Claims
- 1. A light-sensitive and pressure-sensitive recording material comprising (i) an addition polymerizable compound having at least one ethylenic unsaturated double bond, (ii) a photopolymerization initiator composition and (iii) at least one component capable of causing a color reaction, wherein components (i), (ii) and (iii) are contained in microcapsules which cause color development upon rupturing the microcapsules in non-exposed areas, rupturing being effected by the application of pressure to the microcapsules and being after image-wise exposure of the microcapsules to light; and wherein said photopolymerization initiator composition (ii) comprises the following components (a), (b) and (c):
- (a) a photo-absorbent having a molecular extinction coefficient of 10.sup.3 or more at a maximum absorption wavelength;
- (b) a hexaarly-biimidazole; and
- (c) a heterocyclic mercapto compound selected from compounds represented by the following formula (II) and (III): ##STR7## wherein R.sub.1 is an alkyl group, an alkylthio group or a mercapto group; ##STR8## wherein R.sub.2 is a hydrogen atom or an alkyl group; R.sub.3 is an alkyl group or an aryl group, wherein the content of component (a) is 0.1 to 10 parts by weight, that of component (b) is 0.5 to 30 parts by weight, and that of component (c) is 0.1 to 20 parts by weight, each on the basis of 100 parts by weight of said ethylenic unsaturated bond-containing compound (i), and wherein component (iii) is employed in an amount of from 0.5 to 20 parts by weight on the basis of 100 parts by weight so component (i) wherein the microcapsules have a capsule wall which is formed from urea, resorcinol and formaldehyde.
- 2. The recording material as claimed in claim 1, wherein said photo-absorbent (a) has a maximum absorption within a wavelength range of about 300 to 600 nm and has a molecular extinction coefficient of 10.sup.3 or more at said maximum absorption wavelength.
- 3. The recording material as claimed in claim 2, wherein said photo-absorbent (a) is selected from dialkylaminobenzophenones, substituted coumarins, substituted thioxanthones and merocyanine dyes.
- 4. The recording material as claimed in claim 1, wherein said hexaaryl-biimidazole (b) contains phenyl and/or substituted phenyl groups as the aryl groups.
- 5. The recording material as claimed in claim 4, wherein said hexaaryl-biimidazole (b) is selected from 2,2'-bis(o-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(o-methoxyphenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(o-chlorophenyl)-4,4',5,5'-tetra(m-methoxyphenyl)biimidazole and 2,2'-bis(o-methylphenyl)-4,4',5,5'-tetraphenylbiimidazole.
- 6. The recording material as claimed in claim 1, wherein the content of component (a) is 1 to 5 parts by weight, that of component (b) is 2 to 20 parts by weight and that of component (c) is 1 to 15 parts by weight, each on the basis of 100 parts by weight of said ethylenic unsaturated bond-containing compound (i).
- 7. The recording material as claimed in claim 1, wherein component (iii) is employed in an amount of from 2 to 7 parts by weight on the basis of 100 parts by weight of component (i).
- 8. The recording material as claimed in claim 1, wherein said heterocylic mercapto compound is selected from the group consisting of ##STR9##
Priority Claims (1)
Number |
Date |
Country |
Kind |
59-121638 |
Jun 1984 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 744,176, filed June 13, 1986, now abandoned.
US Referenced Citations (7)
Continuations (1)
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Number |
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744176 |
Jun 1986 |
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