Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1992-05-26
1994-08-09
Lovering, Richard D.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
264 432, 264 433, 42840221, 42840222, 42840224, 430109, 430137, 430138, 523201, B01J 1316, B01J 1322, G03C 172, G03G 9093
Patent
active
053365810
ABSTRACT:
A microcapsule comprising a capsule shell having at least one polymer structure selected from the group consisting of a polyurea resin, a polyurethane resin, a polyamide resin, a polyester resin and an epoxy resin and containing a block and/or graft copolymer formed by the vinyl polymerization of vinyl monomers initiated by the decomposition of a polymerization-initiating azo group which has been previously incorporated in the polymer structure. A process for the preparation of a microcapsule, which comprises the steps of: (a) allowing a first capsule shell-forming monomer and a second capsule shell-forming monomer, at least one of which contains a polymerization-initiating azo group, to undergo reaction in the inside and/or at the border of an oily drop to form a capsule shell containing a polymerization-initiating azo group and having at least one polymer structure selected from the group consisting of a polyurea resin, a polyurethane resin, a polyamide resin, a polyester resin and an epoxy resin, and then (b) allowing vinyl monomers to be vinyl-polymerized to said capsule shell. A microcapsule toner which comprises the above microcapsule in which the vinyl monomers contain a charge controlling group. A process for the preparation of a microcapsule toner which comprises the above process for the preparation of a microcapsule in which the vinyl monomers contain a charge controlling group.
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Inaba Yoshihiro
Mikami Takeshi
Fuji 'Xerox Co., Ltd.
Lovering Richard D.
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