Light-sensitive micropcapsule and light-sensitive material employing the same

Claim 2

A light-sensitive microcapsule having a core material which contains a silver halide and an ethylenically unsaturated polymerizable compound, said core material being enclosed in a shell comprising a melamine derivative-aldehyde resin produced from formaldehyde and a melamine compound containing a 2-5 functional melamine derivative of the following formula (I) or a melamine derivative of the following formula (II) in a amount of at least 10 wt.%: ##STR20## in which each of X 11 , Y 11 and Z 11 independently is a group selected from the group consisting of an amino group and a substituted amino group of --NHR 11 or --NR 12 R 13 wherein R 12 and R 13 which are the same or different from each other, represent a hydrogen atom an alkyl group, an alkoxy group, a phenyl group, a benzyl group, an alkoxycarbonyl group, an alkoxysulfonyl group, a glucoside group, a cyclic lactim group, a nitro group, a pyrrolyl group which is inert to an aldehyde; ##STR21## in which each of R 21 and R 22 is one atom or one group selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a cycloalkyl group and an aralkyl group, provided that one of R 21 and R 22 is a hydrogen atom; X 21 is --NR 23 R 24 or --OR 25 wherein each of R 23 , R 24 and R 25 has the same meaning as that for R 21 ; Y 21 is an organic linking group such that the number of atoms linking any two sets of the triazine rings is at least four; n is an integer of 2 to 4; and each of the above groups may have one or more substituents.

Claim 3

The light-sensitive microcapsule as claimed in claim 1, wherein said melamine derivative is a tetrafunctional guanamine.

Claim 4

The light-sensitive microcapsule as claimed in claim 1, where said melamine derivative has the formula (I) in which each of R 11 , R 12 and R 13 is a group selected from the group consisting of an alkyl group having 1-6 carbon atoms, phenyl, an alkoxy group, an alkoxycarbonyl group and an alkoxysulfonyl group.

Claim 5

The light-sensitive microcapsule as claimed in claim 1, wherein said melamine compound contains the melamine derivative of the formula (I) in an amount of at least 50 wt. %.

Claim 6

The light-sensitive microcapsule as claimed in claim 1, wherein said microcapsule has a composite shell having an inner shell of polyurea resin or polyurethane resin.

Claim 7

The light-sensitive microcapsule as claimed in claim 1, wherein said core material further contains a reducing agent.

Claim 8

The light-sensitive microcapsule as claimed in claim 1, wherein said melamine derivative has the formula (II) and said linking group of Y 21 contains at least two atoms selected from the group consisting of nitrogen, oxgen and sulfur, said atoms being attached to each of the triazine groups.

Claim 9

The light-sensitive microcapsule as claimed in claim 1, wherein said melamine derivative has the formula (II) in which X 21 is --NR 23 R 24 ; n is 2; and Y 21 is an organic linking group in which the number of atoms linking the two triazine rings is not more than 14.

Claim 10

The light-sensitive microcapsule as claimed in claim 1, wherein said melamine derivative has the formula (II) in which each of R 21 , R 22 , R 23 and R 24 is hydrogen.

Claim 11

The light-sensitive microcapsule as claimed in claim 1, wherein said melamine compound contains the melamine derivative of the formula (II) in an amount of at least 20 wt. %.

Claim 12

A light-sensitive material comprising a support and a light-sensitive layer provided thereon which contains a silver halide, a reducing agent and an ethylenically unsaturated polymerizable compound, at least said polymerizable compound being contained in a microcapsule, wherein said microcapsule has a shell comprising a melamine derivative-aldehyde resin produced from formaldehyde and a melamine compound containing a 2-5 functional melamine derivative of the following formula (I) or a melamine derivative of the following formula (II) in an amount of at least 10 wt. %: ##STR22## in which each of X 11 , Y 11 and Z 11 independently is a group selected from the group consisting of an amino group and a substituted amino group of --NHR 11 or --NR 12 R 13 wherein R 12 and R 13 which are the same or different from each other, represent a hydrogen atom, an alkyl group, an alkoxy group, a phenyl group, a benzyl group, and alkoxycarbonyl group, an alkoxysulfonyl group, a glucoside group, a cyclic lactim group, a nitro group, a pyrrolyl group or an idolyl group; each of R 11 , R 12 and R 13 is a group which is inert to aldehyde; ##STR23## in which each of R 21 and R 22 is one atom or one group selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a cycloalkyl group and an aralkyl group, provided that one of R 21 and R 22 is a hydrogen atom; X 21 is --NR 23 R 24 or --OR 25 wherein each of R 23 , R 24 and R 25 has the same meaning as that for R 21; Y 21 is an organic linking group such that the number of atoms linking any two sets of the triazine rings is at least four; n is an integer of 2 to 4; and each of the above groups may have one or more substituents.

Claim 13

A light-sensitive material comprising a support and a light-sensitive layer provided thereon which contains a silver halide, a reducing agent and an ethylenically unsaturated polymerizable compound, at least said polymerizable compound being contained in a microcapsule, wherein said microcapsule has a shell comprising a melamine derivative-aldehyde resin produced from formaldehyde and a melamine compound containing a 2-5 functional melamine derivative of the following formula (I) or a melamine derivative of the following formula (II) in an amount of at least 10 wt. %: ##STR22## in which each of X 11 , Y 11 and Z 11 independently is a group selected from the group consisting of an amino group and a substituted amino group of --NHR 11 or --NR 12 R 13 wherein R 12 and R 13 which are the same or different from each other, represent a hydrogen atom, an alkyl group, an alkoxy group, a phenyl group, a benzyl group, and alkoxycarbonyl group, an alkoxysulfonyl group, a glucoside group, a cyclic lactim group, a nitro group, a pyrrolyl group or an idolyl group; each of R 11 , R 12 and R 13 is a group which is inert to aldehyde; ##STR23## in which each of R 21 and R 22 is one atom or one group selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a cycloalkyl group and an aralkyl group, provided that one of R 21 and R 22 is a hydrogen atom; X 21 is --NR 23 R 24 or --OR 25 wherein each of R 23 , R 24 and R 25 has the same meaning as that for R 21; Y 21 is an organic linking group such that the number of atoms linking any two sets of the triazine rings is at least four; n is an integer of 2 to 4; and each of the above groups may have one or more substituents.

Claim 14

The light-sensitive material as claimed in claim 11, wherein said melamine derivative is a tetrafunctional guanamine.

Claim 15

The light-sensitive material as claimed in claim 11, wherein said melamine derivative has the formula (I) in which each of R 11 , R 12 and R 13 is a group selected from the group consisting of an alkyl group having 1-6 carbon atoms, phenyl, an alkoxy group, an alkoxycarbonyl group and an alkoxysulfonyl group.

Claim 16

The light-sensitive material as claimed in claim 11, wherein said melamine compound contains the melamine derivative of the formula (I) in an amount of at least 50 wt. %.

Claim 17

The light-sensitive material as claimed in claim 11, wherein said microcapsule has a composite shell having an inner shell of polyurea resin or polyurethane resin.

Claim 18

The light-sensitive material as claimed in claim 11, wherein said light-sensitive layer further contains a base precursor.

Claim 19

The light-sensitive material as claimed in claim 11, wherein said silver halide and reducing agent are contained in the microcapsule.

Claim 20

The light-sensitive material as claimed in claim 11, wherein said light-sensitive material is for a heat-developing process.

Claim 21

The light-sensitive material as claimed in claim 11, wherein said melamine derivative has the formula (II) and said linking group of Y 21 contains at least the atoms selected from the group consisting of nitrogen, oxygen and sulfur, said atoms being attached to each of the triazine groups.

Claim 22

The light-sensitive material as claimed in claim 11, wherein said melamine derivative has the formula (II) in which X 21 is --NR 23 R 24 ; n is 2; and Y 21 is an organic linking group in which the number of atoms linking the two triazine rings is not more than 14.

Claim 23

The light-sensitive material as claimed in claim 11, wherein said melamine derivative has the formula (II) in which each of R 21 , R 22 , R 23 and R 24 is hydrogen.

Claim 24

The light-sensitive material as claimed in claim 11, wherein said melamine compound contains the melamine derivative of the formula (II) in an amount of at least 20 wt. %.