Crosslinked polyethylene articles and processes to produce same

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/04 (2006.01) C08L 23/18 (2006.01)

Patent

CA 2686762

A high strength, flexible crosslinked polyethylene (PEX) material is provided wherein the base polymer is intermixed with a polymer modifier which affects the amorphous region of the polymer, leaving the crystalline portion of the base polymer virtually unaffected. Consequently, the amorphous region's density is lowered, resulting in a more flexible final product, while the crosslinked molecular structure and/or crystalline portion of the polymer, which controls the strength of the base polymer, remains strong. The polymer modifier can comprise a hydrocarbon fluid such as PAO, Group III basestocks, or a gas-to-liquid hydrocarbon. A method for producing the plastic material is also provided. The plastic material has particular utility in the production of tubing, piping, and conduits for transporting gases, liquids, and the like, as well as wire and cable coatings such as jacketing and insulation.

L'invention porte sur une matière de polyéthylène réticulé (PEX), flexible, de résistance élevée, dans laquelle le polymère de base est entremêlé avec un modificateur de polymère qui affecte la région amorphe du polymère, laissant à la partie cristalline du polymère de base pratiquement non affectée. En conséquence, la densité de la région amorphe est abaissée, conduisant à un produit final plus flexible, alors que la structure moléculaire réticulée et/ou partie cristalline du polymère, qui contrôle la résistance du polymère de base, reste résistante. Le modificateur de polymère peut comprendre un fluide hydrocarboné tel que le PAO, les huiles de base de Groupe III ou un hydrocarbure gaz à liquide. L'invention porte également sur un procédé de fabrication de la matière plastique. La matière plastique a une utilité particulière dans la production de tubes, de canalisations et de conduits pour transporter des gaz, des liquides et similaires, ainsi que des revêtements de fils et de câbles tels qu'un chemisage et une isolation.

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