US4466896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylenediamine triacetic acid siloxane stabilizers for inorganic silicates in antifreeze/coolant formulations
Assignee: Huntsman Corp
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Filing: 1983-07-29
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Granted: 1984-08-21
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Expires: 2003-07-29
Abstract
Abstract Stabilizers for inorganic silicate corrosion inhibitor additives in antifreeze/coolant formulations are described. The stabilizers are organosiloxanes which have ethylenediamine triacetic acid moieties as the solubilizing group. A particularly preferred stabilizer is N-(trimethoxysilylpropyl)ethylenediamine triacetic acid, <IMAGE> These stabilizers help prevent the corrosion-inhibiting silicate additives from precipitating out and thus extend the shelf life of antifreeze formulations into which they are incorporated.
Inventors
- 👤 Jerome W. Darden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:19
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
67 words
A gellation resistant aqueous glycol composition comprising (a) 85 to 98 percent by weight of a glycol component selected from the group consisting of an alkylene glycol, an alkylene glycol ether and mixtures thereof, (b) an effective amount to reduce corrosion of an inorganic alkali metal silicate, and (c) an effective amount to improve gellation resistance of an organosiloxane having ethylenediamine triacetic acid as a solubilizing group.
Claim 2
Dependent Claim
67 words
A gellation resistant aqueous glycol composition comprising (a) 85 to 98 percent by weight of a glycol component selected from the group consisting of an alkylene glycol, an alkylene glycol ether and mixtures thereof, (b) an effective amount to reduce corrosion of an inorganic alkali metal silicate, and (c) an effective amount to improve gellation resistance of an organosiloxane having ethylenediamine triacetic acid as a solubilizing group.
Claim 3
Dependent Claim
13 words
The composition of claim 1 in which the alkylene glycol is ethylene glycol.
Claim 4
Dependent Claim
24 words
The composition of claim 1 in which the remainder of the composition is water and an effective amount of one or more corrosion inhibitors.
Claim 5
Dependent Claim
23 words
The composition of claim 1 in which the amount of organosiloxane ranges from about 100 to 10,000 ppm based on the total composition.
Claim 6
Dependent Claim
51 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 inorganic alkali metal silicate, and (c) an effective amount to improve gellation resistance of N-(trimethoxysilylpropyl)ethylenediamine triacetic acid.
Claim 7
Dependent Claim
51 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 inorganic alkali metal silicate, and (c) an effective amount to improve gellation resistance of N-(trimethoxysilylpropyl)ethylenediamine triacetic acid.
Claim 8
Dependent Claim
13 words
The composition of claim 5 in which the alkylene glycol is ethylene glycol.
Claim 9
Dependent Claim
25 words
The composition of claim 5 in which the remainder of the composition is water and an effective amount of one or more other corrosion inhibitors.
Claim 10
Dependent Claim
25 words
The composition of claim 5 in which the amount of N-(trimethoxysilylpropyl)ethylenediamine triacetic acid ranges from about 100 to 10,000 ppm based on the total composition.
Claim 11
Independent Claim
76 words
A method for improving the gellation resistance of a corrosion inhibited aqueous glycol composition comprising adding to (a) a glycol composition comprising 85 to 98 percent by weight of a glycol component selected from the group consisting of an alkylene glycol, an alkylene glycol ether and mixtures thereof, and an effective amount to reduce corrosion of an inorganic alkali metal silicate, (b) an effective amount of an organosiloxane having ethylenediamine triacetic acid as a solubilizing group.
Claim 12
Independent Claim
76 words
A method for improving the gellation resistance of a corrosion inhibited aqueous glycol composition comprising adding to (a) a glycol composition comprising 85 to 98 percent by weight of a glycol component selected from the group consisting of an alkylene glycol, an alkylene glycol ether and mixtures thereof, and an effective amount to reduce corrosion of an inorganic alkali metal silicate, (b) an effective amount of an organosiloxane having ethylenediamine triacetic acid as a solubilizing group.
Claim 13
Dependent Claim
13 words
The method of claim 9 in which the organosiloxane is N-(trimethoxysilylpropyl)ethylenediamine triacetic acid.
Claim 14
Dependent Claim
24 words
The method of claim 9 in which the amount of organosiloxane compound ranges from about 100 to 10,000 ppm based on the total composition.
Claim 15
Dependent Claim
13 words
The method of claim 9 in which the alkylene glycol is ethylene glycol.
Claim 16
Dependent Claim
24 words
The method of claim 9 in which the remainder of the composition is water and an effective amount of one or more corrosion inhibitors.
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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |