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Scope of application of polyurethane materials

发表时间:2022-07-15 访问量:1482

Polyurethane materials are widely used and can be divided into various products according to different processing methods. Today we will talk about one of them - polyurethane plastics.

Polyurethane plastic is an excellent shock-proof, heat-insulating and sound-insulating material. Polyurethane soft foam has good elasticity and is also an ideal material for seat cushions and mattresses. There are three production processes of polyurethane foam: prepolymerization method, semi-prepolymerization method and one-step method. The prepolymerization method is to make an isocyanate-terminated prepolymer with excess isocyanate and polyol polymer first, and then react with the chain extender or the rest of the polyol polymer. The semi-prepolymerization method is similar to the prepolymerization method, only the prepolymer is less reactive.


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