Abstract: Polymer composition showing an improved balance of flexural modulus, IZOD impact strength and elongation at break comprising (percent by weight): A) a polymer blend comprising: A1) 50-70% of a crystalline propylene homopolymer or copolymer; and A2) 30-50% of one or more copolymer(s) of ethylene with one or more C4-C10 ?-olefin(s) containing from 15 to 35% of said C4-C10 ?-olefin(s); said polymer blend (A) having values of MFR equal to or higher than 10 g/10 min., a total content C4-C10 ?-olefin(s) equal to or higher than 8% and an intrinsic viscosity value of the fraction soluble in xylene at room temperature of from 1.3 to 2 dl/g, the amounts of (A1) and (A2) being referred to the total weight of the polymer blend; and optionally B) 1-15% of an elastomeric polymer different from A2), having a hardness (Shore A, ASTM D-2240) value equal to or lower than 90 points; and/or C) 0.5-20% of a mineral filler; the amounts of optional components (B) and (C) being referred to the total weight of the composition.

Abstract: A masterbatch composition comprising (percent by weight): A) 50%-90% of a crystalline polypropylene component comprising: AI) from 25% to 75% of a fraction having a melt flow rate MFRI of from 0.1 to 10 g/10 min.; and AII) from 75% to 25% of a fraction having a melt flow rate value MFRII equal to or lower than 100 g/10 min.; wherein the ratio MFRI/MFRII is from 5 to 60; and B) 10%-50% of a copolymer component of ethylene and at least one C3-C10 ?-olefin, containing from 15% to 50% of ethylene; said masterbatch composition having a value of the intrinsic viscosity [?] of the fraction soluble in xylene at room temperature equal to or higher than 3.5 dl/g, is added to polyolefin materials to obtain final compositions suitable for injection molding.

Abstract: The present invention relates to butene-1 copolymers containing up to 40% by mol of ethylene and/or propylene derived units characterized by the following properties: d) Product of the reactivity ratios r1·r2?2; e) Content of butene-1 units in form of isotactic pentads (mmmm)>98%; and f) absence of 4,1 insertions of butene units.

Abstract: The present invention relates to butene-1 copolymers containing up to 40% by mol of ethylene and/or propylene derived characterized by the following properties: d) Product of the reactivity ratios r1·r2?2; e) Content of butene-1 units in form of isotactic pentads (mmmm)>98%; and f) absence of 4,1 insertions of butene units.

Abstract: A masterbatch composition comprising (percent by weight): A) 15%-50% of a polypropylene component having a melt flow rate of from 1 to 250 g/10 min.; and B) 50%-85% of an olefin polymer partially soluble in xylene at room temperature, containing from 60% to 85% by weight of ethylene; said masterbatch composition having (i) a value of the intrinsic viscosity [?] of the fraction soluble in xylene at room temperature ([?]sol) equal to or lower than 2.9 dl/g, and (ii) a value of the ratio MFR/[?], , , , equal to or lower than 4, is added to polyolefin materials to obtain final compositions suitable for injection molding.

Abstract: A polyolefin composition comprising (percentage by weight): (A) from 60 to 85% of a broad molecular weight distribution propylene polymer (component A) having a polydispersity index from 5 to 15 and melt flow rate of from 20 to 78 g/10 min (according to ASTM-D 1238, condition L); and (B) from 15 to 40% of a partially xylene-soluble olefin polymer rubber (component B) containing at least 65% by weight of ethylene. Said composition finds application in automotive field.

Abstract: A polyolefin composition comprising: (A) from 8 to 25% by weight of a crystalline homopolymer or copolymer of propylene: (B) from 75 to 92% by weight of an elastomeric fraction comprising: (1) a first elastomeric copolymer of propylene with from 15 to 32% by weight at least one alpha-olefin of formula H2C?CHR, where R is H or a C2-6 linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, said first elastomeric copolymer containing alpha-olefin, and having solubility in xylene at room temperature greater than 50% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 3.0 to 5.0 dl/g; and (2) a second elastomeric copolymer of propylene with at least one alpha-olefin of formula H2C?CHR, where R is H or a C2-6 linear or branched alkyl, optionally containing 0.

Abstract: Propylene polymer compositions comprising (by weight): A) from 15% to 60% with C4-C8 alpha-olefin(s), containing more than 10%, but less than 14%, of said C4-C8 alpha-olefins (s); B) from 40% to 85% of a copolymer of propylene with C4-C8 alpha-olefin(s), preferably butene, containing from 14% to 30% of said C4-C8 alpha-olefin(s), and optionally from 0.5% to 3% of ethylene; provided that the total content of C4-C8 alpha-olefin(s) in the propylene polymer composition be higher than 10%.

Abstract: An isotactic 1-butene copolymer having a content up to 30% by mol of at least one alpha-olefin of formula CH2?CHZ derived units, wherein Z is a C3-C20 hydrocarbon group, having the following features: isotactic pentads (mmmm) >90%; and a percentage of soluble fraction in diethylether (% SD) and a molar content of said alpha olefins (% O) in the polymer chain meeting the following relation: % SD>2.8% O+8.

Abstract: A process comprising contacting 1-butene and one or more alpha-olefins under polymerization conditions in the presence of a catalyst system obtainable by contacting: (A) a metallocene compound of formula (I) wherein: M is an atom of a transition metal; p is an integer from 0 to 3; X, same or different, are hydrogen atoms, halogen atoms, or an hydrocarbon group; L is a divalent bridging group; R1 and R3 are hydrocarbon groups; R2 and R4 are hydrogen atoms or hydrocarbon groups; T1 and T2, equal to or different from each other are a moiety of formula (II), (III) or (IV): wherein: R5, R6, R7, R8 and R9, equal to or different from each other, are hydrogen or hydrocarbon groups; and (B) an alumoxane or a compound able to form an alkylmetallocene cation.

Abstract: An isotactic 1-butene copolymer having a content up to 30% by mol of at least one alpha-olefin of formula CH2?CHZ derived units, wherein Z is a C3-C20 hydrocarbon group, having the following features: isotactic pentads (mmmm) >90%; and a percentage of soluble fraction in diethylether (% SD) and a molar content of said alpha olefins (% O) in the polymer chain meeting the following relation: % SD>2.8% O+8.

Abstract: Polymer composition showing an improved balance of flexural modulus, IZOD impact strength and elongation at break comprising (percent by weight): A) a polymer blend comprising: A1) 50-70% of a crystalline propylene homopolymer or copolymer; and A2) 30-50% of one or more copolymer(s) of ethylene with one or more C4-C10 ?-olefin(s) containing from 15 to 35% of said C4-C10 ?-olefin(s); said polymer blend (A) having values of MFR equal to or higher than 10 g/10 min., a total content C4-C10 ?-olefin(s) equal to or higher than 8% and an intrinsic viscosity value of the fraction soluble in xylene at room temperature of from 1.3 to 2 dl/g, the amounts of (A1) and (A2) being referred to the total weight of the polymer blend; and optionally B) 1-15% of an elastomeric polymer different from A2), having a hardness (Shore A, ASTM D-2240) value equal to or lower than 90 points; and/or C) 0.5-20% of a mineral filler; the amounts of optional components (B) and (C) being referred to the total weight of the composition.

Abstract: A masterbatch composition comprising (1) 10-50 wt % of a crystalline propylene homopolymer and (2) 50-90 wt % of a blend consisting of (a) a copolymer of ethylene and one or more C4-CIO a-olefin(s), containing 10-40 of C4-CIO a-olefin(s), and (b) an amorphous copolymer of propylene and ethylene. Copolymer (b) has an ethylene content from 20-70 wt %, and an intrinsic viscosity value of the xylene-soluble moiety of from 2.2 to 3.5 d/Lg, this value being equal to 0.8 to 1.2 times the intrinsic viscosity value of the xylene-soluble moiety of copolymer (a). The weight ratio of copolymers (a)/(b) is from 3/1 to 1/3. Polyolefin compositions comprising the said masterbatch composition are suitable for the manufacture of automotive parts.

Abstract: A masterbatch composition comprising (percent by weight): A) 15%-50% of a polypropylene component having a melt flow rate of from 1 to 250 g/10 min.; and B) 50%-85% of an olefin polymer partially soluble in xylene at room temperature, containing from 60% to 85% by weight of ethylene; said masterbatch composition having (i) a value of the intrinsic viscosity [?] of the fraction soluble in xylene at room temperature ([?]sol) equal to or lower than 2.9 dl/g, and (ii) a value of the ratio MFR/[?]sol equal to or lower than 4, is added to polyolefin materials to obtain final compositions suitable for injection molding.

Abstract: A polyolefin composition comprising (percentage by weight): (A) from 60 to 85% of a broad molecular weight distribution propylene polymer (component A) having a polydispersity index from 5 to 15 and melt flow rate of from 20 to 78 g/10 min (according to ASTM-D 1238, condition L); and (B) from 15 to 40% of a partially xylene-soluble olefin polymer rubber (component B) containing at least 65% by weight of ethylene. Said composition finds application in automotive field.

Abstract: The present invention relates to butene-1 copolymers containing up to 40% by mol of ethylene and/or propylene derived characterized by the following properties: d) Product of the reactivity ratios r1·r2?; e) Content of butene-1 units in form of isotactic pentads (mmmm)>98%; and f) absence of 4,1 insertions of butene units.

Abstract: A process for preparing isotactic 1-butene copolymers containing up to 30% by mol of units derived from of one or more alpha olefins of formula CH2?CHZ, wherein Z is a C3C20 hydrocarbon group comprising contacting 1-butene and one or more of said alphaolefins under polymerization conditions in the presence of a catalyst system obtainable by contacting: (A) a metallocene compound of formula (I) (1) wherein: M is an atom of a transition metal; p is an integer from 0 to 3; X, same or different, are hydrogen atoms, halogen atoms, or an hydrocarbon group; L is a divalent bridging group; R1 and R3 are hydrocarbon groups; R2 and R4 are hydrogen atoms or hydrocarbon groups; T1 and T2, equal to or different from each other are a moiety of formula (II), (III) or (IV): wherein: the atom marked with the symbol * is bound the atom marked with the same symbol in formula (I); R5, R6, R7, R8 and R9, equal to or different from each other, are hydrogen or hydrocarbon groups; and (B) an alumoxane or a compound able to form an a

Abstract: Highly transparent and flexible elastoplastic polyolefin compositions which contain A) 10-20 parts by weight of a propylene homopolymer or copolymer with ethylene and/or one or more CH2?CHR ?-olefins, the copolymer containing at least 95% by weight of propylene; B) 5-20 parts by weight of propylene copolymer fraction containing ethylene and insoluble in xylene at room temperature; and C) 60-80 parts by weight of a propylene copolymer fraction containing a comonomer selected from ethylene and mixtures of ethylene with one or more CH2?CHR ?-olefin and soluble in xylene at room temperature, the fraction containing from 15 to 25% by weight of the comonomer, the percent by weight of the sum of the B and C components with respect to the total polyolefin composition being from 80% to 90%.

Abstract: A masterbatch composition comprising (1) 10-50 wt % of a crystalline propylene homopolymer and (2) 50-90 wt % of a blend consisting of (a) a copolymer of ethylene and one or more C4-CIO a-olefin(s), containing 10-40 of C4-CIO a-olefin(s), and (b) an amorphous copolymer of propylene and ethylene. Copolymer (b) has an ethylene content from 20-70 wt %, and an intrinsic viscosity value of the xylene-soluble moiety of from 2.2 to 3.5 d/Lg, this value being equal to 0.8 to 1.2 times the intrinsic viscosity value of the xylene-soluble moiety of copolymer (a). The weight ratio of copolymers (a)/(b) is from 3/1 to 1/3. Polyolefin compositions comprising the said masterbatch composition are suitable for the manufacture of automotive parts.

Abstract: A polyolefin composition comprising: (A) from 8 to 25% by weight of a crystalline homopolymer or copolymer of propylene: (B) from 75 to 92% by weight of an elastomeric fraction comprising: (1) a first elastomeric copolymer of propylene with from 15 to 32% by weight at least one alpha-olefin of formula H2C═CHR, where R is H or a C2-6 linear or branched alkyl, optionally containing 0.5 to 5% by weight of a diene, said first elastomeric copolymer containing alpha-olefin, and having solubility in xylene at room temperature greater than 50% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 3.0 to 5.0 dl/g; and (2) a second elastomeric copolymer of propylene with at least one alpha-olefin of formula H2C═CHR, where R is H or a C2-6 linear or branched alkyl, optionally containing 0.