Hard vinyl chloride resin composition for information signal recording media

摘要

A hard vinyl chloride resin composition for information signal recording media, said composition consisting essentially of (A) 100 parts by weight of a copolymer having a specific viscosity of 0.16 to 0.31 and composed of 75 to 99% by weight of vinyl chloride, 1 to 10% by weight of ethylene and 0 to 15% by weight of another monomer copolymerizable with said monomers, and/or a polymer mixture having a specific viscosity of 0.16 to 0.31 and composed of at least two polymers selected so that the proportions of monomer components are the same as above, and (B) 15 to 30 parts by weight of carbon black having an oil absorption of 300 to 400 ml/100g and a surface area of at least 900 m2/g.