Polyolefin composition containing ultrafine sorbitol and xylitol acetals

Abstract

A process for incorporating a clarifying agent into a semi-crystalline polyolefin resin is provided whereby a clarifying agent selected from compounds having the formula: ##STR1## wherein p is 0 or 1, m and n are independently 0-3, and R is, at each occurrence, independently selected from C.sub.1-8 alkyl, C.sub.1-4 alkoxy, hydroxy, halogen, C.sub.1-6 alkylthio, C.sub.1-6 alkylsulfoxy and a 4 or 5 membered alkyl group forming a carbocyclic ring with adjacent carbon atoms of the unsaturated parent ring, and wherein the clarifying agent is in the form of a powder characterized by a d.sub.97 of 30 microns or less, and a mean particle size of 15 microns or less, is blended with the polyolefin resin, at a temperature above 170.degree. C. until the clarifying agent is dissolved in the molten resin.

Dependencies are inferred from the claim text.