Photopolymerizable transfer material
AssigneeHoechst Aktiengesellschaft
InventorsKurt Klupfel, Heide Sprengel
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Abstract
This invention relates to an improvement in a photopolymerizable transfer material comprising a flexible base, and a thermoplastic photopolymerizable copying layer, the improvement comprising including an adhesion-imparting substance at the boundary of said copying layer away from said base, said substance having the formula ##STR1## in which n is 0 or an integer from 1 to 3, R.sub.1 is H or OH, R.sub.2 is H or COOR.sub.3, and R.sub.3 is an alkyl group having about 1 or 25 carbon atoms.
Claims13
In a photopolymerizable transfer material comprising a flexible base, and a thermoplastic photopolymerizable copying layer, said layer comprising
- (a) a thermoplastic polymeric binder,
- (b) a photopolymerizable acrylic or methacrylic ester which boils at a temperature of at least 100.degree. C. and which contains at least one terminal, ethylenically unsaturated group, and
- (c) a photoinitiator activatable by actinic radiation, weight, based on the weight of the non-volatile components of the layer, of an adhesion-imparting substance effective to improve adhesion to copper or copper-alloys evenly distributed in the photopolymerizable copying layer and/or havng said adhesion-imparting substance in a separate, homogeneous, coherent layer on top of said copying layer on the opposite side of said flexible base, said adhesion-imparting substance having the formula ##STR4## in which n is 0 or an integer from 1 to 3,
- R.sub.1 is H or OH,
- R.sub.2 is H or COOR.sub.3, and R.sub.3 is an alkyl group having from 1 to 25 carbon atoms.
Dependencies are inferred from the claim text.