UV-curing protective layer for thermoplastic substrates

摘要

The present invention relates to a multi-layer product, the first layer being a UV-cured protective layer which contains SiO2 nanoparticles, and the second layer containing a thermoplastic substrate. In addition, the invention relates to the composition of the UV-curable first layer, a process for the production of the multi-layer products and products, such as e.g. glazing products, which contain the named multi-layer products.

主权项

1. A multi-layer product comprising a first layer (S1) and a second layer (S2), the first layer being prepared from
A) 20 to 95 wt. % of one or more aliphatic polymer precursors selected from the group consisting of
A.1) aliphatic oligomers containing urethane bonds or ester bonds with at least two acrylate functions per molecule or mixtures of corresponding oligomers andA.2) aliphatic reactive diluents with at least two acrylate groups per molecule or mixtures of corresponding reactive diluents, B) 5 to 80 wt. % of one or more fine-particle inorganic compounds, C) 0.8 to 5 wt. % of at least one organic UV absorber which is a compound according to the following formula (IV) wherein X═OCH(R7)COOR8, wherein R7═CH3, and R8═C8H17, D) 0 to 10 wt. % of one or more radical scavengers of the hindered amine light stabilizer (HALS) class E) 0 to 5 wt. % of one or more flow control agents F) one or more solvents in an amount such that a solids content of 20 to 50 wt. % for the mixture of components A, B and F results of, and G) 1 to 5 wt. %, based on the amount of components A and B of one or more compounds selected from the group consisting of bis(2,4,6-trimethylbenzoyl)-phenyl phosphine oxide, 2,4,6-trimethylbenzoylethoxyphenyl phosphine oxide, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-1-propanone, and a mixture of bis(2,6-dimethoxy-benzoyl)(2,4,4-dimethylpentyl)phosphine oxide and (1-hydroxy-cyclohexyl)phenylmethanone wherein the amounts of components C, D and E are based on the weight of solids in the mixture of components A, B and F, the amount of components A and B total 100 wt, % and wherein the second layer comprises a thermoplastic polymer.