Modified polypropylene resin, foam made from the resin and...

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 255/02 (2006.01) C08F 287/00 (2006.01) C08J 9/00 (2006.01) C08J 9/04 (2006.01)

Patent

CA 2242611

A modified polypropylene resin is produced by melt-kneading a polypropylene resin, isoprene and a radical polymerization initiator. This resin exhibits such a high viscosity and a high tensile strength in melting that it causes little drawdown. Further, a foam produced by expanding the resin has a low density, a high closed-cell content, a beautiful appearance and an excellent heat resistance.

L'invention concerne une résine polypropylénique modifiée fabriquée par pétrissage sous fusion d'une résine propylénique, d'un isoprène et d'un initiateur de polymérisation radicalaire. La résine présente une viscosité et une résistance à la traction tellement élevées sous fusion que le phénomène de réduction de l'étirage est faible. On décrit aussi une mousse obtenue par expansion de cette résine et présentant les caractéristiques suivantes: faible densité, contenu alvéolaire élevé, très belle apparence et excellente résistance thermique.

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