Carrier for use in electrophotography and two component-type dev

Details Carrier for use in electrophotography and two component-type dev Carrier for use in electrophotography and two component-type dev

1994-03-25

1996-10-15

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430108, G03G 910

Patent

active

055652913

ABSTRACT:
A two-component type developer for developing an electrostatic image is constituted by a toner and a carrier. The carrier is composed of a magnetic material and a resin either coating or dispersing the magnetic material. The resin comprises a copolymer having structural units of the following formulae [1] and [2]: ##STR1## wherein A denotes a C.sub.1 -C.sub.10 linear, branched or cyclic alkylidene group, aryl-substituted alkylidene group or arylenedialkylidene group, --O--, --S--, --CO--, --SO-- or --SO.sub.2 --; and R.sub.1 -R.sub.4 independently denote hydrogen, halogen, or a C.sub.1 -C.sub.4 alkyl or alkenyl group: ##STR2## wherein R.sub.5 denotes a C.sub.2 -C.sub.6 alkylene or alkylidene group; R.sub.6 and R.sub.7 denote a C.sub.1 -C.sub.3 alkyl group, a phenyl group or a substituted phenyl group; and n is an integer of 1-200.

REFERENCES:
patent: 2297691 (1942-10-01), Carlson
patent: 3666363 (1972-05-01), Tanaka et al.
patent: 3781378 (1973-12-01), Kentor et al.
patent: 4071361 (1978-01-01), Marushima
patent: 4758491 (1988-07-01), Alexandrovich et al.
patent: 5021317 (1991-06-01), Matsubara
patent: 5213928 (1993-05-01), Yu

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