Use of plasticizers in polyurethane products

The main functions of the plasticizer are: reduce the viscosity of the material and facilitate mixing; stay in the product, increase the flexibility of the product, increase the elongation, reduce the hardness, and reduce the brittleness; reduce the cost; in the reactive polyurethane system, it can extend the pot life. Lowering the operating temperature of the MOCA solvent can be used for room temperature curing, etc. An appropriate amount of plasticizers with good compatibility can improve product performance, while improper use of plasticizers may damage the performance of polymer materials.

New environmentally friendly plasticizer

Currently, polyurethane foam is widely used. Soft foam plastics are mainly used for various cushioning materials and sound insulation materials for furniture and vehicles; rigid foam plastics are mainly used for household appliances heat insulation layer, roof insulation and waterproof spray foam, pipe insulation materials, building boards, refrigerated vehicles and cold storage Heat insulation materials, etc.; semi-rigid foam plastics are used in automobile dashboards, steering wheels, etc.

There are various types of foam plastic composite materials (two-component premix) on the market, which are mainly used for (cold curing) high resilience foam, semi-rigid foam, casting and spraying rigid foam, etc. Polyurethane elastomer can have high elasticity and strength, excellent wear resistance, oil resistance, fatigue resistance and vibration resistance in a wide range of hardness, and is called "wear-resistant rubber".

Although the output of polyurethane elastomer in polyurethane products is small, polyurethane elastomer has excellent comprehensive properties and has been widely used in metallurgy, petroleum, automobile, mineral processing, water conservancy, textile, printing, medical, sports, food processing, construction and other industrial sectors .

Polyurethane itself can change its hardness by adjusting the composition of raw materials. Plasticizers are mainly used in polyurethane rubber compounds. The purpose of use is to increase the plasticity of the rubber compounds, improve the processing performance and the low temperature performance of the vulcanized rubber, and reduce the hardness of the vulcanized rubber. Tensile strength. The amount of plasticizer should not be too large, otherwise it will reduce the wear resistance of the vulcanizate. Environmentally Friendly Plasticizer

Phthalates can be used in soft elastomers and have excellent migration resistance.

Fatty acid diacid esters have good cold resistance and are mostly used in products requiring low temperature resistance, and can also be used as high temperature lubricants.

Dioctyl terephthalate has good electrical properties and cold resistance, low volatility, higher plasticizing efficiency than DOP, and small volume resistance. It is used for products with high insulation, extraction resistance, heat resistance and flexibility. It is suitable as a plasticizer for polyurethane and polyvinyl chloride resin.