Patent US4786880A successfully refreshed from Google Patents.
Patent US4752641A successfully refreshed from Google Patents.
US4752641A
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Thermosetting resin composition and prepolymer obtained therefrom
Assignee: Hitachi Ltd
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Filing: 1987-04-24
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Granted: 1988-06-21
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Expires: 2007-04-24
Abstract
Abstract A thermosetting resin composition comprising (a) a polyfunctional maleimide, (b) at least one member selected from the group consisting of alkenylphenols and alkenylphenol ethers, and (c) an allyl ester of polyvalent carboxylic acid, or cyanuric or isocyanuric acid and a prepolymer obtained by preliminarily heating the thermosetting resin composition can be used as a solventless type varnish for impregnating, e.g. electric windings, or for preparing a prepreg, and can give a cured product with heating at 120 DEG -250 DEG C. having excellent heat resistance of class C (180 DEG C. or higher) and electrical insulating properties.
Inventors
- 👤 Toru Koyama
- 👤 Hiroko Ohayashi
- 👤 Junichi Katagiri
- 👤 Motoyo Wajima
- 👤 Junji Mukai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:20
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/36; C08F22/40; C08F222/00; C08F222/36; C08F222/40; C08F222/404
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
84 words
A thermosetting resin composition comprising the following components: (a) an equivalent weight of a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of at least one member selected from the group consisting of an alkenylphenol and an alkenylphenol ether, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl esters of polyvalent carboxylic acid or cyanuric or acid or isocyanuric acid per 100 parts by weight of the total of components (a) and (b).
Claim 2
Dependent Claim
84 words
A thermosetting resin composition comprising the following components: (a) an equivalent weight of a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of at least one member selected from the group consisting of an alkenylphenol and an alkenylphenol ether, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl esters of polyvalent carboxylic acid or cyanuric or acid or isocyanuric acid per 100 parts by weight of the total of components (a) and (b).
Claim 3
Dependent Claim
37 words
A composition according to claim 1, wherein the component (a) is a maleimide having in its molecule at least two groups represented by the formula: ##STR4## wherein D is a divialent group having a carbon-carbon double bond.
Claim 4
Dependent Claim
18 words
A composition according to claim 1, wherein the component (b) is diallyl bisphenol F or diallyl bisphenol A.
Claim 5
Dependent Claim
13 words
A composition according to claim 1, wherein the component (c) is triallyl isocyanurate.
Claim 6
Dependent Claim
38 words
A composition according to claim 1, which further comprises a free radical catalyst or an ionic catalyst in an amount of 0.1 to 5% by weight based on the total weight of the components (a), (b) and (c).
Claim 7
Dependent Claim
96 words
A composition according to claim 1, wherein the component (a) is a maleimide having in its molecule at least two groups represented by the formula: ##STR5## wherein D is a divalent group having a carbon-carbon double bond in an amount of 1 equivalent weight, the component (b) is diallyl bisphenol F or diallyl bisphenol A in an amount of 0.2 to 1.0 equivalent weight, and the component (c) is triallyl isocyanurate in an amount of 20 to 100 parts by weight per 100 parts by weight of the total weight of the components (a) and (b).
Claim 8
Dependent Claim
86 words
A prepolymer obtained by preliminarily heating a thermosetting resin composition comprising the following components: (a) an equivalent weight of a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of at least one member selected from the group consisting of an alkenylphenol and alkenylphenol ether, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl of polyvalent carboxylic acid or cyanuric acid or isocyanuric acid per 100 parts by weight of the total components (a) and (b).
Claim 9
Dependent Claim
86 words
A prepolymer obtained by preliminarily heating a thermosetting resin composition comprising the following components: (a) an equivalent weight of a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of at least one member selected from the group consisting of an alkenylphenol and alkenylphenol ether, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl of polyvalent carboxylic acid or cyanuric acid or isocyanuric acid per 100 parts by weight of the total components (a) and (b).
Claim 10
Dependent Claim
37 words
A prepolymer according to claim 7, wherein the component (a) is a maleimide having in its molecule at least two groups represented by the formula: ##STR6## wherein D is a divalent group having a carbon-carbon double bond.
Claim 11
Dependent Claim
18 words
A prepolymer according to claim 7, wherein the component (b) is diallyl bisphenol F or diallyl bisphenol A.
Claim 12
Dependent Claim
13 words
A prepolymer according to claim 7, wherein the component (c) is triallyl isocyanurate.
Claim 13
Dependent Claim
38 words
A prepolymer according to claim 7, which further comprises a free radical catalyst or an ionic catalyst in an amount of 0.1 to 5% by weight based on the total weight of the components (a), (b) and (c).
Claim 14
Dependent Claim
91 words
A prepolymer according to claim 7, wherein the component (a) is a maleimide having in its molecule at least two groups represented by the formula: ##STR7## wherein D is a divalent group having a carbon-carbon double bond in an amount of 1 equivalent weight, the component (b) is diallyl bisphenol F or diallyl bisphenol A in an amount of 0.2 to 1.0 equivalent weight, and the component (c) is triallyl isocyanurate in an amount of 20 to 100 parts by weight of the total weight of the components (a) and (b).
Claim 15
Dependent Claim
81 words
A prepolymer obtained by heating a thermosetting resin composition comprising: (a) an equivalent weight oif a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of an alkenylphenol, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl esters of polyvalent carboxylic acid, cyanuric acid or isocyanuric acid per 100 parts by weight of the components (a) and (b); said prepolymer having a viscosity of 10 poises or less at 80° C.
Claim 16
Dependent Claim
81 words
A prepolymer obtained by heating a thermosetting resin composition comprising: (a) an equivalent weight oif a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of an alkenylphenol, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl esters of polyvalent carboxylic acid, cyanuric acid or isocyanuric acid per 100 parts by weight of the components (a) and (b); said prepolymer having a viscosity of 10 poises or less at 80° C.
Claim 17
Dependent Claim
100 words
A process for curing a prepolymer which comprises heating the prepolymer at 150° C. or higher, said prepolymer being obtained from a thermosetting resin composition comprising (a) an equivalent weight of a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of an alkenylphenol, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl esters of polyvalent carboxylic acid, cyanuric acid or isocyanuric acid per 100 parts by weight of the total of the components (a) and (b); said prepolymer having a viscosity of 10 poises or less at 80° C.
Claim 18
Dependent Claim
100 words
A process for curing a prepolymer which comprises heating the prepolymer at 150° C. or higher, said prepolymer being obtained from a thermosetting resin composition comprising (a) an equivalent weight of a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of an alkenylphenol, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl esters of polyvalent carboxylic acid, cyanuric acid or isocyanuric acid per 100 parts by weight of the total of the components (a) and (b); said prepolymer having a viscosity of 10 poises or less at 80° C.
Claim 19
Dependent Claim
104 words
A prepreg obtained by containing a prepolymer in an amount of 20 to 60% by weight in a reinforced substrate said prepolymer being obtained from a thermosetting resin composition comprising: (a) an equivalent weight of a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of an alkenylphenol, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl esters of polyvalent carboxylic acid, cyanuric acid or isocyanuric acid per 100 parts by weight of the total of the components (a) and (b); said prepolymer having a viscosity of 10 poises or less at 80° C.
Claim 20
Dependent Claim
104 words
A prepreg obtained by containing a prepolymer in an amount of 20 to 60% by weight in a reinforced substrate said prepolymer being obtained from a thermosetting resin composition comprising: (a) an equivalent weight of a polyfunctional maleimide, (b) 0.2 to 1.0 equivalent weight of an alkenylphenol, and (c) 20 to 100 parts by weight of at least one member selected from the group consisting of allyl esters of polyvalent carboxylic acid, cyanuric acid or isocyanuric acid per 100 parts by weight of the total of the components (a) and (b); said prepolymer having a viscosity of 10 poises or less at 80° C.
References Cited (Backward Citations)
US4463147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |