Recording disc compositions comprising polymers of monovinyl-substituted hydrocarbons, conductive carbon black and lubricants
Patent 4412941 Issued on November 1, 1983. Estimated Expiration Date: 
October 22, 2001. 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.
October 22, 2001. 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 References 818279 2750349 3135379 3639517 3639521 3849345 Disc record and method of compounding disc record composition Carbon black pigments and rubber compositions containing the same Elastic resistor compositions containing metallic-conductive particles and conductive lubricant particles 4091053 InventorsAssigneeApplicationNo. 06/313928 filed on 10/22/1981US Classes:252/511, Resin, rubber, or derivative thereof containing260/998.16, SOUND RECORD523/174, Phonograph record molding composition or process of preparing524/496Carbon particle having specified dimensionExaminersPrimary: Michl, Paul R.International ClassesC08L 53/00 (20060101)C08L 53/02 (20060101) C08K 3/00 (20060101) C08K 3/04 (20060101) H01B 1/24 (20060101) AbstractElectrically-conductive compositions comprising about 65-85 weight percent of a resin component based on conjugated alkadienes having 4 to 8 carbon atoms and monovinyl-substituted arenes having 8 to 12 carbon atoms, with 10-30 weight percent extra-conductive carbon black, and about 1 to 5 weight percent of at least one lubricant can be molded into video discs without the processing problems encountered with compositions comprising polyvinyl chloride. |
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