US4046733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonic acid composition for forming thermoparticulating coating
Assignee: Westinghouse Electric Corp
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Filing: 1975-12-30
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Granted: 1977-09-06
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Expires: 1995-12-30
Abstract
Abstract A composition is disclosed of a sulfonic acid or amine salt thereof, a resinous carrier, and a solvent. The composition is applied to a portion of an electrical apparatus which is exposed to a gas stream. The solvent in the composition is evaporated to produce a thermoparticulating coating. When the electrical apparatus overheats the sulfonic acid or amine sulfonate in the coating forms particles in the gas stream which are detected by a monitor.
Inventors
- 👤 James D. B. Smith
- 👤 David C. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:28
CPC Classifications
G; G01; G01K; G01K11/00; C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C09; C09D; C09D163/00; C09D5/00; C09D5/26; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
45 words
A composition comprising 1. a thermoparticulating compound selected from the group consisting of sulfonic acids, amine salts of sulfonic acids, and mixtures thereof; and 2. a solution of a resinous carrier curable at room temperature, stable at 60° C., and unreactive with said thermoparticulating compound.
Claim 2
Dependent Claim
45 words
A composition comprising 1. a thermoparticulating compound selected from the group consisting of sulfonic acids, amine salts of sulfonic acids, and mixtures thereof; and 2. a solution of a resinous carrier curable at room temperature, stable at 60° C., and unreactive with said thermoparticulating compound.
Claim 3
Dependent Claim
36 words
A composition according to claim 1 wherein said thermoparticulating compound is selected from the group consisting of compounds having the general formula ##STR6## amine salts thereof, and mixtures thereof, where R is aryl or conjugated heterocyclic.
Claim 4
Dependent Claim
32 words
A composition according to claim 2 wherein said thermoparticulating compound is selected from the group consisting of toluene sulfonic acid, 3-pyridine sulfonic acids, naphthalene sulfonic acids, amine salts thereof, and mixtures thereof.
Claim 5
Dependent Claim
18 words
A composition according to claim 1 wherein said thermoparticulating compound is an amine salt of a sulfonic acid.
Claim 6
Dependent Claim
31 words
A composition according to claim 4 wherein said amine salt is selected from the group consisting of pyridinium benzenesulfonate, pyridinium p-toluene sulfonate, N,N-dimethylanilinium p-toluene sulfonate, benzyldimethylamino p-toluene sulfonate, and mixtures thereof.
Claim 7
Dependent Claim
29 words
A composition according to claim 1 wherein said thermoparticulating compound is selected from the group consisting of p-toluene sulfonic acid, benzene sulfonic acid, 1-naphthalene sulfonic acid, and mixtures thereof.
Claim 8
Dependent Claim
42 words
A composition according to claim 1 wherein the amount of said thermoparticulating compound is about 20 to about 250 phr and the amount of the solvent in said solution is about 25 to about 75% (by weight based on said resinous carrier).
Claim 9
Dependent Claim
39 words
A composition according to claim 7 wherein the amount of said thermoparticulating compound is about 40 to about 60 phr and the amount of said solvent is about 45 to about 55% (by weight based on said resinous carrier).
Claim 10
Dependent Claim
14 words
A composition according to claim 1 wherein said resinous carrier is an epoxy resin.
Claim 11
Dependent Claim
21 words
A composition according to claim 9 which includes about 0.1 to about 3 phr of a drier for said epoxy resin.
Claim 12
Dependent Claim
27 words
A composition according to claim 10 which is prepared by first mixing said solution of resinous carrier and said drier and then mixing in said thermoparticulating compound.
Claim 13
Dependent Claim
14 words
A composition according to claim 1 where the solvent in said solution is toluene.
Claim 14
Dependent Claim
15 words
A composition according to claim 1 wherein said thermoparticulating compound is dispersed in said solution.
Claim 15
Dependent Claim
30 words
A thermoparticulating coating comprising a solid layer of a cured resinous carrier containing an unreacted compound selected from the group consisting of sulfonic acids, their amine salts, and mixtures thereof.
Claim 16
Dependent Claim
30 words
A thermoparticulating coating comprising a solid layer of a cured resinous carrier containing an unreacted compound selected from the group consisting of sulfonic acids, their amine salts, and mixtures thereof.
Claim 17
Dependent Claim
15 words
A coating according to claim 14 which is about 1/16 to about 1/2 inches thick.
Claim 18
Dependent Claim
12 words
A composition according to claim 1 wherein said resinous carrier is air-dryable.
References Cited (Backward Citations)
US2687397A
Cited
US2909497A
Cited
US3427880A
Cited
US3705117A
Cited
US3678004A
Cited
US3807218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |