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US 7,030,188 B2Granted
Multi-phase polypropylene compositions
AssigneeEquistar Chemicals, LP
InventorsMaged G. Botros, Mark P. Mack, James H. Meas, Clifford C. Lee
Life of this patent
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Abstract
Improved multi-phase polypropylene composites are provided. The compositions are comprised of a polypropylene base resin, a non-compatible dispersed phase which can be a polymer or filler material and a propylene-ethylene copolymer grafted with a carboxylic acid or carboxylic acid derivative.
Claims7
A composition comprising
- (1) 30 to 98.5 weight percent highly crystalline polypropylene base resin having a tacticity index greater than 90 and melt flow rate from 0.5 to 100 g/10 min.;
- (2) 1 to 70 weight percent polymers which is incompatible with said base resin selected from the group consisting of ethylene-vinyl alcohol copolymer, polyamide, polyester, polyvinylchloride, polyvinylidenedichloride, ethylene-carbon monoxide copolymer and terpolymer, polycarbonate, polyether, high impact polystyrene styrene-acrylonitrile copolymer and acrylonitrile-butadiene-styrene terpolymer;
- and
- (3) 0.25 to 10 weight percent grafted propylene-ethylene impact copolymer having an ethylene content from 5 to 30 percent and molecular weight distribution of 7 or less and which is a reactor-made intimate mixture of propylene homopolymer and 20 weight percent or more propylene-ethylene copolymer grafted with 1 weight percent or more maleic anhydride.
1 more element
Dependencies are inferred from the claim text.