US4139546A
Expired / Lapsed
US
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Anionic silicone defoamer
Assignee: Witco Corp
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Filing: 1977-09-06
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Granted: 1979-02-13
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Expires: 1997-09-06
Abstract
Abstract An anionic silicone defoamer having the following general formula: ##STR1## wherein: R is alkyl; X is 1 to 20; Y is 1 to 10; Z is 2 to 4, and; M is a monovalent cation. The anionic silicone defoamer is made, for instance, by reacting dimethyldichlorosilane, trimethylchlorosilane, and beta-cyanoethyl methyldichlorosilane in the presence of aqueous sodium hydroxide. Dry detergent compositions containing the present anionic silicone composition exhibit reduced foaming, even after several months of storage.
Inventors
- 👤 Paul D. Berger
- 👤 Tomas J. Benavides
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:46
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/162; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C08; C08G; C08G77/00; C08G77/04; C08G77/045; C08G77/38; C08G77/382; C08G77/398; C11D3/0005; C11D3/0026; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
A method for preparing an anionic silicone defoamer having the following formula: ##STR3## wherein: R is alkyl; X is 1 to 20; Y is 1 to 10; Z is 2 to 4, and; M is a monovalent cation; said method comprising: Reacting dialkyldihalosilane, trialkylhalosilane and beta-cyanoethyl or beta-cyanopropyl alkyldihalosilane in the presence of MOH, wherein M is as aforesaid and wherein the alkyl of the silane is CH 3 or C 2 H 5 .
Claim 2
Independent Claim
75 words
A method for preparing an anionic silicone defoamer having the following formula: ##STR3## wherein: R is alkyl; X is 1 to 20; Y is 1 to 10; Z is 2 to 4, and; M is a monovalent cation; said method comprising: Reacting dialkyldihalosilane, trialkylhalosilane and beta-cyanoethyl or beta-cyanopropyl alkyldihalosilane in the presence of MOH, wherein M is as aforesaid and wherein the alkyl of the silane is CH 3 or C 2 H 5 .
Claim 3
Dependent Claim
11 words
The method of claim 1, wherein M is an alkali metal.
Claim 4
Dependent Claim
9 words
The method of claim 1, wherein M is sodium.
Claim 5
Dependent Claim
10 words
The method of claim 1, wherein the R is methyl.
Claim 6
Dependent Claim
57 words
A laundry detergent composition comprising a detergent selected from a sulfonate and a phosphate and up to about 1% by weight of an anionic silicone defoamer having the following general formula: ##STR4## wherein: R is alkyl; X is 1 to 20; Y is 1 to 10; Z is 2 to 4, and; M is a monovalent cation.
Claim 7
Dependent Claim
57 words
A laundry detergent composition comprising a detergent selected from a sulfonate and a phosphate and up to about 1% by weight of an anionic silicone defoamer having the following general formula: ##STR4## wherein: R is alkyl; X is 1 to 20; Y is 1 to 10; Z is 2 to 4, and; M is a monovalent cation.
Claim 8
Dependent Claim
15 words
The laundry detergent of claim 5, wherein the sulfonate is a linear alkyl benzene sulfonate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |