Compositions for defoaming aqueous compositions
US6512016B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2001 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Jul 20, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D19/0409
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Defoaming compositions consisting essentially of:A) at least one organosilicone compound having defoaming activity in aqueous based compositions; andB) at least one base catalyzed reaction product of:a) a linking agent of formula IR4(Y)3  (I)wherein each Y group is a halogen atom or a halogen and two Y groups on adjacent carbons in R4 and an oxygen may be an epoxy group, and R4 is an alkane triyl group having 3 to 10 carbon atoms; andb) a compound of formula IIR3(EO)n(PO)m(BO)pX  (II)wherein R3 is defined in the specification; n, m, and p are 0 to 50; X is hydrogen, mercapto group or amino group; when X is other than hydrogen, the sum of m, n, and p must be at least 1; the mole ratio of I:II is from about 0.6:1 to about 5:1; and aqueuos compositions containing them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.