409 results about "Epichlorohydrin" patented technology

The invention provides a soybean protein nanoparticle coagulant for removing perfluorinated compounds in water as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing N, N-dimethyl hexadecylamine and epoxy chloropropane into a reaction precursor, namely epoxy propyl hexadecyl dimethyl ammonium chloride; meanwhile, hydrolyzing the soybean protein isolate by using protease to obtain a hydrolyzed soybean protein solution; enabling the epoxy group on the epoxy propyl hexadecyl dimethyl ammonium chloride and the amino group on the hydrolyzed soybean protein to be subjected to ring-opening addition reaction so as to be grafted to the hydrolyzed soybean protein, and adding acetone to generate precipitate after the reaction is finished; and collecting the precipitate, washing and drying to obtain the soybean protein nanoparticle coagulant for removing the perfluorinated compounds in the water. The soybean protein nanoparticle coagulant prepared by the invention utilizes strong electrostatic interaction and hydrophobic interaction, the removal capacity and selectivity of the soybean protein nanoparticle coagulant on PFAS are far higher than those of a traditional coagulant, and the soybean protein nanoparticle coagulant has excellent removal efficiency and remarkable anti-interference capability.

The invention discloses a preparation method of high-viscosity cationic starch, which belongs to the technical field of modified starch, and comprises the following steps: crosslinking epichlorohydrin, ball-milling and cationizing; the epoxy chloropropane crosslinking comprises the following steps: mixing starch, calcium hydroxide and deionized water, stirring at 40-50 DEG C, adding sodium stearoyl lactylate, stirring at 50-55 DEG C, naturally cooling to room temperature, adding sodium chloride and epoxy chloropropane, stirring, dropwise adding a potassium hydroxide aqueous solution, stirring, adjusting the pH value to 6, filtering, taking filter residues, washing and drying to obtain crosslinked starch; in the step of ball milling, calcium hydroxide, sucrose fatty acid ester SE-11 and deionized water are mixed and then subjected to ball milling, and a ball-milled material is obtained; the prepared high-viscosity cationic starch is high in paste liquid viscosity and cationic substitution degree, good in paste liquid viscosity stability, uniform in substitution degree and paste liquid viscosity, high in reaction efficiency in cationization and low in alkali consumption.

A preparation method of the cardanol-based phosphorus-containing side group novolac epoxy resin comprises the following steps: (1) in the presence of a catalyst A, carrying out a stirring reaction on cardanol and an aldehyde compound at 80-110 DEG C for 3-10 h to prepare an intermediate A; (2) stirring the intermediate A and a phosphorus-containing compound at 50-150 DEG C to react for 10-24 hours to prepare an intermediate B; and (3) in the presence of a catalyst B, stirring and reacting the intermediate B and epichlorohydrin at 70-110 DEG C for 2-6 hours, and in the presence of a catalyst C, stirring and reacting at 30-65 DEG C for 1-4 hours to prepare the cardanol-based phosphorus-containing side group novolac epoxy resin. Through a rigid structure on a main chain of the novolac epoxy resin, a phosphorus-containing structure on a side chain of the novolac epoxy resin and an epoxy group, the toughness and flame retardance of an epoxy cured product can be improved on the premise that the thermal stability is not reduced, and the novolac epoxy resin has an extremely good application research prospect.

The invention provides epoxy resin for halogen-free flame-retardant self-leveling powder coating and a preparation method of the epoxy resin, and belongs to the technical field of powder coating. The flame retardant is mainly prepared from anhydrous piperazine, bisphenol A diglycidyl ether, trihydroxymethyl phosphorus oxide, triethyl phosphite, epoxy chloropropane, sodium hydroxide, N-methyl iminodiacetic acid, ethylene glycol diglycidyl ether and other main raw materials through polymerization. The prepared epoxy resin and 2-phenylimidazoline are subjected to low-temperature curing (135 DEG C / 20 min) on the premise that an additional flatting agent does not need to be used, the flexibility of a coating film is good, the impact resistance grade is high, the impact performance reaches the condition that no cracking phenomenon exists in the front and back 60cm, the leveling grade reaches the grade 7 or above, the gloss is high and reaches 95% or above, the oxygen index reaches 34% or above, and the halogen-free flame retardant performance is excellent.

The invention relates to the technical field of ink, in particular to modified filler environment-friendly ink and a preparation method thereof. The modified filler environment-friendly printing ink is prepared from the following raw materials in parts by mass: 20 to 40 parts of waterborne acrylic emulsion, 10 to 20 parts of polyurethane acrylate prepolymer, 1 to 5 parts of bis (trimethylolpropane) tetraacrylate, 10 to 20 parts of pentaerythritol tetraacrylate, 5 to 10 parts of mica powder, 1 to 2 parts of 3-aminopropyltriethoxysilane, 0.1 to 1 part of epoxy chloropropane and 5 to 10 parts of amino-terminated polyamidoamine. The coating is prepared from the following components in parts by weight: 1-2 parts of a photoinitiator, 1-3 parts of a dispersing agent, 1-2 parts of a reactive diluent, 1-2 parts of an organic silicon defoaming agent, 0.5-1.5 parts of a mildew preventive, 0.1-1 part of a thixotropic agent, 5-15 parts of pigment, 1-5 parts of kaolin, 5-10 parts of polyethylene wax and 1-5 parts of water. The obtained ink is good in dispersion stability, good in flexibility after being cured and excellent in adhesive force.

The invention discloses an alkenyl epoxidation method, an epoxy resin monomer and application thereof, and belongs to the field of compound synthesis. Aiming at the problems of high halogen content and low preparation universality of the existing epoxy resin monomer, the invention provides an alkenyl epoxidation method which comprises the following steps: dissolving an aromatic compound in an organic solvent, adding an oxidant and a catalyst into the organic solvent, and extracting after complete reaction to obtain the epoxy resin monomer, the preparation method of the catalyst comprises the following steps: dispersing phosphotungstic acid in hydrogen peroxide to obtain an emulsion; adding a trichloromethane solution of cetylpyridinium chloride into the emulsion, and performing liquid separation after the reaction is completed to obtain a catalyst precursor; the catalyst is obtained. The specific catalyst is used, so that the subsequent reaction catalysis efficiency is higher, and the universality is higher; and no epoxy chloropropane is introduced in the whole process of the alkenyl epoxidation method, so that the halogen content of the finally prepared epoxy resin monomer is low, and the limitation barrier that the use of the conventional epoxy resin monomer is limited due to high halogen content is broken through.

The invention discloses a water treatment filtering material and a preparation method thereof, and relates to the technical field of water treatment. When the water treatment filtering material is prepared, alkaline lignin, epichlorohydrin and triethylenetetramine are subjected to a reaction through a reverse suspension cross-linking technology, and lignin porous microspheres are prepared; carrying out reaction on the lignin porous microspheres and picolinamide ligands to obtain modified lignin porous microspheres; 3-mercaptopropyltriethoxysilane and titanium dioxide are subjected to a reaction, and modified titanium dioxide is prepared; the preparation method comprises the following steps: reacting pyromellitic dianhydride, 1, 4-diaminobutylene and 4 ', 4-diaminodiphenyl ether to prepare functionalized polyamide; the functional polyamide, the modified lignin porous microspheres and the modified titanium dioxide are prepared into a spinning solution, and a polyamide membrane is prepared through electrostatic spinning; and carrying out liquid reaction on bromohexane on the polyamide membrane to obtain the water treatment filtering material. The prepared water treatment filtering material has excellent antibacterial property, heavy metal adsorption property, dye removal property and mechanical property.

The invention discloses a microbial soil conditioner and a preparation method thereof, and relates to the technical field of soil improvement. The method comprises the following steps: culturing heavy metal-resistant chlorella and aspergillus niger to obtain a mixed bacterial suspension, combining the mixed bacterial suspension with a composite chelating modifier prepared by reacting chitosan quaternary ammonium salt, ethylenediamine tetraacetic acid and epichlorohydrin, carrying out crosslinking by using genipin to obtain a functional microbial agent, and carrying out pyrolysis and acid oxidation on corn straws as a raw material to obtain the heavy metal-resistant chlorella modified functional microbial agent. The preparation method comprises the following steps: preparing a nano zero-valent iron-biochar composite material, reducing and loading ferrous ions through sodium borohydride, preparing the nano zero-valent iron-biochar composite material, mixing the nano zero-valent iron-biochar composite material with zeolite, bentonite and a silane coupling agent, carrying out spray drying to prepare a porous carrier substance, and finally stirring and mixing an organic fertilizer complex microbial inoculant, the functional microbial inoculant and the carrier substance, and aging to prepare the soil conditioner. The prepared conditioner has a good remediation effect on soil heavy metal pollution.

The invention relates to the technical field of organic chemical synthesis, and discloses a continuous production process of a cationic etherifying agent, which comprises the following steps: taking trimethylamine hydrochloride and epoxy chloropropane as raw materials; the method comprises the following six steps: raw material pretreatment, premixing, continuous reaction, continuous separation, refining and product storage: mixing and dissolving trimethylamine hydrochloride and a solvent, preparing a catalyst solution, uniformly mixing the three materials through a static mixer, feeding into a multi-stage tubular reactor, and carrying out segmented temperature control continuous reaction, and performing flash evaporation solvent removal and rectification on the reaction product to obtain a crude product, and performing ion exchange impurity removal and reduced pressure distillation refining to finally obtain a high-purity product. The method solves the problems of low yield and more byproducts in the traditional process, and is suitable for industrial large-scale production.

The invention provides halogen-free flame-retardant liquid epoxy resin, solid epoxy resin for powder coating and a preparation method of the solid epoxy resin, and belongs to the technical field of powder coating. The liquid epoxy resin disclosed by the invention is prepared by polymerizing 2, 4-diamino-6-phenyl-1, 3, 5-triazine, formaldehyde, triethyl phosphite, epoxy chloropropane, sodium hydroxide, DMF (Dimethyl Formamide) and the like. The contents of halogen-free flame-retardant elements nitrogen and phosphorus in the product are high, a solid epoxy resin product obtained by carrying out chain extension on liquid epoxy resin serving as a synthetic monomer of solid epoxy resin of the powder coating and bisphenol F is good in flame retardance, the oxygen index reaches 37% or above, and the flame retardance is high. A coating film obtained after the powder coating and an accelerated dicyandiamide curing agent are subjected to low-temperature rapid curing (150 DEG C / 10 min) is high in gloss and leveling grade and good in impact resistance, hardness and the like, and the application requirements of the powder coating are met.

The invention relates to the technical field of membrane material preparation, and particularly discloses an oil-water separation membrane and a preparation method thereof.The oil-water separation membrane is characterized in that polyethyleneimine is grafted to zeolite powder under the action of a cross-linking agent epichlorohydrin, and a large number of amido groups on a polyethyleneimine chain can serve as effective chelating coordination sites of metal ions in subsequent steps; meanwhile, polyethyleneimine has excellent hydrophilic performance and is grafted on the zeolite powder, so that the hydrophilic performance of the zeolite powder is improved; then, three metal salts of magnesium, aluminum and cerium are compounded with urea on the surface of the PEI grafted zeolite through a hydrothermal reaction to generate a composite metal hydroxide structure, Mg and Al form a basic framework of a layered double-metal hydroxide structure, oxygen vacancy defects can be easily formed by doping Ce, and the defects can adsorb water molecules, so that a stable hydration layer is formed on the surface of the material, and the surface of the material is protected; the excellent super-hydrophilicity is shown.

This invention discloses a cationic etherifying agent and its preparation method, belonging to the field of cationic etherifying agent production technology. The preparation method includes: continuously feeding trimethylamine and hydrochloric acid into a raw material pretreatment unit, pre-cooling to -10~20℃; entering a first tubular reactor, reacting at -10℃~20℃ and 0.15MPa for 10~60 minutes to generate trimethylammonium chloride; trimethylammonium chloride and epichlorohydrin entering a static mixer, simultaneously adding a catalyst and an organic amine; entering a second tubular reactor, reacting at 10~50℃ and 0.2MPa for 1~3 hours; during the reaction, monitoring the chloride ion concentration and epichlorohydrin residue in real time, dynamically adjusting the reaction parameters; filtering the reaction product through a nanofiltration membrane to obtain a high-purity cationic etherifying agent. This invention employs a continuous tubular reaction process combined with automatic control and nanofiltration membrane separation, resulting in a short production cycle, low energy consumption, few by-products, and a high-purity, odorless product, showing good industrial application prospects.

The invention provides an environment-friendly low-chlorine wet strength agent and a preparation method and application thereof.The preparation method comprises the steps that adipic acid and tetraethylenepentamine are mixed and react for 2-6 h at the temperature of 170-190 DEG C, and a prepolymer is obtained; cooling the prepolymer to 120-140 DEG C, adding a modifier, carrying out a heat preservation reaction for 2-3 h, and adding deionized water to adjust the solid content to 55-65% so as to obtain a modified polyamide solution; adding a cationizing agent and epoxy chloropropane into the modified polyamide solution, heating to 65-75 DEG C, reacting, and adding acid to adjust the pH value to 2.5-4.5 when the viscosity of the system reaches 50-80 mPa.s; adding sodium hydrogen sulfite, and carrying out heat preservation reaction for 1-2 hours; and adding deionized water to adjust the solid content to 12-13%, thereby obtaining the environment-friendly low-chlorine wet strength agent. The specific modifier is adopted to modify a polyamide main chain, and the cationizing agent is introduced, so that the prepared wet strength agent not only can remarkably reduce the content of organic chlorine in a product, but also can improve the dry and wet strength, water resistance and folding resistance of paper. In addition, the product can also shorten the curing time of the paper.

This invention discloses a weather-resistant, high-hardness composite anti-corrosion coating and its preparation method, belonging to the field of anti-corrosion coating technology. The preparation method includes: firstly, synthesizing an epoxy resin containing dynamic disulfide bonds by reacting dithiodibenzoic acid and epichlorohydrin in an alkaline aqueous phase; secondly, constructing a low surface energy siloxane network using hydroxyl-terminated polydimethylsiloxane and methyltriethoxysilane; subsequently, introducing chlorzoxazone and N-acetyl-p-aminophenol as composite organic corrosion inhibitors, blending them with the resin to obtain a composite base material; finally, adding graphene, carbon nanotubes, and inorganic anti-corrosion fillers, and cross-linking and curing to form a film using a polyamine curing agent. This invention suppresses microcracks through the dynamic stress relief of disulfide bonds, combined with the weather-resistant barrier of the siloxane network, the active interface passivation of the heteroatom corrosion inhibitor, and the three-dimensional synergistic mechanical bonding of carbon-based nanomaterials, achieving a perfect unity of ultra-strong corrosion resistance, excellent weather resistance, and high mechanical hardness in the coating.

This invention discloses a microchannel continuous preparation method for S-(-)-bioprolol fumarate intermediates, belonging to the field of medicinal chemistry technology. The method includes dissolving 4-isopropoxyethoxymethylphenol and a base in a solvent to provide a mixture; and contacting R-epoxychloropropane with the mixture in a microchannel reactor to react and form [[4-[[2-(1-methylethoxy)ethoxy]methyl]phenoxy]methyl]ethylene oxide. This invention overcomes the shortcomings of low reaction yield and long reaction time in existing technologies. By synergistically adjusting the material concentration, flow rate, residence time, and other reaction conditions, it improves reaction efficiency, shortens the reaction cycle, and increases the molar yield to over 70%. It significantly surpasses traditional batch reactions in terms of reaction efficiency, reaction time, and byproduct control.

The invention belongs to the technical field of high polymer material modification, particularly relates to a modified nylon interventional catheter, and further discloses a preparation method and application of the modified nylon interventional catheter. The surface of the modified nylon interventional catheter is activated through an acid solution, and an epoxy group is introduced to a nylon molecular chain based on epoxy chloropropane; and carrying out covalent grafting of hydrophilic macromolecules by using polyethyleneimine. According to the modified nylon interventional catheter, the hydrophilic effect of the nylon catheter subjected to functionalization and hydrophilic modification treatment is obviously enhanced, the friction coefficient is obviously reduced, and the problem that the surface lubricity of the nylon catheter is insufficient is effectively solved.

The invention discloses phosphorus-doped titanium dioxide modified chitosan hydrogel electrolyte as well as a preparation method and application thereof, and belongs to the technical field of hydrogel electrolyte. Comprising a phosphorus-doped titanium dioxide modified chitosan network and graphene quantum dot modified lignin fibers, the phosphorus-doped titanium dioxide modified chitosan network forms a three-dimensional chemical cross-linked network through epoxy chloropropane cross-linking, and the graphene quantum dot modified lignin fibers are dispersed in the chemical cross-linked network and serve as physical cross-linked points, so that a chemical-physical double-cross-linked network structure is jointly formed, and the basic ions are loaded in the chemical-physical double-cross-linked network structure. Through the design, the problems that a traditional hydrogel electrolyte is low in mechanical strength and insufficient in ionic conductivity are solved, and the hydrogel has high mechanical strength, excellent low-temperature freezing resistance and high ionic conductivity and is suitable for a battery electrolyte in a low-temperature environment.

This invention discloses a method for preparing a zinc-based solid electrolyte membrane based on a polycarbonate-based ionic liquid. In the presence of a catalyst, carbon dioxide and epichlorohydrin are alternately copolymerized at 25-70°C and 2.0-4.0 MPa carbon dioxide to obtain a polycarbonate with chloromethyl side groups, which is then purified by dissolution / precipitation. A side group substitution reaction is carried out by adding 1-methylimidazolium to a polar solvent to obtain an imidazolium halide-type ionized polycarbonate. Subsequently, a zinc-free solution is used... 2+ The zinc-based solid polymer electrolyte membrane was obtained by anion exchange with TFSI-salt followed by desalting and purification. The ionic liquid was then mixed with zinc salt, and a membrane was fabricated using a casting method, followed by drying and peeling to obtain the membrane. The large volume and high degree of charge delocalization of anions in the ionic liquid are beneficial for reducing ion-pair interactions, providing a better ion transport environment for the zinc-based solid electrolyte membrane and addressing the issue of Zn content in existing zinc-based solid electrolytes. 2+ It has strong interactions with anions and polymer polar groups, which can easily lead to increased resistance to ion migration.

The invention belongs to the technical field of ceramics, and particularly relates to a preparation method of antibacterial ceramics and an antibacterial ceramic product. The method comprises the following steps: firstly, preparing a ceramic matrix with a compact structure through wet co-grinding, molding and sintering; performing chemical vapor deposition on the surface of the substrate to form a layer of silicon dioxide film; then, a KH550 silane coupling agent is used for surface activation; finally, in the nitrogen atmosphere, 4, 4 '-bipyridine reacts with epoxy chloropropane to form a quaternary ammonium pyridine antibacterial layer on the surface through grafting. The antibacterial functional group is firmly anchored on the surface of the ceramic in a full chemical bonding manner, so that the problems that a traditional physical coating is easy to fall off and is not durable are solved. The obtained antibacterial ceramic has efficient, broad-spectrum and lasting antibacterial performance, the antibacterial rate is still kept at 98.8% or above after friction, and the antibacterial ceramic is suitable for the fields of daily supplies, building decoration, sanitary ware and the like.

The invention discloses a preparation method of phosphorus-containing side group novolac epoxy resin, the phosphorus-containing side group novolac epoxy resin is prepared by reacting allyl-containing binary aromatic phenol, a phosphorus-containing compound, an aldehyde compound and epichlorohydrin, the preparation method comprises the following steps: (1) stirring the allyl-containing binary aromatic phenol and the phosphorus-containing compound at 100-190 DEG C to react for 6-30 hours to prepare an intermediate A; (2) in the presence of a catalyst A, stirring and reacting the intermediate A and an aldehyde compound at 60-130 DEG C for 3-12 hours to prepare an intermediate B; and (3) in the presence of a catalyst B, stirring the intermediate B and epichlorohydrin to react for 2-6 hours at 70-110 DEG C, and then in the presence of a catalyst C, stirring the intermediate B and epichlorohydrin to react for 2-6 hours at 30-65 DEG C to prepare the phosphorus-containing side group novolac epoxy resin. According to the phosphorus-containing side group novolac epoxy resin prepared by the preparation method disclosed by the invention, the toughness of a cured epoxy material can be improved while the safety and fire resistance of the cured epoxy material are improved.

The application discloses a ship polyvinyl chloride sheath cable and a preparation method thereof, and relates to the technical field of polyvinyl chloride sheath cables. Firstly, 2-vinylbenzoic acid and epichlorohydrin are subjected to ring-opening esterification reaction, and the two are combined together through the chemical reaction. Then, sodium hydroxide is added to the reaction system, and the reaction is further promoted to the direction of generating an epoxy group by removing hydrogen chloride, so that an epoxy group is successfully introduced into the molecular structure of 2-vinylbenzoic acid, and a multifunctional additive is prepared. The newly developed additive is applied to the production process of the ship polyvinyl chloride sheath cable, so that the cable has the characteristics of oil resistance, water resistance and corrosion resistance, and the flame retardation performance and long-term antioxidant capacity of the cable are significantly improved.

The present application relates to the technical field of cable, in particular to a kind of anti-aging cable and preparation method thereof.The cable includes conductor, crosslinked polyethylene insulation layer, shielding layer and sheath layer from inside to outside.The sheath layer is prepared by soft polyvinyl chloride resin, butyronitrile rubber, silicon dioxide, silane coupling agent and epoxidized branched modified nano titanium dioxide.Epoxidized branched modified nano titanium dioxide is branched modified nano titanium dioxide by using epoxypropanol and epoxide compound containing naphthalene ring structure, and then modified by epoxidation of epichlorohydrin.Epoxidized branched modified nano titanium dioxide significantly improves the anti-UV aging performance of the cable, reduces the yellowing degree under long-term outdoor exposure conditions, so that the cable has longer service life and higher safety and reliability, and is suitable for various outdoor harsh environments.

This invention belongs to the field of epoxy resin synthesis technology, specifically relating to epoxy resin and an anhydrous epoxy resin synthesis process. The anhydrous epoxy resin synthesis process of this invention includes the following steps: dissolving bisphenol A in an organic solvent, adding sodium dithionite and mixing thoroughly, then adding solid sodium hydroxide, reacting under negative pressure and heating conditions, filtering after the reaction, adding the sodium bisphenol A solution to epichlorohydrin containing solid sodium hydroxide, and heating to carry out the resin synthesis reaction; after the reaction, performing solid-liquid separation, collecting the liquid phase and performing vacuum distillation to remove the solvent and unreacted epichlorohydrin, obtaining the epoxy resin. The anhydrous epoxy resin synthesis process provided by this invention avoids epichlorohydrin hydrolysis and is a novel epoxy resin synthesis process that is low-cost, highly efficient, and ensures excellent product color. The epoxy resin prepared by this invention guarantees product quality, with low color and low epoxy equivalent.

The application relates to the papermaking technical field, and particularly discloses a paper pulp papermaking reinforcing agent and a preparation method thereof, which comprises the following raw materials in parts by weight: polyamide epoxy chloropropane resin 10-20 parts, silicon dioxide 1-2 parts, polyvinyl alcohol 1-5 parts, crosslinking agent 0.1-1 part, deionized water 120-150 parts, modifier 0.5-2 parts, wherein the modifier contains fluorine elements, silicon elements and organic amine groups in a molecular structure, and the dry tensile property, the wet tensile property, the folding resistance, the flame resistance and the wet / dry tensile index ratio of the paper pulp reinforcing agent are improved, and the paper pulp papermaking reinforcing agent prepared by the application can be widely applied to paper strengthening and has a wide application prospect.

The application belongs to the field of functional material preparation, and particularly relates to a preparation method of a super-light high-nucleic-acid-absorption electrospun fiber sponge material and application thereof. The SiO2 electrospun fiber is used as a framework, a three-dimensional monolithic structure assembled by fragmented electrospun nanofiber membranes is used, the interconnected nanofiber cell structures of which endow the three-dimensional monolithic structure with high porosity and excellent structural flexibility and stability. Meanwhile, the amino-rich polyethylene imine and chitosan are chemically crosslinked by using epichlorohydrin as a crosslinking agent, and finally during freeze-drying, the ice crystals are partially sublimated, leaving a pore structure, and a porous sponge material is obtained. The material has a high nucleic acid adsorption capacity, and makes nucleic acid extraction more simple, rapid and sensitive.

The application provides a preparation method of a binder, the binder is prepared from modified polyacrylonitrile through a cross-linking reaction and post-treatment; the modified polyacrylonitrile is a hydrolysis product of polyacrylonitrile, and the cross-linking agent of the cross-linking reaction is epichlorohydrin. The application also provides corresponding binders, lithium ion battery negative electrodes, lithium ion batteries and electrochemical devices. The binder of the application can significantly improve the cycle stability and rate performance of the battery, and the effect is particularly significant for a silicon negative electrode with large volume expansion. The preparation process of the binder of the application has the advantages of simple operation and low cost, and is easy to realize industrial production.

The invention belongs to the technical field of building materials, and relates to impermeable high-strength concrete and a preparation method thereof. The invention provides impervious high-strength concrete which is prepared from the following components in parts by mass: 150 to 200 parts of cement, 80 to 100 parts of organic and inorganic composite modified bentonite, 900 to 1300 parts of fine aggregate, 230 to 340 parts of coarse aggregate, 2 to 10 parts of additive and 250 to 350 parts of water, the organic and inorganic composite modified bentonite is obtained by modifying bentonite with polyepichlorohydrin dimethyl ammonium and then modifying the modified bentonite with hydroxyl polyaluminum chloride. The invention aims to solve the technical problem that the compressive strength and the elastic modulus of the concrete for the underground diaphragm wall are almost synchronously reduced along with the increase of the use amount of bentonite, so that the compressive strength and the elastic modulus are difficult to consider at the same time.

The invention relates to the technical field of chemical material preparation, and particularly discloses a safe preparation method of a short fluorocarbon alkyl sulphobetaine surfactant, a product and application, and the safe preparation method comprises the following steps: (1) in a solvent system I, reacting epoxy chloropropane with secondary amine to obtain an intermediate 1; (2) in a solvent system II, reacting the intermediate 1 with sodium hydrosulfide or a hydrate thereof to obtain an intermediate 2; (3) reacting the intermediate 2 with short fluorocarbon alkyl iodide to obtain perfluoroalkyl thioether propyl tertiary amine; and (4) carrying out sulfonation treatment on perfluoroalkyl thioether propyl tertiary amine to obtain the short-fluorocarbon alkyl sulphobetaine surfactant. According to the invention, by designing a synthetic route without using a high-risk reagent, the safety and operability of the process are remarkably improved, and the sulphobetaine surfactant with excellent acid, alkali and salt chemical stability and excellent surface activity is successfully prepared; and a key material and a safe and reliable preparation process are provided for development of a new-generation efficient environment-friendly fire extinguishing agent.

This invention discloses a polyolefin-containing DCPD epoxy resin and a copper-clad laminate composition thereof, and its preparation method. The method is characterized by: polymerizing polyallyl phenol and catalyst A at high temperature to form polyallyl phenol; then reacting DCPD, polyallyl phenol, and catalyst B at high temperature to form a polyolefin-containing DCPD phenol resin; subsequently, epoxidizing the resin with epichlorohydrin and alkaline catalyst C to synthesize a polyolefin-containing DCPD epoxy resin; finally, mixing the resin with maleimide resin, phosphorus-containing phenolic resin, imidazole accelerator, inorganic filler, and solvent to obtain the polyolefin-containing DCPD epoxy resin composition for copper-clad laminates. The polyolefin-containing DCPD epoxy resin and copper-clad laminate composition prepared by this invention exhibits low dielectric constant, low dielectric loss, and high heat resistance, making it particularly suitable as a raw material for copper-clad laminates and highly practical.