Abstract: Disclosed is a method for preparing a solid catalyst for propylene polymerization, and more specifically, a method for preparing a solid catalyst for propylene polymerization including (1) first reacting dialkoxy magnesium and titanium halide compound under the presence of an organic solvent; (2) adding two kinds of non-aromatic internal electron donors to a product of the step (1) and reacting the mixture; and (3) second reacting the product of the step (2) with a titanium halide compound and washing a reaction product. The catalyst prepared according to the method as described in the present disclosure not only may provide high catalytic activity, but also may provide a propylene polymer having excellent stereoregularity.

Abstract: Disclosed is a catalyst pre-contact method for the continuous polymerization of an olefin, wherein a primary catalyst, a co-catalyst and, optionally, an external electron donor are mixed and then undergo a pre-contact reaction, with the pre-contact reaction temperature being ?30° C. to 35° C. and adjustable, and the pre-contact reaction time being 0.5 min to 10 min and adjustable, and the pre-contacted catalyst is brought into a catalyst prepolymerization system and then into a catalyst polymerization system, or is directly brought into the catalyst polymerization system. Further disclosed is a catalyst pre-contact device for the continuous polymerization of an olefin, which can adjust the pre-contact time and pre-contact temperature of the catalyst so that the performance of the catalyst achieves a better level according to the process.

Abstract: Injection molded article for healthcare applications based on propylene homopolymer.

Abstract: The present disclosure provides a Ziegler-Natta catalyst composition for preparing polymers of ethylene monomers having ultrahigh molecular weight, said composition comprises (i) a pro-catalyst component containing a reaction product of a magnesium containing compound and a titanium containing compound, characterized in that said pro-catalyst component comprises magnesium, titanium and chlorine in an amount ranging between 15 and 18 mole %; 20 and 23 mole %; and 60 and 64 mole %, respectively, all proportions being with respect to the total weight of the Ziegler-Natta catalyst composition; (ii) a co-catalyst component; and (iii) at least one external electron donor compound selected from the group of organosilane compounds having the general formula (I), wherein R1, R2, R3 and R4 are all the same or all are different, or some are the same, and are individually selected from the group consisting of linear or branched alkyl groups, cycloalkyl groups, aryl groups, alkoxy and aryloxy groups.

Abstract: A solid catalyst component for olefin polymerization exhibits excellent catalytic activity during polymerization, and can produce a polymer that exhibits excellent stereoregularity, bulk density, and the like even when a polymerization catalyst is produced in an inert atmosphere using an electron donor compound other than a phthalic ester and an organosilicon compound. The solid catalyst component for olefin polymerization is produced by bringing a vinylsilane compound (d) into contact with a catalyst component, the catalyst component being a powdery solid component obtained by bringing a magnesium compound (a), a titanium halide compound (b), and an electron donor compound (c) into contact with each other, the electron donor compound (c) being one or more compounds that do not include a phthalic ester structure, and include one or more groups selected from an ester group, a carbonate group, and an ether group, the vinylsilane compound (d) being brought into contact with the catalyst component in a 0.

Abstract: Supported Ziegler-Natta ethylene polymerization procatalyst comprising special bi-(oxygen containing ring) compounds as internal donor, as well as a process for preparing the same and use of such a procatalyst for preparing a catalyst system used in the polymerization of ethylene for producing high molecular weight polyethylenes.

Abstract: A low molecular weight copolymer is provided comprising propylene and ethylene, wherein the low molecular weight copolymer has a softening point in the range of 90 to 140° C., wherein the low molecular weight copolymer has a needle penetration that is equal to y, wherein y is defined by the following formula: y??0.000000262249x6+0.000172031278x5?0.046669720165x4+6.701746779438x3?537.286013331959x2+22,802.983472587x?400,204.018086126 wherein x in the above formula is the softening point of the low molecular weight copolymer, and wherein the low molecular weight copolymer has a molecular weight polydispersity index of about 3 to about 25, a crystallinity of about 18% to about 30% measured by X-Ray diffraction, and a Brookfield viscosity in the range of about 1000 to about 4000 cp at 190° C. measured by ASTM D 3236. Adhesive compositions comprising the low molecular weight copolymer are also provided.

Abstract: Butene-1 terpolymers having a content of propylene derived units of 0.5-13% mol, and a content of ethylene derived units of 1-3% mol, a ratio C3/C2 of the content of propylene and ethylene derived units is of from 1 to 10, said butene-1 terpolymers having a melt flow rate MIE, measured at 190° C./2.16 Kg of from 0.3 to 3 g/10 min, and a molecular weight distribution curve determined by GPC with a ratio Mw/Mn of from 4 to 10, and the portion of molecular weights of 1×105 or lower, accounting for 22% or larger of the total area.

Abstract: A stable formulation comprising a silicon containing precursor selected from an alkoxysilane, aryloxysilane, or alkylalkoxysilane and a catalyst compound comprising a haloalkoxyalkylsilane or haloaryloxyalkylsilane wherein the substitutents within the silicon-containing precursor and catalyst compound are the same are described herein. More specifically, the formulation comprises a silicon-containing precursor comprising an alkoxyalkylsilane or aryloxysilane having a formula of Si(OR1)nR24-n and a catalyst comprising haloalkoxyalkylsilane having a formula of XSi(OR1)nR23-n; or a silicon-containing precursor comprising an alkoxysilane or aryloxysilane having a formula of R23-p(R1O)pSi—R3—Si(OR1)pR23-p and a catalyst comprising a haloalkoxyalkylsilane or haloaryloxyalkylsilane having a formula of (R1O)mR22-m(X)Si—R3—Si(OR4)2R5 wherein at least one or all of the R1 and R2 substituents are the same in both the silicon-containing precursor and catalyst compound are described herein.

Abstract: A process for the polymerization of propylene is disclosed. The process may include contacting, in a gas phase polymerization reactor, propylene and optionally one or more comonomers with a catalyst system comprising a Ziegler-Natta catalyst and an external electron donor system comprising di(bicyclo[2.2.1]heptan-2-yl)dimethoxysilane.

Abstract: Amorphous propylene-ethylene copolymers are described herein that can include high amounts of ethylene and exhibit desirable softening points and needle penetrations. The desirable combinations of softening points and needle penetrations in these propylene-ethylene copolymers allow them to have a broad operating window. Due their broad operating window, the propylene-ethylene copolymers can be utilized in a wide array of applications and products, including hot melt adhesives.

Abstract: Solid catalyst components for use in olefin polymerization, systems incorporating the same, methods of producing the same, and methods of use are disclosed. The solid catalyst components are formed by (a) dissolving a magnesium compound and an auxiliary intermediate electron donor in at least one first solvent to form a solution; (b) contacting a first titanium compound with said solution to form a precipitate of the magnesium compound and the first titanium compound; (c) washing the precipitate with a mixture of a second titanium compound and at least one second solvent and optionally an electron donor at a temperature of up to 90° C.; and (d) treating the precipitate with a mixture of a third titanium compound and at least one third solvent at 90-150° C. to form a solid catalyst component.

Abstract: A method produces a novel solid catalyst component for olefin polymerization that achieves excellent olefin polymerization activity and activity with respect to hydrogen during polymerization, and can produce an olefin polymer that exhibits a high MFR, high stereoregularity, and excellent rigidity. The method includes a first step that brings a magnesium compound, a tetravalent titanium halide compound, and one or more first internal electron donor compounds into contact with each other to effect a reaction, followed by washing; a second step that brings one or more second internal electron donor compounds into contact with a product obtained by the first step to effect a reaction; and a third step that brings a tetravalent titanium halide compound and one or more third internal electron donor compounds into contact with a product obtained by the second step to effect a reaction.

Abstract: Amorphous propylene-ethylene copolymers are described herein that can include high amounts of ethylene and exhibit desirable softening points and needle penetrations. The desirable combinations of softening points and needle penetrations in these propylene-ethylene copolymers allow them to have a broad operating window. Due their broad operating window, the propylene-ethylene copolymers can be utilized in a wide array of applications and products, including hot melt adhesives.

Abstract: The invention relates to a process for preparing a polymerization catalyst component wherein a solid compound with formula Mg(OR1)xCl2-x wherein x is larger than 0 and smaller than 2, and each R1, independently, represents an alkyl group, said compound being obtained by reacting a Grignard compound with an alkoxy- or aryloxy-containing silane compound, is contacted with at least one activating compound selected from the group formed by internal electron donors and compounds of formula M(OR2)v-w(R3)w, wherein M can be Ti, Zr, Hf, Al or Si, each R2 and R3, independently, represent an alkyl, alkenyl or aryl group, v is the valency of M and w is smaller than v, in the presence of an inert dispersant to give an intermediate reaction product, and wherein the intermediate reaction product is contacted with a halogen-containing Ti-compound. A catalyst system comprising said component shows improved performance in olefin polymerization.

Abstract: Disclosed herein are processes for preparing procatalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions improve catalyst selectivity and also increase the bulk density of the formant polymer.

Abstract: A method comprises receiving a request to remove a given application from a first device, identifying one or more verification rules previously established by a user of the first device for processing of the removal request, sending a notification regarding said one or more verification rules, receiving verification input responsive to the notification, and granting or denying the removal request based at least in part on the received verification input. Denying the removal request comprises removing protected application data from the first device. Receiving the removal request, identifying one or more verification rules, sending the notification, receiving the verification input, and granting or denying the removal request may be implemented in a verification platform adapted for communication with the first device.

Abstract: It has been discovered that amorphous polybutene copolymers that have a softening point of from about 70 to about 105° C. and viscosity of less than about 1,900 cP at 190° C. possesses desirable properties and may be used to make a low application temperature hot melt adhesive for disposable absorbent articles.

Abstract: The present invention relates to regular shaped magnesium particles containing attrition resistant precursors and procatalysts thereof and processes for their synthesis and their use in the manufacture of polyolefins. More particularly, the present invention relates to a process for the synthesis of a said precursor particles which give highly active and improved surface area procatalysts for producing high bulk density polyolefin resins containing low fines and capable of incorporating high rubber content. In particular, the present invention relates to process for the synthesis of an attrition resistant precursors to prepare an attrition resistant Zeigler Natta procatalysts synthesized by using the precursors and to the polyolefin resin synthesized using the said procatalysts.

Abstract: A pre-polymerized catalyst component for the polymerization of olefins endowed with high activity and morphological stability comprises (i) a non-stereospecific solid catalyst component comprising Ti, Mg and a halogen and having a porosity, due to pores with radius up to 1 ?m, ranging from 0.2 to 0.8 cm3/g and (ii) an amount of an ethylene/alpha-olefin block (co)polymer ranging from 0.1 up to 5 g per g of said solid catalyst component (i), said pre-polymerized catalyst component being characterized by a mercury porosity due to pores up to 1 ?m of less than 70% the mercury porosity value of the said non-stereospecific solid catalyst component (i).

Abstract: The present invention relates to a catalyst system for polymerization of propylene, process for preparing polypropylene and to polypropylene prepared by said process. The dual external donor composition of present invention has synergistic effects. It improves the efficiency of polymerization process and product properties for homo grade of polypropylene.

Abstract: Catalyst component for the polymerization of olefins comprising Mg, Ti, halogen and two electron donor compounds one of which selected those of formula (I) and the other being selected from succinates of formula (II):

Abstract: The present invention relates to a process for the production of propylene polymers in the presence of a blend of a first Ziegler-Natta catalyst, which comprises a titanium compound having at least one titanium-halogen bond and a diether compound as internal electron donor, and a second Ziegler-Natta catalyst, which comprises a titanium compound having at least one titanium-halogen bond and a succinate compound as internal electron donor.

Abstract: The present invention discloses new class of nitrogen containing external donor systems. These donor systems are used in titanium supported on magnesium dichloride pro-catalyst system for polymerization of propylene. The external donor systems of the present invention in combination with silane show the kinetics control for diester catalyst polymerization process along with stereo regularity control of product. The polypropylene produced using nitrogen containing external donor systems of the present invention have broad molecular weight distribution.

Abstract: Solid catalyst components for use in olefin polymerization, olefin polymerization catalyst systems containing the solid catalyst components, methods of making the solid catalyst components and the catalyst systems, and methods of polymerizing and copolymerizing olefins involving the use of the catalyst systems. The solid catalyst components are formed by (a) dissolving a magnesium compound and an auxiliary intermediate electron donor in at least one first solvent to form a solution; (b) contacting a first titanium compound with said solution to form a precipitate of the magnesium compound and the first titanium compound; (c) washing the precipitate with a mixture of a second titanium compound and at least one second solvent and optionally an electron donor at a temperature of up to 90° C.; and (d) treating the precipitate with a mixture of a third titanium compound and at least one third solvent at 90-150° C. to form a solid catalyst component.

Abstract: An olefin polymerization catalyst and preparation method and use thereof are provided. The components of the catalyst comprise an active magnesium halide, a titanium compound containing at least one Ti-halide bond loaded on the active magnesium halide, and an internal electron donor selected from one or more silicon esters compounds having formula (I). The method for preparing the catalyst components is that: adding spherical magnesium chloride alcoholate particles and the electron donor into the solution of titanium compound in sequence, and processing with the titanium compound for one or more times to obtain the catalyst. The catalyst system used for the olefin polymerization comprises the catalyst components, a cocatalyst and an external electron donor. The catalyst has high activity for the propylene polymerization, and the activity is 4399 gPP/gTi·h(50° C., 1 h, slurry polymerization at atmospheric pressure), and the isotacticity of the polymer is 98%.

Abstract: 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.

Abstract: Disclosed herein are a polypropylene with narrow molecular weight distribution and a process for preparing the same in a reactor using a Ziegler-Natta catalyst.

Abstract: A high activity polyolefin catalyst system comprising titanium containing pro-catalyst component, a co-catalyst component and an external electron donor compound is provided wherein the high activity polyolefin catalyst system is having controlled morphology and less fines. At least one embodiment of the present invention is more directed to provide a method for the preparation of titanium containing pro-catalyst component from solid spherical shaped magnesium containing pro-catalyst precursor wherein the spherical morphology of the pro-catalyst precursor is maintained through out the reaction in order to achieve titanium-containing pro-catalyst having controlled morphology. The polymerization of lower olefins in the presence of high activity polyolefin catalyst having controlled morphology provides polyolefins with minimal polymer fines.

Abstract: Heterocyclic organic compounds are used as electron donors in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The electron donors may be used in the preparation of solid catalyst system, thus serving as “internal electron donors”, or they may be employed during or prior to polymerization with the co-catalyst as “external electron donors”.

Abstract: A catalyst for polymerization of olefins formed from (A) a solid catalyst component containing magnesium, titanium, halogen, and an electron donor compound, (B) an organoaluminum compound shown by the formula, R6pAlQ3-p, and (C) an aminosilane compound shown by the formula, R3nSi(NR4R5)4-n; and a process for producing a catalyst for polymerization of olefins in the presence of the catalyst are provided. A novel aminosilane compound, a catalyst component for polymerization of olefins having a high catalytic activity, capable of producing polymers with high stereoregularity in a high yield, and exhibiting an excellent hydrogen response, a catalyst, and a process for producing olefin polymers using the catalyst are provided.

Abstract: A catalyst system can include a Ziegler-Natta catalyst, an internal donor, a magnesium halide in active form, and an organoaluminium compound. The Ziegler-Natta catalyst can have a titanium compound and at least one titanium-halogen bond. The internal donor can include at least 80 wt % of an enamino-imine with respect to a total weight of the internal donor. The Ziegler-Natta catalyst and the internal donor can both be supported on the magnesium halide in active form.

Abstract: Heterocyclic organic compounds are used as electron donors in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The electron donors may be used in the preparation of solid catalyst system, thus serving as “internal electron donors”, or they may be employed during or prior to polymerization with the co-catalyst as “external electron donors”.

Abstract: A solid adduct comprising magnesium chloride and ethanol in which the moles of ethanol per mole of magnesium chloride range from 2 to 5 and in which the ratio between the average pore radius measured in Angstrom of said adduct, determined by mercury porosity, and the moles of ethanol, is higher than 500.

Abstract: The present invention relates to a process for the production of fibres and filaments with polypropylene having a broad polydispersity index. The present invention also relates to high elongation nonwoven prepared from such fibres and filaments. It further relates to films and laminates prepared from high elongation nonwoven.

Abstract: A catalyst component for olefin polymerization which contains magnesium, titanium, halogen and electron donors is provided in the present invention. The electron donors are selected from at least one succinate compounds of following general formula (I), and the content of said succinate compounds with the structure as shown in Formula (II) in said succinate compounds (I) is less than 100%, but not less than 51.0 wt %. Compared with the mesomer whose content with the structure as shown in Formula (II) is 100%, the catalyst component provided by the present invention not only greatly decreases the manufacturing cost, but also improves certain properties of the catalyst, for example the molecular weight distribution of polymer obtained by catalytic reaction using said catalyst is wider, which is beneficial for improving processing properties of polymers. The corresponding catalyst is also provided.

Abstract: A solid catalyst component for olefin polymerization is produced by causing (a) a solid component that includes magnesium, titanium, a halogen, and an electron donor, (b) an aminosilane compound shown by the following general formula (1), and (c) at least one organosilicon compound selected from an organosilicon compound shown by the following general formula (2-A) and an organosilicon compound shown by the following general formula (2-B) to come in contact with each other. A polymer having high stereoregularity is produced in high yield while achieving a high melt flow rate due to hydrogen by polymerizing an olefin in the presence of a catalyst that includes the solid catalyst component.

Abstract: Catalyst component for the polymerization of olefins CH2?CHR in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising Mg, Ti, halogen and two electron donor compounds one of which selected those of formula (I) wherein: R2, equal to or different from each other, are hydrogen atoms or C1-C20 hydrocarbon radicals optionally containing heteroatoms belonging to groups 13-17 of the periodic table of the elements or alkoxy groups of formula —OR1, two or more of the R2 groups can be connected together to form a cycle; R1, equal to or different from each other, are C1-C20 hydrocarbon radicals optionally containing heteroatoms belonging to groups 13-17 of the periodic table of the elements, with the proviso that at least one of R2 is —OR1 and the other being selected from succinates of formula (II): wherein the radicals RI and RII, equal to or different from each other, are a C1-C20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group, optionally containi

Abstract: A catalyst component for the polymerization of olefins comprising Mg, Ti and Cl obtained by a process comprising the following steps: a) reacting a precursor of formula MgCl2.mEtOH, wherein m is equal to, or lower than, 1.5 having a porosity due to pores with radius up to 1? of higher than 0.4 cm3/g with an alcohol of formula RIOH where RI is an alkyl different from ethyl, a cycloalkyl or aryl radical having 3-20 carbon atoms said RIOH being reacted with the said precursor using molar ratio RIOH/Mg ranging from 0.01 to 10; b) reacting the product obtained in (a) with TiCl4 using Ti/Mg molar ratio ranging from 0.01 to 15, c) reacting the product obtained in (b) with a silicon compound of formula RIaRIIbSi(ORIII)4?(a+b) where RI-RIII are linear or branched, cycloalkyl, aryl C1-C20 hydrocarbon groups a and b are integers from 0 to 2.

Abstract: The invention refers to a process for preparing a Group 2 metal/transition metal olefin polymerization catalyst component in particulate form having improved polymerization properties due to the use of H2 during catalyst component preparation and the use of such catalyst components in a process for polymerizing olefins.

Abstract: The present invention relates to a process for the production of fibers and filaments with polypropylene having a broad polydispersity index. The present invention also relates to high elongation nonwoven prepared from such fibers and filaments. It further relates to films and laminates prepared from high elongation nonwoven.

Abstract: A catalyst component for olefin polymerization is disclosed, which comprises a reaction product of the following components: (1) a spheric carrier; (2) a titanium compound; and optionally, (3) an electron donor, wherein the spheric carrier comprises a reaction product of at least the following components: (a) a magnesium halide represented by a general formula of MgX2-nRn, wherein X is independently chloride or bromide, R is a C1-C14 alkyl, a C6-C14 aryl, a C1-C14 alkoxy, or a C6-C14 aryloxy, and n is 0 or 1; (b) an alcohol compound; and (c) an epoxy compound represented by a general formula (I), wherein R2 and R3 are independently hydrogen, a C1-C5 linear or branched alkyl, or a C1-C5 linear or branched haloalkyl.

Abstract: The present invention relates to a process of producing an ethylene polymer composition in multiple stages, of which the first stage is preferably a slurry polymerization stage, in the presence of a catalyst system, comprising: a) a solid catalyst precursor, comprising a transition metal selected from titanium and vanadium; magnesium; a halide, optionally an electron donor; and a solid particulate material comprising an inorganic oxide, and wherein the median particle diameter, D50, of the solid catalyst precursor, based upon the total volume of solid catalyst precursor, is from 1 to 13 micrometers; and b) an organoaluminium compound.

Abstract: A polymer having high catalyst activity, excellent hydrogen response, high stereoregularity and high yield can be obtained by polymerizing olefins in the presence of a catalyst for olefin polymerization comprising (A) a solid catalyst component containing magnesium, titanium, a halogen, and an electron donor compound, (B) an organoaluminum compound shown by the formula R6pAlQ3-p(R1R2N)m, and (C) an aminosilane compound shown by the formula (R3HN)nR4pSi(OR5)q.

Abstract: Disclosed is a production method of polypropylene having high MFR value and excellent product qualities with high productivity. The method enables to produce a propylene polymer by a gas phase process where the reaction heat is removed mainly by the heat of vaporization of liquefied propylene. The method is characterized by using a solid catalyst component (A) which is prepared by contacting components (A1), (A2) and (A3) shown below. Further disclosed are: a propylene polymer produced by the method; a propylene polymer composition; and a molded body of the composition. Component (A1): a solid component containing titanium, magnesium and a halogen as essential components. Component (A2): a vinyl silane compound. Component (A3): an organosilicon compound having an alkoxy group (A3a) and/or a compound having at least two ether bonds (A3b).

Abstract: Provided is a procatalyst composition containing a multiple internal electron donor with at least two components, one of which is a silyl ester. The other component of the mixed internal electron donor may be an electron donor component. The electron donor component may be an aromatic acid ester, a di-ether, and combinations thereof. Catalyst compositions containing the multiple internal electron donor exhibit improved hydrogen response during olefin polymerization and produce propylene-based polymers with broad molecular weight distribution, high flexural modulus, and high melt flow rate.

Abstract: A solid catalyst for propylene polymerization includes titanium, magnesium, halogen and a maleate compound as an internal electron donor. A method for preparing propylene using the catalyst is also described. According to the present invention, it is possible to prepare polypropylene having a wide molecular weight distribution.

Abstract: The present invention relates to an improvement for gas phase olefin polymerization process under two or more different flow regimes. The process involves adding a mixed electron donor system to a reactor having two or more different flow regimes, wherein the mixed electron donor system comprises at least one selectivity control agent and at least one activity limiting agent. The invention is particularly well suited for reactor systems which include a regime characterized by having a low-velocity or high-solid holdup, which have been reported to have operational problems such as particle agglomeration and formation of polymer “chunks”.

Abstract: The invention is directed to a slurry phase polymerisation process for the preparation of ethylene-?-olefin copolymers by polymerising ethylene in the presence of a chromium containing catalyst and a diluent. The polymerisation takes place in the presence of·a chromium-containing catalyst, ·an aliphatic or alicyclic boron compound having at least one boron to carbon linkage and·an aliphatic or alicyclic group MA or group IMA element based compound having at least one metal or metalloid to carbon linkage wherein the chromium containing catalyst is not reduced by carbon monoxide after the activation in a non-reducting atmosphere and wherein the metal or metalloid is present in an amount higher than 1 ppm relative to the amount of diluent.

Abstract: The present disclosure provides silyl esters and silyl diol esters suitable as internal electron donors in procatalysts for polymer production. Disclosed are procatalyst compositions formed from a procatalyst precursor and an internal electron donor that is a silyl ester or a silyl diol ester. The procatalyst compositions can be used with a cocatalyst and optionally an external electron donor and/or an activity limiting agent to form a Ziegler-Nana catalyst composition. The present catalyst compositions exhibit high catalyst activity and form olefin-based polymers with broad molecular weight distribution, favorable flexural modulus, and high isotacticity.