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Patent US3856701A successfully refreshed from Google Patents.
US3856701A
Expired / Lapsed
US
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Antifoam composition
Assignee: Dow Silicones Corp
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Filing: 1973-04-09
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Granted: 1974-12-24
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Expires: 1993-04-09
Abstract
Abstract An antifoam composition is disclosed which consists essentially of (1) 1 to 20 percent by weight of a siliconeglycol copolymer, (2) 65 to 98 percent by weight of a propylene glycol, and (3) 1 to 15 percent by weight of a hydrophilic silica which is preferably treated in situ. The composition is particularly useful in latexes.
Inventors
- 👤 K Householder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:04
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409; C; C08; C08L; C08L71/00; C08L71/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
177 words
AN ANTIFOAM COMPOSITION WHICH CONSISTS ESSENTIALLY OF 1. 1 TO 20 PERCENT BY WEIGHT OF A SILICONE-GLYCOL COPOLYMER HAVING THE GENERAL FORMULA (CH3)3SIO((CH3)2SIO)X(CH3)GSIO)YSI(CH3)3 WHEREIN X HAS AN AVERAGE VALUE FROM 50 TO 100, Y HAS AN AVERAGE VALUE FROM 5 TO 10, AND G IS A RADICAL OF THE STRUCTURE -D(OR)ZA WHEREIN D IS AN ALKYLENE RADICAL CONTAINING FROM 1 TO 30 CARBON ATOMS, R IS COMPOSED OF ETHYLENE RADICALS AND RADICALS SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND BUTYLENE RADICALS, THE AMOUNT OF ETHYLENE RADICALS RELATIVE TO THE OTHER ALKYLENE RADICALS BEING SUCH THE THE RATIO OF CARBON ATOMS TO OXYGEN ATOMS IN THE TOTAL OR BLOCKS RANGES FROM 2.3:1 TO 2.8:1, Z HAS AN AVERAGE VALUE FROM 25 TO 100, AND A IS A CAPPING GROUP SELECTED FROM THE GROUP CONSISTING OF HYDROXY, ACYL, ETHER AND CARBONATE ESTER CAPPING GROUPS, 2. 65 TO 98 PERCENT BY WEIGHT OF POLYPROPLENE GLYCOL AVING AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF 1000 TO 2000, AND 3. 1 TO 15 PERCENT BY WEIGHT OF A HYDROPHOBIC SILICA.
Claim 2
Dependent Claim
177 words
AN ANTIFOAM COMPOSITION WHICH CONSISTS ESSENTIALLY OF 1. 1 TO 20 PERCENT BY WEIGHT OF A SILICONE-GLYCOL COPOLYMER HAVING THE GENERAL FORMULA (CH3)3SIO((CH3)2SIO)X(CH3)GSIO)YSI(CH3)3 WHEREIN X HAS AN AVERAGE VALUE FROM 50 TO 100, Y HAS AN AVERAGE VALUE FROM 5 TO 10, AND G IS A RADICAL OF THE STRUCTURE -D(OR)ZA WHEREIN D IS AN ALKYLENE RADICAL CONTAINING FROM 1 TO 30 CARBON ATOMS, R IS COMPOSED OF ETHYLENE RADICALS AND RADICALS SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND BUTYLENE RADICALS, THE AMOUNT OF ETHYLENE RADICALS RELATIVE TO THE OTHER ALKYLENE RADICALS BEING SUCH THE THE RATIO OF CARBON ATOMS TO OXYGEN ATOMS IN THE TOTAL OR BLOCKS RANGES FROM 2.3:1 TO 2.8:1, Z HAS AN AVERAGE VALUE FROM 25 TO 100, AND A IS A CAPPING GROUP SELECTED FROM THE GROUP CONSISTING OF HYDROXY, ACYL, ETHER AND CARBONATE ESTER CAPPING GROUPS, 2. 65 TO 98 PERCENT BY WEIGHT OF POLYPROPLENE GLYCOL AVING AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF 1000 TO 2000, AND 3. 1 TO 15 PERCENT BY WEIGHT OF A HYDROPHOBIC SILICA.
Claim 3
Dependent Claim
22 words
65 to 98 percent by weight of polypropylene glycol having an average molecular weight in the range of 1000 to 2000, and
Claim 4
Dependent Claim
22 words
65 to 98 percent by weight of polypropylene glycol having an average molecular weight in the range of 1000 to 2000, and
Claim 5
Dependent Claim
39 words
An antifoam composition as defined in claim 1 consisting essentially of 6 To 10 percent of (1), 75 to 90 percent of (2), and 6 to 10 percent of (3), the hydrophobic silica (3) having been treated in situ.
Claim 6
Dependent Claim
43 words
An antifoam composition as defined in claim 2 wherein in (1) D contains from 1 to 18 carbon atoms, and R is composed of only ethylene and propylene radicals, and (2) has an average molecular weight in the range of 1000 to 1500.
Claim 7
Dependent Claim
10 words
1 to 15 percent by weight of a hydrophobic silica.
Claim 8
Dependent Claim
10 words
1 to 15 percent by weight of a hydrophobic silica.
Claim 9
Dependent Claim
14 words
An antifoam composition as defined in claim 3 wherein (1) has the general formula
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |