POLYOLEFIN COMPOSITION CONTAINING COATED MICA PARTICLE TO BE MADE PROOF AGAINST YELLOWING AND METHOD THEREFOR

摘要

The compsn. comprises (a) a polyolefin; (b) an antioxidant; and (c) mica particles surface coated with a first layer of titanium dioxide followed by a second layer of a calcined coating of silica and alumina. Also claimed are (1) an antioxidant-contg. compsn. comprising (b) and (c); (2) a micaceous pigment for preventing yellowing in antioxidant-contg. polyolefin compsns., comprising (c); and (3) a process for preventing the yellowing of an antioxidant-contg. polyolefin compsn., comprising mixing the polyolefin with (c) and (b).