JP2022501223A - 平版印刷版原版および発色組成物 - Google Patents
平版印刷版原版および発色組成物 Download PDFInfo
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- JP2022501223A JP2022501223A JP2021515566A JP2021515566A JP2022501223A JP 2022501223 A JP2022501223 A JP 2022501223A JP 2021515566 A JP2021515566 A JP 2021515566A JP 2021515566 A JP2021515566 A JP 2021515566A JP 2022501223 A JP2022501223 A JP 2022501223A
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Abstract
Description
(a)酸発生剤と;
(b)テトラアリールボレートと;
(c)酸感受性染料前駆体と;
(d)以下の構造(I):
を有する化合物と
を含む、発色組成物を提供する。
親水性表面を含む基板と;
基板の親水性表面上に配置される放射感受性画像形成層であって、
1つまたは複数のフリーラジカル重合性成分と、
1つまたは複数の放射吸収剤と、
(a)酸発生剤;
(b)テトラアリールボレート;
(c)酸感受性染料前駆体;および
(d)以下の構造(I):
からなる発色組成物と、
場合により、前記1つまたは複数のフリーラジカル重合性成分と異なるポリマーバインダーと
を含む放射感受性画像形成層と
を含み、
場合により、放射感受性画像形成層の上に配置された保護層を含む、平版印刷版原版を提供する。
A)本明細書に記載される任意の実施形態による平版印刷版原版を放射で画像様露光して、放射感受性画像形成層に露光領域および非露光領域を得る工程と;
B)放射感受性画像形成層の非露光領域を除去する工程と
を含む方法を提供する。
B)平版印刷インク、湿し水、または平版印刷インクと湿し水の組み合わせを使用して、オンプレスで放射感受性画像形成層の非露光領域を除去する工程
によって行うことができる。
発色組成物、放射感受性画像形成層配合物および本発明の実施で使用される他の材料の種々の成分を定義するために本明細書で使用する場合、特に指示しない限り、単数形「a」、「an」および「the」は成分の1つまたは複数を含む(すなわち、複数指示対象を含む)ことを意図している。
本発明による発色組成物は、画像形成平版印刷版原版にプリントアウト画像を提供するのに有用であり、これは、平版印刷インク、湿し水またはその両方を使用するプレス操作中にオンプレスでの平版印刷用の平版印刷版を形成するのに有用である。これらの原版は、以下のように記載される構造および成分で調製される。
本発明による発色組成物は、以下のように定義される少なくとも4つの成分:(a)〜(d)を含む。
1つまたは複数の(a)酸発生剤は、少なくとも1%の固形分および15%以下の固形分、またはより可能性が高くは少なくとも3%の固形分および10%以下の固形分の量で存在することができる。
本発明による原版は、以下に記載されるネガ型放射感受性組成物を適切な基板(以下に記載される)に適切に適用してネガ型の放射感受性画像形成層を形成することによって形成することができる。一般に、放射感受性組成物(および結果として生じる放射感受性画像形成層)は、1つまたは複数のフリーラジカル重合性成分、1つまたは複数の放射吸収剤、上記の発色組成物、および場合により、1つまたは複数のフリーラジカル重合性成分と異なるポリマーバインダーを含む。一般に、各原版にはただ1つの放射感受性画像形成層が存在する。これは一般に原版の最外層であるが、いくつかの実施形態では、放射感受性画像形成層の上に配置された、以下に記載される、最外水溶性親水性保護層(トップコートまたは酸素バリア層としても知られている)が存在することができる。
本発明による原版を調製するために使用される基板は、一般的に親水性画像形成側平面表面、または少なくとも適用された放射感受性画像形成層より親水性の表面を有する。基板は、平版印刷版原版を調製するために慣用的に使用されているいずれの材料で構成されていてもよい支持体を含む。
放射感受性組成物(およびこれから調製される放射感受性画像形成層)は、「ネガ型」となるように設計され、各々がフリーラジカル開始反応を使用して重合することができる1つまたは複数のフリーラジカル重合性基を含有する1つまたは複数のフリーラジカル重合性成分を含む。いくつかの実施形態では、放射感受性画像形成層が、各分子中に同じまたは異なる数のフリーラジカル重合性基を有する2つ以上のフリーラジカル重合性成分を含む。
1つまたは複数の(a)酸発生剤は、少なくとも1重量%および15重量%以下、または少なくとも3重量%および10重量%以下の量で存在することができる。
t=w/r
(式中、wはg/m2の放射感受性画像形成層の乾燥コーティング被覆度であり、rは1 g/cm3である)。例えば、このような実施形態では、ポリマーバインダーが、放射感受性画像形成層の平均乾燥厚さ(t)の少なくとも0.05%および80%以下、より可能性が高くは少なくとも10%および50%以下を構成することができる。
本発明のいくつかの実施形態では、放射感受性画像形成層が、その上に層が配置されていない最外層であるが、本発明による原版を、親水性保護層(当技術分野では親水性オーバーコート、酸素バリア層またはトップコートとしても知られている)を放射感受性画像形成層の直ぐ上に配置して(これらの2つの層の間に中間層はない)設計することが可能である。
使用中、本発明の放射感受性平版印刷版原版を、放射感受性画像形成層中に存在する放射吸収剤に応じて、適切な露光放射源に露光することができる。放射感受性画像形成層が赤外線吸収剤を含むいくつかの実施形態では、対応する平版印刷版原版を、少なくとも750nmおよび1400nm以下、または少なくとも800nmおよび1250nm以下の範囲内の有意な赤外線を放出する赤外線レーザーで画像形成することができる。
画像様露光後、放射感受性画像形成層に露光領域および非露光領域を有する露光された放射感受性平版印刷版原版をオンプレスで処理して、非露光領域(およびこのような領域上の任意の親水性保護層)を除去する。平版印刷中、あらわにされた親水性基板表面はインクを跳ね返し、残りの露光領域は平版印刷インクを受容する。
1.
(a)酸発生剤と;
(b)テトラアリールボレートと;
(c)酸感受性染料前駆体と;
(d)以下の構造(I):
を有する化合物と
を含む、発色組成物。
親水性表面を含む基板と;
基板の親水性表面上に配置される放射感受性画像形成層であって、
1つまたは複数のフリーラジカル重合性成分と、
1つまたは複数の放射吸収剤と、
実施形態1から18のいずれかに記載の発色組成物と、
場合により、1つまたは複数のフリーラジカル重合性成分と異なるポリマーバインダーと
を含む放射感受性画像形成層と
を含み、
場合により、放射感受性画像形成層の上に配置された保護層を含む、平版印刷版原版。
A)実施形態19から24のいずれかに記載の平版印刷版原版を放射で画像様露光して、放射感受性画像形成層に露光領域および非露光領域を得る工程と;
B)放射感受性画像形成層の非露光領域を除去する工程と
を含む方法。
B)平版印刷インク、湿し水、または平版印刷インクと湿し水の組み合わせを使用して、オンプレスで放射感受性画像形成層の非露光領域を除去する工程
を含む、実施形態25に記載の方法。
実施例1および比較例1〜3の平版印刷版原版は、アルミニウム支持体(塩酸で電気化学的に粗化され、リン酸で陽極酸化され、ポリアクリル酸でさらに処理された)に、発色組成物を含有する以下の放射感受性画像形成層配合物を適用することによって調製した。表Iに示される材料(部)を、32重量%のn−プロパノール、10重量%の2−メトキシプロパノール、40重量%の2−ブタノンおよび18重量%の水を含有する溶媒混合物に5重量%の全固形分で溶解または分散した。放射感受性画像形成層配合物を、巻線型コーティングバーを使用して適用し、80℃で2分間乾燥させて、1g/m2の乾燥被覆度を有する放射感受性画像形成層を得た。
ポリマー1は、ポリマー分散液から適用され、その開示がこの調製について参照により本明細書に組み込まれる、米国特許7592128号明細書(Huangら)のポリマーAのように調製された、アクリロニトリル、スチレンおよびポリエチレングリコールメチルエーテルメタクリレート(MW 2000)から誘導されたコポリマーである。
放射感受性画像形成層中の4−クロロカテコールを以下の表IIIに示される化合物で置き換えて、実施例1を繰り返した。
この原版シリーズの配合物の各々のバランスをとるためにポリマー1の量を調整しながら、エチル3,4−ジヒドロキシベンゾエート(EDB)の量を以下の表IVに示すように変化させたことを除いて、実施例3を11の原版試料について繰り返した。
親水性表面を含む基板と;
基板の親水性表面上に配置される放射感受性画像形成層であって、
1つまたは複数のフリーラジカル重合性成分と、
1つまたは複数の放射吸収剤と、
本発明の発色組成物と、
場合により、前記1つまたは複数のフリーラジカル重合性成分と異なるポリマーバインダーと
を含む放射感受性画像形成層と
を含み、
場合により、放射感受性画像形成層の上に配置された保護層を含む、平版印刷版原版を提供する。
本発明による発色組成物は、画像形成平版印刷版原版にプリントアウト画像を提供するのに有用であり、これは、平版印刷インク、湿し水またはその両方を使用するプレス操作中にオンプレスでの平版印刷用の平版印刷版を形成するのに有用である。
Claims (22)
- 前記少なくとも1つのR置換基のパラハメットσ値の合計が0より大きい、請求項1に記載の発色組成物。
- 前記(a)酸発生剤がオニウム塩である、請求項1に記載の発色組成物。
- 前記(a)酸発生剤および前記(b)テトラアリールボレートが、酸発生カチオンおよびテトラアリールボレートアニオンを含む1つの分子として発色組成物中に存在する、請求項1に記載の発色組成物。
- 前記(a)酸発生剤がヨードニウムカチオンを有するオニウム塩である、請求項1に記載の発色組成物。
- 前記(d)構造(I)の化合物が、アルキル3,4−ジヒドロキシベンゾエート、アルキルガレート、4−クロロカテコール、4−ニトロカテコール、および3,4−ジヒドロキシベンゾニトリルからなる群から選択される、請求項1に記載の発色組成物。
- 前記(d)構造(I)の化合物と前記(b)テトラアリールボレートのモル比が少なくとも0.25:1および3:1以下である、請求項1に記載の発色組成物。
- 親水性表面を含む基板と;
前記基板の前記親水性表面上に配置される放射感受性画像形成層であって、
1つまたは複数のフリーラジカル重合性成分と、
1つまたは複数の放射吸収剤と、
(a)酸発生剤;
(b)テトラアリールボレート;
(c)酸感受性染料前駆体;および
(d)以下の構造(I):
を有する化合物
からなる発色組成物と、
場合により、前記1つまたは複数のフリーラジカル重合性成分と異なるポリマー材料と
を含む放射感受性画像形成層と
を含み、
場合により、前記放射感受性画像形成層の上に配置された保護層を含む、平版印刷版原版。 - 平版印刷インク、湿し水、または平版印刷インクと湿し水の組み合わせを使用してオンプレス現像可能である、請求項8に記載の平版印刷版原版。
- 前記放射感受性画像形成層が2つ以上のフリーラジカル重合性成分を含む、請求項8に記載の平版印刷版原版。
- 前記放射感受性画像形成層が1つまたは複数のポリマーバインダーを含み、このポリマーバインダーの少なくとも1つが、少なくとも50nmおよび400nm以下の平均粒径を有する粒子として存在する、請求項8に記載の平版印刷版原版。
- 前記放射感受性画像形成層が赤外線感受性画像形成層であり、前記1つまたは複数の放射吸収剤が1つまたは複数の赤外線吸収剤である、請求項8に記載の平版印刷版原版。
- 前記少なくとも1つのR置換基のパラハメットσ値の合計が0より大きい、請求項8に記載の平版印刷版原版。
- 前記(a)酸発生剤がオニウム塩である、請求項8に記載の平版印刷版原版。
- 前記(a)酸発生剤および前記(b)テトラアリールボレートが、酸発生カチオンおよびテトラアリールボレートアニオンを含む1つの分子として前記発色組成物中に存在する、請求項8に記載の平版印刷版原版。
- 前記(a)酸発生剤がヨードニウムカチオンを含む、請求項8に記載の平版印刷版原版。
- 前記(d)構造(I)の化合物が、アルキル3,4−ジヒドロキシベンゾエート、アルキルガレート、4−クロロカテコール、4−ニトロカテコール、および3,4−ジヒドロキシベンゾニトリルからなる群から選択される、請求項8に記載の平版印刷版原版。
- 前記(b)テトラアリールボレートと前記(d)構造(I)の化合物のモル比が少なくとも0.25:1および3:1以下である、請求項8に記載の平版印刷版原版。
- 平版印刷版を形成する方法であって、
A)請求項8に記載の平版印刷版原版を放射で画像様露光して、前記放射感受性画像形成層に露光領域および非露光領域を得る工程と;
B)前記放射感受性画像形成層の前記非露光領域を除去する工程と
を含む方法。 - B)平版印刷インク、湿し水、または平版印刷インクと湿し水の組み合わせを使用して、オンプレスで前記放射感受性画像形成層の前記非露光領域を除去する工程
を含む、請求項19に記載の方法。 - 前記放射感受性画像形成層が赤外線吸収剤を含み、前記画像様露光が赤外線を使用して行われる、請求項19に記載の方法。
- 前記放射感受性画像形成層が1つまたは複数のポリマーバインダーを含み、このポリマーバインダーの少なくとも1つが、少なくとも50nmおよび400nm以下の平均粒径を有する粒子として存在する、請求項19に記載の方法。
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US16/137,676 US20200096865A1 (en) | 2018-09-21 | 2018-09-21 | Lithographic printing plate precursor and color-forming composition |
US16/137,676 | 2018-09-21 | ||
PCT/US2019/050149 WO2020060784A1 (en) | 2018-09-21 | 2019-09-09 | Lithographic printing plate precursor and color-forming composition |
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EP (1) | EP3853026B1 (ja) |
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US20210078350A1 (en) | 2019-09-17 | 2021-03-18 | Eastman Kodak Company | Lithographic printing plate precursor and method of use |
US11117412B2 (en) | 2019-10-01 | 2021-09-14 | Eastman Kodak Company | Lithographic printing plate precursors and method of use |
US11714354B2 (en) | 2020-03-25 | 2023-08-01 | Eastman Kodak Company | Lithographic printing plate precursor and method of use |
EP4169729A4 (en) * | 2020-06-17 | 2023-12-20 | FUJIFILM Corporation | ORIGINAL PLATE OF MACHINE DEVELOPMENT TYPE FLAT PLATE, METHOD FOR MANUFACTURING FLAT PLATE, AND METHOD OF FLAT PRINTING |
JPWO2022181724A1 (ja) * | 2021-02-26 | 2022-09-01 |
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CN112770910A (zh) | 2021-05-07 |
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