Crystalline modification of mixtures of a nickel-quencher and a benzophenone andprocess for its preparation

摘要

Crystalline modification of mixtures comprising (a) a nickel-quencher corresponding to [2,2'-thio-bis(4-t-octylphenolate)-n-butylamine Nickel (II)] and (b) a 2-hydroxy-4-alkyloxybenzophenone corresponding to 2-hydroxy-4-n-octyloxybenzophenone wherein it has two diffraction lines at angles 2{acute over (ø=6.291 and 2{acute over (ø=6.888 in the X-Ray diffraction spectrum from powders. The said crystalline modification can be used as a light stabilizer for agricultural films based on polyolefins or polyolefinic copolymers.