Canon Kabushiki Kaisha

Emi Tosaka

Yushi Mikuriya

Yasushi Katsuta

Shinya Yachi

Yasuhiro Hashimoto

Keiji Komoto

Satoshi Handa

Takeshi Kaburagi

Manabu Ohno

Koji Abe

Kazumi Yoshizaki

Yuji Moriki

Hitoshi Itabashi

Kenichi Nakayama

Motoya Fukushima

Norikazu Fujimoto

Masanori Ito

Nobuhisa Abe

A toner including toner particles containing at least a binder resin and a colorant. The binder resin is a vinyl-based resin. The toner contains a THF insoluble matter in a quantity of 0.0 mass % or more to less than 16.0 mass %. The toner has a main peak in a molecular weight domain Drranging from 5,000 to 80,000 in measurement of THF soluble matter of the toner with a gel permeation chromatogram (GPC)-differential refractive index detector (RI), and the toner has a main peak in a molecular weight domain Dmranging from 10,000 to 120,000 and at least one peak in a molecular weight domain Dmranging from 300,000 to 7,000,000 in the GPC-RI measurement in measurement with a GPC-multi-angle laser light scattering detector (MALLS).

Toner

A non magnetic toner comprises toner particles each containing at least a binder resin, a colorant and a wax component. The toner further comprises an inorganic fine powder. A storage elastic modulus at 110&#xb0; C. (G') of the non magnetic toner is in a range of 2.00&#xd7;10to 2.00&#xd7;10dN/m. A storage elastic modulus at 150&#xb0; C. (G&#x2032;) of the non magnetic toner is in a range of 3.00&#xd7;10to 2.00&#xd7;10dN/m. The toner particles are obtained by dispersing a polymerizable monomer composition containing polymerizable monomers, the colorant, the wax component and a low-molecular weight polymer into an aqueous medium, granulating the dispersed polymerizable monomer composition, and polymerizing the polymerizable monomers in granulated particles. The low-molecular weight polymer has a weight average molecular weight (Mw) measured by means of gel permeation chromatography (GPC) in a range of 2000 to 5000.

Non-magnetic toner

In a chart of molecular weight distribution measured of a toner, i) the toner has a main peak in the region of molecular weight of 16,000 to 60,000, and ii) where the molecular weight at the main peak is represented by M1, and where the height at the molecular weight M1 is represented by H(M1), the height at a molecular weight of 4,000 by H(4000) and the height at a molecular weight of 15,000 by H(15000), the H(4000), the H(15000) and the H(M1) satisfy a specific proportion. The toner has a weight-average molecular weight (Mw) of 15,000 to 80,000, and, in an endothermic chart, i) the toner has an endothermic main peak in the range of 40 to 130&#xb0; C., and ii) the calorimetric integral value represented by the peak area of the endothermic main peak is 10 to 35 J per 1 g of the toner.

Toner, and toner production process

In a toner having toner particles which comprise toner base particles containing at least a colorant, a release agent and a polar resin, and an inorganic fine powder, the polar resin is a resin having at least a polyester unit, synthesized in the presence of an aromatic carboxylic acid titanium compound used as a catalyst, and has an acid value of from 3 mgKOH/g to 35 mgKOH/g. The toner base particles are obtained by carrying out granulation in an aqueous medium, and the toner has a weight-average particle diameter of from 4.0 &#x3bc;m to 10.0 &#x3bc;m.

A toner is provided which is excellent in low-temperature fixability and offset resistance, has a wide fixing temperature range, provides fixed images with high gloss, and can form toner images having high quality. The toner is composed of toner particles having toner base particles each containing a binder resin and a colorant. When the viscosities of each of the toner particles measured at 100&#xb0; C. and 110&#xb0; C. by a flow tester heat-up method are represented by &#x3b7;(Pa&#xb7;s) and &#x3b7;(Pa&#xb7;s), respectively, an average variation in viscosity Arepresented by the following equation (1) satisfies the relationship of 0&#x2267;A&#x2267;&#x2212;0.064:=(log(&#x3b7;)&#x2212;log(&#x3b7;)/(110&#x2212;100); and&#x2003;&#x2003;(1)

Toner and method of producing toner

A toner includes toner particles containing at least a binder resin and a colorant, and inorganic fine particles. The shape factor SF-1 of the toner particles is in a specific range. The toner has a storage elastic modulus at 140&#xb0; C., G' (140&#xb0; C.), in a specific range the toner comes to have a viscosity of 1.0&#xd7;10Pa&#xb7;s according to a flow tester heating method at a temperature of from 115&#xb0; C. or more to less than 130&#xb0; C.

Toner, and image forming method

The toner having a significantly improved dispersibility of a colorant in toner particles is provided. The present invention provides a dry toner comprising: (i) a binder resin; (ii) a colorant; (iii) at least one of metallophthalocyanine and a metallophthalocyanine derivative having a central metal selected from the group consisting of Cr, Fe, Co, Ni, Zn, Mn, Mg, and Al; and (iv) a polymer containing 0.5 to 20% by mass of a base unit derived from a specific polymerizable monomer having an amide group.

Dry toner, method for producing dry toner, and method for forming an image

The toner having a significantly improved dispersibility of a colorant in toner particles is provided. The present invention provides a dry toner comprising: (i) a binder resin; (ii) a colorant; (iii) at least one of metallophthalocyanine and a metallophthalocyanine derivative having a central metal selected from the group consisting of Cr, Fe, C o, Ni, Zn, Mn, Mg, and Al; and (iv) a polymer containing 0.5 to 20% by mass of a base unit derived from a specific polymerizable monomer having an amide group.

A toner includes toner particles and an inorganic fine powder mixed with the toner particles. The toner particles contain a binder resin, a coloring agent, a releasing agent, and a sulfur-containing resin. The toner particles contain at least one element selected from the group consisting of magnesium, calcium, barium, zinc, aluminum, and phosphorus and satisfy the relationship:4&#x2266;&#x2266;30wherein T represents the total content of the element in ppm, and S represents the content of sulfur in ppm. The weight-average particle diameter (D) of the toner is in the range of 3 to 10 &#x3bc;m. The average circularity of the toner is within the range of 0.950 to 0.995.

In a non-magnetic toner having non-magnetic toner particles containing at least a binder resin and a colorant, and an inorganic fine powder, the non-magnetic toner particles contain at least one ether compound having a specific structure, and the ether compound is in a content of from 5 ppm to 1,000 ppm.

In a toner having toner particles containing at least a colorant, a release agent and a polar resin, and an inorganic fine powder, the polar resin contains a polyester resin obtained by carrying out polymerization in the presence of a titanium chelate compound as a catalyst, and has an acid value in a specific range. The toner particles are granulated in an aqueous medium and have a weight-average particle diameter in a specific range.

A toner contains at least a binder resin, a colorant, a compound (A) and a compound (B) in which the compound (A) is selected from the specific compound group and the compound (B) is a derivative of any one of the compounds included in the group from which the compound (A) is selected. The total content A of the compound (A) and compound (B) in the toner is from 0.2% to 6% by weight based on the weight of the toner, and where the content of the cross-linking agent component in the binder resin is represented by B % by weight based on the weight of the toner, the following relationship is satisfied: 0.1&#x2266;A/B&#x2266;70.

Toner and image-forming method

A color toner (magenta toner) showing not only color image forming performances such as color reproducibility, gradation characteristic, light-fastness, full-color image forming characteristic and a chargeability but also excellent in matching with various members of an electrophotographic apparatus is produced from a binder resin, a wax component and a specific monoazo pigment composition. The monoazo pigment composition is characterized by a principal monoazo pigment of a specific structure and specified amounts of a &bgr;-naphthol derivative and an aromatic amine, usable as materials for synthesizing the monoazo pigment.

Growing community of inventors

Suntoh-gun, Japan

Emi Tosaka