Abstract:
A polypropylene composition comprising: from 70 wt% to 90 wt% of a propylene 1-hexene copolymer containing from 1.0 wt% to 5.0 wt% of 1-hexene derived units and a polydispersity index (PI) comprised between 9.2 and 21.3; from 10 wt% to 30 wt%, of a copolymer of propylene and ethylene containing from 45.0 wt% to 65.0 wt%, of ethylene derived units; the sum A) + B) being 100.
Abstract:
A propylene polymer composition comprising: a) from 15 wt% to 35 wt% of a propylene 1-hexene copolymer containing from 6.2 to 8.5 % by weight, of 1-hexene derived units having a Melt Flowrate from 3.5 to 8.5 g/10 min; b) from 15 wt% to 35 wt% of a propylene 1-hexene copolymer containing from 10.4 wt% to 14.5 wt%, of 1-hexene derived units having a Melt Flow Rate from 3.5 to 8.5 g/10 min; c) from 38 wt% to 68 wt% of a propylene ethylene copolymer containing from 3.4 wt% to 5.7 wt% of ethylene derived units, a having a Melt Flow Rate from 3.5 to 12.0 g/10 min; the sum of the amount of a), b) and c) being 100.
Abstract:
A propylene 1-hexene copolymer containing from 5.5 to 9.0% by weight, of 1-hexene derived units having: a) two peaks in the DSC plot having a difference in height ranging from 0 to 5 mW; b) the higher melting temperature, measured by DSC, ranging from 141.0 °C to 151.0 °C; c) Melt Flow Rate (MFR, measured according to ASTM D 1238, 230°C/2.16 kg, from 3.5 to 8.0 g/10 min.
Abstract translation:包含5.5至9.0重量%的1-己烯衍生单元的丙烯1-己烯共聚物具有:a)DSC曲线中的两个峰,其高度差为0至5mW ; b)由DSC测得的较高熔化温度范围为141.0℃至151.0℃; c)熔体流动速率(MFR,根据ASTM D 1238,230℃/ 2.16kg,3.5至8.0g / 10min测量)
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:
Polyolefin compositions particularly suitable for cast film, exhibiting heat sealability, retortability, low haze and stiffness, comprising: 1) 75-85% of a propylene homopolymer or copolymer of propylene with ethylene and/or one or more C 4 -C 10 α-olefin(s), the homopolymer or copolymer having melting temperature equal to or higher than 150°C, 2) 15-25% of a copolymer of ethylene with one or more C 4 -C 10 α-olefin(s) containing from 20 to 30% of said C 4 -C 10 α-olefin(s); said composition having MFR (at 230°C, 2.16 kg) of from 5-10 g/10 min, the total content of ethylene of from 10 to 20 %, the total content of C 4 -C 10 α-olefin(s) of from 2 to 8 %, the ratio XStot/XSm of the total fraction soluble in Xylene at room temperature to the fraction soluble in Xylene at room temperature of the matrix component (1) of from 5 to 15, and the value of the intrinsic viscosity of the total fraction soluble in Xylene at room temperature (XSIVtot) of 1.5 dl/g or less.
Abstract:
A process for the preparation of propylene polymer compositions carried out in the presence of a catalyst system comprising (a) a solid catalyst component having average particle size ranging from 15 to 80 μm 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 50 to 90% by mol with respect to the total amount of donors and selected from succinates and the other being selected from 1,3 diethers, (b) an aluminum alkyl and optionally (c) an external electron donor compound, and comprising the following steps: (i) contacting the catalyst components (a), (b) and optionally (c); (ii) pre -polymerizing up to forming amounts of polymer from about 0.1 up to about 1000 g per gram of solid catalyst component (a); (iii)polymerizing propylene producing a propylene (co)polymer being for at least 85% by weight of insoluble in xylene at 25°C and (iv)in a successive step, carried out in gas-phase, polymerizing mixtures of ethylene with α-olefϊns CH 2 =CHR in which R is a hydrocarbon radical having 1-10 carbon atoms, to produce the said ethylene copolymer.
Abstract:
A masterbatch composition comprising: 70-90 %wt of a component (A) being a propylene homopolymer or copolymer of propylene with ethylene or C 4 -C 10 alpha olefins, having a MFR A according to ISO 1133 (230°C/2.16 Kg) ranging from 15 to 70 g/10 min; and 10-30 %wt of a component B) being a propylene-ethylene copolymer comprising 25-45 %wt of ethylene derived units and having a value of the intrinsic viscosity [η] of the fraction soluble in xylene at room temperature ranging from 5 to 9 dl/g, said masterbatch composition having a total MFR higher than 4 g/10 min, and a value of the fiexural modulus measured according to ISO method 178 ranging from 950 to 2000 MPa.
Abstract:
Random propylene/ethylene copolymers are provided characterized by Ethylene content in the range of 4.5-7%wt; Mw/Mn (via GPC) in the range 3.5-5.5; Mz/Mw (via GPC) lower than 4; absence of 2-1 regioinversion, and Melting Temperature (Tm) (non-nucleated grade) lower than 143°C. The said copolymers show an excellent balance of impact and optical properties which is retained even after visbreaking.
Abstract:
A polypropylene composition comprising: A) from 71 wt% to 91 wt% of a propylene homopolymer B) from 5 wt% to 15 wt%, of a copolymer of propylene and ethylene containing from 18 wt% to 32.0 wt%, of ethylene derived units; C) from 4 wt% to 15 wt%, of a copolymer of propylene and ethylene containing from 75 wt% to 90.0 wt%, of ethylene derived units.
Abstract:
A propylene polymer composition comprising: a) from 35 wt% to 65 wt% of a propylene 1-hexene copolymer containing from 10.5 to 13.0% by weight, of 1-hexene derived units having a Melt Flow Rate (MFR, measured according to ASTM D 1238, 230°C/2.16 kg, i.e. at 230°C, with a load of 2.16 kg) from 3.5 to 12.0 g/10 min; b) from 35 wt% to 65 wt% of a propylene ethylene copolymer containing from 1.5 wt% to 6.wt% of ethylene derived units, a having a Melt Flow Rate (MFR, measured according to ASTM D 1238, 230°C/2.16 kg, i.e. at 230°C, with a load of 2.16 kg) from 3.5 to 12.0 g/10 min.