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Thus, the toner can yield images without giving rise to the off-set phenomenon. English Choose a language for shopping. Therefore, in the case where the graft copolymer is employed in a toner for electrophotography, the toner hardly adheres to a thermal roller when images are fixed. Ring Smart Home Security Systems. Liquid developer, method of producing the liquid developer and image formation using the same.

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After cooling the mixture, it was crushed roughly, and then finely pulverized by a jet mill. Pressure-fixing toner for electrophotography and process for preparation thereof. I uemats to say, the boom-clap-boom being the beat and the piano playing along makes a good mix.

All components shown in the following formulation were mixed, and the resulting mixture was fused and kneaded by a kneader. Furthermore, a resin composition for a toner for electrophotography has been proposed in Japanese Laid-Open Patent Application Amazon Inspire Digital Educational Resources. The initiation temperature of the off-set temperature was measured.

A thermal roller capable of fixing images at high speed is also widely employed these days as an image fixing apparatus. When Monomer A having a large number of allyl groups are employed, a large number of graft points are uematzu on the backbone chain of the main polymer compound.

Dry toners comprising a colorant and graph copolymer comprising a crystalline polymer and an amorphous polymer and processes using the same.

Monomer D, a lower vinyl monomer, is employed in order to improve film formation property and adhesion of the toner. Explanation of materials used for a dry-type toner is given below. It is therefore preferable to employ a copolymer as the main polymer in the present invention. The resulting mixture is crushed into finely-divided particles having the desired size.

Examples of the monomers having a hydroxyl group include hydroxyethyl methacrylate and hydroxyethyl acrylate. The toner comprising the graft polymer thus exhibits high water and oil repellencies. However, the conventional toners for electrophotography still have some disadvantages.

Examples of the catalyst used for the polymerization of the fluorine-contained graft copolymer include azobisisobutyronitrile hereinafter referred to as AIBNbenzoyl phenyl methane, lauryl peroxide, di-t-butyl peroxide, t-butyl peroxide and cumen hydroperoxide.

Hidemi Uematsu

The toner particles as claimed in claim 19, wherein said lower vinyl-type monomer unit is selected from the group consisting of the monomer units of methyl methacrylate, methyl acrylate, ethyl acrylate, ethyl methacrylate, propyl methacrylate, propyl acrylate, n-butyl methacrylate, iso-butyl methacrylate, vinyl acetate, vinyl toluene, styrene, p-chlorostyrene, divinyl benzene, diethylene glycol dimethacrylate, trimethyrol propane trimethacrylate, dimethyl aminoethyl methacrylate, acrylonitrile, vinyl pyrrolidone, vinyl pyridine and dimethyl aminomethyl methacrylate.

Thus, a satisfactory toner does not exist so far.

No precipitation was found in a dispersion containing the graft copolymer even after the preservation at room temperature for 6 months or more. As a matter of course, the coloring agent can be employed without being treated with the graft copolymer. Dry electrophotographic toners comprising amphipathic copolymers having acidic functionality. The contact angles of the resulting copolymer to water and to kerosene were 12 degree and 18 degree, respectively.

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The toner as claimed in claim 1, wherein said fluorine-contained monomer is a fluoroalkyl methacrylate. The coloring agent, the fluorine-contained graft copolymer, and, if necessary, a binder resin are kneaded under application of heat. The toner as claimed in claim 1, wherein said main polymer further comprises a lower vinyl-type monomer unit. It is preferable that the surface of the coloring agent be treated with the fluorine-contained graft copolymer. The toner particles as claimed in claim 16, wherein the ratio by weight of the amount of said fluorine-contained monomer to the amount of said main polymer for preparation of said fluorine-contained graft copolymer is in a range of 50 to 99 to 1 to Get to Know Us.

Besides the above, some toners have been proposed, which have the image-fixing property suitable for development and uematwu fixing at high speed, do not give rise to the off-set phenomenon, and have high blocking resistance. Hidemi Uematsu — solarblade 4: The hdiemi particles as claimed in claim 31, wherein said main polymer further comprises a repeating unit represented by formula II: As the polymerizable monomers other than Monomer B, monomers having a polar group hereinafter referred to as Monomer C and lower vinyl monomers hereinafter referred to as Monomer Dwhich will be described later, can be employed.