Toyo Ink Manufacturing Company

Ryozo Konno

Kiyoshi Goto

Toru Matsubara

Masujiro Sumita

Akira Ikeda

Toshimitsu Ugai

Toru Takeuchi

Akio Hirose

A photocurable resin composition comprising a photopolymerizable photosensitizing compound (A) together with or without a photopolymerizable photosensitizing compound (B), the compound (A) being prepared by esterifying with acrylic or methacrylic acid or the like a resin having an OH equivalent of 150 - 500 produced by esterification of a dialkylaminobenzoic acid, a polybasic acid or, if desired, a fatty acid having at least 9 carbon atoms, with a polyhydric alcohol, and the compound (B) being prepared by repeating the aforesaid process for preparing the compound (A) except that a carboxyl group-containing benzophenone derivative is substituted for the dialkylaminobenzoic acid.

Photocurable resin compositions

Ultraviolet light curable coating compositions comprising (1) a monomer and/or prepolymer containing at least one radically crosslinkable ethylenically unsaturated double bond and (2) a photopolymerization initiator containing (a) 4,4'-bis(diethylamino)benzophenone and (b) a lower alkyl ester of p- or o-benzoylbenzoic acid or a derivative thereof in a weight ratio of (a) to (b) of 1 : 1 to 1 : 10.

Ultraviolet light curable coating compositions

A photosensitive coating composition comprising (1) a prepolymer containing radically cross-linkable ethylenically unsaturated double bonds and (2) a sensitizer which comprises predominantly a mixture of (a) benzophenone, halogenated benzophenone or a combination thereof and (b) 4,4'-bis(diethylamino)benzophenone in a weight ratio of about 1:2 to 10:1.

Photosensitive coating composition

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Tokyo, Japan

Ryozo Konno