Detergency boosting polymer blends as additives for laundry formulations
US5733856A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1994 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Apr 8, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3788
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A laundry detergency boosting polymer blend additive is made up of: PA1 a) a graft copolymer of polyalkylene oxide with vinyl ester, the graft copolymer having a molecular weight within the range of about 5,000 to 50,000; and PA1 b) at least one polycarboxylate selected from the group consisting of acrylic/maleic acid copolymers having a molecular weight within the range of about 1,000 to 100,000, and polyacrylic acid having a molecular weight of from about 1,000 to 100,000. The polymer blend additive is effective in water with an ion hardness in the range of about 50 to 500 ppm. The detergency boosting performance of the polymer blend additive is maintained or increased as the concentration of the hardness ions in water is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.