COLOURED POLYPROPYLENE COMPOSITIONS

摘要

The present invention concerns coloured polymer compositions and a process for the preparation thereof. The present composition comprises a propylene polymer nucleated with a polymeric nucleating agent containing vinyl compound units and having an at least 7 ~C higher crystallization temperature than that of the corresponding non-nucleated polymer, and a colour pigment having a nucleating effect on the propylene polymer. The shrinkage of the composition varies less than 5 % for different colour pigments.