Dai-ichi Kogyo Seiyaku Co., Ltd.

Naohiro Takamura

Masato Kameda

Manabu Kikuta

Teruaki Sugahara

An alkylene oxide-modified polyfunctional (meth)acrylate is provided wherein the problems according to high crystallinity or high viscosity are improved, and the photosensitivity, etc. is enhanced. The compound has a structure represented by the following formula (I), provided that in the formula (I), R represents a substituent represented by the formula (II); AO represents one member or two or more members selected from alkylene oxide units represented by &#x2014;CHCHO&#x2014;, &#x2014;CHCH(CH)O&#x2014;, &#x2014;CHCHCHCHO&#x2014; and &#x2014;CHCH(CH)O&#x2014;; l indicating the average polymerization degree of the added alkylene oxide is 0&#x3c;l&#x2264;5; the average value of m is more than 0 and 6 or less; each of the average values of n and o is from 0 to 6, the total value of m, n and o is 6, and in the formula (II), Rrepresents a hydrogen atom or a methyl group. 

Alkylene oxide-modified dipentaerythritol (meth)acrylate and reactive composition containing same

The present invention provides a curable resin composition excellent in dispersion stability and capable of bettering various physical properties of hard coating films to be formed through curing, without requiring surface treatment of inorganic microparticles of silica or the like and use of dispersant. The curable resin composition contains an alkylene oxide-modified dipentaerythritol (meth)acylate and, as dispersed therein, surface-untreated inorganic microparticles having a mean particle size of from 1 to 150 nm. A ratio of inorganic microparticles in a total weight of these is from 10 to 45% by weight and a content of solvent is 1% by weight or less.

Curable resin composition, and composition for hard coat

The present invention is directed to a urethane acrylate containing a reaction product of an alkylene oxide-modified dipentaerythritol (meth)acrylate.

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Kyoto, Japan

Naohiro Takamura