US3931029A
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US
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Corrosion inhibited antifreeze compositions and process for inhibiting the corrosion of solder alloys
Assignee: BASF Corp
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Filing: 1974-10-15
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Granted: 1976-01-06
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Expires: 1994-10-15
Abstract
Abstract A novel antifreeze composition is provided which comprises a water soluble liquid alcohol freezing point depressant and an inhibitor. The freezing point depressant is preferably at least one water soluble alcohol containing from one to four carbon atoms inclusive and from one to four hydroxy groups inclusive such as ethylene glycol. The inhibitor comprises at least one substance selected from the group consisting of A. compounds corresponding to the following structural formula: ##SPC1## Wherein R 1 is an alkylene radical containing from zero to 12 carbon atoms inclusive, R 2 is an alkyl radical containing from one to 10 carbon atoms inclusive and R 3 is an alkylene radical containing from one to 12 carbon atoms inclusive, and B. the mono- and di-metal salts, the mono- and di-ammonium salts, and the mono- and di-amides of compounds corresponding to the above structural formula. The presently preferred inhibitor comprises 1-carboxy-2-hexyl-5-(7-carboxyheptyl)-cyclohex-3-ene, or the mono- and di-metal salts, ammonium salts, and amides thereof. The inhibitor also aids in solublizing antifoam agents. The invention further provides a process for inhibiting the corrosion of solder alloys which employs the novel antifreeze composition of the invention.
Inventors
- 👤 Daniel R. Dutton
- 👤 John W. Compton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:14
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/12; C23F11/124
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
138 words
A corrosion inhibited antifreeze composition comprising a water soluble liquid alcohol freezing point depressant and an inhibitor, the inhibitor being present in the antifreeze composition in an amount effective to inhibit the corrosion of solder alloys when intimately contacted therewith, the inhibitor being present in an amount of about 0.01-1% by weight and comprising at least one substance selected from the group consisting of a. compounds corresponding to the structural formula: ##SPC3## wherein R 1 is an alkylene radical containing from zero to 12 carbon atoms inclusive, R 2 is an alkyl radical containing from one to 10 carbon atoms inclusive and R 3 is an alkylene radical containing from one to 12 carbon atoms inclusive, and b. the mono- and di- metal salts, the mono- and di- ammonium salts and the mono- and di- amides of (a).
Claim 2
Dependent Claim
138 words
A corrosion inhibited antifreeze composition comprising a water soluble liquid alcohol freezing point depressant and an inhibitor, the inhibitor being present in the antifreeze composition in an amount effective to inhibit the corrosion of solder alloys when intimately contacted therewith, the inhibitor being present in an amount of about 0.01-1% by weight and comprising at least one substance selected from the group consisting of a. compounds corresponding to the structural formula: ##SPC3## wherein R 1 is an alkylene radical containing from zero to 12 carbon atoms inclusive, R 2 is an alkyl radical containing from one to 10 carbon atoms inclusive and R 3 is an alkylene radical containing from one to 12 carbon atoms inclusive, and b. the mono- and di- metal salts, the mono- and di- ammonium salts and the mono- and di- amides of (a).
Claim 3
Dependent Claim
38 words
The antifreeze composition of claim 1 wherein R 1 contains from zero to four carbon atoms inclusive, R 2 contains from four to eight carbon atoms inclusive, and R 3 contains from five to nine carbon atoms inclusive.
Claim 4
Dependent Claim
11 words
The antifreeze composition of claim 1 wherein the inhibitor comprises 1-carboxy-2-hexyl-5-(7-carboxyheptyl)-cyclohex-3-ene.
Claim 5
Dependent Claim
19 words
The antifreeze composition of claim 1 wherein the inhibitor is present in an amount of about 0.3-0.6% by weight.
Claim 6
Dependent Claim
19 words
The antifreeze composition of claim 1 wherein the inhibitor is present in an amount of about 0.3% by weight.
Claim 7
Dependent Claim
34 words
The antifreeze composition of claim 1 wherein the freezing point depressant comprises at least one water soluble alcohol containing from one to four carbon atoms inclusive and from one to four hydroxy atoms inclusive.
Claim 8
Dependent Claim
129 words
A corrosion inhibited antifreeze composition comprising ethylene glycol as a freezing point depressant and an inhibitor, the inhibitor being present in the antifreeze composition in a minor but effective amount to inhibit the corrosion of solder alloys when intimately contacted therewith, and the inhibitor comprising at least one substance selected from the group consisting of a. compounds corresponding to the structural formula: ##SPC4## wherein R 1 is an alkylene radical containing from zero to 12 carbon atoms inclusive, R 2 is an alkyl radical containing from one to 10 carbon atoms inclusive and R 3 is an alkylene radical containing from one to 12 carbon atoms inclusive, and b. the mono- and di- metal salts, the mono- and di- ammonium salts and the mono- and di- amides of (a).
Claim 9
Dependent Claim
129 words
A corrosion inhibited antifreeze composition comprising ethylene glycol as a freezing point depressant and an inhibitor, the inhibitor being present in the antifreeze composition in a minor but effective amount to inhibit the corrosion of solder alloys when intimately contacted therewith, and the inhibitor comprising at least one substance selected from the group consisting of a. compounds corresponding to the structural formula: ##SPC4## wherein R 1 is an alkylene radical containing from zero to 12 carbon atoms inclusive, R 2 is an alkyl radical containing from one to 10 carbon atoms inclusive and R 3 is an alkylene radical containing from one to 12 carbon atoms inclusive, and b. the mono- and di- metal salts, the mono- and di- ammonium salts and the mono- and di- amides of (a).
Claim 10
Dependent Claim
38 words
The antifreeze composition of claim 7 wherein R 1 contains from zero to four carbon atoms inclusive, R 2 contains from four to eight carbon atoms inclusive, and R 3 contains from five to nine carbon atoms inclusive.
Claim 11
Dependent Claim
26 words
The antifreeze composition of claim 7 wherein R 1 contains zero carbon atoms, R 2 contains six carbon atoms, and R 3 contains seven carbon atoms.
Claim 12
Dependent Claim
19 words
The antifreeze composition of claim 7 wherein the inhibitor is present in an amount of about 0.01-1% by weight.
Claim 13
Dependent Claim
19 words
The antifreeze composition of claim 7 wherein the inhibitor is present in an amount of about 0.3-0.6% by weight.
Claim 14
Dependent Claim
19 words
The antifreeze composition of claim 7 wherein the inhibitor is present in an amount of about 0.3% by weight.
Claim 15
Dependent Claim
133 words
A corrosion inhibited antifreeze composition comprising a water soluble liquid alcohol freezing point depressant, an antifoam agent and an inhibitor, the inhibitor being present in the antifreeze composition in a minor but effective amount to inhibit the corrosion of solder alloys when intimately contacted therewith, and the inhibitor comprising at least one substance selected from the group consisting of a. compounds corresponding to the structural formula: ##SPC5## wherein R 1 is an alkylene radical containg from zero to 12 carbon atoms inclusive, R 2 is an alkyl radical containing from one to 10 carbon atoms inclusive and R 3 is an alkylene radical containing from one to 12 carbon atoms inclusive, and b. the mono- and di- metal salts, the mono- and di- ammonium salts and the mono- and di- amides of (a).
Claim 16
Dependent Claim
133 words
A corrosion inhibited antifreeze composition comprising a water soluble liquid alcohol freezing point depressant, an antifoam agent and an inhibitor, the inhibitor being present in the antifreeze composition in a minor but effective amount to inhibit the corrosion of solder alloys when intimately contacted therewith, and the inhibitor comprising at least one substance selected from the group consisting of a. compounds corresponding to the structural formula: ##SPC5## wherein R 1 is an alkylene radical containg from zero to 12 carbon atoms inclusive, R 2 is an alkyl radical containing from one to 10 carbon atoms inclusive and R 3 is an alkylene radical containing from one to 12 carbon atoms inclusive, and b. the mono- and di- metal salts, the mono- and di- ammonium salts and the mono- and di- amides of (a).
Claim 17
Dependent Claim
38 words
The antifreeze composition of claim 13 wherein R 1 contains from zero to four carbon atoms inclusive, R 2 contains from four to eight carbon atoms inclusive, and R 3 contains from five to nine carbon atoms inclusive.
Claim 18
Dependent Claim
11 words
The antifreeze composition of claim 13 wherein the inhibitor comprises 1-carboxy-2-hexyl-5-(7-carboxyheptyl)-cyclohex-3-ene.
Claim 19
Dependent Claim
19 words
The antifreeze composition of claim 13 wherein the inhibitor is present in an amount of about 0.01-1% by weight.
Claim 20
Dependent Claim
19 words
The antifreeze composition of claim 13 wherein the inhibitor is present in an amount of about 0.3-0.6% by weight.
Claim 21
Dependent Claim
19 words
The antifreeze composition of claim 13 wherein the inhibitor is present in an amount of about 0.3% by weight.
Claim 22
Dependent Claim
34 words
The antifreeze composition of claim 13 wherein the freezing point depressant comprises at least one water soluble alcohol containing from one to four carbon atoms inclusive and from one to four hydroxy atoms inclusive.
Claim 23
Dependent Claim
14 words
The antifreeze composition of claim 13 wherein the freezing point depressant comprises ethylene glycol.
Claim 24
Dependent Claim
20 words
The antifreeze composition of claim 13 wherein the antifoam agent comprises an alkoxylated nonionic surfactant which exhibits low foaming characteristics.
Claim 25
Dependent Claim
74 words
The antifreeze composition of claim 13 wherein the antifoam agent comprises a polyoxypropylenepolyoxyethylene block copolymer corresponding to the formula: HO(C.sub.2 H.sub.4 O).sub.a (C.sub.3 H.sub.6 O).sub.b (C.sub.2 H.sub.4 O).sub.c H wherein the copolymer has a molecular weight of from about 900 to 4,500 and a and c are of a size whereby the (C 2 H 4 O) groups comprise from zero to about 20% by weight of the total molecular weight of the copolymer.
Claim 26
Dependent Claim
33 words
The antifreeze composition of claim 1 wherein the freezing point depressant comprises ethylene glycol, R 1 contains zero carbon atoms, R 2 contains six carbon atoms and R 3 contains seven carbon atoms.
Claim 27
Dependent Claim
13 words
The antifreeze composition of claim 23 wherein an antifoam agent is also present.
Claim 28
Dependent Claim
20 words
The antifreeze composition of claim 24 wherein the antifoam agent comprises an alkoxylated nonionic surfactant which exhibits low foaming characteristics.
Claim 29
Dependent Claim
79 words
The antifreeze composition of claim 24 wherein the inhibitor comprises 1-carboxy-2-hexyl-5-(7-carboxyheptyl)-cyclohex-3-ene and the antifoam agent comprises a polyoxypropylene-polyoxyethylene block copolymer corresponding to the formula: HO(C.sub.2 H.sub.4 O).sub.a (C.sub.3 H.sub.6 O).sub.b (C.sub.2 H.sub.4 O).sub.c H wherein the copolymer has a molecular weight of from about 900 to 4,500 and a and c are of a size whereby the (C 2 H 4 O) groups comprise from zero to about 20% by weight of the total molecular weight of the copolymer.
Claim 30
Dependent Claim
19 words
The antifreeze composition of claim 26 wherein the inhibitor is present in an amount of about 0.3% by weight.
Claim 31
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 1.
Claim 32
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 3.
Claim 33
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 7.
Claim 34
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 9.
Claim 35
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 10.
Claim 36
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 13.
Claim 37
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 16.
Claim 38
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 20.
Claim 39
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 23.
Claim 40
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 24.
Claim 41
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 25.
Claim 42
Dependent Claim
40 words
A process for inhibiting the corrosion of solder alloys which are in intimate contact with an antifreeze composition which comprises intimately contacting the surface of the solder alloy to be inhibited against corrosion with the antifreeze composition of claim 27.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |