229results about How to "Fast polymerization rate" patented technology

The invention relates to a synthesis method of drilling fluid filtrate reducer. The method comprises: a, nonionic compound emulsifying agent is dissolved in oil and oil phase is made up; a first monomer chosen from fumaric acid, maleic acid, itaconic acid or crylic acid, a second monomer chosen from N, N- dimethylacrylamide, N, N-diethylacrylamide or acrylamide and a third monomer chosen from 4-vinylbenzenesulfonic acid sodium salt, sodium allylsulfonate, 3-allyloxy-2-dydroxy-1-sodium allylsulfonate, 2- methacryloxypropyl-2-methyl propanesulfonic acid, 2-acrylamido-2-methyl propanesulfonic acid or SMAS are dissolved in water with the molar ratio of 1:1 to 5:1 to 5, the pH value of the solution is adjusted to be between 8 and 11, evocating agent is added and water phase solution is made up; and b, the water solution is added to the oil phase solution and the temperature rises to 40 to 70 DEG C for polymerization. The method of the invention has the advantages of fast polymerization speed, high outcome molecular weight and high outcome stability, good filtrate reducing performance, high temperature resistance and high salt resistant performance.

The invention relates to a preparation method for a particle diameter controllable millimeter-scale polyurea monodisperse microsphere. The preparation method comprises the following steps: isocyanate compound is adopted as a monomer and is squeezed through syringe needles or capillary tubes to form liquid drops and the liquid drops are added into water or a polyamine aqueous solution for sedimentation and polymerization; during the settlement process of the liquid drops, the monomers on the surfaces of the liquid drops react with the water or the polyamine aqueous solution rapidly to form a gelatin layer or callus and the stability of particles is maintained. According to the method, as water is adopted as the dispersion medium, no pollution is generated; the polymerization reaction can be conducted under lower temperature, the equipment is simple and the manufacturing cost is low; the obtained microsphere is free from residual monomer and the post-processing is simple; no surface modified agent or pore-foaming agent is needed, porous polyurea microsphere with rich amino on the surface is prepared in one step; the method can be used in the fields of enzyme immobilization, chemocatalysis, dye, adsorption and separation of heavy metal ions and the like.

The invention relates to a method for quickly preparing a phase change energy storage microcapsule by ultraviolet light irradiation and polymerization, which comprises the following steps: adding 100 parts of phase change energy storage material, 5-10 parts of surface active agent, 40-80 parts of monomer material and an ultraviolet light initiating agent being 2-5 percent of the monomer material into 500-1,000 parts of deionized water; stirring the materials at a certain rotating speed for 20-40 minutes and then homogenizing and dispersing the materials for 2-5min at the rotating speed of 6,000-12,000 by a homogenizer so as to prepare the materials into an emulsion; putting the emulsion under an ultraviolet light source of 500-1,000W, irradiating the emulsion for 20-40min to initiate the monomer material to polymerize and stirring the emulsion at lower rotating speed; and after finishing initiating, filtering the emulsion to obtain solid powder and washing and drying the solid powder. Because the wavelength of the ultraviolet light is concentrated, the initiation mode of the ultraviolet light to a reactant system is easy to control, and a large quantity of the ultraviolet light initiating agent can be decomposed to generate free radicals, therefore, the reaction speed of photopolymerization is many times higher than the reaction speed of a conventional thermal initiation polymerization mode, and the improvement of the reaction speed renders possible the continuous mass production.

The invention discloses a method for preparing a quick-response temperature-sensitive hydrogel by adopting room-temperature eutectic solvent liquid frontal polymerization, and belongs to the technicalfield of preparation of functional polymer materials. The method comprises the following steps: mixing a polymerizable temperature-sensitive monomer, a hydrogen bond donor compound and a hydrogen bond acceptor compound, stirring at 80-100 DEG C until a transparent and clear liquid is formed, and cooling to room temperature to obtain a room-temperature eutectic solvent liquid; adding a cross-linking agent and an initiator into the room-temperature eutectic solvent liquid to form a mixture solution; transferring the formed mixture solution into a tubular reactor, initiating a reaction at the upper end or the lower end of the reactor by adopting a heat source or ultraviolet light, and removing the heat source or the ultraviolet light after the thermal initiation reaction is started until allthe raw materials in the whole reactor are converted into a polymer gel; and soaking and washing the obtained polymer gel with distilled water, and freeze-drying to obtain the target hydrogel. No extra liquid solvent is needed, the polymerization speed is high, the reaction time is short, and the energy consumption is low.

The invention relates to a special anticorrosion conductive powder coating for vertical shaft fluidized bed dip-coating. The special anticorrosion conductive powder coating is prepared from the following raw materials in parts by weight: 500-900 parts of film-forming resin and curing agent, 0-200 parts of glass flakes, 0-350 parts of filler, 15-50 parts of auxiliaries, 5-100 parts of conductive material and 1-5 parts of nanometer aluminum oxide or nano fumed silica. The powder coating has the characteristics of a high glass transition temperature, low specific gravity which is generally less than or equal to 1.1g/cm<3>, and easiness for fluidization; even though hundreds of tons of powder is added to a 20m deep well, the powder can be fluidized easily and uniformly; in case of too high specific gravity and difficult fluidization, the vertical shaft dip-coating method can not be utilized; the powder aims at a hot-dip coating construction process, and the film formed by the coating has surface conduction characteristics and high temperature water boiling resistance, and therefore, the coating is suitable for anti-corrosion coating of long linear workpieces such as mine mining anti-explosion gas pipelines, natural gas pipelines and liquefied gas pipelines; the coating is adaptive to the vertical shaft fluidized beds as deep as 20m, and still has good fluidity, which cannot be realized by common powders easily.

The invention discloses a new method for preparing nylon-46 in a supercritical carbon dioxide medium, which comprises the following steps of: adding a 1,4-butanediamine methanol solution into a 1,6-adipic acid methanol solution under the condition of stirring to obtain precipitates; filtering and drying to obtain nylon-46 salt; putting the nylon-46 salt into a reaction kettle, filling carbon dioxide for replacing the air in the kettle, carrying out vacuum-pumping operation, and pumping carbon dioxide; increasing temperature and pressure to enable the carbon dioxide in the kettle to be in a critical state, and carrying out polycondensation reaction of the one-step method in the existence of supercritical carbon dioxide; after the polycondensation reaction, cooling to room temperature, relieving the pressure, and opening the kettle to obtain nylon-46 products of the one-step method; crushing the polycondensation products of the one-step method, and putting the powder into the reaction kettle again to carry out the second-step polycondensation reaction in the existence of supercritical carbon dioxide; and after the second-step polycondensation reaction, cooling to room temperature, relieving the pressure, and opening the kettle to obtain nylon-46 products of a two-step method.

The invention relates to a polyurethane dithiol prepolymer, a photosensitive resin composition as well as a preparation method and application of the prepolymer. The prepolymer is represented by a formula (I) (shown in the description), where R represents a formula (shown in the description), n1 is greater than or equal to 2 and less than or equal to 6, n2 is greater than or equal to 1 and less than or equal to 100, n3 is greater than or equal to 1 and less than or equal to 100, n4 is greater than or equal to 1 and less than or equal to 100, n5 is greater than or equal to 1 and less than or equal to 100, n6 is greater than or equal to 1 and less than or equal to 100, x is greater than or equal to 1 and less than or equal to 3, y is greater than or equal to 1 and less than or equal to 3, R2represents a formula (shown in the description). According to the polyurethane dithiol prepolymer through the increase of the length of a mercaptan alkyl chain and the substitution of a specific group, the mercaptan volatility is greatly weakened, the prepolymer has no pungent smell, and the photosensitive resin prepared from the prepolymer is odorless and relatively low in volume shrinkage speedand relatively high polymerization speed.

The invention relates to a polymerizable compound with general formula I, also provides a polymerizable liquid crystal composition containing the polymerizable compound and a liquid crystal display element containing the polymerizable compound, and especially provides a liquid crystal display element used for PS or PSA (polymer stabilized or polymer stably-aligned) liquid crystal displays. The polymerizable liquid crystal compound has the advantages of good solubility, good orientation effect, fast polymerization rate, complete polymerization and low residue, so the bad display problem can be greatly improved.

The invention discloses a polymeric reactor and a polyester production method. The polymeric reactor comprises a closed horizontal cylinder. A front end rotating shaft is arranged at the portion, close to a material inlet, inside the cylinder. One end of the front end rotating shaft stretches out from the cylinder and is connected with a first power device. A rear end rotating shaft is arranged at the portion, close to a material outlet, of the cylinder, and one end of the rear end rotating shaft stretches out from the cylinder and is connected with a second power device. A supporting structure for supporting the front end rotating shaft and the rear end rotating shaft is arranged inside the cylinder. A cage frame type stirrer is arranged on the front end rotating shaft. A section of screw-type disc is arranged at the portion, close to the front end rotating shaft, of the rear end rotating shaft. A plurality of sets of coaxial circular rings are arranged at the other parts of the rear end rotating shaft. A plurality of scrapers parallel to the faces of the circular rings are arranged among the circular rings. According to the method, the polymeric reactor is used for performing polyester production to obtain a high-viscosity polyester melt. The cage frame type stirrer is arranged at the front end, the multiple circular rings are arranged at the rear end, and the devolatilization efficiency of equipment can be effectively improved.

The invention discloses a phosphate surfactant, of which the chemical formula is: H-(CF2)m-CH2-O-(CH2CH2O)n-PO(OM)2, wherein m is equal to 2, 4, 6 or 8, n is equal to 0 or 1, and M is NH4+ or Na+. The invention also discloses a method for preparing trifluorochlor oethylene polymer emulsion or solid with the phosphate surfactant as an emulsifier. The surfactant can be used for emulsion polymerization of fluoride-containing monomer. Used as the emulsifier, the surfactant can achieve a high polymerization rate, good dispersion stability, high yield, excellent copolymerization performance and/or multiple particle sizes (including small particle size). Besides, the method can realize polymerization by only using conventional equipment, is easy and convenient to operate and has a low cost, and does not cause environmental pollution during and after reaction.

The invention relates to a synthesis method of an organosilicon drilling fluid water loss reducing agent, which comprises the following steps: adding 2-acrylamido-2-methylpropanesulfonic acid and acrylamide into an organic solvent, adding an organosilicon monomer and a photoinitiator, and carrying out ultrasonic treatment until all the solid matters are dissolved; irradiating under ultraviolet light for some time to obtain a gelatinous product; soaking the gelatinous matter in anhydrous alcohol for several hours; and taking out, carrying out vacuum drying, and grinding to obtain the white powdery product. The fluid loss agent prepared by the method provided by the invention has the advantages of favorable water loss reducing property, high temperature resistance, favorable salt resistance, high molecular weight and high stability; besides, the method provided by the invention has the advantage of high polymerization rate, and is simple; and the water loss reducing agent has favorable fluid loss reducing effect in both fresh-water drilling fluids and salt-water drilling fluids.

The invention relates to a method of preparing hyperbranched polythioether based on selective thiol-ene and thiol-epoxy click chemistry. According to the method, difunctional glycidyl acrylate monomers and trifunctional mercaptan are used as raw materials, and hyperbranched polythioether with a controlled skeleton and end group is synthesized by a one-pot method. The hyperbranched polythioether click chemical preparation method has the advantages that the raw material is easy to obtain, the steps are simple, the polymerization rate is rapid, the controllability is good, the skeleton of the prepared hyperbranched polythioether can be controlled, and the end group can be effectively controlled to be thiol or epoxy by using the monomeric molar ratio; functional modification can be further conducted, and the hyperbranched polythioether with particular characteristics is prepared.

The invention discloses a preparation method of a polyether ester multi-block alternating copolymer. The preparation method comprises the following steps: 1) adding a cyclic oligoester and polyether glycol to a reaction device, stirring mechanically and vacuumizing; step 2) heating to the range of 120-180 DEG C, adding a catalyst after the reactants are mixed evenly, and vacuumizing; 3) increasing the temperature to the range of 220-280 DEG C for reacting, performing ring opening polymerization on the cyclic oligoester in the presence of the polyether glycol, thereby obtaining a polyether ester three-block copolymer, and then performing condensation polymerization on the three-block copolymer to obtain the polyether ester multi-block alternating copolymer. The polyether ester multi-block alternating copolymer identified in structure is obtained by performing ring-opening condensation polymerization on the cyclic oligoester monomers by use of the polyether glycol in vacuum; the preparation method has the advantages of simple reaction, few by-products and no aftertreatment; besides, the product can be directly used without being purified.

The invention relates to a method for preparing micro-sized monodisperse polymer microspheres in static condition. The method comprises the steps that diisocyanate monomers and a water-acetone mixed solvent are added into a reaction bottle, wherein the mass ratio of water to acetone ranges from 20/80 to 60/40, and the diisocyanate compound accounts for 0.5-13.0% of the total mass of the polymerization system; after the reaction bottle is sealed and the mixed solvent is shaken up, the reaction bottle is placed in thermostatic waterbath of 20-80 DEG C for polymerization; after polymerization, the products are centrifugalized and dried to obtain the micro-sized monodisperse polyurea microspheres. The method for preparing micro-sized monodisperse polymer microspheres in static condition has the advantages that one monomer is used for precipitation polymerization completely in static condition without any stirring or oscillation, so that the reaction time is short, the monomer can be transformed completely, the yield of microspheres is high, and the operation is simple; the method is conducive to scale production of monodisperse microspheres; and the produced microspheres have clean surfaces and a large amount of amido, and can be used in various fields of protein adsorption and separation, enzyme immobilization, chromatographic analysis and the like..

The invention relates to a polyacrylonitrile copolymer spinning solution and a preparation method thereof. In the invention, copolymerization reaction is performed on acrylonitrile in a tubular reactor containing a static mixer component; the tubular reactor, which contains the static mixer component and has the characteristics of mass transfer, efficient heat transfer, continuous and stable reaction and no mechanical stirring, is adopted to prepare the polyacrylonitrile copolymer spinning solution with high molecular weight and narrow molecular weight distribution. The polyacrylonitrile copolymer spinning solution is obtained after copolymerization reaction is performed on reaction liquid composed of monomers, a radical initiator and a solvent, wherein the percent concentration by weight of the monomers in the reaction liquid is 15% to 20%; the weight of the radical initiator is 0.4% to 1% of that of the monomers; the solvent is in balancing amount; the monomers are an acrylonitrile monomer and a comonomer. The dynamic viscosity of the polyacrylonitrile copolymer spinning solution provided by the invention is 200 to 800 Pa.S, and the molecular weight distribution is 1.5 to 2.6.

The invention discloses a reversible addition-fragmentation chain transfer free radical polymerization method, wherein characterized in that, microwave radiation heating can be used for polymerization, and it is possible not to use initiating agent . The invention can greatly increase polymerization speed, andconveniently control molecular weight of polymerization product.

The invention provides a polyethylene catalyst carrier material with an ultrahigh molecular weight and a preparation method thereof. The preparation method comprises the following steps: mixing a graphene oxide aqueous solution with a silica sol to obtain a mixed dispersion solution; spraying the mixed dispersion solution into liquid nitrogen, performing atomization, then curing instantly, volatizing to remove the liquid nitrogen, and performing vacuum drying to remove water so as to obtain a sample; heating the sample to perform activation reaction, thereby obtaining a graphene oxide/silicon dioxide spherical catalyst carrier material; mixing the graphene oxide/silicon dioxide spherical catalyst carrier material with butyl magnesium chloride in a tetrahydrofuran solution, and stirring for reaction to obtain a reaction product; and cleaning the reaction product, and heating at 600 DEG C for 2 hours to obtain the polyethylene catalyst carrier material with the ultrahigh molecular weight. The catalyst carrier provided by the invention can effectively reduce entanglement of polymer molecular chains, so that a graphene/ultrahigh-molecular-weight polyethylene composite material can be prepared.

The invention relates to a high-yield preparation method of functional monodisperse polyurea microspheres. The method adopts a precipitation polymerization process and comprises the following step: with water and acetonitrile as solvents and isophorone diisocyanate as monomers, reacting isocyanate with the water to prepare the monodisperse polyurea microspheres with rich amine groups on the surfaces. According to the method, single raw material is used, the reaction time is short, the monomers are completely converted, and the monomer content and the microsphere yield during preparation of the monodisperse microspheres are remarkably increased; the microsphere preparation process can be carried out in a complete standing condition, the functional polyurea microspheres can be obtained in one step without any surface modification, the process is simple, and the obtained microspheres can be used in the fields of enzyme immobilization, chemical catalysis, chromatographic analysis and the like.

The invention relates to the technical field of fluorine chemical industry and particularly relates to an aqueous fluorine-containing dispersion solution as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) taking fluorine-containing olefin monomers and perfluorinated diene as raw materials and carrying out emulsion polymerization to obtain a fluorine-containing seed polymer emulsion; and (2) taking the fluorine-containing seed polymer emulsion and fluorine-free olefin monomers as the raw materials and carrying out emulsion polymerization to obtain the aqueous fluorine-containing dispersion solution. According to the preparation method, unsaturated side chains can be formed on fluorine-containing seed polymer particles in the step (1), so that the combination of the fluorine-containing seed polymers and the fluorine-free olefin monomers is effectively improved; the modification action of fluorine-free olefin on fluorine-containing polymers can be better achieved; the synergistic action between two types of monomers is achieved, so that the negative influence of fluorine-free monomers on weather resistance and the negative influence of the fluorine-containing monomers on adhesion performance are reduced. The aqueous fluorine-containing dispersion solution has high pollution resistance, stain removal performance, adhesion, weather resistance and chemical resistance; the coating of the aqueous fluorine-containing dispersion solution has high glossiness and hardness.