A method for controlling dispersion size of elastomer in...

Details A method for controlling dispersion size of elastomer in... A method for controlling dispersion size of elastomer in...

C - Chemistry, Metallurgy

08

L

C08L 23/28 (2006.01) C08J 3/20 (2006.01) C08J 3/24 (2006.01) C08L 23/22 (2006.01) C08L 25/16 (2006.01) C08L 77/00 (2006.01)

Patent

CA 2518090

A method for controlling a dispersion size of an elastomer in a thermoplastic elastomer composition having improved durability and impermeability obtained by melt-mixing (A)a halogenated isobutylene elastomer, (B) polyamide and (C) a dispersion aid, anddynamically vulcanizing the resultant blend to form the dynamically vulcanized polymer blend, wherein the halogenated isobutylene elastomer is dispersed in the polyamide matrix at a volume-average dispersion diameter of less than 2.0 ~m.

Procédé de gestion de la taille de dispersion d'un élastomère dans une composition élastomère thermoplastique présentant une durabilité et une perméabilité améliorée. Ce procédé consiste à mélanger à l'état de fusion (A) un élastomère d'isobutylène halogéné, (B) un polyamide et (c) un auxiliaire de dispersion (C), et de vulcaniser dynamiquement le mélange ainsi obtenu pour former le mélange polymère vulcanisé dynamiquement, l'élastomère d'isobutylène halogéné étant dispersé dans la matrice de polyamide selon un diamètre moyen de dispersion de moins de 2,0 ?m.

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