Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1992-08-18
1994-06-28
Rosasco, Steve
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430137, 430904, G03G 900
Patent
active
053246128
ABSTRACT:
A toner for electrophotography which comprises, as a binder resin, a polyester resin obtained from carboxylic acids containing aromatic monomer in a proportion of 80 mol % or more relative to the entire carboxylic acid component, and alcohols containing aliphatic diols having 2 to 4 carbon atoms in a proportion of 70-100 mol % relative to the entire alcohol component and alicyclic alcohols in a proportion of 0-30 mol % relative to the entire alcohol component, and having a specific gravity of 1.3 or more, a glass transition temperature of 58.degree. C. or more, and a number average molecular weight of 1,000-6,000. The toner of the present invention is superior in image characteristics, fixability, storage stability (resistance to blocking), resistance to plasticizer and charge stability. Therefore, even after a long-term storage of a sheet copied using the toner of the present invention, by keeping same in direct contact with a vinyl chloride transparent sheet or an eraser, transfer of coloring materials and attaching of resin onto the vinyl chloride sheet or the eraser do not occur.
REFERENCES:
patent: 4788122 (1988-11-01), Kawabe et al.
patent: 4933252 (1290-06-01), Nishikawa et al.
Arichi Minako
Hotta Yasunari
Ikuzawa Yoshihiro
Maeda Satoshi
Shimomura Tetsuo
Rosasco Steve
Toyo Boseki Kabushiki Kaisha
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