High density information records of an electrostatic capacitance

Details High density information records of an electrostatic capacitance High density information records of an electrostatic capacitance

1984-11-26

1986-12-23

Goodrow, John L.

Dynamic information storage or retrieval

Storage medium structure

Electrical track structure

428457, 428480, 523174, G08K 304, G11B 500

Patent

active

046317171

ABSTRACT:
High density information records formed from conductive resin compositions which comprise a graft polymer obtained by subjecting vinyl chloride monomer to graft polymerization with a copolymer of ethylene and vinyl acetate having a content of vinyl acetate of not less than 35 wt % and a melt index up to 20 and prepared according to a solution polymerization technique. The conductive composition further comprises predetermined amounts of a conductive material and a lubricant of a specific type. The lubricant is an ester between aliphatic acid and alcohol having a hydroxyl value not larger than 15.

REFERENCES:
patent: 4396660 (1983-08-01), Hata et al.
patent: 4464279 (1984-08-01), Arai
patent: 4465615 (1984-08-01), Hata et al.
patent: 4492734 (1985-01-01), Ogawa et al.
patent: 4503120 (1985-03-01), Yamauchi et al.

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