Patent US4131632A successfully refreshed from Google Patents.
US4131632A
Expired / Lapsed
US
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Heat-resistant resin compositions
Assignee: Toshiba Corp
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Filing: 1977-09-27
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Granted: 1978-12-26
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Expires: 1997-09-27
Abstract
Abstract Resin compositions comprising maleimide compounds obtained by reacting maleic anhydride with mixed polyamines produced by reaction between aniline and formaldehyde; diallylbisphenol compounds; and epoxy resins. The compositions display prominent heat resistance when hardened.
Inventors
- 👤 Shuichi Suzuki
- 👤 Moriyasu Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:44
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/121
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
156 words
A heat-resistant resin composition which comprises (A) at least one maleimide polymer obtained by reacting maleic anhydride with polyphenyl polyamines containing the repeating units represented by the formula ##STR9## wherein said polyphenyl polyamines have 1 to 5 aniline units and have an amine content of 15 to 16.5% by weight and wherein said polyphenyl polyamines are produced by reaction between aniline and formaldehyde; and wherein in said reaction between maleic anhydride and polyphenyl polyamine, the ratio of amine equivalent to acid equivalent is 1:1 to 1:2; (B) at least one allylbisphenol compound represented by the formula: ##STR10## where R is -CH 2 -radical or ##STR11## m and n are each independently zero, or an integer of 1, 2 or 3; each of the allyl groups is positioned ortho to each of the hydroxy groups, and in the case where R is ##STR12## group, m and n respectively denote zero; and (C) at least one epoxy resin.
Claim 2
Dependent Claim
156 words
A heat-resistant resin composition which comprises (A) at least one maleimide polymer obtained by reacting maleic anhydride with polyphenyl polyamines containing the repeating units represented by the formula ##STR9## wherein said polyphenyl polyamines have 1 to 5 aniline units and have an amine content of 15 to 16.5% by weight and wherein said polyphenyl polyamines are produced by reaction between aniline and formaldehyde; and wherein in said reaction between maleic anhydride and polyphenyl polyamine, the ratio of amine equivalent to acid equivalent is 1:1 to 1:2; (B) at least one allylbisphenol compound represented by the formula: ##STR10## where R is -CH 2 -radical or ##STR11## m and n are each independently zero, or an integer of 1, 2 or 3; each of the allyl groups is positioned ortho to each of the hydroxy groups, and in the case where R is ##STR12## group, m and n respectively denote zero; and (C) at least one epoxy resin.
Claim 3
Dependent Claim
21 words
The heat-resistant resin composition according to claim 1, wherein said polyphenylpolyamines have a viscosity ranging between out 2,000 and 5,000 centipoises.
Claim 4
Dependent Claim
20 words
The heat-resistant resin composition according to claim 1, wherein said polyphenylpolyamines have a viscosity ranging between 8,000 and 30,000 centiposes.
Claim 5
Dependent Claim
25 words
The heat-resistant resin composition according to claim 2, wherein the amine radical content of the polyphenylpolyamines ranges between 15.5% by weight and 16.2% by weight.
Claim 6
Dependent Claim
24 words
The heat-resistant resin composition according to claim 3, where the polyphenylpolyamines is reacted with maleic anhydride in the equivalent ratio of 1:1 or more.
Claim 7
Dependent Claim
25 words
The heat-resistant resin composition according to claim 3, wherein the polyphenylpolyamine is reacted with maleic anhydride in the equivalent ratio ranging between 1:1.1 and 1:2.
Claim 8
Dependent Claim
25 words
The heat-resistant resin composition according to claim 1, wherein said maleimide polymer has a melting point ranging between about 80° C and about 130° C.
Claim 9
Dependent Claim
12 words
The heat-resistant resin composition according to claim 2, wherein R is ##STR13##
Claim 10
Dependent Claim
15 words
The heat-resistant resin composition according to claim 2, wherein R is --CH 2 -- group.
Claim 11
Dependent Claim
19 words
The heat-resistant resin composition according to claim 9, wherein m and n have a total of zero to four.
Claim 12
Dependent Claim
22 words
The heat-resistant resin composition according to claim 1, wherein the epoxy resin is produced by reaction between the component B and epihalohydrin.
Claim 13
Dependent Claim
32 words
The heat-resistant resin composition according to claim 1, wherein the epoxy resin is bisphenol A type epoxy resin, epoxy novolak type epoxy resin, cyclic epoxy resin or tetraglycidyl ether type epoxy resin.
Claim 14
Dependent Claim
55 words
The heat-resistant resin composition according to claim 1, wherein the component A has a proportion ranging between about 10 and about 85% by weight; the component B has a proportion ranging between about 5 and about 70% by weight; and the component C has a proportion ranging between about 5 and about 80% by weight.
Claim 15
Dependent Claim
36 words
The heat-resistant resin composition according to claim 12, wherein 60% by weight at maximum of the component A is substituted by at least one member selected from the group consisting of N,N'-substituted bismaleimides and N-substituted monomaleimides.
Claim 16
Dependent Claim
55 words
The heat-resistant resin composition according to claim 1, wherein the component A has a proportion ranging between about 30 and about 60% by weight; the component B has a proportion ranging between about 10 and about 40% by weight; and the component C has a proportion ranging between about 10 and about 40% by weight.
Claim 17
Dependent Claim
25 words
The heat-resistant resin composition according to claim 12, which contains at least one member selected from the group consisting of hardening agents and hardening promoters.
Claim 18
Dependent Claim
19 words
The heat-resistant resin composition according to claim 2, which is diluted with inert organic solvent of low boiling point.
References Cited (Backward Citations)
US2511913A
Cited
US3026285A
Cited
US3310602A
Cited
US3336250A
Cited
US3336257A
Cited
US3784515A
Cited
JPS4816061B1
Cited
US3697462A
Cited
US3840495A
Cited
US3839493A
Cited
JPS4955926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |