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Non yellow low the hardness polyurethane elastomer formation Characteristic constituent, or the non yellow which uses that the production mannered null plastic medicine
Non yellow low the hardness polyurethane elastomer formation Characteristic constituent, or the non yellow which uses that the production mannered null plastic medicine
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机译:非黄色低硬度聚氨酯弹性体的形成特征成分,或采用生产习惯的废塑料制成的非黄色
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摘要
The present invention provides a thermosetting polyurethane elastomer that is yellowing-free, has low hardness and does not give rise to bleeding without using any plasticizer, has little tack, and exhibits small changes in hardness with temperature. This is achieved by a composition forming a yellowing-free, low-hardness polyurethane elastomer, containing no plasticizer and having (A) an isocyanate-terminated prepolymer and (B) a polyester polyol, wherein the isocyanate-terminated prepolymer (A) is an isocyanate-terminated prepolymer obtained by reacting hexamethylene diisocyanate with a glycol having an alkyl group as a side chain and having a molecular weight no greater than 500, and the polyester polyol (B) is a polyester polyol obtained from trimethylolpropane, 3-methyl-1,5-pentanediol and adipic acid, and having an average number of functional groups of 2.5 to 3.5 and a number average molecular weight of 800 to 5,000.
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