Abstract:
Use of propylene polymers having Polydispersity Index value P.I.(2) greater than or equal to 15 for the nucleation of polypropylene resins having a Polydispersity Index value P.I.(1) fulfilling the equation P.I.(2)-P.I.(1) ≥ 10.
Abstract:
Compositions of additives for plastics comprising the following components (percent by weight): A) from 1% to 25% of a polyolefÊn matrix comprising one or more polyolefins having a melting point of 160 0C or less, said melting point being determined by differential scanning calorimetry (DSC), according to ISO 11357; B) from 75% to 99% of one or more solid additives for polymers.
Abstract:
A case for valve-regulated lead-acid battery comprising an olefin polymer composition comprising: A) From 60 wt% to 95 wt%, of a propylene homopolymer, or a copoloymer of propylene containing 3% or less of ethylene, said homopolymer or copolymer having a Polydispersity Index (P.I.) value of from 4.6 to 10 and a fraction insoluble in xylene at 25 °C, higher than 98 molar %; and B) from 5 wt% to 40wt %, of a copolymer of propylene and ethylene containing from 30 wt% to 65 wt% of ethylene derived units; the sum A)+B being 100.
Abstract:
Polyolefϊn composition for membrane suitable for use in waterproofing applications. In particular, the present invention relates to a membrane for use in geomembranes, for water containment and conveyance, pool liners, rainstorm and fish pond liners, snow lagoons, water and industrial reservoirs, food related lining etc. Such membrane comprises at least one layer comprising an heterophasic composition of olefin polymers and a specified additives package.
Abstract:
A process for producing a polybutene-1 composition having increased crystallization temperature T c A , comprising the step of blending the following components: A) a butene-1 polymer or polymer composition having crystallization temperature T c A equal to or higher than 50 °C; B) 50 to 3000 ppm by weight, with respect to the total weight of A) and B), of one or more metal complexes of polyhydric alcohols; said butene-1 polymer or polymer composition A) being brought to the molten state or maintained in the molten state during the blending step.
Abstract:
A propylene composition comprising (percent by weight): A) 60%-95%, of a crystalline propylene copolymer containing from 2.0% to 10.0% of ethylene derived units having a melting point ranging from 148°C to 160°C; wherein the melting temperature Tm is measured by DSC on the as-reactor polymer; B) 40%-5%, of a copolymer of ethylene containing from 70% to 85%, of ethylene derived units intrinsic viscosity ranging from 0.8 to 3 dl/g.
Abstract:
Polypropylene compositions, particularly suited for preparation of stretched/oriented articles, especially for injection stretch blow moulded bottles, comprising: A) one or more propylene homopolymers or propylene copolymers or their mixtures; B) from 500 to about 1500 ppm by weight of talc in form of particles having average particle diameter of equal to or less than 1.5 µm. Said compositions display higher crystallization temperature with respect to the same polyolefin (A) without addition of (B), while keeping good levels of transparency, particularly when (A) is or comprises a random polymer.
Abstract:
A process for producing polyolefin articles comprising an ethylene-vinyl alcohol copolymer, wherein the polyolefin component is melted and mixed with the ethylene-vinyl alcohol copolymer in the presence of a stabilizing composition comprising: a) one or more acid scavengers in amounts equal to or higher than 300 ppm by weight with respect to the weight of the polyolefin component; and b) one or more phenolic antioxidants in amounts equal to or higher than 1100 ppm by weight with respect to the weight of the polyolefin component.
Abstract:
A propylene and 1-hexene copolymer containing from 0.5 wt% to less than 5wt% of 1-hexene derived units said copolymer having: a) a melting point higher than 145°C; b) a melt flow rate (MFR2) determined according to ISO method 1133 (230° C, 2.16 kg ranging from 10 dl/10 min to less than 60 dl/10 min; said copolymer being chemically degradated to MFR2 and wherein the ratio MFR2/MFR1 is comprised between 15 and 56; wherein MFR1 is the melt flow rate measured according to ISO method 1133 (230° C, 2.16 kg) of the propylene/1-hexene copolymer before the degradation
Abstract:
A process for producing a polybutene-1 composition having increased crystallization temperature T c A , comprising the step of blending the following components: A) a butene-1 polymer or polymer composition having crystallization temperature T c A equal to or higher than 50 °C; B) 5 to 3000 ppm by weight, with respect to the total weight of A) and B), of one or more metal salts of carboxylic acids containing two or more carboxylic groups bonded to a cyclic or polycyclic aliphatic or aromatic structure; said butene-1 polymer or polymer composition A) being brought to the molten state or maintained in the molten state during the blending step.
Abstract translation:一种生产具有增加的结晶温度T c C的聚丁烯-1组合物的方法,