Engineered polyolefin materials
AssigneeSolvay Engineered Polymers
InventorsSatchit Srinivasan, Edward Szczepaniak
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Abstract
Thermoplastic olefinic, polymer blends which have superior physical properties and adherence for coating materials such as paints are disclosed. The blends may be formed from various combinations of homopolymers of propylene having an isotactic index >0.93, and/or crystallinity >56%, sequentially polymerized blends of polypropylene and ethylene-propylene copolymers, copolymers of ethylene and butene produced with Kaminsky catalysts, and copolymers of ethylene and octene produced with Kaminsky catalysts with C.sub.3 -C.sub.15 alpha olefins.
Claims4
A thermoplastic material consisting essentially of a blend of about 50-80% by weight of a homopolymer of propylene having an isotactic index which is greater than 0.93 or a crystallinity which is greater than 56%;
- about 12-22% by weight of a copolymer of ethylene and butene produced with a metallocene or Kaminsky catalyst and having a molecular weight distribution (Mw/Mn) which is less than or equal to 3;
- about 11-23% by weight of a copolymer of ethylene and octene produced with a metallocene or Kaminsky catalyst and having a molecular weight distribution (Mw/Mn) which is less than or equal to 3;
- and about 0.1 to 10% by weight of filler.
Dependencies are inferred from the claim text.