Esters of phosphorous acid
    91.
    发明授权
    Esters of phosphorous acid 失效
    亚磷酸酯

    公开(公告)号:US4073769A

    公开(公告)日:1978-02-14

    申请号:US635010

    申请日:1975-11-25

    IPC分类号: C07F9/655 C08K5/529 C08K5/52

    CPC分类号: C07F9/6551 C08K5/529

    摘要: Phosphites of the general formula: ##STR1## in which N.sub.1 IS AN INTEGER; n.sub.2 is 0 or an integer; n.sub.3 is an integer;At least one of the groups R is an oxetane group as hereinafter defined or a hydrocarbon radical being substituted at least by one oxetane group as hereinafter defined;The remaining groups R are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; andThe group or groups Ar are the same or different at-least-divalent aromatic groups the free valencies of which are directly linked to the aromatic nuclei;And a process for their preparation.

    摘要翻译: 亚磷酸酯,其通式如下:,其中N1是AN INTEGER; N2 IS 0或一个整数; N3是整数; 基团中的至少一个R是下文定义的氧杂环丁烷基团或至少被一个如下文定义的氧杂环丁烷基团取代的烃基; 剩余基团R选自烷基,芳烷基,环烷基,芳基和杂芳基; 和基团Ar是相同或不同的至少二价芳族基团,其自由基直接连接到芳香核上; 及其制备方法。

    Cycloaliphatic thermoplastic polyurethane elastomers
    93.
    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。