Nippon Carbide Kogyo Kabushiki Kaisha

Fuji Xerox Co., Ltd.

Hiroshi Serizawa

Yukinobu Hasegawa

Masatoshi Maruyama

Hiroyoshi Shimomura

Manabu Ogawa

Kensuke Okuda

Eiichi Yoshida

Kaoru Kajino

Takashi Terabayashi

Hitoshi Masuda

Hiroshi Masuda

Sonoo Matsuoka

Hiroshi Kamada

Masami Uemae

Yoshihiro Maeyama

Hiroaki Obata

Shinobu Nakagawa

Akira Kume

Shunichi Yakita

Takao Fujii

Takeshi Komatu

Yukinori Nakazato

Noriyuki Tonami

Provided is a toner used for developing an electrostatic image using as a binder resin, a low molecular weight polymer having less odor, which is obtained by emulsion-polymerizing a radical-polymerizable unsaturated monomer at a temperature of 115&deg; C. or higher in the presence or absence of a chain transfer agent.

Toner for developing electrostatic images

A polymer of a low molecular weight having a very little odor is produced by emulsion-polymerizing a radical-polymerizable unsaturated monomer at a temperature of 115&deg; C. or higher in the presence or absence of a chain transfer agent.

Polymer obtained by emulsion polymerization method

A process for producing a binder resin for toners for developing electrostatic images, characterized by involving the step of stirring and thereby mixing a resin solution and an emulsified resin dispersion, and simultaneously or thereafter removing water and the solvent to give a solvent-free resin mixture composition.

Process for producing binder resin for toners for developing electrostatic images

A process for producing a binder resin for a toner comprising the steps of (1) mixing a substantially solventless resin (A) and an emulsion of a resin (B) different from resin (A) with stirring and (2) evaporating water from the mixture of resin (A) and the emulsion of resin (B) simultaneously with or after the step (1) to obtain a substantially solventless resin composition.

Process for producing binder resin for toner

A non-aqueous dispersion type coating resin composition which is excellent in pigment dispersibility and adhesive properties to various base material surfaces, can be made to have a high solid content, can be applied thick, and can form coat having good physical properties such as water resistance, alkali resistance and weatherability, and comprises

Coating resin of aliphatic HC solvent, carboxy-functional acrylic

Powder coating composition

A colored toner for developing electrostatic images which has a degree of gelation of 2.0% or less and comprises an association of secondary particles containing polymer particles having acidic polar groups or basic polar groups and an organic pigment and/or an organic dye treated with a treatment agent containing a surface treatment agent which has the same ionic character as the polymer particles so that the absolute value of .zeta.-potential becomes 10 to 100 mV at pH 5, and a developer for electrostatic images which comprises this colored toner and a carrier.

Colored toner for developing electrostatic images

This invention discloses an aqueous resin dispersion excellent in adhesion to a base material and stability, and capable of forming a coat which exhibits excellent vibration-damping properties over a wide temperature range, and moreover, is flexible and excellent in resistance to chipping and low temperature resistance to impact, and it is an aqueous resin dispersion comprising polymer fine particles dispersed in an aqueous medium, and contains, as the polymer fine particles, composite fine particles (A) comprising a core part and a shell part having specific glass transition temperatures (Tg), respectively, specific composite fine particles (B) wherein the Tg of its core part is different from that of the composite fine particles (A), and/or polymer fine particles (C) having a specific Tg.

Aqueous resin dispersion

A toner for developing an electrostatic image comprises primary colored resin particles having a mean particle size of 0.6 to 10 microns which have been agglomerated to form secondary particles having a particle size of 1.2 to 20 microns. The primary colored resin particles are formed from fine elementary particles comprised of one or more polymers and a colorant. Thus, the toner can be economically prepared, is excellent in resolution, does not cause much fogging or scattering, and is excellent in fixability and image density.

Toners for developing electrostatic image

Growing community of inventors

Kazo, Japan

Hiroshi Serizawa