Poly(amide-amide acid), polyamide acid, poly(esteramide acid), poly(amide-imide), polyimide, poly(esterimide) from poly arylene diamine
US4681928A · kind A · utility
40Cited by
10References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 1, 1984 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Jun 1, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aromatic or aliphatic dianhydrides and/or acid anhydrides are reacted with certain aromatic diamines alone or in combination with other diamines to produce polyimides, polyamide acids, poly(amide-imides), poly(amide-amide acids), poly(esterimides) or poly(esteramide acids). These polymers are thermoplastic in nature and have improved processing characteristics and thermal stability. The polymers may be prepared by either melt or solution polymerization techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.