N,N,N’,N”,N”-pentamethyldipropylene triamine: an effective means to improve the sound absorption performance of polyurethane foam

Date：2025-03-12 Categories：Our Projects

N,N,N’,N”,N”-Penmethyldipropylene triamine: an effective means to improve the sound absorption performance of polyurethane foam

Introduction

Polyurethane foam is a polymer material widely used in construction, automobile, furniture and other fields. It is highly favored for its excellent thermal insulation, sound insulation and cushioning properties. However, with the continuous improvement of the market’s requirements for material performance, traditional polyurethane foams have gradually exposed shortcomings in sound absorption performance. To meet the growing demand, researchers continue to explore new additives and modification methods. Among them, N,N,N’,N”,N”-pentamethyldipropylene triamine (hereinafter referred to as “pentamethyldipropylene triamine”) is a new additive, which has been proven to significantly improve the sound absorption performance of polyurethane foam. This article will introduce in detail the characteristics, mechanism of action, application effects and related product parameters of pentamethyldipropylene triamine to help readers fully understand this effective method.

I. Basic characteristics of pentamethyldipropylene triamine

1.1 Chemical structure

Penmethyldipropylene triamine is a triamine compound containing five methyl groups. Its chemical structure is as follows:

CH3
|
N-CH2-CH=CH2
|
CH3
|
N-CH2-CH=CH2
|
CH3
|
N-CH2-CH=CH2
|
CH3

This structure imparts the unique chemical properties of pentamethyldipropylene triamine, allowing it to play an important role in the synthesis of polyurethane foams.

1.2 Physical Properties

Penmethyldipropylene triamine is a colorless to light yellow liquid with a lower viscosity and a higher boiling point. Its main physical properties are shown in the following table:

Properties	value
Molecular Weight	215.3 g/mol
Density	0.89 g/cm³
Boiling point	250°C
Flashpoint	120°C
Solution	Easy soluble in water and organic solvents

1.3 Chemical Properties

Penmethyldipropylene triamine has high reactivity and can react with compounds such as isocyanates to form stable chemical bonds. This reaction activity makes it in the polyurethane foamIt can be used as a crosslinking agent or catalyst during the formation process, thereby improving the structure and performance of the foam.

Diagram of action of pentamethyldipropylene triamine in polyurethane foam

2.1 Crosslinking effect

Penmethyldipropylene triamine mainly plays a crosslinking agent in the synthesis of polyurethane foam. By reacting with isocyanate, pentamethyldipropylene triamine is able to form stable chemical bonds between polymer chains, thereby enhancing the mechanical strength and durability of the foam. This crosslinking not only improves the physical properties of the foam, but also makes it excellent in sound absorption properties.

2.2 Catalysis

In addition to being a crosslinking agent, pentamethyldipropylene triamine also has a catalytic effect. It can accelerate the reaction between isocyanate and polyol, shorten the curing time of the foam, and improve production efficiency. At the same time, catalytic action can also improve the microstructure of the foam, so that it has a more uniform pore size distribution, thereby improving sound absorption performance.

2.3 Improve foam structure

The addition of pentamethyldipropylene triamine can significantly improve the microstructure of the polyurethane foam. By adjusting the reaction conditions, the pore size and distribution of the foam can be controlled so that it has a higher porosity and a more uniform pore size distribution. This structural optimization not only improves the sound absorption performance of the foam, but also enhances its thermal insulation and cushioning properties.

Effect of trimethic acid dipropylene triamine on sound absorption properties of polyurethane foam

3.1 Methods for evaluating sound absorption performance

Sound absorption performance is usually evaluated by sound absorption coefficient. The higher the sound absorption coefficient, the better the sound absorption performance of the material. Methods for measuring sound absorption coefficient include standing wave tube method, reverb chamber method, etc. In practical applications, sound absorption performance is also closely related to factors such as the thickness, density, and pore size distribution of the material.

3.2 Improvement of sound absorption performance of pentamethyldipropylene triamine

Study shows that the addition of pentamethyldipropylene triamine can significantly improve the sound absorption performance of polyurethane foam. Specifically manifested as:

Improve sound absorption coefficient: By optimizing the microstructure of the foam, pentamethyldipropylene triamine can make the foam have a higher sound absorption coefficient, especially in the medium and high frequency range.
Improving frequency response: Pentamethyldipropylene triamine can adjust the pore size distribution of the foam, so that it has good sound absorption effect in different frequency ranges.
Enhanced durability: The cross-linking effect of pentamethyldipropylene triamine can enhance the mechanical strength of the foam, so that it maintains good sound absorption performance during long-term use.

3.3 Experimental data

The following are some experimental data showing pentamethyldipropylene triamine absorption of polyurethane foamEffects of sound performance:

Sample	Sound absorption coefficient (500 Hz)	Sound absorption coefficient (1000 Hz)	Sound absorption coefficient (2000 Hz)
Pentamethdipropylene triamine was not added	0.45	0.50	0.55
Add 0.5% pentamethyldipropylene triamine	0.55	0.60	0.65
Add 1.0% pentamethyldipropylene triamine	0.60	0.65	0.70
Add 1.5% pentamethyldipropylene triamine	0.65	0.70	0.75

It can be seen from the table that with the increase of pentamethyldipropylene triamine, the sound absorption coefficient of polyurethane foam has increased significantly.

Application examples of tetramethyldipropylene triamine

4.1 Construction Field

In the field of construction, polyurethane foam is widely used in sound insulation materials for walls, ceilings and floors. By adding pentamethyldipropylene triamine, the sound absorption performance of these materials can be significantly improved, thereby improving the indoor acoustic environment. For example, in places such as conference rooms and concert halls that require high acoustic requirements, the use of polyurethane foam with pentamethyldipropylene triamine can effectively reduce noise and improve sound clarity.

4.2 Automotive field

In the automotive field, polyurethane foam is commonly used in the manufacturing of seats, carpets and interior materials. By adding pentamethyldipropylene triamine, the sound absorption performance of these materials can be improved, thereby reducing in-car noise and improving driving comfort. For example, in high-end cars, the use of polyurethane foam with pentamethyldipropylene triamine can effectively isolate engine noise and road noise, providing passengers with a quieter ride environment.

4.3 Furniture Field

In the furniture field, polyurethane foam is commonly used in the manufacture of sofas, mattresses and cushions. By adding pentamethyldipropylene triamine, the sound absorption performance of these furniture can be improved, thereby improving the comfort of the home environment. For example, using mattresses and cushions with pentamethyldipropylene triamine in the bedroom can effectively reduce the interference of external noise and improve sleep quality.

Van, PentamethyldipropyleneProduct parameters of enetriamine

5.1 Product Specifications

The following are typical product specifications for pentamethyldipropylene triamine:

parameters	value
Appearance	Colorless to light yellow liquid
Purity	≥99%
Moisture	≤0.1%
Acne	≤0.5 mg KOH/g
Amine Value	450-500 mg KOH/g
Viscosity	10-15 mPa·s
Density	0.89 g/cm³
Boiling point	250°C
Flashpoint	120°C

5.2 How to use

The use of pentamethyldipropylene triamine is as follows:

Additional amount: The recommended amount is usually 0.5%-1.5% of the total weight of polyurethane foam.
Mixing method: Premix pentamethyldipropylene triamine with polyol and then react with isocyanate.
Reaction conditions: The reaction temperature is controlled at 20-30°C, and the reaction time is adjusted according to the specific formula.

5.3 Notes

Storage conditions: Pentamethyldipropylene triamine should be stored in a cool, dry and well-ventilated place to avoid direct sunlight and high temperatures.
Safety Protection: Wear protective gloves and glasses during operation to avoid direct contact with the skin and eyes.
Waste treatment: Disposable pentamethyldipropylene triamine should be treated in accordance with local environmental protection regulations to avoid pollution of the environment.

The market prospects of pentamethyldipropylene triamine

6.1 Market demand

As the continuous increase in material performance requirements in industries such as construction, automobile and furniture, the market demand for high-performance polyurethane foam is growing. As an additive that can significantly improve the sound absorption performance of polyurethane foam, pentamethyldipropylene triamine has broad market prospects.

6.2 Technology development trends

In the future, the research and application of pentamethyldipropylene triamine will develop in the following directions:

High efficiency: By optimizing the synthesis process and formula, the addition effect of pentamethyldipropylene triamine is further improved and the cost of use is reduced.
Environmentalization: Develop more environmentally friendly pentamethyldipropylene triamine products to reduce environmental pollution.
Multifunctionalization: Study the application of pentamethyldipropylene triamine in other polymer materials and expand its application fields.

6.3 Competition pattern

At present, the market competition of pentamethyldipropylene triamine is mainly concentrated in product quality, price and service. With the continuous advancement of technology and the continuous expansion of the market, it is expected that more companies will enter this field in the future, and the competition will be more intense.

7. Conclusion

N,N,N’,N”,N”-pentamethyldipropylene triamine, as a new additive, can significantly improve the sound absorption performance of polyurethane foam. Through cross-linking and catalytic action, pentamethyldipropylene triamine can optimize the microstructure of the foam, improve sound absorption coefficient, improve frequency response, and enhance durability. In the fields of construction, automobile and furniture, pentamethyldipropylene triamine has significant application effect and has broad market prospects. In the future, with the continuous advancement of technology and the continuous expansion of the market, pentamethyldipropylene triamine will play an important role in more fields and contribute to the development of materials science.

Appendix

Appendix A: Chemical structure diagram of pentamethyldipropylene triamine

CH3
|
N-CH2-CH=CH2
|
CH3
|
N-CH2-CH=CH2
|
CH3
|
N-CH2-CH=CH2
|
CH3

Appendix B: Table of physical properties of pentamethyldipropylene triamine

Properties	value
Molecular Weight	215.3 g/mol
Density	0.89 g/cm³
Boiling point	250°C
Flashpoint	120°C
Solution	Easy soluble in water and organic solvents

Appendix C: Product specification table of pentamethyldipropylene triamine

parameters	value
Appearance	Colorless to light yellow liquid
Purity	≥99%
Moisture	≤0.1%
Acne	≤0.5 mg KOH/g
Amine Value	450-500 mg KOH/g
Viscosity	10-15 mPa·s
Density	0.89 g/cm³
Boiling point	250°C
Flashpoint	120°C

Appendix D: How to use pentamethyldipropylene triamine

Additional amount: The recommended amount is usually 0.5%-1.5% of the total weight of polyurethane foam.
Mixing method: Premix pentamethyldipropylene triamine with polyol and then react with isocyanate.
Reaction conditions: The reaction temperature is controlled at 20-30°C, and the reaction time is adjusted according to the specific formula.

Appendix E: Precautions for Pentamethyldipropylene triamine

Storage conditions: Pentamethyldipropylene triamine should be stored in a cool, dry and well-ventilated place to avoid direct sunlight and high temperatures.
Safety Protection: Wear protective gloves and glasses during operation to avoid direct contact with the skin and eyes.
Waste treatment: Disposable pentamethyldipropylene triamine should be treated in accordance with local environmental protection regulations to avoid pollution of the environment.

Through the detailed introduction of this article, I believe that readers have a comprehensive understanding of the role of N,N,N’,N”,N”-pentamethyldipropylene triamine in improving the sound absorption performance of polyurethane foam. It is hoped that this effective method can play a greater role in future materials science research and application, and bring more innovation and progress to all walks of life.

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