Multilayered elastomeric printing plate
First Claim
1. A multilayered article suitable for processing to form a flexographic printing plate comprising (A) a first layer comprising in admixture at least 40% of an elastomeric polymer, at least 5% of an addition polymerizable ethylenically unsaturated monomer and from 0.1 to 10% by weight of a photoinitiator activatable by actinic radiation and (B) a second elastomeric backing layer comprising the reaction product resulting from partially photocuring a vinyl terminated prepolymer having a molecular weight of from about 500 to about 10,000 in the presence of a photoinitiator activatable by actinic radiation, said reaction product having a hardness of about 30 to 90 Shore A.
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Abstract
This invention relates to a multilayered printing plate consisting of (1) a photosensitive printing layer comprising an elastomeric polymer, an ethylenically unsaturated monomer and a photoinitiator, (2) an elastomeric backing layer which is partially photocured and made from a vinyl terminated prepolymer containing a photoinitiator and (3) an optional supporting layer. The multilayer structure is useful for flexographic printing.
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Citations
24 Claims
- 1. A multilayered article suitable for processing to form a flexographic printing plate comprising (A) a first layer comprising in admixture at least 40% of an elastomeric polymer, at least 5% of an addition polymerizable ethylenically unsaturated monomer and from 0.1 to 10% by weight of a photoinitiator activatable by actinic radiation and (B) a second elastomeric backing layer comprising the reaction product resulting from partially photocuring a vinyl terminated prepolymer having a molecular weight of from about 500 to about 10,000 in the presence of a photoinitiator activatable by actinic radiation, said reaction product having a hardness of about 30 to 90 Shore A.
Specification