Patent · US Expired

Production of polysuccinimide and polyaspartic acid from maleic anhydride and ammonia

US5296578A · kind A · utility

46Cited by
4References
11Claims
0Family size

Assignee

Inventors

Key dates

Filing dateSep 18, 1992
Grant dateMar 22, 1994
Priority date—
Expiry dateSep 18, 2012

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08G73/1092
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

Production of polysuccinimide by reacting maleic anhydride and ammonia at elevated temperatures. The base hydrolyzed polyaspartic acid product.

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