发明名称 |
Polyimide compositions and foams and methods of making same |
摘要 |
Methods of making modified polyimide compositions and the resulting compositions. A polyimide forming material is prepared by treating an aromatic dianhydride with an esterifying solvent, then adding a suitable diamine. In order to obtain a foam which is non-friable and resistant to repeated compressive forces, the selected diamine must contain an aliphatic moiety in the chain. This material is dried to a powder or film. A foam is produced by heating the material to reaction temperature for a period sufficient to produce a stable foam. The material melts, then spontaneously expands into a foam which becomes self supporting and cures to a resilient, flexible non-friable foam.
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申请公布号 |
US4546115(A) |
申请公布日期 |
1985.10.08 |
申请号 |
US19850705129 |
申请日期 |
1985.02.25 |
申请人 |
GAGLIANI, JOHN;LONG, JOHN V. |
发明人 |
GAGLIANI, JOHN;LONG, JOHN V. |
分类号 |
C08G73/00;C08G73/10;C08J9/02;(IPC1-7):C08J9/02 |
主分类号 |
C08G73/00 |
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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