| 发明名称 |
Method of preparing polymer from dianhydride and hydrazine or dihydrazide |
| 摘要 |
Novel polymers formed from the reaction of tetracarboxylic dianhydrides and hydrazines or hydrazides which may be cross-linkable by further reaction with a hydrazine or a hydrazide are disclosed.
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| 申请公布号 |
US4020050(A) |
申请公布日期 |
1977.04.26 |
| 申请号 |
US19740511322 |
申请日期 |
1974.10.02 |
| 申请人 |
PPG INDUSTRIES, INC. |
发明人 |
SCHIMMEL, KARL F.;WISMER, MARCO |
| 分类号 |
C08G73/02;(IPC1-7):C08G73/08;C08G73/10 |
主分类号 |
C08G73/02 |
| 代理机构 |
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代理人 |
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| 主权项 |
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