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US4101443A
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Transient antifoam compositions
Assignee: OSI Specialties Inc
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Filing: 1976-06-01
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Granted: 1978-07-18
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Expires: 1996-06-01
Abstract
Abstract Transient, non-aqueous antifoam compositions which comprise the product resulting from heating a silica filler and a condensation product of a partially hydrolyzed trifunctional silane.
Inventors
- 👤 Meyer Robert Rosen
- 👤 Samuel Sterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:48
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
135 words
A transient non-aqueous antifoam composition, said composition consisting essentially of the product resulting from heating, in the absence of water, a mixture consisting essentially of a finely divided silica filler and a condensation product of a partially hydrolyzed trifunctional silane, said condensation product having a residual alkoxy content of at least about 9 percent by weight, said silane being selected from the group consisting of RSiX 3 and RSi(OR') 3 wherein R is an alkyl radical having 1 to 5 carbon atoms, R' is an alkyl radical having 1 to 4 carbon atoms and X is a halogen atom, and wherein the amount ratio of said silica filler to said condensation product ranges from about 1 to about 33 parts by weight of the silica filler per 100 parts by weight of the condensation product.
Claim 2
Dependent Claim
135 words
A transient non-aqueous antifoam composition, said composition consisting essentially of the product resulting from heating, in the absence of water, a mixture consisting essentially of a finely divided silica filler and a condensation product of a partially hydrolyzed trifunctional silane, said condensation product having a residual alkoxy content of at least about 9 percent by weight, said silane being selected from the group consisting of RSiX 3 and RSi(OR') 3 wherein R is an alkyl radical having 1 to 5 carbon atoms, R' is an alkyl radical having 1 to 4 carbon atoms and X is a halogen atom, and wherein the amount ratio of said silica filler to said condensation product ranges from about 1 to about 33 parts by weight of the silica filler per 100 parts by weight of the condensation product.
Claim 3
Dependent Claim
14 words
An antifoam composition as defined, in claim 1, wherein the filler is fumed silica.
Claim 4
Dependent Claim
78 words
An antifoam composition as defined in claim 2, wherein R is a methyl radical, R' is an ethyl radical and X is a chlorine radical, wherein the condensation product has a residual ethoxy content of from about 40 to 50 percent by weight, and wherein the amount of ratio of said filler to said condensation product ranges from about 3 to about 20 parts by weight of the filler per 100 parts by weight of the condensation product.
Claim 5
Dependent Claim
20 words
An antifoam composition as defined in claim 3, wherein the heating temperature ranges from about 80° to about 200° C.
Claim 6
Dependent Claim
35 words
An antifoam composition as defined in claim 3, wherein the mixture is sheared and then heated at a temperature in the range of about 100° C. to about 170° C. for at least 1/2 hour.
Claim 7
Dependent Claim
24 words
An antifoam composition as defined in claim 5, wherein the condensation product has a viscosity of about 10 to 20 centipoises at 25° C.
Claim 8
Dependent Claim
12 words
A solvent solution of an antifoam composition as defined in claim 1.
Claim 9
Dependent Claim
12 words
A solvent solution of an antifoam composition as defined in claim 5.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |