Screen emulsions comprised of diacetone acrylamide

Details Screen emulsions comprised of diacetone acrylamide Screen emulsions comprised of diacetone acrylamide

1986-11-05

1988-12-06

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430308, 430909, 1011284, 522109, 524459, 524503, G03C 170, C08F 216

Patent

active

047896213

ABSTRACT:
Screen emulsions in accordance with the present invention include a poly vinyl alcohol and poly vinyl acetate or a poly vinyl acetate copolymer emulsified in water along with appropriate amounts of diacetone acrylamide and an acrylic monomer. The emulsions preferably also include a cyclic amide, phthalate plasticizers, an initiator of monomer polymerization and a thermal stabilizer. The emulsions are intended to be admixed with a photosensitive free radical-generating compound that initiates cross-linking of the polymeric components and then applied to a mesh or screen. The screen is overlaid with an obliterating material, exposed to light and then washed to remove non-exposed emulsion. The resulting screen can be used without further hardening with both water- and solvent-based inks, and the film can be removed with emulsion-removing chemicals to permit reuse of the screen.

REFERENCES:
patent: 3100150 (1963-08-01), Chismar et al.
patent: 4118233 (1978-10-01), Tsunoda et al.
Martha Windholz, (ed), "7363. Polyvinyl Alcohol", The Merck Index, Ninth edition, Merck & Co., Inc., Rahway, N.J., U.S.A., 1976, p. 7362.

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