Abstract The light-sensitivity of polymeric compositions comprising azido groups is increased by intimately mixing them with sensitizing agents taken from imidazoles, oxazoles, oxadiazoles, thiazoles, polynuclear aromatic hydrocarbons and polynuclear quinones. The polymeric compositions may be composed of a mixture of a polymer comprising reactive groups with a compound or polymer containing at least two arylazide or sulphonyl azide groups. These aryl azide or sulphonyl azide groups may also be attached as substituents to the polymers containing reactive groups occasionally via a sensitizing group, or the polymer may be mixed with a compound wherein at least two azido groups are linked by means of a sensitizing group. Production of photographic printing plates and etching resists.
The light-sensitive polymeric composition of claim 1 wherein the polymer is a polyether of 2,2-bis(4-hydroxyphenyl)-propane and epichlorohydrin.
Claim 2
Dependent Claim
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The polymeric composition of claim 2 wherein the sensitizing nucleus is the moiety of 2,4,5-triphenyl imidazole, 2-styryl-5-phenyloxazole, 2-(p-dimethylaminophenyl)-benzoxazole, and bis(4-methyl-2-thiazolyl).
Claim 3
Dependent Claim
19 words
The polymeric composition of claim 2 wherein the sensitizing nucleus is the moiety of anthracene, 9-anthrol, and 9,10-phenanthrene quinone.
Claim 4
Dependent Claim
21 words
The light-sensitive polymeric composition of claim 1 wherein the azido groups are bound to the polymeric chain through the light-sensitive nucleus.