Reactive melt extrusion grafting of thermoplastic polyvinyl...

Details Reactive melt extrusion grafting of thermoplastic polyvinyl... Reactive melt extrusion grafting of thermoplastic polyvinyl...

C - Chemistry, Metallurgy

08

L

C08L 23/26 (2006.01) C08G 81/02 (2006.01) C08L 29/04 (2006.01) C08L 31/04 (2006.01) C08L 51/04 (2006.01) C08L 51/06 (2006.01)

Patent

CA 2101371

ABSTRACT A method for preparing a compatible blend of polyolefin and thermoplastic polyvinyl alcohol comprising: (a) melting polyolefin in the initial elements of a melt extruder, (b) adding and melt blending an unsaturated carboxylic acid or anhydride with the melted polyolefin downstream in the extruder, (c) adding peroxide to the melt blend and grafting the unsaturated carboxylic acid or anhydride onto the polyolefin, and (d) melt blending thermoplastic PVOH into the grafted polyolefin/unsaturated carboxylic acid or anhydride melt mixture,

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