Konica Minolta Business Technologies, Inc.

Konica Minolta, Inc.

Konica Minolta Business Corporation, Inc.

Hiroaki Obata

Kenji Hayashi

Mikio Kouyama

Koji Shibata

Natsuko Kusaka

Hiroshi Nagasawa

Hiroyuki Yasukawa

Yasuhiko Muramatsu

Noriyuki Kinpara

Tomoko Sakimura

Kishio Tamura

Anju Hori

Natsuko Fujisaki

Noriyuki Kimpara

Ken Ohmura

Yukio Hosoya

Mikio Koyama

Taro Konuma

Mitsunori Gotou

Tatsuya Fujisaki

An object of the present invention is to provide a near-infrared shielding film having low initial haze and resistance to haze increase in weathering tests, to provide a method for producing such a near-infrared shielding film, and to provide a pressure-sensitive adhesive composition. The near-infrared shielding film of the present invention includes a transparent substrate and a component layer that is provided on at least one surface of the substrate and includes, as compounds, resin A shown below, at least one of resin B or C shown below, and oxide fine particles D shown below.

Near-infrared shielding film, method for producing the same, and pressure-sensitive adhesive composition

To provide a fixing solution and an image forming method in which faster fixing rate and faster drying rate can be achieved while the amount of fixing solution supplied is reduced and furthermore, a wet feeling in a formed image is reduced and an image having a high fixing strength can be formed. A fixing solution that softens a toner to fix a toner image constituted by the toner to an image support contains a hydroxyl group-containing ester compound expressed by general formula (1) below:R&#x2014;(CO)&#x2014;O&#x2014;R&#x2003;&#x2003;general formula (1):where Rrepresents a linear or branched alkyl group having 6 to 11 carbon atoms, and Rrepresents a linear or branched alkyl group having at least one hydroxyl group and 2 to 4 carbon atoms.

Fixing solution and image forming method

In the present invention, provided is an electrophotographic toner in which low temperature fixing is achieved, and high storage stability is obtained without generating tacking with respect to fixed images to be formed. It is a feature that this electrophotographic toner possesses at least a binder resin, a colorant and a releasing agent, wherein the releasing agent comprises an ester compound and an aliphatic hydroxycarboxylic acid compound.

Electrophotographic toner

In an image forming method of wet fixing system, the fixing solution contains an ester compound represented by at least one of general formula (1) and general formula (2) below:R&#x2014;(CO)&#x2014;O&#x2014;R&#x2003;&#x2003;General formula (1):

Image forming method

An image forming method that can obtain a high fixing strength and reduce the occurrence of a document offset phenomenon is provided. In the image forming method the polyester resin forming the binder resin of the toner is obtained by condensing and polymerizing a carboxylic component containing at least one compound selected from chemical formula (1), (2) and (3) shown below that is an addition reactant of abietic acid and a carboxylic compound having an unsaturated double bond and an alcohol component, and the content of at least the one compound selected from the chemical formula (1), (2) and (3) in the carboxylic component is 5% by mass or more, and the fixing agent contains an alkylene carbonate which may have a substituent group or an aliphatic alkyl carboxylic acid ester which may have a substituent group. 

Provided is a toner containing toner particles containing a polyester resin which has a structure part represented by Formula (1): 

Electrophotographic toner and production method of the same

In the present invention, provided is a toner suitable for fixing at low temperature, which exhibits excellent performance against thermal stress as well as mechanical stress with no generation of blocking even during storage for a long duration in an unused state, and also with no generation of tacking of toner images after fixing. Also disclosed is a toner comprising at least a binder resin, a colorant and a wax, the toner comprising a fatty acid ester wax comprising a hydroxyl group, and an aliphatic alcohol.

Toner, developer, and method of manufacturing toner

A toner for electrostatic latent image development is disclosed comprising colored particles containing a binder resin and a colorant and external-additive particles attached to the surfaces of the colored particles, wherein the external-additive particles comprise resin particles covered with an inorganic layer, and the resin particles are bound to the inorganic layer by a siloxane bond. A preparation method of the toner is also disclosed.

Toner for electrostatic latent image development and image forming method

Disclosed is a toner manufacturing method, comprising: dispersing a polyester resin prepared by condensing a polyol and a polycarboxylic acid into an aqueous medium and adjusting a polyester resin particle dispersion liquid, wherein the polyol includes an unsaturated polyol, or the polycarboxylic acid includes an unsaturated polycarboxylic acid; and adding a radical polymerization initiator to the polyester resin particle dispersion liquid to cause a radical polymerization reaction, and adjusting the obtained dispersion liquid of polyester resin particles.

Toner manufacturing method

Disclosed is a toner comprising at least a resin and a coloring agent, wherein the resin comprises toner particles in which a polyester resin unit is cross-linked by a diatomic cross-linking group expressed by a following general formula (1):&#x2014;XYX&#x2014;[wherein in the formula, Xdenotes a linking group; and Ydenotes a radical polymer unit having a number average molecular weight Mn ranging from 5000 or more to 50000 or less, and a ratio Mw/Mn ranging from 1.0 or more to 1.2 or less, wherein Mw denotes a weight average molecular weight, and Mn denotes the number average molecular weight].

Toner and toner manufacturing method

Disclosed is a toner including: a resin; coloring agent and release agent including compound or compounds represented by the following general formula (1): R&#x2014;(COO&#x2014;R), wherein Ris a linking group having carbon number of 2 to 8 which may be a cyclic structure and may have a hydroxy group or fatty acid ester group; and each Ris an alkyl group having carbon number of N, (N-2) or (N-4) independently, N is a natural number from 10 to 30, and n is a natural number from 3 to 4, Rwith carbon number of N is 80 to 97 percent by mass, Rwith carbon number of (N-2) is 0.0 to 7.8 percent by mass, Rwith carbon number of (N-4) is 3.0 to 13.0 percent by mass, Rwith carbon number of (N-4) is included 1.5 percent by mass or more than Rwith carbon number of (N-2).

Toner

A toner for an electrophotography and its manufacturing method are disclosed. The toner comprises toner particles containing a cross-linked polymer having two-valent crosslinking group represented by Formula (1), wherein, Ris a hydrogen atom or a chlorine atom, Ris a hydrogen atom, a chlorine atom or a methoxy group. The toner satisfies storage durability against heat as well as sufficient low temperature fixing ability.

Toner and manufacturing method thereof

A preparation method of a toner comprising a binder resin and a colorant is disclosed, comprising forming resin particles containing a resin formed by allowing a styrene monomer, a (meth)acryl monomer and a polymer represented by the formula (1) to react, and mixing the resin particles with colorant particles which were dispersed and allowing the resin particles and the colorant particle to coagulate and fuse to form toner particles,X&#x2014;(Y)&#x2014;X&#x2003;&#x2003;formula (1)wherein X is at least one of an acryloyl group and a methacryloyl group, Y is a radical polymerizable monomer unit and n is an integer of 25 to 1000.

Production method of toner, toner and developer

An electrophotographic toner which is thermally stable in storage or as an image after being fixed and exhibits a sufficiently low melt viscosity and a high fluidity when heated during fixing is disclosed, comprising a colorant and a binder resin, wherein the binder resin contains a poly-branched resin composition in an amount of 0.5 to 20% by mass. There is also disclosed a method of producing the electrophotographic toner.

Electrophotographic toner, electrophotographic developer and production method of electrophotographic toner

A magenta toner for developing an electrostatic image, the magenta toner comprising at least a binder resin and a magenta colorant, wherein the magenta colorant comprises a compound represented by Formula (1), wherein D is represented by one of Formulas (2) to (4): 

Growing community of inventors

Tokyo, Japan

Hiroaki Obata