Coextrusion binder based on a cografted polyolefine mixture

Details Coextrusion binder based on a cografted polyolefine mixture Coextrusion binder based on a cografted polyolefine mixture

C - Chemistry, Metallurgy

08

L

154/140, 400/308

C08L 51/06 (2006.01) B32B 27/06 (2006.01) B32B 27/32 (2006.01) C08F 255/00 (2006.01) C08F 255/02 (2006.01)

Patent

CA 2203178

The invention concerns a mixture useful as a co-extrusion binder, including: at least (A) one polyethylene or ethylene copolymer, at least (B) of (B1) a polypropylene or copolymer of propylene, (B2) poly (1-butene) homo or copolymer and (B3) homo polystyrene or copolymer, the mixture of (A) and (B) being accomplished by a functional monomer, this mixture being itself eventually diluted in at least one polyolefin (C) or at least one polymer (D) of an elastomeric nature or in a mixture of (C) and (D). This functional monomer is preferably a maleic anhydride. The invention also concerns polyolefin/binder/polyamide, EVOH, polyester or metal. It is useful in packaging.

L'invention concerne un mélange utile comme liant de coextrusion, comprenant: - au moins (A) un polyéthylène ou un copolymère de l'éthylène, - au moins (B) choisi parmi (B1) le polypropylène ou un copolymère du propylène, (B2) le poly (1-butène) homo ou copolymère, et (B3) le polystyrène homo ou copolymère, le mélange de (A) et (B) étant greffé par un monomère fonctionnel, ce mélange greffé étant lui-même éventuellement dilué dans au moins une polyoléfine (C) ou dans au moins un polymère (D) à caractère élastomérique ou dans un mélange de (C) et (D). Ce monomère fonctionnel est de préférence de l'anhydride maléique. L'invention concerne aussi des structures polyoléfine/liant/polyamide, EVOH, Polyester ou métal. Elle est utile pour faire des emballages.

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