Pressure-fixing magnetic developer containing hydrogenated polys

Details Pressure-fixing magnetic developer containing hydrogenated polys Pressure-fixing magnetic developer containing hydrogenated polys

1977-01-11

1978-07-11

Gwinnell, Harry J.

Compositions

Electrolytes for electrical devices

96 1SD, 159 48R, 252 6253, 252 6254, 252511, 427 18, 427 22, G03G 914

Patent

active

041000870

ABSTRACT:
A pressure fixing developer for electrostatic photography comprising a finely divided magnetic material and a binder as effective components and consisting essentially of substantially spherical particles of said finely divided magnetic material dispersed in a solid medium of said binder, said binder medium being composed of a resin composition comprising (a) 25 to 65% by weight based on the total binder of a hydrogenated styrene resin, (b) 5 to 45% by weight based on the total binder of a wax having a melting point of at least 60.degree. C. and (c) 10 to 30% by weight based on the total binder of a copolymer of anlefin with a carbonyl group-containing, ethylenically unsaturated monomer.

REFERENCES:
patent: 2384619 (1945-09-01), Heller
patent: 2726233 (1955-12-01), Warner et al.
patent: 3925219 (1975-12-01), Strong
patent: 3933665 (1976-01-01), Van Engeland et al.

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