US4273889A
Expired / Lapsed
US
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Thermosetting resin compositions and the cured products thereof
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1979-08-29
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Granted: 1981-06-16
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Expires: 1999-08-29
Abstract
Abstract The compositions composed by blending isopropenyl phenol linear polymers with epoxy resins containing at least two epoxy groups in one molecule, give cured products with excellent heat resistance and chemical resistance. With these compositions the curing speed is variable over an extremely broad range depending on the intended use, by optionally employing an accelerator.
Inventors
- 👤 Noboru Yamazaki
- 👤 Yoshio Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:17
CPC Classifications
C; C08; C08L; C08L63/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
65 words
Thermosetting resin compositions consisting essentially of a linear homopolymer of p-isopropenyl phenol having a polymerization degree of from 2 to about 418 and an epoxy resin having at least two epoxy groups and being present in such an amount that the ratio of the number of OH groups in the phenol to the number of epoxy groups in the resin ranges from 0.5 to 2.
Claim 2
Dependent Claim
65 words
Thermosetting resin compositions consisting essentially of a linear homopolymer of p-isopropenyl phenol having a polymerization degree of from 2 to about 418 and an epoxy resin having at least two epoxy groups and being present in such an amount that the ratio of the number of OH groups in the phenol to the number of epoxy groups in the resin ranges from 0.5 to 2.
Claim 3
Dependent Claim
14 words
The compositions of claim 1, in which the epoxy resins are bisphenolic epoxy resins.
Claim 4
Dependent Claim
15 words
The compositions of claim 1, in which the epoxy resins are halogenated bisphenolic epoxy resins.
Claim 5
Dependent Claim
15 words
The compositions of claim 1, in which the epoxy resins are novolak type epoxy resins.
Claim 6
Dependent Claim
14 words
The compositions of claim 1, in which the epoxy resins are polyglycolic epoxy resins.
Claim 7
Dependent Claim
14 words
The compositions of claim 1, in which the epoxy resins are alicyclic epoxy resins.
Claim 8
Dependent Claim
28 words
Thermosetting resin compositions as in claim 1 which are characterized in that they are composed essentially of linear polymers of isopropenyl phenol, epoxy resins and accelerators of curing.
Claim 9
Dependent Claim
28 words
Cured products which are characterized in that they are prepared by heat-setting the compositions of claim 1 composed essentially of linear polymers of isopropenyl phenol and epoxy resins.
Claim 10
Dependent Claim
31 words
Cured products which are characterized in that they are prepared by heat-setting the compositions of claim 1 composed essentially of linear polymers of isopropenyl phenol, epoxy resins and accelerators of curing.
Claim 11
Dependent Claim
40 words
Resin compositions as in claim 1 which are characterized in that they are composed essentially of linear polymers of isopropenyl phenol, epoxy resins and the compounds which generate free radicals or acids under heating, photo radiation or radiant ray radiation.
Claim 12
Dependent Claim
38 words
Cured products which are characterized in that they are prepared by heat-setting the compositions of claim 1 composed essentially of linear polymers of isopropenyl phenol, epoxy resins and the compounds which generate free radicals or acids upon heating.
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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |