Toner for developing electrostatic image and method of manufactu

Details Toner for developing electrostatic image and method of manufactu Toner for developing electrostatic image and method of manufactu

1995-12-19

1998-12-29

Warzel, Mark L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5262192, 5262196, 5262321, 5262323, 524275, 524277, 525273, 525260, 525263, 525264, 525265, C08F 438

Patent

active

058543651

ABSTRACT:
The present invention relates a toner for developing electrostatic images, comprising: a resin composition, which contains a binder resin and low molecular weight wax, and a coloring agent, wherein the binder resin does not substantially contain insoluble tetrahydrofuran (THF) component, its chromatograph measured with soluble tetrahydrofuran (THF) component has a main peak in a region of a molecular weight of 2,000 to 30,000 and a subpeak or a shoulder in a high molecular weight region of a molecular weight of 100,000 or more, a ratio of weight average molecular weight (Mw)
umber average molecular weight (Mn) thereof is 30 or more, the high molecular weight region has a crosslinking monomer unit as a component monomer unit and the binder resin contains high molecular weight polymer having a Mw of 1,200,000 or more polymerized by using both polyfunctional initiator and a mono-functional initiator. Moreover, the present invention relates to a method of manufacturing a resin composition for producing a toner.

REFERENCES:
patent: 2297691 (1942-10-01), Carlson
patent: 4499168 (1985-02-01), Mitsuhashi
patent: 4939060 (1990-07-01), Tomiyama et al.
patent: 5051331 (1991-09-01), Sakashita
patent: 5130219 (1992-07-01), Mori et al.
patent: 5149941 (1992-09-01), Hirabayashi et al.
patent: 5268248 (1993-12-01), Tanikawa et al.

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