N,N,N’,N”,N”-Penmethyldipropylene triamine: an ideal low-odor polyurethane production solution
Introduction
Polyurethane (PU) is a multifunctional polymer material widely used in the fields of construction, automobile, furniture, footwear, packaging, etc. Its excellent physical properties, chemical stability and processing flexibility make it one of the indispensable materials in modern industry. However, traditional polyurethane production is often accompanied by the release of volatile organic compounds (VOCs), especially the use of amine catalysts, which often lead to a product with a irritating odor, affecting user experience and environmental performance. To solve this problem, N,N,N’,N”,N”-pentamethyldipropylene triamine (hereinafter referred to as “pentamethyldipropylene triamine”) came into being as a new low-odor catalyst. This article will introduce in detail the characteristics, application advantages, product parameters and their specific applications in polyurethane production.
I. Basic characteristics of pentamethyldipropylene triamine
1.1 Chemical Structure and Naming
The chemical name of pentamethyldipropylene triamine is N,N,N’,N”-pentamethyldipropylene triamine, its molecular formula is C11H23N3 and its molecular weight is 197.32 g/mol. Its chemical structure is as follows:
CH3
|
CH3-N-CH2-CH2-N-CH2-CH2-N-CH3
| |
CH3 CH3Structurally, pentamethyldipropylene triamine is a triamine compound with three nitrogen atoms and five methyl groups. This structure imparts its unique catalytic properties and low odor properties.
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/Description |
|---|---|
| Appearance | Colorless to light yellow liquid |
| Density (20°C) | 0.89 g/cm³ |
| Boiling point | 220-230°C |
| Flashpoint | 110°C |
| Solution | Easy soluble in organic solvents such as water, alcohols, ethers |
| odor | Low odor |
1.3 Chemical Properties
Penmethyldipropylene triamine, as an amine catalyst, has the following chemical properties:
- Basicity: Pentamethyldipropylene triamine is highly alkaline and can effectively catalyze the reaction between isocyanate and polyol and promote the formation of polyurethane.
- Stability: At room temperature, pentamethyldipropylene triamine has good chemical stability and is not easy to decompose or oxidize.
- Low Volatility: Due to its higher boiling point and lower volatility, pentamethyldipropylene triamine releases less VOCs during the polyurethane production process, thereby reducing the odor of the product.
The application advantages of 2. Pentamethyldipropylene triamine in polyurethane production
2.1 Low odor characteristics
Traditional amine catalysts, such as triethylamine (TEA) and dimethylamine (DMEA), often release irritating odors during the polyurethane production process, affecting the working environment and the user experience of the final product. Due to its low volatility and low odor properties, pentamethyldipropylene triamine can significantly reduce the release of VOCs, thereby improving the production environment and improving the environmental performance of the product.
2.2 High-efficiency catalytic performance
Penmethyldipropylene triamine has high efficiency catalytic properties, which can significantly accelerate the reaction rate between isocyanate and polyol and shorten the curing time of polyurethane. Its catalytic efficiency is comparable to that of traditional amine catalysts, and even performs better in some applications. The following table compares the catalytic properties of pentamethyldipropylene triamine with several common catalysts:
| Catalyzer | Catalytic Efficiency | Odor intensity | Volatility |
|---|---|---|---|
| Penmethyldipropylenetriamine | High | Low | Low |
| Triethylamine (TEA) | High | High | High |
| Dimethylamine (DMEA) | in | in | in |
| Dimethylcyclohexylamine (DMCHA) | High | in | in |
2.3 Wide applicability
Pentamethyldipropylene triamine is not only suitable for the production of traditional polyurethane foam, but also for the production of a variety of polyurethane products such as high resilience foam, rigid foam, coatings, adhesives, etc. Its wide applicability makes it a multifunctional catalyst in the polyurethane industry.
2.4 Environmental performance
As the increasingly stringent environmental regulations, the VOCs emissions in the polyurethane production process are attracting more and more attention. The low volatility and low odor properties of pentamethyldipropylene triamine make it an environmentally friendly catalyst, which can help enterprises meet the requirements of environmental protection regulations and enhance the market competitiveness of their products.
Product parameters of trimethoxydipropylene triamine
To help users better understand and use pentamethyldipropylene triamine, the following table lists its main product parameters:
| parameters | Value/Description |
|---|---|
| Chemical Name | N,N,N’,N”,N”-pentamethyldipropylenetriamine |
| Molecular formula | C11H23N3 |
| Molecular Weight | 197.32 g/mol |
| Appearance | Colorless to light yellow liquid |
| Density (20°C) | 0.89 g/cm³ |
| Boiling point | 220-230°C |
| Flashpoint | 110°C |
| Solution | Easy soluble in organic solvents such as water, alcohols, ethers |
| odor | Low odor |
| Storage Conditions | Cool, dry and ventilated places to avoid direct sunlight |
| Packaging Specifications | 25 kg/barrel, 200 kg/barrel |
| Shelf life | 12 months |
Special application of tetramethyldipropylene triamine in polyurethane production
4.1 PolyamideEster foam production
Polyurethane foam is one of the main application areas of pentamethyldipropylene triamine. In soft foam production, pentamethyldipropylene triamine can effectively catalyze the reaction of isocyanate with polyols, promoting the formation and curing of foam. Its low odor characteristics make the final product more environmentally friendly and suitable for application scenarios such as furniture and mattresses that require high odor.
Penmethyldipropylene triamine also exhibits excellent catalytic properties in rigid foam production. Its efficient catalytic action can shorten the curing time of foam and improve production efficiency. At the same time, its low volatility reduces VOCs emissions during the production process and meets environmental protection requirements.
4.2 Polyurethane coating
Polyurethane coatings are widely used in construction, automobile, furniture and other fields. Traditional amine catalysts often release irritating odors during the coating production process, affecting the construction environment of the coating and the quality of the final coating. The low odor properties of pentamethyldipropylene triamine make it an ideal catalyst for the production of polyurethane coatings, which can significantly improve the construction environment and improve the environmental protection performance of the coatings.
4.3 Polyurethane Adhesive
Polyurethane adhesives are widely used in packaging, footwear, automobiles and other fields. Pentamethyldipropylene triamine can effectively catalyze the reaction between isocyanate and polyol in the production of adhesives, and promote the curing of adhesives. Its low odor properties make the adhesive more environmentally friendly during use and are suitable for occasions that are sensitive to odors.
4.4 Other applications
In addition to the above application fields, pentamethyldipropylene triamine can also be used in the production of polyurethane elastomers, sealants, waterproof materials and other products. Its efficient catalytic properties and low odor properties make it equally excellent in these areas.
Suggestions on the use of pentamethyldipropylene triamine
5.1 Addition amount
The amount of pentamethyldipropylene triamine added should be adjusted according to the specific application scenario and formula. Generally speaking, the amount of addition is 0.1%-1.0% of the total amount of polyurethane formulation. The specific amount of addition can be determined experimentally to achieve optimal catalytic effect and product performance.
5.2 Storage and Transport
Penmethyldipropylene triamine should be stored in a cool, dry and ventilated place to avoid direct sunlight. During transportation, severe vibration and high-temperature environments should be avoided to prevent product leakage or deterioration.
5.3 Safety precautions
Pentamethyldipropylene triamine, as an amine compound, has certain irritability. During use, direct contact with the skin and eyes should be avoided, and protective gloves and goggles should be worn during operation. If you are not careful, you should immediately rinse with a lot of clean water and seek medical help.
VI. Conclusion
N,N,N’,N”,N”-pentamethyldipropylene triamine, as a novel low-odor catalyst, has performed excellently in polyurethane productioncatalytic properties and environmentally friendly properties. Its low volatility and low odor properties make it an ideal alternative to traditional amine catalysts, which can significantly improve the production environment and improve the environmental performance of the product. With the increasing stricter environmental regulations and the increasing demand for environmentally friendly products from consumers, the application prospects of pentamethyldipropylene triamine in the polyurethane industry will be broader.
Through the introduction of this article, I believe that readers have a deeper understanding of the characteristics, application advantages, product parameters and their specific applications in polyurethane production. I hope this article can provide valuable reference for polyurethane manufacturers and related practitioners to promote the sustainable development of the polyurethane industry.
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