Dainippon Ink and Chemicals, Incorporated

Dic Corporation

Other

Yushiro Chemical Industry Co., Ltd.

Naohito Saito

Yasuyuki Watanabe

Yutaka Yamada

Yasuhiko Kojima

Koji Oe

Maiko Kitade

Yasuyuki Suzuki

Eiji Hayakawa

Katsuji Takahashi

Hisatomo Yonehara

Michiya Nakashima

Shinji Shimizu

Nansei Tashiro

Kazunari Kawai

Osamu Oshima

Hisao Yamaguchi

Toshihiro Ebine

Tsuyoshi Masuda

Hiromiti Tomihari

Masaki Muto

To provide an actinic-ray-curable ink set for ink-jet recording which is excellent in thick-film curability even when a UV-LED lamp is used as a light source, and has uniform curing sensitivity across different colors. The present invention relates to an actinic-ray-curable ink set for ink-jet recording, characterized in that a cyan ink contains a phthalocyanine pigment, a radical polymerizable compound, and less than 10% by mass of a photopolymerization initiator based on the total amount of the cyan ink, a magenta ink contains a quinacridone-based pigment, a radical polymerizable compound, and less than 5% by mass of a photopolymerization initiator based on the total amount of the magenta ink, a yellow ink contains an azo pigment, a radical polymerizable compound, and less than 10% by mass of a photopolymerization initiator based on the total amount of the yellow ink, and a black ink contains a carbon black, a radical polymerizable compound, and less than 12% by mass of a photopolymerization initiator based on the total amount of the black ink.

Actinic-ray-curable ink set for ink-jet recording

An active-energy-ray-curable ink jet recording ink composition is provided, in which (1) a polymerizable compound having an active-energy-ray-polymerizable group and a polymerizable compound having at least two active-energy-ray-polymerizable groups are used in amounts of 10 to 25 mass % and 75 to 90 mass % relative to the total amount of the active-energy-ray-polymerizable compounds, respectively; (2) the polymerizable compound having an active-energy-ray-polymerizable group includes 10 to 20 mass % of N-vinylcaprolactam; and (3) the polymerizable compound having at least two active-energy-ray-polymerizable groups includes 15 to 35 mass % of 2-(2-vinyloxyethoxy)ethyl(meth)acrylate. Furthermore, a method for forming an image is provided.

Active-energy-ray-curable ink jet recording ink composition and method for forming image

An active-energy-ray-curable inkjet recording ink composition is provided, in which a polymerizable compound having an active-energy-ray-polymerizable group and a polymerizable compound having at least two active-energy-ray-polymerizable groups are used in amounts of 60 to 95 mass % and 5 to 40 mass % relative to the total amount of the active-energy-ray-polymerizable compound, respectively; the polymerizable compound having an active-energy-ray-polymerizable group includes N-vinyl-2-caprolactam and isobornyl acrylate in amounts of 1 to 15 mass % and 1 to 25 mass % relative to the total amount of the active-energy-ray-polymerizable compound, respectively; and the polymerizable compound having at least two active-energy-ray-polymerizable groups includes a polymerizable compound having a vinyl ether group. Furthermore, a method for forming an image is provided.

Active-energy-ray-curable inkjet recording ink composition and method for forming image

The object of the present invention is to provide an active energy ray-curable ink-jet printing ink, including: a coloring agent; a compound having an ethylenic double bond; and a photo-polymerization initiator, wherein the photo-polymerization initiator includes a compound represented by general formula (1): (wherein A represents any one of &#x2014;O&#x2014;, &#x2014;CH&#x2014;, &#x2014;CH(CH)&#x2014;, and &#x2014;C(CH)&#x2014;; and each of Rand Rindependently represents a hydrogen atom, a methyl group, or a trimethylsilyl group), and an &#x3b1;-aminoketone-based compound and/or an acyl phosphine oxide-based compound, and 40% by mass or more of the compound represented by general formula (1) is included with respect to the total photo-polymerization initiator.

Active energy ray-curable ink-jet printing ink

An ion conductor has fine particles of an organic polymer including 20 to 80% by mass of ultra-fine particles of an inorganic compound, and an electrolytic solution impregnated into the fine particles of the organic polymer, wherein the fine particles of the organic polymer have a specific surface area measured by the BET method of 30 m/g or more.

Ion conductor and electrochemical display device utilizing the same

A negative-working CTP plate which is superior in resolution and printing resistance of the image area of a press plate is provided, which is obtained by forming a latent image on a heat-sensitive layer in a heat-sensitive lithographic printing plate comprising a substrate having a hydrophilic surface and a heat-sensitive layer made of an alkali-soluble polymer formed on the surface of the substrate, using heat generated upon irradiation with laser light, and developing the heat-sensitive layer using an alkaline developing solution. In the heat-sensitive lithographic printing plate comprising a substrate having a hydrophilic surface, and a heat-sensitive layer made of an alkali-soluble polymer formed on the surface of the substrate, an advancing contact angle (&#x3b8;) of the surface of the heat-sensitive layer with water at 25&#xb0; C. is within a range from 70&#xb0; to 110&#xb0;, a receding contact angle (&#x3b8;) of the surface of the heat-sensitive layer with water at 25&#xb0; C. after heating at 150&#xb0; C. for 3 minutes is larger than a receding contact angle (&#x3b8;) of the surface of the heat-sensitive layer with water at 25&#xb0; C. before heating, and a difference in receding contact angle before and after heating, (&#x3b8;&#x2212;&#x3b8;), is larger than 1&#xb0; and is smaller than 40&#xb0;.

Heat-sensitive lithographic printing plate and image forming method

The present invention relates to a lithographic printing plate in which images can be inscribed by laser beams, and which has high resolving power, high sensitivity, and the improved reservation stability, and relates to its image-producing method, and a photosenstitive composition which can preferably be used as an original plate for lithographic printing. The photosenstitive composition includes an aqueous resin composition including fine particles (a) of a resin having at least one neutralized anionic group and having a heat fusion property, and a water soluble resin (b) having at least one neutralized anionic group, wherein the water soluble resin (b) is included in a range of 1 to 30% by weight, relative to the total weight of the aqueous resin composition; and a substance (c) which absorbs light and generates heat.

Photosensitive composition, original plate using the same for lithographic printing, and method for producing images on original plate

In order to provide a computer-to-plate (CTP) plate in which an image can be inscribed by a laser beam having Ithe maximum strength in a near infrared or infrared region, and heat processing is not necessary prior to developing a latent image, and which allows the use of a conventional printing apparatus as it is upon printing, (I) a lithographic printing plate is provided which has on a substrate, a photosensitive layer comprising a photosensitive composition containing a crosslinking agent, an aqueous dispersion of resin fine particles made of a resin which is self water-dispersible having a carboxylic group and a functional group capable of performing cross-linking reactions with the crosslinking agent, and an infrared absorption agent; and (II) an image forming method is provided which is characterized in that after an image has been formed on a photosensitive layer of the lithographic printing plate set forth in the above (I) by using a laser beam, the image is subjected to wet development.

Lithographic printing plate and image forming method

A composition for temporary protection paint, containing alkali-soluble resin and an ester phosphite compound.

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Sakura, Japan

Naohito Saito