US3973439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal acetyl acetonate composition for forming thermoparticulating coating
Assignee: Westinghouse Electric Corp
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Filing: 1975-04-15
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Granted: 1976-08-10
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Expires: 1995-04-15
Abstract
Abstract A composition is disclosed of a metal acetylacetonate, 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 metal acetylacetonate 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
2026-10-25 20:24
CPC Classifications
G; G01; G01K; G01K11/00; C; C09; C09D; C09D5/00; C09D5/26; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/269
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
110 words
A method of protecting electrical apparatus from damage due to overheating and for thereafter determining the location of said overheating, said apparatus including a gas stream and a monitor for detecting particles in said gas stream and for emitting a signal when said particles are detected, comprising: A. preparing a composition which comprises at least one metal acetylacetonate and a solution of a resinous carrier curable and stable at 60°C, and unreactive with said metal acetylacetonate; B. applying said composition to said electrical apparatus at positions exposed to said gas stream; C. evaporating the solvent in said solution; and D. monitoring said gas stream for the presence of particles therein.
Claim 2
Independent Claim
110 words
A method of protecting electrical apparatus from damage due to overheating and for thereafter determining the location of said overheating, said apparatus including a gas stream and a monitor for detecting particles in said gas stream and for emitting a signal when said particles are detected, comprising: A. preparing a composition which comprises at least one metal acetylacetonate and a solution of a resinous carrier curable and stable at 60°C, and unreactive with said metal acetylacetonate; B. applying said composition to said electrical apparatus at positions exposed to said gas stream; C. evaporating the solvent in said solution; and D. monitoring said gas stream for the presence of particles therein.
Claim 3
Dependent Claim
102 words
A method according to claim 1 wherein said metal acetylacetonate has the general formula: ##STR3## where each R is independently selected from the group consisting of hydrogen, alkyl to C 4 , alkenyl to C 4 , phenyl, substituted phenyl, and mixtures thereof, R 1 is selected from the group consisting of ##STR4## M is an element selected from the group of elements having atomic numbers 12 to 13, 21 to 30, and 39 to 51, m is an integer from 0 to 1, n is an integer selected from 1 to 3, and p is an integer from 0 to 3.
Claim 4
Dependent Claim
14 words
A method according to claim 2 wherein each R is -- CH 3 .
Claim 5
Dependent Claim
14 words
A method according to claim 2 wherein R 1 is -- CH 2 --.
Claim 6
Dependent Claim
40 words
A method according to claim 2 wherein M is selected from the group consisting of Zn.sup. +2 , Co.sup. +2 , Co.sup. +3 , Cu.sup. +2 , Cr.sup. +3 , Ni.sup. +2 , Mn.sup. +2 , and Mn.sup. +3 .
Claim 7
Dependent Claim
12 words
A method according to claim 1 wherein said acetylacetonate is zinc acetylacetonate.
Claim 8
Dependent Claim
41 words
A method according to claim 1 wherein the amount of said 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
38 words
A method according to claim 7 wherein the amount of said 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 method according to claim 1 wherein said resinous carrier is an epoxy resin.
Claim 11
Dependent Claim
21 words
A method according to claim 9 which includes about 0.1 to about 3 phr of a drier for said epoxy resin.
Claim 12
Dependent Claim
28 words
A method according to claim 10 wherein said composition is prepared by first mixing said solution of resinous carrier and said drier and then mixing in said acetylacetonate.
Claim 13
Dependent Claim
14 words
A method according to claim 1 wherein the solvent in said solution is toluene.
Claim 14
Dependent Claim
14 words
A method according to claim 1 wherein said acetylacetonate is dispersed in said solution.
Claim 15
Dependent Claim
12 words
A method according to claim 1 wherein said resinous carrier is air-dryable.
Claim 16
Dependent Claim
33 words
A method according to claim 1 including the additional last step of inspecting said apparatus visually for blistered and darkened areas, after a signal has been emitted, to locate the area of overheating.
Claim 17
Dependent Claim
30 words
A method according to claim 1 including the additional last steps of collecting a sample of said gas stream after a signal has been emitted, and chemically analyzing said sample.
Claim 18
Dependent Claim
57 words
A thermal detection system for electrical apparatus cooled by a gas stream, comprising: A. a coating on a portion of said electrical apparatus exposed to said gas stream, said coating comprising a solid layer of a cured resinous carrier containing a metal acetylacetonate; and B. a monitor for detecting the presence of particles in said gas stream.
Claim 19
Dependent Claim
57 words
A thermal detection system for electrical apparatus cooled by a gas stream, comprising: A. a coating on a portion of said electrical apparatus exposed to said gas stream, said coating comprising a solid layer of a cured resinous carrier containing a metal acetylacetonate; and B. a monitor for detecting the presence of particles in said gas stream.
Claim 20
Dependent Claim
104 words
A thermal detection system according to claim 17 wherein said metal acetylacetonate has the general formula: ##STR5## where each R is independently selected from the group consisting of hydrogen, alkyl to C 4 , alkenyl to C 4 , phenyl, substituted phenyl, and mixtures thereof, R 1 is selected from the group consisting of ##STR6## M is an element selected from the group of elements having atomic numbers 12 to 13, 21 to 30, and 39 to 51, m is an integer from 0 to 1, n is an integer selected from 1 to 3, and p is an integer from 0 to 3.
Claim 21
Dependent Claim
16 words
A thermal detection system according to claim 18 wherein each R is -- CH 3 .
Claim 22
Dependent Claim
16 words
A thermal detection system according to claim 18 wherein R 1 is -- CH 2 --.
Claim 23
Dependent Claim
42 words
A thermal detection system according to claim 18 wherein M is selected from the group consisting of Zn.sup. +2 , Co.sup. +2 , Co.sup. +3 , Cu.sup. +2 , Cr.sup. +3 , Ni.sup. +2 , Mn.sup. +2 , and Mn.sup. +3 .
Claim 24
Dependent Claim
14 words
A thermal detection system according to claim 17 wherein said acetylacetonate is zinc acetylacetonate.
Claim 25
Dependent Claim
16 words
A thermal detection system according to claim 17 wherein said resinous carrier is an epoxy resin.
Claim 26
Dependent Claim
23 words
A thermal detection system according to claim 23 which includes about 0.1 to about 3 phr of a drier for said epoxy resin.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |