Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1997-12-04
2000-10-24
Chapman, Mark
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430137, G03G 9093
Patent
active
061364908
ABSTRACT:
A monomer for a shell or a mixture of at least two monomers for a shell was suspension polymerized in the presence of core particles and a polymerization initiator to obtain polymer particles, wherein said core particles are formed of a polymer obtained by polymerization of a monomer for a core or a mixture of at least two monomers for a core and containing a colorant, wherein said monomer for a shell or mixture of monomers for a shell is one which gives upon polymerization a polymer having a glass transition temperature higher than that of the polymer forming the core particle, and wherein said polymerization initiator is represented by the following formula 1: ##STR1## wherein X.sup.1, X.sup.2, X.sup.3 and X.sup.4 independently represent oxygen atom, sulfur atom, >NR (wherein R is hydrogen atom, alkyl group, or group); R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently represent alkyl group, aryl group, or alkyl or aryl group having at least one substituent which is --OR, --OH, --NHR, or --NR.sub.2 (wherein R is alkyl group or aryl group), and n and m independently represent an integer of 1 to 10. An outer additive was applied on the polymer particle to obtain a polymerized toner. This polymerized toner has low fixing temperature, excellent overhead projector transparency, good shelf stability, and exhibiting a less pronounced reduction in electric charge under conditions of high humidity and high temperature.
REFERENCES:
patent: 4077804 (1978-03-01), Vanzo
patent: 4804610 (1989-02-01), Mori et al.
patent: 5213934 (1993-05-01), Sacripante et al.
patent: 5336581 (1994-08-01), Inaba et al.
patent: 5958640 (1999-09-01), Hasegawa et al.
English Translation of JP9-258,472, Ishiyama et al., Oct. 3, 1997.
Derwent WPI Acc No. 82-32311/198216; Abstract of JP 57-045558A published Mar. 15, 1982.
Derwent WPI Acc No. 86-186166/198629; Abstract of JP 61-118758A published Jun. 6, 1986.
Derwent WPI Acc No. 91-212627/199129; Abstract of JP 3-136065A published Jun. 10, 1991.
Derwent WPI Acc No. 92-256911/199231; Abstract of JP 59-061843A published Jul. 8, 1882.
Hasegawa Jun
Ogawa Tokudai
Sakai Jun
Chapman Mark
Nippon Zeon Co. Ltd.
LandOfFree
Polymerized toner does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polymerized toner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymerized toner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1961818