EP0351027A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Carboxylated rubber particles as tougheners for 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 Preformed carboxylated rubber particles are effective for toughening fiber reinforced composite structures based on thermoset resins such as epoxy resin formulations. The composites are effectively toughened by adding the carboxylated rubber particles to the matrix resin prior to curing the composite.
Inventors
- 👤 Hugh C. Gardner
- 👤 Richard H. Newman-Evans
- 👤 Shahid P. Qureshi
- 👤 Peter W. Manders
- 👤 Daniel H. Hecht
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 14:38
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08L; C08L13/00; C08L63/00; C08J2313/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
49 words
Cross-linked carboxylated rubber particles adapted for use in toughening fiber-reinforced composite structures, characterized by having a smallest dimension in the range of from 1 to 75 microns and being formed of a carboxylated rubber selected from the group consisting of carboxylated diene rubbers, carboxylated acrylic rubbers, and mixtures thereof.
Claim 2
Dependent Claim
49 words
Cross-linked carboxylated rubber particles adapted for use in toughening fiber-reinforced composite structures, characterized by having a smallest dimension in the range of from 1 to 75 microns and being formed of a carboxylated rubber selected from the group consisting of carboxylated diene rubbers, carboxylated acrylic rubbers, and mixtures thereof.
Claim 3
Dependent Claim
20 words
The rubber particles of claim 1, characterized in that said carboxylated rubber comprises from 0.1 to 5 wt% carboxyl functionality.
Claim 4
Dependent Claim
32 words
The rubber particles of claim 1, characterized in that said particles are formed of a carboxylated rubber selected from the group consisting of carboxylated styrene-butadiene-acrylonitrile terpolymers, carboxylated acrylic rubbers and mixtures thereof.
Claim 5
Dependent Claim
35 words
The rubber particles of claim 1, characterized by having a Tg above 15°C and being formed of a carboxylated rubber selected from the group consisting of carboxylated styrene-butadiene-acrylonitrile terpolymers, carboxylated acrylic rubbers and mixtures thereof.
Claim 6
Dependent Claim
41 words
A curable matrix resin formulation, characterized by comprising from 99 to 75 wt% of a thermoset resin and from 1 to 25 wt% of cross-linked carboxylated rubber particles having a smallest dimension in the range of from 1 to 75 microns.
Claim 7
Dependent Claim
41 words
A curable matrix resin formulation, characterized by comprising from 99 to 75 wt% of a thermoset resin and from 1 to 25 wt% of cross-linked carboxylated rubber particles having a smallest dimension in the range of from 1 to 75 microns.
Claim 8
Dependent Claim
35 words
The curable matrix resin formulation of claim 5, characterized in that said rubber particles are formed of a carboxylated rubber selected from the group consisting of carboxylated diene rubbers, carboxylated acrylic rubbers, and mixtures thereof.
Claim 9
Dependent Claim
22 words
The curable matrix resin formulation of claim 5, characterized in that said carboxylated rubber comprises from 0.1 to 5 wt% carboxyl functionality.
Claim 10
Dependent Claim
60 words
The curable matrix resin formulation of claim 5 or 6, characterized in that said particles have a smallest dimension in the range of from 1 to 75 microns and a Tg above 15°C and are formed by spray drying a carboxylated rubber selected from the group consisting of carboxylated styrene-butadiene-acrylonitrile terpolymers, carboxylated nitrile rubbers, carboxylated acrylic rubbers and mixtures thereof.
Claim 11
Dependent Claim
19 words
The curable matrix resin formulation of claim 8, characterized in that said carboxylated rubber is a carboxylated styrene-butadiene-acrylonitrile terpolymer.
Claim 12
Dependent Claim
19 words
The curable matrix resin formulation of claim 8, characterized in that said carboxylated rubber is a carboxylated nitrile rubber.
Claim 13
Dependent Claim
18 words
Articles wholly or partially consisting of a curable resin formulation according to any of claims 1 to 10.
Claim 14
Dependent Claim
15 words
Articles wholly or partially consisting of a cured resin according to claims 1 to 10.
References Cited (Backward Citations)
No citation records indexed.
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