and good solubility, and can be miscible with a variety of organic solvents.

3.1 Physical Properties

  • Appearance: Colorless to light yellow liquid
  • Density: 0.89 g/cm³ (20°C)
  • Boiling point: 220-230°C
  • Flash point: 98°C
  • Solution: easy to soluble in organic solvents such as water, alcohols, ethers

3.2 Chemical Properties

  • Basicity: Pentamethyldipropylene triamine has strong alkalinity and can react with acid to form salts.
  • Catalytic properties: In polyurethane reaction, pentamethyldipropylene triamine can effectively promote the reaction between isocyanate and polyol, shorten the gel time, and improve the reaction efficiency.

4. Product parameters

To understand the properties of pentamethyldipropylene triamine more intuitively, the following table lists its main product parameters:

parameter name Value/Description
Appearance Colorless to light yellow liquid
Density (20°C) 0.89 g/cm³
Boiling point 220-230°C
Flashpoint 98°C
Solution Easy soluble in organic solvents such as water, alcohols, ethers
Molecular Weight 199.34 g/mol
CAS number 3855-32-1
Storage Conditions Cool, dry and ventilated places to avoid direct sunlight
Shelf life 12 months

5. Application areas

Penmethyldipropylene triamine is a multifunctional catalyst and is widely used in a variety of polyurethane formulations. byHere are its main application areas:

5.1 Rigid polyurethane foam

Rough polyurethane foam is widely used in building insulation, refrigeration equipment, pipeline insulation and other fields. Pentamethyldipropylene triamine can effectively promote the reaction between isocyanate and polyol, shorten the foaming time, and improve the closed cell rate and mechanical strength of the foam.

5.2 Soft polyurethane foam

Soft polyurethane foam is mainly used in furniture, mattresses, car seats and other fields. Pentamethyldipropylene triamine can adjust the softness and elasticity of the foam, improve the open-cell structure of the foam, and improve comfort and durability.

5.3 Polyurethane coating

Polyurethane coatings have excellent wear resistance, weather resistance and decorative properties, and are widely used in construction, automobile, furniture and other fields. Pentamethyldipropylene triamine can promote the curing reaction of the coating, shorten the drying time, and improve the adhesion and gloss of the coating.

5.4 Polyurethane Adhesive

Polyurethane adhesives have excellent bonding strength and weather resistance, and are widely used in bonding of wood, metal, plastic and other materials. Pentamethyldipropylene triamine can promote the curing reaction of adhesives, improve bonding strength and water resistance.

5.5 Polyurethane elastomer

Polyurethane elastomers have excellent wear resistance, elasticity and oil resistance, and are widely used in seals, tires, conveyor belts and other fields. Pentamethyldipropylene triamine can promote the cross-linking reaction of elastomers, improve its mechanical properties and aging resistance.

6. Methods and precautions

6.1 How to use

Penmethyldipropylene triamine is usually used in liquid form and can be added directly to polyurethane formulations. The specific usage method is as follows:

  1. Addition amount: According to different polyurethane formulations, the amount of pentamethyldipropylene triamine is generally 0.1%-1.0% (by weight of polyol).
  2. Mixing method: Mix pentamethyldipropylene triamine with polyol to ensure uniform dispersion.
  3. Reaction conditions: Reaction is carried out at room temperature or heating conditions, and the specific temperature and time are adjusted according to the formula requirements.

6.2 Notes

  1. Storage conditions: Pentamethyldipropylene triamine should be stored in a cool, dry and ventilated place to avoid direct sunlight and high temperatures.
  2. Safe Operation: Wear protective gloves, glasses and masks during operation to avoid direct contact with the skin and eyes.
  3. Waste Disposal: Abandoned Five ABasic dipropylene triamine should be treated in accordance with local environmental protection regulations to avoid pollution of the environment.

7. Safety and Environmental Protection

7.1 Security Information

Penmethyldipropylene triamine is an organic amine compound and has certain irritation and corrosiveness. The following is its security information:

  • Skin contact: It may cause skin irritation. You should immediately rinse with a lot of clean water and seek medical treatment if necessary.
  • Eye contact: It may cause eye irritation. You should immediately rinse with a lot of clean water and seek medical treatment if necessary.
  • Inhalation: It may cause respiratory irritation and should be moved to a fresh place in the air quickly and seek medical treatment if necessary.
  • Ingestion: It may cause gastrointestinal irritation. You should rinse your mouth immediately and seek medical treatment if necessary.

7.2 Environmental Protection Information

Pentamethyldipropylene triamine should comply with circulation protection regulations during production and use to reduce environmental pollution. The following is its environmental protection information:

  • Wastewater treatment: Wastewater containing pentamethyldipropylene triamine should be discharged after neutralization to avoid contaminating water bodies.
  • Waste Gas Treatment: The waste gas generated during the production process should be discharged after absorption and treatment to avoid polluting the atmosphere.
  • Solid Waste Treatment: Disposable pentamethyldipropylene triamine should be treated in accordance with hazardous waste to avoid contamination of soil.

8. Conclusion

N,N,N’,N”,N”-pentamethyldipropylene triamine, as a multifunctional catalyst, has wide application prospects in polyurethane production. Its excellent catalytic properties, stable chemical properties and good environmental protection properties make it an ideal choice for polyurethane formulations. Through reasonable use and strict safety and environmental protection measures, pentamethyldipropylene triamine can not only improve the performance of polyurethane products, but also reduce environmental pollution and contribute to sustainable development.

I hope this article can provide readers with a comprehensive and in-depth understanding, helping them select the right catalyst in polyurethane production, and improve production efficiency and product quality.

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N,N-dimethylcyclohexylamine: Catalyst selection from a green chemical perspective

3月 11th, 2025 News

N,N-dimethylcyclohexylamine: Catalyst selection from a green chemical perspective

Introduction

In today’s chemical industry, green chemistry has become an important research direction. Green chemistry is designed to reduce or eliminate the negative impact on the environment and human health during the production and use of chemicals. N,N-dimethylcyclohexylamine (N,N-Dimethylcyclohexylamine, referred to as DMCHA) is an important organic compound and is widely used in catalysts, solvents and intermediates. This article will discuss the application of DMCHA in catalyst selection from the perspective of green chemistry, and introduce its product parameters, application fields and environmental impact in detail.

1. Basic properties of N,N-dimethylcyclohexylamine

1.1 Chemical structure

N,N-dimethylcyclohexylamine is a cyclic amine compound with its chemical structure as follows:

 CH3
       |
  C6H11-N-CH3

Where C6H11 represents cyclohexyl, N represents nitrogen atom, and CH3 represents methyl.

1.2 Physical Properties

parameters value
Molecular formula C8H17N
Molecular Weight 127.23 g/mol
Boiling point 160-162°C
Melting point -50°C
Density 0.85 g/cm³
Flashpoint 40°C
Solution Solved in water and organic solvents

1.3 Chemical Properties

DMCHA is alkaline and can react with acid to form salts. In addition, it can also participate in various organic reactions as a nucleophilic reagent, such as alkylation, acylation, etc.

2. Catalyst selection from the perspective of green chemistry

2.1 Green Chemistry Principles

The 12 principles of green chemistry include:

  1. Prevent waste production
  2. Atomic Economy
  3. Reduce the use of hazardous substances
  4. Design safer chemicals
  5. Use safer solvents and reaction conditions
  6. Improving energy efficiency
  7. Use renewable raw materials
  8. Reduce the use of derivatives
  9. Using catalysts
  10. Designing degradable chemicals
  11. Real-time analysis to prevent contamination
  12. Reduce the risk of accidents

2.2 Advantages of DMCHA as a catalyst

DMCHA has the following advantages in catalyst selection:

  1. High efficiency: DMCHA, as a catalyst, can significantly improve the reaction rate and selectivity.
  2. Environmentally friendly: DMCHA is low in toxicity and is easy to recycle and reuse after reaction.
  3. Veriofunction: DMCHA can be used in a variety of organic reactions, such as esterification, amidation, etc.

2.3 Application Example

2.3.1 Esterification reaction

In the esterification reaction, DMCHA as a catalyst can significantly increase the reaction rate and product yield. For example, reaction with the formation of ethyl ester catalysis under DMCHA:

CH3COOH + C2H5OH ? CH3COOC2H5 + H2O
Catalyzer Reaction time (h) Product yield (%)
DMCHA 2 95
Catalyzer-free 6 60

2.3.2 Amidation reaction

DMCHA also exhibits excellent catalytic properties in the amidation reaction. For example, the reaction of benzoic acid and ammonia catalyzed by DMCHA:

C6H5COOH + NH3 ? C6H5CONH2 + H2O
Catalyzer Reaction time (h) Product yield (%)
DMCHA 3 90
Catalyzer-free 8 50

3. DMCHA product parameters

3.1 Industrial DMCHA

parameters value
Purity ?99%
Appearance Colorless transparent liquid
Moisture ?0.1%
Acne ?0.1 mg KOH/g
Heavy Metal Content ?10 ppm

3.2 Pharmaceutical-grade DMCHA

parameters value
Purity ?99.5%
Appearance Colorless transparent liquid
Moisture ?0.05%
Acne ?0.05 mg KOH/g
Heavy Metal Content ?5 ppm

4. Application areas of DMCHA

4.1 Chemical Industry

DMCHA is widely used in catalysts, solvents and intermediates in the chemical industry. For example, in the production of polyurethane foams, DMCHA as a catalyst can significantly improve the reaction rate and product quality.

4.2 Pharmaceutical Industry

In the pharmaceutical industry, DMCHA is used to synthesize a variety of drug intermediates. For example, in the production of antibiotics, DMCHA can be used as a catalyst to improve the selectivity of the reaction and product yield.

4.3Agriculture

In agriculture, DMCHA is used to synthesize pesticides and herbicides. For example, in the production of herbicides, DMCHA can be used as a catalyst to increase the reaction rate and product yield.

5. Environmental Impact of DMCHA

5.1 Toxicity

DMCHA is less toxic, but may still cause irritation to the skin and eyes at high concentrations. Therefore, when using DMCHA, appropriate protective measures should be taken.

5.2 Biodegradability

DMCHA is prone to biodegradation in the environment and does not have a long-term impact on the ecosystem.

5.3 Waste treatment

DMCHA is easy to recycle and reuse after reaction, reducing waste generation. In addition, the waste disposal of DMCHA is also relatively simple and can be treated by incineration or biodegradation.

6. Conclusion

N,N-dimethylcyclohexylamine, as an important organic compound, has significant advantages in catalyst selection from the perspective of green chemistry. Its efficiency, environmental friendliness and versatility make it widely used in the chemical industry, pharmaceutical industry and agriculture. Through the rational selection and use of DMCHA, the negative impact on the environment and human health during the production and use of chemicals can be effectively reduced, and the development of green chemistry can be promoted.

Appendix

Appendix A: Synthesis method of DMCHA

DMCHA synthesis methods mainly include the following:

  1. Reaction of cyclohexylamine and formaldehyde: Cyclohexylamine and formaldehyde react under acidic conditions to form DMCHA.
  2. Cyclohexanone and di: Cyclohexanone and di react under reduced conditions to form DMCHA.
  3. Cyclohexanol and di: Cyclohexanol and di react under dehydration conditions to form DMCHA.

Appendix B: DMCHA’s safety data sheet

parameters value
Flashpoint 40°C
Spontaneous ignition temperature 250°C
Explosion Limit 1.1-7.0%
Toxicity Low toxic
Protective Measures Wear gloves and goggles

Appendix C: Storage and Transport of DMCHA

parameters value
Storage temperature 0-30°C
Storage container Stainless steel or glass container
Transportation conditions Avoid high temperatures and direct sunlight

Through the above content, we have a comprehensive understanding of the catalyst selection and application of N,N-dimethylcyclohexylamine from the perspective of green chemistry. I hope this article can provide valuable reference for research and application in related fields.

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