US4278733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy modified aniline-phenolic laminate
Assignee: BANKNORTH NA
•
Filing: 1979-07-23
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Granted: 1981-07-14
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Expires: 1999-07-23
Abstract
Abstract A laminate product and method of making the same involving a base material such as cellulose fibrous materials impregnated with a cured mixture of aniline, phenol, formaldehyde and epoxy resin, which laminate has electrical and mechanical properties with improved heat resistance over previous materials.
Inventors
- 👤 James R. Benzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:40
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/52; C; C08; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06; C08L; C08L63/00; D21H17/47; D21H17/48; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31725; Y10T428/31761; Y10T428/31786; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
A laminate product comprising a base material impregnated with a cured mixture of a first composition comprising two moles of aniline, about 5 to 28 moles of phenol and about 7 to 30 moles of formaldehyde and a second composition consisting essentially of an epoxy resin which is about 10% to 500% by weight of the first composition.
Claim 2
Dependent Claim
58 words
A laminate product comprising a base material impregnated with a cured mixture of a first composition comprising two moles of aniline, about 5 to 28 moles of phenol and about 7 to 30 moles of formaldehyde and a second composition consisting essentially of an epoxy resin which is about 10% to 500% by weight of the first composition.
Claim 3
Dependent Claim
17 words
A laminate product as stated in claim 1 wherein the base material is a cellulosic fibrous material.
Claim 4
Dependent Claim
28 words
A laminate product as stated in claim 1 wherein the first composition comprises two moles of aniline, about 7 moles of phenol, and about 10.5 moles of formaldehyde.
Claim 5
Dependent Claim
28 words
A laminate product as stated in claim 1 wherein the second composition comprises an epoxy phenolic novalac resin with an epoxy equivalent weight of about 176 to 181.
Claim 6
Dependent Claim
23 words
A laminate product as stated in claim 1 wherein the second composition is about 25% to 50% by weight of the first composition.
Claim 7
Independent Claim
98 words
A method of making a laminate product comprising: (a) Reacting a mixture comprising two moles of aniline, about 5 to 28 moles of phenol and about 7 to 30 moles of formaldehyde under reflux to produce a resole; (b) Separating said resole and adjusting the water content thereof to less than about 12% by weight; (c) Adding a solvent to said resole in an amount sufficient to bring the total solids content to about 50% by weight; (d) Adding essentially only epoxy resin to said mixture; and (e) Impregnating a base material with the composition from step (d).
Claim 8
Independent Claim
98 words
A method of making a laminate product comprising: (a) Reacting a mixture comprising two moles of aniline, about 5 to 28 moles of phenol and about 7 to 30 moles of formaldehyde under reflux to produce a resole; (b) Separating said resole and adjusting the water content thereof to less than about 12% by weight; (c) Adding a solvent to said resole in an amount sufficient to bring the total solids content to about 50% by weight; (d) Adding essentially only epoxy resin to said mixture; and (e) Impregnating a base material with the composition from step (d).
Claim 9
Dependent Claim
16 words
A method as stated in claim 6 wherein the base material is a cellulosic fibrous material.
Claim 10
Dependent Claim
27 words
A method as stated in claim 6 wherein the initial mixture comprises two moles of aniline, about 7 moles of phenol and about 10.5 moles of formaldehyde.
Claim 11
Dependent Claim
27 words
A method as stated in claim 6 wherein the epoxy resin is an epoxy phenolic novalac resin with an epoxy equivalent weight of about 176 to 181.
Claim 12
Dependent Claim
27 words
A method as stated in claim 6 wherein the epoxy resin is added in a weight of about 25% to 50% by weight of the initial mixture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |