Process for the preparation of polycondensates of amino acids and the biodegradable polypeptide hydrolysates thereof, and their use in detergent compositions
US5688903A · kind A · utility
1Cited by
5References
7Claims
0Family size
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Key dates
| Filing date | Sep 29, 1995 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3719
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process for the preparation of polycondensates of amino acids or of the polypeptide hydrolysates thereof, by bulk thermal polycondensation of amino acids in pulverulent medium, in the presence of phosphoric acid, phosphorus pentoxide or polyphosphoric acid (catalyst) which is uniformly distributed in the said pulverulent medium, optionally followed by hydrolysis. The said pulverulent medium may be obtained by empasting the amino acid and the catalyst with water, removal of the water and grinding. Use of polyimide polycondensates or the polypeptide hydrolysates thereof in detergent compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.