Infrared sensitive composition and lithographic printing plate precursor
AssigneeFuji Photo Film Co., Ltd.
InventorsToshiaki Aoai, Akihiro Endo
Life of this patent
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Abstract
An infrared sensitive composition and a lithographic printing plate precursor having a large difference in alkali solubility between the exposed portions and unexposed portions (dissolution discrimination), an excellent latitude in development, and a high sensitivity can be provided when the composition is used for the image-forming layer of a lithographic printing plate precursor, which is an infrared sensitive composition comprising an alkali-soluble resin having a phenolic hydroxyl group (A), a light-heat converting substance (B) and a leucohydroxy dye (C).
Claims8
An infrared sensitive composition comprising:
- (A) an alkali-soluble resin having a phenolic hydroxyl group;
- (B) a light-heat converting substance;
- and
- (C) a leucohydroxy dye represented by the following general formula (I):
- wherein Ar1 and Ar2 each may be the same or different and represent an aryl group or a heteroaryl group, which may have a substituent group;
- R1 to R4 each may be the same or different and represent a hydrogen atom or an alkyl group which may have a substituent;
- Y represents a hydrogen atom, or an alkyl, aryl or heteroaryl groups which may have a substituent;
- when at least one of Ar1 and Ar2, or Y is an aryl group, at least one of Ar1, Ar2 and Y has as a substituent a hydroxy group, an amino group, a monoalkylamino group or a dialkylamino group at the ortho or para position;
- two of Ar1, Ar2 and Y may link together through a connecting group to form a ring;
- and m and n each represent 0 or 1.
A lithographic printing plate precursor comprising a support and an image-forming layer,
- wherein the image-forming layer comprises:
- (A) an alkali-soluble resin having a phenolic hydroxyl group;
- (B) a light-heat converting substance;
- and
- (C) a leucohydroxy dye represented by the following general formula (I):
- wherein Ar1 and Ar2 each may be the same or different and represent an aryl group or a heteroaryl group, which may have a substituent group;
- R1 to R4 each may be the same or different and represent a hydrogen atom or an alkyl group which may have a substituent;
- Y represents a hydrogen atom, or an alkyl, aryl or heteroaryl groups which may have a substituent;
- when at least one of Ar1 and Ar2, or Y is an aryl group, at least one of Ar1, Ar2 and Y has as a substituent a hydroxy group, an amino group, a monoalkylamino group or a dialkylamino group at the ortho or para position;
- two of Ar1, Ar2 and Y may link together through a connecting group to form a ring;
- and m and n each represent 0 or 1.
Dependencies are inferred from the claim text.