Michael D Short

US Patent:

44156499, Nov 15, 1983

Filed:

Jun 3, 1982

Appl. No.:

6/384558

Inventors:

Stanley H. Munger - Rumson NJ
Michael R. Short - Freehold NJ
David W. Swatton - East Keansburg NJ

Assignee:

E. I. Du Pont de Nemours & Co. - Wilmington DE

International Classification:

G03C 178

US Classification:

430271

Abstract:

Photosensitive flexographic element comprising (A) a flexible support, (B) a photosensitive elastomeric layer comprising (a) butadiene/acrylonitrile copolymer having a no. average molecular weight of 20,000 to 75,000 and optionally up to 15% by weight carboxyl content, (b) ethylenically unsaturated monomer and (c) free radical generating system, and between (A) and (B) an adhesive blend of at least two of the following polymers (1) polyester resin, condensation polymer of ethylene glycol, terephthalic acid, isophthalic acid and azelaic acid, 0 to 78% by weight; (2) polyether polyurethane resin having a Brookfield viscosity of 100-1200, 0 to 78% by weight; (3) a polyamide as defined, 0 to 94% by weight; and (4) a polyamide as defined, 0 to 97% by weight, the weight percentages based on the total weight of resin in the adhesive composition. The element is particularly useful for the preparation of flexographic printing plates processed in aqueous or semiaqueous basic solutions.