Patent · US Expired

Detersive polyanhydroaspartic acids and biodegradable hydrolysates thereof

US5536813A · kind A · utility

52Cited by
7References
11Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 25, 1994
Grant dateJul 16, 1996
Priority date—
Expiry dateApr 25, 2014

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC11D3/3719
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

Novel polyanhydroaspartic acids (containing not more than 3% of NH groups of the imide moieties thereof relative to the total amount of CH moieties of the succinimide moieties thereof) and the at least 90%.+-.5% biodegradable hydrolysates thereof (containing not more than 3% of primary amide groups relative to the secondary amide groups of the aspartic moieties thereof) are well suited as detergent (co)builders, the former being prepared by thermally polymerizing aspartic acid in the presence of an effective amount of at least one boron compound having at least one B-OH group, or precursor thereof, and the latter by hydrolyzing the polyanhydroaspartic acid thus obtained.

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