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公开(公告)号：US20220403064A1
公开(公告)日：2022-12-22
申请号：US17778182
申请日：2020-11-09
摘要： A process (and a related system) for collecting samples of a polymerization catalyst or of a catalyst-containing polymer from an operation unit, having an upper end and a lower end, of a polymerization plant, including the steps of: a) extracting a prefixed amount of product from the lower end of the operation unit through a discharge valve; b) directing the product towards a filtering unit through an inlet valve; c) flushing an inert gas through the filtering unit; d) outgassing the filtering unit, through the outlet valve; and e) displacing the filtering unit, for collecting the sample.
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公开(公告)号：US20220306848A1
公开(公告)日：2022-09-29
申请号：US17616854
申请日：2020-05-18
摘要： A process for preparing fibers made from or containing propylene homopolymer having: a melting point ranging from 150° C. to 164° C.; a fraction soluble in xylene at 25° C. between 6.0 wt % and 2.0 wt %; a fraction soluble in acetone 25° C. between 0.5 wt % and 2.0 wt %; a ratio fraction soluble in xylene at 25° C./fraction soluble in acetone 25° C. between 0.30 and 0.60; a polydispersity index ranging from 2.8 to 4.5; and a melt flow rate (ISO 1133, 230° C./2.16 kg) between 2 to 40 g/10 min.
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公开(公告)号：US11376829B2
公开(公告)日：2022-07-05
申请号：US16971609
申请日：2019-02-13
发明人： Paola Massari , Andrea Felisati , Marco Izzi , Claudio Cavalieri , Davide Tartari , Isabella Maria Vittoria Camurati , Tiziana Caputo
摘要： A multilayer film made from or containing a core layer made from or containing a polypropylene composition made from or containing:
A) from 90 wt % to 50 wt %; of a propylene homopolymer; and
B) from 10 wt % to 50 wt %; of a propylene ethylene copolymer having: i) xylene soluble fraction at 25° C. ranging from 14 wt % to 27 wt %; ii) intrinsic viscosity of the fraction soluble in xylene at 25° C. ranging from 1.0 to 2.4 dl/g; iii) melt flow rate ranging from 1.0 g/10 min to 4.0 g/10 min; iv) an ethylene content ranging from 5.0 wt % to 12.0 wt %; v) the ethylene derived units content on the fraction insoluble in xylene at 25° C. ranging from 2.5 wt % to 6.0 wt %; vi) the ethylene derived units content on the fraction soluble in xylene at 25° C. ranging from 15.2. wt % to 30.2 wt %, the sum of A) and B) being 100 wt %.-
公开(公告)号：US20220072499A1
公开(公告)日：2022-03-10
申请号：US17424382
申请日：2020-01-21
摘要： A method for monitoring and controlling the polymerization in a polymerization vessel by using a camera viewing unit to (a) detect features of the polymer particles, or the particles' environment, (b) compare the features to pre-defined acceptable values of these features or the environment, and (c) if a variation from the pre-defined values is detected, act on process parameters to reduce or eliminate the variation.
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公开(公告)号：US20220056174A1
公开(公告)日：2022-02-24
申请号：US17298812
申请日：2019-11-26
发明人： DIEGO BRITA , CLAUDIO CAVALIERI
摘要： A process for the preparation of a propylene polymer containing a coloring agent in an amount ranging from 0.2 to 30 ppm referred to the weight of propylene polymer, including the steps of: a) providing a solid ZN catalyst component made from or containing Mg, Ti, halogen and an internal electron donor compound, wherein the Ti being in an amount ranging from 0.1 to 10% of the total weight of solid catalyst component; b) providing a coloring agent made from or containing at least a pigment; c) mixing the ZN catalyst particles and the coloring agent in a liquid hydrocarbon medium, thereby obtaining a slurry and d) feeding the slurry to a polymerization reactor and subjecting the reactor to polymerization conditions, thereby yielding the propylene polymer.
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公开(公告)号：US20210340367A1
公开(公告)日：2021-11-04
申请号：US17282294
申请日：2019-09-11
摘要： A polypropylene composition made from or containing: A) from 88.0 wt. % to 98.0 wt. %, of a random copolymer of propylene containing from 0.8 wt. % to 4.8 wt. % of 1-hexene derived units; the random copolymer of propylene having: a Melt Flow Rate: measured according to ISO 1133 (230° C., 5 Kg) ranging from 0.5 to 4.4 g/10 min; and B) from 2.0 wt. % to 12.0 wt. % of a terpolymer of propylene ethylene and 1-hexene having a content of ethylene derived units ranging from 35 wt. % to 60 wt.; and a content of 1-hexene derived units ranging from 1 wt. % to 6 wt. %; wherein the polypropylene composition has a Melt Flow Rate: measured according to ISO 1133 (230° C., 5 Kg) ranging from 0.5 to 5.0 g/10 min.
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公开(公告)号：US20210309676A1
公开(公告)日：2021-10-07
申请号：US17267601
申请日：2019-07-25
IPC分类号： C07F7/28 , C08F210/06 , C07F3/02 , C07F9/94
摘要： A solid catalyst component for the polymerization of olefins CH2═CHR in which R is hydrogen or a hydrocarbon radical with 1-12 carbon atoms, made from or containing Mg, Ti, Bi, halogen and an electron donor obtained from a process including the steps:
(a) dissolving a Mg(OR)2 compound wherein R groups, equal to or different from each other, are C1-C15 hydrocarbon groups optionally containing a heteroatom selected from O, N and halogen, in an organic liquid medium, thereby forming a first liquid mixture; (b) contacting the first liquid mixture (a) with TiCl4, thereby forming a second liquid mixture absent a solid phase, and (c) subjecting the second liquid mixture (b) to conditions, whereby solid catalyst particles are formed, wherein (i) a Bi compound and (ii) a bidentate electron donor compound are present in one or more of steps (a) to (c) and/or contacted with the solid catalyst particles obtained from (c).-
公开(公告)号：US11098184B2
公开(公告)日：2021-08-24
申请号：US16471986
申请日：2017-12-18
发明人： Kazuhisa Yasumoto , Miyuki Abe , Takeshi Nakajima
摘要： A masterbatch composition made from or containing: 65 to 85 wt % of a propylene homopolymer or copolymer as component (1) containing 0 to 3 wt % of ethylene or one or more C4-C10-α-olefin-derived units; and 15 to 35 wt % of a propylene-ethylene copolymer as component (2) containing 25 to 35 wt % of ethylene-derived units, wherein the masterbatch composition has: 1) a melt flow rate (230° C., load: 21.18 N) of 5 to 30 g/10 minutes; 2) xylene insolubles with an Mw of 10×104 to 30×104 and an Mw/Mn of 6 to 20 as measured by GPC; and 3) xylene solubles with an intrinsic viscosity of 5.5 to 9.0 dl/g.
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公开(公告)号：US11098143B2
公开(公告)日：2021-08-24
申请号：US16649044
申请日：2018-09-13
IPC分类号： B01J8/26 , C08F210/06 , B01J8/22
摘要： A process for the polymerization of olefins in gas phase carried out in a reactor having two interconnected polymerization zones, a first zone (riser) and a second zone (downcomer), wherein growing polymer particles: a) flow through the riser under fast fluidization conditions established by feeding a mixture of gas and liquid; b) leave the riser and enter the downcomer, through which the growing polymer particles flow downward in a densified form; and c) leave the downcomer and are reintroduced into the riser, thereby establishing a circulation of polymer between the riser and the downcomer; the reactor is operated at a temperature between 0° C. and 5° C. above the dew point of the riser gas at the operating pressure, and in the riser, besides the growing polymer particles and gas flow, an amount of liquid is present.
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公开(公告)号：US20210253837A1
公开(公告)日：2021-08-19
申请号：US17253435
申请日：2019-06-19
IPC分类号： C08L23/12
摘要： A polypropylene composition made from or containing (i) component (1) made from or containing a propylene homopolymer or copolymer containing 0 to 0.5% by weight of an ethylene-derived unit; (ii) component (2) made from or containing an ethylene/propylene copolymer containing 15 to 30% by weight of an ethylene-derived unit; and (iii) 0.01 to 1.0 parts by weight of a crystal nucleating agent based on a total of 100 parts by weight of component (1) and component (2); wherein 1) the Mw/Mn value of xylene insolubles (XI) is in the range of 6 to 20, 2) the weight ratio of component (1) to component (2) is in the range of 82:18 to 90:10, 3) the intrinsic viscosity of xylene solubles (XSIV) is in the range of 2.5 to 3.4 dl/g, 4) the MFR (at 230° C. under a load of 2.16 kg) is in the range of 3 to 10 g/10 min.
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