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Sizing agent for carbon fibers

  • US 4,781,947 A
  • Filed: 08/12/1987
  • Issued: 11/01/1988
  • Est. Priority Date: 08/12/1986
  • Status: Expired due to Fees
First Claim
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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.

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