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133 results about "Solution polymerization" patented technology
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Solution polymerization is a method of industrial polymerization. In this procedure, a monomer is dissolved in a non-reactive solvent that contains a catalyst. The reaction results in a polymer which is also soluble in the chosen solvent. Heat released by the reaction is absorbed by the solvent, and so the reaction rate is reduced. Moreover, the viscosity of the reaction mixture is reduced, not allowing autoacceleration at high monomer concentrations. Decrease of viscosity of reaction mixture by dilution also helps for the heat transfer, one of the major issues connected with polymer production as most of polymerizations are exothermic reactions. Once the maximum or desired conversion is reached, excess solvent has to be removed in order to obtain the pure polymer. Hence, solution polymerization is mainly used for applications where the presence of a solvent is desired anyway, as is the case for varnish and adhesives. Other application of polymer solutions is a manufacture of fibers by wet or dry spinning. It is not useful for the production of dry polymers because of the difficulty of complete solvent removal.
All-steel snow tire tread and preparation method thereof
The present application provides an all-steel snow tire tread, consisting of the following raw materials in parts by weight: 50-80 parts of natural rubber, 20-50 parts of solution polymerized styrene butadiene rubber with dual glass transition temperatures, 40-60 parts of carbon black, 10-20 parts of white carbon black with a high specific surface area, 1-2.5 parts of silane coupling agent, 5-10 parts of modified anti-wet skid resin, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of anti-aging agent 4020, 1-3 parts of anti-aging agent RD, 1-3 parts of protective wax, 1-1.8 parts of sulfur, and 1-1.5 parts of promoter NS.
Owner:SHANDONG LINGLONG TIRE CO LTD
Phosphorus-nitrogen coordinated metallocene compound as well as preparation method and application thereof
The invention provides a phosphorus-nitrogen coordinated metallocene compound and a preparation method and application thereof, the compound has a structure as shown in a formula I: in the formula I, M is selected from IVB group metals in the periodic table of elements; r1 is selected from hydrogen, halogen, C1-C10 direct or branched alkyl, and C1-C3 alkoxy; r2 is selected from hydrogen and C1-C6 straight chain or branched chain alkyl; y is selected from chlorine, C1-C3 alkyl substituted or unsubstituted by trimethylsilyl, and amino substituted by trimethylsilyl. The phosphorus-nitrogen coordinated metallocene compound provided by the invention has relatively high thermal stability, catalytic activity and comonomer insertion rate, and can realize high-temperature solution polymerization of ethylene and norbornene.
Owner:PETROCHINA CO LTD
Amphiphilic uniform osmotic oil-displacing agent, preparation method and application, and enhanced oil recovery method
This invention discloses an amphiphilic uniform penetration inhibitor oil displacement agent, its preparation method, its application, and a method for improving oil recovery. The preparation method of the amphiphilic uniform penetration inhibitor oil displacement agent comprises the following steps: In the presence of an initiator and a solvent, sodium styrene sulfonate, acrylamide, N-ethoxymethyl-N-isobutoxymethylacrylamide, and 3-acetamino-N-ethyl-N,N-dimethylpropyl-1-amine undergo a solution polymerization reaction. The molar ratio of sodium styrene sulfonate, acrylamide, N-ethoxymethyl-N-isobutoxymethylacrylamide, and 3-acetamino-N-ethyl-N,N-dimethylpropyl-1-amine is 1:0.01–25:0.01–50:0.01–50. The solution polymerization reaction results in an amphiphilic uniform penetration inhibitor oil displacement agent with a viscosity-average molecular weight of 35 million to 40 million.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Irradiation cross-linked biodegradable composite plastic straw and preparation method thereof
The invention discloses an irradiation cross-linked biodegradable composite plastic straw and a preparation method thereof. The irradiation cross-linked biodegradable composite plastic straw is prepared from the following raw materials in percentage by mass: 40-80% of polylactic acid, 15-45% of nano inorganic filler, 0.4-1% of chain extender, 1-3% of flexibilizer, 1-3% of lubricant, 0.3-1% of nucleating agent, 0.3-1% of coupling agent, 1-10% of cross-linking agent and 0.3-1% of compatilizer. The chain extender is an epoxy group chain extender copolymer which contains 6-9 epoxy functional groups and is formed by copolymerizing glycidyl methacrylate, styrene and acrylic acid low-carbon alcohol ester through a solution polymerization or suspension polymerization process. The heat resistance of the polylactic acid composite plastic can be improved through irradiation processing, the polylactic acid composite plastic straw has higher heat resistance and does not deform in a high-temperature use environment, and pathogenic bacteria and viruses in a product are killed in the irradiation crosslinking process at the same time.
Owner:SHANGHAI JUNER NEW MATERIALS +1
Multi-cross-linked network polymer binder as well as preparation method and application thereof
The invention belongs to the field of organic synthesis, and discloses a preparation method of a multi-cross-linked network polymer binder for a silicon / graphite negative electrode of a lithium ion battery. The preparation method comprises the following steps: taking an acrylic acid structural unit, a hexafluorobutyl acrylate structural unit, an acrylamide structural unit and a cross-linking agent structural unit as polymerization monomer units; the polymer is prepared through a free radical solution polymerization reaction based on photo-initiation. A photo-initiation system is adopted, a crosslinking process is controllable and multiple crosslinking is realized through a composite crosslinking system, a stable three-dimensional network based on physical crosslinking (hydrogen bonds) and chemical crosslinking (a covalent crosslinking network constructed by a strong crosslinking agent and a weak crosslinking agent) is finally constructed, formation of SEI is regulated in situ in the circulation process, and the three-dimensional network has the advantages of being simple in preparation process, low in cost and high in repeatability. Therefore, the electrochemical performance of the silicon / graphite (Si / Gr) composite negative electrode is obviously improved. In addition, the invention also provides the polymer prepared on the basis of the method and application.
Owner:SHENZHEN UNIV
A solution process for producing polyolefins
ActiveCN120900567BChemical industryChemical/physical/physico-chemical stationary reactorsPolyolefinHeat transfer efficiency
The application belongs to the technical field of solution preparation device, and provides a reaction device for preparing polyolefin by solution method.The reaction device comprises a barrel and a stirrer, the axis center of the barrel of the reaction device is provided with the stirrer, at least two groups of first heat exchangers are arranged in the barrel of the reaction device in a ring shape, the first heat exchanger comprises at least two vertical heat exchange pipes, the inlet and outlet of the first heat exchanger are located at the bottom of the reaction device, the outer wall of the barrel of the reaction device is attached with a second heat exchanger, and a baffle pipe is axially inserted into the gap between the first heat exchanger and the inner wall of the barrel of the reaction device, and the baffle pipe can destroy the flow boundary layer on the surface of the first heat exchanger and the inner wall of the barrel of the reaction device.The application aims to solve the problems of low mass transfer and heat transfer efficiency, uneven mixing, local overheating, wall hanging, fouling and poor discharge of the high viscosity solution polymer, and the problems of large number of heat exchange components in the reactor and difficult structure design.
Owner:浙江智英石化技术有限公司
High-pressure salt water invasion resistant fluid loss additive and preparation method thereof
ActiveCN118791668BIncrease protective gel effectensure stabilityDrilling compositionMorpholinePhysical chemistry
This application discloses a high-pressure brine-resistant filtration loss reducer and its preparation method, belonging to the field of oil and gas well drilling engineering. Based on the requirements for resistance to complex salts, especially calcium and magnesium, this application optimizes the molecular structure of the high-pressure brine-resistant filtration loss reducer and introduces an acryloylmorpholine monomer, significantly improving its temperature resistance, stability, and salt tolerance. Since the copolymerization reaction of the selected monomer is relatively simple, the polymerization reaction adopts free radical solution polymerization. The prepared filtration loss reducer has achieved good performance in both laboratory and field application evaluations.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
A polycation-pi antibacterial agent and a preparation method and application thereof
The application belongs to the technical field of antibacterial agents, and relates to a polycation-pi antibacterial agent and a preparation method and application thereof. The antibacterial agent has a controllable sequence structure, a polymer main chain is composed of alternating hydrophobic segments and hydrophilic segments, guanidine salts are regularly arranged, surface positive charges are concentratedly distributed, and multiple interactions of cation-pi, hydrogen bonds and pi-pi stacking can be generated between molecules of the antibacterial agent. The preparation method is as follows: under catalyst or non-catalyst conditions, polycation guanidine salts and compounds with benzene rings in a molar ratio of 0.8-1.2:1 are subjected to melt polymerization or solution polymerization, and the polycation-pi antibacterial agent is obtained. The application is that the antibacterial agent is used to finish fabric to obtain antibacterial fabric, and the fabric is made of hydrophobic fibers. The preparation method of the antibacterial agent is simple, and the antibacterial fabric with durable antibacterial, directional moisture permeability and refrigeration effect can be prepared by using the antibacterial agent.
Owner:DONGHUA UNIV
Reactor-blended ethylene polymer compositions and films produced therefrom
The present invention provides a reactor-blended ethylene polymer composition comprising at least two identifiable components having different structural and compositional properties, namely a first ethylene polymer and a second ethylene copolymer. The ethylene polymer composition is produced by a continuous solution polymerization process, wherein the first ethylene polymer is formed by polymerizing ethylene and optionally at least one α-olefin in a first solution polymerization reactor using a first homogeneous catalyst composition, and the second ethylene copolymer is formed by polymerizing ethylene and at least one α-olefin in a second solution polymerization reactor using a second homogeneous catalyst composition. The ethylene polymer composition of the present invention can be advantageously used in applications where an easily openable single-material packaging system is required.
Owner:NOVA CHEM (INT) SA
Intrinsic flame-retardant low-dielectric epoxy resin and preparation method thereof
The invention relates to an intrinsic flame-retardant low-dielectric epoxy resin. The molecular structure of the epoxy resin comprises a) a biphenyl group, and at least one of b) a polyphenylene oxide (PPO) group, c) a polyether sulfone (PES) group or d) a polyamide imide (PAI) group. The preparation method comprises the following steps: dissolving biphenyl epoxy resin in a solvent, adding a polymer with an active group, adding independently or in a certain proportion in a combined manner, fully dissolving, adding a catalyst, heating, and carrying out solution polymerization; and after the reaction is finished, supplementing the solvent to prepare the solvent type modified epoxy resin. The obtained product can improve the limit oxygen index of the epoxy resin, reduce the dielectric constant Dk and the dielectric loss factor Df, realize a greener and more environment-friendly flame-retardant target, and better adapt to the performance requirements of high-end electronic products on high-speed transmission and low loss of electric signals.
Owner:ANHUI POLYMER NEW MATERIALS CO LTD
Process for solution polymerization of ethylene-alpha-olefin copolymers using transition metal compounds
The solution polymerization method for an ethylene-alpha-olefin copolymer of the present invention can provide an ethylene-alpha-olefin copolymer having a low density of 0.90 g / cc or less and a broad molecular weight distribution of 2.0 or more, and can also produce ethylene-alpha-olefin copolymers having significantly different molecular weights according to the amount of hydrogen introduced.
Owner:HANWHA SOLUTIONS CORP
Fluoropolymer production method and fluoropolymer
A method for producing a fluoropolymer by solution polymerization or dispersion polymerization, the method including: in the presence of an initiator, a chain transfer agent, and a solvent, (i) homopolymerizing tetrafluoroethylene; or (ii) randomly copolymerizing tetrafluoroethylene and at least one of a monomer represented by the following formula (1) or a monomer represented by the following formula (2). The chain transfer agent includes at least one selected from dithioester compounds, dithiocarbamate compounds, trithiocarbonate compounds and xanthate compounds. The fluoropolymer contains 50 to 100 mol % of a polymerized unit based on the tetrafluoroethylene. The formula (1): CF2═CR1R2 wherein R1 and R2 are as defined herein, the formula (2): CH2═CR3R4 wherein R3 and R4 are as defined herein.
Owner:DAIKIN INDUSTRIES LTD
High-cohesion OCA optical pressure-sensitive adhesive and preparation method thereof
The invention discloses a high-cohesion OCA optical pressure-sensitive adhesive and a preparation method thereof. The high-cohesion OCA optical pressure-sensitive adhesive is obtained by dissolving a raw material containing a triblock copolymer in a dispersion medium, coating to form a film and drying, the triblock copolymer is in reversible addition fragmentation chain transfer solution polymerization, the structural general formula of the triblock copolymer is (M1-ran-M2)-b-(M3-ran-M4)-b-(M5-ran-M6), and M1 and M5 are composed of hard monomers; m3 is composed of soft monomers; m2, M4 and M6 are composed of functional monomers; the mass content of the hard monomer in the triblock copolymer is 3-20%, the mass content of the soft monomer is 70-85%, and the mass content of the functional monomer is 8-30%. According to the invention, the segmented copolymer with high functional monomer content is designed, monomers containing hydroxyl, carboxyl, amino and other functional groups are embedded into the copolymer structure, the cohesion of the polymer is obviously improved, the bonding performance, heat resistance and the like of the prepared optical adhesive are greatly improved, and the OCA optical pressure-sensitive adhesive with excellent comprehensive performance is obtained.
Owner:HANGZHOU ENTRON MATERIALS CO LTD
A polyamide aerogel film with a coordination-covalent double crosslinking network structure and a preparation method and application thereof
PendingCN122252048ALarge specific surface areaGuaranteed mechanical strengthSemi-permeable membranesWater/sewage treatment bu osmosis/dialysisEnd-groupOrganic base
The present application relates to a kind of polyamide aerogel film with coordination-covalent double crosslinking network structure and its preparation method and application, with carboxyl-containing diamine, carboxyl-free diamine, diacyl chloride and blocking agent as raw material, solution polymerization is carried out in the presence of organic base, and the polyamide oligomer solution containing polymerizable double bond in end group is obtained;The purified and dried polyamide oligomer is dissolved in aqueous solution containing organic base, and metal salt is added to form coordination crosslinking hydrogel film, and double crosslinking network is constructed by initiating end group double bond polymerization by ultraviolet irradiation, and finally freeze-dried to obtain polyamide aerogel film.The polyamide aerogel film of the present application has high porosity, excellent flexibility and mechanical stability, can efficiently and selectively adsorb heavy metal ions in water body, and can be regenerated efficiently and recycled multiple times by mild acid desorption-alkali activation combined regeneration process, aiming at providing a kind of high-performance, low-cost and sustainable solution for water treatment and environmental remediation field.
Owner:TONGJI UNIV
High-temperature oil resistant acrylic adhesive and preparation method thereof
The invention discloses a high-temperature oil resistant acrylic adhesive and a preparation method thereof, and belongs to the technical field of polymer adhesives. The preparation method comprises the following steps: adding a hard monomer, a soft monomer, a functional monomer, a photoinitiator and a chain transfer agent into an organic solvent, introducing nitrogen, uniformly stirring, and reacting under UV illumination to obtain a UV copolymer, the conversion rate of the UV copolymer is 5-20%, and the molecular weight range is 6000-30w; the preparation method comprises the following steps: adding the UV copolymer, the soft monomer, the functional monomer and the chain transfer agent into the organic solvent, heating, reacting, preserving heat, adding the thermal initiator, preserving heat, cooling and discharging to obtain the adhesive. According to the invention, the UV polymer and the solution are polymerized and reacted together, so that the compatibility of the glue and a polymer with certain regularity is improved, the conversion rate of the glue is improved, the oil resistance of the glue is improved through UV polymerization and solution thermal polymerization reaction, and the flexibility and temperature resistance of a glue film are improved.
Owner:WUXI SHUNXUAN PHOTOELECTRIC TECH CO LTD +2
A polypropylene resin and a method for producing the same, a polypropylene material
The application discloses a polypropylene resin and a preparation method and polypropylene material thereof. The polypropylene resin is a binary copolymer of propylene and 1-hexene, and the impact strength at -20 DEG C is 3-7 KJ / m 2 . The polypropylene resin is prepared by a solution polymerization method, and a Ziegler-Natta catalyst containing titanium is used, including a main catalyst, a cocatalyst and an external electron donor. The internal electron donor in the main catalyst includes a dibasic acid ester compound and a 1,3-diether compound. The polypropylene resin itself has high low-temperature impact strength and low haze. By adding an antioxidant, an acid remover and a transmittance enhancer into the polypropylene resin base at the same time, the prepared polypropylene material has the characteristics of high low-temperature impact strength, high transparency and low ash content, and can meet the preparation of injection-molded products in the fields of medical tube materials, medical packaging and food packaging, etc. which have high requirements on low-temperature impact and transparency.
Owner:PETROCHINA CO LTD
A method for long-chain branching modification of rare-earth isoprene rubber and / or butadiene isoprene rubber
PendingCN122103413AStrong branching effectControllable branching reactionsActive polymerPolymer science
The present application relates to the field of polymer manufacturing, and particularly relates to a long-chain branched modification method of rare earth isoprene rubber and / or butadiene rubber, comprising the following steps: S1. performing solution polymerization of isoprene and / or butadiene and isoprene in a non-polar solvent in the presence of a rare earth catalyst to obtain a glue solution containing active polymer molecular chains; S2. when the conversion rate of the polymerization reaction reaches 95% or more, adding a compound branched modifier to the glue solution to perform a branched reaction; wherein the compound branched modifier comprises at least one of a chloride and an alkyl halide and at least one selected from ether compounds and tertiary amine compounds. The branched modifier used in the present application has a strong branching effect, and has good solubility so as to achieve uniform mixing at a molecular level in the glue solution, significantly alleviates the gel side reaction, reduces the gel content, narrows the molecular weight distribution, significantly improves the raw rubber performance, and improves the product uniformity.
Owner:ZHONGZHE (ZHEJIANG) POLYMER NEW MATERIALS CO LTD
Water-absorbing resin and its manufacturing method
This invention provides a water-absorbing resin and a method for manufacturing the same. The method includes subjecting a water-absorbing resin composition to a free radical polymerization reaction to obtain a gel, wherein the water-absorbing resin composition comprises an unsaturated monomer aqueous solution, a polymerization initiator, and a free radical polymerization crosslinking agent. The method further includes shearing the gel using a shredder to obtain multiple water-absorbing resin particles, wherein the shredder's outlet includes blades and a perforated disc, the blades having a parallelogram cross-section, and the perforated disc containing multiple holes. The method also includes performing a surface crosslinking reaction on the water-absorbing resin particles to obtain the water-absorbing resin. This improves the surface porosity, absorption rate, and liquid conductivity of the obtained water-absorbing resin.
Owner:TAIWAN SOKOU INDS KOFUN YUUGENKOUSHI
Preparation method of double-end modified solution polymerized styrene-butadiene rubber
PendingCN121779628ASpecial tyresRolling resistance optimizationPolymer scienceSolution polymerization
The invention provides a preparation method of double-end modified solution polymerized styrene-butadiene rubber. The preparation method comprises the following steps: carrying out anion solution polymerization reaction on aromatic ethylene and conjugated diene in a solvent by taking organic lithium as a reaction initiator and a Lewis base compound as a randomization auxiliary agent; an amino alkoxy silane coupling agent is added for a coupling reaction; and adding a terminator to finish the reaction, adding an antioxidant, and carrying out gas stripping and drying to obtain a solution polymerized styrene-butadiene rubber product. When the styrene-butadiene rubber prepared by the method is applied to a tire tread, the tire can simultaneously obtain excellent characteristics of low rolling resistance and high wet skid resistance, and the styrene-butadiene rubber is excellent in physical and mechanical properties and suitable for green tire tread rubber.
Owner:WANHUA CHEM GRP CO LTD
A polyamide resin and a method for producing the same
The application provides a kind of polyamide resin and its preparation method.The preparation method includes the following steps: after mixing polyamide 66 salt solution and emulsion containing yellowing-resistant lubricant, polymerization reaction is carried out to obtain the polyamide resin;Or, add emulsion containing yellowing-resistant lubricant during the polymerization of polyamide 66 salt solution, and carry out polymerization reaction to obtain the polyamide resin.The application designs the preparation method of polyamide resin, and further adds emulsion containing yellowing-resistant lubricant before or during the polycondensation of polyamide 66 salt, so that the yellowing-resistant lubricant can be uniformly dispersed in the polyamide, and a polyamide resin with high lubricity and good yellowing resistance is obtained, avoiding the problem of adverse effects of secondary processing on the physical and chemical properties of polyamide.
Owner:HUAFON GROUP
A method for preparing colored meta-aramid fibers
ActiveCN117248292BPigment addition to spinning solutionMonocomponent polyamides artificial filamentPolymer sciencePolyamide
This invention discloses a method for preparing colored meta-aramid fibers: (1) Under dry N2 protection, pigments treated with m-phenylenediamine and terminal amino aromatic hyperbranched polyamide are added to a solvent for dispersion, and 90%–95% isophthaloyl chloride is added for pre-condensation reaction; (2) the remaining isophthaloyl chloride is added for condensation reaction; (3) the chlorine is neutralized to obtain a meta-aramid resin solution; (4) the colored meta-aramid resin solution is used to make colored meta-aramid fibers. This invention uses terminal amino aromatic hyperbranched polyamide to treat pigments, and then combines m-phenylenediamine and isophthaloyl chloride through in-situ solution polymerization. The prepolymer can react with the terminal amino groups of the terminal amino aromatic hyperbranched polyamide adsorbed on the pigment surface, and then continue to undergo chain-growth condensation reaction, which can fundamentally and effectively prevent pigment agglomeration, thereby ensuring the mechanical properties of the fiber.
Owner:ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY CO LTD
A modulus uv-controllable dual-curing conductive adhesive film and a preparation method and application thereof
PendingCN122127912AEster polymer adhesivesPressure sensitive film/foil adhesivesPolymer scienceFirming agent
The application discloses a modulus UV-controllable double-curing conductive adhesive film and a preparation method and application thereof, and belongs to the technical field of electronic packaging materials. The conductive adhesive film comprises an A component, a B component and a conductive filler. The A component comprises a functional acrylate copolymer prepared from a monomer mixture through solution polymerization. The monomer mixture comprises soft monomers, hard monomers, hydroxyl-containing monomers, epoxy-containing monomers, polymerizable benzophenone photoinitiators, silane coupling agents and free radical polymerization initiators. The B component comprises one or a combination of latent epoxy curing agents, conductive accelerators, curing accelerators and anti-settling agents. The application completely solves the problem of oxygen inhibition, realizes controllable adjustment of the modulus and pressure sensitivity of the adhesive film, has no small molecule residue, has excellent conductive performance and good storage stability.
Owner:NANTONG GAOMENG NEW MATERIAL
Palladium-inlaid porous carbon-coated honeycomb ceramic monolithic catalyst and preparation and application thereof
PendingCN121819813AOrganic compound preparationCatalyst activation/preparationPtru catalystPorous carbon
The invention discloses a palladium-inlaid porous carbon-coated honeycomb ceramic monolithic catalyst as well as preparation and application thereof. The preparation method of the catalyst comprises the following steps: stirring and mixing phenol, a formaldehyde aqueous solution and sodium hydroxide, then adding a solution containing a palladium source, and polymerizing to obtain a phenolic resin reaction solution containing palladium; then immersing the cordierite honeycomb ceramic in a phenolic resin reaction solution containing palladium for 8-16 hours, taking out the cordierite honeycomb ceramic, blowing away redundant phenolic resin in pore channels of the cordierite honeycomb ceramic, then carrying out first-stage curing and second-stage roasting on the honeycomb ceramic in a nitrogen-oxygen mixed atmosphere, and then carrying out high-temperature carbonization in a nitrogen atmosphere, so as to obtain the catalyst. And cooling to obtain the palladium-inlaid porous carbon-coated honeycomb ceramic monolithic catalyst. The invention provides an application of the palladium-inlaid porous carbon-coated honeycomb ceramic monolithic catalyst in a selective catalytic hydrogenation reaction of chloronitrobenzene to generate chloroaniline. The catalyst provided by the invention has the advantages of low loading capacity, low cost and high stability.
Owner:ZHEJIANG UNIV OF TECH
Polyolefin materials, methods for their preparation and their use
The application relates to a preparation method of a polyolefin material and application thereof, and the preparation method comprises the following steps: carrying out solution polymerization reaction on ethylene, functional monomer A and functional monomer B in a solvent in the presence of a phosphorus sulfonic acid nickel catalyst, carrying out devolatilization drying after the reaction is completed, and granulating to obtain the polyolefin material; the polymer obtained by the preparation method has excellent polarity, the polarity of the polyolefin and the compatibility with other materials are improved, the bonding performance and the surface tension are increased, and the polyolefin material can be applied to multiple fields such as polymer modification and solar power generation.
Owner:WANHUA CHEM GRP CO LTD
Device and process for preparing a feed stream for solution polymerization
A feeding device for preparing a feed stream for a solution polymerization, comprising a feed vessel, the feed vessel comprising a top zone and a bottom zone; a feed outlet for withdrawing the feed stream, wherein the feed outlet is fluidly connected with the bottom zone; a waste outlet for withdrawing a waste vapor stream, wherein the waste outlet is fluidly connected with the top zone; an absorber positioned below the top zone; a first inlet for introducing a fresh liquid stream into or on top of the absorber, wherein the first inlet is fluidly connected with the absorber; a first heat exchanger positioned upstream of the first inlet for cooling the fresh liquid stream prior to introducing the fresh liquid stream into or on top of the absorber; a second inlet for introducing a recycle liquid stream, wherein the second inlet is positioned below the first inlet; and a third inlet for introducing a recycle vapor stream, wherein the third inlet is positioned below the second inlet and above the feed outlet, wherein the feed vessel does not comprise a heat exchanger in the top zone.
Owner:BOREALIS GMBH
Polymeric surfactant for oil displacement and synthesis method thereof
The invention discloses a polymer surfactant for oil displacement, and relates to the field of tertiary oil recovery. The problem that the oil displacement efficiency and the swept volume of an existing common polymer in a class III oil layer are not obviously improved in the oil layer is mainly solved. The molecular structural formula is as shown in formula (1), wherein R is H or CH3; r1 = H, CH3 or (CH2CH2O) yCH3, and y is in the range of 1 to 20; r2 = CXaCX3, X is halogen, a is 0-2, n, m and p are polymerization degrees, and the numerical ranges of n, m and p are as follows: n is 1-100000, m is 1-20000 and p is 1-30000; the synthesis method comprises the following step: synthesizing the surfactant for oil displacement from a raw material comprising a polymerizable surface active monomer by adopting a photo-initiation solution polymerization method or a reversed-phase suspension polymerization method. The polymer surfactant can be used as a tertiary oil recovery oil-displacing agent, has high viscosity in sewage, has certain surface activity, and can be used for further improving the recovery efficiency after tertiary oil recovery and polymer flooding of medium and low permeability oil layers.
Owner:PETROCHINA CO LTD
An agent for inhibiting the generation of black particles in a polyethylene pelletizing process and a method for preparing the same
The present application relates to the technical field of polyethylene production, in particular to an additive for inhibiting black particles generated in the polyethylene granulation process and a preparation method thereof. The additive comprises the following components: vinylidene fluoride and hexafluoropropylene; the fluorine content in the additive is 30-60% by mass fraction. The additive preparation method comprises the following steps: taking vinylidene fluoride material and hexafluoropropylene material, preparing an oil by an emulsion polymerization method or a free radical solution polymerization method, cleaning the oil with pentane, and drying until the mass is constant to obtain the additive. The additive effectively reduces the number of black particles generated in the polyethylene granulation process, can improve the tensile strength and light transmittance of film products, delays the melt rupture, improves the energy utilization efficiency, and reduces the production cost, energy consumption and material consumption.
Owner:PETROCHINA CO LTD
Rubber composition and tires
Improve the dispersibility of silica and improve low heat generation properties. 【Solution means】The rubber composition according to the embodiment includes a rubber component containing a modified solution-polymerized styrene-butadiene rubber, silica, and a thiuram vulcanization accelerator represented by the following general formula (1). With respect to 100 parts by mass of the rubber component, the content of silica is 80 to 140 parts by mass, and the content of the thiuram vulcanization accelerator is 0.2 to 6 parts by mass. In formula (1), R 1 , R 2 , R 3 and R 4 are each independently a hydrocarbon group having 12 to 20 carbon atoms, which may optionally contain one or more heteroatoms, and R 1 and R 2 , and / or, R 3 and R 4 may each form a heterocyclic group together with the nitrogen atom to which they are attached. 【Chemical formula 1】 JPEG2026103953000006.jpg27147
Owner:TOYO TIRE CORP
Fluorine-free transparent polyimide film based on dynamic covalent network and preparation method thereof
The invention discloses a fluoride-free transparent polyimide film based on a dynamic covalent network and a preparation method of the fluoride-free transparent polyimide film, the fluoride-free transparent polyimide film is formed by copolymerizing a diamine monomer containing a dynamic covalent bond and an alicyclic dianhydride monomer, and a molecular chain of the fluoride-free transparent polyimide film contains 5%-30% of the dynamic covalent bond, the dynamic covalent bond is an acylhydrazone bond or an imine bond; in the preparation process, a bio-based solvent gamma-valerolactone is adopted, and the high-performance film with the light transmittance larger than 90%, the Tg larger than 300 DEG C and the tensile strength larger than 120 MPa is obtained through solution polymerization, film casting and programmed heating imidization processes; according to the invention, the performance contradiction of transparency, heat resistance and recoverability is broken through, and thermal remodeling can be realized.
Owner:DATONG CO POLYMER (XIAN) TECH CO LTD +1
TITANIUM CYCLOPENTADIENYL / ADAMANTYLPHOSPHENIMIN COMPLEXES
This description provides titanium complexes containing 1) a cyclopentadienyl ligand; 2) an adamantyl-phosphinimine ligand; and 3) at least one activatable ligand. The use of the complex, in combination with an activator, as an olefin polymerization catalyst is demonstrated. The catalysts are effective for the copolymerization of ethylene with an alpha olefin (such as 1-butene, 1-hexene, or 1-octene) and enable the production of high molecular weight copolymers (Mw greater than 25,000) with high productivity under solution polymerization conditions.
Owner:NOVA CHEM (INT) SA