Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1983-07-15
1985-03-26
Welsh, John D.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430904, 527604, G03G 908
Patent
active
045073767
ABSTRACT:
An electrophotographic toner composition having excellent blocking resistance and offset resistance which contains as a resin binder a polymeric rosin compound having a softening point of 50.degree. to 190.degree. C., a glass transition temperature of 10.degree. to 170.degree. C. and a molecular weight of 2,000 to 40,000 prepared by the reaction of (a) a glycidyl ester of rosin, (b) a dicarboxylic acid or its anhydride, and (c) a crosslinking agent selected from the group consisting of a polyfunctional epoxy compound, a polycarboxylic acid having a valency of not less than 3 or its anhydride, and a polyhydric alcohol having a valency of not less than 3. A dihydric alcohol may be used in the above reaction in order to improve the low temperature fixing property of the toner.
REFERENCES:
patent: 2297691 (1942-10-01), Carlson
Makita Muneharu
Munemitsu Toshiaki
Oseto Osamu
Arakawa Kagaku Kogyo Kabushiki Kaisha
Welsh John D.
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