Canon Kabushiki Kaisha

Tadashi Dojyo

Yushi Mikuriya

Makoto Unno

Takaaki Kotaki

Yasutaka Akashi

Masaaki Taya

Masaki Uchiyama

A magnetic toner composed of a binder resin and magnetic fine particles, wherein the magnetic fine particles are coated with an iron-zinc oxide on their surfaces and the magnetic fine particles have a saturation magnetization (.sigma.s) of 50 Am.sup.2 /kg or above under a magnetic field of 79.58 kA/m (1K oersted) where the product of residual magnetization (.sigma.r, Am.sup.2 /kg) and coercive force (Hc, kA/m), .sigma.r.times.Hc, is in the range between 60 and 250 (kA.sup.2 m/kg).

Magnetic toner and image forming method

A toner for developing electrostatic images comprises, (i) a binder resin, (ii) a colorant, and (iii) a compound made by a reaction of a monohydroxylic compound having a long-chain alkyl group having an alkylene group with 40 or more carbon atoms and a hydroxyl group with a carboxylic acid having a molecular weight of 1,000 or less, or a compound made by a reaction of a monocarboxylic compound having a long-chain alkyl group having an alkylene group with 40 or more carbon atoms and a carboxyl group with an alcohol having a molecular weight of 1,000 or less.

Toner for developing electrostatic images, image forming method and

A toner for developing an electrostatic image has a binder resin and a colorant. The binder resin contains a polyester resin at least part of which has a long-chain alkyl group having 22 to carbon atoms and has a hydroxyl group or a carboxyl group at its terminal.

Growing community of inventors

Kawasaki, Japan

Tadashi Dojyo