申请人:Mitsubishi Chemical Corporation
公开号:EP3960450A1
公开(公告)日:2022-03-02
A thermoplastic polyurethane resin elastomer is obtained by reacting an isocyanate compound (I), an aliphatic alcohol (II) having a number average molecular weight determined from the hydroxyl value of less than 300 and having only a hydroxyl group as a functional group, and a polyol (III) having a number average molecular weight determined from the hydroxyl value of not less than 300 and not more than 10,000. The isocyanate compound (I) comprises not less than 90 mol% in total of an aliphatic isocyanate compound containing two isocyanate groups and/or an alicyclic isocyanate compound containing two isocyanate groups. The aliphatic alcohol (II) comprises not less than 90 mol% of a C12 or lower aliphatic diol. The polyol (III) comprises not less than 80 mol% of a copolymerized polycarbonate diol (IIIA) including a repeating unit (A) illustrated below and a repeating unit (B) illustrated below. The equivalent ratio represented by hydroxyl equivalent (EIII) of polyol (III):isocyanate equivalent (EI) of isocyanate compound (I):hydroxyl equivalent (EII) of aliphatic alcohol (II) is 1.0:2.0-5.5:1.0-4.5 (with the proviso that 0.95 ≤ (EI) / ((EII) + (EIII)) ≤ 1.05). The number average molecular weight of the copolymerized polycarbonate diol (IIIA) is not less than 500 and not more than 5,000.
一种热塑性聚氨酯树脂弹性体是由异氰酸酯化合物 (I)、脂肪醇 (II)(根据羟基值确定的平均分子量小于 300 且仅有一个羟基作为官能团)和多元醇 (III)(根据羟基值确定的平均分子量不小于 300 且不大于 10,000)反应而得。异氰酸酯化合物 (I) 包括总含量不少于 90 摩尔的含有两个异氰酸酯基团的脂肪族异氰酸酯化合物和/或含有两个异氰酸酯基团的脂环族异氰酸酯化合物。脂肪醇 (II) 包含不少于 90 摩尔%的 C12 或更低的脂肪族二元醇。多元醇 (III) 包括不少于 80 摩尔%的共聚聚碳酸酯二元醇 (IIIA),包括下图所示的重复单元 (A) 和下图所示的重复单元 (B)。多元醇(III)的羟基当量(EIII):异氰酸酯化合物(I)的异氰酸酯当量(EI):脂肪醇(II)的羟基当量(EII)所代表的当量比为 1.0:2.0-5.5:1.0-4.5(但条件是 0.95 ≤ (EI) / ((EII) + (EIII)) ≤ 1.05)。共聚聚碳酸酯二元醇(IIIA)的平均分子量不小于 500,不大于 5000。