POLYPROPYLENE MATERIALS GRAFTED WITH AN EPOXYALKYL ACRYLATE COMPOUND

摘要

A polypropylene composition grafted with an epoxy-alkyl acrylate compound of general formula (I), wherein R is H or C1-4 alkyl, and n is an integer of 1 to 6. The grafted polypropylene composition has a melt flow index MFI in the range of 1 to 250 g/10 min, and a degree of grafting of 0.2 % to 10 % by weight, and is preferably prepared in an extruder, by (i) reacting the polypropylene composition during melting and/or in a melted condition, with an organic peroxide as a radical-generating compound in an inert atmosphere, (ii) introducing the epoxy-alkyl acrylate compound into the extruder through an aperture in the wall of the extruder barrel at a position of the extruder where the polypropylene composition with added peroxide is in a melted condition, (iii) processing the mixture in the extruder until the epoxy-alkyl acrylate compound has reacted with the polypropylene composition to a desired degree of grafting, and (iv) cooling and granulating the extruded product.