Sizing agent for carbon fibers
 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. 
Toa Nenryo Kogyo Kabushiki Kaisha
C Y D Y Y
C08J Y10T D01F Y10T Y10T
inventional additional inventional additional additional
Makoto Hiroshi Hiroshi Makoto
Saito Inoue Toki Miyazaki