EP0351028A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Resin particle-filled, fiber-reinforced composites
Assignee: BP Corp North America Inc
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Filing: 1989-07-14
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Granted: —
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Expires: 2009-07-14
Abstract
Abstract Layered, fiber-reinforced composites comprising a cycloaliphatic epoxy resin matrix and continuous fiber are toughened by including a resinous particulate modifier in said matrix resin within the inter-ply spacing of the layered composite. The method of the invention is particularly effective in providing composite structures having a marked improvement in toughness over similar composites based on other epoxy resins.
Inventors
- 👤 Daniel H. Hecht
- 👤 Hugh C. Gardner
- 👤 Shahid P. Qureshi
- 👤 Peter W. Manders
- 👤 Richard H. Newman-Evans
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 11:21
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08L; C08L63/00; C08J2363/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
98 words
A continuous fiber-reinforced composition, capable of being cured, comprising from 20 to 80 wt% of a continuous fiber and from 80 to 20 wt% of an epoxy resin formulation, characterized in that the epoxy resin formulation comprises : (i) 100 pbw of a cycloaliphatic epoxy resin having a plurality of epoxy groups, from 6 to 150 pbw of an amine hardener, and from 0 to 30 pbw of a thermoplastic polymer dissolved in said epoxy resin, said epoxy resin formulation being capable of forming a substantially single, continuous, rigid phase upon curing; and (ii) rigid particles dispersed therein.
Claim 2
Dependent Claim
98 words
A continuous fiber-reinforced composition, capable of being cured, comprising from 20 to 80 wt% of a continuous fiber and from 80 to 20 wt% of an epoxy resin formulation, characterized in that the epoxy resin formulation comprises : (i) 100 pbw of a cycloaliphatic epoxy resin having a plurality of epoxy groups, from 6 to 150 pbw of an amine hardener, and from 0 to 30 pbw of a thermoplastic polymer dissolved in said epoxy resin, said epoxy resin formulation being capable of forming a substantially single, continuous, rigid phase upon curing; and (ii) rigid particles dispersed therein.
Claim 3
Dependent Claim
16 words
The composition of claim 1, characterized in that said epoxy resin is a cycloaliphatic epoxy ether.
Claim 4
Dependent Claim
28 words
The continuous fiber-reinforced composition of claim 1 or 2, characterized in that the particles in the epoxy resin formulation are flakes, flock, beads, irregular particles or mixtures thereof.
Claim 5
Dependent Claim
64 words
The composition of claim 3, characterized in that said particles have a Tg greater than 15°C, and are selected from the group consisting of epoxy resins, polyamide resins, polyamide-imide resins, polyaryl ether resins, oxidized polyacrylonitrile, carbonized polyacrylonitrile, diene rubbers, carboxylated diene rubbers, and carboxylated acrylic rubbers, said particles comprising from 1 to 25 wt%, based on combined weight of particles and said resin formulation.
Claim 6
Dependent Claim
16 words
The continuous fiber-reinforced composition of claim 4, characterized in that said particles are oxidized polyacrylonitrile particles.
Claim 7
Dependent Claim
16 words
The continuous fiber-reinforced composition of claim 4, characterized in that said particles are carbonized polyacrylonitrile particles.
Claim 8
Dependent Claim
15 words
The continuous fiber-reinforced composition of claim 4, characterized in that said particles are polyamide-imide particles.
Claim 9
Dependent Claim
16 words
The continuous fiber-reinforced composition of claim 4, characterized in that said particles are polyaryl ether particles.
Claim 10
Dependent Claim
62 words
The continuous fiber-reinforced composition of claim 4, characterized in that said particles are formed of a cross-linked carboxylated rubber selected from the group consisting of carboxylated diene rubbers, carboxylated styrene-butadiene-acrylonitrile terpolymers, and carboxylated acrylic rubbers, said particles having from 0.1 to 5 wt% carboxyl functionality, a Tg above 15°C and a smallest dimension in the range of from 1 to 75 microns.
Claim 11
Dependent Claim
15 words
The composition of claim 9, characterized in that said particles are formed by spray drying.
Claim 12
Dependent Claim
19 words
The continuous fiber-reinforced composition of claim 3 or 4, characterized in that said continuous fiber is continuous carbon fiber.
Claim 13
Dependent Claim
16 words
A cured composite obtained by curing a composition of claim 1, 2, 3, 4 or 11.
Claim 14
Dependent Claim
48 words
Composite consisting of continuous fiber in a cycloaliphatic epoxy resin matrix and forming a plurality of space- or part, discrete layers of plies, characterized in that there is a resonist particulate modifier and that it is in the matrix resin within the inter-ply spacing of the layered composite.
Claim 15
Dependent Claim
48 words
Composite consisting of continuous fiber in a cycloaliphatic epoxy resin matrix and forming a plurality of space- or part, discrete layers of plies, characterized in that there is a resonist particulate modifier and that it is in the matrix resin within the inter-ply spacing of the layered composite.
Claim 16
Dependent Claim
7 words
A cured composite according to claim 13.
Claim 17
Dependent Claim
20 words
Articles wholly or partially consisting of a composition or cured composition according to one of the claims 1 to 14.
References Cited (Backward Citations)
No citation records indexed.
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