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    • 7. 发明授权
    • Process for the production of polyurethane urea elastomers
    • 生产聚氨酯脲弹性体的方法
    • US4882361A
    • 1989-11-21
    • US245846
    • 1988-09-16
    • Andreas RuckesGerhard GroglerRichard Kopp
    • Andreas RuckesGerhard GroglerRichard Kopp
    • C08G18/65C08G18/00C08G18/08C08G18/38C08G101/00C08J9/14
    • C08G18/3829C08G2120/00
    • The present invention is directed to a process for the production of compact or cellular, elastomeric moldings having a compact skin based on polyurethane urea elastomers prepared from(a) organic polyisocyanates,(b) relatively high molecular weight polyhydroxyl or polyamino compounds containing at least two reactive hydrogen atoms,(c) diaminodiphenyl ureas as chain-extending agents and optionally,(d) catalysts,(e) small quantities of ethylene glycol,(f) other chain-extending agents and/or cross-linking agents,(g) blowing agents and(h) auxiliaries and/or additives, which is characterized in that the chain-extending agents (c) are diaminodiphenyl ureas corresponding to formula I ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be the same or different and represent hydrogen or a C.sub.1 -C.sub.6 alkyl radical and wherein the NH.sub.2 groups are in the m- and/or p-position to the urea group.The present invention is also directed to the RIM elastomers produced by this process.
    • 本发明涉及一种生产紧凑型或细胞型弹性体模制品的方法,其具有基于由(a)有机多异氰酸酯制备的聚氨酯脲弹性体的紧密表皮,(b)相对高分子量的多羟基或聚氨基化合物,其含有至少两个 反应性氢原子,(c)作为扩链剂的二氨基二苯基脲和任选的(d)催化剂,(e)少量乙二醇,(f)其它增链剂和/或交联剂,(g) 发泡剂和(h)助剂和/或添加剂,其特征在于扩链剂(c)是对应于式I的二氨基二苯基脲(I),其中R 1,R 2,R 3和R 4可以相同 或不同的并且表示氢或C 1 -C 6烷基,并且其中NH 2基团与脲基团的m-位和/或p-位。 本发明还涉及通过该方法制备的RIM弹性体。