No drop films or plates consisting of acrylic polymers and process for their preparation

摘要

The invention concerns films or plates of acrylic polymers, in particular polymethylmethacrylate, rendered no drop by coating with a monomeric composition, polymerized and reticulated by ultraviolet light, consisting of: a) from 50 to 70% by weight of acrylates or methacrylates of C1-C12 alkyls, C4-C12 cycloalkyl, polycycloalkyl or alkylidene having from 7 to 14 C atoms; b) from 10 to 30% of acrylate or methacrylate of C2-C6 hydroxyalkyl; c) from 10 to 30% by weight of acrylic or methacrylic acid or their salts; d) from 1 to 10% by weight of a reticulation agent consisting of a polyfunctional acrylic monomer; e) from 0,01 to 3% by weight of hydrophilic colloidal metal oxides; f) from 0 to 0,06% by weight of a U.V. polymerization initiator, being 100 the sum of the a)+b)+c)+d)+e)+f) amounts.