| 摘要 |
Structured polyacrylates obtainable by crosslinking, induced by UV irradiation, of a polymer mixture comprising the following components:a) polyacrylate copolymers of the following monomersa1) acrylic acid and/or acrylic esters of the following formula where R1=H or CH3 and R2 is an alkyl chain having 1-20 carbon atoms, at 70-99% by weight, based on component (a),a2) olefinically unsaturated monomers containing functional groups, at 0-15% by weight, based on component (a),a3) tert-butyl acrylate, at 1-15% by weight, based on component (a), andb) a photocationic initiatorat 0.01-25% by weight, based on the overall polymer mixture, the structuring of the polyacrylates comprising the presence in the polyacrylates of regions of high crosslinking alongside regions of low crosslinking and/or noncrosslinked regions.
|
