公开(公告)号：EP2366545A1

公开(公告)日：2011-09-21

申请号：EP10157030.7

申请日：2010-03-19

Applicant: Agfa Graphics N.V.

Inventor： Van Aert, Hubertus ,  Janssens, Heidi ,  Lingier, Stefaan

IPC: B41C1/10

CPC classification number: B41C1/1008 ,  B41C2210/02 ,  B41C2210/04 ,  B41C2210/06 ,  B41C2210/22 ,  B41C2210/24 ,  B41C2210/262

Abstract: A lithographic printing plate precursor comprising a support having a hydrophilic surface or which is provided with a hydrophilic layer, and a coating thereon, said coating comprising an IR absorbing agent and a polyvinylacetal binder, said polyvinylacetal comprising an acetal group having an acetal carbon atom substituted by a phenolic group, a naphtol group or an antracenol group, a second recurring unit comprising an acetal group having an acetal carbon atom substituted by an alkyl group having a hydrocarbon chain containing 1, 2 or 3 carbon atoms, and a third recurring unit comprising an acetal group having an acetal carbon atom substituted by an alkyl group having a hydrocarbon chain containing 1, 2 or 3 carbon atoms wherein the alkyl group of the acetal group of the third recurring unit is different from the alkyl group of the acetal group of the second recurring unit.
The precursor exhibits an improved sensitivity on exposure and the stability against daylight exposure is further improved.

Abstract translation: 一种平版印刷版前体，其包括具有亲水性表面的或具有亲水层的载体及其上的涂层，所述涂层包含IR吸收剂和聚乙烯醇缩乙醛粘合剂，所述聚乙烯醇缩醛包括具有缩醛碳原子取代的缩醛基 通过酚基，萘酚基或antacacolol基，第二重复单元包括具有由具有1,2或3个碳原子的烃链的烷基取代的缩醛碳原子的缩醛基和第三重复单元，其包含 具有被具有碳原子数为2或3的烃链的烷基取代的缩醛碳原子的缩醛基，其中第三重复单元的缩醛基的烷基不同于第二重复单元的缩醛基的烷基 第二个重复单位。 该前体对曝光具有改善的敏感性，并且进一步提高了对日光暴露的稳定性。

公开(公告)号：EP2366545B1

公开(公告)日：2012-12-05

申请号：EP10157030.7

申请日：2010-03-19

Applicant: Agfa Graphics N.V.

Inventor： Van Aert, Hubertus ,  Janssens, Heidi ,  Lingier, Stefaan

IPC: B41C1/10

CPC classification number: B41C1/1008 ,  B41C2210/02 ,  B41C2210/04 ,  B41C2210/06 ,  B41C2210/22 ,  B41C2210/24 ,  B41C2210/262

公开(公告)号：EP2159049B1

公开(公告)日：2012-04-04

申请号：EP08105202.9

申请日：2008-09-02

Applicant: Agfa Graphics N.V.

Inventor： Loccufier, Johan ,  Lingier, Stefaan ,  Janssens, Heidi

IPC: B41C1/10

CPC classification number: B41C1/1016 ,  B41C2201/04 ,  B41C2210/02 ,  B41C2210/06 ,  B41C2210/14 ,  B41C2210/22 ,  B41C2210/24 ,  B41C2210/262

公开(公告)号：EP2159049A1

公开(公告)日：2010-03-03

申请号：EP08105202.9

申请日：2008-09-02

Applicant: Agfa Graphics N.V.

Inventor： Loccufier, Johan ,  Lingier, Stefaan ,  Janssens, Heidi

IPC: B41C1/10

CPC classification number: B41C1/1016 ,  B41C2201/04 ,  B41C2210/02 ,  B41C2210/06 ,  B41C2210/14 ,  B41C2210/22 ,  B41C2210/24 ,  B41C2210/262

Abstract: A heat-sensitive positive-working lithographic printing plate precursor comprising
(1) a support having a hydrophilic surface or which is provided with a hydrophilic layer,
(2) a heat-sensitive coating, comprising
- an underlayer on said support and thereon an upperlayer,
- an IR absorbing agent in at least one of said underlayer and upperlayer,
- a phenolic resin in said upperlayer, and
- a first polymer in said underlayer,

characterised in that said first polymer is an alkaline soluble polymer comprising a first sulfonamide containing monomeric unit having a specified structure according to formula I or formula II and a second amide containing monomeric unit having a specified structure according to formula III.
The printing plates show an improved chemical resistance of the coating and a reduced undercutting of the image forming parts of the coating.

Abstract translation: 一种热敏正性平版印刷版原版，其包括（1）具有亲水性表面的或具有亲水层的载体，（2）热敏涂层，其包含：在所述载体上的底层，其上层 ， - 在所述底层和上层中的至少一个中的IR吸收剂， - 所述上层中的酚醛树脂，和 - 所述底层中的第一聚合物，其特征在于，所述第一聚合物是包含含有单体的第一种磺酰胺的碱溶性聚合物 具有根据式I或式II的具体结构的单元和含有根据式III具有特定结构的第二酰胺含单体单元。 印版显示出涂层的耐化学性改善和涂层成像部分的底切减少。