Photosensitive composition, photosensitive planographic printing plate material, and recording method of planographic printing plate material

Abstract

An objective is to provide a photosensitive planographic printing plate material, a photosensitive composition for the photosensitive planographic printing plate material, and a method of recording the planographic printing plate material which are suitable for exposure employing laser light having an emission wavelength of 350-450 nm, and exhibit excellent resistance to chemicals and excellent linearity, together with an excellent safe light property. Also disclosed is a photosensitive composition comprising (A) an addition-polymerizable ethylenic double bond-containing compound that is represented by the following Formula (1), (B) a biimidazole compound that acts as a photopolymerization initiator, (C) a polymer binder, and (D) a dye exhibiting an absorption maximum wavelength of 350-450 nm.

Description

Claims

1. A photosensitive composition comprising: (A) an addition-polymerizable ethylenic double bond-containing compound that is represented by the following Formula (1);(B) a biimidazole compound that acts as a photopolymerization initiator;(C) a polymer binder; and(D) a dye exhibiting an absorption maximum wavelength of 350-450 nm. R(m-n)Q[(CH2C(R1)(R2)O)aCONH(X1NHCOO)bX2(OOCC(R3)═CH2)C]n  Formula (1)

2. The photosensitive composition of claim 1, further comprising a hydrogen-donating compound.

3. The photosensitive composition of claim 2, wherein the hydrogen-donating compound is a sulfur-containing compound.

4. A photosensitive planographic printing plate material comprising a support and provided thereon, a photosensitive layer comprising the photosensitive composition of claim 1.

5. A method of recording the photosensitive planographic printing plate material of claim 4, comprising the step of: exposing the photosensitive planographic printing plate material to laser light having an emission wavelength of 350-450 nm as a recording light source to record an image.