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AssigneeRicoh Company, Ltd.
InventorsKazuo Tsubuko, Shinichi Kuramoto, Kayoko Nagai, Makoto Okawara, Hajime Takanashi
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This invention relates to a non-aqueous type resin dispersion obtained by polymerizing a polymerizable composition containing at least monomer A represented by the general formula (I), ##STR1## (wherein, R.sup.1 represents --H or --CH.sub.3, X represents --COOC.sub.n H.sub.2n+1 or --OCOC.sub.n H.sub.2n+1, and n represents an integer of 6-20), monomer B represented by the general formula (II), ##STR2## (wherein, R.sup.2 and R.sup.3 represent --H or --CH.sub.3 and m represents an integer of 1-20), and monomer C having a carboxyl group or a glycidyl group in the presence of a polymerization initiator in an aliphatic hydrocarbon solvent.
A liquid developer for electrophotography characterized by containing a colorant and a non-aqueous type resin dispersion obtained by polymerizing a system containing at least monomer A which has the formula (I), ##STR8## wherein R.sup.1 is --H or --CH.sub.3, X is --COOC.sub.n H.sub.2n+1 or --OCOC.sub.n H.sub.2n+1, and n is an integer of 6-20;
A non-aqueous resin dispersion obtained by copolymerizing (1) a monomer A having the formula (I) ##STR16## wherein R.sup.1 is --H or --CH.sub.3, X IS --COOC.sub.n H.sub.n+1 or --OCOC.sub.n H.sub.2n+1, and n is an integer of 6 to 20, (2) a monomer B having the formula (II) ##STR17## wherein R.sup.2 and R.sup.3 are --H or --CH.sub.3, and m is an integer of 1 to 20, and (3) a monomer C which has a carboxyl group or a glycidyl group, in the presence of a polymerization initiator, in an aliphatic hydrocarbon solvent, to obtain a copolymer;
Dependencies are inferred from the claim text.