Patent ID: 9475931
Filing Date: 2016-10-25
CPC Classification: C08F,C08L

Claim Text:
1. A vinyl chloride-based block copolymer prepared by block-copolymerizing a water-dispersible halogen-capping polyalkylacrylate as a chain transfer agent with a vinyl chloride-based monomer, wherein the water-dispersible halogen-capping polyalkylacrylate is a water-dispersed emulsion comprising a halogen-capping polyalkylacrylate, water and a dispersing agent, where the halogen-capping polyalkylacrylate, water and the dispersing agent are homogenized at 2,000 to 10,000 rpm to have a nanometer-scale emulsion having a mean particle diameter controlled to 0.1 to 1 μm, wherein a content of the water-dispersible halogen capping polyalkylacrylate is 5 to 40% by weight, based on 100% by weight of the vinyl chloride-based monomer, and wherein the block copolymer is a tri-block copolymer thermoplastic elastomer having a glass transition temperature (Tg) of 70 to 90° C.