摘要:
Films or sheets of polypropylene, particularly biaxially oriented polypropylene (BOPP) films, exhibiting excellent physical and mechanical properties combined with good processing characteristics can be prepared from propylene polymers prepared in the presence of Ziegler-Natta catalysts comprising a succinate and a diether compound.
摘要:
A heterophasic polypropylene composition comprising (percent by weight referred to the sum of components A) and B)): A) from 80% to 97% of a random copolymer of propylene containing from 0.1 to 4% of 1-hexene derived units; B) from 3-20% of a copolymer of propylene and ethylene having a content of ethylene derived units ranging from 50% to 55% extremes excluded; wherein the heterophasic polypropylene composition is endowed with a Melt Flow Rate: measured according to ISO 1133 (230° C., 5 Kg) ranging from 0.5 to 5 g/10 min; and an intrinsic viscosity (IV) of the fraction soluble in xylene at room temperature ranging from 2.5 to 5.5.
摘要:
A propylene/ethylene/1-hexene terpolymer containing from 1.0 wt % to 2.5 wt %, of ethylene derived units and from 2.0 wt % to 4.0 wt % of 1-hexene derived units, the sum of the amounts of propylene, ethylene and 1-.hexene derived units being 100, having the following features: a) the amount (Wt %) of 1-hexene (C6) and the amount (Wt %) of ethylene (C2) fulfill the following relation: C2
摘要:
A polyolefin composition comprising (percent by weight): A) from 7% to 19%; of a copolymer of propylene and 1-hexene wherein said copolymer contains less than 1% of recurring units derived from hexene-1; B) from 81% to 93% of a heterophasic polypropylene composition comprising: B1) from 86% to 95% of a propylene homopolymer, said propylene polymer being insoluble in xylene at room temperature in an amount over 85% having a polydispersity Index ranging from 3 to 10; and a Melt Index from 0.5 to 10 dg/min; B2) from 5% to 14% of a copolymer of ethylene and propylene having an ethylene derived units content ranging from 50% to 65%; said polymeric composition having a Melt Index from 0.05 to 10 dg/min.
摘要:
A heterophasic polypropylene composition comprising (percent by weight referred to the sum of components A) and B)): A) from 80% to 97% of a random copolymer of propylene containing from 0.1 to 4% of 1-hexene derived units; B) from 3-20% of a copolymer of propylene and ethylene having a content of ethylene derived units ranging from 50% to 55% extremes excluded; wherein the heterophasic polypropylene composition is endowed with a Melt Flow Rate: measured according to ISO 1133 (230° C., 5 Kg) ranging from 0.5 to 5 g/10 min; and an intrinsic viscosity (IV) of the fraction soluble in xylene at room temperature ranging from 2.5 to 5.5;
摘要:
A polypropylene composition for injection-molded drainage systems comprising 78-84 wt % of a crystalline propylene polymer, 8 to less than 13 wt % of an elastomeric copolymer and 8 to less than 13 wt % of polyethylene. The said composition exhibits a flexural modulus value higher than 1400 MPa, a melt flow rate (MFR), determined according to ISO method 1133 (230° C. and 2.16 kg), of from 1.5 to 5.0 g/10 min, and a value of Izod impact resistance at 0° C. of more than 6 kJ/m2 according to ISO method 180/1A.
摘要翻译:一种用于注射成型的排水系统的聚丙烯组合物,其包含78-84重量%的结晶丙烯聚合物,8至小于13重量%的弹性体共聚物和8至小于13重量%的聚乙烯。 所述组合物显示高于1400MPa的挠曲模量值,根据ISO方法1133(230℃和2.16kg)测定的熔体流动速率(MFR)为1.5至5.0g / 10min,值为 根据ISO方法180 / 1A,0℃下的Izod抗冲击强度大于6kJ / m 2。
摘要:
A propylene polymer composition comprising (percent by weight): A) 74%-84% 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 a MFR L (Melt Flow Rate according to ISO 1133, condition L, i.e. 230° C. and 2.16 kg load) from 110 to 200 g/10 min; B) 16%-26%, of a copolymer of propylene with from 39% to 48%, of ethylene derived units; the composition having an intrinsic viscosity of the fraction soluble in xylene at 25° C. comprised between 2.7 and 4.0 dl/g; and a MFR L (Melt Flow Rate according to ISO 1133, condition L, i.e. 230° C. and 2.16 kg load) from 30 to 80 g/10 min.
摘要:
Films or sheets of polypropylene, particularly biaxially oriented polypropylene (BOPP) films, exhibiting excellent physical and mechanical properties combined with good processing characteristics can be prepared from propylene polymers prepared in the presence of Ziegler-Natta catalysts comprising a succinate and a diether compound.
摘要:
A polyolefin composition for pipes comprising (percent by weight): A) from 1% to 9.5%; of a copolymer of propylene and hexene-1 wherein said copolymer comprises from 0.1 to 5% of recurring units derived from hexene-1; B) from 80.5% to 99% of a heterophasic polypropylene composition comprising: B1) from 50% to 85% of a propylene homopolymer, said propylene polymer being insoluble in xylene at ambient temperature in an amount over 85% having a polydispersity Index ranging from 3 to 10; and a Melt Index from 0.5 to 10 dg/min; B2) from 5% to 50% of a copolymer of ethylene and propylene having an ethylene derived units content ranging from 30% to 70%; said polymeric composition having a Melt Index from 0.05 to 10 dg/min.
摘要:
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-olefins CH2═CHR in which R is a hydrocarbon radical having 1-10 carbon atoms, to produce the said ethylene copolymer.