Dynamically vulcanized multi-component polymer blend

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/02 (2006.01) C08L 23/08 (2006.01) C08L 23/16 (2006.01) C08L 63/00 (2006.01)

Patent

CA 2125682

Dynamically vulcanized multi-component polymer blends are prepared containing thermoplastic polyolefins, non-vulcanized rubber, and ethylene-vinyl acetate-maleic anhydride terpolymer crosslinked in situ. The dynamically vulcanized blend is prepared from a crosslinkable composition containing thermoplastic polyolefin, rubber, non-crosslinked ethylene-vinyl acetate-maleic anhydride terpolymer, epoxy, and tertiary amine. The crosslinkable composition is crosslinked at an elevated temperature for sufficient time to crosslink the ethylene-vinyl acetate maleic anhydride terpolymer without substantial decomposition forming uniform dispersion of small particles of rubber and ethylene-vinyl acetate- terpolymer in the thermoplastic polyolefin matrix.

Mélanges polymères à composants multiples et vulcanisés de façon dynamique contenant des polyoléfines thermoplastiques, du caoutchouc cru, et un terpolymère éthylène-acétate de vinyle-anhydride maléique réticulé in situ. Le mélange à vulcanisation dynamique est préparé à partir d'une composition réticulable renfermant une polyoléfine thermoplastique, du caoutchouc, un terpolymère éthylène-acétate de vinyle-anhydride maléique non réticulé, de l'époxy et une amine tertiaire. La composition réticulable est réticulée à une température élevée pendant une durée suffisante pour réticuler le terpolymère précité sans décomposition substantielle et former une dispersion uniforme des petites particules de caoutchouc et du terpolymère précité dans la matrice de polyoléfine thermoplastique.

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