Foamable polypropylene polymers and their use

Details Foamable polypropylene polymers and their use Foamable polypropylene polymers and their use

C - Chemistry, Metallurgy

08

J

C08J 9/00 (2006.01) C08F 10/00 (2006.01) C08F 110/06 (2006.01) C08L 23/12 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)

Patent

CA 2389812

This invention relates generally to foamable polypropylene polymer, and more particularly to a foamable isotactic polypropylene homopolymer obtained from metallocene catalysis and to their methods of production and articles formed therefrom. The foamable polypropylene polymer has molecular weight distributions and densities that fall within broad ranges. The foamable polypropylene polymer may be prepared in a multiple stage polymerization process using the same metallocene component in at least two stages.

L'invention concerne en général un polymère de polypropylène expansible, et notamment un homopolymère de polypropylène isotactique expansible, obtenu à partir d'une catalyse à base de métallocène; elle concerne également des procédés de production de ces substances ainsi que des articles formés à partir de celles-ci. Ce polymère de polypropylène expansible comprend des répartitions et densités de poids moléculaires se situant dans des gammes étendues. On peut préparer le polymère de polypropylène expansible selon un procédé de polymérisation en plusieurs étapes, à l'aide du même composant métallocène présent au moins dans deux étapes.

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