PAINTABLE OLEFINIC INTERPOLYMER COMPOSITIONS

摘要

Paintable thermoplastic polyolefin compositions are disclosed which comprise (i) 30 to about 70 wt % of at least one polypropylene or graft-modified polypropylene, (ii) 0 to about 40 wt % of at least one nongrafted or graft-modified substantially linear ethylene polymer, and (iii) 0 to about 50 wt % of an interpolymer of ethylene and an alpha , beta -unsaturated carbonyl copolymer, e.g. a copolymer of ethylene and acrylic acid. The polypropylene and substantially linear ethylene polymer are grafted with an unsaturated organic compound containing at least on ethylenic unsaturation and at least one carbonyl group, e.g. maleic anhydride. The compositions exhibit excellent paintability with conventional paints without prior application of a primer or surface treatment, good heat resistance, and good low temperature impact resistance and they can be recycled by melt blending the compositions with thermoplastic materials, e.g., in an extruder.