Patent · US Expired

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

Inventors

Key dates

Filing dateJun 1, 1984
Grant dateJul 21, 1987
Priority date
Expiry dateJun 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.