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US4436647A
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Self-emulsifiable antifoams
Assignee: Wacker Chemie AG
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Filing: 1982-04-21
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Granted: 1984-03-13
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Expires: 2002-04-21
Abstract
Abstract Self-emulsifiable antifoams containing an organopolysiloxane in which at least 80 mole percent of the siloxane units are dihydrocarbon siloxane units, a filler, a water-soluble cellulose derivative, and as an additional dispersant, at least one compound having the following general formula: RCOO(CH.sub.2).sub.2 SO.sub.3 M where R is an aliphatic hydrocarbon radical having at least 7 carbon atoms in which at least 10 percent of the number of R radicals must have at least 11 carbon atoms, and M represents an ammonium group or an alkali metal atom.
Inventors
- 👤 Ewald Pirson
- 👤 Jakob Schmidlkofer
- 👤 Ernst Innertsberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:32
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A self-emulsifiable antifoam composition which is essentially anhydrous consisting essentially of an organopolysiloxane in which at least 80 mole percent of the siloxane units are dihydrocarbon siloxane units, a filler in an amount of from about 0.1 to about 30 percent by weight based on the weight of the organopolysiloxane, a water-soluble cellulose derivative in an amount of from about 2 to 30 percent by weight based on the weight of the composition and from about 5 to about 25 percent by weight based on the weight of the composition of at least one compound of the general formula RCOO(CH.sub.2).sub.2 SO.sub.3 M, where R is an aliphatic hydrocarbon radical having at least 7 carbon atoms, in which at least 10 percent of the number of R radicals must have at least 11 carbon atoms, and M is selected from the group consisting of an ammonium group and an alkali metal ion.
Claim 2
Dependent Claim
151 words
A self-emulsifiable antifoam composition which is essentially anhydrous consisting essentially of an organopolysiloxane in which at least 80 mole percent of the siloxane units are dihydrocarbon siloxane units, a filler in an amount of from about 0.1 to about 30 percent by weight based on the weight of the organopolysiloxane, a water-soluble cellulose derivative in an amount of from about 2 to 30 percent by weight based on the weight of the composition and from about 5 to about 25 percent by weight based on the weight of the composition of at least one compound of the general formula RCOO(CH.sub.2).sub.2 SO.sub.3 M, where R is an aliphatic hydrocarbon radical having at least 7 carbon atoms, in which at least 10 percent of the number of R radicals must have at least 11 carbon atoms, and M is selected from the group consisting of an ammonium group and an alkali metal ion.
Claim 3
Dependent Claim
25 words
The self-emulsifiable antifoam composition of claim 1, wherein R is a straight-chain hydrocarbon radical having from 12 to 19 carbon atoms, and M is sodium.
Claim 4
Dependent Claim
90 words
The self-emulsifiable antifoam composition of claim 1, wherein the compound having the general formula: RCOO(CH.sub.2).sub.2 SO.sub.3 M is present in an amount of from about 10 to about 18 percent by weight, based on the total weight of the composition, wherein R is an aliphatic hydrocarbon radical having at least 7 carbon atoms in which at least 10 percent of the number of the R radicals must have at least 11 carbon atoms and M is selected from the group consisting of an ammonium group and an alkali metal ion.
References Cited (Backward Citations)
US3423340A
Cited
US3650979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |