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Hexamethylphosphoric acid triamide;
Colorless transparent liquid
Hexamethylphosphoramide is an organic solvent with high boiling point and strong polarity with excellent performance. It is also a very valuable chemical reaction medium with catalytic performance. It has important applications in the polymer synthesis industry. Hexamethylphosphoramide has a slightly fishy and astringent taste and is soluble in polar and non-polar solvents. It can be miscible with commonly used plasticizers such as dioctyl phthalate, dioctyl sebacate, and triphenyl phosphite in any ratio. Hexamethylphosphoramide is a light stabilizer of polyvinyl chloride, which makes the products have excellent outdoor anti-aging performance and excellent weather resistance, so it is called polyvinyl chloride efficient weathering agent. Adding 2 to 5 parts of polyvinyl chloride film can not only significantly improve its weather resistance and cold resistance, but also reduce the processing temperature by 10°C. Hexamethylphosphoramide can also be used as an excellent polar solvent for polyphenylene sulfide, polyurethane, polyamide and other polymer materials to improve the quality of the resin, simplify the process and reduce the cost. Hexamethylphosphoramide added to ethylene propylene rubber can improve elasticity and oil resistance. Hexamethylphosphoramide can also be used as a co-catalyst for bulk polymerization of propylene to improve the catalytic efficiency of the main catalyst.
Hexamethylphosphoramide is a new chemical product with a wide range of uses and good performance in recent years. It is widely used in national economic production activities such as rubber, textile printing and dyeing, and aviation reagents. However, the operating conditions during the synthesis process are dangerous. For example, the raw materials used in the synthesis reaction of Hexamethylphosphoramide, such as phosphorus oxychloride and xylene, are highly toxic and flammable. In addition, higher heating temperatures are required in the synthesis reaction process, which can easily cause secondary reactions and cause accidents.
Hexamethylphosphoramide is a weather-resistant solvent and an excellent polar solvent for polyvinyl chloride. It has a significant effect on the low-temperature and anti-aging resistance of agricultural films; it is a multifunctional aprotic and high-boiling polar solvent, used as a solvent for polymer synthesis For example, the synthesis of polyphenylene sulfide and aromatic polyamide has special effects. Hexamethylphosphoramide is used as a co-catalyst for bulk polymerization of propylene. Adding this product to ethylene-propylene rubber can improve elastomer and oil resistance. Hexamethylphosphoric triamide is also used as a gas chromatography stationary liquid, violet light inhibitor, rocket fuel freezing point reduction additive, and chemical sterilant.
Transport and storage
The toxicity of Hexamethylphosphoramide is similar to that of phosphate, so it should avoid contact with skin. The container should be tightly closed to prevent damage, leakage and deterioration of water absorption.