Conductive molding composition

Details Conductive molding composition Conductive molding composition

1979-01-15

1980-10-14

Griffin, Ronald W.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 23EP, 260 4249, 26099816, 274 41A, 3581285, 358129, C08L 9100, H04N 576, H04N 582

Patent

active

042280508

ABSTRACT:
An improved molding composition having a bulk resistivity below about 500 ohm-cm at 900 megahertz for compression molding video discs comprising sufficient conductive carbon black particles to obtain the desired conductivity, from about 1.5 to 4 percent by weight of stabilizers, from about 1 to 3 percent by weight of at least two lubricants, up to 10 percent by weight of plasticizers and processing aids, the remainder being a polyvinylchloride based resin, with the proviso that not more than about 5 percent by weight of liquid additives are present in said molding composition. Video discs molded from said composition have improved dimensional stability.

REFERENCES:
patent: 3770667 (1973-11-01), Tucker
patent: 3833408 (1974-09-01), Matthies
patent: 3842194 (1974-10-01), Clemens
patent: 3960790 (1976-06-01), Khanna
patent: 3975321 (1976-08-01), Heiberger
patent: 4129536 (1978-12-01), Martin et al.
patent: 4151132 (1979-04-01), Khanna

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