Dispersible silicone wash and rinse cycle antifoam formulations
US4978471A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Aug 7, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/373
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dispersible silicone antifoam composition for providing controlled foaming laundry detergent formulations effective in both the wash and the rinse cycles of a washing machine. The antifoam includes a non-aqueous emulsion of primary and secondary silicone antifoam agents, at least one nonionic silicone surfactant for emulsifying the primary and secondary antifoam agents in a solvent, a first organic surfactant dispersing agent for assisting in dispersing the emulsified primary and secondary antifoam agents in the laundry detergent, and a second dispersing agent of a nonionic difunctional block-copolymer terminating in primary hydroxyl groups for further assisting in dispersing the emulsified primary and secondary antifoam agents in the laundry detergent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.