Toner for development of electrostatic image containing binder resin and wax
AssigneeKonishiroku Photo Industry Co., Ltd.
InventorsHiroyuki Takagiwa, Jiro Takahashi, Meizo Shirose, Naomi Inaba, Megumi Seki
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Abstract
There is disclosed a toner for development of electrostatic image which comprises a binder resin selected from the group consisting of a polyester resin, a vinyl polymer, a styrene-butadiene copolymer, a styrene polymer, a styrene-containing copolymer and a polymer containing a reactive prepolymer; and a wax comprising a polyolefin. The toner of the present invention has excellent non-offset properties and a very low minimum fixing temperature, has high fluidity and has excellent developing and transfer properties.
Claims35
A toner particle for development of electrostatic images, characterized by including
- (1) a binder resin selected from the group consisting of
- a polyester resin containing 5% by weight or more of its chloroform-insoluble content;
- a polymer of a vinyl monomer containing 0.005% by weight or more of a cross-linking agent monomer with respect to the total monomers;
- a styrene-butadiene copolymer containing 10% by weight or more of a high molecular weight component having a molecular weight of 100,000 or more;
- a polymer of a styrene monomer or a copolymer of the styrene monomer and another vinyl monomer, a ratio of its weight average molecular weight Mw with respect to its number average molecular weight Mn being 3.5 or more;
- and
- a polymer formed by polymerization of a polymerizable monomer in the presence of a reactive prepolymer;
- (2) a wax comprising a polyolefin which has been block copolymerized or graft copolymerized with an aromatic vinyl monomer wherein the content of said wax is within the range of 1 to 20% by weight;
- and (3) a colorant.
Dependencies are inferred from the claim text.