Toyo Boseki Kabushiki Kaisha

Akira Tomita

Keizo Kawahara

Masaru Nanpei

Toshihiko Kajima

Toru Wada

Kuniomi Etoh

Noriko Takahashi

Shigenori Nagahara

Toshiaki Fujimura

Masaru Nampei

Hiroshi Satomi

Tomonori Hiramatsu

The present invention is to obtain without any trouble a photosensitive resin composition, a photosensitive layer and a photosensitive resin printing original plate, which are developable with an aqueous developer, resistant to an aqueous ink and a cosolvent ink, and assured of good image reproducibility. The present invention relates to a photosensitive resin composition comprising (A) hydrophobic polymers obtained from at least two or more water dispersion latexes, (B) a photopolymerizable compound and (C) a photopolymerization initiator, wherein the two or more hydrophobic polymers each is present in a fine particle state.

Photosensitive resin composition, photosensitive layer using the same and photosensitive resin printing original plate

Disclosed herein are an adhesive or anti-tack layer for photopolymer printing plate capable of development with aqueous or semi-aqueous processing liquid, characterized in having an absorbance of 0.010 to 0.060 per .mu.m thickness at 1140 cm.sup.-1 and also a composition for forming the adhesive layer defined above, characterized in containing polyvinyl alcohol and a water-soluble a crystallizing agent having a boiling point of 120.degree.-240.degree. C. The adhesive layer is resistant to wrinkling and superior in storage stability. It can be produced efficiently.

Anti-tack layer for photopolymer printing plate and composition for

A photosensitive resin composition includes (A) a hydrophobic polymer having a glass transition temperature not greater than 5.degree. C., (B) a hydrophilic polymer, (C) an ethylenically unsaturated compound, (D) a solvent capable of dissolving the component (B) more than the component (A) and (E) a photopolymerization initiator, with the content of component (B) being less than that of component (A). The resin composition can be used to prepare a printing plate having a base, a photosensitive resin layer and a covering layer arranged one over another. The photosensitive resin layer contains a dispersed phase which includes particles having a phase which includes a hydrophobic polymer, surrounded by a phase which includes a hydrophilic polymer. The photosensitive resin layer can be prepared by removing the solvent (D) to a content of 0.001-2% by weight.

Photosensitive resin composition

A photosensitive resin composition for a flexographic printing plate which comprises:

Flexographic cured printing plate comprising a chlorinated polymer and a

The invention provides a photosensitive resin composition containing a soluble synthetic linear high-molecular compound in an amount of 25 to 95 weight percent based on the whole composition, a monomer having at least one photopolymerizable unsaturated bond and a photopolymerization initiator and characterized in that part or all of the soluble synthetic linear high-molecular compound is an addition polymer of an organic diisocyanate compound with an amide compound, both terminals of the amide compound being either primary or secondary amide groups and the equivalent ratio of amino groups to isocyanate groups in the addition polymer is not less than 1.0. The high-molecular weight compound makes up at least 50% by weight base on the total amount of the polymer material present in the composition.

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Ootsu, Japan

Akira Tomita