Flexographic printing plates and process for making the same

Details Flexographic printing plates and process for making the same Flexographic printing plates and process for making the same

1982-08-13

1985-05-14

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430306, 430918, G03C 172

Patent

active

045172781

ABSTRACT:
A photosensitive resin composition useful for preparation of flexographic printing plates, which comprises syndiotactic 1,2-polybutadiene, an ethylenically unsaturated monomer and a photo-polymerization initiator, the syndiotactic 1,2-polybutadiene having an average molecular weight of from about 10,000 to 300,000, a 1,2-unit content of at least about 80 percent and a crystallinity of about 10 to 30 percent, said ethylenically unsaturated monomer being an ester of acrylic or methacrylic acid with an alkanol having from 4 to 20 carbon atoms, and the photo-polymerization initiator being benzoin or an alkyl ether thereof. The photosensitive resin composition, when formed into sheets, exhibits satisfactory resistance to liquids used for washing out the uncured areas and at also to aqueous or alcoholic printing inks, thereby producing patterns in relief that give excellent overall sharpness. It also possesses desired hardness and elasticity for flexographic printing plates.

REFERENCES:
patent: 3615469 (1971-10-01), Ramp

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