Cycloaliphatic thermoplastic polyurethane elastomers
    60.
    发明授权
    Cycloaliphatic thermoplastic polyurethane elastomers 失效
    环脂族热塑性聚氨酯弹性体

    公开(公告)号:US5942593A

    公开(公告)日:1999-08-24

    申请号:US805840

    申请日:1997-03-03

    摘要: A process for the preparation of a polyurethane-urea elastomer having a mole ratio of NCO groups to all active hydrogen atoms in the range of 0.9 to 1.2 is disclosed. The process comprise reacting (A), (B) and (C.2) for form an NCO-containing prepolymer and then reacting said prepolymer with (C.1) and (D). Accordingly (A) is 5-isocyanato-1-(isocyanatomethyl)-1,1,3-trimethylcyclohexane or bis-(4-isocyanatocyclohexyl)-methane,(B) is polytetrahydrofuran or hexanediol polycarbonate and (C.2) is a chain extender. (C.1) is 5-amino-3-amino-methyl-1,3,3-trimethylcyclohexane or bis-(4-aminocyclohexyl)-methane and (D) is a molecular weight regulator. The elastomer thus produced is particularly suitable for the preparation of moldings, films, flexible tubing (for medical purposes) and catheters.

    摘要翻译: 公开了一种制备具有NCO基摩尔数与所有活性氢原子在0.9至1.2范围内的聚氨酯 - 脲弹性体的方法。 该方法包括使(A),(B)和(C.2)反应形成含NCO的预聚物,然后使所述预聚物与(C.1)和(D)反应。 因此(A)是5-异氰酸基-1-(异氰酸根合甲基)-1,1,3-三甲基环己烷或双 - (4-异氰酸根合环己基) - 甲烷,(B)是聚四氢呋喃或己二醇聚碳酸酯,(C.2) 延长剂 (C.1)是5-氨基-3-氨基 - 甲基-1,3,3-三甲基环己烷或双 - (4-氨基环己基) - 甲烷,(D)是分子量调节剂。 如此制备的弹性体特别适用于制备模制品,薄膜,柔性管(用于医疗用途)和导管。