Photosensitive plates with diazonium composition layer and polyurethane photopolymer with unsaturation in side chain overlayer
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United States of America Patent
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Aug 26, 1986
Grant Date -
N/A
app pub date -
Nov 16, 1984
filing date -
Nov 16, 1984
priority date (Note) -
Expired
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Abstract
Photopolymeric polyurethanes are provided which have a polymeric backbone including recurring urethane or urea groups or both and which have unsaturated hydrocarbon groups attached to this backbone. These photopolymers are combined with a solvent and have a selected and controlled molecular weight and viscosity. The photopolymeric polyurethane solutions are especially useful in providing plates that have a layer including a photopolymer, particularly plates for printing or photoresists that have a photopolymeric layer over a layer of light sensitive diazonium composition.
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