Dainippon Ink and Chemicals, Incorporated

Dic Corporation

Sun Chemical Corporation

Artur Lachowicz

Gerwald F Grahe

Kai-uwe Gaudl

Kai-Uwe Gaudl

Koujirou Tanaka

Steven H Nahm

Andreas Hoffmann

Kouichi Yokota

Jens Ferbitz

Yu Jing

Wu Guanghui

Ken-ichi Yatsugi

F Gerwald Grahe

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 ultraviolet curable resin composition, which comprises a cationic photopolymerization initiator (B) and a urethane prepolymer (A) having a structure represented by the general formula (); (wherein Rand Reach independently represent an alkylene group, R, Rand Reach independently represent an alkyl group or hydrogen atom, Rand Reach independently represent an alkylene group having 2 to 4 carbon atoms, a represents 0 or 1, and b and c each independently represent an integer of 0 to 10).

Ultraviolet-curable resin composition containing a polyfunctional oxetanyl group

The present invention relates to a composition which is curable by radiation such as an ultraviolet ray or an electron beam. Specifically, the present invention relates to a curable composition which is useful for coatings and inks. The present invention provides a radiation curable composition that is highly cationically polymerizable and highly adhesive to substrates. A radiation curable composition of the present invention includes, as essential ingredients, a cationically polymerizable compound (a) represented by the following general formula 1 (wherein, R represents an alkyl group of 1 to 10 carbon atoms, Rrepresents a hydrogen atom or a methyl group, n represents a number from 1 to 4, and m represents a number from 0 to 10); a cationic photoinitiator (b); and water (c).

Radiation curable composition and method for producing the same

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 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

Propylene ureas and process for their preparation

A process is described for the production of 3-alkyl-3-hydroxymethyloxetanes of the general formula (1), ##STR1## in which R.sup.1 denotes a linear or branched C.sub.1 -C.sub.12 alkyl group, which process comprises reacting a trimethylolalkane of the general formula (2),

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Berlin, Germany

Artur Lachowicz