Surface coated calcium carbonate for polyolefins

摘要

The present invention relates to a polymer composition comprising a polypropylene and a beta-nucleating agent, wherein the beta-nucleating agent comprises
(a) a particulate natural mineral solid support, comprising a compound of a IUPAC Group 2 metal, and
(b) on the surface of the particulate mineral solid support
(b1) a salt of a dicarboxylic acid, wherein the dicarboxylic acid has from 7 to 10 carbon atoms, and
(b2) a dispersing and/or grinding agent.