Photosensitive composition and novel compound used therefor
View Patent ↗A photosensitive composition containing: a sensitizing dye represented by the formula (1) as defined herein; an initiator compound capable of generating a radical, an acid, or a base; and a compound whose physical or chemical characteristic irreversibly changes by at least one of a radical, an acid, and a base.
1. A photosensitive composition containing:
(A) a sensitizing dye represented by the following formula (2):
wherein A represents an optionally substituted aromatic or heterocyclic ring; X represents an oxygen atom; R 4 and R 5 each independently represents a hydrogen atom or a monovalent non-metallic atomic group; R 6 represents a substituted aryl group, wherein the substituent group in the substituted aryl group is selected from the group consisting of an ester group and a cyano group, and wherein the sum of the Hammett's values on the substituent group(s) of the substituted aryl group is greater than 0; and A and R 4 , R 5 or R 6 may be bonded to each other to form an aliphatic or aromatic ring;
(B) an initiator compound capable of generating a radical, an acid, or a base; and
(C) a compound whose physical or chemical characteristic irreversibly changes by at least one of a radical, an acid, and a base,
wherein the initiator compound (B) is a hexaaryl biimidazole.
2. The photosensitive composition according to claim 1 , further containing (D) a binder polymer.
3. The photosensitive composition according to claim 1 , further containing (E-1) a cosensitizer.
4. The photosensitive composition of claim 1 , wherein the substituent group in the substituted aryl group is present at an ortho position on the substituted aryl group skeleton.
5. A lithographic printing plate precursor comprising a photosensitive layer containing the photosensitive composition according to claim 1 .
6. A compound represented by the following formula (2):
wherein A represents an optionally substituted aromatic or heterocyclic ring; X represents an oxygen atom; R 4 and R 5 each independently represents a hydrogen atom or a monovalent non-metallic atomic group; R 6 represents a substituted aryl group, wherein the substituent group in the substituted aryl group is selected from the group consisting of an ester group and a cyano group, and wherein the sum of the Hammett's values on the substituent group(s) of the substituted aryl group is greater than 0; and A and R 4 , R 5 or R 6 may be bonded to each other to form an aliphatic or aromatic ring.
7. A photosensitive composition containing:
(A-1) a sensitizing dye represented by the following formula (3):
wherein A represents an optionally substituted aromatic or heterocyclic ring; X represents an oxygen atom, a sulfur atom, or —N(R 1 )—; R 1 , R 4 and R 5 each independently represents a hydrogen atom or a monovalent non-metallic atomic group; A and R 1 , R 4 or R 5 may be bonded to each other to form an aliphatic or aromatic ring; and Ar represents an aromatic ring or heterocyclic ring having at least one substituent group selected from the group consisting of an ester group and a cyano group, provided that the sum of the Hammett's values of the substituent group(s) on the Ar skeleton is greater than 0;
(B-1) a hexaaryl biimidazole; and
(C-1) an addition polymerizable compound capable of being reacted by at least one of a radical, an acid and a base.
8. The photosensitive composition according to claim 7 , further containing (D) a binder polymer.
9. The photosensitive composition according to claim 7 , further containing (E-1) a cosensitizer.
10. A photosensitive composition containing:
(A) a sensitizing dye represented by the following formula (2):
wherein A represents an optionally substituted aromatic or heterocyclic ring: X represents an oxygen atom; R 4 and R 5 each independently represents a hydrogen atom or a monovalent non-metallic atomic group; R 6 represents a substituted aryl group, wherein the substituent group in the substituted aryl group is selected from the group consisting of an ester group and a cyano group, and wherein the sum of the Hammett's values on the substituent group(s) of the substituted aryl group is greater than 0; and A and R 4 , R 5 or may be bonded to each other to form an aliphatic or aromatic ring;
(B) an initiator compound capable of generating a radical, an acid, or a base; and
(C) a compound whose physical or chemical characteristics irreversibly change by at least one of a radical, an acid, and a base,
wherein the initiator compound (B) is