US4179429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminates prepared from resol-type phenol resins
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1978-01-19
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Granted: 1979-12-18
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Expires: 1998-01-19
Abstract
Abstract A new resol-type phenol resin is described which is obtained by heat-reacting isopropenylphenol oligomer as partial or whole phenol component of the resin with an aldehyde in the presence of a basic catalyst. Varnishes are obtained by adding a suitable vehicle to the resin. Laminates manufactured by impregnating a base with the phenol resin and heating the impregnated base to cure the resin are obtained with superior mechanical and electrical characteristics.
Inventors
- 👤 Kunio Hanauye
- 👤 Tsutomu Takase
- 👤 Yoshio Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:51
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/24; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
76 words
A laminate prepared from the product of a basic-catalyst-catalyzed reaction of, based on the total weight of the phenol components of said a resol-type phenol resin, 2-60% of a dimer of isopropenyl phenol of the formula selected from: ##STR7## and 40-98% of other phenolic compounds selected from the group consisting of phenol, alkyl phenols having from 1 to 20 carbon atoms in the alkyl group, bisphenol-A, phenylphenols, cumyl phenol, styrenated phenols, catechol and resorcinol with formaldehyde.
Claim 2
Dependent Claim
76 words
A laminate prepared from the product of a basic-catalyst-catalyzed reaction of, based on the total weight of the phenol components of said a resol-type phenol resin, 2-60% of a dimer of isopropenyl phenol of the formula selected from: ##STR7## and 40-98% of other phenolic compounds selected from the group consisting of phenol, alkyl phenols having from 1 to 20 carbon atoms in the alkyl group, bisphenol-A, phenylphenols, cumyl phenol, styrenated phenols, catechol and resorcinol with formaldehyde.
Claim 3
Dependent Claim
31 words
The laminate according to claim 1, wherein said resol-type phenol resin further includes a vehicle selected from alcohols, ketones and aromatic hydrocarbons in amount of from 20 to 90% by weight.
Claim 4
Dependent Claim
23 words
The laminate according to claim 1, wherein said resol-type phenol resin reaction product is made from formaldehyde, isopropenyl phenol dimer, phenol and nonylphenol.
Claim 5
Dependent Claim
18 words
A laminate consisting of a plurality of superposed bases impregnated with said resol-type phenol resin of claim 1.
References Cited (Backward Citations)
US2006043A
Cited
US2587578A
Cited
US2907751A
Cited
US3294746A
Cited
US3758597A
Cited
DE2647321A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |