Properties of Polyurethane
Polyurethane has excellent wear resistance, water resistance and chemical resistance, which provides broad development prospects for the development of coatings. The polyurethane coating has strong adhesion, and the paint film has excellent abrasion resistance, water resistance and drug resistance. Mainly used in furniture coatings, building material coatings and industrial printing inks.
Polyurethane has excellent water resistance, oil resistance and chemical resistance, and is used in the development of adhesives. Polyurethane adhesives can adjust the performance of the cured product by adjusting the ratio of isocyanate to polyol, so as to achieve high adhesion to the substrate, excellent water resistance, oil resistance, and chemical resistance. Polyurethane adhesives are widely used because of their excellent properties. Mainly used in packaging, construction, wood, automobile, shoemaking and other industries.
Polyurethane has been widely used in the biomedical field due to its good biocompatibility. It can be used to manufacture medical materials such as artificial cardiac pacemakers, artificial blood vessels, artificial bones, artificial esophagus, artificial kidneys, and artificial dialysis membranes.
Polyurethane products have excellent characteristics such as no scratches, no noise, long service life, temperature resistance from - 20 ℃ to high temperature 120 ℃, no pollution, non-toxic and tasteless, oil resistance, wear resistance, aging resistance, high hardness and good elasticity. It is widely used in home appliances, transportation, construction, furniture and other fields, bringing great convenience to people's lives.
Polyurethane is an excellent insulation material in the world. It has excellent anti-corrosion performance and high temperature resistance performance, which provides great help for the production and development of insulation pipes. The main chain of polyurethane is a polymer containing - nhcoo - repeating structural units, referred to as PU. It is polymerized from isocyanate (monomer) and hydroxyl compound. Since the polar urethane group is strong and insoluble in non-polar groups, it has good oil resistance, toughness, abrasion resistance, aging resistance and adhesion. Materials suitable for a wide temperature range (-50-150°C) can be made from different raw materials, including elastomers, thermoplastic resins and thermosetting resins. It is not resistant to hydrolysis or alkaline media at high temperatures.
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