US3673105A
Expired / Lapsed
US
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Defoamer compositions for aqueous systems
Assignee: Diamond Shamrock Corp
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Filing: 1969-04-11
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Granted: 1972-06-27
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Expires: 1989-04-11
Abstract
Abstract Defoamer compositions and method of defoaming aqueous systems such as latex or paper and pulp systems, for example, compositions being composed of certain fatty amides, inorganic particles (talc, for example), hydrocarbon liquid, an oil soluble polymer and a silicone oil.
Inventors
- 👤 James H Curtis
- 👤 Fred E Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
19 words
The method of claim 1 wherein said amide is the reaction product of ethylene diamine and tallow fatty acids.
Claim 2
Dependent Claim
11 words
The method of claim 1 wherein said inorganic particles are talc.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said inorganic particles are calcium hydroxide.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said liquid hydrocarbon is mineral oil.
Claim 5
Dependent Claim
137 words
The method of claim 7 wherein the aqueous system is black liquor used in paper preparation and the defoamer composition comprises a. from about 1 to about 12 parts by weight of the reaction product of ethylene diamine and tallow fatty acids, b. from about 5 to about 25 parts by weight of talc ranging in size from about 1.4 to about 3.5 microns, c. from about 70 to about 92 parts by weight of mineral oil, d. from about 0.5 to about 7.5 parts by weight of an oil soluble copolymer of vinyl acetate and fumaric acid esterified with a tallow alcohol, and e. from 0 to about 0.2 parts by weight of silicone oil selected from the group consisting of alkyl polysiloxanes having viscosities of from about 40 to about 1,000 centistokes at 25* C.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |