Photocopying – Contact printing – Light boxes
Patent
1994-09-13
1995-06-06
Rosasco, S.
Photocopying
Contact printing
Light boxes
358296, 4301066, 430109, 430904, G03G 9083, G03G 1506, G01D 1506, H04N 121
Patent
active
054227070
ABSTRACT:
A toner for developing an electrostatic image, comprises a binder resin and a colorant. The toner has a glass transition temperature (Tg) of 65.degree. C. or lower. The binder resin comprises a styrene-acrylic copolymer formed from at least a styrenic monomer and a mixture of two or more acrylic monomers. The binder resin contains 10% by weight or more of THF insolubles. The amount of the styrenic monomer remaining in the toner is 0.005 part or less by weight based on 100 parts by weight of the binder resin component in the toner (50 ppm), and the amount of the acrylic monomers remaining in said toner is 0.001 part by weight based on 100 parts by weight or less of the binder resin component in the toner (10 ppm). At least one component of the mixture of acrylic monomers has a Q-value of 0.5 to less than 1.0 and the other has a Q-value of 0.3 to less than 0.5.
This toner is excellent in the anti-off-set property to a fixing roller surface, good in fixability, giving high image density and little odor.
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patent: 4971879 (1990-11-01), Kimura et al.
Kukimoto Tsutomu
Kuwashima Tetsuhito
Takiguchi Tsuyoshi
Tomiyama Koichi
Yusa Hiroshi
Canon Kabushiki Kaisha
Rosasco S.
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