Patent ID: 8410206
Filing Date: 2013-04-02
Classification: C08K

Abstract:
1. A method for stabilizing light-sensitive organic polymers against degradation by free radicals that are generated by photochemical, thermal, physical and/or chemical induction or by exposure of the polymers to UV light, where the polymers that are to be stabilized are components of a lacquer, a varnish, or a coating compound, and where the method includes the step of adding at least one inorganic radical trap to the polymers in combination with at least one UV-absorber or at least one additional radical trap, where the weight ratio of cerium dioxide to the at least one UV-absorber or the at least adding at least one inorganic radical trap to the polymers in combination with at least one UV-absorber or at least one additional radical trap, where the at least one inorganic radical trap includes cerium dioxide (CeO the weight ratio of cerium dioxide to the at least one UV-absorber or the at least one additional radical trap, with respect to the combination of cerium dioxide and the at least one UV-absorber or the at least one additional radical trap, is in the range from 1:99 to 20:80; and where the combination of cerium dioxide and the at least one UV-absorber or the at least one additional radical trap is used in an amount of from 0.5 to 15 wt % with respect to the polymers that are to be stabilized, said amount being effective to stabilize the light-sensitive organic polymers against degradation by said free radicals.