Photopolymerization of ethylenically unsaturated organic compounds

Claim 2

A process according to claim 1, wherein a light source is used emitting light in the wavelength range of 2500-5000 A., particularly 3000-5000 A.

Claim 3

A process according to claim 1, wherein a light source is used emitting light in the wavelength range of 2500-7000 A. and wherein a photooxidation sensitizer of the class consisting of acridine, phenazine, thiazine or xanthene dyes is present in the photopolymerisation composition in an amount between 0.001 and 0.1 percent by weight with respect to the ethylenically unsaturated organic compound present.

Claim 4

A process according to claim 1, wherein the photopolymerisation initiator is (phenylsulphonyl)-(p-tolyl)-diimide.

Claim 5

A process according to claim 1, wherein the photopolymerisation initiator is (p-acetamidophenyl-sulphonyl)-(p-tolyl)-diimide.

Claim 6

A process according to claim 1, wherein the photopolymerisation initiator is the sodium salt of (phenyl-sulphonyl)-(p-sulphophenyl)-diimide.

Claim 7

A process according to claim 1, wherein the photopolymerisation initiator is (p-tolylsulphonyl)-(p-acetamidophenyl)-diimide.

Claim 8

A process according to claim 1, wherein the photopolymerisation initiator is (m-carboxy-phenyl-sulphonyl)-(p-carboxyphenyl)-diimide.

Claim 9

A process of producing a polymeric photographic relief image, which comprises exposing to a pattern of actinic light radiation a photographic element comprising a support and a light-sensitive layer comprising a photopolymerisable ethylenically unsaturated organic compound and as a photopolymerisation initiator a compound containing at least one diazosulphone group, said compound corresponding to one of the formulae: X-SO2-N N-Y and X''-SO2-N N-Z-N N-SO2-X'' wherein: X represents phenyl, naphthyl, or phenyl substituted in ortho, meta or paraposition with respect to the sulphonyl group by alkyl of one to four carbon atoms, carboxyl, amino, dialkylamino wherein the alkyl groups comprise one to four carbon atoms, acylamino wherein the acyl group comprises two to seven carbon atoms, phenylazo or nitrophenylazo; X'' represents phenyl, aminophenyl or alkylphenyl wherein the alkyl group comprises one to four carbon atoms; Y represents pyridyl, anthraquinonyl, naphthyl, acridinyl, benzothiazolyl or a group of the formula

Claim 10

A process according to claim 10 wherein the pattern of actinic light radiation emits light in the wavelength of 2500-5000 A., particularly 3000-5000 A.

Claim 11

A process according to claim 10, wherein the pattern of actinic light radiation emits light in the wavelength of 2500-7000 A and wherein the light-sensitive layer also comprises a photooxidation sensitizer of the class consisting of acridine, phenazine, thiazine or xanthene dyes in an amount between 0.001 and 0.1 percent by weight with respect to the ethylenically unsaturated organic compound present.