GRAFT COPOLYMER FOR TRANSPARENT THERMOPLASTIC POLYURETHANE RESIN, PREPARATION METHOD THEREOF, AND POLYURETHANE RESIN COMPOSITION CONTAINING THE SAME

摘要

The present invention relates to a graft copolymer for transparent thermoplastic polyurethane resin, a preparing method thereof and a polyurethane resin composition comprising the same, more precisely a graft copolymer for transparent thermoplastic polyurethane resin prepared by graft copolymerization of (a) 50 - 85 weight% of rubber latex having multi-layered structure composed of an inner layer and an outer layer comprising a conjugated diene monomer and an ethylenically unsaturated aromatic compound in which the refraction index of the inner layer is greater than that of the outer layer; and (b) 15 - 50 weight% of a C<SUB>2</SUB> - C<SUB>20</SUB> vinyl monomer. The present invention provides a thermoplastic polyurethane resin composition having excellent color properties, calendaring properties, low temperature impact strength and transparency.