Masterbatches having high levels of resin, in particular for...

C - Chemistry – Metallurgy – 08 – J

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C08J 3/22 (2006.01) C08J 3/00 (2006.01) C08L 23/02 (2006.01) C08L 23/04 (2006.01) C08L 23/10 (2006.01) C08L 23/24 (2006.01)

Patent

CA 2365184

Masterbatch including at least about 65 wt.% of resin having a R & B softening point as measured in accordance with ASTM 28-67. The masterbatch also includes a carrier polymer having a peak melting temperature, as measured by DSC, up to about 20 ~C greater than the R & B softening point of the resin. A masterbatch pellet made by a method, including mixing a resin having a R & B softening point as measured in accordance with ASTM 28-67, and a carrier polymer having a peak melting temperature, as measured by DSC, up to about 20 ~C greater than the R & B softening point of the resin, to form masterbatch composition including at least about 65 wt.% of resin. The method of making the masterbatch pellet also includes pelletizing the masterbatch composition into masterbatch pellet. Methods of making a masterbatch, methods for making polymer product, and a polymer product.

L'invention porte sur un mélange maître comprenant au moins environ 65 % en poids de résine ayant un point de ramollissement R & B mesuré conformément à ASTM 28-67. Ce mélange maître comprend également un polymère support ayant un pic de température de fusion mesuré par CDB (calorimétrie dynamique à balayage) et pouvant atteindre jusqu'à environ 20 ·C de plus que le point de ramollissement R & B de la résine. Selon ce procédé, on obtient une pastille du mélange maître en mélangeant une résine ayant un point de ramollissement R & B mesuré conformément à ASTM 28-67 avec un support polymère ayant un pic de température de fusion mesuré par CDB pouvant atteindre jusqu'à 20 ·C de plus que le point de ramollissement R & B de la résine de façon à former une composition de mélange maître comprenant au moins environ 65 % de résine. Le procédé consiste également à mettre en pastilles la composition du mélange maître. L'invention porte également sur des procédés de fabrication d'un mélange maître, d'un produit polymère et sur le produit polymère lui-même.

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