Polyolefin graft copolymers made with fluorinated monomers

Details Polyolefin graft copolymers made with fluorinated monomers Polyolefin graft copolymers made with fluorinated monomers

C - Chemistry, Metallurgy

08

F

C08F 255/00 (2006.01) C08F 214/18 (2006.01) C08J 9/40 (2006.01)

Patent

CA 2345798

A fluorine-containing graft copolymer is made from a backbone of an olefin polymer material to which is graft polymerized a) at least one gaseous fluorinated monomer such as vinylidene fluoride, b) at least one fluorinated acrylic acid or ester, c) a mixture of (a) and (b), or d) a mixture of (a) and/or (b) and a non- fluorinated monomer such as methyl methacrylate. An organic peroxide or a polymeric peroxide is used as the initiator for the graft polymerization process. The graft copolymers have improved surface properties and oxygen barrier properties, and improved thermal stability.

L'invention concerne un copolymère greffé à base de fluor . Ce copolymère est obtenu à partir d'un squelette d'un matériau polymère d'oléfine auquel est polymérisé avec greffage (a) au moins un monomère fluoré gazeux comme le fluorure de vinylidène, (b) au moins un acide ou un ester acrylique fluoré, (c) un mélange de (a) et (b) ou (d) un mélange de (a) et/ou (b) et un monomère non fluoré comme le méthyle méthacrylate. On utilise un péroxyde organique ou un péroxyde polymère comme initiateur pour le processus de polymérisation avec greffage. Ces copolymères présentent des propriétés de surface améliorées et des propriétés de barrières à l'oxygène, et une stabilité thermique améliorée.

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