US3884992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting resin containing epoxy resin and polyhydroxystyrene
Assignee: Cosmo Oil Co Ltd
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Filing: 1973-11-01
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Granted: 1975-05-20
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Expires: 1993-11-01
Abstract
Abstract Thermosetting resin compositions comprising polyhydroxystyrene and an epoxy resin and which can be changed into hardened products having excellent heat resistance. In the hardening of the thermosetting resin compositions under heat, no catalyst or hardening accelerator are needed and hardened products having excellent heat resistance can be obtained therefrom.
Inventors
- 👤 Masaru Shimizu
- 👤 Hiroshi Fujiwara
- 👤 Shinji Iwai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:04
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; C; C08; C08L; C08L25/00; C08L25/18; C08L63/00; C09; C09D; C09D125/00; C09D125/18
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
63 words
A THERMOSETTING RESIN COMPOSITION COMPRISING A POLYHYDROXYSTYRENE HAVING A DEGREE OF POLYMERIZATION OF FROM 4 TO 70,000 AND AN EPOXY RESIN COMPRISING AN EPOXY COMPOUND HAVING AT LEAST 2 EPOXY GROUPS PER MOLECULE, WHEREIN THE RATIO OF THE NUMBER OF HYDROXYL GROUPS IN SAID POLYHYDROXYSTYRENE TO THE NUMBER OF EPOXY GROUPS IN SAID EPOXY RESIN IS IN THE RANGE OF 0.5 - 5.0.
Claim 2
Dependent Claim
63 words
A THERMOSETTING RESIN COMPOSITION COMPRISING A POLYHYDROXYSTYRENE HAVING A DEGREE OF POLYMERIZATION OF FROM 4 TO 70,000 AND AN EPOXY RESIN COMPRISING AN EPOXY COMPOUND HAVING AT LEAST 2 EPOXY GROUPS PER MOLECULE, WHEREIN THE RATIO OF THE NUMBER OF HYDROXYL GROUPS IN SAID POLYHYDROXYSTYRENE TO THE NUMBER OF EPOXY GROUPS IN SAID EPOXY RESIN IS IN THE RANGE OF 0.5 - 5.0.
Claim 3
Dependent Claim
22 words
The thermosetting resin composition as claimed in claim 1, wherein said polyhydroxystyrene has a degree of polymerization of from 4 to 150.
Claim 4
Dependent Claim
74 words
The thermosetting resin composition as claimed in claim 1, wherein said epoxy resin is selected from the group consisting of bisphenol type epoxy resins, novolak type epoxy resins, resole type epoxy resins, polyphenol type epoxy resins, polyhydroxybenzene type epoxy resins, polyglycol type epoxy resins, carboxylic acid type epoxy resins, cycloaliphatic epoxy resins, nitrogen-containing epoxy resins and diene type epoxy resins, and wherein said polyhydroxystyrene is a polymer of o-hydroxystyrene, m-hydroxystyrene, p-hydroxystyrene or mixtures thereof.
Claim 5
Dependent Claim
19 words
The thermosetting resin composition as claimed in claim 3, wherein said epoxy resin is a bisphenol type epoxy resin.
Claim 6
Dependent Claim
23 words
The thermosetting resin composition as claimed in claim 4, wherein said epoxy resin is comprises the reaction product of bisphenol A and epichlorohydrin.
Claim 7
Dependent Claim
19 words
The thermosetting resin composition as claimed in claim 3, wherein said epoxy resin is a novolak type epoxy resin.
Claim 8
Dependent Claim
23 words
The thermosetting resin composition as claimed in claim 6 wherein said epoxy resin is comprises the reaction product of a novolak and epichlorohydrin.
Claim 9
Dependent Claim
18 words
The thermosetting resin composition as claimed in claim 3, wherein said epoxy resin is a cycloaliphatic epoxy resin.
Claim 10
Dependent Claim
17 words
The thermosetting resin composition as claimed in claim 8, wherein said epoxy resin has the following formula:
Claim 11
Dependent Claim
17 words
The thermosetting resin composition as claimed in claim 8, wherein said epoxy resin has the following formula:
Claim 12
Dependent Claim
24 words
The thermosetting resin composition as claimed in claim 1, wherein said composition comprises an organic solvent solution of said polyhydroxystyrene and said epoxy resin.
Claim 13
Dependent Claim
39 words
The thermosetting resin composition as claimed in claim 1, wherein the ratio of the number of hydroxyl groups in said polyhydroxystyrene to the number of epoxy groups in said epoxy resin is in the range of 0.8 to 5.0.
Claim 14
Dependent Claim
34 words
The thermosetting resin composition as claimed in claim 1, wherein said composition contains at least one of a catalyst, a hardening accelerator, a dyestuff, a pigment, a plasticizer, a reinforcing agent or a filler.
Claim 15
Dependent Claim
15 words
The thermosetting resin composition as claimed in claim 13, wherein said hardening accelerator is p-dimethylamino-benzaldehyde.
Claim 16
Dependent Claim
34 words
The thermosetting resin composition as claimed in claim 11, wherein said composition contains at least one of a catalyst, a hardening accelerator, a dyestuff, a pigment, a plasticizer, a reinforcing agent and a filler.
Claim 17
Independent Claim
85 words
A method for preparing a heat resistant hardened product comprising heating a thermosetting resin composition comprising a polyhydroxystyrene having a degree of polymerization of 4 to 70, 000 and an epoxy resin having at least two epoxy groups per molecule, wherein the ratio of the number of hydroxyl groups in said polyhydroxystyrene to the number of epoxy groups in said epoxy resin is in the range of 0.5 to 5.0, at a temperature ranging from 150*C to below the decomposition temperature of said hardened product.
Claim 18
Independent Claim
85 words
A method for preparing a heat resistant hardened product comprising heating a thermosetting resin composition comprising a polyhydroxystyrene having a degree of polymerization of 4 to 70, 000 and an epoxy resin having at least two epoxy groups per molecule, wherein the ratio of the number of hydroxyl groups in said polyhydroxystyrene to the number of epoxy groups in said epoxy resin is in the range of 0.5 to 5.0, at a temperature ranging from 150*C to below the decomposition temperature of said hardened product.
Claim 19
Dependent Claim
33 words
The method of claim 16 wherein the ratio of hydroxyl groups in said polyhydroxy styrene to the number of epoxy groups in said epoxy resin is in the range of 0.8 to 5.0
References Cited (Backward Citations)
CA676534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |