Flame retardant polypropylene composition
AssigneeFerro Corporation
InventorsDeenadayalu Chundury, Roy Sanford
Life of this patent
Estimating the term…
Abstract
The present invention provides a new and improved flame retardant polypropylene composition that exhibits substantially no bloom and plate-out during processing and use. In a preferred embodiment the composition comprises a homopolymer or copolymer of polypropylene, a styrene butadiene compatibilizer, a bromine and phosphorus containing flame retardant additive and a metallocene ethylene copolymer. In addition to displaying excellent color development characteristics, the composition of the present invention displays excellent physical properties and a UL94 rating of V-2.
Claims7
A flame retardant polypropylene containing a composition comprising a blend of:
- (I) a homopolymer or a copolymer of polypropylene or a mixture of such homopolymer and copolymer;
- (II) a compatibilizer comprising a block polymer of a vinyl aromatic monomer and a conjugated diene, a partially hydrogenated derivative thereof, or a selectively hydrogenated derivative thereof to which has been granted an unsaturated carboxylic reagent;
- (III) a bromine containing flame retardant additive comprising tris(tribromoneopentyl) phosphate;
- and
- (IV) an ethylene copolymer made using a metallocene catalyst.
Dependencies are inferred from the claim text.