Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1992-12-08
1994-12-27
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430137, 430138, G03G 9093
Patent
active
053764900
ABSTRACT:
The present invention is directed to an encapsulated toner for heat-and-pressure fixing, which has a heat-fusible core material containing at least a coloring agent and a shell formed thereon so as to cover the surface of the core material. The core material includes a thermoplastic resin as its main components produced by a polymerization reaction, at the time of encapsulation, of 0.05 to 20 parts by weight of the (A) .alpha.,.beta.-ethylenic copolymerizable monomer having an acid anhydride group and 99.95 to 80 parts by weight of the (B) other .alpha.,.beta.-ethylenic copolymerizable monomer. Alternatively, the core material contains a copolymer having one or more acid anhydride groups added as one component of the core material resin-constituting material at the time of encapsulation.
REFERENCES:
patent: 5229243 (1993-07-01), Sasaki et al.
Kawabe Kuniyasu
Sasaki Mitsuhiro
Ashton Rosemary
Kao Corporation
McCamish Marion E.
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