1305 results about "Olefin polymerization" patented technology

The invention belongs to the field of olefin polymers, and relates to a reversible cross-linked polyolefin elastomer and a preparation method thereof. The reversible cross-linked polyolefin elastomer is a reversible cross-linked polyolefin elastomer in which a cross-linked network is formed through three non-covalent bonds, namely hydrogen bonds, ionic bonds and coordinate bonds, and the hydrogen bonds and the cross-linked bonds account for 0.1-85% by taking the sum of the three non-covalent bonds, namely the hydrogen bonds, the ionic bonds and the coordinate bonds as 100%; the ionic crosslinking bond accounts for 0.5-90%; and the coordination crosslinking bond accounts for 9-99%. Compared with a reversible cross-linked polyolefin elastomer in the prior art, the reversible cross-linked polyolefin elastomer prepared by the invention contains hydrogen bonds, ionic bonds and coordinate bonds at the same time, and a synergistic effect is generated through combination of reversible cross-linked interaction of the coordinate bonds, the hydrogen bonds and the ionic bonds; therefore, the material has excellent physical and mechanical properties and also has recoverability and self-repairability.

The invention belongs to the technical field of propylene polymerization, and particularly relates to a catalyst for olefin polymerization, an isotacticity-adjustable propylene polymer containing an ultra-high molecular weight polypropylene component and a production method of the isotacticity-adjustable propylene polymer, and the method comprises the following steps: in the presence of hydrogen and a polymerization catalyst, propylene or propylene reacts with one or more optional comonomers; at least one part of the obtained material flow containing the polypropylene component I is continuously subjected to polymerization reaction for 0.05-3.0 hours in a pipeline positioned outside the reactor or a subsequent reactor connected with the pipeline in series and in the presence of a mixture DH of a hydrogenation catalyst and an external electron donor; a propylene polymer product containing 0.03 wt%-15.0 wt% of an ultra-high molecular weight polypropylene component is obtained; the molar ratio of the hydrogenation catalyst to the total amount of hydrogen is 1 / 10000 to 1 / 100. According to the invention, the polypropylene product containing the ultra-high molecular weight component with lower content is prepared, and the isotacticity of the ultra-high molecular weight polypropylene component can be flexibly adjusted.

The purposes of the present invention is: to provide an adhesive composition which has excellent adhesive force and holding properties in addition to excellent low dielectric properties; to provide an adhesive tape which has an adhesive layer that contains the adhesive composition; to provide a resin molded body which is molded from a resin composition that comprises the adhesive composition; to provide a composite structure which comprises the adhesive tape; to provide an automobile member which comprises the resin molded body or the composite structure; and to provide a method for producing a resin molded body using the composite structure.　The present invention provides an adhesive composition which contains: an acrylic copolymer that has a constituent unit derived from a (meth)acrylic acid alkyl ester, a constituent unit derived from an olefin-based polymer that has a polymerizable unsaturated double bond at an end thereof, and a constituent unit derived from a polar functional group-containing monomer; and a styrene-based elastomer that contains at least one substance selected from the group consisting of a block copolymer which has a block derived from a styrene-based monomer and a block derived from a conjugated diene-based monomer, and a hydrogenated product of the block copolymer.

The invention relates to the technical field of catalytic synthesis, in particular to a preparation method and polymerization application of a carbon nanotube-based double-cyclopentadienyl bridged metallocene catalyst, and the preparation method comprises the following steps: 1, acidizing a carbon nanotube; 2, dispersing the acidified carbon nanotubes in a methylaluminoxane solution in a nitrogen or inert gas atmosphere to obtain an acidified carbon nanotube dispersion liquid; and 3, mixing the double-cyclopentadienyl bridged metal compound solution with the acidified carbon nanotube dispersion liquid for reaction. According to the invention, the carbon nanotubes are added into an olefin polymerization reaction system in the form of a double-metallocene bridged metallocene catalyst carrier, so that the tensile strength and toughness of polyolefin are improved while olefin polymerization reaction is catalyzed with high catalytic activity.

The invention discloses a batch processing technology of micro-fluidic chips, and relates to the technical field of chip processing. The method comprises the following steps: firstly, providing at least two layers of polymer coiled materials, namely a first coiled material for forming a micro-channel structure and a second coiled material for closing a micro-channel, the coiled materials are continuous coiled materials selected from polyethylene glycol terephthalate (PET), cycloolefin polymer (COP), polycarbonate (PC) or polymethyl methacrylate (PMMA), and the coiled materials are continuous coiled materials selected from polyethylene glycol terephthalate (PET), cycloolefin polymer (COP), polycarbonate (PC) or polymethyl methacrylate (PMMA); the thickness of the coiled material is 50-500 microns; secondly, carrying out continuous compression molding processing on the surface of the first coiled material through a roll-to-roll processing platform; through a roll-to-roll continuous process, micro-channel mold pressing, functional deposition, precise alignment bonding and online cutting are integrated, high-efficiency, high-consistency and high-integration-level batch manufacturing of the micro-fluidic chip is realized, and manual intervention and production cost are remarkably reduced.

The present invention relates to an adhesive agent formed from an adhesive agent composition containing an acrylic copolymer, the acrylic copolymer including a constituent unit (i) derived from an alkyl (meth)acrylate, a constituent unit (ii) derived from an olefin polymer having a terminal polymerizable unsaturated double bond, and a constituent unit (iii) derived from a polar functional group-containing monomer, 5 mass% or more of the copolymer is constituted by the constituent unit (ii), and said adhesive agent satisfying at least one of the following first, second, and third configurations. First configuration: (1) 0 to 30 mass% of the polymer is constituted by a constituent unit (i-1) having a C1-4 alcohol-derived alkyl group, and (2) the gel fraction of the adhesive agent is 10 to 90 mass%. Second configuration: (1) More than 10 mass% to 60 mass% or less of the copolymer is constituted by the constituent unit (i-1), and (2) the gel fraction of the adhesive agent is 55 mass% or less. Third configuration: (1) The SP value of the copolymer is 9.30 (cal / cm3)1 / 2 to 9.95 (cal / cm3)1 / 2, and (2) the gel fraction of the adhesive agent is 10 to 55 mass%.

The invention discloses a heat exchanger, a reactor and application thereof and an olefin polymerization method, the heat exchanger comprises a shell pass cylinder, a heat exchange tube, a first tube plate and a first end plate, the first end plate is provided with an input through hole and an output through hole, and the surface, facing the first tube plate, of the first end plate is provided with a separator located between the input through hole and the output through hole; the thickness of the separator is gradually reduced, and a first slope surface and a second slope surface are respectively formed on two sides of the separator and extend to the first tube plate. According to the technical scheme, the space between the first end plate and the first tube plate is divided into the input cavity and the output cavity through the separator, the slopes are formed on the two sides of the separator, media are directionally guided, the circulation space is reasonably distributed, the retention time of the media in the tube box is shortened, the retention time of the media in the heat exchanger is shortened, and the heat exchange efficiency is improved. Therefore, the wax aggregation phenomenon in the heat exchanger is effectively inhibited.

Catalyst systems for olefin polymerization include a metal-ligand complex of a general formula (I). The metal-ligand complex of formula (I) is a transition metal complex of titanium, zirconium, or hafnium, in which the transition metal is coordinated with a biaryl phenoxy ligand structure. Olefin polymerization processes include contacting ethylene and optionally one or more (C3-C12) alpha-olefins in the presence of the catalyst system to produce an ethylene-based polymer or copolymer.

It is intended to provide a method for producing a catalyst for olefin polymerization which exhibits excellent catalytic activity in a polymerization treatment and permits production of a polymer excellent in stereoregularity, melt flowability, etc., even when the polymerization catalyst is prepared in an inert gas atmosphere by using a solid catalytic component comprising an electron-donating compound other than a phthalic acid ester. The method for producing a catalyst for olefin polymerization comprises performing a pre-contact treatment of bringing a solid catalytic component (A) comprising a magnesium atom, a titanium atom, a halogen atom and an electron-donating compound having no phthalic acid ester structure, a specific organoaluminum compound (B) and an external electron-donating compound (C) into contact with each other at a temperature of lower than 15° C. for a time of 30 minutes or shorter in the absence of the olefin.

A polyolefin production method and a device, belonging to the field of olefin polymerization. The method comprises using as a polymerization solvent in a first reactor a mother liquor containing a polymer having a low molecular weight; then introducing a slurry product in the first reactor to a second reactor, and a slurry product discharged from the second reactor undergoing steps of washing, filtration, drying, granulation, etc.; and / or, washing the slurry product in the first reactor and then performing filtration, drying, granulation, and other steps on same together with the slurry product discharged from the second reactor, so as to finally obtain a high-performance polyolefin product having an ultra-wide molecular weight distribution. The present invention can achieve improvement both in the processing performance and using performance of polyolefins and has the advantages of simple technological process, high operation flexibility, etc.

The invention provides a heat exchanger, a reactor and application thereof and an olefin polymerization method.The heat exchanger comprises a shell pass barrel, a heat exchange tube arranged in the shell pass barrel, a first tube plate arranged at the first end of the shell pass barrel and a first end plate connected to the outer side of the first tube plate, and the first end plate is provided with an input through hole and an output through hole; the surface, facing the first tube plate, of the first end plate is provided with a partition located between the input through hole and the output through hole, the partition divides the portion, between the first tube plate and the first end plate, of the first end plate into an input cavity and an output cavity which are communicated with the heat exchange tube, and the through-flow area of the input through hole is larger than that of the output through hole. According to the technical scheme, the space between the first end plate and the first tube plate is divided by the partition piece to form the input cavity and the output cavity, the through-flow area of the output through hole is smaller than that of the input through hole, fluid obtained after heat exchange can flow out at a higher flow speed, and therefore blockage in the output through hole is avoided or reduced.

The invention discloses a method for producing multimodal polyethylene through series connection of multiple reactors, and belongs to the field of olefin polymerization. The low-molecular-weight or medium-molecular-weight ethylene polymer is produced through polymerization in the first reactor, the obtained product enters the intermediate treatment unit to remove hydrogen, and then part of the product is shunted to enter the second reactor to be mixed with the ultra-high-molecular-weight ethylene polymer produced through ethylene polymerization in the second reactor; all polymers of the second reactor are returned to the intermediate treatment unit, and the rest products after hydrogen removal enter a third reactor and are mixed with high-molecular-weight ethylene polymers generated by copolymerization of ethylene and comonomers in the third reactor to generate multimodal polyethylene. The multimodal polyethylene produced by the method is wide in molecular weight distribution, and the molecular weight of ultra-high molecular weight polyethylene is flexible to regulate and control. According to the invention, material circulation between the third reactor and the second reactor is adopted, molecular chain-level mixing among the components is achieved, the compatibility is good, and the mechanical property is more excellent.

Embodiments provide bimodal polymerization catalyst systems comprising metallocene olefin polymerization catalysts and biphenylphenol polymerization catalysts made from biphenylphenol polymerization precatalysts of Formula I.

The present invention relates to an anti-caking tablet for metallocene olefin polymerization process, wherein the anti-caking tablet comprises the following raw material components in parts by weight: 50-99.9 parts of alkane oil solvent, 0.01-20 parts of fatty acid compounds, 0.01-40 parts of fatty acid salt compounds, and 0.001-5 parts of emulsifiers. Compared with the prior art, the present invention can effectively prevent, reduce or stop the agglomeration and flake problem of polyolefin particles during the polymerization process, improve the dispersion stability of the anti-caking tablet, and have no obvious adverse effect on the activity of the matching metallocene catalyst. At the same time, the obtained final product can be used for various applications such as food contact.

The invention discloses a polyolefin catalyst, a preparation method thereof and an olefin polymerization method. R1 and R8 are selected from hydrogen atoms and respectively meet the following conditions: 6.0 ppm < = delta1 < = 6.8 ppm, 6.0 ppm < = delta8 < = 6.8 ppm, and delta1 and delta8 are respectively chemical shifts of R1 and R8 in hydrogen spectrum nuclear magnetism of the catalyst. The catalyst can catalyze copolymerization of ethylene / alpha-olefin with high activity.

The invention provides an organic boron salt olefin polymerization cocatalyst as well as a preparation method and application thereof, and belongs to the technical field of olefin polymerization catalysts. The organic boron salt olefin polymerization promoter provided by the invention has a structure as shown in a formula I. In the formula I, Ct < + > is a cation capable of enabling a metal alkyl chain to be subjected to alkyl elimination, and R1 is independently selected from carbon or silicon atoms; r2, R3 and R4 are independently selected from hydrogen, alkyl or phenyl respectively; the organic boron salt olefin polymerization cocatalyst provided by the invention is mainly used in olefin polymerization reaction. Compared with a traditional perfluorotetraphenylboron promoter [Ct] + [B (C6F4-R-p) 4]-, the organic boron promoter [Ct] + [B (C6F4-R-p) 4]-has better solubility in non-polar straight-chain alkane and cycloalkane, metallocene and non-metallocene main catalysts can be efficiently activated, a more loose anion-cation pair polymerization active center is formed, and olefin coordination and polymerization are facilitated. And the formula I of the # imgabs0 # is shown in the specification.

The invention relates to the technical field of chemical engineering, and discloses a metallocene compound, a preparation method, a metallocene catalyst and an application of the metallocene catalyst. The chemical structure of the metallocene compound provided by the invention comprises a fluorenyl ligand, a metallocene ligand, a bridging structure and a metal part, and an adsorption group with a micropore effect is introduced into the fluorenyl ligand, so that when the metallocene compound provided by the invention interacts with cocatalysts such as organic boron, organic aluminum and the like, the metallocene compound has the advantages that the adsorption efficiency is improved; compared with the prior art, the catalyst provided by the invention has the advantages of high saturated adsorption capacity, increase of the concentration of the cocatalyst around the metal center, and substantial enhancement of the activity and thermal stability of the catalyst, so high-activity catalysis of alpha-olefin polymerization can be realized, the usage amount of the cocatalyst is reduced, and the production cost of polyolefin is reduced.

The invention provides a cycloolefin polymer, a cycloolefin polymerization process and application. The cycloolefin polymerization process comprises a raw material preparation process, a polymerization process, a hydrogenation reaction process, a devolatilization process and a devolatilization extrusion granulation process. According to the process, cycloolefin is subjected to a polymerization reaction in a polymerization kettle to generate a polymer; the process comprises the following steps: feeding a material from a polymerization kettle into a hydrogenation reaction kettle, and carrying out hydrogenation reaction to generate a cycloolefin polymer; the process comprises the following steps: feeding a material from a hydrogenation reaction kettle into a devolatilization kettle to remove volatile matters; according to the process, the cycloolefin polymer discharged from a devolatilization kettle enters a screw extruder, the space between a feed port and an outlet of the screw extruder is at least divided into 2-3 sections, exhaust ports are formed in the at least 1-2 sections from the feed port and used for vacuumizing, volatile matter is further removed, and the cycloolefin polymer with the low volatile matter content is obtained. The cycloolefin polymer is not crosslinked, has stable structure and performance, does not turn yellow, and is easy to process.

The invention discloses a hydrophobic wear-resistant high-light-transmittance film and a preparation method thereof. The hydrophobic wear-resistant high-light-transmittance film comprises a supporting layer and a functional layer which are stacked, the supporting layer comprises at least one of polycarbonate, polyether sulfone, thermoplastic polyurethane and a cycloolefin polymer; the functional layer comprises polyethylene glycol terephthalate and nano oligomeric silsesquioxane; the content of the nano oligomeric silsesquioxane accounts for 1%-5% of the total mass of the functional layer, and the nano oligomeric silsesquioxane comprises at least one of trisilanol isooctyl-POSS, trisilanol phenyl-POSS, octaphenyl-POSS and dodecaphenyl-POSS; the hydrophobic wear-resistant high-light-transmittance film is prepared through multi-layer co-extrusion, the light transmittance is 80% or above, and the water contact angle is larger than 100 degrees. The hydrophobic wear-resistant high-transparency film has excellent wear resistance, hydrophobicity, self-cleaning property and high transparency, and is especially suitable for the fields of consumer electronics, optical equipment, building materials, automobile industry and the like.

The invention provides a light response type mononuclear nickel / palladium complex for preparing ultra-high molecular weight polyethylene and a preparation method and application of the light response type mononuclear nickel / palladium complex, the structural formula of the light response type mononuclear nickel / palladium complex is as follows: # imgabs0 #. The light response type nickel / palladium complex provided by the invention has a rigid diphenylethylene skeleton and is converted from trans-configuration (E) to cis-configuration (Z) under irradiation of 365nm ultraviolet light; under the irradiation of 405nm ultraviolet light, a cis-configuration (Z) is converted into a trans-configuration (E). Therefore, the ratio of the E-type configuration to the Z-type configuration in the photoresponse type nickel complex can be accurately regulated and controlled by utilizing ultraviolet irradiation, and the photoresponse type nickel complex is used as a catalyst to regulate the reaction rate of two different sites in the olefin polymerization process, so that the molecular weight of a polyolefin material and the insertion rate of a polar monomer are regulated and controlled. The molecular weight distribution of the obtained ultrahigh molecular weight polyethylene is 1.60-2.57, and the molecular weight is 632-1184 * 10 < 4 > g.mol <-1 >. The catalyst has ultrahigh catalytic activity, can be used for producing high-performance polyethylene, can greatly reduce the production cost of the catalyst, and has great industrial application potential.

The invention discloses an oxide-enhanced, high-strength and high-temperature-resistant diaphragm and a preparation method thereof, and belongs to the technical field of battery diaphragms. The diaphragm is of a three-layer co-extrusion structure, a surface layer is composed of a block olefin polymer and a styrene elastomer, the block olefin polymer comprises soft chain segment polyethylene and hard chain segment polyolefin containing rigid groups, the styrene elastomer is a block copolymer with an (S) m-(P / B) n-(S) m microphase separation structure, and the thickness of the styrene elastomer is 1-10 micrometers. And the middle layer consists of high-density polyethylene and hydrophobically modified oxide. The preparation method comprises the following steps: synthesis of the block olefin polymer, three-layer co-extrusion sheet casting, two-way stretching, extraction drying, secondary transverse stretching and heat setting. Through molecular structure design and multiphase compounding, the mechanical strength, the membrane rupture temperature and the thermal stability of the diaphragm are synergistically improved, meanwhile, good electrolyte wettability and processing consistency are kept, the problems that a traditional wet-process diaphragm is poor in temperature resistance and insufficient in strength are effectively solved, and the safety of a lithium battery is remarkably improved.

The present invention relates to the field of olefin polymerization, and discloses an ethylene-cycloolefin copolymer and a preparation method thereof, the method comprises the following steps: ethylene and cycloolefin are subjected to a copolymerization reaction by using a catalyst composition, and the catalyst composition comprises the following components: a) a metallocene compound having a structure represented by a formula (1); b) a cocatalyst component, in the formula (1), M is a tetravalent transition metal atom; x1 and X2 are respectively and independently a halogen atom, an alkyl group with a carbon atom number of 1-10, an aryl group with a carbon atom number of 6-12 or an N, N-dialkyl amino group with a carbon atom number of 2-8. The catalyst composition provided by the invention has the advantages of high catalytic activity, good copolymerization performance and high molecular weight of the obtained polymer. # imgabs0 #

The disclosure relates to a metallocene complex of formula (I) wherein Mt is Zr or Hf; X is a sigma ligand; R1 are each independently, same or different from each other, C1-C20-hydrocarbyl, optionally containing up to two heteroatoms of Group 14-16 of the Periodic Table, or form together with the Si atom they are attached to a C4-C8-ring; R2 and R2' are each independently a C1-C10-hydrocarbyl, provided that at least one of R2 and R2' is an alpha-branched C3-C10-hydrocarbyl; n are each independently, same or different from each other, an integer from 1 to 5; R3 and R4 are each independently, same or different from each other, H, linear or branched C1-C6-alkyl, C7-C20-arylalkyl, C7-C20-alkylaryl, C6-C20-aryl, -OR31, SR31, or N(R31)2,with R31 being C1-C10-hydrocarbyl, whereby at least one R3 per phenyl group and at least one R4 is not H; R5 and R6 are each independently, same or different from each other, H or C1-C10- hydrocarbyl, or may form together with the C atoms they are attached to a C5-C7 carbocycle; R51' is C1-C10-hydrocarbyl; and R6' is C(R61)3, with R61 being linear or branched C1-C6-alkyl.

A process for the continuous production of a polyolefin polymer in a gas-phase polymerization reactor in the presence of a polymerization catalyst and an antistatic agent, including the steps of (a) providing a mixture of polyolefin particles and gas, (b) conveying the mixture through a pipe at a gas velocity of greater than or equal to 2 m / s, and (c) introducing an antistatic agent into the mixture.

The present invention relates to a solid Ziegler-Natta catalyst component for use in olefin polymerization. The catalyst component comprises magnesium, titanium, halide, one or more dicylopentyldialkoxysilane compounds, one or more dialkylaminotrialkoxysilane compounds, and one or more internal electron donors comprising urea, phthalate and 1,3-diether. The catalyst components, according to present invention, are able to produce polypropylene polymers having high isotacticity with high melt flow rate.

In general, a foamed antioxidant masterbatch is disclosed. The foamed antioxidant masterbatch comprises an olefin polymer and one or more organic phosphite antioxidants. The foamed antioxidant masterbatch comprises a cell structure comprising one or more cells. The one or more organic phosphite antioxidants is provided in the one or more cells. The present disclosure is also directed to a method of making a foamed antioxidant masterbatch using a foaming agent and a method of making a polymer composition from the foamed antioxidant masterbatch and a second polymer.

The invention provides an olefin polymer composition and application thereof, and relates to the technical field of composite materials. The olefin polymer composition is prepared from the following raw material components in parts by weight: 100 parts of an olefin polymer, 0.5 to 5 parts of an anthraquinone compound and 1 to 5 parts of aspartic ester resin, the structure of the aspartic ester resin contains C8-C24 alkylene and a polyethylene glycol chain segment. The olefin polymer composition has good hydrophilicity, and the treatment effect of the olefin polymer composition on nitrogen-containing sewage can be improved.

The present application relates to the technical field of olefin polymerization, and in particular to an ethylene / α-olefin copolymer and an application thereof, and a packaging adhesive film composition. The ethylene / α-olefin copolymer has the following characteristics: (a) the melting peak temperature measured by means of a differential scanning calorimeter (DSC) is 30-90°C, and the melting range width measured by means of the DSC is 75-90°C; and (b) dH(90) and dH(100) continuously measured by using the DSC and from nucleation / annealing (SSA), wherein 0≤dH(90)≤2J / g, and dH(100)=0. The ethylene / α-olefin copolymer of the present application has specific property characteristics, and when the polymer is used in an adhesive film processing process, a high degree of crosslinking is still maintained while the mixing time of the polymer and an auxiliary agent is shortened.

The present invention provides a process for producing a solid catalyst component without using internal electron donors, prepared by reacting an alkoxymagnesium compound with an acyl halide and / or sulfinyl halide and / or sulfonyl halide compound, and an alkanol and / or an alkanediol to form reaction product (A), optionally reacting the reaction product (A) with an organohalide and oranophosphorus compound to form reaction product (B), reacting the reaction product (B) with a halogen-containing titanium or vanadium compound to obtain the solid catalyst component (C). The solid catalyst component can be used in a olefin polymerization catalyst system to produce polypropylene polymers with high activity, high stereo-regularity, and good morphology.

The invention belongs to the technical field of olefin polymerization, particularly relates to an olefin copolymer, particularly relates to an ethylene-alpha-olefin random copolymer, and further discloses a preparation method and application thereof. The ethylene-alpha-olefin random copolymer provided by the invention is a random copolymer composed of ethylene and alpha-olefin, especially alpha-olefin with 3-8 carbon atoms, the leaching temperature ranges of the copolymer in the gradient heating leaching process are 25-40 DEG C and 45-120 DEG C, and the mass ratio of the leaching component in the temperature range of 25-40 DEG C is 0.5-5 wt%. The copolymer can be applied to the field of photovoltaic adhesive film application and has improved crosslinking and electrical insulation properties.