Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1993-02-11
1994-11-29
Rosasco, Steve
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430110, G03G 900
Patent
active
053689690
ABSTRACT:
The present invention provides a coating agent for an electrophotographic carrier comprising as a major component a copolymer of at least one monomer selected from the organopolysiloxanes represented by the following general formulas 1, 2, and 3 with other polymerizable monomer: ##STR1## wherein the general formulas 1, 2, and 3, R.sup.1 is hydrogen atom or methyl group; R.sup.2 is C.sub.1 -C.sub.10 alkyl or phenyl group; R.sup.3 is R.sup.2 or CH.sub.2 .dbd.C(R.sup.1)COOC.sub.3 H.sub.6 ; n, p, and q are defined as n.gtoreq.3, p.gtoreq.0, q.gtoreq.3, and p<q; and r is an integer of 2-20.
The coating agent for an electrophotographic carrier resists the formation of wear, peeling, cracks, and the like, which can also prevent the spent condition from occurring and thus, permits use over a long period of time; and it provides a long-life electrophotographic carrier in which the carrier charge characteristics exhibit low temperature dependency.
REFERENCES:
patent: 4277595 (1981-07-01), Deichert et al.
patent: 4977054 (1990-12-01), Honjo et al.
Takarada Mitsuhiro
Yoshikawa Yuji
Rosasco Steve
Shin-Etsu Chemical Co. , Ltd.
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