发明名称 |
BOGENMATERIAL |
摘要 |
<p>A polyurethane elastomer which comprises a reaction product of (A) a polymeric diol having a molecular weight of about 800-5000, (B) a mixture of organic diisocyanates wherein about 2-70 mol % is composed of aliphatic diisocyanate (said aliphatic diisocyanate having no direct bond between an aromatic ring and an isocyanate group) and wherein the balance 98-30 mol % is composed of aromatic diisocyanate which includes a direct bond between an aromatic ring and an isocyanate group, and (C) a chain extender comprising hydrazine and/or a derivative having the formula NH2NHR and another chain extender having two functional groups constituting amino and/or hydroxyl groups, and wherein about 30-80% of the carbon atoms which are bonded to nitrogen atoms constituting the ureylene and/or urethane bonds of said polyurethane elastomer constitute benzene and/or naphthalene ring skeletons. and wherein about 2-70% of the ureylene bonds of said polyurethane elastomer are formed by the reaction of aliphatic diisocyanate and hydrazine and/or its derivative having the formula NH2NHR.</p> |
申请公布号 |
DE2903151(A1) |
申请公布日期 |
1979.08.16 |
申请号 |
DE19792903151 |
申请日期 |
1979.01.27 |
申请人 |
TORAY INDUSTRIES,INC. |
发明人 |
TANAKA,MINORU;YAGI,KENKICHI;SHIMIZU,KITAO |
分类号 |
C08G18/10;C08G18/72;D06M15/564;D06N3/14;(IPC1-7):D06N3/14;B32B27/40;B32B27/02 |
主分类号 |
C08G18/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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