Electroconductive resin composition and a videodisc record
Patent 4465615 Issued on August 14, 1984. Estimated Expiration Date: 
April 26, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 26, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesVideo discs and molding compositions therefor Information signal record medium of the capacitance type Conductive molding composition Patent #: 4378310 InventorsAssigneeApplicationNo. 06/488763 filed on 04/26/1983US Classes:252/511, Resin, rubber, or derivative thereof containing523/174, Phonograph record molding composition or process of preparing524/504, Solid graft or solid graft-type copolymer with other solid polymer, SICP, or SPFI525/317Ethylenic reactant is vinyl(idene) chlorideExaminersPrimary: Barr, JosephineAttorney, Agent or FirmInternational ClassesC08K 3/00 (20060101)C08K 3/04 (20060101) G11B 9/00 (20060101) H01B 1/24 (20060101) G11B 9/06 (20060101) Foreign Application Priority Data1981-04-22 JPAbstractAn electroconductive resin composition is a blend of 5-30% by weight 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 ethylenevinyl acetate copolymer, the ethylenevinyl 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 video disc records.Field of SearchResin, rubber, or derivative thereof containing | |
