Photosensitive elastomeric polymer composition for...

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G - Physics

03

F

96/172

G03F 7/033 (2006.01)

Patent

CA 1268985

ABSTRACT The present invention relates to a flexible photo- polymer printing plate composition comprising a homo- genous blend of: (A) a high molecular weight butadiene-acrylonitrile copolymer having a number average molecular weight of about 30,000 to 125,000, an acrylonitrile content of 10 to 50% by weight, a carboxyl content of 2 to 15% by weight, and a Mooney viscosity (ML-4 at 100°C) of 45 or higher; and (B) a medium molecular weight butadiene-acryloni- trile copolymer having a number average molecular weight of about 15,000 to 40,000, an acrylonitrile content of 10 to 40% by weight, a carboxyl content of 1-15%, and a Mooney viscosity (ML-4 at 100°C) of from 15 to less than 45.

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