C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 23/10 (2006.01) C08J 3/20 (2006.01) C08K 5/00 (2006.01)
Patent
CA 2310581
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.
La présente invention concerne des compositions de polypropylène colorées ainsi qu'un procédé permettant de préparer ces dernières. La présente composition comprend un polymère de propylène nucléé avec un agent de nucléation polymère renfermant des motifs de composés vinyliques et ayant une température de cristallisation au moins supérieure de 7 DEG C à celle du polymère correspondant non nucléé, et un pigment coloré ayant un effet de nucléation sur le polymère de propylène. Le retrait de la composition varie de moins de 5 % suivant les différents pigments colorés.
Crozier Herve
Folland Rick
Borealis A/s
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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