Patent
Catalyst components for the polymerization of olefins
Morini Giampiero,Isabella Maria Vittoria Camurati,Tiziano Dall'occo,Dario Liguori,Gianni Vitale +4 more
TLDR
In this article, the ORI/Ti molar ratio in the range 0.1-1.5 was used for the polymerization of MWD crystalline ethylene polymers.Abstract:
Catalyst components for the(co)polymerization of ethylene comprising Ti, Mg, halogen, ORI groups, where RI is a C1-C12 hydrocarbon group optionally containing heteroatoms, having ORI/Ti molar ratio in the range 0.1-1.5, a Mg/Ti molar ratio of less than 8, an amount of titanium, with respect to the total weight of said solid catalyst component, higher than 4% by weight characterized by a specific SS-NMR pattern are particularly useful for preparing narrow MWD crystalline ethylene polymers.read more
Citations
More filters
Patent
Polyolefin adhesive compositions and articles made therefrom
Ramin Abhari,Charles L. Sims,Kenneth Lewtas,Mun Fu Tse,Patrick Brant,Peijun Jiang,Wai Yan Chow,Jean-Roch Schauder,Caiguo Gong,David R. Johnsrud,Jo Ann M. Canich +10 more
TL;DR: In this paper, a tackifier was added to an olefin polymer and the Gardner color of the adhesive did not change by more than 7 Gardner units when the adhesive has been heat aged at 180°C. for 48 hours as compared to the Gardner colour of the unaged composition.
Patent
Multiple catalyst system for olefin polymerization and polymers produced therefrom
Peijun Jiang,Armenag H. Dekmezian,Jo Ann M. Canich,Charles L. Sims,Ramin Abhari,Cesar A. Garcia-Franco,David R. Johnsrud +6 more
TL;DR: In this paper, a branching index (g') of 0.95 or less measured at the Mz of the polymer was defined, and the ratio of the first catalyst to the second catalyst is from 1:1 to 50:1, where at least 20% of the olefins are converted to polymer.
Patent
Functionalized olefin polymers
TL;DR: In this paper, a functionalized C3 to C40 olefin polymers with a branching index of 0.95 or less is defined, where the Olefin polymer has at least 0.001 weight % of an functional group, preferably maleic anhydride.
Patent
Impact Resistant Polyolefin Compositions
Paola Massari,Marco Ciarafoni +1 more
TL;DR: In this article, the authors present a characterization of the ethylene content of a copolymer with a temperature rising elution fractionation (Tthis article) profile, obtained by fractionation in xylene and collection of fractions at temperatures of 40 °C, 80°C and 90 °C.
Patent
Solid catalyst component for olefin polymerization and catalyst
TL;DR: A solid catalyst component for olefin polymerization which is prepared through contact among a magnesium compound, a titanium compound, and an electron-donating compound has a parameter, S1/S2, determined by Raman spectrometry of 0.5 to 10 as mentioned in this paper.
References
More filters
Patent
Components and catalysts for the polymerization of olefins
TL;DR: The catalysts obtained from the components of the invention are particularly suitable for gas-phase polymerization processes as discussed by the authors, and are used for gas phase polymerization of olefins.
Patent
Process and catalyst for polyolefin density and molecular weight control
TL;DR: In this article, derivatives of mono, bi and tricyclopentadienyl coordination complexes with a transition metal and an alumoxane are employed in a process of producing polyolefins of controlled molecular weight.
Patent
Catalysts for the polymerization of olefins
TL;DR: In this paper, the new catalysts are obtained by mixing a hydride or organometallic compound of a metal belonging to Groups I to III of the Mendelyeev Periodic System with the product obtained by contacting a titanium tetrahalide with a support comprising an anhydrous magnesium or zinc halide in an active form, under particular conditions.
Patent
Process for the preparation of polyolefins
TL;DR: In this paper, a process for the preparation of polyolefins by polymerizing olefins of the formula CH2CHR in which R = H or C1-C10 alkyl, on their own or as a mixture, if appropriate together with C4-C12.alpha.,m-diolefiners in solvents, liquid monomers or the gas phase, at tempera-tures between -50 and 200°C, using a catalyst system composed of a soluble, halogen-containing transition metal compound of the general formula (
Patent
Catalyst components and catalysts for the polymerization of alpha-olefins
TL;DR: In this article, the catalysts for the polymerization of olefins are defined as the solid product of the reaction of a halogenated Ti-compound and of an eiectron-donor compound not containing active H atoms.