Abstract:
A mixture comprising: T1) from 99 wt% to 75 wt% of bitumen, and T2) from 1 wt% to 25 wt% of polymer composition comprising the following components, A) 5-35% by weight of a propylene ethylene copolymer; B) 20-50% by weight; of an ethylene homopolymer; and C) 30-60% by weight of a terpolymer of ethylene, propylene and 1 -butene derived units.
Abstract:
Cable insulation or jacketing comprising: from 20.0 wt% to 80.0 wt% of component T1) being an interpolymer of ethylene and less than 7 wt%, of one or more polymerizable comonomers; from 0.5 wt% to 5.0 wt% of a peroxide; from 20.0 wt% to 80.0 wt% of component T2) comprising A) 5-35% by weight of a propylene homopolymer or a propylene ethylene copolymer; B) 25-50% by weight; of a copolymer of ethylene and a C 3 -C 8 alpha-olefin containing from 0.1% to 20% by weight of alpha-olefin units; and C) 30-60% by weight of a copolymer of ethylene and propylene containing from 25% to 75% by weight of ethylene units.
Abstract:
Propylene terpolymers are prepared by polymerizing propylene, ethylene and an alpha-olefin selected from the group of C4-C8 alpha-olefins in the presence of a catalyst system obtained by contacting a solid catalyst component comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being present in an amount from 40 to 90% by mol with respect to the total amount of donors and selected from succinates and the other selected from 1,3 diethers, an aluminum hydrocarbyl compound, and optionally an external electron donor compound.
Abstract:
A propylene composition comprising (percent by weight): A) 70%-95%, of a propylene homopolymer having a Polydispersity Index (P.I.) value of from 4.6 to 10, a fraction insoluble in xylene at 25 °C, higher than 90 %, and MFR L (Melt Flow Rate according to ISO 1133, condition L, i.e. 230°C and 2.16 kg load) from 60 to 120 g/10 min; B) 5%-30%, of a copolymer of propylene containing from 34.5% to 30.0% extremes included of ethylene derived units; the composition having an intrinsic viscosity of the fraction soluble in xylene at 25 °C comprised between 3 and 5 dl/g.
Abstract:
Polyolefin composition, comprising in percent by weight: 1) 75-85% of a copolymer of propylene, said copolymer containing up to 15% by weight, of ethylene and/or C 4 -C 10 α-olefin(s) and having a fraction soluble in Xilene at room temperature lower than 6% by weight, and 2) 15-25% of a copolymer of ethylene with one or more C 4 -C 10 α-olefin(s) containing from 10 to 25% by weight of said C 4 -C 10 α-olefin(s); said composition having the value of MFR, measured at 230 °C, 2.16 kg, of less than 2.5 g/10 min, the total content of ethylene of from 14 to 22 % by weight, the total content Of C 4 -C 10 α-olefin(s) of less than 4.5% by weight, the ratio of the total content of ethylene to the total content of C 4 -C 10 α-olefin(s) equal to or higher than 4, the value of the intrinsic viscosity of the total fraction soluble in xylene at room temperature equal to or less than 1.5 dl/g, and the ratio of the amount of component 2) and the amount Of C 4 -C 10 α-olefin(s) in component 2) equal to or higher than 0.80.
Abstract:
Disclosed is a method for improving softness of an heterophasic polyolefin composition and a polyolefin composition comprising: (I) 50-95% by weight of an heterophasic polyolefin composition comprising: (A) 10-40% by weight of a propylene polymer selected from propylene homopolymers or copolymers of propylene with at least one alpha-olefin of formula CH2=CHR where R is H or a linear or branched C2-C8 alkyl, the copolymer comprising 1.0-6.0% by weight of units deriving from the alpha-olefin and having melt flow rate (MFRA) measured according to ISO 1133, 230°C, 2.16 kg ranging from 20 to 60 g/10 min.; and (B) 60-90% by weight of a copolymer of propylene with at least one alpha-olefin of formula CH2=CHR, and optionally a diene, where R is H or a linear or branched C2-C8 alkyl and wherein the copolymer comprises 20-35% by weight of units deriving from the alpha-olefin, wherein the fraction of the heterophasic polyolefin composition (I) soluble in xylene at 25°C (XS(I)) is equal to or higher than 60% by weight, the amounts of (A), (B) and XS(I) being based on the total weight of (A)+(B); and (II) 5-50 % by weight of a propylene-ethylene copolymer comprising 12-25% by weight of units deriving from ethylene.
Abstract:
A mixture comprising: T1) from 99 wt% to 75 wt% of bitumen, and T2) from 1 wt% to 25 wt% of polymer composition comprising the following components, A) 5-35% by weight of a propylene homopolymer or a propylene ethylene copolymer; B) 20-50% by weight; of a copolymer of ethylene and a C 3 -C 8 alpha-olefin containing from 1.0 % to 20.0 % by weight of alpha-olefin units; and C) 30-60% by weight of a copolymer of ethylene and propylene containing from 25.0 % to 75.0 % by weight of ethylene derived units.
Abstract:
Highly filled polyolefin compositions with improved balance of properties particularly for applications where puncture and tear resistance is requested comprising a flexible heterophasic polyolefin composition (I), consisting of a crystalline polymer fraction (A) consisting of a copolymer of propylene with ethylene having a fraction insoluble in xylene at 25°C of at least 90% by weight, and an elastomeric fraction (B) consisting of a copolymer or blend of copolymers of ethylene with propylene; said copolymer or blend containing units derived from ethylene in a quantity lower than 40% by weight. The fraction soluble in xylene at 25°C of said polyolefin composition having IVgpc lower than 2.5 dl/g, and a broad molecular weight distribution Mw/Mn (GPC) equal to or higher than 4, Mz/Mw (GPC) equal to or higher than 2.5.The filled polyolefin composition is further comprising of an inorganic filler (II) and a butene-1 copolymer having: flexural modulus (ISO 178) lower than 60 MPa, Shore A (ISO 868) lower than 90 and Tg (DMTA) lower than -20°C.
Abstract:
Propylene polymer compositions comprising: A) from 70 wt% to 95 wt%, of a random copolymer of propylene with ethylene, containing from 1.5 wt% to 4.5 wt%, of ethylene derived units, having a content of fraction insoluble in xylene at 25°C of not less than 93%; B) from 5 wt% to 35 wt%, of a copolymer of propylene with ethylene, containing from 7.0 wt% to 17.0 wt % of ethylene derived units; the sum A+B being 100; wherein the melt flow rate, MFR.(Melt Flow Rate according to ASTM 1238, condition L, i.e. 230°C and 2.16 kg load) ranges from 40 g/10 min and 130 g /10 min; and wherein the relation (I) is fulfilled: 10
Abstract:
A propylene composition comprising (percent by weight): A) 70%-95%, of a propylene homopolymer having a Polydispersity Index (P.I.) value of from 4.6 to 10, a fraction insoluble in xylene at 25°C, higher than 90 %, and MFR L (Melt Flow Rate according to ISO 1133, condition L, i.e. 230°C and 2.16 kg load) from 100 to 250 g/10 min; B) 5%-30%, of a copolymer of propylene containing from 36% to 44% of ethylene derived units; the composition having an intrinsic viscosity of the fraction soluble in xylene at 25°C comprised between 3 and 5 dl/g.