Sizing agent for carbon fibers
First Claim
1. A composite material comprising carbon fibers embedded in a matrix comprising an unsaturated polyester resin or a vinyl ester resin wherein said carbon fibers are pre-coated with a sizing agent comprising an unsaturated urethane compound consisting of the reaction products of an isocyanate compound with at least one unsaturated alcohol selected from the group consisting of alkene alcohols having at least one unsaturated group and the unsaturated alcohols prepared by the reaction of unsaturated carboxylic acids with at least one alkylene oxide.
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Abstract
A sizing agent for a carbon fiber comprized mainly of an unsaturated urethane compound produced by a reaction of an unsaturated alcohol with an isocyanate which is able to couple the carbon fiber with an unsaturated polyester resin or vinylester resin is disclosed. The preferably unsaturated alcohols are allylalcohols and reaction products of an unsaturated carboxylic acids with an alkyleneoxides.
15 Citations
13 Claims
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1. A composite material comprising carbon fibers embedded in a matrix comprising an unsaturated polyester resin or a vinyl ester resin wherein said carbon fibers are pre-coated with a sizing agent comprising an unsaturated urethane compound consisting of the reaction products of an isocyanate compound with at least one unsaturated alcohol selected from the group consisting of alkene alcohols having at least one unsaturated group and the unsaturated alcohols prepared by the reaction of unsaturated carboxylic acids with at least one alkylene oxide.
- 2. The process for sizing carbon fibers fillers for carbon fiber-based composites comprising said fibers incorporated into a matrix comprising at least one unsaturated polyester resin and/or vinyl ester resin comprising the step of sizing said carbon fiber with a coating composition comprising an unsaturated urethane compound consisting of the reaction product of an isocyanate compound with at least one unsaturated alcohol selected from the group consisting of alkene alcohols having at least one unsaturated group and the unsaturated alcohols prepared by the reaction of unsaturated carboxylic acids with at least one alkylene oxide.
- 8. Carbon fibers for incorporation into polymeric composites comprising carbon fibers coated with a sizing composition comprising an unsaturated urethane compound resulting from the reaction of an isocyanate with an unsaturated alcohol having at least one double bond.
Specification