Abstract:
Sterilisable articles for use in healthcare or medical applications, such as blow-fill-seal applications, made of a propylene-ethylene random copolymer show good optical properties also after heat sterilization.
Abstract:
A container comprising a propylene, ethylene, 1-hexene terpolymer wherein in the terpolymer: (i) the content of ethylene derived units ranges from 0.5 wt% to 2.0 wt%; (ii) the content of 1-hexene derived units ranges from 1.5 wt% to 5.5 wt%; (iii) the content of ethylene derived units fulfills the following equation (I); C2
Abstract:
A polyolefin composition, particularly fit for the production of extrusion blow molded articles, comprising (a) a propylene-ethylene copolymer having a content of units deriving from ethylene of 4.0 % by weight or higher, and (b) a nucleating agent and having a crystallization temperature (Tc) higher than 117°C can be obtained by copolymerizing propylene and ethylene 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 process and apparatus for producing olefin polymers are disclosed, comprising: a. polymerizing one or more olefins in the gas phase, in the presence of an olefin polymerization catalyst, whereby growing polymer particles flow along a cylindrically- shaped downward path in densified form under the action of gravity so as to form a densified bed of downward-flowing polymer particles b. allowing said polymer particles to flow through a restriction of the densified bed, such restriction being positioned in a restriction zone extending from the bed upward to a distance of 15% of the total height of the densified bed; and c. metering an antistatic agent through a feed line connected to the densified bed at a feed point being located in a feed zone extending from the top of the restriction upward, to a distance five times the diameter of the section of the densified bed above the restriction.
Abstract:
A terpolymer containing propylene, ethylene and an alpha olefins of formula CH2=CHZ wherein Z is an hydrocarbon group having from 2 to 10 carbon atoms wherein: (i) the content of ethylene derived units ranges from 0.5 wt% to 5.0 wt%; (ii) the content of alpha olefin derived units ranges from 1.0 wt% to 5.0 wt%; (iii) the area of the DSC curve after the peak of the melting point (Tm) represents more than 22%; of the total area of the DSC curve; (iv) the polydispersity index (PI) ranges from 2.0 to 7.0.
Abstract:
A propylene composition comprising (percent by weight): A) 60%-90%, of a crystalline propylene copolymer containing from 3.5% to 10% of ethylene derived units and having a melting temperature Tm (measured by DSC on the as-reactor polymer) ranging from 146° to 160°C; B) 10%-40%, of a copolymer of propylene containing from 15% to 30%, of ethylene derived units.
Abstract:
1 -butene/ethylene/propylene terpolymer containing: c) from 4 to 10 wt% of ethylene derived units, and d) from 2 tol0wt% of propylene derived units; the said terpolymer having the following properties: - distribution of molecular weights (Mw/Mn) measured by GPC lower than 3; - no melting point detectable at the DSC; - melting enthalpy, measured after 10 days of aging at room temperature, from 12 to 20 J/g
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 process for the preparation of polyolefins carried out in the presence of an antistatic composition comprising: a) a compound of formula R-OH wherein R represents hydrogen or a linear or branched, saturated alkyl group having from 1 to 15 carbon atoms; and b) an oligomeric or polymeric organic compound having one or more terminal hydroxyl groups and a viscosity at 40 °C of at least 20 mm 2 /sec (DIN 51562).
Abstract:
A propylene ethylene copolymer characterized by the following features: ethylene content of between 1.8 and 10.0% by weight; molecular weight distribution (MWD), expressed in terms of Mw/Mn, greater than 4.0; the content of xylene soluble fraction (XS) and ethylene content (C2) fulfill the following relation: XS