US4254187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper plies impregnated with oil modified phenolic resole varnish
Assignee: General Electric Co
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Filing: 1976-11-29
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Granted: 1981-03-03
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Expires: 1996-11-29
Abstract
Abstract The invention relates to oil-modified phenolic resole varnishes particularly useful for impregnating paper laminates. Specifically, the invention relates to such compositions in which an economical and useful mixture of alcohols is used as the reaction medium for the resole formation. Laminates prepared using the varnish are characterized by salutary qualities.
Inventors
- 👤 LeRoy A. Claybaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:50
CPC Classifications
B; B32; B32B; B32B29/00; B32B29/06; B32B29/002; C; C08; C08G; C08G8/00; C08G8/28; C08G8/32; C08L; C08L61/00; C08L61/04; C08L61/06; C08L61/14; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; B32B2250/00; B32B2250/26; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31844; Y10T428/31848; Y10T428/31851; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A laminate of a plurality of paper plies having as the impregnating varnish a product made by (a) reacting a phenol moiety with tung oil in the presence of strong acid and (b) reacting the product of (a) in an alcohol solvent with an aldehyde moiety in the presence of an amine catalyst using as the alcohol solvent a mixture consisting of, by weight, from 15 to 50 percent methyl alcohol and 85 to 50 percent isopropyl alcohol, the reaction product of (b) being dissolved in a solvent.
Claim 2
Dependent Claim
88 words
A laminate of a plurality of paper plies having as the impregnating varnish a product made by (a) reacting a phenol moiety with tung oil in the presence of strong acid and (b) reacting the product of (a) in an alcohol solvent with an aldehyde moiety in the presence of an amine catalyst using as the alcohol solvent a mixture consisting of, by weight, from 15 to 50 percent methyl alcohol and 85 to 50 percent isopropyl alcohol, the reaction product of (b) being dissolved in a solvent.
Claim 3
Dependent Claim
17 words
The product of claim 1 where said phenol moiety is a mixture of phenol and cresylic acid.
Claim 4
Dependent Claim
16 words
A laminate as in claim 1 wherein said acid is selected from sulfuric and phosphoric acids.
Claim 5
Dependent Claim
12 words
A laminate as in claim 1 wherein said aldehyde moiety is paraformaldehyde.
Claim 6
Dependent Claim
17 words
A laminate as in claim 1 wherein said amine is selected from 1,3-propane diamine and ethylene diamine.
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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |