Patent US4077894A successfully refreshed from Google Patents.
US4077894A
Expired / Lapsed
US
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Glycol antifreeze mixtures
Assignee: Ashland LLC
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Filing: 1976-12-27
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Granted: 1978-03-07
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Expires: 1996-12-27
Abstract
Abstract A glycol-based antifreeze formulation containing as a defoaming agent, from 0.001% to about 1.0% by weight of a mixture containing a compound of the formula ##STR1## WHEREIN R is an alkyl, alkoxyalkyl, hydroxyalkyl, or dihydroxyalkyl group having from 1 to 6 carbon atoms, R 1 is hydrogen, methyl or ethyl, R 2 is an alkyl group having 1 to 8 carbon atoms, p is an integer from 1 to 20, and n is an integer from 1 to 14; and a compound of the formula RO--(C.sub.6 H.sub.10 O.sub.5).sub.p --H wherein R and p are as defined above.
Inventors
- 👤 William Keith Langdon
- 👤 Daniel Ronan Dutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:26
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
In an antifreeze composition comprising a glycol freezing point depressant and a corrosion inhibitor system, a foam suppressing agent present in an amount of from about 0.001% to about 1.0% by weight of the antifreeze composition and consisting essentially of a mixture of (1) a compound having the formula ##STR17## wherein R is an alkyl, alkoxyalkyl, hydroxyalkyl, or dihydroxyalkyl having from 1 to 6 carbon atoms, R 1 is hydrogen, methyl or ethyl, R 2 is an alkyl group having 1 to 8 carbon atoms, p is an integer from 1 to 20, and n is an integer from 1 to 14, and (2) a compound having the formula RO-(C.sub.6 H.sub.10 O.sub.5).sub.p -H wherein R and p are as defined above, and wherein the weight ratio of compound (1) and compound (2) are from about 1:10 to 10:1.
Claim 2
Dependent Claim
138 words
In an antifreeze composition comprising a glycol freezing point depressant and a corrosion inhibitor system, a foam suppressing agent present in an amount of from about 0.001% to about 1.0% by weight of the antifreeze composition and consisting essentially of a mixture of (1) a compound having the formula ##STR17## wherein R is an alkyl, alkoxyalkyl, hydroxyalkyl, or dihydroxyalkyl having from 1 to 6 carbon atoms, R 1 is hydrogen, methyl or ethyl, R 2 is an alkyl group having 1 to 8 carbon atoms, p is an integer from 1 to 20, and n is an integer from 1 to 14, and (2) a compound having the formula RO-(C.sub.6 H.sub.10 O.sub.5).sub.p -H wherein R and p are as defined above, and wherein the weight ratio of compound (1) and compound (2) are from about 1:10 to 10:1.
Claim 3
Dependent Claim
17 words
An antifreeze composition as defined in claim 1, in which the p integers are substantially all 1.
Claim 4
Dependent Claim
14 words
An antifreeze composition as defined in claim 1, in which R 1 is methyl.
Claim 5
Dependent Claim
106 words
An antifreeze composition as defined in claim 1, in which the corrosion inhibitor system comprises from 0.01% to 1% by weight of the antifreeze of at least one substance selected from the group consisting of a. compounds corresponding to the structural formula ##STR18## wherein R 6 is an alkylene radical containing from 0 to 12 carbon atoms, R 7 is an alkyl radical containing from 1 to 10 carbon atoms and R 8 is an alkylene radical containing from 1 to 12 carbon atoms, and b. the mono- and di- metal salts, the mono- and di- ammonium salts, and the mono- and di- amides of a.
Claim 6
Dependent Claim
13 words
An antifreeze composition as defined in claim 4, wherein the inhibitor comprises 1-carboxy-2-hexyl-5-(7-carboxyheptyl)-cyclohex-3-ene.
Claim 7
Dependent Claim
120 words
In an antifreeze composition comprising a glycol freezing point depressant and a corrosion inhibitor system, a foam suppressing agent present in an amount of from about 0.001% to about 1.0% by weight of the antifreeze composition and consisting essentially of a mixture of (1) a compound having the formula ##STR19## wherein R is an alkyl, alkoxyalkyl, hydroxyalkyl, or dihydroxyalkyl having from 1 to 6 carbon atoms, R 2 is an alkyl group having 1 to 8 carbon atoms, and n is an integer from 3 to 7, and (2) a compound having the formula RO--(C.sub.6 H.sub.10 O.sub.5)--H wherein R is as defined above, and wherein the weight ratio of compound (1) and compound (2) are from about 1:3 to 3:2.
Claim 8
Dependent Claim
120 words
In an antifreeze composition comprising a glycol freezing point depressant and a corrosion inhibitor system, a foam suppressing agent present in an amount of from about 0.001% to about 1.0% by weight of the antifreeze composition and consisting essentially of a mixture of (1) a compound having the formula ##STR19## wherein R is an alkyl, alkoxyalkyl, hydroxyalkyl, or dihydroxyalkyl having from 1 to 6 carbon atoms, R 2 is an alkyl group having 1 to 8 carbon atoms, and n is an integer from 3 to 7, and (2) a compound having the formula RO--(C.sub.6 H.sub.10 O.sub.5)--H wherein R is as defined above, and wherein the weight ratio of compound (1) and compound (2) are from about 1:3 to 3:2.
Claim 9
Dependent Claim
15 words
An antifreeze composition as defined in claim 6, in which R is a hydroxyalkyl group.
Claim 10
Dependent Claim
20 words
An antifreeze composition as defined in claim 6, in which R 2 is an alkyl group having 4-6 carbon atoms.
Claim 11
Dependent Claim
106 words
An antifreeze composition as defined in claim 6, in which the corrosion inhibitor system comprises from 0.01% to 1% by weight of the antifreeze of at least one substance selected from the group consisting of a. compounds corresponding to the structural formula ##STR20## wherein R 6 is an alkylene radical containing from 0 to 12 carbon atoms, R 7 is an alkyl radical containing from 1 to 10 carbon atoms and R 8 is an alkylene radical containing from 1 to 12 carbon atoms, and b. the mono- and di- metal salts, the mono- and di- ammonium salts, and the mono- and di- amides of a.
Claim 12
Dependent Claim
13 words
An antifreeze composition as defined in claim 9, wherein the inhibitor comprises 1-carboxy-2-hexyl-5-(7-carboxyheptyl)-cyclohex-3-ene.
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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |