US3970723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnating and encapsulating composition for use with type transformers and transformers containing such composition
Assignee: General Electric Co
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Filing: 1974-07-31
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Granted: 1976-07-20
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Expires: 1994-07-31
Abstract
Abstract A solventless resin composition comprising 100 parts by weight of a particular butadiene polymer, from 10 to 34 parts by weight of a vinyl monomer selected from the group consisting of t-butyl styrene and vinyl toluene, and from 5 to 11 parts, by weight, of an accelerating agent selected from the group consisting of trimethylol propane trimethacrylate, diallyl malleate, diallyl phthalate, and dioctyl fumarate is effective as a solventless impregnant or encapsulant for a dry type transformer.
Inventors
- 👤 Robert D. Mees
- 👤 Gordon M. Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:25
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; C; C08; C08F; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
104 words
A resin system for use in the insulation of electrical equipment comprising the reaction product of: a. 100 parts of a butadiene polymer having the formula: ##EQU7## where a is from 0.40 to 0.80, b is from 0.10 to 0.20, and c is from 0.15 to 0.35, the sum of a, b, and c being sufficient for the polymer to have a molecular weight of from 1700 to 2100; b. from 10 to 34 parts, by weight, of a vinyl monomer selected from the class consisting of t-butyl styrene and vinyl toluene; and c. from 5 to 11 parts, by weight, trimethylol propane trimethacrylate.
Claim 2
Dependent Claim
104 words
A resin system for use in the insulation of electrical equipment comprising the reaction product of: a. 100 parts of a butadiene polymer having the formula: ##EQU7## where a is from 0.40 to 0.80, b is from 0.10 to 0.20, and c is from 0.15 to 0.35, the sum of a, b, and c being sufficient for the polymer to have a molecular weight of from 1700 to 2100; b. from 10 to 34 parts, by weight, of a vinyl monomer selected from the class consisting of t-butyl styrene and vinyl toluene; and c. from 5 to 11 parts, by weight, trimethylol propane trimethacrylate.
Claim 3
Dependent Claim
18 words
The resin system of claim 1, having, in addition, from 1 to 3 parts of a peroxide catalyst.
Claim 4
Dependent Claim
12 words
The resin system of claim 2, wherein the peroxide catalyst is: ##EQU8##
Claim 5
Dependent Claim
21 words
The resin system of claim 1, having, in addition, a polymerization inhibitor selected from the class consisting of quinones and hydroquinones.
Claim 6
Dependent Claim
11 words
The resin system of claim 4, wherein the inhibitor is hydroquinone.
Claim 7
Dependent Claim
13 words
The resin system of claim 1, wherein the vinyl monomer is t-butyl styrene.
Claim 8
Dependent Claim
13 words
The resin system of claim 1, wherein the vinyl monomer is vinyl toluene.
Claim 9
Dependent Claim
108 words
A dry type transformer having, as a portion of the electrical insulation, a resin system comprising the reaction product of: a. 100 parts of a butadiene polymer having the formula: ##EQU9## where a is from 0.40 to 0.80, b is from 0.10 to 0.20, and c is from 0.15 to 0.35, the sum of a, b, and c being sufficient for the polymer to have a molecular weight of from 1700 to 2100; b. from 10 to 34 parts, by weight, of a vinyl monomer selected from the class consisting of t-butyl styrene and vinyl toluene; and c. from 5 to 11 parts, by weight, trimethylol propane trimethacrylate.
Claim 10
Dependent Claim
108 words
A dry type transformer having, as a portion of the electrical insulation, a resin system comprising the reaction product of: a. 100 parts of a butadiene polymer having the formula: ##EQU9## where a is from 0.40 to 0.80, b is from 0.10 to 0.20, and c is from 0.15 to 0.35, the sum of a, b, and c being sufficient for the polymer to have a molecular weight of from 1700 to 2100; b. from 10 to 34 parts, by weight, of a vinyl monomer selected from the class consisting of t-butyl styrene and vinyl toluene; and c. from 5 to 11 parts, by weight, trimethylol propane trimethacrylate.
Claim 11
Dependent Claim
17 words
The invention of claim 8, having, in addition, from 1 to 3 parts of a peroxide catalyst.
Claim 12
Dependent Claim
11 words
The invention of claim 9, wherein the peroxide catalyst is: ##EQU10##
Claim 13
Dependent Claim
20 words
The invention of claim 10, having, in addition, a polymerization inhibitor selected from the class consisting of quinones and hydroquinones.
Claim 14
Dependent Claim
10 words
The invention of claim 11, wherein the inhibitor is hydroquinone.
Claim 15
Dependent Claim
12 words
The invention of claim 12, wherein the vinyl monomer is t-butyl styrene.
Claim 16
Dependent Claim
12 words
The invention of claim 13, wherein the vinyl monomer is vinyl toluene.
References Cited (Backward Citations)
US3678121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |