Claims
- 1. An image recording medium comprising an ultraviolet absorber precursor represented by formula (1-A) and an acid which is a polymer: wherein P represents a protecting group for a hydroxyl group which is capable of being deblocked by heating to 250° C. or less in the presence of an acid; R1 and R2, which may be the same or different, each represents a substitutable group; 1 and m each represents an integer of 0 to 4; and when 1 or m is 2 or more, a plurality of groups represented by R1 or R2, which may be the same or different, may combine together to form a ring.
- 2. The image recording medium according to claim 1, wherein P in formula (1-A) is a secondary or tertiary alkoxycarbonyl group having a hydrogen atom at the β-position.
- 3. An image recording medium comprising a compound having an alkoxycarbonyl group P represented by formula (1-B) which is removed from the compound upon the action of heat or an acid, wherein the compound causes a change in the absorption region of 360 to 900 nm upon the bond cleavage of the alkoxycarbonyl group P or upon a following reaction to the bond cleavage of the alkoxycarbonyl group P: wherein, in formula (1-B) Ar represents an aryl group and R1 and R2 each represents a substitutable group; and wherein said compound has a structure which can form a hydrogen bond within the molecule upon the cleavage of the alkoxycarbonyl group P represented by formula (1-B).
- 4. The image recording medium according to claim 3, wherein the compound is represented by formula (2-B):P—X—Y1—Y2—Y3—Z (2-B) wherein, in formula (2-B), P has the same meaning as in formula (1-B); X and Z each represents an oxygen atom or a nitrogen atom; when X or Z represents an nitrogen atom, the nitrogen atom may have a hydrogen atom or a substituent group if necessary; when Z represents an oxygen atom, the oxygen atom may have a hydrogen atom or a substituent group if necessary; Y1, Y2 and Y3 each represents a nitrogen atom or a carbon atom, which may have a hydrogen atom or a substituent group if necessary; X, Y1, Y2, Y3 and Z may combine to each other to form a ring; and the bonds of X—Y1, Y1—Y2, Y2—Y3 and Y3—Z each may form a double bond.
- 5. The image recording medium according to claim 3, which further comprises an acid.
- 6. The image recording medium according to claim 5, wherein said acid is a polymer.
- 7. The image recording medium according to claim 5, wherein the compound is separated from the acid by encapsulating the compound in a microcapsule.
- 8. The image recording medium according to claim 5, wherein the compound and the acid are each applied onto different layers adjacent to each other.
- 9. A method for recording an image comprising subjecting the image recording medium according to claim 3 to scanning exposure with a laser beam.
- 10. A method for recording an image comprising preheating the thermal recording medium according to claim 7 over the entire surface thereof at 120° C. or less, and subjecting it to scanning exposure with a laser beam.
- 11. A method for recording an image comprising preheating the thermal recording medium according to claim 8 over the entire surface thereof at 120° C. or less, and subjecting it to scanning exposure with a laser beam.
- 12. An image recording medium comprising an ultraviolet absorber precursor represented by formula (1-A) and an acid: wherein P represents a protecting group for a hydroxyl group which is capable of being deblocked by heating to 250° C. or less in the presence of an acid; R1 and R2, which may be the same or different, each represents a substitutable group; 1 and m each represents an integer of 0 to 4; and when 1 or m is 2 or more, a plurality of groups represented by R1 or R2, which may be the same or different, may combine together to form a ring; and wherein the ultraviolet absorber precursor represented by formula (1-A) is separated from the acid by encapsulating the ultraviolet absorber precursor represented by formula (1-A) in a microcapsule or the ultraviolet absorber precursor represented by formula (1-A) and the acid are each applied onto different layers adjacent to each other.
- 13. A method for recording an image comprising preheating the thermal recording medium according to claim 12 over the entire surface thereof at 120° C. or less, and subjecting it to scanning exposure with a laser beam.
- 14. A method for recording an image comprising subjecting an image recording medium to scanning exposure with a laser beam, wherein said medium comprises an ultraviolet absorber precursor represented by formula (1-A) and an acid: wherein P represents a protecting group for a hydroxyl group which is capable of being deblocked by heating to 250° C. or less in the presence of an acid; R1 and R2, which may be the same or different, each represents a substitutable group; 1 and m each represents an integer of 0 to 4; and when 1 or m is 2 or more, a plurality of groups represented by R1 or R2, which may be the same or different, may combine together to form a ring.
- 15. The image recording medium according to claim 1 wherein the protecting group is selected from the group consisting of an acyl group, a cyclopropylmethyl group, a primary alkoxycarbonyl group, a secondary alkoxycarbonyl group having a hydrogen atom at the β-position, a tertiary alkoxycarbonyl group having a hydrogen atom at the β-position, a silyl group, a secondary alkyl group having a hydrogen atom at the β-position and a tertiary alkyl group having a hydrogen atom at the β-position.
- 16. The image recording medium according to claim 12 wherein the protecting group is selected from the group consisting of an acyl group, a cyclopropylmethyl group, a primary alkoxycarbonyl group, a secondary alkoxycarbonyl group having a hydrogen atom at the β-position, a tertiary alkoxycarbonyl group having a hydrogen atom at the β-position, a silyl group, a secondary alkyl group having a hydrogen atom at the β-position and a tertiary alkyl group having a hydrogen atom at the β-position.
- 17. The method according to claim 14 wherein the protecting group in the image recording medium is selected from the group consisting of an acyl group, a cyclopropylmethyl group, a primary alkoxycarbonyl group, a secondary alkoxycarbonyl group having a hydrogen atom at the β-position, a tertiary alkoxycarbonyl group having a hydrogen atom at the β-position, a silyl group, a secondary alkyl group having a hydrogen atom at the β-position and a tertiary alkyl group having a hydrogen atom at the β-position.
- 18. The image recording medium according to claim 3 wherein Ar is selected from the group consisting of phenyl, naphthyl, furanyl, thienyl and pyridyl.
- 19. The image recording medium according to claim 18 wherein Ar has a substituent group at the substitutable position selected from the group consisting of a halogen atom, a nitro group, a cyano group, an alkyl group, an aryl group, an alkenyl group, an alkynyl group, an aralkyl group, a hetero ring residue, —N(R3)2, —NHCO R3, —NHCOOR3, —CONHR3, —COOR3, OR3 and —SR3, wherein R3 is selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, an alkenyl group, an alkynyl group, an aralkyl group and a hetero ring residue.
- 20. The image recording medium according to claim 1 wherein the protecting group is eliminated within the temperature range of 80° C. to 150° C. under acidic conditions.
Priority Claims (4)
Number |
Date |
Country |
Kind |
9-195897 |
Jul 1997 |
JP |
|
10-149816 |
May 1998 |
JP |
|
10-149817 |
May 1998 |
JP |
|
10-149818 |
May 1998 |
JP |
|
Parent Case Info
This application is a divisional of copending application Ser. No. 09/120,175, filed on Jul. 22, 1998, now U.S. Pat. No. 6,063,539, the entire contents of which are hereby incorporated by reference.
US Referenced Citations (7)