1881 results about "Double bond" patented technology

The invention belongs to the technical field of flame retardants, and particularly relates to a high-thermal-stability polyphosphate flame retardant and a preparation method thereof. The DOPO is modified through the polyethylene glycol acrylate, methyl methacrylate and dicumyl peroxide composite solution, double bonds of the polyethylene glycol acrylate and P-H bonds of the DOPO can be subjected to nucleophilic addition to form stable C-P bonds, and thermal migration of the DOPO is hindered; dOPO has polymerization double bonds of methyl methacrylate and long carbon chains of polyethylene glycol acrylate, so that the compatibility of the polyphosphate flame retardant and a polymer substrate is improved, and phase separation is avoided; maleic anhydride grafted silicone oil is connected to the surface of an amino modified gamma-cyclodextrin-modified DOPO inclusion compound, so that the polyphosphate flame retardant has high thermal stability and high compatibility after long-chain alkyl modification; amino groups in the modified gamma-cyclodextrin react with maleic anhydride grafted silicone oil to generate an amido bond cross-linked network, so that the thermal migration of DOPO is reduced together, and the high thermal stability of the polyphosphate flame retardant is improved.

The invention belongs to the technical field of thin film capacitors, and particularly relates to a chemical grafting modified polypropylene capacitor film material and a preparation method and application thereof. According to the preparation method of the chemical grafting modified polypropylene capacitor film material, provided by the invention, diethylenetriamine ethyl acrylate with a plurality of specific groups such as amino groups and carboxyl groups and unsaturated double bonds is synthesized through esterification reaction, and the diethylenetriamine ethyl acrylate is introduced into a polypropylene material through chemical grafting to obtain chemical grafting modified polypropylene; the prepared polypropylene capacitor film material has the excellent properties of good compatibility, difficulty in film breakage, capability of adsorbing and removing residual moisture, difficulty in oxidation corrosion, excellent breakdown resistance and the like, and the preparation method is a preparation method of the high-performance polypropylene capacitor film material; therefore, the technical problem that a polypropylene capacitor film material prepared in the prior art is low in performance is solved.

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.

According to the method for recycling the waste lithium ion battery positive electrode material aluminum foil, double-bond addition is conducted on ureido of allylurea and maleimide, meanwhile, thiazolecarboxylic acid amino cyclization is conducted, ternary heterocyclic molecules containing ureido, thiazole rings and carboxyl are generated, S atoms, N atoms and O atoms form tridentate coordination sites, and the leaching rate of aluminum is increased.

The present application provides a preparation method for a filtrate reducer and the use thereof. The preparation method comprises: dropwise adding a silane coupling agent containing double bonds into a graphite dispersion under an acidic condition for grafting reaction to obtain silane-coupling-agent-modified graphite, then adding a cross-linking agent into the silane-coupling-agent-modified graphite, adjusting the pH to neutrality to obtain a first intermediate solution, mixing acrylamide, a sulfonic monomer, a cationic monomer and a monomer containing a cyclic group, then adjusting the pH to neutrality to form a second intermediate solution, finally adding an initiator into the first intermediate solution, then dropwise adding the second intermediate solution for polymerization reaction to obtain the filtrate reducer. The filtrate reducer prepared by such a method has a better high-temperature-resistant filtrate loss reduction property, and better pressure bearing capacity and plugging capacity.

The invention belongs to the field of flexible piezoelectric polymer materials, and discloses a polyvinylidene fluoride based ferroelectric polymer and a preparation method thereof. The preparation method comprises the following steps: (1) adding an inorganic alkaline reagent into a polyvinylidene fluoride-trifluoroethylene ferroelectric polymer solution, carrying out dehydrofluorination and nucleophilic addition-elimination reaction to generate a polymer with an enol structure, and then washing, precipitating and purifying a reaction product; and (2) re-dissolving by using an organic solvent, then forming a film by using a tape casting method, and carrying out ketone-enol tautomerization reaction in the film forming process of the tape casting method to finally prepare the polyvinylidene fluoride based ferroelectric polymer film. According to the effective modification and preparation method disclosed by the invention, an enol structure is promoted to be converted into a more stable ketone structure through a ketone-enol tautomerization reaction by utilizing a high-temperature environment in a film forming process, so that C = O double bonds are introduced into a polymer chain, and the piezoelectric property of the polymer is remarkably enhanced.

The invention relates to the technical field of in-vitro diagnostic kits, in particular to carboxyl polystyrene microspheres, a preparation method and application of the carboxyl polystyrene microspheres in a kit for quantitatively detecting MxA. The preparation method of the carboxyl polystyrene microspheres comprises the steps that firstly, polystyrene microspheres with the surface rich in aldehyde groups are prepared through a soap-free emulsion polymerization method; then carrying out a Schiff alkali reaction with 2-aminoethyl methacrylate hydrochloride to carry out double bond modification on the surface of the microsphere, and meanwhile, improving the hydrophilicity of the microsphere by an ester group and an imino group; and finally, carrying out sulfydryl-double bond addition reaction on the polystyrene microspheres and mercaptosuccinic acid to generate the polystyrene microspheres rich in carboxyl on the surfaces. The carboxyl polystyrene microspheres prepared by the invention can improve the binding efficiency of latex and an MxA antibody, so that the detection sensitivity is improved, the purpose of high-sensitivity quantitative detection of MxA protein can be achieved, and the detection time is greatly shortened.

The invention relates to a degradable composition and flame-retardant degradable plastic. The degradable composition comprises PLA particles, modified lignin and a bio-based flame retardant, wherein the modified lignin is obtained by grafting polycaprolactone on lignin and then forming a core-shell structure on the surface of silane coupling modified calcium carbonate; the preparation method of the bio-based flame retardant comprises the following steps: heating and dissolving chitosan in an acetic acid solution, introducing nitrogen, adding an initiator, then adding a DOPO derivative with double bonds at the tail end, MDO and AA, and carrying out a polymerization reaction to prepare the flame retardant. According to the scheme, the lignin-PCL / calcium carbonate core-shell toughening agent and the P-N synergistic chitosan flame retardant are prepared and are jointly added into the PLA, the compatibility with the PLA is good, the problem of high brittleness of the PLA can be effectively solved, the elongation at break is improved, meanwhile, the material is endowed with flame retardance, and the biodegradability of the PLA material can be well kept.

The invention provides a composite photo-thermal hydrogel for seawater desalination and a preparation method and application thereof, the hydrogel has a structural unit of a structure as shown in a formula I. COF with photo-thermal performance is compounded with the hydrogel, and the hydrogel has a three-dimensional long-range ordered pore structure to promote transmission of water molecules; and the COF dispersed in the material contains porphyrin and a C = N double-bond connection structure, so that the material has excellent photothermal conversion efficiency. Therefore, under the irradiation of sunlight, the composite photo-thermal hydrogel disclosed by the invention can realize photo-thermal conversion to realize seawater evaporation, the seawater evaporation rate reaches 3.6 kgm <-1 > h <-1 >, and the performance is improved by about 3 times compared with that of a traditional carbon-based material. According to the preparation method of the composite photo-thermal hydrogel, large and complex equipment is not involved in the preparation method, the preparation technological process is simple, and industrial large-scale production is facilitated; and the reaction temperature in the preparation process is low, the energy consumption is also reduced, and the cost advantage is remarkable.

The present invention pertains to the technical field of materials. Disclosed are a polymer composite hydrogel and a preparation method therefor, and a tooth desensitization material. The polymer composite hydrogel consists of a GelMA hydrogel and BP nanosheets composited inside the GelMA hydrogel, wherein the GelMA hydrogel is prepared by crosslinking gelatin methacryloyl via double bonds under the action of a photoinitiator. Under the photothermal effect, the polymer composite hydrogel of the present invention can enhance the resistance of dentin to external stimuli and promote the formation of stable and effective occlusion of dentinal tubules. Moreover, the occlusion effect on the dentinal tubules exhibits acid resistance, corrosion resistance, and stability, preventing the possibility of short-term reopening of the occluded dentinal tubules. This is of great significance for the treatment of occluded dentin hypersensitivity (DH).

The invention discloses a preparation method of Fe3O4 magnetic nanoparticles rich in carboxyl groups on the surface, which comprises the following steps: modifying Fe3O4 nanoparticles by using polyethylene glycol and silicon dioxide to enhance the dispersity and biocompatibility of the magnetic nanoparticles, modifying the surfaces of PEG-Fe3O4 coated SiO2 nanoparticles by using a silane coupling agent containing silane groups and unsaturated double bonds to obtain the magnetic nanoparticles rich in carboxyl groups on the surface, and modifying the magnetic nanoparticles rich in carboxyl groups on the surface by using a silane coupling agent containing silane groups and unsaturated double bonds to obtain the magnetic nanoparticles rich in carboxyl groups on the surface. Then octavinyl-POSS and double bonds on the surfaces of the nano particles are subjected to click modification to form an octahedral cage, 4-mercaptobenzoic acid and double bonds are further subjected to click modification, the surfaces of the nano particles are rich in carboxyl, and a polymer brush rich in carboxyl is constructed. Compared with a conventional streptavidin coupling method, a high-density polymer chain provides a large number of carboxyl active binding sites, so that the streptavidin coupling amount is increased, the antibody coupling rate is increased, and a solution is provided for applications such as high-sensitivity biological detection, efficient targeted drug delivery and stable immunoassay.

The invention provides unsaturated waterborne polyurethane, a polyurethane composite material as well as a preparation method and application of the unsaturated waterborne polyurethane and the polyurethane composite material. According to the preparation method, isocyanate is introduced into a soft segment through a block process, an unsaturated chain extender is added, unsaturated double bonds are introduced, and waterborne polyurethane with excellent performance is prepared. Meanwhile, cellulose nanofibers are added into the unsaturated waterborne polyurethane, so that the interfacial compatibility and mechanical properties of the unsaturated waterborne polyurethane are improved. The unsaturated waterborne polyurethane provided by the invention has excellent film-forming property, stability and mechanical property.

The invention relates to a method for constructing a composite super-hydrophobic coating through double bonding. The preparation method comprises the following steps: taking a clean copper sheet which is not pretreated as a substrate, dipping the copper sheet in a suspension consisting of nanoparticles and sulfydryl-containing siloxane ethanol, taking out, washing, drying, dipping in a perfluoromercaptan ethanol solution, taking out, washing, and drying to obtain the copper-based super-hydrophobic surface coating. The coating prepared by the method has excellent super-hydrophobicity, icing resistance and stability. Different from an existing conventional preparation method, the method has the advantages that pretreatment operation such as abrasive paper polishing, strong acid etching or anodic oxidation does not need to be carried out on a copper sheet, and micro-nano roughening and low-surface-energy self-assembly can be completed on the copper surface only through two-step normal-temperature dipping. The method is simple in preparation process, mild in condition, free of expensive equipment, thin in coating thickness and small in influence on electric conduction and heat conduction of the copper substrate, intrinsic performance of copper can be reserved, the electric conduction / heat conduction characteristic of the copper substrate is considered, and the method has wide application value and prospects.

The present invention belongs to the fields of pyrolyzed carbon black reinforcement, and the manufacturing of tires and non-tire rubber products. Provided are an interfacial reinforcing agent for pyrolyzed carbon black, and reinforced pyrolyzed carbon black and the use thereof. The interfacial reinforcing agent for pyrolyzed carbon black comprises the following components in parts by mass: 0.1-10 parts of a main interfacial reinforcing agent and 0.1-3 parts of an auxiliary interfacial reinforcing agent, wherein the main interfacial reinforcing agent comprises one or more of a nitrogen-containing compound, an active-double-bond-containing compound and a sulfur-containing compound; and the auxiliary interfacial reinforcing agent comprises one or more of a coupling agent compound, an organic acid compound and an amide compound. With regard to different functional groups (including double bonds, oxygen-containing functional groups, etc.) contained in the surface of the pyrolyzed carbon black, a suitable interfacial reinforcing agent is selected for modification to make the interfacial reinforcing agent react with the surface of pyrolyzed carbon black, thereby improving the tensile strength of the modified pyrolyzed carbon black in a rubber system.

The invention discloses a method for synthesizing a dichloroacetyl compound, which comprises the following steps: tetrachloroethylene and an acid are subjected to an addition reaction at 100-200 DEG C to obtain an adduct, then the adduct is subjected to an acidolysis, hydrolysis or alcoholysis reaction to obtain the dichloroacetyl compound, the acid for the addition reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid, and the acid for the alcoholysis reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid. The molar ratio of the tetrachloroethylene to the acid is 1: (1-10). By controlling the types of acids and increasing the temperature of the addition reaction, the addition reaction of tetrachloroethylene and acids in the absence of a catalyst is realized. Double bonds of tetrachloroethylene and hydrogen protons are subjected to an addition reaction in a strong acid environment to form a cationic intermediate, then the cationic intermediate is combined with acid radical anions to form an adduct, and the adduct intermediate is high in activity, unstable and free of separation and can be directly subjected to a hydrolysis reaction, an acidolysis reaction or an alcoholysis reaction with another substrate (such as water, acid or alcohol) respectively. The synthesis of dichloroacetyl series compounds is realized, and the route has universality and diversity.

The invention discloses a migration-resistant macromolecular anti-aging agent as well as a preparation method and application thereof, and belongs to the technical field of anti-aging agents. The preparation method comprises the following steps: putting p-aminodiphenylamine into a reaction container; heating the reaction container, and stirring the interior of the reaction container by using a stirrer; dropwise adding glycidyl methacrylate into the reaction container; performing constant-temperature reaction for a period of time to obtain a reaction material; adding white carbon black, pouring reaction materials into a barrel of a high-speed stirring dispersion machine, and stirring and mixing; and taking out the powdery product to obtain the migration-resistant macromolecular anti-aging agent. According to the migration-resistant macromolecular anti-aging agent, p-aminodiphenylamine and glycidyl methacrylate serve as raw materials, the macromolecular anti-aging agent containing double bonds and hydroxyl is prepared through amino ring-opening epoxy reaction, the migration resistance of the anti-aging agent can be greatly improved through combination of the carbon-carbon double bonds and the structure on the surface of rubber, meanwhile, the hydroxyl can capture free radicals, and the migration resistance of the anti-aging agent is improved. The aging process of the rubber is delayed and the service life is prolonged.

The invention provides a composite photo-initiation system electronic adhesive as well as a preparation method and application thereof, and relates to the technical field of anisotropic conductive adhesive films. The adhesive comprises a thermoplastic resin solution, an acrylate monomer, epoxy resin, a polyfunctional oligomer solution containing a carbon-carbon double bond and an epoxy group, an insulating inorganic filler, conductive particles and a composite photoinitiator solution, wherein the composite photoinitiator is composed of a free radical photoinitiator and a cationic photoinitiator, and acrylate free radical chain polymerization and epoxy resin cationic ring opening polymerization are synchronously triggered through ultraviolet light; and the polyfunctional oligomer is used as a molecular bridge to bond the two-phase curing network to form an interpenetrating cross-linked structure. The electronic adhesive provided by the invention realizes low-temperature rapid curing for 1-15 seconds, the curing shrinkage rate is reduced to below 1%, the reliability defect caused by oxygen inhibition, high shrinkage rate and phase separation of a traditional single system is solved, and the electronic adhesive is suitable for low-temperature efficient packaging of high-precision electronic components.

The invention discloses a super-tough temperature-resistant self-repairing copolymer based on SBS acrylate dynamic synergistic reinforcement and a preparation method thereof, and belongs to the technical field of self-repairing materials in compositions of high-molecular compounds. The copolymer comprises SBS, an acrylate monomer, a dynamic bond functional monomer, an initiator, a cross-linking agent, a nano reinforcing agent and a temperature-resistant modifier, wherein the dynamic bond functional monomer comprises at least one of acryloyloxyethyl disulfide, acrylamide acryloyloxyethyl disulfide or anthracene methyl acrylate. The molecular structure of the dynamic bond functional monomer contains a carbon-carbon double bond and a disulfide bond, in the free radical polymerization reaction initiated by the initiator, the carbon-carbon double bond is opened and is subjected to a copolymerization reaction with an SBS chain segment or an acrylate chain segment, so that the disulfide bond enters the polymer chain segment, the dynamic disulfide bond can be reversibly broken and recombined at high temperature, and the dynamic bond functional monomer is obtained. The high-temperature viscoelasticity is maintained, the material is endowed with self-repairing capability, and the problem that the viscoelasticity of the material in the prior art is sharply reduced at high temperature (gt; 120 DEG C) is solved.

Disclosed is a curable composition which contains: a curable component that is radically polymerizable and contains an ethylenically unsaturated double bond; and an inorganic filler that is at least one substance which is selected from the group consisting of titanium oxide, calcium titanate and strontium titanate.

The invention relates to polyethylene wax with a reversible crosslinking characteristic and a preparation method and application thereof, and relates to the field of polymer functional aids and processing and application thereof. The polyethylene wax with the reversible cross-linking characteristic is prepared from three monomers of furyl ethylene, maleimide ethylene and ethylene through double-bond addition copolymerization, and the number-average molecular weight is 1000-100000. The polyethylene wax provided by the invention can be used as a flow modifier during polyethylene material processing and a cross-linking modifier during use. The low molecular weight polyethylene wax can reduce the energy consumption of processing equipment and increase the flatness of the product. And meanwhile, the reversible crosslinking of furan and maleimide groups on the chain segment can endow the resin with thermoset property in use and thermoplastic cycle processability after use.

The invention discloses a temperature-resistant flame-retardant antibacterial composite polypropylene pipe for water supply, and belongs to the technical field of polypropylene pipes. The pipe is prepared by blending and extruding the following components in parts by weight: 70-80 parts of polypropylene random copolymer, 3-8 parts of modified organosilicon copolymer, 5-15 parts of maleic anhydride grafted polypropylene, 8-15 parts of polyolefin thermoplastic elastomer, an initiator, talcum powder, aluminum hydroxide, nano silicon dioxide, a lubricant, an antioxidant and the like. The modified organic silicon copolymer is prepared through specific steps, and the structure of the modified organic silicon copolymer contains a rigid oxa-phospho-spiro ring, a flexible organic silicon chain segment and a terminal guanidyl group. The rigid structure of the modified organic silicon copolymer is combined with the flexible chain segment, the temperature resistance and low-temperature toughness are improved, the flame retardant effect is achieved through cooperation of the oxa-phospho-spiro ring, the aluminum hydroxide and the organic silicon chain segment, and the molten drop tendency is reduced; guanidyl at the tail end endows long-acting antibacterial performance; vinyl double bonds of the organosilicone chain segment react with polypropylene to form a cross-linked network, so that the high-temperature stability and the creep resistance are improved.

The invention belongs to the technical field of oilfield chemistry, and particularly relates to application of a hyperbranched zwitterionic polymer in high-temperature and high-salinity drilling fluid. The hyperbranched zwitterionic polymer is prepared by carrying out Michael addition reaction on polyethyleneimine and a monomer which is neutralized by alkali and contains double bonds and sulfonic acid groups; the polymer has a hyperbranched structure, and the amphoteric ion characteristic that an amino group from polyethyleneimine on a molecular chain and a sulfonic acid group from a monomer form an inner salt structure; the hyperbranched zwitterionic polymer is used as an inhibitor and a viscosity reducer of the drilling fluid. According to the hyperbranched zwitterionic polymer provided by the invention, the salt tolerance and high-temperature stability of the polymer are enhanced by introducing a sulfonate group; the polymer is endowed with low viscosity and high adsorption capacity through a hyperbranched structure, the viscosity of the drilling fluid can be effectively reduced, and clay hydration is inhibited; clay particles are stabilized through electrostatic interaction by zwitterionic characteristics, and the rheological property of the drilling fluid is optimized.

The invention relates to the technical field of composite materials, in particular to a polyaryletherketone-based shape memory composite material and a preparation method thereof. Comprising a terpolymer, shape memory polyurethane, a first heat-conducting filler and a second heat-conducting filler, 4, 4 '-difluorobenzophenone and hydroquinone are firstly pre-polymerized to obtain a PEEK prepolymer, the PEEK prepolymer is terminated by a hydroxyl olefine acid ester monomer to obtain a terminated copolymer, and then an acrylate monomer and the terminated copolymer are subjected to double-bond addition to obtain the terpolymer; the first heat-conducting filler is a one-dimensional nano heat-conducting filler; the second heat-conducting filler is a zero-dimensional and / or two-dimensional heat-conducting substance; the prepared composite material has the shape fixing rate of 85% or above and the shape recovery rate of 87% or above, the recovery time is shorter than 25 seconds, and the good shape memory performance is achieved.

The present invention is an addition-curable silicone composition containing components (A) to (C): (A) An addition reaction product of an organopolysiloxane represented by formula (1) and a compound represented by formula (2), the addition reaction product having two addition-reactive carbon-carbon double bonds per molecule. (1) (R1 is a C1-12 monovalent hydrocarbon group, R2 is a methyl group or a phenyl group, a is an integer of 0-50, and b is an integer of 0-300. ), (2) (R3 represents a C1-12 divalent hydrocarbon group.), (B) an organosilicon compound having a hydrogen atom bonded to at least two silicon atoms per molecule, and (C) a hydrosilylation reaction catalyst. Thus, provided are an addition-curable silicone composition that has high transparency and a high refractive index and yields a cured product having high strength and high elongation and a highly reliable optical semiconductor device sealed by a cured product thereof.

The invention provides a polymer electrolyte, a secondary battery and a preparation method of the polymer electrolyte and the secondary battery. The non-aqueous electrolyte comprises an organic solvent, an electrolyte salt, a borate derivative with the mass fraction of 0.1%-15%, a sulfonyl-containing cross-linking agent A with the mass fraction of 0.1%-4%, a cross-linking agent B at least containing three carbon-carbon double bonds and an initiator, the mass ratio of the cross-linking agent B to the cross-linking agent A is (1-100): 1, the mass fraction of the borate derivative is 0.1%-15%, the mass fraction of the sulfonyl-containing cross-linking agent A is 0.1%-4%, and the mass fraction of the initiator is 0.1%-1%. The mass ratio of the sum of the mass of the borate derivative, the cross-linking agent A and the cross-linking agent B to the mass of the initiator is (1000-20): 1. The polymer electrolyte provided by the invention has high ionic conductivity, can improve the safety performance of a battery in a high proportion state, and can maintain good cycle performance at the same time.

The invention discloses a cable with a co-extrusion self-foaming ceramic fireproof layer and a preparation method of the cable, and belongs to the technical field of polyolefin cables. The cable comprises a conductor, an insulating layer and a fireproof layer from inside to outside, comprising the following raw materials: 40-60 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of a polyolefin elastomer, 20-30 parts of a ceramic precursor filler, 5-10 parts of a compatilizer, 5-10 parts of a cosolvent, 3-5 parts of a flexibilizer, 2-4 parts of a main foaming agent, 1-2 parts of an auxiliary foaming agent, 1-3 parts of a lubricant and 0.5-1.5 parts of an antioxidant. The compatilizer is siloxane containing sulfydryl and phosphaphenanthrene groups, and the flexibilizer is silane coupling agent modified quartz fibers containing double bonds. In a matrix of the ethylene-vinyl acetate copolymer and the polyolefin elastomer, the compatilizer and the flexibilizer are added, so that the fireproof layer is endowed with better impact resistance and flame retardance.

The invention belongs to the field of RAFT (reversible addition-fragmentation chain transfer) polymerization reaction, and particularly discloses a macromolecular RAFT polymer, a preparation method and application of the macromolecular RAFT polymer in RAFT reaction. The macromolecular RAFT polymer at least comprises a block Z-[A] x-b-[B] y; wherein Z is a small molecule RAFT group; the block [A] x is formed by double-bond addition polymerization of hydrophilic monomers, and the hydrophilic monomers are C7-C20 quaternary ammonium salt monomers and / or sulfonate monomers; the block [B] y is formed by double-bond addition polymerization of a hydrophobic monomer, and the hydrophobic monomer is a C10-C22 methacrylate or acrylate monomer. The hydrophilic monomer with the quaternary ammonium salt monomer and / or the sulfonate monomer is selected to construct the hydrophilic chain segment, and meanwhile, the C10-C22 acrylate monomer / methacrylate monomer with strong hydrophobicity is introduced, so that the emulsifying property of the macromolecular RAFT reagent is improved.

The invention relates to an EPEG slump retaining agent and a preparation method thereof, and the EPEG slump retaining agent is prepared from the following raw materials in parts by weight: 160-180 parts of ethylene glycol monovinyl polyethylene glycol ether monomer; 25-35 parts of an unsaturated acid monomer; 20 to 25 parts of an unsaturated slow-release ester functional monomer; 12-18 parts of an unsaturated double-bond siloxane functional monomer; 10-15 parts of a modified core-shell functional monomer; 6-8 parts of a rigid functional monomer; 10 to 15 parts of an initiator; 5-8 parts of a transfer agent; and 200 to 220 parts of water. The EPEG slump retaining agent and the preparation method of the EPEG slump retaining agent are prepared by performing molecular design and key synthesis technology research on a polycarboxylic acid high-performance polycarboxylic acid slump retaining agent, and the long-acting slump retaining capacity and the slow-release dispersing capacity of the polycarboxylic acid slump retaining agent in cement concrete are further improved.

The invention discloses a high-performance thermosetting resin plugging material, a preparation method and a water-based drilling fluid, and relates to the technical field of oilfield chemistry, and the preparation method of the plugging material comprises the following steps: stirring an aromatic compound containing two double bonds with sodium tungstate, a transfer catalyst and a hydrogen peroxide solution at room temperature for reaction, and purifying to obtain an epoxy compound; the preparation method comprises the following steps: heating an aromatic compound containing an aldehyde group, ammonium formate and a palladium-carbon catalyst with nitrogen to react to obtain an amine compound, transferring the epoxy compound and the amine compound into a size-adjustable mold, carrying out heating curing treatment, carrying out low-temperature ball milling on a crude product to obtain plugging material particles, and preparing the water-based drilling fluid by using the plugging material particles. The specific aromatic rigid framework monomer is selected, and the molar ratio of epoxy to the curing agent is accurately controlled, so that the mechanical strength and thermal stability of the material are remarkably optimized, and the plugging material has a good treatment effect on cracks and pores in complex stratums.

The invention discloses a hyperbranched polyether branching agent with an adjustable structure and a preparation method and application thereof.According to the branching agent, 3-butene-1-alcohol serves as an initiator, a hyperbranched skeleton is constructed through anion ring-opening polymerization reaction and diglycidyl ether, then esterification and end capping are conducted through anhydride, and the hyperbranched polyether branching agent with the adjustable structure is obtained. The tail end of the hyperbranched polyether contains vinyl double bonds, and the ester group structure of the hyperbranched polyether can be regulated and controlled. Different diepoxy compounds are selected to control a main chain structure, and different anhydrides are used for regulating and controlling the chemical composition of branched chains, so that accurate design of molecular weight, polarity and number of functional groups of the branching agent is realized. The branching agent has excellent dissolvability in common organic solvents, and solves the problem of poor dissolvability of the traditional polydiene branching agent. When the star-shaped branched butyl rubber is applied to the synthesis of star-shaped branched butyl rubber, the distribution and number of branched points can be accurately regulated and controlled, the weight-average molecular weight and molecular weight distribution index of the rubber are remarkably improved, and the side reaction of gel is avoided.