公开(公告)号：US5922512A

公开(公告)日：1999-07-13

申请号：US119576

申请日：1998-07-20

Applicant: Thap DoMinh

Inventor： Thap DoMinh

IPC: G03F7/029 ,  B41C1/055 ,  B41C1/10 ,  B41M5/36 ,  B41M5/40 ,  B41M5/46 ,  B41N1/14 ,  G03F7/00 ,  G03F7/26 ,  G03F7/032

CPC classification number: B41C1/1041 ,  B41M5/368 ,  B41M5/465

Abstract: An imaging member, such as a negative-working printing plate, can be prepared using a heat sensitive imaging layer comprised of a heat-sensitive vinyl polymer and optionally a photothermal conversion material. The heat-sensitive polymer has recurring units containing a cyclic anhydride that decarboxylates upon application of thermal energy (such as from IR irradiation), rendering the polymer more hydrophobic in IR exposed areas. Upon contact with a neutral or acidic pH solution, the polymer is then rendered more hydrophilic in unexposed areas.

Abstract translation: 可以使用由热敏乙烯基聚合物和任选的光热转换材料组成的热敏成像层来制备成像构件，例如负性印刷版。 热敏聚合物具有含有在施加热能（例如来自IR照射）时脱羧的环状酸酐的重复单元，使得聚合物在IR暴露区域中更具疏水性。 当与中性或酸性pH溶液接触时，聚合物在未曝光区域中变得更亲水。

公开(公告)号：US5914217A

公开(公告)日：1999-06-22

申请号：US162944

申请日：1998-09-29

Applicant: Gary Roger Miller ,  Melanie Ann Felker

Inventor： Gary Roger Miller ,  Melanie Ann Felker

IPC: G03F7/32 ,  G03C7/32

CPC classification number: G03F7/322

Abstract: An alkaline developing composition for processing a lithographic printing plate includes an alkali metal silicate and at least 6 weight % of a thickener such as glycerine. The lithographic printing plate can be either positive- or negative-working, and includes negative-working thermal plates.

Abstract translation: 用于加工平版印刷版的碱性显影组合物包括碱金属硅酸盐和至少6重量％的增稠剂如甘油。 平版印刷版可以是正面或负面的，并且包括负极工作的热敏板。

公开(公告)号：US5900345A

公开(公告)日：1999-05-04

申请号：US944303

申请日：1997-10-06

Applicant: Stephan J. W. Platzer ,  Joe E. South ,  Melinda A. Alden

Inventor： Stephan J. W. Platzer ,  Joe E. South ,  Melinda A. Alden

IPC: B41N3/03 ,  G03F7/004 ,  G03C1/93 ,  G03F7/021

CPC classification number: B41N3/038 ,  G03F7/0048

Abstract: Improved aluminum substrates suitable for use in the production of lithographic printing plates. A surfactant surface treatment for such aluminum substrates improves the quality of radiation sensitive coatings subsequently applied to the substrate. The surfactant may be in a layer comprising a mixture of a hydrophilizing composition and a surfactant on the aluminum alloy surface; or a hydrophilizing layer comprising a hydrophilizing composition may be on the aluminum alloy surface and a surfactant layer comprising a surfactant on the hydrophilizing layer.

Abstract translation: 改进的铝基板适用于平版印刷版的生产。 用于这种铝基材的表面活性剂表面处理改善了随后施加到基材上的辐射敏感涂层的质量。 表面活性剂可以是在铝合金表面上包含亲水组合物和表面活性剂的混合物的层; 或者包含亲水化组合物的亲水化层可以在铝合金表面上，以及在亲水层上含有表面活性剂的表面活性剂层。

公开(公告)号：US5811221A

公开(公告)日：1998-09-22

申请号：US865795

申请日：1997-05-30

Applicant: Gary R. Miller ,  Melanie A. Felker

Inventor： Gary R. Miller ,  Melanie A. Felker

IPC: G03F7/00 ,  G03F7/32 ,  G03F7/30

CPC classification number: G03F7/322

Abstract: An alkaline developing composition for processing a lithographic printing plate includes an alkali metal silicate, at least 6 weight % of a thickener such as glycerine, and a nonionic fluorosurfactant or a phosphate ester hydrotrope. Lithographic printing plates that can be developed using this composition are either positive- or negative-working, and include both positive- and negative-working thermal plates.