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US5064875A Process for the preparation of heat-stable polyurethane urea elastomers 失效
制备耐热聚氨酯脲弹性体的方法

Process for the preparation of heat-stable polyurethane urea elastomers
摘要:
This invention relates to a process for preparing polyurethane urea elastomers by reacting (a) compounds containing at least two isocyanate-reactive groups and having a molecular weight in the range from about 400 to about 10,000; (b) polyisocyanates; and (c) aromatic diamines corresponding to the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen or alkyl.
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