US3940356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ice release agents consisting of pseudo-plastic compositions of crosslinked polyacrylic acid in water-polyglycol mixture
Assignee: Union Carbide Corp
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Filing: 1974-11-29
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Granted: 1976-02-24
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Expires: 1994-11-29
Abstract
Abstract Ice release agents are formulated from alkylene glycols having two to three carbon atoms, water, an alkanol and a salt of crosslinked polyacrylic acid.
Inventors
- 👤 Peter G. Byrnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
Ice release composition which is effective on non-horizontal substrate surfaces comprising: a. a mixture of an alkylene glycol having two to three carbon atoms and water in a glycol:water weight ratio of about 20:80 to about 90:10. b. about 0.05 to about 1.0 parts of crosslinked polyacrylic acid per 100 parts of (a); c. sufficient base to neutralize the crosslinked polyacrylic acid, said base selected from the class consisting of alkali metal hydroxides, ammonium hydroxide, alkyl amines having 4 to 12 carbon atoms, alkanolamines having 2 to 12 carbon atoms and morpholine; and d. about 50 to about 100 parts of an alkanol, having one to three carbon atoms, per 100 parts of the combination of (a), (b) and (c).
Claim 2
Dependent Claim
120 words
Ice release composition which is effective on non-horizontal substrate surfaces comprising: a. a mixture of an alkylene glycol having two to three carbon atoms and water in a glycol:water weight ratio of about 20:80 to about 90:10. b. about 0.05 to about 1.0 parts of crosslinked polyacrylic acid per 100 parts of (a); c. sufficient base to neutralize the crosslinked polyacrylic acid, said base selected from the class consisting of alkali metal hydroxides, ammonium hydroxide, alkyl amines having 4 to 12 carbon atoms, alkanolamines having 2 to 12 carbon atoms and morpholine; and d. about 50 to about 100 parts of an alkanol, having one to three carbon atoms, per 100 parts of the combination of (a), (b) and (c).
Claim 3
Dependent Claim
12 words
Composition claimed in claim 1 wherein the alkylene glycol is ethylene glycol.
Claim 4
Dependent Claim
12 words
Composition claimed in claim 1 wherein the alkylene glycol is 1,2-propylene glycol.
Claim 5
Dependent Claim
11 words
Composition claimed in claim 1 wherein the base is sodium hydroxide.
Claim 6
Dependent Claim
10 words
Composition claimed in claim 1 wherein the base is triisopropanolamine.
Claim 7
Dependent Claim
10 words
Composition claimed in claim 4 wherein the alkanol is methanol.
Claim 8
Dependent Claim
10 words
Composition claimed in claim 5 wherein the alkanol is ethanol.
Claim 9
Dependent Claim
10 words
Composition claimed in claim 1 wherein the alkanol is isopropanol.
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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |