Initiator-free crosslinkable oligomers and polymers

摘要

Acrylate group-containing oligomers and polymers that produce hard, tack-free and crosslinked products in the presence of air under UV light free from added photoinitiator, obtainable by reacting monomeric, oligomeric or polymeric beta -ketoesters and beta -diketones with monomeric, oligomeric or polymeric acrylic acid esters, wherein a) the acrylic acid esters that are used are at least difunctional b) the reaction is carried out in the presence of 0.3-5.0 wt.% of catalyst c) the reaction temperature is 60 DEG -140 DEG C d) the reaction temperature is maintained until the viscosity of the acrylate group-containing oligomers and polymers that are formed is constant e) the ratio of acrylic acid groups to beta -dicarbonyl groups is 2.5:1 to 20:1. The acrylate group-containing oligomers and polymers are suitable for producing UV-hardenable coatings, printing inks, adhesives, sheets and moulding compositions.