Patent ID: 6503683
Filing Date: 2003-01-07
Classification: B41C,G03F

Abstract:
An aqueous screen printing composition consisting essentially of:(a) at least about 5 wt-% of an aqueous soluble or dispersible vinyl polymer comprising repeating units having a pendant nitrogen heterocycle in the form of an acid salt, said polymer is aqueous insoluble at an alkaline pH; (b) an effective image forming amount of a photosensitive composition which is aqueous soluble and photoreactive when exposed to an actinic source of energy, and (c) a vinyl polymer consisting essentially of repeating units derived from vinyl monomers selected from the group consisting of a mono olefin, a diene, a vinyl halide, a vinyl ether, a styrene, an acrylic acid, an acrylic acid eater, an acrylonitrile, an acrylamide, a vinyl ketone, a vinyl acid anhydride, and mixtures thereof.