Photosensitive elastomeric polymer composition for flexographic printing plate
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United States of America Patent
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Aug 25, 1987
Issued Date -
N/A
app pub date -
May 29, 1986
filing date -
Jun 5, 1985
priority date (Note) -
Expired
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Abstract
The present invention relates to a flexible photopolymer printing plate composition comprising a homogenous 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.degree. C.) of 45 or higher; and (B) a medium molecular weight butadiene-acrylonitrile 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.degree. C.) of from 15 to less than 45.
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