Particulate foam control agents and their use
US5668101A · kind A · utility
7Cited by
21References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1994 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | Jul 18, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/0034
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of providing a foam control agent with 1 to 30 parts of a silicone antifoam and 70 to 99 parts of a zeolite carrier, with the ability to release some of the antifoam within 10 minutes of being dispersed in an aqueous surfactant solution, by depositing 5 to 70% of the antifoam of an organopolysiloxane polyoxyalkylene copolymer, onto the zeolite carrier not later than depositing the silicone antifoam. Also claimed is the use of the copolymer to achieve that end and compositions where the antifoam is branched or high viscosity. Also claimed is encapsulated agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.