770 results about "Olefin polymerization" patented technology

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 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 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.

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.

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 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.

A process for the preparation of a procatalyst for preparing a catalyst composition for an olefin polymerization from a solution of R4zMgX42-z, wherein the solution of R4zMgX42-z is prepared by a process comprising the steps of: (i) reacting a magnesium powder with an organic halide in the presence of an organic solvent at a temperature of T1; (ii) stirring the reaction mixture obtained in step (i) for at least 1 hour at T1; (iii) raising the temperature of the reaction mixture obtained in step (ii) to a temperature T2; (iv) stirring the reaction mixture obtained in step (iii) for at least 1 hour at T2; (v) decanting or filtering the reaction mixture obtained in step (iv) to obtain a transparent solution of R4zMgX42-z in the organic solvent; Wherein T1 ranges from 70° C.-90° C., T2 ranges from T1+30° C. to T1+40° C.

This invention proposes a catalyst component, catalyst, and their applications for olefin polymerization, belonging to the field of olefin polymerization technology. The catalyst component contains products obtained from the reaction of a magnesium source, a titanium source, and an internal electron donor, wherein the internal electron donor comprises furan compounds and diether compounds. The catalyst of this invention exhibits high hydrogen sensitivity and stereoregulation, with a good balance between the two. The molecular weight distribution of the prepared low melt index polymer is broader than that of the high melt index polymer, and the catalyst component of this invention does not contain phthalate compounds (plasticizers).

According to the invention, rigid anthracene is introduced as a framework of bridged binuclear metal, a pyridylamino binuclear metal titanium-zirconium-hafnium catalyst is constructed, and the molecular weight of the obtained polymer can be effectively improved through the synergistic effect between the binuclear metal and the steric hindrance and electronic effect on the catalyst structure; the polyolefin elastomer (POE), the isotatic polypropylene (iPP) and the propenyl elastomer (PBE) are efficiently synthesized. The pyridylamino binuclear metal titanium-zirconium-hafnium catalyst has the advantages that synthesis is simple, raw materials are easy to obtain, and the product yield is high. In copolymerization of ethylene and alpha-olefin, the catalyst shows excellent activity (5.75 * 10 < 7 > g (POE). Mol <-1 > (M). H <-1 >) and alpha-olefin selectivity (the insertion rate reaches 16.2 mol%), and the polyolefin elastomer POE with excellent performance is prepared. In propylene polymerization, the regularity of the polypropylene chain segment can be effectively regulated and controlled by adjusting the steric hindrance and the electronic effect of the catalyst, and the regularity gt is prepared with high activity (3.84 * 10 < 7 > g (PP). Mol <-1 > (M). H <-1 >); and the polypropylene material with high stereoregularity is prepared from 80 mmmm% of polypropylene with high stereoregularity. In copolymerization of ethylene and propylene, an elastomer material which takes propylene as a main material, can regulate and control the ethylene content to be 5-50 wt% and has unique characteristics of a propylene-ethylene semi-crystalline copolymer is prepared. In addition, the pyridylamino binuclear metal titanium-zirconium-hafnium catalyst also shows excellent high-temperature resistance (higher than 160 DEG C), is suitable for high-temperature solution polymerization, and can be used for preparing high-performance polyolefin elastomers. Therefore, the invention has original innovation, and provides a new direction for the development of the field of polyolefin materials.

The present application relates to the field of olefin polymerization. Provided are an ethylene-α-olefin copolymer, a preparation method therefor, an encapsulant composition comprising the ethylene-α-olefin copolymer, and an encapsulant film formed by using the encapsulant composition. The ethylene-α-olefin copolymer has the following properties: the density is 0.860-0.905 g / cm3; according to a GPC test, the weight-average molecular weight is 20000-200000 g / mol with a unimodal distribution, and the molecular weight distribution polydispersity index (PDI) range is 2.3-3; and according to a TGIC test, said copolymer has two elution peaks, the temperature difference between the two peaks being 5-30 ℃, and the highest elution temperature in an obtained TGIC curve is not higher than 125 ℃. The ethylene-α-olefin copolymer is used for encapsulating solar cells, has relatively high mechanical properties, can shorten the mixing time of auxiliaries or improve the degree of crosslinking during processing, and exhibits a good performance in casting for film formation, thus effectively reducing the generation of fisheyes.

This invention relates to the field of olefin polymerization, and discloses a metallocene compound, a catalyst composition using the metallocene compound, an olefin polymerization method using the catalyst composition, and the application of the metallocene compound or the catalyst composition in olefin polymerization. The metallocene compound has the structure shown in formula (1), where M is a tetravalent transition metal atom; X 1 and X 2 Each group is independently a halogen atom, an alkyl group with 1-10 carbon atoms, an aromatic group with 6-12 carbon atoms, or an N,N-dialkylamine group with 2-8 carbon atoms. Using the catalyst composition of the present invention provides advantages such as high catalytic activity, good copolymerization performance, and high molecular weight of the obtained polymer.

The present invention relates to a polyolefin polymer, and a system and method for polymerizing same, the polymer having a density of 0.868 to 0.897 g / cm3, a melt flow index (MIE, 190°C with a load of 2.16 kg) of 0.1 g / 10 min to 20.0 g / 10 min, a PDI of 1 to 5, a number average molecular weight (Mn) of 20,000 to 70,000 g / mol, a weight average molecular weight (Mw) of 50,000 to 150,000 g / mol, and two or more melting temperatures (Tm).

A propylene (co) polymerization process carried out in the presence of (i) a Ziegler-Natta catalyst comprising Mg, Ti and an internal donor, (ii) an aluminum alkyl promoter, optionally (iii) an external donor, and (iv) a polymerization process aid (PPA) comprising a monoglyceride of a monounsaturated C16-C18 monocarboxylic acid, said component (iv) being used in an amount of at least 40 ppm based on the amount of polyolefin produced.

The invention discloses an internal electron donor for olefin polymerization, a catalyst component, a catalyst and application of the internal electron donor, the internal electron donor for olefin polymerization has a structure as shown in a formula I. In the formula I, R1 and R2 are the same or different and are independently selected from C1-C20 alkyl containing or not containing heteroatoms, and R1 and R2 are independently selected from C1-C20 alkyl containing or not containing heteroatoms. The heteroatom is one or a combination of more than two heteroatoms selected from H, N, O, S, P, Si and halogen; x is CH or N. The internal electron donor adopts a non-plasticizer internal electron donor, the prepared catalyst has high catalytic activity which is generally higher than that of common phthalate and diether internal electron donor catalysts in industry, and the polymer obtained by catalytic polymerization has the advantages of regular particle size, high bulk density, high isotacticity, small temperature fluctuation in a kettle during polymerization, and good stability. The reaction is stable and industrial production is facilitated.

Catalyst systems comprising a metal-ligand complex having a structure according to Formula (I): Y and Z are independently a monodentate or bidentate ligand selected from the group consisting of (C1−C30)hydrocarbyl, (C1−C30)heterohydrocarbyl, (C6-C30)aryl, (C3-C30)heteroaryl, halogen and –H. R1, R2, R3, and R4 are independently selected from the group consisting of (C1−C30)hydrocarbyl, (C1−C30)heterohydrocarbyl, (C6-C30)aryl, (C3-C30)heteroaryl, −ORC, −Si(RC)3, −Ge(RC)3, halogen, and –H; R5, R6, R7, and R8 are independently selected from the group consisting of (C1−C30)hydrocarbyl, (C1−C30)heterohydrocarbyl, (C6-C30)aryl, (C3-C30)heteroaryl, −ORC, −Si(RC)3, −Ge(RC)3, halogen, and –H; R9 and R10 are independently selected from the group consisting of (C1−C30)hydrocarbyl, (C1−C30)heterohydrocarbyl, (C6-C30)aryl, (C3-C30)heteroaryl, −ORC, −Si(RC)3, −Ge(RC)3, halogen, and –H; and each RC is independently selected from the group consisting of (C1−C30)hydrocarbyl, (C1−C30)heterohydrocarbyl, (C6-C30)aryl, (C3-C30)heteroaryl, and –H.

The invention provides a catalyst component for olefin polymerization, a catalyst, application of the catalyst and an olefin polymerization method, the catalyst component comprises magnesium, titanium, halogen and internal electron donor compounds, and the internal electron donor compounds comprise a first internal electron donor compound as shown in a general formula (I) and a second internal electron donor compound as shown in a general formula (II); wherein the molar ratio of the first internal electron donor compound to the second internal electron donor compound is 1: (0.01-100); the prepared catalyst component and the catalyst have high hydrogen regulation sensitivity when being used for olefin polymerization, the obtained polyolefin product has high melt index and isotactic index, and subsequent processing and product development are facilitated.

The invention discloses a method for preparing an aromatic phosphate salt nucleating agent by using nanoscale aluminum chloride, and belongs to the technical field of polymer nucleating agents. 2, 2-methylene-bis (4, 6-di-tert-butylphenol) and phosphorus oxychloride are used as raw materials, the nanoscale aluminum chloride with the particle size of 20-50nm is selected as an inorganic Lewis acid catalyst and acid binding agent, and the aromatic phosphate salt nucleating agent is prepared by using a one-step method. The preparation method comprises the following steps: replacing the traditional organic acid-binding agents such as triethylamine and pyridine, and synthesizing bis [2, 2 '-methylene bis (4, 6-di-tert-butylphenoxy) phosphate] hydroxyl sodium salt by a one-pot method of condensation, hydrolysis for salt removal and neutralization for salt formation; the purity of the product can reach 99% or above through one-time suction filtration, multiple times of washing are not needed, salt-containing wastewater can be recycled as industrial water after being neutralized, and the environmental protection pressure is greatly reduced; the nucleating agent is suitable for modification processing of polymers such as polypropylene (PP), polyethylene glycol terephthalate (PET), polybutylene terephthalate (PBT), polyamide (PA) and the like, and especially meets the strict requirements on the purity and environmental protection property of the nucleating agent in an olefin polymerization process.

The application discloses an electrolyte-resistant double-sided adhesive tape with an acrylic ultrathin substrate, which comprises, in sequence, a pressure-sensitive adhesive layer, a substrate layer and a hot melt adhesive layer; the substrate layer has a thickness of 0.2-1 microns; the pressure-sensitive adhesive layer has a thickness of 3.5-6.5 microns and comprises an alpha-olefin polymer, a modified polyolefin, a styrene block copolymer, a petroleum resin and a viscosity regulator; and the hot melt adhesive layer has a thickness of 3.5-6.5 microns and comprises an alpha-olefin polymer, a modified polyolefin, a styrene block copolymer and a petroleum resin. The application further provides a preparation method of the electrolyte-resistant double-sided multilayer adhesive tape with the ultrathin substrate, which comprises, in sequence, hot melt adhesive layer coating, substrate layer coating and pressure-sensitive adhesive layer coating. The multilayer adhesive tape has a relatively thin overall thickness, saves space for a battery and improves the energy density of the battery, has excellent bonding performance, electrolyte resistance and flexibility, can improve the drop resistance of the battery and ensures long-term safe use of the battery.

The invention discloses a catalyst component for olefin polymerization, a catalyst, a preparation method and application, and relates to the technical field of olefin polymerization catalysts. The catalyst component comprises reaction products of the following components: a magnesium-containing compound solution, an organic anhydride compound, a titanium compound, an acetate compound, a first alcohol compound and an aromatic ester compound, in the catalyst component, the molar ratio of the magnesium element to the organic anhydride compound to the titanium compound to the acetate compound to the first alcohol compound to the aromatic ester compound is 1: (0.01-1): (2-30): (0.01-10.0): (0.05-10.0): (0.01-5.0). The catalyst component prepared by the preparation method provided by the invention is concentrated in particle size distribution, the catalyst containing the catalyst component has higher polymerization activity, the hydrogen regulation sensitivity under the condition of high hydrogen-ethyl ratio is greatly improved, the hydrogen regulation sensitivity under the condition of low hydrogen-ethyl ratio is moderate, and the catalyst component is suitable for industrial production. The catalyst can catalyze ethylene polymerization to obtain powder particles with high bulk density, the content of fine powder with the size smaller than 75 microns in the polymerized powder is greatly reduced, and almost no fine powder exists.

One embodiment of the present invention pertains to pellets. The pellets contain an alpha-olefin polymer (C) and are characterized in that an oil-based liquid (A) and a fatty acid amide (B) having an average particle size of 110 μm or less adhere to the surface of the pellet bodies [I], the amount of the oil-based liquid (A) adhered on the surface of the pellet bodies [I] is 0.025-0.22 mass% relative to the total pellet mass, and the amount of the fatty acid amide (B) adhered on the surface of the pellet bodies [I] is 0.015-0.28 mass% relative to the total pellet mass.

The invention provides an alpha-diimine ligand compound, an alpha-diimine nickel catalyst and a preparation method and application of the alpha-diimine ligand compound and the alpha-diimine nickel catalyst, and belongs to the technical field of organic synthesis. Wherein R1 is selected from hydrogen, methoxyl or tertiary butyl; r2 is selected from methyl, ethyl or isopropyl; and R3 is selected from hydrogen or methyl. The alpha-diimine nickel catalyst prepared by adopting the alpha-diimine ligand compound can catalyze olefin to carry out homopolymerization reaction or copolymerization reaction, so that not only is excellent catalytic performance shown, but also a polyolefin material obtained by catalyzing olefin monomer homopolymerization reaction has excellent elastic recovery performance; and the catalyst has certain application potential in olefin polymerization industry.

The application discloses a kind of high olefin dry dehydration bed regeneration and cryogenic recovery process, belong to chemical separation and purification technical field, the process includes six steps of bed emptying, cold inert medium purging, heating desorption, staged cryogenic condensation recovery, bed cooling, pressure charging standby in sequence, maximum recovery free olefin by pre-emptying and purging step, inhibit high temperature polymerization, core uses staged cryogenic condensation recovery process to olefin component in desorption gas is condensed and recovered gradually, the loss problem of olefin material direct discharge flare in traditional process is solved, effectively inhibit olefin polymerization, by pre-cold inert medium purging step, remove the free olefin remaining in bed, cooperate with desorption temperature control and oxygen-free inert atmosphere throughout, avoid the occurrence of olefin polymerization reaction under high temperature condition, prevent the damage of green oil generation to adsorbent and equipment.

This invention relates to the field of olefin polymerization, and discloses a metallocene compound, a catalyst composition using the metallocene compound, an olefin polymerization method using the catalyst composition, and the application of the metallocene compound or the catalyst composition in olefin polymerization. The metallocene compound has the structure shown in formula (1), where M is a tetravalent transition metal atom; X 1 and X 2 Each group is independently a halogen atom, an alkyl group with 1-10 carbon atoms, an aromatic group with 6-12 carbon atoms, or an N,N-dialkylamine group with 2-8 carbon atoms. Using the catalyst composition of the present invention provides advantages such as high catalytic activity, good copolymerization performance, and high molecular weight of the obtained polymer.

The application discloses an olefin polymerization catalyst and a preparation method thereof, and the olefin polymerization catalyst is used for preparing a polypropylene thermoplastic elastomer, and the olefin polymerization catalyst contains silicon tetrachloride modified silicon dioxide, a transition metal component and a non-transition metal component; the transition metal component is titanium tetrachloride and / or titanium alkoxy, and the non-transition metal component is a magnesium-containing compound. The olefin polymerization catalyst has high initial activity and overall activity, and polypropylene particles with high porosity are obtained. The catalyst can obtain a polypropylene thermoplastic elastomer with high rubber content in the synthesis process of the polypropylene thermoplastic elastomer.

The invention relates to the technical field of olefin polymerization catalysts, and discloses a catalyst composition and an olefin polymerization method. The catalyst composition contains a first metal complex as shown in a formula (I), a second metal complex as shown in a formula (II), a chain shuttling agent and a cocatalyst. The olefin polymerization method comprises the step of carrying out olefin polymerization reaction on an olefin monomer in the presence of the catalyst composition. The catalyst composition provided by the invention still has relatively high polymerization activity at a high temperature (such as 80 DEG C).

The invention provides a catalyst component for olefin polymerization, a preparation method and application of the catalyst component, a catalyst containing the catalyst component and used for olefin polymerization and application of the catalyst. The catalyst component comprises a reaction product of a sulfur-containing magnesium compound as shown in a formula (I), a titanium compound and an internal electron donor compound, in the formula (I), R1 is selected from C1-C8 alkyl groups or C3-C8 cycloalkyl groups; r2 and R3 are the same or different and are independently selected from hydrogen or C1-C5 alkyl groups, and hydrogen on the alkyl groups can be optionally substituted by halogen atoms; x is halogen, preferably chlorine or bromine; m ranges from 0.1 to 1.9, n ranges from 0.1 to 1.9, and m + n = 2, 0lt; q < = 0.5; the internal electron donor compound comprises a 1, 3-diether compound and an aminophenol compound. When the catalyst component for olefin polymerization provided by the invention is used for olefin polymerization, the hydrogen regulation sensitivity is relatively low, the stable control of the melt index of the product is facilitated, and the melting point of the prepared polymer product is lower.

The present disclosure relates to a solid component for producing an olefin polymerization catalyst, its production method, and its use. The solid component contains (i) a magnesium compound represented by the following formula (1), (ii) a Lewis base (LB), and (iii) optionally a metal component other than magnesium, where LB is a compound represented by the general formula (II) or an amide compound represented by the general formula (II'). The solid component produced in the present invention has a good particle morphology, and a catalyst produced by using the solid component as a support is less likely to be crushed and has better stereostructure orientation in olefin polymerization, particularly propylene polymerization or copolymerization. [Formula 1] JPEG2023546624000060.jpg41169

The application relates to the chemical technology field and discloses a metallocene compound, a preparation method and a metallocene catalyst and application thereof. The metallocene compound provided by the application comprises a fluorenyl ligand, a metallocene ligand, a bridging structure and a metal part in a chemical structure. By introducing an adsorption group with a micropore effect into the fluorenyl ligand, the metallocene compound can exhibit strong saturated adsorption capacity when interacting with cocatalysts such as organic boron and organic aluminum, the cocatalyst concentration around the metal center can be improved, the activity and thermal stability of the catalyst can be significantly enhanced, the metallocene compound can catalyze alpha-olefin polymerization with high activity, the amount of the cocatalyst is reduced, and the production cost of polyolefin is reduced.

The present invention relates to a hybrid catalytic composition comprising different transition metal compounds, to a catalyst for olefin polymerization comprising the same, and to processes for preparing the same. Specifically, the present invention relates to a hybrid catalytic composition comprising different transition metal compounds capable of producing various polyolefins having excellent processability and mechanical properties, to a catalyst for olefin polymerization comprising the same, and processes for preparing the hybrid catalytic composition and the catalyst by adjusting the ratio of the transition metal compounds.