Highly filled polymer compositions

Details Highly filled polymer compositions Highly filled polymer compositions

C - Chemistry, Metallurgy

08

L

C08L 23/08 (2006.01) C08K 3/00 (2006.01) C08L 23/00 (2006.01) C08L 23/04 (2006.01) C08L 23/10 (2006.01)

Patent

CA 2501572

This invention pertains to highly filled polymer compositions comprising a low molecular weight ethylene and/or alpha olefin homopolymers and copolymers, or blends therefrom, filled with high concentrations of fillers or additives. Examples of such fillers or additives include fire retardants, talc, ceramic manufacturing agents, color concentrates, crosslinking agents, and blowing agents. Because of the low crystallinity (and therefore high percentage of amorphous phase) and low viscosities of the base polymers, highly processable compositions can be formed containing even if containing relatively high loadings of fillers or additives. Such highly filled compositions are thus ideally suited as concentrates or masterbatch formulations for a variety of different compounding applications.

L'invention porte sur des compositions de polymères fortement chargées consistant en homopolymères et copolymères d'éthylène et/ou d'oléfines alpha, de faible poids moléculaire ou leurs mélanges à forte concentration de charges ou d'additifs, qui peuvent être par exemple des ignifuges, du talc, des agents de fabrication de céramiques, des concentrés de couleurs, des agents réticulants, et des agents d'expansion. En raison de leur faible cristallinité (et donc de leur fort pourcentage de phase amorphe) et de la faible viscosité des polymères de base, on peut obtenir des compositions très ouvrables, même si elles contiennent de fortes proportions de charges ou d'additifs. De telles compositions sont donc idéales comme concentrés ou mélanges-maîtres pour différentes applications de compoundage.

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