Abstract: The present invention is directed to a pneumatic tire comprising at least one component, the at least one component comprising a polymer blend comprising a copolymer and an additional polymer, the copolymer comprising: a polymeric backbone chain derived from a monomer comprising at least one conjugated diene monomer and optionally at least one vinyl aromatic monomer; and polymeric sidechains bonded to the backbone chain, the sidechains comprising a polymer immiscible with the backbone; the additional polymer consisting of a polymer miscible with the polymeric sidechains.

Abstract: The present invention relates to a process for recycling product streams that have been separated from a hydrocarbon-containing feed stream comprising olefin monomer, olefin co-monomer, hydrocarbon diluent and components such as H2, N2, O2, CO, CO2, and formaldehyde. In accordance with the present process a hydrocarbon-containing feed stream is separated into a) a first side stream comprising hydrocarbon diluent and olefin monomer; b) a second side stream which is substantially hydrogen-free and comprises hydrocarbon diluent and olefin monomer, c) a bottom stream comprising substantially olefin-free hydrocarbon diluent, and d) an overhead vapor stream comprising olefin monomer, hydrocarbon diluent and components such as formaldehyde, H2, N2, O2, CO and CO2. The present process further includes recycling said first and said second side streams in a polymerization process for preparing bimodal polyolefin.

Abstract: Provided is an adhesive resin composition having improved heat resistance without deteriorations in adhesive strength and flexibility. The adhesive resin composition comprises 30 to 98 wt % of an ethylene/vinyl acetate copolymer (a) and 70 to 2 wt % of a propylene resin composition (P), wherein the total of the component (a) and the component (P) is 100 wt %. The propylene resin composition (P) comprises 60 to 0 wt % of a propylene polymer (b) having a melting point of 120 to 170° C. and a melt flow rate of 0.1 to 500 g/10 min, and 40 to 100 wt % of a propylene polymer (c) having a melting point of less than 120° C. or showing no melting points and having a melt flow rate of 0.1 to 500 g/10 min, wherein the total of the component (b) and the component (c) is 100 wt %.

Abstract: High temperature performance hot melt adhesives are formulated for application at low temperature, i.e., below 300° F. Hot melt adhesive formed with metallocene polymer together with a maleated polyethylene wax show an excellent balance of high and low temperature performance and are particularly useful as packaging case and carton adhesive.

Abstract: A process for preparing modified thermoplastic vulcanizate compositions, the process comprising the steps of introducing molten thermoplastic vulcanizate and a free-radical source, where the thermoplastic vulcanizate includes cured rubber dispersed within a thermoplastic matrix.

Abstract: Propylene impact copolymers (ICPs) are provided which comprise: (a) a matrix phase which comprises from 60 to 95 weight % of a polypropylene polymer containing from 0 to 6 mole % of units derived from one or more alpha-olefins other than propylene, and (b) a dispersed phase which comprises from 5 to 40 weight % of a copolymer derived from a first comonomer which can be either propylene or ethylene together with a second alpha-olefin comonomer. The ICP is further characterized by having a beta/alpha ratio less than or equal to 1.1. The ICPs of the present invention are particularly well suited for applications requiring clear, tough polymers such as thin walled injection molded articles for frozen food packaging applications.

Abstract: There is provided a polypropylene resin composition comprising a propylene polymer (A) containing 0 to 70% by mass of a propylene homopolymer (A-1) and 30 to 100% by mass of a propylene-ethylene block copolymer (A-2) defined below, an ethylene-?-olefin copolymer (B) defined below, and an inorganic filler (C), wherein the proportion of the amount of the (A), the proportion of the amount of (B), and the proportion of the amount of (C) relative to the total amount of the (A), the (B) and the (C) are 40 to 94% by mass, 5 to 30% by mass, and 1 to 30% by mass, respectively, the propylene-ethylene block copolymer (A-2) is a mixture of a propylene homopolymer component and a propylene-ethylene random copolymer component, wherein the intrinsic viscosity, as measured in Tetralin of 135° C., of the propylene-ethylene random copolymer component is within the range of 2.0 to 8.

Abstract: Propylene copolymer having a melt flow rate MFR2 (230° C.) in the range of 2.5 to 12.0 g/10 min, a xylene cold soluble content (XCS) in the range of 20.0 to 45.0 wt.-%, a comonomer content in the range of more than 7.5 to 12.0 wt.-%, wherein further the comonomer content of xylene cold soluble (XCS) fraction of the propylene copolymer is in the range of 16.0 to 28.0 wt.-%.

Abstract: A hot melt adhesive material and articles made using the hot melt adhesive to assemble structures in an article. The adhesive material typically is manufactured by blending amorphous polymer with a heterophase polymer having crystallinity into an adhesive composition.

Abstract: A process for the preparation of propylene polymer compositions comprising from 50 to 90% by weight of a propylene (co)polymer fraction insoluble in xylene at 25° C., and from 10 to 50% by weight of an ethylene copolymer fraction soluble in xylene at 25° C., said process comprising: (i) a first step of polymerizing propylene in the optional presence of ethylene and/or C4-C10 alpha olefins, to produce a propylene (co)polymer being for at least 85% by weight insoluble in xylene at 25° C.

Abstract: Provided are methods for producing a thermoplastic vulcanizate. One method includes charging vulcanizable rubber to a reactor; charging a masterbatch of thermoplastic resin and a catalyst for a phenolic resin curative to the reactor; charging a phenolic resin curative to the reactor; and dynamically vulcanizing the rubber with the phenolic resin curative in the presence of the catalyst. Also provided are thermoplastic vulcanizates made by the methods of the invention.

Abstract: Disclosed herein are polymerization processes for the production of olefin polymers. These polymerization processes can use a dual catalyst system containing a zirconium or hafnium based metallocene compound and a titanium based half-metallocene compound containing an indenyl group.

Abstract: A hot melt adhesive material and articles made using the hot melt adhesive to assemble structures in an article. The adhesive material typically is manufactured by blending amorphous polymer with a heterophase polymer having crystallinity into an adhesive composition.

Abstract: A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipment such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend's favorable properties, which polyethylene itself can be used further in coating cables and for producing moldings, especially rotomoulded articles.

Abstract: The present invention is directed to a modified polypropylene comprising from 0.3 to 2 long-chain branches per 1,000 carbon atoms, wherein said long-chain branch has more than 1,000 carbon atoms and 0 to 6% of ethene and/or alpha-olefinic comonomer having 3 to 18 carbon atoms. The polypropylene of the present invention is a homopolymer, a random copolymer, or a heterophasic copolymer. The present invention also relates to large, deep, complex and/or thick articles which are thermoformed from said polypropylene. Furthermore, the present invention relates to the process for thermoforming said modified polypropylene into large, deep, complex and/or thick articles. The present invention also relates to the use of the polypropylene to prepare large, deep, complex and/or thick articles.

Abstract: The invention provides a resin composition for a sealant capable of improving non-adsorption properties and heat sealing properties with respect to an organic component in an article contained, a laminated film and a packaging bag. The resin composition for a sealant of the invention is made of a resin obtained by blending a cycloolefin polymer (COP), a cycloolefin copolymer (COC) and polyethylene (PE), and the blending ratio is 42 weight % to 98 weight % of the cycloolefin polymer (COP), 1 weight % to 49 weight % of the cycloolefin copolymer (COC) and 1 weight % to 19 weight % of the polyethylene (PE).

Abstract: A coating composition, a process for producing it and substrate coated therewith are described. The composition comprises a multimodal ethylene polymer, which contains from 80 to 99.8% by weight of ethylene repeating units and from 0.2 to 20% by weight of C3-C20 ?-olefin repeating units, and is a blend of at least a first and a second ethylene polymer prepared by polymerization in the presence of a single site catalyst system. The blend has a density of 0.915-0.955 g/cm3, a melt flow rate, MFR2, of 0.028-1.5 g/10 min., a molecular weight distribution, Mw/Mn, of 3-10, and a CTL 5.0 MPa-value according to ISO 6259 of at least 500 hrs.

Abstract: A solar cell panel end-sealing composition contains a butyl rubber, a polyolefin resin having a silyl group, and a catalyst. The catalyst is at least one of a metal oxide, a metal hydroxide, and a metal complex of a transition element and the solar cell panel end-sealing composition has a flow viscosity at 140° C. of 500 Pa·s or more and 8000 Pa·s or less.

Abstract: A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: A. Injecting a first feed comprising ethylene and optionally a chain transfer agent system (CTA system) into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that the second reactor zone contains a CTA system having a transfer activity Z2; and with the proviso that the ratio of Z1/Z2 is less than 1.

Abstract: Composition comprising a polypropylene matrix (M-PP), at least one elastomeric copolymer (EP), a high density polyethylene (HDPE) being bimodal or multimodal, and a filler (F).

Abstract: The present invention relates to a polyolefin composition comprising a heterophasic propylene copolymer having a MFR2 of at least 5 g/10 min and a polyethylene (PE) having a density of at least 935 kg/m3 and a melt flow rate MFR5 (190° C.) of less than 1.5 g/10 min.

Abstract: An RF-weldable thermoplastic elastomer composition, including a thermoplastic elastomer of non-RF-weldable or poorly RF-weldable character, e.g., a styrenic copolymer/olefinic polymer blend thermoplastic elastomer, and polyol in an amount that is less than 1% by weight, based on weight of the thermoplastic elastomer, and is effective to enhance RF-weldability of the thermoplastic elastomer. The composition may also contain an antistatic ionomer, in an amount that is less than 15% by weight, based on weight of the thermoplastic elastomer. Films of such composition are usefully employed to form RF-welded film articles, such as blood bags, IV fluid bags, glucose bags, urine bags, stool bags, biological sample bags, pouches, covers, and liners.

Abstract: The present invention relates to an adhesive, comprising at least one polymer system obtained by a process for reducing the melt viscosity of at least one polymer blend starting material, wherein the process comprises the step of treating at least one polymer blend with at least one radical donor under shear stress at a temperature above the softening point of said polymer blend.

Abstract: A polymeric resin having a density of greater than about 0.960 g/cc, a melt index of from about 1.3 g/10 min. to about 2.8 g/10 min., a zero shear viscosity of from about 1×104 Pa*s to about 1×105 Pa*s, a recoverable shear parameter of from about 220 to about 370, and a CY-a parameter of from about 0.155 to about 0.200. A polymeric resin having an initial tension defined by the equation IT??1.67*(MI)+b where b is 5.17 and a percent decrease in the extrusion pressure of the resin of about 30% when compared to polymer resin of similar melt index prepared with a catalyst that has not undergone an activation comprising an oxidation, reduction, oxidation sequence wherein the resin when formed into a film has a moisture vapor transmission rate of from about 0.21 g.mil/100 in2/day to about 0.33 g.mil/100 in2/day.

Abstract: A thermoplastic vulcanizate comprising a dynamically cured rubber, where the rubber is peroxide cured, and a thermoplastic phase, where at least 10% by weight of the thermoplastic phase includes an ultrahigh molecular weight plastic, where the ultrahigh molecular weight plastic is characterized by a Mw that is greater than 0.8×106 g/mole.

Abstract: The present invention relates to the use of polyolefins having isotactic structural elements in floor coverings, in particular in carpets or artificial lawns.

Abstract: The present invention relates to a resin composition for a polyolefin resin foam, including: a polyolefin (A) having a melt flow rate (MFR) at a temperature of 230° C. of 0.2 to 0.7 g/10 min and a melt tension at break measured at a temperature of 190° C. of 30 cN or more; and a polyolefin (B) having a melt flow rate (MFR) at a temperature of 230° C. of 1.5 to 10 g/10 min and a melt tension at break measured at a temperature of 190° C. of 10 cN or more, in which the polyolefin (B) is contained in an amount of from 15 to 75 parts by weight based on 100 parts by weight of the polyolefin (A).

Abstract: The present invention relates to polypropylene compositions with a balance of high strength, good clarity, excellent stress whitening resistance, and excellent impact properties—especially at low temperatures—for use in demanding plastics applications. Blends consist of both homopolymer and random copolymer polypropylene fractions, as well as propylene-ethylene elastomers and styrenic based elastomers. The invention also covers molded articles made from these blends.

Abstract: Method for the preparation of a sticky high impact heterophasic polypropylene (HECO) in a reactor facility comprising in series (i) a first reaction system, (ii) a first conveying line connecting the first reactor system with a second reactor system comprising an outlet, (iii) a second conveying line connecting the outlet with a purge bin comprising a feeder, and (iv) a conveying system being connected with the feeder, and the preparation of said heterophasic polypropylene (HECO) comprises the steps in the order of (a) producing in said first reactor system the polypropylene matrix (M), (b) transferring at least a part of said polypropylene to said second reactor system via the first conveying line, (c) producing in said second reactor system the elastomeric copolymer obtaining the heterophasic polypropylene (HECO), (d) discharging said heterophasic polypropylene (HECO) from said second reactor system via the outlet, (e) transferring said discharged heterophasic polypropylene (HECO) via the second conveying l

Abstract: Disclosed is an ethylene-propylene-diene terpolymer having isotactic polypropylene crystallinity compounded with a blend rubber wherein the terpolymer can be present in an amount effective to improve tack, aged tensile strength retention, fatigue resistance, ozone cracking resistance, and reversion resistance. Also disclosed is an elastomer composition wherein the terpolymer can have at least 60 wt % propylene-derived units, at least 6 wt % ethylene-derived units and from 0.3 to 10 wt % diene-derived units, and a tire sidewall composition comprising from 10 to 30 phr terpolymer, from 20 to 60 phr natural rubber, from 20 to 60 phr polybutadiene rubber, and an optional secondary blend rubber. Also disclosed is a vulcanizate of the elastomer composition, and articles, tire sidewalls, tires, retreaded tires, bias truck tires, off-road tires, and passenger automobile tires made with the vulcanizate. Further disclosed are processes for making molded articles and tires, and for retreading tires.

Abstract: The present invention relates to a low density polyethylene having a molecular weight distribution Mw/Mn which is greater than 15, a storage modulus G? (5 kPa) which is above 3000 and a vinylidene content which is at least 15/100k C, compositions, a process for production of the low density polyethylene, a continuous ethylene polymerization method for introducing vinylidene in a low density polyethylene, a method for an extrusion coating process, an article, e.g. an extrusion article, and use in extrusion coating.

Abstract: A polymer suitable for use in a thin film hinge (living hinge) comprising from about 0.1 to about 5 weight % of a C4-8 comonomer and the balance ethylene, said composition having a density as determined according to ASTM D 792 from about 0.945 to about 0.965 g/cm3; a melt index as determined according to ASTM D1238 (2.16 kg/190° C.) from about 10 to about 20 g/10 min; a weight average molecular weight (Mw) from about 45,000 to about 55,000 g/mol; a polydispersity from about 2.5 to about 3.1 and when molded into a strip having a length of about 13 cm and gross thickness from about 50 to about 70 mil (about 1 to about 2 mm) and completely bent over end to end four times to create a thinned region or crease having a thickness from about 15 to about 30 mil (about 0.3 to about 0.7 mm) tested by bending and releasing the deformed thinned region of the strip through a radius of curvature from about 180 to about 190° about a rounded plate goes through not less than 500 cycles without breaking.

Abstract: A propylene polymer composition comprising (percent by weight): A) 65%-85% of a propylene copolymer containing from 2.0% to 5.0% of ethylene derived units having MFR L (Melt Flow Rate according to ASTM 1238, condition L, i.e. 230° C. and 2.16 kg load) from 0.5 to 50 g/10 min and a melting temperature Tm ranging from 146° C. to 155° C.; B) 15%-35%, of a copolymer of ethylene and propylene with from 74% to 87%, of ethylene derived units; the composition having the intrinsic viscosity of the fraction soluble in xylene ranging from 0.8 to 1.2 dl/g preferably from 0.9 to 1.1 dl/g.

Abstract: The instant invention is a sealant composition, method of producing the same, articles made therefrom, and method for forming such articles. The sealant composition according to the present invention comprises: (a) from 70 to 99.5 percent by weight of an ethylene/?-olefin interpolymer composition, based on the total weight of the sealant composition, wherein said ethylene/?-olefin interpolymer composition comprises an ethylene/?-olefin interpolymer, wherein ethylene/?-olefin interpolymer has a Comonomer Distribution Constant (CDC) in the range of from 15 to 250, and a density in the range of from 0.875 to 0.963 g/cm3, a melt index (I2) in a range of from 0.2 to 20 g/10 minutes, and long chain branching frequency in the range of from 0.02 to 3 long chain branches (LCB) per 1000 C; (b) from 0.

Abstract: A bag in box packaging comprising an outer carton having a plurality of sides, thereby defining a cavity, and an inner bag having a wall structure comprising a plurality of layers of a co-extrusion. The inner bag being formed from at least one film having a plurality of seals to define a fluid tight configuration, the inner bag co-extrusion having a plurality of layers with a tie layer having at least 0.5% maleic anhydride-grafted polyethylene. Films made through an orientation process for bag in box packaging is likewise disclosed, as are manufacturing processes.

Abstract: A reactor blend polyethylene composition comprising: from 35 to 70 percent by weight of a first polyethylene component; and a second polyethylene component; wherein the polyethylene resin has a melt index I2 of less than 1 dg/min and greater than or equal to 0.25 dg/min and exhibits a V0.1/V100 of greater than or equal to 9; and wherein the first and second polyethylene components are produced in continuous dual solution polymerization reactors, wherein the second polyethylene component is produced in the presence of the first polyethylene component and wherein a Ziegler-Natta catalyst is present in each of the first and second polymerization reactors is provided. Also provided are methods for producing the polyethylene resin and films made therefrom.

Abstract: The instant invention is a high-density polyethylene composition, method of producing the same, articles made therefrom, and method of making such articles. The high-density polyethylene composition of the instant invention includes a first component, and a second component. The first component is a high molecular weight ethylene alpha-olefin copolymer having a density in the range of 0.915 to 0.940 g/cm3, and a melt index (I21.6) in the range of 0.5 to 10 g/10 minutes. The second component is a low molecular weight ethylene polymer having a density in the range of 0.965 to 0.980 g/cm3, and a melt index (I2) in the range of 50 to 1500 g/10 minutes. The high-density polyethylene composition has a melt index (I2) of at least 1, a density in the range of 0.950 to 0.960 g/cm3, and g? of 1.

Abstract: Thermoplastic compositions including component C, an ethylene/?-olefin interpolymer wherein the interpolymer has a Mooney Viscosity (ML 1+4, 125° C.) greater than, or equal to 55 and a ?Hf greater than, or equal to 36 J/g; and component D, a high density polyethylene (HDPE) are provided. In particular, the thermoplastic compositions are characterized by the ethylene/?-olefin interpolymer which is an ethylene/a-olefin/diene interpolymer having a rheology ratio (V0.1/V 100) at 190° C. greater than, or equal to 25. Also are provided the articles comprising the thermoplastic compositions.

Abstract: An ethylene-based polymer composition has been discovered and is characterized by a Comonomer Distribution Constant greater than about 45. The new ethylene-based polymer compositions are useful for making many articles, especially including films. The polymers are made using a metal complex of a polyvalent aryloxyether.

Abstract: Automotive interior element comprising a polypropylene composition comprising (percent by weight): A) from 60% to 90% of a propylene homopolymer having: i) a polydispersity Index (P.I.) value of from 3.5 to 10.0; ii) a fraction insoluble in xylene at 25° C., higher than 90%; and iii) a MFR L (Melt Flow Rate according to ISO 1133, condition L, i.e. 230° C. and 2.16 kg load) from 50 to 200 g/10 min; B) from 10% to 40%; of a copolymer of propylene with from 30% to 60% of ethylene derived units; the composition having an intrinsic viscosity of the fraction soluble in xylene at 25° C. comprised between 2.5 and 4.0 dl/g; a MFR L (Melt Flow Rate according to ISO 1133, condition L, i.e. 230° C. and 2.16 kg load) from 15 to 100 g/10 min and all the three values of carbon emission measured according to VDA 227 (C-emission) are lower than 30.0 ?gC/g; wherein the values of carbon emission are measured in the ex reactor propylene composition.

Abstract: [Object] To provide a resin composition with excellent mold releasability and blocking resistance. [Solution] A resin composition containing a 4-methyl-1-pentene polymer includes 0.01 to 10 parts by mass of a 4-methyl-1-pentene polymer (B) per 100 parts by mass of at least one resin (A) selected from the group consisting of thermoplastic resins and thermosetting resins, wherein the 4-methyl-1-pentene polymer (B) has (B1) an intrinsic viscosity [?] of 0.01 or more but less than 0.50 dl/g measured at 135° C. in a decalin solvent.

Abstract: Heterophasic propylene copolymers can include a matrix phase and a dispersed phase. The heterophasic propylene copolymers can be characterized by good processability and good mechanical properties, particularly an improved rigidity. The heterophasic propylene copolymers can be well-suited for injection molding applications, particularly for injection molding of thin-walled articles.

Abstract: The invention provides an ethylene-based polymer comprising the following properties: A) a MWDconv from 7 to 10; and B) a “normalized LSF” greater than, or equal to, 9.5.

Abstract: Fibers, tapes, monofilaments including copolymers of ethylene and ?-olefins which exhibit improved tensile properties expressed as a balance between tenacity and elongation at break. The copolymers may be prepared by use of metallocene catalyst systems in particular by use of monocyclopenadienyl catalyst systems. The fibers, tapes, monofilaments of the invention are particularly suitable for end-use applications including artificial grass, woven and nonwoven fabrics, cordages, ropes, netting and flexible intermediate bulk containers.

Abstract: Heterophasic propylene copolymer (HECO) comprising: (a) a polypropylene matrix comprising: (a1) a first propylene homopolymer fraction (PPH1) with a melt flow rate MFR2 (230° C.) measured according to ISO 1133 in the range of >200 to 500 g/10 min, (a2-1) a second propylene homopolymer fraction (PPH2) with a melt flow rate MFR2 (230° C.) measured according to ISO 1133 in the range of >30 to ?200 g/10 min or, (a2-2) a second propylene homopolymer fraction (PPH2) with a melt flow rate MFR2 (230° C.) measured according to ISO 1133 in the range of >5 to ?30 g/10 min and, (a3-1) a third propylene homopolymer fraction (PPH3) with a melt flow rate MFR2 (230° C.) measured according to ISO 1133 in the range of 0.03 to ?5 g/10 min, if the second propylene homopolymer fraction is fraction (a2-1) or, (a3-2) a third propylene homopolymer fraction (PPH3) with a melt flow rate MFR2 (230° C.

Abstract: A metallocene-catalyzed polymer comprising (i) a higher molecular weight component and (ii) a lower molecular weight component wherein the polymer has a polydispersity index of from about 10 to about 26; a zero shear viscosity of from about 5×105 Pa·s to about 2×1014 Pa·s and a smooth-to-matte transition critical stress of from about 20 kPa to about 85 kPa at a shear rate of from about 1.5 s?1 to about 17 s?1. A dual metallocene catalyzed polyethylene comprising (i) a higher molecular weight component and (ii) a lower molecular weight component wherein the polymer has a polydispersity index of from about 10 to about 26; a zero shear viscosity of from about 5×105 Pa·s to about 2×1014 Pa·s and a smooth-to-matte transition stress of from about 20 kPa to about 85 kPa at a shear rate of from about 1.5 s?1 to about 17 s?1.

Abstract: Composition having a melt flow rate MFR2 (230° C.) in the range of 10 to 50 g/10 min. said composition comprises two heterophasic polypropylenes comprising a propylene homopolymer matrix and an elastomeric copolymer, a plastomer and a mineral filler, wherein—said two heterophasic polypropylenes have different melt flow rates, —the first heterophasic polypropylene has a melt flow rate MFR2 (230° C.) in the range of 3.0 to 30.0 g/10 min and—the second heterophasic polypropylene has a xylene cold soluble (XCS) content in the range of 7.0 to 20.0 wt.-%.

Abstract: Disclosed is a multimodal propylene impact copolymer composition with improved stiffness while maintaining good impact strength. The continuous phase has a broad PI and provides the multimodal propylene impact copolymer composition with excellent processability. Thermoformed articles made from the multimodal propylene impact copolymer exhibit improved rigidity and good impact strength.

Abstract: An ethylene-?-olefin copolymer comprising monomer units derived from ethylene and monomer units derived from an ?-olefin having 3 to 20 carbon atoms, having a density (d) of 860 to 950 kg/m3, having a melt flow rate (MFR) of 0.01 to 100 g/10 min, having a bimodal molecular weight distribution, and having a single melting peak measured by a differential scanning calorimeter (DSC).

Abstract: A polypropylene composition comprising: A) from 30% to 90% by weight of a propylene polymer composition comprising: a1) from 20% to 90% of a propylene homopolymer, or a copolymer of propylene containing 3% or less of derived units of ethylene or C4-C10 ?-olefin(s) or of combinations thereof, said homopolymer or copolymer having a content of isotactic pentads (mmmm), measured by 13C NMR on the fraction insoluble in xylene at 25° C., higher than 96; a2) from 10% to 80%, of a copolymer of ethylene containing from 40% to 70% of derived units of propylene or C4-C10 ?-olefin(s) or of combinations thereof; B) from 10% to 70% by weight of a multimodal ethylene copolymer wherein the comonomer is selected from the derived units of alpha olefins of formula CH2?CHT wherein T is a C3-C10 alkyl group; having the following properties: i) density (with ISO 1183) comprised in the range from 0.850 to 0.