78results about How to "Fast polymerization" patented technology

The invention provides an anti-fingerprint coating liquid and an anti-fingerprint hardening film. The anti-fingerprint coating liquid is prepared from components, in percentage by weight, 20%-50% of fluorine-containing acrylic acid prepolymers, 10%-40% of matrix resin, 1%-5% of a photoinitiator and 30%-50% of an organic solvent. The components of the anti-fingerprint coating liquid are limited in the content range, the fluorine-containing acrylic acid prepolymers can be rapidly subjected to a polymerization reaction under the action of the photoinitiator through UV illumination, fluoride elements float on the surface of the matrix resin, the fluorine-containing aid is added to improve the content of the fluoride elements on the surface and improve the levelling property of the coating liquid, after the anti-fingerprint coating liquid is cured to form an anti-fingerprint coating, the smooth degree and the wear resistance of the surface of the anti-fingerprint coating can be improved, and the anti-fingerprint coating has better hydrophobic performance.

The invention relates to a gemini surface activity initiator and a preparation method thereof. An amphiphilic compound containing polyhydroxyl amine and dioctyl groups is firstly synthesized, the compound has the high characteristics of emulsifying oily monomers, hydrophilic tertiary amine can generate a redox reaction with potassium persulfate at room temperature, cation free radicals are firstly formed on nitrogen atoms and then converted into carbon free radicals at the adjacent positions, generation of the free radicals can be repeated for multiple times and flexibly controlled, a serially-initiated multiphase concatenating polymerization mode is achieved, polymerization of styrene and vinyl acetate and polymerization of styrene and acrylamide are initiated on a water-oil interface in sequence, and then a segmented copolymer is obtained. Experiments prove that the feed ratio of monomers is quite consistent with the component ratio of the copolymer, that is to say, the initiation efficiency of the initiator is very high, this mode of polymerization reaction is mild and controllable in condition and low in energy consumption, no other organic solvent or emulsifier is used, the product is pure, and the requirements of green chemistry are totally met.

The invention discloses a liquid aromatic amine epoxy resin curing agent and a preparation method thereof. The liquid aromatic amine epoxy resin curing agent comprises the following components by weight percentage: 70-98 percent of solid aromatic amine and 2-30 percent of low-viscosity aliphatic epoxy resin. The preparation method comprises the following steps of: adding solid aromatic amine with a weight percentage of 70-98 percent in a reaction vessel, raising the temperature to a melting point above, starting an agitator after the material is molten, reducing the temperature to a melting point plus or minus 3 DEG C and dripping the low-viscosity aliphatic epoxy resin with a weight percentage of 2-30 percent for 2-3 batches through an overhead tank; agitating and reacting for 1-2 hours after the end of dripping, reducing the temperature to 50-60 DEG C, and filtering and discharging to obtain the liquid aromatic amine epoxy resin curing agent. The liquid aromatic amine epoxy resin curing agent and the preparation method thereof have the beneficial effects that the liquid aromatic amine epoxy resin curing agent prepared according to the invention can be mutually dissolved with the epoxy resin nearby the room temperature, the quicker polymerization reaction of the aromatic amine with the epoxy resin in the rubber mixing process can be avoided, and the characteristics of small toxicity, excellent curing substance heat resistance and good high-temperature mechanical property of the aromatic amine curing agent are kept.

The invention discloses a polyhydroxy polyamine surface activity initiator and a preparing method thereof. A tri-tert amine compound containing polyhydroxy group and cetyl group is synthesized and is made to have the characteristics of a surfactant; meanwhile, redox reaction can be conducted between tertiary amine and potassium persulfate at normal temperature, cation free radicals are formed on nitrogen atoms firstly and then converted into carbon free radicals at adjacent positions, free radicals can be generated repeatedly under flexible control, multiphase tandem connection polymerization can be achieved, polymerization between styrene and methyl acrylate and polymerization between styrene and acrylamide are triggerned on a water/oil interface in sequence, and a corresponding segmented copolymer is obtained; experiments prove that the rate of charge of a monomer is quite consistent with the component ratio of the copolymer, which implies that the ignition efficiency of the initiator is high. The polymerization reaction condition of the mode is mild and controllable, energy consumption is low, no other organic solvent or emulgator is used, the product is pure, and the requirement of green chemistry is completely met.

The invention relates to a production method of a silicon dioxide aerogel functional material, and belongs to the technical field of aerogel. According to the production method of the silicon dioxideaerogel functional material, through carbonization treatment, the silicon dioxide aerogel functional material is produced, not only can an original nano-porous network structure be maintained, but also the silicon dioxide aerogel functional material has a plurality of excellent property such as a high specific surface area, low mass density and nanoscale continuous pores, and the mechanical performance is good; and montmorillonoid is a two-dimensional molecular-sieve-like porous substance, due to the fact that the montmorillonoid has performance of a large specific surface area, large adsorption capability and the like, the montmorillonoid is applied to a wide variety of aspects of adsorption, hydrogen storage, catalysis, bioseparation, electron devices, chromosorb supports and the like, through carbonization treatment, the swelling capability of a layered structure and exchangeable performance of positive ions of the montmorillonoid are used for inserting the inorganic positive ions into layers of the montmorillonoid, and the layers of the montmorillonoid are distracted to form two-dimensional pore channels with openings, so that the adsorption capability and the mechanical performance of the silicon dioxide aerogel functional material are improved.

The invention relates to a preparation method of an initiator for synthesizing a high polymer, in particular to a preparation method of solvent type cumyl peroxyneodecanoate (CNP). According to the technical scheme of the invention, the preparation method of the solvent type CNP comprises the following steps of: mixing octyl decanoyl chloride with an alkaline solution and cumyl hydroperoxide, stirring and reacting at the temperature of 10-40 DEG C; and washing a reaction product to neutral, and adding an alkane solvent to obtain the solvent type CNP. Due to the adoption of the method for preparing the solvent type CNP provided by the invention, the process flow is simplified, the complex requirements on reaction equipment are eliminated, a reaction can be undergone in a mild and safe condition, the product content and yield can be increased greatly, and the yield can be over 95 percent.

The invention relates to a preparation method of an initiator for polymer synthesis, and in particular relates to a preparation method of emulsion type cumyl peroxyneodecanoate (CNP). The invention adopts a technical scheme that: the preparation method comprises the following steps: mixing and stirring octyl-decanoyl chloride, an alkaline solution and cumene hydroperoxide at a temperature of between 10 and 40 DEG C to react; and adding proper an antifreezing agent, an emulsifier, a dispersing agent and deionized water, and mixing to prepare a homogenous solution, namely emulsion type cumyl peroxyneodecanoate (CNP). The product prepared by using the method provided by the invention has greatly improved content and yield, and is convenient for storage and transportation. According to the method, the process is simplified, complicated requirement to reaction equipment is overcome, the reaction is carried out in a milder and safer condition, and the product yield is over 95 percent.

The invention discloses a cationic polymerization method for vinyl monomer. In the method, a reaction medium, the vinyl monomer, an initiator, lewis acid and an additive are used, wherein the reaction medium is a mixed reaction medium comprising an organic solvent and water or completely water; the organic solvent is at least one selected from alkane, naphthenic hydrocarbon and halogenated hydrocarbon; the lewis acid is one or a mixture of substances which accord with a general formula of MXn or YRn-mXm; the additive is an oxygen atom and nitrogen atom-containing organic compound; the molar ratio of the lewis acid to the additive to the monomer is 1.0*10<-3> to 3.2*10<-2>:1.0*10<-3> to 3.0*10<-1>:1; and the materials are reacted at the temperature of between -100 and 50 DE C for 0.5 minute to 2 hours to form a polymerization product, namely polymer with molecular weight of 10<5>. The method can simplifies the process flow, saves the production cost, and has great significance and considerable market application value.

The invention relates to a preparation method of an initiator for synthesizing a high polymer, in particular to a preparation method of emulsion type tert-butyl peroxyneo-caprate (BNP). According to the technical scheme of the invention, the preparation method of the emulsion type BNP comprises the following steps of: mixing octyl decanoyl chloride with an alkaline solution and tert-butyl hydrogen peroxide, stirring and reacting at the temperature of 10-40 DEG C; separating a mother liquor; and mixing a reaction product with a homogenized liquid prepared from an anti-freezing agent, an emulsifier, a dispersant and deionized water to obtain the emulsion type BNP. Due to the adoption of the method provided by the invention, the product content and yield are increased greatly, and convenience is brought to storage and transportation. Due to the adoption of the method, the process flow is simplified, the complex requirements on reaction equipment are eliminated, a reaction can be undergone under the mild and safe condition, and the product yield can be over 95 percent.

The invention relates to a green preparation method of a vinyl chloride/butyl acrylate copolymer used as a thermoplastic elastomer. The preparation method is based on a synthesis technology of a copolymer formed by interfacial free-radical polymerization of water/oil two-phases. Based on a copolymer synthesis technology through water/oil two-phase interfacial free-radical polymerization, a polyhydroxy polyamine surface active initiator and potassium persulphate are subjected to an oxidation reduction reaction at normal temperature, free radicals are repeatedly generated on the interface and independent polymerization of vinyl chloride and butyl acrylate is initiated. Through molecules of the initiator, two chain segments are connected in series so as to form a poly-segment copolymer. It is proved through experiments that pH of an aqueous medium is within the range of 4-4.5, feed ratio of a monomer is very consistent with composition ratio of the copolymer and content of the butyl acrylate chain segments in the copolymer is adjustable within the range of 10-42wt%. According to the mode of polymerization reaction, conditions are mild and controllable, energy consumption is low, other organic solvents or emulsifiers are not used, and the product is pure. The method completely meets the requirement of green chemistry.

The invention relates to the technical field of silicone rubber production and relates a continuous production system and method of polysiloxane. The continuous production system for polysiloxane comprises a premixer, a polymerization type double-screw extruder connected with a discharge hole of the premixer, a first vacuumizing system connected with an exhaust port of the polymerization type double-screw extruder, a static mixer connected with a discharge hole of the polymerization type double-screw extruder, a falling strip type devolatilization device connected with a discharge hole of thestatic mixer, a second vacuumizing system connected with a vacuum hole of the strip falling type devolatilization device, a devolatilization type double-screw extruder connected with a discharge holeof the strip falling type devolatilization device, and a third vacuumizing system connected with a vacuum port of the devolatilization type double-screw extruder. Finally, the produced polysiloxane isrelatively high in viscosity and relatively low in volatile component.

The invention relates to a method for preparing vinylidene fluoride/N, N-dimethylacrylamide copolymers in a green manner. The vinylidene fluoride/N, N-dimethylacrylamide copolymers are used as separation membrane materials. The method has the advantages that the method is a copolymer synthesis technology based on water/oil two-phase interfacial free radical polymerization, oxidation-reduction reaction is carried out by special Gemini surface active initiators and potassium persulfate at the normal temperature, free radicals are repeatedly generated on interfaces, independent polymerization reaction between vinylidene fluoride and N, N-dimethylacrylamide is initiated, two types of chain segments are connected with each other by initiator molecules in series to form the segmented copolymers, the feed ratios of monomers are extremely consistent with component ratios of the copolymers when pH (potential of hydrogen) values of water-phase media are within the ranges of 4.0-4.5 as proved by experiments, the content of N, N-dimethylacrylamide chain segments in the copolymers is adjustable in the ranges of 5-25 wt.%, polymerization reaction conditions in the modes are mild and controllable, the method is low in energy consumption, other organic solvents or emulsifiers can be omitted, products are pure, and requirements on green chemistry can be completely met.

The invention discloses a hydroxymethyl acrylamide-acrylate copolymer toughened and modified polylactic acid material and a preparation method thereof. The hydroxymethyl acrylamide-acrylate copolymer serving as a toughening agent accounts for 5 to 15 percent of the weight of the material; and the material is a transparent material of which the tensile strength is 36 to 50Mpa, the breaking elongation is 40 to 350 percent, and the Izod impact strength is 5 to 17KJ/m<2>. The invention also discloses a method for preparing the polylactic acid material. Because the hydroxymethyl acrylamide-acrylate copolymer serving as the toughening agent can form a fine granular disperse phase in polylactic acid to play a role in toughening similar to rubber particles, the material has the advantages of small additive amount, high toughening efficiency, little influence on the strength, high machining flowability, transparency, rigidity and heat resistance, quick polymerization reaction, short production cycle, simple process control, low cost and easy industrial popularization and application.

The invention relates to a preparation method of an initiator for synthesizing a high polymer, in particular to a preparation method of solvent type tert-butyl peroxyneo-caprate (BNP). According to the technical scheme of the invention, the preparation method of the solvent type BNP comprises the following steps of: mixing octyl decanoyl chloride with an alkaline solution and tert-butyl hydrogen peroxide, stirring and reacting at the temperature of 10-40 DEG C; separating a mother liquor; and washing a reaction product to the neutral state and adding an alkane solvent to obtain the solvent type BNP. Due to the adoption of the method for preparing the solvent type BNP provided by the invention, the process flow is simplified, the complex requirements on reaction equipment are eliminated, a reaction is undergone in the mild and safe environment, the product content and yield are increased greatly, and the yield can be over 95 percent.

The invention discloses a butene-1 polymerization reaction kettle and a butene-1 polymerization reaction heating method, relates to the technical field of chemical engineering, and aims at decreasing the temperature gradient of reaction materials in the radial direction of the reaction kettle and increasing the polymerization speed and the polymerization degree of polybutylene-1. The butene-1 polymerization reaction kettle comprises a reaction kettle body and a condenser; the reaction kettle body is provided with a stirring device, the heat absorption side of the condenser is communicated with a refrigerant circulating pipeline, a steam outlet of the reaction kettle body and a heat release side inlet of the condenser are connected through an air extraction pipeline, and a heat release side outlet of the condenser is connected with a reflux inlet of the reaction kettle body through a reflux pipeline; the air extraction pipeline extracts saturated steam of a butene-1 polymerization reaction system in the reaction kettle body, wherein butene monomer steam is contained in the saturated steam. The butene-1 polymerization reaction heating method is applied to the butene-1 polymerization reaction kettle. The butene-1 polymerization reaction kettle is applied to polybutylene-1 production.

The invention relates to the technical field of building materials, in particular to a quick-setting high-alkali-activated fly ash cementing material capable of being maintained at normal temperature and a preparation method of the quick-setting high-alkali-activated fly ash cementing material. The raw materials comprise the following components in parts by weight: 30-50 parts of undisturbed fly ash, 50-70 parts of high-activity superfine fly ash and 12-18 parts of sodium hydroxide. Based on the premise that a raw material system and a preparation process are simplified and feasible, under an existing raw material system, through pretreatment of fly ash and a sodium hydroxide exciting agent, AAFA which is rapid in setting and high in strength under normal-temperature curing is prepared, the AAFA is rapidly set under the normal-temperature condition, high early-stage and later-stage strength is obtained, an existing high-temperature curing step is omitted, and the production cost is reduced. And the application of the device in on-site constructional engineering is expanded.

The invention provides a green preparation method of a vinyl chloride/ dimethyl diallyl ammonium chloride copolymer which is used as a separating membrane material. The green preparation method is a copolymer synthesizing technology based on a water/oil two-phase interfacial free-radical polymerization. The green preparation method is characterized in that a cationic surface active initiator is specifically used and subjected to oxidation-reduction reaction with potassium persulfate under normal temperature; the oxidation-reduction reaction is repeated at a plurality of times so as to generate free radicals on an interface, and the independent polymerization reaction of vinyl chloride and dimethyl diallyl ammonium chloride is initiated; the two chain segments are connected in series through initiator molecules, thus obtaining a segmented copolymer. The experiment shows that when the pH of a water phase medium is 4.5 to 5, the rate of charge of monomer is consistent with the component ratio of the copolymer; the content of dimethyl diallyl ammonium chloride chain segment in the copolymer can be adjusted between 5-16wt.%; the polymerizing reaction under such mode is mild and controllable in condition, low in energy consumption, free of other organic solvents and emulsifiers, and pure in products, and completely meets the requirement of green chemistry.

The invention provides a processing aid ACR for PVC sheet high-transparency products, and relates to the technical field of production and manufacturing of processing aids ACR. The PVC sheet high-transparency product processing aid ACR is prepared from the following raw materials in parts by weight: 70-90 parts of methacrylate, 10-30 parts of acrylate and 2-5 parts of emulsifier, wherein the emulsifier is allyl polyether; the methacrylate, the acrylate and the emulsifier are put into a reaction tank for polymerization reaction, and processing aid ACR is obtained. According to the method, all materials participate in the polymerization reaction, no auxiliary substance is left in the product, the purity is high, subsequent refining treatment is not needed, the production process is simplified, and the production cost is reduced.

The invention discloses a preparation method and a preparation device for polyacrylamide nanoparticles. The preparation method includes continuously introducing a liquid material, comprising acrylamide, crosslinking agents and initiators, and compressed air into a tubular reactor to decompose the initiators at a certain temperature to obtain free radicals, initiating polymerization of the acrylamide, guiding out a polyacrylamide-containing material from the tubular reactor, and collecting finished products of the polyacrylamide nanoparticles. The preparation method and the preparation device have the advantages that the process is simple, the high-safety tubular reactor is applied to continuous production, the prepared polyacrylamide nanoparticles have stable quality and uniform grain diameter, overflowing and colliding in a conventional kettle-type production process are avoided, and product quality and production efficiency are improved.

The invention belongs to the field of resin synthesis, and particularly relates to a vinyl chloride polymerization terminator with good low-temperature fluidity, and a preparation method and application thereof. The terminator comprises the following ingredients of, by weight, 20 parts to 30 parts of diethylhydroxylamine, 30 parts to 40 parts of ethylene glycol diglycidyl ether, 20 parts to 30 parts of diphenyl isodecyl phosphite, 40 parts to 50 parts of deionized water, and 0.5 part to 2 parts of a dispersing agent, wherein the dispersing agent is a polyvinyl alcohol aqueous solution with thedegree of polymerization ranging from 300 to 400, the alcoholysis degree ranging from 50% to 60%, and the concentration of 5%. The vinyl chloride polymerization terminator with good low-temperature fluidity is good in low-temperature fluidity, thereby being suitable for regions or seasons with the low temperature, and the composite terminator can stay uniform and stable without emulsifiers. The invention further provides the preparation method and the application of the terminator. The terminator not only has the good vinyl chloride polymerization termination effect while improving the thermal stability of resin, but also has the good low-temperature fluidity so that can be used at cold regions or cold seasons.