Photosensitive composition and lithographic printing plate precursor
A photosensitive composition comprising: at least one photopolymerization initiator; an N-oxyamide compound represented by formula (1); and a compound of undergoing a reaction by an effect of at least one of a radical and an acid to irreversibly change in its physical or chemical property, wherein X, Y and Z each independently represents a monovalent substituent.
1 . A photosensitive composition comprising:
at least one photopolymerization initiator;
an N-oxyamide compound represented by formula (1); and
a compound of undergoing a reaction by an effect of at least one of a radical and an acid to irreversibly change in its physical or chemical property,
wherein X, Y and Z each independently represents a monovalent substituent.
2 . The photosensitive composition according to claim 1 , wherein the compound of undergoing a reaction by an effect of at least one of a radical and an acid is a compound having an ethylenically unsaturated double bond.
3 . The photosensitive composition according to claim 1 , wherein the compound represented by the formula (1) is represented by formula (2):
wherein X′, W and Z′ each independently represents a monovalent substituent, and n represents an integer of from 1 to 5.
4 . The photosensitive composition according to claim 1 , wherein the compound represented by the formula (1) is represented by formula (3):
wherein X″, W′ and Z″ each independently represents a monovalent substituent, and n represents an integer of from 1 to 5.
5 . The photosensitive composition according to claim 1 , wherein the compound represented by the formula (1) is represented by formula (4) or (5):
wherein W″, W′″, Z′″ and Z″″ each independently represents a monovalent substituent, and n represents an integer of from 1 to 5.
6 . The photosensitive composition according to claim 1 , further comprising a compound represented by the following formula:
7 . The photosensitive composition according to claim 1 , further comprising a compound represented by formula (XVIII):
wherein A represents an aromatic or heterocyclic ring which may have a substituent, X represents an oxygen atom, a sulfur atom or ═NR 7 , R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 each independently represents a hydrogen atom or a monovalent nonmetallic atomic group, provided that at least one of R 2 , R 3 , R 4 , R 5 and R 6 is a substituent represented by —OR 8 in which R 8 represents a monovalent nonmetallic atomic group, and n represents an integer of from 1 to 6.
8 . The photosensitive composition according to claim 1 , further comprising a binder polymer.
9 . The photosensitive composition according to claim 1 , further comprising a polyurethane having 10 weight % or more of an aromatic group.
10 . The photosensitive composition according to claim 1 , further comprising a sensitizing dye having absorption at a wavelength in a region of from 350 to 450 nm.
11 . A lithographic printing plate precursor comprising a photosensitive layer containing the photosensitive composition according to claim 1 .
12 . The lithographic printing plate precursor according to claim 11 , further comprising an overcoat layer.
13 . The lithographic printing plate precursor according to claim 11 , wherein an amount of the N-oxyamide compound contained in the photosensitive layer is from 0.01 to 40 parts by weight, per 100 parts by weight of components of the photosensitive layer.