Blown films, especially monolayer blown films, of high stiffness, the blown films comprising at least 95.0 wt % of a specific propylene-1-butene random copolymer.

A propylene polymer composition is provided. The propylene polymer composition comprises a metallocene-catalyzed propylene homopolymer, from about 15 wt. % to about 60 wt. % of glass fibers having an average fiber length of about 4.5 mm or less, and a compatibilizer comprising a functionalized polyolefin. The propylene polymer composition exhibits a fogging value of about 0.6 mg or less as determined according to DIN 75201:2011 (method B). The composition also exhibits a flexural modulus of about 4,000 MPa or more as determined at a temperature of about 23° C. by ISO 527:2019.

The invention provides a polyolefin-based resin film formed from a polypropylene-based resin composition and containing, in a total of 100 parts by weight of the polypropylene-based resin composition, 20-95 parts by weight of a propylene-α olefin random copolymer containing a metallocene-based olefin polymerization catalyst; 0-75 parts by weight of a propylene-α olefin random copolymer containing a Ziegler-Natta-based olefin polymerization catalyst; and 5-15 parts by weight of at least one type of an elastomer selected from the group consisting of an ethylene-butene copolymer elastomer, a propylene-butene copolymer elastomer, and an ethylene-propylene copolymer elastomer, wherein a heat shrinkage ratio in a direction in which a heat shrinkage ratio is larger among a longitudinal direction and a width direction of the polyolefin-based resin film is 1-10%, and an orientation coefficient ΔNx in an x-axis direction calculated from a refractive index of the polyolefin-based resin film is 0.0130-0.0250.

A high melt strength resin composition includes at least a) non-functionalized polypropylene, b) at least one acrylate such as zinc diacrylate, calcium diacrylate or aluminum triacrylate in a total amount of from 0.1 to 5% by weight based on the weight of non-functionalized polypropylene, and c) at least one acid neutralizer in a total amount of from 0.005 to 5% by weight based on the total weight of the at least one acrylate. The resin composition is compounded at a processing temperature between 185° C. and 260° C. to obtain the high melt strength polypropylene.

Provided herein are roofing membranes that comprise a blend composition of propylene-based elastomer, thermoplastic resin, flame retardant, and ultraviolet stabilizer. In some embodiments, the blend compositions further comprise polyalphaolefin.

A multimodal polyethylene composition having a lower molecular weight (LMW) ethylene homo or copolymer component (A) and a higher molecular weight ethylene copolymer component (B); wherein the LMW component comprises two fractions (ai) and (aii); wherein the polymer composition has a density of 930 kg/m3 or more (ISO1183), such as 938 to 955 kg/m3, an MFR2 (ISO1133 at 190° C. and 2.16 kg load) in the range of 0.05 to 10 g/10 min, a flex modulus of up to 800 MPa (ISO 178:2010), such as 300 to 800 MPa (ISO 178:2010) and a taber abrasion resistance of 8.0 to 13.0 mg/1000 cycle (ASTM D 4060: 2014).

The invention relates to a nontacky film-forming polymer composition (cover material), and tacky hot melt adhesives in the form of pellets which are coated with the polymer composition and producible by coextruding the hot melt adhesive and the cover material. The film-forming composition comprises 5 to 40% by weight of at least one Fischer-Tropsch wax having a melting point of >95° C. and 30 to 70% by weight of at least one metallocene-catalyzed polyolefin having a softening point of >95° C. and a melt flow index (MFI) (230° C., 2.16 kg) of ≦1000 and ≧300 g/10 minutes. The invention further relates to suitable uses for such hot melt adhesives, methods for their use, and products containing these adhesives.

Processes are provided which include copolymerization using one or both of a metallocene catalyst capable of producing high molecular weight polymers and a metallocene catalyst capable of producing polymers having 60% or more vinyl terminations. Polymerization processes include dual catalyst polymerization in a single polymerization zone comprising both metallocene catalysts. Other processes include serial or parallel polymerizations in multiple polymerization zones, using either or both catalysts in each polymerization zone. Such polymerization processes produce reactor blends, and are particularly suited for producing copolymer compositions (such as EP or EPDM copolymer compositions) exhibiting improved melt elasticity and rheological properties.

The present invention relates to a multimodal polymer of ethylene, to the use of the multimodal polymer of ethylene in film applications and to a film comprising the multimodal polymer of ethylene of the invention.

A first embodiment which is a bimodal polymer having a weight fraction of a lower molecular weight (LMW) component ranging from about 0.25 to about 0.45, a weight fraction of a higher molecular weight (HMW) component ranging from about 0.55 to about 0.75 and a density of from about 0.931 g/cc to about 0.955 g/cc which when tested in accordance with ASTM D1003 using a 1 mil test specimen displays a haze characterized by equation: % Haze=2145−2216*Fraction.sub.LMW−181*a molecular weight distribution of the LMW component (MWD.sub.LMW)−932*a molecular weight distribution of the HMW component (MWD.sub.HMW)+27*(Fraction.sub.LMW*MWD.sub.LMW)+1019*(Fraction.sub.LMW*MWD.sub.HMW)+73*(MWD.sub.LMW*MWD.sub.HMW) wherein fraction refers to the weight fraction of the component in the polymer as a whole.