POLYESTER, POLYURETHANE, ELASTOMER, METHOD FOR PRODUCING POLYESTER, AND METHOD FOR PRODUCING POLYURETHANE
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP3165551A1
公开(公告)日:2017-05-10
Provided is a starting material for polyurethanes having excellent hydrolysis resistance and heat resistance, especially heat aging resistance. Further provided is polyurethanes and elastomers obtained by using the polyesters, as well as processes for manufacturing the polyesters and processes for manufacturing the polyurethanes. The polyester contains one or more types of repeating unit represented by formula [I] below, wherein 70% or more of a terminal group thereof is hydroxyl group,or 70% or more of a terminal group thereof is carboxyl groups;wherein R1 , R2, R3 and R4 each independently represent an aliphatic hydrocarbon group containing 1 to 6 carbon atoms, and A represents a divalent group selected from aliphatic groups, alicyclic groups, and aromatic groups.
本发明提供了一种具有优异耐水解性和耐热性(尤其是耐热老化性)的聚氨酯起始材料。此外,还提供了使用该聚酯获得的聚氨酯和弹性体,以及制造该聚酯的工艺和制造该聚氨酯的工艺。聚酯含有一种或多种下式[I]所代表的重复单元,其中70%或更多的末端基团为羟基,或70%或更多的末端基团为羧基;其中R1、R2、R3和R4各自独立地代表含有1至6个碳原子的脂肪族烃基,A代表选自脂肪族基团、脂环族基团和芳香族基团的二价基团。