US4908088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extreme damage tolerant graphite composites and method of making same
Assignee: Cytec Technology Corp
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Filing: 1988-02-29
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Granted: 1990-03-13
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Expires: 2008-02-29
Abstract
Abstract Multilayer prepregs containing an engineering thermoplastic film laminated to a cyanate-functional thermosetting resin-impregnated fiber reinforcement are capable of preparing structural composites with extreme damage tolerance.
Inventors
- 👤 Jack D. Boyd
- 👤 William T. Mead
- 👤 Theodore F. Biermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:58
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/086; C; C08; C08J; C08J5/00; C08J5/24; C08J5/247; C08J5/249; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/10; B32B2262/106; B32B2305/00; B32B2305/07; B32B2305/076; B32B2305/08; B32B2605/00; B32B2605/18; Y; Y10; Y10T; Y10T428/00; Y10T428/30; Y10T428/31504; Y10T428/31721; Y10T442/00; Y10T442/30; Y10T442/3854; Y10T442/3902
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
72 words
A process for the manufacture of a multi-layer heat-curable prepreg comprising: (a) preparing a thermosetting, cyanate-functional resin-impregnated, fiber reinforced unilayer prepreg; (b) laminating to said unilayer prepreg one or more films of an engineering thermoplastic by means of heat and pressure such that said thermoplastic becomes fused to said unilayer prepreg producing an integral multi-layer structure, wherein said thermoplastic film is a 0.5 mil to 0.7 mil film of an engineering thermoplastic.
Claim 2
Dependent Claim
72 words
A process for the manufacture of a multi-layer heat-curable prepreg comprising: (a) preparing a thermosetting, cyanate-functional resin-impregnated, fiber reinforced unilayer prepreg; (b) laminating to said unilayer prepreg one or more films of an engineering thermoplastic by means of heat and pressure such that said thermoplastic becomes fused to said unilayer prepreg producing an integral multi-layer structure, wherein said thermoplastic film is a 0.5 mil to 0.7 mil film of an engineering thermoplastic.
Claim 3
Dependent Claim
52 words
The process of claim 1 wherein said cyanate functional resin comprises from 50 to about 90 parts by weight of one or more cyanate-functional monomers, and from about 50 to 5 parts by weight of an additional resin selected from the group consisting of bis-maleimides, polymaleimides, polyimides, epoxy resins and mixtures thereof.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said fiber reinforcement is carbon/graphite fiber.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein said unilayer prepreg contains from 20 to 50 percent by weight cyanate functional resin.
Claim 6
Dependent Claim
56 words
A multi-layer heat-curable prepreg comprising: (a) a layer of fiber reinforcement impregnated with a thermosetting resin containing a cyanate-functional resin, and (b) a 0.05 to 0.7 mil layer of an engineering thermoplastic film, wherein said thermoplastic layer and said fiber reinforcement layer are fused together under heat and pressure to form an integral heat-curable multilayer structure.
Claim 7
Dependent Claim
56 words
A multi-layer heat-curable prepreg comprising: (a) a layer of fiber reinforcement impregnated with a thermosetting resin containing a cyanate-functional resin, and (b) a 0.05 to 0.7 mil layer of an engineering thermoplastic film, wherein said thermoplastic layer and said fiber reinforcement layer are fused together under heat and pressure to form an integral heat-curable multilayer structure.
Claim 8
Dependent Claim
41 words
The prepreg of claim 5 wherein said thermoplastic film contains from 1.0 to about 35 percent by weight of a thermosetting matrix resin selected from the group consisting of the bismaleimides, polymaleimides, polyaminobismaleimides, epoxies, and cyanate functional resins, and mixtures thereof.
Claim 9
Dependent Claim
53 words
The prepreg of claim 5 wherein said cyanate-functional resin comprises from 50 to about 90 parts by weight of one or more cyanate-functional monomers, and from about 50 to 5 parts by weight of at least one additional resin selected from the group consisting of bis-maleimides, polymaleimides, polyimides, epoxy resins and mixtures thereof.
Claim 10
Dependent Claim
41 words
The prepreg of claim 5 wherein said thermoplastic film contains from 1.0 to about 35 percent by weight of a thermosetting matrix resin selected from the group consisting of the bismaleimides, polymaleimides, polyaminobismaleimides, epoxies, and cyanate functional resins, and mixtures thereof.
Claim 11
Dependent Claim
26 words
The prepreg of claim 5 wherein said thermoplastic has a thickness of approximately 0.5 mil and is selected from the group consisting of polyimides and polyetherimides.
Claim 12
Dependent Claim
41 words
The prepreg of claim 9 wherein said thermoplastic film contains from 1.0 to about 35 percent by weight of a thermosetting matrix resin selected from the group consisting of the bismaleimides, polymaleimides, polyaminobismaleimides, epoxies, and cyanate functional resins, and mixtures thereof.
Claim 13
Dependent Claim
12 words
The prepreg of claim 5 wherein said fiber reinforcement is carbon/graphite fiber.
Claim 14
Dependent Claim
41 words
The prepreg of claim 11 wherein said thermoplastic film contains from 1.0 to about 35 percent by weight of a thermosetting matrix resin selected from the group consisting of the bismaleimides, polymaleimides, polyaminobismaleimides, epoxies, and cyanate functional resins, and mixtures thereof.
Claim 15
Dependent Claim
26 words
The prepreg of claim 7 wherein said thermoplastic has a thickness of approximately 0.5 mil and is selected from the group consisting of polyimides and polyetherimides.
Claim 16
Dependent Claim
41 words
The prepreg of claim 13 wherein said thermoplastic film contains from 1.0 to about 35 percent by weight of a thermosetting matrix resin selected from the group consisting of the bismaleimides, polymaleimides, polyaminobismaleimides, epoxies, and cyanate functional resins, and mixtures thereof.
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