Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1994-05-20
1996-01-09
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
G03G 9097
Patent
active
054828074
ABSTRACT:
A positively-chargeable toner includes a binder resin, a coloring agent, and a quaternary-ammonium-base containing copolymer with a weight-average molecular weight of 5,000 to 25,000, which included a repeat unit of formula (I), and a repeat unit of formula (II): ##STR1## wherein R.sup.1 is a hydrogen atom or a methyl group; R.sup.2 is a hydrogen atom or a methyl group; R.sup.3 is an alkylene group, and R.sup.4, R.sup.5 and R.sup.6 are an alkyl group. The quaternary-ammonium-base containing copolymer may further include a repeat unit of formula (III): ##STR2## wherein R.sup.7 is a hydrogen atom or a methyl group; and R.sup.8 is an alkyl group.
REFERENCES:
patent: 3977983 (1976-08-01), Tsuneda
patent: 4229513 (1980-10-01), Merrill et al.
patent: 4299898 (1981-11-01), Williams et al.
patent: 4621039 (1986-11-01), Ciccarelli et al.
patent: 4840867 (1989-06-01), Otsu et al.
Aoki Mitsuo
Hagiwara Tomoe
Kato Takahisa
Suzuki Masanori
Martin Roland
Ricoh & Company, Ltd.
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