Toner for developing latent electrostatic images
AssigneeRicoh Company, Ltd.
InventorsYoichiro Watanabe, Mitsuo Aoki, Tetsuo Isoda, Nobuhiro Nakayama, Fumihiro Sasaki, Karumi Kakigawa
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Abstract
A toner for developing latent electrostatic images is disclosed, which comprises a colorant, and a binder agent comprising (i) polyester resin or epoxy resin, and (ii) styrene - methyl acrylate copolymer.
Claims5
A toner for developing latent electrostatic images comprising a colorant, and a binder agent which comprises (i) polyester resin having a weight average molecular weight of 8,000 to 16,000, and a glass transition temperature (Tg) of 50.degree. C. to 65.degree. C., or epoxy resin having a weight average molecular weight of 2,000 to 12,000, and a glass transition temperature (Tg) of 50.degree. C. to 65.degree. C., and (ii) styrene - methyl acrylate copolymer having a weight average molecular weight of 200,000 to 500,000, a gel content of 15 to 50%, and a glass transition temperature (Tg) of 55.degree. C. to 70.degree. C.
Dependencies are inferred from the claim text.