Abstract: Polypropylene resin compositions are provided that are useful in the production of biaxially oriented polypropylene films (BOPPs). The resins of the present invention are blends of high crystalline (low solubles) polypropylene homopolymer and an ethylene/propylene random copolymer (RCP). These blends can be used to replace standard high solubles BOPP grade polypropylene homopolymers. In addition, the use of high crystalline polypropylene homopolymers in the blends imparts improved stiffness to the finished films while maintaining good processability of the blends.

Abstract: Polypropylene impact copolymers and methods of making them are provided. These impact copolymers achieve a balance between stiffness and impact strength and additionally higher gloss by the inclusion therein of a bimodal distribution of rubber particles.

Abstract: The present invention provides polypropylene having xylene solubles from 0.6 to 1.5 weight percent and isotacticity equal to or greater than about 98.0 percent. The polypropylene is obtained by contacting propylene monomer under suitable polymerization conditions with (a) a Ziegler-Natta catalyst, (b) a co-catalyst, and (c) an electron donor.

Abstract: The present invention provides polypropylene made by dispersing at least one, cracking-resistant polymer therein for controlled rheology treatment to yield a polypropylene polymer with a high melt flow rate and good molding characteristics.

Abstract: The present invention provides polypropylene films and methods of making these films using high melt strength &bgr;-crystalline polypropylene. The films of the present invention are opaque, porous and have good physical properties, such as being capable of cold drawing to a thin gauge without breaking.

Abstract: Polypropylene impact copolymers and methods of making them are provided. These impact copolymers achieve a balance between stiffness and impact strength and additionally higher gloss by the inclusion therein of a bimodal distribution of rubber particles.

Abstract: Synthetic hydrotalcites of the general formula

Abstract: Polypropylene impact copolymers and methods of making them are provided. These impact copolymers achieve a balance between stiffness and impact strength and additionally higher gloss by the inclusion therein of a bimodal distribution of rubber particles.

Abstract: Synthetic hydrotalcites of the general formula

Abstract: The present invention provides a catalyst system that exhibits control of desired properties in the polymer product. The catalyst system includes a conventional supported Ziegler-Natta catalyst in combination with an electron donor having the general formula SiRm(OR′)4-m where R is selected from the group consisting of an alkyl group, a cycloalkyl group, an aryl group and a vinyl group; R′ is an alkyl group; and m is 0-3, wherein when R is an alkyl group, R may be identical with R′; when m is 0, 1 or 2, the R′ groups may be identical or different; and when m is 1, 2 or 3, the R groups may be identical or different. The system easily achieves efficiencies over 30 kg/g-cat·h. The system also exhibits good control over the xylene solubles of the polymer products and produces a highly crystalline polymer product.

Abstract: A polyolefin metallocene catalyst which includes two metallocene components, a stereorigid isospecific metallocene catalyst component and a stereorigid syndiospecific metallocene catalyst component, both of which are supported upon the same support. A method of forming a catalyst system includes contacting the above catalyst with a cocatalyst or Lewis acid. A method of polymerization includes contacting an olefin with the catalyst system.

Abstract: The present invention provides a method for preparing flexible thermoplastic compositions which may be used separately or combined with up to fifty percent thermoplastic scrap. One embodiment of the invention comprises creating a melt-blend of blending composition, up to 50% by weight thermoplastic scrap and up to 15% by weight poly(ethyl-co-vinyl) acetate wherein the blending composition comprises an isotactic polypropylene, impact modifier and plasticizer. The polypropylene, impact modifier and plasticizer are selected to meet requirements of flexible thermoplastic compositions useful in vehicle interiors. In another embodiment of the invention a random polypropylene is used.

Abstract: The disclosure relates to a carpet, a process for manufacturing a carpet and a method for recycling a carpet. The carpet of the present disclosure includes a primary backing having tufts of synthetic carpet fibers protruding from a top surface and, optionally, a secondary backing, with an extruded sheet of a polyolefin polymer composition between and integrally fused to a bottom surface of the primary backing and an upper surface of the secondary backing. The extruded sheet polymer composition comprises at least 10%, preferably, at least 20% by weight of a syndiotactic polypropylene product. The extruded sheet polymer composition may further comprise less than 40% by weight of an impact modifier. The process for manufacturing the recyclable carpet includes contacting the extruded sheet with the primary backing and, optionally, the secondary backing, at a temperature sufficiently high to integrally fuse the extruded sheet to the respective backing.

Abstract: Polypropylene impact copolymers and methods of making them are provided. These impact copolymers achieve a balance between stiffness and impact strength and additionally higher gloss by the inclusion therein of a bimodal distribution of rubber particles.

Abstract: The present invention provides polypropylene films and methods of making these films using high melt strength &bgr;-crystalline polypropylene. The films of the present invention are opaque, porous and have good physical properties, such as being capable of cold drawing to a thin gauge without breaking.

Abstract: The present invention provides polypropylene made by dispersing at least one, cracking-resistant polymer therein for controlled rheology treatment to yield a polypropylene polymer with a high melt flow rate and good molding characteristics.

Abstract: A polyolefin metallocene catalyst which includes two metallocene components, a stereorigid isospecific metallocene catalyst component and a stereorigid syndiospecific metallocene catalyst component, both of which are supported upon the same support. A method of forming a catalyst system includes contacting the above catalyst with a cocatalyst or Lewis acid. A method of polymerization includes contacting an olefin with the catalyst system.

Abstract: Provided is a process of polymerization wherein the catalyst comprises: A) a catalyst component consisting essentially of titanium, magnesium, halogen, a polycarboxylic ester, and an organic phosphorus compound; B) electron donor described by the formula:  wherein R1 is alkyl or cycloakylgroup containing at least one secondary or tertiary carbon atom, R2 and R3 are each independently alkyl or aryl group, and R4 is an alkyl group having a primary carbon bonded to the silicon atom; and C) organic aluminum compound.

Abstract: The present invention relates to polypropylene compositions for forming articles through extrusion. These parts are particularly useful in automotive body side moldings applications. In one embodiment, the invention is directed to an extruded resin material comprising (a) a skin layer of polypropylene polymer and (b) a core layer composition comprising a polypropylene polymer with an impact modifier and an inorganic filler. The core composition preferably comprises about 25-30 percent by weight of the impact modifiers. The impact modifier is preferably a copolymer of ethylene and a higher alpha olefin. The inorganic filler is present in an amount of about ten percent by weight.

Abstract: Provided is polyolefin composition, the majority of which is highly isotactic polypropylene, comprising the property of heat of melting (&Dgr;Hm) greater than or equal to about 89 J/g.