Patent ID: 8980427
Filing Date: 2015-03-17
Classification: C08G,C08J,D06M,Y10T

Abstract:
1. A carbon fiber bundle having carbon fibers and a sizing agent, wherein said sizing agent comprises a polyurethane resin composed of the component shown in (A) and the component shown in (B1) or (B2) below, and the sizing agent is deposited on said carbon fibers at a rate of 0.5 to 7% by mass: (A) 73 to 98% by mass of a polyoxyalkylene unit; (B1) 0.5 to 15% by mass of an aromatic ester unit, 1.5 to 10% by mass of an aromatic urethane unit; and (B2) 0.5 to 10% by mass of an aromatic ester unit, 1.5 to 11% by mass of an aliphatic urethane unit.