Silicone foam control composition
US5380464A · kind A · utility
29Cited by
14References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1990 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Feb 12, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D19/0409
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There is disclosed a foam control composition comprising (I) a silicone defoamer reaction product and (II) a silicone glycol copolymer, which composition is particularly effective in defoaming highly acidic or highly basic aqueous systems. Component (I) is prepared by heating a mixture of (i) a polyorganosiloxane fluid, (ii) a resinous silicon compound, (iii) a finely divided filler and (iv) a catalytic amount of a compound for promoting the reaction of the other components at a temperature of 50.degree. C. to 300.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.