Process for making photopolymerizable aromatic polyamic acid derivatives
US4551522A · kind A · utility
20Cited by
10References
1Claims
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Key dates
| Filing date | Apr 26, 1985 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Apr 26, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/0387
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the synthesis of the photosensitive polyamic acid derivatives which are polyimide precursors, comprising the sequential steps: PA1 (1) Partially derivatizing an aromatic dianhydride with a reactive monomer containing a photosensitive moiety; PA1 (2) Condensation polymerizing the partially derivatized aromatic dianhydride with aromatic diamine to form polyamic acid; PA1 (3) Isoimidization of the polyamic acid; PA1 (4) Condensation of the polyisoimide to polyamic acid derivative by reaction with additional reactive monomer; and PA1 (5) Separation of the polyamic acid derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.