Canon Kabushiki Kaisha

Kenji Nishiguchi

Yuko Nishiwaki

Katsuhiro Hayashi

Takeshi Miyazaki

Kohei Watanabe

Junichi Sakai

Yoshihisa Yamashita

Mitsuru Ishii

Ryoichi Matsuda

Sachie Furukawa

Aki Takano

Hiroshi Tomioka

Daiji Okamura

Yoichi Takada

Hirofumi Ichinose

Kei Inoue

Hideki Takayama

Kousuke Yamasaki

Shin-ichi Sato

Yoshio Nakajima

Tetsu Iwata

Yuuki Nishino

Yuhei Shimizu

The present invention can provide a liquid developer that can accommodate faster process speeds by image forming apparatuses, in which the liquid developer contains a toner particle comprising a polyester resin, and a carrier liquid having a vinyl ether compound. The liquid developer further contains a polymer compound having a structural unit represented by formula (1) in either of the toner particle or the carrier liquid. 

Liquid developer

Provided is a synthesis method for a self-dispersible pigment, including performing ring-opening addition of a lactone-based compound to an acidic group bonded to a surface of a pigment particle directly or via another atomic group to bond a functional group including an ester group to the surface of the pigment particle.

Synthesis method for self-dispersible pigment, self-dispersible pigment, ink jet ink, ink cartridge, and ink jet recording method

To provide an ink jet ink capable of achieving both high colorability and excellent bleeding resistance of an image and having excellent storage stability, provided is an ink jet ink including at least a pigment and a star polymer having a structure represented by at least one formula selected from the group consisting of the following general formulae (1) to (3).R&#x2014;(S&#x2014;R')&#x2003;&#x2003;General formula (1)R&#x2014;(X&#x2014;S&#x2014;R&#x2032;)&#x2003;&#x2003;General formula (2)R&#x2014;(O&#x2014;X&#x2014;S&#x2014;R&#x2032;)&#x2003;&#x2003;General formula (3)

Ink jet ink, ink jet recording method, and ink cartridge

The present invention provides cellular screening substrata which can be formed in simple processing steps. The cellular screening substrata can be formed which are characterized in that plural cellular screening substances are positioned and immobilized at predetermined positions on a base by micro-droplet discharging means, and plural areas having different cellular screening functions are formed thereon.

Manufacturing process for cellular screening substratum, resultant substratum, and method and apparatus for screening

An ink jet ink including a pigment and an ABC triblock polymer, wherein the above-described ABC triblock polymer is formed from an A block having an aryl group, a B block having a unit represented by the following general formula (1), and a C block having a unit represented by the following general formula (2). 

Ink jet ink, ink cartridge, and ink jet recording method

An ink jet aqueous ink including an ABC triblock polymer and a polymer emulsion, wherein the above-described ABC triblock polymer is formed from an A block having a unit represented by the following general formula (1), a B block having a unit represented by the following general formula (2), and a C block having a unit represented by the following general formula (3). 

Ink jet aqueous ink, ink cartridge, and ink jet recording method

An ink jet liquid composition which is used with an ink containing a pigment and which contains an ABC triblock polymer formed from an A block having an aryl group, a B block having a unit represented by the general formula (1), and a C block having a unit represented by the general formula (2), wherein an acid value of the polymer is 20 mgKOH/g or more and less than 150 mgKOH/g, the ratio of the number average molecular weight of the polymer to the acid value is 50 or more and 200 or less, the proportion of the A block in the polymer is 20.0 percent by mass or more and 80.0 percent by mass or less and is 5.0 times or more and 15.0 times or less the proportion of units derived from all acidic monomers contained in the polymer. 

Ink jet liquid composition, set, liquid cartridge, and ink jet recording method

Provided is an ink jet clear ink containing a polymer fine particle. The polymer fine particle has a core-shell structure obtained by polymerizing an &#x3b1;,&#x3b2;-ethylenically unsaturated hydrophobic monomer (b) as a core polymer in the presence of a shell polymer that is a copolymer having at least a unit derived from an &#x3b1;,&#x3b2;-ethylenically unsaturated hydrophobic monomer (a) and a unit derived from a monomer selected from an &#x3b1;,&#x3b2;-ethylenically unsaturated acid monomer and a salt thereof. The &#x3b1;,&#x3b2;-ethylenically unsaturated hydrophobic monomer (b) includes at least a monomer containing a chain structure saturated alkyl group.

Clear ink, ink jet recording method, ink set, ink cartridge, recording unit and ink jet recording apparatus

An ink-jet recording pigment ink comprises water, a pigment, a water-soluble organic solvent and a copolymer; the copolymer being obtained by copolymerizing a silicone type macromer having a vinyl group, represented by the following Formula (1), a vinyl monomer having a hydrocarbon group having 1 to 8 carbon atoms, represented by the following Formula (2), and a monomer having an anionic functional group. 

Ink-jet recording pigment ink

An ink set includes a combination of a first ink and a second ink, the first ink containing a self-dispersion pigment having at least one hydrophilic group directly or through another atomic group bonded to the surface of the pigment particle, and ammonium ions, the second ink containing a pigment, a polymer having an acid value of 160 mg KOH/g or less, and alkali metal ions, wherein the first ink further contains a compound (A) selected from nonionic surfactants and/or a compound (B) selected from the group consisting of polyethylene glycol with an average molecular weight of 600 to 2,000, &#x3b1;,&#x3c9;-alkanediol having six carbon atoms, and an imidazolidinone derivative.

Ink set, ink jet recording method, ink cartridge, recording unit, and ink jet recording apparatus

Provided is an ink jet ink capable of achieving both high colorability and excellent bleeding resistance of an image. The ink jet ink includes at least a pigment and a star polymer in which at least three copolymer chains of &#x3b1;,&#x3b2;-ethylenically unsaturated monomers are bonded to a central skeleton, in which the copolymer chains of the &#x3b1;,&#x3b2;-ethylenically unsaturated monomers are copolymers of at least one first monomer selected from the group consisting of aromatic (meth)acrylates and aromatic (meth)acrylamides and at least one second monomer selected from the group consisting of acid monomers and salts of the acid monomers.

An ink jet pigment ink containing water, a pigment, a water-soluble organic solvent and a graft copolymer, wherein the graft copolymer has a hydrophilic segment and a hydrophobic segment, the hydrophobic segment is being obtained by copolymerizing an anionic monomer and an aromatic monomer represented by the following formula (1), and the hydrophilic segment is being obtained by polymerizing an anionic monomer wherein Ar is an aromatic ring selected from a benzene ring, a condensed benzene ring and a hetero-aromatic ring, or a derivative thereof, R is H or CH, and X is O or NH.

Ink jet pigment ink and ink set

An ink jet recording apparatus is provided with a plurality of inks and includes a unit configured to perform a recovery operation by suction of inks from a plurality of ink ejection portions using a suction cap, wherein the plurality of inks include an ink set including a combination of at least a first ink and a second ink, the first ink containing (i) a self-dispersion pigment having at least one hydrophilic group directly or through another atomic group bonded to the surface of the pigment, and (ii) ammonium ions, the second ink containing a pigment, a polymer having an acid value of 160 mg KOH/g or less, and alkali metal ions, and the suction cap used in the recovery operation is individually provided for each of the first ink and the second ink.

Ink jet recording apparatus and ink jet recording method

A pigment ink for ink jet recording containing a pigment, water, a graft copolymer and a water-soluble organic solvent, in which a hydrophobic segment constituting the graft copolymer is obtained by copolymerizing a monomer represented by the following formula (1), having an aromatic ring or the like and a monomer having an anionic functional group, and a hydrophilic segment constituting the graft copolymer is obtained by polymerizing a monomer having an anionic functional group: wherein Ar represents an aromatic ring selected from a benzene ring, a condensed benzene ring and a heteroaromatic ring, or a derivative thereof.

Pigment ink for ink jet recording

The present invention relates to a substrate for cell culture capable of controlling at least one function selected from adhesion, proliferation, differentiation, survival, maintenance of undifferentiated state, and apoptosis of a cell. The substrate comprises an immobilization area of controlling substances involved in at least one of the functions of adhesion, proliferation, differentiation, survival, maintenance of undifferentiated state and apoptosis of cells, for example: and the areas are formed by supplying a liquid containing the controlling substances to the substrate by small microdroplet ejection means and immobilizing the controlling substance on the substrate.

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Yokohama, Japan

Kenji Nishiguchi