发明名称 |
Production of particulate amide/imide prepolymers |
摘要 |
Fusible polyimide powders are prepared by the process of this invention. An amic acid amine is first prepared by treating (n+1) moles of a bis(aminophenyl)methane with n mole of aromatic tetracarboxylic anhdride to produce an aromatic amic acid prepolymer. This prepolymer is then mixed with an unsaturated carbocyclic monoanhydride and the mixture heated to form a reactive end-capped polyamic acid precursor. The resulting composition is thermally treated in order to partially imidize the precursor. The resulting fusible polyimide powder is finally separated.
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申请公布号 |
US5145943(A) |
申请公布日期 |
1992.09.08 |
申请号 |
US19900628647 |
申请日期 |
1990.12.17 |
申请人 |
ETHYL CORPORATION |
发明人 |
LI, HSUEH M.;LEE, JOHN Y. |
分类号 |
C08G73/10 |
主分类号 |
C08G73/10 |
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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