Particulate foam control agents and their use
US5861368A · kind A · utility
9Cited by
23References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1997 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Jan 18, 2017 |
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 deposition 5 to 70% of the antifoam of an organo-polysiloxane 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.