Developer solvent for photopolymer printing plates and method

Details Developer solvent for photopolymer printing plates and method Developer solvent for photopolymer printing plates and method

G - Physics

03

F

G03F 7/26 (2006.01) G03C 5/18 (2006.01) G03F 7/30 (2006.01) G03F 7/32 (2006.01)

Patent

CA 2318958

Flexographic printing plates crosslinkable by photopolymerization are produced by exposing the plates to a light source and washing out (developing) with a solvent the non-crosslinked areas that are masked out during the exposure process. The invention provides terpene ester-based solvents suitable for use in the development of photopolymer printing plates. The solvents, which include terpene esters alone or terpene esters mixed with organic solvents and/or non-solvents, are effective in developing a large number of different photopolymer printing plates and can produce images superior to those obtained with commercially available solvents currently used in such applications.

Selon cette invention, on fabrique des clichés d'impression flexographiques, réticulables par photopolymérisation, en exposant ces clichés à une source lumineuse et en rinçant (en développant) avec un solvant les parties non réticulées qui sont masquées lors du processus d'exposition. L'invention concerne des solvants à base d'esters terpéniques qui conviennent au développement de clichés d'impression photopolymères. Les solvants, qui comprennent des esters terpéniques pris séparément ou mélangés à des solvants et/ou à des non-solvants organiques, se montrent efficaces lors du développement d'une grande quantité de différents clichés d'impression photopolymères et permettent de produire des images meilleures que celles obtenues avec des solvants disponibles dans le commerce et actuellement utilisés pour ce type d'applications.

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