Dainippon Ink and Chemicals, Incorporated

Sun Chemical Corporation

Dic Corporation

Kai-uwe Gaudl

Gerwald F Grahe

Artur Lachowicz

Juergen Dieker

Steven H Nahm

Ken-ichi Yatsugi

Jens Ferbitz

Yu Jing

Wu Guanghui

F Gerwald Grahe

The present invention is directed to photoactive resins employed in radiation curable compositions and ink. The radiation curable compositions include mono or multi-functional acrylates, an amine and the above-mentioned photoactive resin. Radiation curable inks at least include the components of the radiation curable composition in addition to colorants.

Photoactive resins, radiation curable compositions and radiation curable inks

The invention describes curable liquid acryloyl group containing compositions, which are produced by reacting monofunctional vinyl compounds and multifunctional acrylic esters with &#x3b2;-dicarbonyl group containing compounds having two activated hydrogen atoms in its methylene position. These material can be polymerized or crosslinked by free radical polymerization, UV (ultraviolet) or electron-beam radiation. The curable liquid compositions are suitable for producing curable coatings, printing inks, adhesives, or molding compositions.

Curable liquid acryloyl group containing resin composition

An ink formulation comprising an acrylated resin prepared by mixing a hydroxyalkyl acrylate and an isocyanate and reacting said mixture with a resin containing one or more hydroxyl functional groups and derived from a natural product.

Acrylated natural resins

An acrylated resin prepared by mixing a hydroxyalkyl acrylate and an isocyanate and reacting said mixture with a resin containing one or more hydroxyl functional groups and derived from a natural product.

A curable resin composition which exhibits excellent hardness of their curing products as well as storage stability is provided, and a simple method to obtain acrylated resins is provided. The composition comprises a curable oligomer which has an acryloyl group and a substituted methacrylate group represented by the following structure The process comprises a reaction step of reacting at least one monomeric multifunctional acrylate in the presence of a tertiary organic phosphine.

Curable resin compositions and process for preparing oligomers containing acrylate groups and substituted methacrylate groups

A photoinitiator is provided which exhibits excellent photosensitivity, yields colorless products, and is usable in thick layer UV curable coating. A novel chemical compound is also provided which is usable for the photoinitator. Photocurable composition is also provided which has these properties. The photoinitiator consists essentially of a compound having a molecular weight of 1000 or less, and having a chemical structure represented by the following formula (1), wherein Rand Rindependently denote a specific alkyl group, and Rand Rindependently denote an electron attracting group or a specific alkyl group, and weight percentage of a chemical structure element represented by the following formula (2), which is expressed in formula (1) based on the total molecular weight of the compound, is 17% to 54% by mass.

Photoinitiator, novel compound, and photocurable composition

A method of acrylating a resin containing one or more hydroxyl functional group and derived from a natural product, comprising preparing a mixture of a hydroxyalkyl acrylate and an isocyanate; and reacting said mixture with said resin.

A photocurable composition is provided which yields an excellent tack-free, hard cured product without any addition of photoinitiators. A photocurable composition which is excellent in storage stability is also provided. The photocurable composition contains a resin having an acryloyl group and a chemical structure element selected from the group consisting of &#x3b2;-diketone groups and &#x3b2;-ketoester groups, wherein the &#x3b2;-diketone group or the &#x3b2;-ketoester group has a tetra-substituted carbon atom between two carbonyl groups, which is capable of generating one or two free radicals under photoirradiation, and the photocurable composition does not increase more than 25% in viscosity when heated at 60&#xb0; C. for 5 days.

Photocurable composition, process for producing photocurable resin, and crosslinked product

A catalyst suitable for crosslinking reaction of a compound containing &#x3b1;,&#x3b2;-unsaturated carbonyl groups and a compound containing a CH-acidic methylene group is provided. A curable mixture comprises at least one compound containing at least two &#x3b1;,&#x3b2;-unsaturated carbonyl groups and at least one compound containing at least one CH-acidic methylene group and at least one trialkylphosphine.

Curable mixtures

A curable resin composition which exhibits no drawbacks such as yellowing and exhibits excellent hydrolysis sensitivity is provided, and a process for preparing curable oligomers and polymers which has foregoing properties is provided. The composition comprises a curable oligomer or polymer, wherein the oligomer or polymer has an acryloyl group, a &#x3b2;-dicarbonyl group having a chemical structure part represented by any of the following structures,and a substituted methacrylate group represented by the following structure:

Curable resin compositions and process for preparing oligomers and polymers having acryloyl groups, substituted methacrylate groups and &#x3b2;-dicarbonyl groups

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Hohen Neuendorf, Germany

Kai-uwe Gaudl