LITHOGRAPHIC PRINTING PLATE PRECURSORS AND PROCESSES FOR PREPARING LITHOGRAPHIC PRINTING PLATES
申请人:FUJIFILM Corporation
公开号:US20150044612A1
公开(公告)日:2015-02-12
Lithographic printing plates and processes for preparing the lithographic printing plates are provided. The plates have excellent printing durability, staining resistance and staining resistance over time. The lithographic printing plate precursor includes: a substrate; a photosensitive layer provided on the substrate; and an extra layer optionally provided between the substrate and the photosensitive layer. The photosensitive layer or the extra layer adjacent to the substrate contains (A) a copolymer. The copolymer (A) includes: (a1) a repeating unit of formula (a1-1) below in a side chain, and (a2) a repeating unit having at least one of the structures represented by formulae (a2-1) to (a2-6) shown in the specification in a side chain. L
1
, Z
1
, R
1
, and R
21
, R
22
and R
23
in formula (a1-1) and the variables in formulae (a2-1) to (a2-6) are as defined in the specification.
The invention is directed to a compound represented by the Formula (1) as defined herein, and a method for preparing a compound represented by the Formula (1) which includes: reacting a diamine compound represented by the Formula (2) as defined herein with a methacrylic anhydride or an acrylic anhydride under a condition where an organic acid having a pKa of 2.0 or more is present in an amount of 0.5 to 5.0 moles based on 1 mole of the diamine compound to obtain a reaction mixture; adding phosphoric acid to the reaction mixture; and purifying the reaction mixture by extraction with an organic solvent.