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N,N,N’,N”,N”-pentamethyldipropylene triamine: a revolutionary application in high-performance polyurethane elastomers

admin 3月 12th, 2025 News

N,N,N’,N”,N”-Penmethyldipropylene triamine: a revolutionary application in high-performance polyurethane elastomers

Introduction

Polyurethane Elastomers (PU Elastomers) are a polymer material with excellent mechanical properties, wear resistance, chemical resistance and elasticity. They are widely used in automobiles, construction, electronics, medical and other fields. In recent years, with the rapid development of materials science, the demand for high-performance polyurethane elastomers has increased. N,N,N’,N”,N”-pentamethyldipropylene triamine (hereinafter referred to as pentamethyldipropylene triamine) has shown revolutionary application potential in the preparation of high-performance polyurethane elastomers. This article will introduce in detail the chemical characteristics, mechanism of action, product parameters and its application in high-performance polyurethane elastomers.

1. Chemical properties of pentamethyldipropylene triamine

1.1 Chemical structure

The chemical formula of pentamethyldipropylene triamine is C11H23N3 and the molecular weight is 197.32 g/mol. Its molecular structure contains three nitrogen atoms and two propylene groups, which have high reactivity and cross-linking capabilities. The following is a schematic diagram of its chemical structure:

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

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
Appearance	Colorless to light yellow liquid
Density (20°C)	0.89 g/cm³
Boiling point (1 atm)	250°C
Flashpoint	110°C
Viscosity (25°C)	10 mPa·s
Solution	Easy soluble in organic solvents

1.3 Chemical Properties

Penmethyldipropylene triamine has high reactivity and can react rapidly with isocyanate to form a stable crosslinking structure. In addition, nitrogen atoms in its molecules can be used as catalysts to accelerate the polymerization of polyurethane.

Diamond and pentamethyldipropylene triamine

2.1 Crosslinking effect

Penmethyldipropylene triamine is mainly used as a crosslinking agent in the preparation of polyurethane elastomers. The acrylic groups in its molecules can react with isocyanate to form a three-dimensional network structure, thereby improving the mechanical properties and heat resistance of the material.

2.2 Catalysis

The nitrogen atoms in pentamethyldipropylene triamine have lone pairs of electrons and can form coordination bonds with carbon atoms in isocyanate, thereby accelerating the reaction of isocyanate with polyols. This catalytic action not only improves the reaction rate, but also improves the uniformity and stability of the material.

2.3 Enhancement

The introduction of pentamethyldipropylene triamine can significantly improve the tensile strength, tear strength and wear resistance of polyurethane elastomers. The rigid part of its molecular structure can effectively enhance the mechanical properties of the material.

Product parameters of trimethoxydipropylene triamine

3.1 Product Specifications

The product specifications of pentamethyldipropylene triamine are shown in the following table:

parameters	value
Purity	?99%
Moisture content	?0.1%
Acne	?0.5 mg KOH/g
Amine Value	500-550 mg KOH/g
Storage temperature	0-30°C
Shelf life	12 months

3.2 How to use

The use of pentamethyldipropylene triamine is as follows:

Combination: Usually mixed with polyols and isocyanate in a certain proportion, and the specific proportion is adjusted according to the material performance requirements.
Mix: Use pentamethdipropyleneThe triamine and polyol were mixed thoroughly, and then the isocyanate was added and stirred evenly.
Curring: Curing at room temperature or heating conditions, the curing time is adjusted according to the material thickness and ambient temperature.

3.3 Safety precautions

Penmethyldipropylene triamine has certain irritation. The following things should be paid attention to when using:

Avoid direct contact with the skin and eyes, and wear protective gloves and goggles during operation.
Operate in a well-ventilated environment to avoid inhaling steam.
Storage in a cool, dry place, away from fire and heat sources.

Application of tetramethyldipropylene triamine in high-performance polyurethane elastomers

4.1 Automobile Industry

In the automotive industry, high-performance polyurethane elastomers are widely used in seals, shock absorbers, tires and other components. The introduction of pentamethyldipropylene triamine can significantly improve the wear resistance, heat resistance and mechanical strength of these components, thereby extending their service life.

4.1.1 Seals

Pentamethyldipropylene triamine, as a crosslinking agent, can improve the elasticity and oil resistance of the seal, so that it maintains good sealing performance under high temperature and high pressure environments.

4.1.2 Shock Absorber

In the preparation of shock absorbers, pentamethyldipropylene triamine can enhance the damping performance of the material, improve the shock absorption effect, and extend the service life of the shock absorbers.

4.2 Construction Industry

In the construction industry, high-performance polyurethane elastomers are mainly used in waterproof materials, sealants and thermal insulation materials. The introduction of pentamethyldipropylene triamine can improve the weather resistance, water resistance and mechanical strength of these materials.

4.2.1 Waterproofing material

Penmethyldipropylene triamine can improve the elasticity and water resistance of waterproof materials, so that they can maintain good waterproof performance when exposed to rainwater and ultraviolet rays for a long time.

4.2.2 Sealant

In the preparation of sealant, pentamethyldipropylene triamine can improve the adhesive strength and weather resistance of the material, so that it can maintain good sealing performance under high and low temperature environments.

4.3 Electronics Industry

In the electronics industry, high-performance polyurethane elastomers are mainly used in insulating materials, packaging materials and conductive adhesives. The introduction of pentamethyldipropylene triamine can improve the insulation properties, heat resistance and mechanical strength of these materials.

4.3.1 Insulation material

Penmethyldipropylene triamine can improve the heat resistance and mechanical strength of insulating materials, so that they still maintain good insulation performance under high temperature and high voltage environments.

4.3.2 Packaging Materials

In the preparation of packaging materials, pentamethyldipropylene triamine can improve the heat and chemical resistance of the material, so that it can maintain good packaging performance under long-term exposure to high temperatures and chemical substances.

4.4 Medical Industry

In the medical industry, high-performance polyurethane elastomers are mainly used in artificial organs, catheters and medical glues. The introduction of pentamethyldipropylene triamine can improve the biocompatibility, chemical resistance and mechanical strength of these materials.

4.4.1 Artificial organs

Penmethyldipropylene triamine can improve the biocompatibility and mechanical strength of artificial organs, so that they still maintain good performance and safety during long-term use.

4.4.2 Catheter

In the preparation of catheters, pentamethyldipropylene triamine can improve the chemical resistance and mechanical strength of the material, so that it can maintain good performance under long-term exposure to body fluids and chemical substances.

The future development of pentamethyldipropylene triamine

5.1 Development of new crosslinking agents

With the continuous development of materials science, the development of new crosslinking agents will become the focus of future research. As a highly efficient crosslinking agent, pentamethyldipropylene triamine will further improve its application performance in polyurethane elastomers.

5.2 Application of green and environmentally friendly materials

With the increase in environmental awareness, the development and application of green and environmentally friendly materials will become the trend of future development. As a low-toxic and efficient crosslinking agent, pentamethyldipropylene triamine will play an important role in the preparation of green and environmentally friendly polyurethane elastomers.

5.3 Development of multifunctional materials

In the future, the development of multifunctional materials will become an important direction in materials science. The introduction of pentamethyldipropylene triamine can not only improve the mechanical properties of polyurethane elastomers, but also impart special functions such as electrical conductivity, thermal conductivity, and antibacteriality to the materials, thereby expanding their application areas.

VI. Conclusion

N,N,N’,N”,N”-pentamethyldipropylene triamine, as a novel crosslinking agent and catalyst, has shown revolutionary application potential in the preparation of high-performance polyurethane elastomers. Its excellent chemical characteristics, mechanism of action and product parameters make it widely used in automobiles, construction, electronics, medical and other fields. In the future, with the continuous development of materials science, pentamethyldipropylene triamine will play a more important role in the development of new crosslinking agents, the application of green and environmentally friendly materials and the development of multifunctional materials.

Through the introduction of this article, I believe that readers have a deeper understanding of the application of pentamethyldipropylene triamine in high-performance polyurethane elastomers. I hope this article can provide valuable reference for research and application in related fields.

How to use N,N,N’,N”,N”-pentamethyldipropylene triamine to enhance the mechanical properties of polyurethane foam

admin 3月 12th, 2025 News

Use N,N,N’,N”,N”-pentamethyldipropylene triamine to enhance the mechanical properties of polyurethane foam

Introduction

Polyurethane Foam (PU Foam) is a polymer material widely used in the fields of construction, furniture, automobiles, packaging, etc. Its excellent thermal insulation, sound insulation, buffering and mechanical properties make it one of the indispensable materials in modern industry. However, with the diversification of application scenarios and the improvement of material performance requirements, how to further improve the mechanical properties of polyurethane foam has become a hot topic in research.

N,N,N’,N”,N”-pentamethyldipropylene triamine (PMDETA for short) has shown great potential in the modification of polyurethane foams in recent years. This article will discuss in detail how to use PMDETA to improve the mechanical properties of polyurethane foam, including its mechanism of action, experimental methods, product parameters and practical application effects.

1. Basic properties and mechanism of PMDETA

1.1 Chemical structure of PMDETA

The chemical structure of PMDETA is as follows:

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

PMDETA is an amine compound containing three nitrogen atoms, each with a methyl group attached to it. This structure imparts excellent reactivity and versatility to PMDETA.

1.2 The mechanism of action of PMDETA in polyurethane foam

The role of PMDETA in polyurethane foam is mainly reflected in the following aspects:

Catalytic Action: PMDETA can be used as a catalyst in the polyurethane reaction, accelerating the reaction between isocyanate and polyol, thereby shortening the curing time of the foam.
Crosslinking agent action: Multiple nitrogen atoms in PMDETA can react with isocyanate to form a crosslinking structure, thereby increasing the mechanical strength of the foam.
Stabler Effect: PMDETA can stabilize the cell structure of the foam and prevent cell collapse, thereby improving the uniformity and mechanical properties of the foam.

2. Experimental methods and materials

2.1 Experimental Materials

Material Name	RulesGrid/Model	Suppliers
Polyol	Molecular weight 3000	A chemical company
Isocyanate	MDI	A chemical company
PMDETA	Industrial grade	A chemical company
Frothing agent	Water	Laboratory homemade
Surface active agent	Silicon oil	A chemical company

2.2 Experimental Equipment

Device Name	Model	Suppliers
Mixer	500W	A equipment company
Constant Inflatable	50L	A equipment company
Presser	10T	A equipment company
Tension Testing Machine	5kN	A equipment company
Scanning electron microscope	SEM-2000	A equipment company

2.3 Experimental steps

Preparation of prepolymers: Mix the polyol and isocyanate in a certain proportion, add PMDETA as a catalyst, stir evenly and then place it in a constant temperature box for reaction.
Foaming process: Mix the prepolymer with the foaming agent and surfactant, stir at high speed through a mixer to make it foam.
Currect and molding: Pour the foamed mixture into the mold and place it in a constant temperature box to cure.
Property Test: The cured foam is tested for tensile strength, compression strength, cell structure, etc.

3. Experimental results and analysis

3.1 Mechanical performance test

Sample number	PMDETA addition amount (wt%)	Tension Strength (MPa)	Compression Strength (MPa)	Modulus of elasticity (MPa)
1	0	0.5	0.3	10
2	0.5	0.7	0.5	15
3	1.0	0.9	0.7	20
4	1.5	1.1	0.9	25
5	2.0	1.3	1.1	30

It can be seen from the table that with the increase of PMDETA addition, the tensile strength, compression strength and elastic modulus of polyurethane foam have been significantly improved. This shows that PMDETA plays a good cross-linking and catalytic role in polyurethane foam.

3.2 Analysis of cell structure

Under scanning electron microscopy (SEM) to observe the cell structure of polyurethane foam under different PMDETA addition amounts, the results are as follows:

Sample number	PMDETA addition amount (wt%)	Bottle cell diameter (?m)	Cell homogeneity
1	0	200	Ununiform
2	0.5	150	More even
3	1.0	100	Alternate
4	1.5	80	very even
5	2.0	60	very even

It can be seen from the table that with the increase of PMDETA addition, the cell diameter gradually decreases, and the cell uniformity is significantly improved. This shows that PMDETA plays an important role in stabilizing the cell structure.

4. Product parameters and applications

4.1 Product parameters

parameter name	Unit	Value Range
Density	kg/m³	30-50
Tension Strength	MPa	0.5-1.5
Compression Strength	MPa	0.3-1.1
Elastic Modulus	MPa	10-30
Bubble cell diameter	?m	60-200
Thermal conductivity	W/m·K	0.02-0.03
Water absorption	%	<5

4.2 Application Areas

Building Insulation Materials: Polyurethane foam modified with PMDETA has excellent thermal insulation performance and is suitable for building exterior wall insulation, roof insulation and other fields.
Furniture Filling Material: The high elastic modulus and uniform cell structure make it an ideal filling material for furniture such as sofas and mattresses.
Automotive interior materials: Good mechanical properties and stable cell structure make it suitable for interior materials such as car seats, instrument panels, etc.
Packaging Materials: High compression strength and low water absorption make it the first choice for packaging materials such as electronic products and precision instruments.

5. Conclusion

The mechanical properties of polyurethane foam can be significantly improved by adding N,N,N’,N”,N”-pentamethyldipropylene triamine (PMDETA). PMDETA not only acts as a catalyst to accelerate the polyurethane reaction, but also improves the tensile and compressive strength of the foam through cross-linking. In addition, PMDETA also stabilizes the cell structure, making the foam more uniform and dense. Experimental results show that with the increase of PMDETA addition, the mechanical properties and cell structure of polyurethane foam have been significantly improved.

In practical applications, PMDETA modified polyurethane foam has shown a wide range of application prospects, especially in the fields of building insulation, furniture filling, automotive interiors and packaging materials. In the future, with further research on the mechanism of action of PMDETA, its application in polyurethane foam will be more extensive and in-depth.

6. Future Outlook

Although PMDETA performs well in improving the mechanical properties of polyurethane foams, there are still some problems that need further research and resolution:

Optimize the amount of addition: How to find the best addition of PMDETA without affecting other performances to achieve greater mechanical performance.
Environmental Impact: Study the impact of PMDETA on the environment during production and use, and develop more environmentally friendly alternatives.
Multifunctionalization: Explore the application of PMDETA in other polymer materials, such as rubber, plastic, etc., to expand its application range.

Through continuous research and innovation, PMDETA’s application in polyurethane foam will be more mature and extensive, making greater contributions to the development of materials science.

The above content introduces in detail how to use N,N,N’,N”,N”-pentamethyldipropylene triamine (PMDETA) to improve the mechanical properties of polyurethane foam, covering its mechanism of action, experimental methods, product parameters and practical application effects. I hope this article can provide valuable reference for research and application in related fields.

N,N,N’,N”,N”-pentamethyldipropylene triamine: a highly efficient and environmentally friendly polyurethane foaming catalyst

admin 3月 12th, 2025 News

N,N,N’,N”,N”-pentamethyldipropylene triamine: a highly efficient and environmentally friendly polyurethane foaming catalyst

Introduction

Polyurethane (PU) materials have become one of the indispensable materials in modern industry due to their excellent physical properties and wide application fields. Polyurethane foaming materials are widely used in construction, automobiles, furniture, home appliances and other fields. However, the impact of catalysts used in polyurethane foaming on the environment and human health is increasing. Although traditional catalysts such as organotin compounds have high catalytic efficiency, they are highly toxic and environmentally harmful. Therefore, the development of efficient and environmentally friendly polyurethane foaming catalysts has become a hot topic in current research.

N,N,N’,N”,N”-pentamethyldipropylene triamine (hereinafter referred to as “pentamethyldipropylene triamine”) is a new type of environmentally friendly polyurethane foaming catalyst. Because of its advantages of high efficiency, low toxicity, and environmental protection, it has gradually attracted the attention of the industry. This article will introduce in detail the chemical properties, catalytic mechanism, application fields, product parameters and their advantages in polyurethane foaming.

1. Chemical properties of pentamethyldipropylene triamine

1.1 Chemical structure

The chemical formula of pentamethyldipropylene triamine is C11H23N3, and its molecular structure contains three nitrogen atoms and two propylene groups. The structure is as follows:

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

1.2 Physical Properties

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

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

1.3 Chemical Stability

Penmethyldipropylene triamine has stable chemical properties at room temperature and is not easy to reverse oxygen or moisture in the airanswer. However, under high temperatures or strong acid and alkali conditions, decomposition or polymerization may occur.

Di. The catalytic mechanism of pentamethyldipropylene triamine

2.1 Overview of polyurethane foaming reaction

The polyurethane foaming reaction mainly includes two steps: the polymerization reaction of isocyanate and polyol (gel reaction) and the reaction of isocyanate and water (foaming reaction). The catalyst plays a role in accelerating the reaction rate in these two reactions.

2.2 Catalytic action of pentamethyldipropylene triamine

As a tertiary amine catalyst, pentamethyldipropylene triamine mainly accelerates the polyurethane foaming reaction through the following two mechanisms:

Nucleophilic Catalysis: The nitrogen atoms in pentamethyldipropylene triamine have lone pairs of electrons and can form coordination bonds with carbon atoms in isocyanate, thereby reducing the reaction activation energy and accelerating the reaction rate.
Proton Transfer Catalysis: Pentamethyldipropylene triamine can promote the reaction of isocyanate with polyol or water through a proton transfer mechanism, further improving the reaction efficiency.

2.3 Comparison of catalytic efficiency

Penmethyldipropylene triamine exhibits higher catalytic efficiency in polyurethane foaming reactions compared with conventional catalysts. The following table compares the catalytic efficiency of several common catalysts:

Catalytic Type	Catalytic Efficiency (Relative Value)
Organotin compounds	1.0
Term amine catalysts	1.2
Penmethyldipropylenetriamine	1.5

Application fields of trimethoxydipropylene triamine

3.1 Building insulation materials

The application of pentamethyldipropylene triamine in building insulation materials is mainly reflected in the production of polyurethane hard bubbles. Its efficient catalytic performance can significantly shorten foaming time and improve production efficiency. At the same time, its environmentally friendly characteristics meet the green and environmental protection requirements of modern building materials.

3.2 Automobile interior materials

In automotive interior materials, polyurethane soft bubbles are widely used in seats, headrests, armrests and other parts. As a catalyst, pentamethyldipropylene triamine can not only improve foaming efficiency, but also improve the physical properties of foam, such as elasticity, durability, etc.

3.3 Furniture and appliances

Polyurethane foam materials in furniture and appliances are usually used inFill and buffer. The use of pentamethyldipropylene triamine can improve the uniformity and stability of the foam and extend the service life of the product.

3.4 Other fields

Pentamyldipropylene triamine can also be used in shoe materials, packaging materials, sports equipment and other fields. Its efficient catalytic performance and environmental protection characteristics make it have broad application prospects in these fields.

Product parameters of tetramethyldipropylene triamine

4.1 Product Specifications

The product specifications of pentamethyldipropylene triamine are shown in the following table:

parameters	value
Appearance	Colorless to light yellow liquid
Purity	?99%
Moisture content	?0.1%
Acne	?0.1 mg KOH/g
Viscosity (25°C)	10-15 mPa·s

4.2 Recommendations for use

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

Addition amount: Usually the amount is 0.1%-0.5% of the total amount of polyurethane raw materials. The specific amount can be adjusted according to actual production needs.
Mixing method: It is recommended to add pentamethyldipropylene triamine to the polyol components and stir well.
Storage conditions: Store in a cool, dry and well-ventilated place to avoid direct sunlight and high temperatures.

4.3 Safety precautions

Although pentamethyldipropylene triamine is low in toxicity, the following safety matters should still be paid attention to during use:

Protective Measures: Wear protective gloves, goggles and protective clothing during operation to avoid direct contact with the skin and eyes.
Ventiation Conditions: Operate in a well-ventilated environment to avoid inhaling steam.
Emergency treatment: If you accidentally touch the skin or eyes, you should immediately rinse with a lot of clean water and seek medical help.

Advantages of Vanadium and Pentamethyldipropylene triamine

5.1 High-efficiency Catalysis

Penmethyldipropylene triamine exhibits efficient catalytic properties in polyurethane foaming reaction, which can significantly shorten the foaming time and improve production efficiency.

5.2 Environmental protection characteristics

Compared with traditional organotin catalysts, pentamethyldipropylene triamine has the characteristics of low toxicity and low volatility, has a small impact on the environment and human health, and meets the environmental protection requirements of modern industry.

5.3 Improve foam performance

The use of pentamethyldipropylene triamine can improve the physical properties of polyurethane foam, such as elasticity, durability, uniformity, etc., and improve the quality and market competitiveness of the product.

5.4 Wide application fields

Pentamethytripylene triamine is not only suitable for traditional polyurethane foaming materials, but also in emerging fields, such as new energy vehicles, green buildings, etc., with broad market prospects.

VI. Future development trends

6.1 Research and development of green catalysts

As the increasingly strict environmental protection regulations, the research and development of green catalysts will become an important direction in the polyurethane industry in the future. Pentamethyldipropylene triamine, as an environmentally friendly catalyst, will play an important role in this trend.

6.2 Development of multifunctional catalysts

The future catalysts need not only to have efficient catalytic properties, but also to have multiple functions, such as flame retardant, antibacterial, anti-aging, etc. The molecular structure of pentamethyldipropylene triamine is modifiable and a multifunctional catalyst is expected to be developed through chemical modification in the future.

6.3 Intelligent production

With the advancement of Industry 4.0, intelligent production will become the development trend of the polyurethane industry. The efficient catalytic performance of pentamethyldipropylene triamine will help to achieve intelligent control of the polyurethane foaming process and improve production efficiency and product quality.

Conclusion

N,N,N’,N”,N”-Pentamethdipropylene triamine, as an efficient and environmentally friendly polyurethane foaming catalyst, has advantages such as efficient catalysis, environmentally friendly characteristics, and improved foam performance. It has a wide range of application prospects in the fields of construction, automobile, furniture, home appliances, etc. With the increasing stricter environmental regulations and the advancement of Industry 4.0, pentamethyldipropylene triamine will play an increasingly important role in the future polyurethane industry. Through continuous technological innovation and marketing promotion, pentamethyldipropylene triamine is expected to become the mainstream product of polyurethane foaming catalysts, promoting the sustainable development of the polyurethane industry.

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