Lithographic printing plate surface protective agent and platemaking method for lithographic printing plate
申请人:Fujifilm Corporation
公开号:EP2042340A2
公开(公告)日:2009-04-01
A lithographic printing plate surface protective agent is provided, which exhibits an excellent capacity to prevent fingerprint scumming on a post-platemaking lithographic printing plate. This lithographic printing plate surface protective agent comprises at least one compound represented by the following general formula (I)
R-O-(CH2CH2O)n-H (I)
(in the formula, R is a C14 to C22 alkyl group and n is the average number of moles of addition of an ethylene oxide group and is 20 to 60).
2,5-Bisvinyl-1,4-benzoquinones 1 and 2-vinyl-1,4-benzoquinones 2 substituted with aryl or ester end groups have been synthesized. The 2,5-bisstyryl-1,4-benzoquinones 1 (R=phenyl, p-tolyl, o-tolyl) crystallize with a 7 Angstrom-stacking axis. But only for the o-tolyl derivative the contacts between the vinyl groups are close enough to allow a four-center type photopolymerization. The ester derivative 1 (R=COOEt) has a layer structure and can be photooligomerized in the crystal. The generated cyclobutane subgroups have twofold symmetry. The vinylquinones 2 (R=aryl) may be dimerized photochemically in the crystal at the vinyl groups to centrosymmetric cyclobutanes. Crystals with 4 Angstrom stacking axis are also photoreactive.
Reversible thermochromic composition
申请人:THE PILOT INK CO., LTD.
公开号:EP0659582B1
公开(公告)日:1998-05-13
LITHOGRAPHIC PRINTING PLATE SURFACE PROTECTIVE AGENT AND PLATEMAKING METHOD FOR LITHOGRAPHING PRINTING PLATE
申请人:SAKAMOTO Atsushi
公开号:US20090087791A1
公开(公告)日:2009-04-02
A lithographic printing plate surface protective agent is provided, which exhibits an excellent capacity to prevent fingerprint scumming on a post-platemaking lithographic printing plate. This lithographic printing plate surface protective agent comprises at least one compound represented by the following general formula (I)
R—O—(CH
2
C H
2
O)
n
—H (I)
(in the formula, R is a C
14
to C
22
alkyl group and n is the average number of moles of addition of an ethylene oxide group and is 20 to 60).