Amphiphilic polyesters, preparation thereof, and use thereof in laundry detergents
US5777046A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Aug 5, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/672
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Amphiphilic polyesters containing PA1 (a) ester units derived from polyalkylene glycols having a molecular weight of from 500 to 7500 and aliphatic dicarboxylic acids and/or monohydroxymonocarboxylic acids and PA1 (b) ester units derived from aromatic dicarboxylic acids and polyhydric alcohols and having molecular weights of from 1500 to 25,000, processes for preparing the amphiphilic polyesters by polycondensation, preparing first PA1 (a) aliphatic polyesters of polyalkylene glycols having a molecular weight of from 500 to 7500 with aliphatic dicarboxylic acids and/or monohydroxymonocarboxylic acids and then, within the aliphatic polyester thus obtained, PA1 (b) aromatic polyesters from aromatic dicarboxylic acids and polyhydric alcohols, reversing the order of the polycondensation, or condensing oligomeric aromatic polyesters (b) with oligomeric aliphatic polyesters (a), and use of the amphiphilic polyesters as additive in laundry detergents, other laundry detergent additives and laundry aftertreatments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.