US4287077A
Expired / Lapsed
US
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Glycol compositions containing an ether modified silicone to inhibit gelling
Assignee: Dow Chemical Co
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Filing: 1980-09-29
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Granted: 1981-09-01
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Expires: 2000-09-29
Abstract
Abstract Gellation resistant aqueous glycol and glycol ether compositions useful as antifreeze compositions are disclosed containing silicates together with other corrosion inhibitors. The silicates are added to the glycol compositions after the other additives have been added and after the composition has been adjusted to a pH range of 7-12. The gellation resistance is obtained or enhanced by the addition of an effective amount of a glycol soluble ether modified silicone having the repeating units ##STR1## wherein x has an average value range from 1.8 to 6.8 y has an average value range from 1 to 4 Z has the formula --R--C.sub.n H.sub.2n O--.sub.m R.sub.1 where n is 2 or 3 m has an average value such that the average molecular weight of the polyoxyalkylene chain is in the range 100-400 R is an alkylene chain of 2-4 carbons and R 1 is selected from the group consisting of hydrogen and alkyl groups of 1-4 carbons.
Inventors
- 👤 Phillip L. Wing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:59
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
154 words
A gellation resistant aqueous glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, an alkylene glycol ether, or mixtures thereof, (B) an effective amount to reduce corrosion of an alkali metal silicate, (C) an effective amount to improve gellation resistance of a glycol soluble ether modified silicone copolymer comprising the repeating units ##STR4## wherein x has an average value range from 1.8 to 6.8 y has an average value range from 1 to 4 Z has the formula --R--C.sub.n H.sub.2n O--.sub.m R.sub.1 where n is 2 or 3 m has an average value such that the average molecular weight of the polyoxyalkylene chain is in the range 100-400 R is an alkylene chain of 2-4 carbons and R 1 is selected from the group consisting of hydrogen and alkyl groups of 1-4 carbons (E) the remainder being water and an effective amount of one or more other corrosion inhibitors.
Claim 2
Dependent Claim
154 words
A gellation resistant aqueous glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, an alkylene glycol ether, or mixtures thereof, (B) an effective amount to reduce corrosion of an alkali metal silicate, (C) an effective amount to improve gellation resistance of a glycol soluble ether modified silicone copolymer comprising the repeating units ##STR4## wherein x has an average value range from 1.8 to 6.8 y has an average value range from 1 to 4 Z has the formula --R--C.sub.n H.sub.2n O--.sub.m R.sub.1 where n is 2 or 3 m has an average value such that the average molecular weight of the polyoxyalkylene chain is in the range 100-400 R is an alkylene chain of 2-4 carbons and R 1 is selected from the group consisting of hydrogen and alkyl groups of 1-4 carbons (E) the remainder being water and an effective amount of one or more other corrosion inhibitors.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the alkylene glycol is ethylene glycol.
Claim 4
Dependent Claim
17 words
The composition of claim 1 wherein the alkylene glycol ether is the monomethyl ether of propylene glycol.
Claim 5
Dependent Claim
30 words
The composition of claim 1 wherein the amount of silicone copolymer used ranges from about 0.001 to about 1.0 percent by weight based on the total weight of the composition.
Claim 6
Dependent Claim
148 words
A gellation resistant aqueous glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, (B) an effective amount to reduce corrosion of an alkali metal borate, (C) an effective amount to reduce corrosion of an alkali metal silicate, (D) an effective amount to improve gellation resistance of a glycol soluble ether modified silicone copolymer comprising the repeating units ##STR5## wherein x has an average value range from 1.8 to 6.8 Y has an average value range from 1 to 4 Z has the formula --R--C.sub.n H.sub.2n O--.sub.m R.sub.1 where n is 2 or 3 m has an average value such that the average molecular weight of the polyoxyalkylene chain is in the range 100-400 R is an alkylene chain of 2-4 carbons and R 1 is selected from the group consisting of hydrogen and alkyl groups of 1-4 carbons (E) the remainder being water.
Claim 7
Dependent Claim
148 words
A gellation resistant aqueous glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, (B) an effective amount to reduce corrosion of an alkali metal borate, (C) an effective amount to reduce corrosion of an alkali metal silicate, (D) an effective amount to improve gellation resistance of a glycol soluble ether modified silicone copolymer comprising the repeating units ##STR5## wherein x has an average value range from 1.8 to 6.8 Y has an average value range from 1 to 4 Z has the formula --R--C.sub.n H.sub.2n O--.sub.m R.sub.1 where n is 2 or 3 m has an average value such that the average molecular weight of the polyoxyalkylene chain is in the range 100-400 R is an alkylene chain of 2-4 carbons and R 1 is selected from the group consisting of hydrogen and alkyl groups of 1-4 carbons (E) the remainder being water.
Claim 8
Dependent Claim
12 words
The composition of claim 5 wherein the alkylene glycol is ethylene glycol.
Claim 9
Dependent Claim
17 words
The composition of claim 5 wherein the alkylene glycol ether is the monomethyl ether of propylene glycol.
Claim 10
Dependent Claim
30 words
The composition of claim 5 wherein the amount of silicone copolymer used ranges from about 0.001 to about 1.0 percent by weight based on the total weight of the composition.
Claim 11
Dependent Claim
147 words
A gellation resistant aqueous glycol composition comprising (A) 85 to 98 percent by weight of ethylene glycol, (B) an effective amount to reduce corrosion of an alkali metal borate, (C) an effective amount to reduce corrosion of an alkali metal silicate, (D) about 0.001 to 1.0 percent by weight of a glycol soluble ether modified silicone copolymer comprising the repeating units ##STR6## wherein x has an average value range from 1.8 to 6.8 y has an average value range from 1 to 4 Z has the formula --R--C.sub.n H.sub.2n O--.sub.m R.sub.1 where n is 2 or 3 m has an average value such that the average molecular weight of the polyoxyalkylene chain is in the range 100-400 R is an alkylene chain of 2-4 carbons and R 1 is selected from the group consisting of hydrogen and alkyl groups of 1-4 carbons (E) the remainder being water.
Claim 12
Dependent Claim
147 words
A gellation resistant aqueous glycol composition comprising (A) 85 to 98 percent by weight of ethylene glycol, (B) an effective amount to reduce corrosion of an alkali metal borate, (C) an effective amount to reduce corrosion of an alkali metal silicate, (D) about 0.001 to 1.0 percent by weight of a glycol soluble ether modified silicone copolymer comprising the repeating units ##STR6## wherein x has an average value range from 1.8 to 6.8 y has an average value range from 1 to 4 Z has the formula --R--C.sub.n H.sub.2n O--.sub.m R.sub.1 where n is 2 or 3 m has an average value such that the average molecular weight of the polyoxyalkylene chain is in the range 100-400 R is an alkylene chain of 2-4 carbons and R 1 is selected from the group consisting of hydrogen and alkyl groups of 1-4 carbons (E) the remainder being water.
Claim 13
Dependent Claim
41 words
The composition as set forth in claim 9 wherein the amount of alkali metal borate ranges from about 0.5 to about 2.0 percent by weight and the amount of alkali metal silicate ranges from about 0.025 to 1.0 percent by weight.
Claim 14
Dependent Claim
25 words
The composition as set forth in claim 9 wherein the amount of silicone copolymer used ranges from about 0.01 to about 0.025 percent by weight.
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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |