Patent · US Expired

Ethynyl-containing aromatic polyamide resin

US4663425A · kind A · utility

17Cited by
3References
6Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 10, 1985
Grant dateMay 5, 1987
Priority date—
Expiry dateDec 10, 2005

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08G69/32
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

Aromatic polyamide resins having repeating units, each containing at least one m-ethynyl amido subunit: ##STR1## These resins can be thermally treated to undergo intra-molecular cyclization, without evolution of volatiles, into polyimidines containing the following subunit. ##STR2##

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.