US4657689A
Expired / Lapsed
US
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Corrosion-inhibited antifreeze/coolant composition containing hydrocarbyl sulfonate
Assignee: Texaco Inc
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Filing: 1986-04-01
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Granted: 1987-04-14
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Expires: 2006-04-01
Abstract
Abstract A corrosion-inhibited liquid alcohol antifreeze/coolant composition comprising aliphatic C 5 -C 16 monobasic and C 5 -C 16 hydrocarbyl dibasic acids/salts, a hydrocarbyl azole, and a hydrocarbyl alkali metal sulfonate which is either a C 10 -C 20 alkyl benzene alkali metal sulfonate or a C 10 -C 20 alpha-olefin alkali metal sulfonate having an average molecular weight in the range 200-2000 is described. Aqueous corrosion-inhibited antifreeze/coolant compositions based on the above-described concentrate composition, where said concentrate is diluted with 10-90 weight percent water, are also described.
Inventors
- 👤 Jerome W. Darden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:05
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20; C23; C23F; C23F11/00; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
141 words
A corrosion-inhibited antifreeze composition for use in the cooling system of a water cooled internal combustion engine comprising: (a) from 80-99 weight percent of a water soluble liquid alcohol freezing point depressant; (b) from 0.1-15.0 weight percent of a C 5 -C 16 aliphatic monobasic acid or the alkali metal, ammonium, or amine salt of said acid; (c) from 0.1-15.0 weight percent of a C 5 -C 16 hydrocarbyl dibasic acid or the alkali metal, ammonium, or amine salt of said acid; (d) from 0.1-0.5 weight percent of a hydrocarbyl azole; and (e) from 0.1-0.5 weight percent of a hydrocarbyl alkali metal sulfonate selected from the group consisting of: (i) a C 10 -C 20 monoalkyl benzene alkali metal sulfonate; and (ii) a C 10 -C 20 alpha-olefin alkali metal sulfonate having an average molecular weight in the range of 200-2000.
Claim 2
Dependent Claim
141 words
A corrosion-inhibited antifreeze composition for use in the cooling system of a water cooled internal combustion engine comprising: (a) from 80-99 weight percent of a water soluble liquid alcohol freezing point depressant; (b) from 0.1-15.0 weight percent of a C 5 -C 16 aliphatic monobasic acid or the alkali metal, ammonium, or amine salt of said acid; (c) from 0.1-15.0 weight percent of a C 5 -C 16 hydrocarbyl dibasic acid or the alkali metal, ammonium, or amine salt of said acid; (d) from 0.1-0.5 weight percent of a hydrocarbyl azole; and (e) from 0.1-0.5 weight percent of a hydrocarbyl alkali metal sulfonate selected from the group consisting of: (i) a C 10 -C 20 monoalkyl benzene alkali metal sulfonate; and (ii) a C 10 -C 20 alpha-olefin alkali metal sulfonate having an average molecular weight in the range of 200-2000.
Claim 3
Dependent Claim
18 words
The corrosion-inhibited antifreeze composition of claim 1, in which said liquid alcohol freezing point depressant is ethylene glycol.
Claim 4
Dependent Claim
48 words
The corrosion inhibited antifreeze composition of claim 1, where said C 5 -C 16 aliphatic monobasic acid or salt is a C 8 -C 12 aliphatic monobasic acid or the alkali metal, ammonium, or amine salt of said acid, present in a concentration range of 0.1-5.0 weight percent.
Claim 5
Dependent Claim
39 words
The corrosion inhibited antifreeze composition of claim 3, where said C 8 -C 12 aliphatic monobasic acid is selected from the group consisting of octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, 2-ethylhexanoic acid, and neodecanoic acid.
Claim 6
Dependent Claim
48 words
The corrosion inhibited antifreeze composition of claim 1, where said C 5 -C 16 hydrocarbyl dibasic acid or salt is a C 8 -C 12 aliphatic dibasic acid or the alkali metal, ammonium, or amine salt of said acid, present in a concentration range of 0.1-5.0 weight percent.
Claim 7
Dependent Claim
39 words
The corrosion inhibited antifreeze composition of claim 5, where said C 8 -C 12 aliphatic dibasic acid is selected from the group consisting of: suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, and the diacid of dicyclopentadiene.
Claim 8
Dependent Claim
48 words
The corrosion inhibited antifreeze composition of claim 1, where said C 5 -C 16 hydrocarbyl dibasic acid or salt is a C 8 -C 12 aromatic dibasic acid or the alkali metal, ammonium, or amine salt of said acid, present in a concentration range of 0.1-5.0 weight percent.
Claim 9
Dependent Claim
20 words
The corrosion inhibited antifreeze composition of claim 7, where said C 8 -C 12 aromatic dibasic acid is terephthalic acid.
Claim 10
Dependent Claim
25 words
The corrosion inhibited antifreeze composition of claim 1, where said hydrocarbyl azole is tolyltriazole or benzotriazole, present in a concentration range of 0.1-0.3 weight percent.
Claim 11
Dependent Claim
53 words
The corrosion inhibited antifreeze composition of claim 1, in which an additional corrosion inhibitor is also employed at concentrations of 0.01-5.0 weight percent, and is selected from the group consisting of alkali metal hydroxides, alkali metal borates, alkali metal silicates, alkali metal benzoates, alkali metal nitrates, alkali metal nitrites, and alkali metal molybdates.
Claim 12
Dependent Claim
20 words
The corrosion inhibited antifreeze composition of claim 1, in which said alkyl benzene alkali metal sulfonate is sodium dodecylbenzene sulfonate.
Claim 13
Dependent Claim
36 words
The corrosion inhibited antifreeze composition of claim 1, in which said alpha olefin alkali metal sulfonate is a C 14 -C 16 sodium alpha olefin sulfonate, having an average molecular weight in the range of 300-500.
Claim 14
Dependent Claim
21 words
The corrosion inhibited antifreeze composition of claim 1, where said antifreeze composition is diluted with from 10-90 weight percent of water.
Claim 15
Dependent Claim
21 words
The corrosion inhibited antifreeze composition of claim 13, where said antifreeze composition is diluted with from 25-75 weight percent of water.
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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) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |