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Polyurethanes, which are polymers containing urethane groups in the macromolecular backbone, are called polyurethanes, or polyurethanes for short. Polyurethanes are divided into polyester polyurethanes and polyether polyurethanes. Polyester type is polyurethane prepared from diisocyanate and hydroxyl-terminated polyester. Polyether polyurethanes are polyurethanes prepared from diisocyanates and hydroxyl-terminated polyethers.
1. higher mechanical strength and oxidation stability;
2. has a high flexibility and elasticity;
3. has excellent oil resistance, solvent resistance, water resistance and fire resistance.
Polyurethane is mainly used for polyurethane synthetic leather, polyurethane foam, polyurethane coating, polyurethane adhesive, polyurethane rubber (elastomer) and polyurethane fiber. In addition, polyurethane is also used in civil engineering, address drilling, mining and petroleum engineering to act as a water stop, a stable building or roadbed; as a paving material, a runway for a sports field, an indoor floor of a building, and the like.
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