Invention Grant
- Patent Title: Positive working lithographic printing plate precursor and process for preparing lithographic printing plate
- Patent Title (中): 正性平版印刷版前体和制备平版印刷版的方法
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Application No.: US14357640Application Date: 2012-10-30
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Publication No.: US09250524B2Publication Date: 2016-02-02
- Inventor: Motohiro Tsushima , Yasuhiro Asawa
- Applicant: Eastman Kodak Company
- Applicant Address: US NY Rochester
- Assignee: EASTMAN KODAK COMPANY
- Current Assignee: EASTMAN KODAK COMPANY
- Current Assignee Address: US NY Rochester
- Agent J. Lanny Tucker
- Priority: JP2011-280339 20111221
- International Application: PCT/JP2012/078554 WO 20121030
- International Announcement: WO2013/094321 WO 20130627
- Main IPC: G03F7/00
- IPC: G03F7/00 ; G03F7/075 ; B41C1/10 ; G03F7/42
Abstract:
The present invention relates to a positive working lithographic printing plate precursor, comprising: (1) a substrate; and (2) an imaging layer, formed on the substrate, comprising a water-insoluble and an alkaline aqueous solution-soluble or dispersible resin and a photo-thermal converting material, wherein the imaging layer comprises either polyurethane or polyurethane urea or both of the polyurethane and the polyurethane urea, the polyurethane and the polyurethane urea comprising a unit having a substituent having an acidic hydrogen atom and a unit having a polysiloxane moiety in a side or main chain. The present invention can provide a lithographic printing plate precursor which has high printing durability, good scratch resistance, and good developing properties, as well as enhanced ink receptivity.
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