JP2009262370A5 - - Google Patents

Claims (11)

数平均分子量が３００〜３０万である樹脂（ａ）１００質量部に対して、１分子中に重合性官能基を２個以上有し、かつ該官能基の少なくとも一つがチオール基である多官能チオール化合物（ｂ）を０．１〜１５０質量部、レーザー吸収剤（ｃ）を１〜１００質量部、熱重合開始剤（ｄ）を０．１〜１０質量部を含むレーザー彫刻印刷原版用樹脂組成物。 Polyfunctional having two or more polymerizable functional groups in one molecule and at least one of the functional groups is a thiol group with respect to 100 parts by mass of the resin (a) having a number average molecular weight of 300 to 300,000 Resin for laser engraving printing original plate containing 0.1 to 150 parts by mass of thiol compound (b), 1 to 100 parts by mass of laser absorber (c), and 0.1 to 10 parts by mass of thermal polymerization initiator (d) Composition. 前記多官能チオール化合物（ｂ）が、分子量１万以下の範囲であり、１分子中にチオール基を２個以上有する請求項１に記載のレーザー彫刻印刷原版用樹脂組成物。 The resin composition for a laser engraving printing original plate according to claim 1, wherein the polyfunctional thiol compound (b) has a molecular weight of 10,000 or less and has two or more thiol groups in one molecule . 前記多官能チオール化合物（ｂ）が、分子量１万以下の範囲であり、１分子中にチオール基を３個以上有する請求項１または２に記載のレーザー彫刻印刷原版用樹脂組成物。 The resin composition for a laser engraving printing original plate according to claim 1 or 2, wherein the polyfunctional thiol compound (b) has a molecular weight of 10,000 or less and has three or more thiol groups in one molecule . 前記多官能チオール化合物（ｂ）が、チオグリコール酸誘導体及び／又はメルカプトプロピオン酸誘導体である請求項１〜３の何れか一項に記載のレーザー彫刻印刷原版用樹脂組成物。 The resin composition for a laser engraving printing original plate according to any one of claims 1 to 3, wherein the polyfunctional thiol compound (b) is a thioglycolic acid derivative and / or a mercaptopropionic acid derivative . 前記レーザー吸収剤（ｃ）が、カーボンブラックである請求項１〜４の何れか一項に記載のレーザー彫刻印刷原版用樹脂組成物。 The said laser absorber (c) is carbon black, The resin composition for laser engraving printing original plates as described in any one of Claims 1-4 . 前記熱重合開始剤（ｄ）成分が、有機過酸化物である請求項１〜５の何れか一項に記載のレーザー彫刻印刷原版用樹脂組成物。 The resin composition for a laser engraving printing original plate according to any one of claims 1 to 5, wherein the thermal polymerization initiator (d) component is an organic peroxide. 前記樹脂（ａ）が、分子内に重合性不飽和基を有し、更にカーボネート結合、ウレタン結合、及びエステル結合からなる群より選ばれる少なくとも１種の結合を有する請求項１〜６の何れか一項に記載のレーザー彫刻印刷原版用樹脂組成物。 The resin (a) has a polymerizable unsaturated group in the molecule, and further has at least one bond selected from the group consisting of a carbonate bond, a urethane bond, and an ester bond. The resin composition for a laser engraving printing original plate according to one item . 前記樹脂（ａ）が、下記式（１）で表されるカーボネートの繰り返し単位を含む請求項１〜７の何れか一項に記載のレーザー彫刻印刷原版用樹脂組成物。

（式中、Ｒ _１ は、炭素数２〜５０の直鎖又は分岐した炭化水素基を表し、ｎは、２〜５０の整数を表す。） The resin composition for laser engraving printing original plate as described in any one of Claims 1-7 in which the said resin (a) contains the repeating unit of the carbonate represented by following formula (1) .

(In the formula, R ₁ represents a linear or branched hydrocarbon group having 2 to 50 carbon atoms, and n represents an integer of 2 to 50. ) 請求項１〜８の何れか一項に記載のレーザー彫刻印刷原版用樹脂組成物をシート状あるいは円筒状支持体上に塗布し樹脂層を形成する工程、成形された樹脂層を熱硬化する工程を含むレーザー彫刻用印刷原版の製造方法。 The process of apply | coating the resin composition for laser engraving printing original plates as described in any one of Claims 1-8 on a sheet form or a cylindrical support body, and forming a resin layer, The process of thermosetting the shape | molded resin layer A method for producing an original printing plate for laser engraving . 前記熱硬化する工程の後に、切削、研削、及び研磨から選択される少なくとも１種類の方法で表面調整を行う工程を含む請求項９に記載のレーザー彫刻用印刷原版の製造方法。 The method for producing a printing plate precursor for laser engraving according to claim 9 , further comprising a step of performing surface adjustment by at least one method selected from cutting, grinding, and polishing after the thermosetting step . 請求項９または１０に記載のレーザー彫刻用印刷原版を発振波長２μｍ以下のレーザーで彫刻する工程を含む印刷版の製造方法。 A method for producing a printing plate, comprising the step of engraving the printing plate precursor for laser engraving according to claim 9 or 10 with a laser having an oscillation wavelength of 2 μm or less.