Electroconductive resin composition and a videodisc record
AssigneeTokuyama Sekisui Kogyo Kabushiki Kaisha
InventorsAkio Hata, Hiroshi Kake, Noriki Fujii
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Abstract
An electroconductive resin composition is a blend of 5-30% by weight of carbon black and a graft-polymer. The graft-polymer is obtained by graft-polymerizing 99-76 parts by weight of monomeric vinyl chloride to 1-15 parts by weight of an ethylene-vinyl acetate copolymer, the ethylene-vinyl acetate copolymer containing 10-65% by weight of vinyl acetate. The electroconductive resin composition has superior heat resistance and mechanical strength and improved flowability and heat stability. The electroconductive resin composition is particularly suitable for preparing videodisc records.
Claims1
A videodisc record prepared by forming into a thin disc an electroconductive resin composition comprising a blend of 5 to 30% by weight of carbon black with a graftpolymer obtained by graft-polymerizing 99 to 76 parts by weight of monomeric vinyl chloride to 1 to 15 parts by weight of ethylene-vinyl acetate copolymer, said copolymer containing therein 10 to 65% by weight of vinyl acetate.
Dependencies are inferred from the claim text.