1961 results about "Phosphoric Acid Esters" patented technology

The invention provides a low-smoke halogen-free flame-retardant cable material and a preparation method thereof, and belongs to the field of cable materials. The low-smoke halogen-free flame-retardant cable material is prepared from the following chemical components: 32 to 40 parts of nitrile rubber, 22 to 27 parts of natural rubber, 8 to 12 parts of benzoxazole-siloxane copolymer containing phosphate dynamic bonds, 13 to 15 parts of core-shell-sheath three-stage structure flame retardant, 4 to 6 parts of hexaphenoxy cyclotriphosphazene modified carbon nanotubes, 2 to 3 parts of europium-doped mesoporous cerium dioxide and 3 to 4 parts of nano zinc oxide. The composite material is prepared from the following components in parts by weight: 3 to 4 parts of carbon nanotube grafted montmorillonite hybrid, 2 to 3 parts of lubricant, 0.8 to 1.2 parts of cross-linking agent, 0.3 to 0.4 part of accelerant, 0.4 to 0.6 part of dicumyl peroxide and 0.1 to 0.2 part of antioxidant. Unification of high flame retardance, low smoke, excellent mechanical property and processability of the cable material is realized.

The present disclosure provides methods of manufacturing psilocybin and crystalline psilocybin via a reaction of psilocin and tetrabenzylpyrophosphate in the presence of lithium chloride complex Grignard reagent, which is followed by hydrogenation. Methods of producing psilocin from 4-hydroxyindole or 4-acetoxyindole are also provided.

The invention discloses a battery monomer, a battery device and electric equipment, the battery monomer comprises an electrode assembly and an electrolyte, the electrode assembly comprises a positive pole piece, the positive pole piece comprises a positive current collector and a positive active material layer arranged on at least one side of the positive current collector, and the positive active material layer comprises lithium-containing phosphate; the electrolyte comprises a carboxylic ester solvent and a linear carbonic ester solvent, based on the total mass of the electrolyte, the mass ratio of the carboxylic ester solvent is 5%-25%, and the mass ratio of the linear carbonic ester solvent is 20%-49%; the electrolyte further comprises a non-lithium salt additive, the non-lithium salt additive comprises a phosphate ester additive, and the non-lithium salt additive further comprises at least one of a carbonate ester additive, a sulfate ester additive, a borate ester additive, a silane additive and a sultone additive. The total mass of the non-lithium salt additive accounts for 0.1%-5%.

The invention discloses a melt blending preparation process of a semiconductive shielding material for an ultrahigh-pressure crosslinked polyethylene cable, which comprises the following steps: S1, premixing low-density polyethylene and an ethylene-vinyl alcohol copolymer in proportion, the vinyl alcohol chain segment content of the ethylene-vinyl alcohol copolymer being 25%-45%; s2, performing plasma surface treatment on carbon black, and compounding the carbon black with carbon nanotubes to form a conductive filler system; s3, under the protection of inert gas, adding the matrix resin in the step S1 and the conductive filler in the step S2 into a double-screw extruder in stages, and synchronously adding a hindered phenol and phosphite compound antioxidant; and S4, carrying out segmented mixing under the temperature gradient of 160-210 DEG C. Through synergistic compounding of the plasma surface modified carbon black and the carbon nanotubes and in combination with a staged feeding process, directional dispersion of the conductive filler is realized, a three-dimensional interpenetrating conductive network is formed, and the local electric field homogenization capability of the ultrahigh-voltage cable is remarkably improved.

The invention relates to the technical field of protective glue, in particular to extreme high and low temperature impact resistant UV (ultraviolet) photocuring electronic protective glue which is prepared from the following raw materials in parts by weight: 30-50 parts of synergistically modified epoxy-urethane acrylate oligomer, 20-35 parts of composite active monomer, 1.5-5 parts of composite photoinitiator and 10-20 parts of core-shell structure inorganic composite filler, 0.6 to 2.2 parts of a silane coupling agent, 0.12 to 1.1 parts of an antioxidant and 0.11 to 1 part of a leveling agent; the preparation method of the synergistically modified epoxy-urethane acrylate oligomer comprises the following steps: reacting resin acid modified epoxy resin with phosphoric acid di (hydroxyethyl acrylate) ester at 80-90 DEG C, and introducing a phosphate group to obtain a phosphate modified epoxy acrylate intermediate; the protection glue unifies rigidity, flexibility and flame retardance on the molecular level through the cooperation of the hybrid oligomer and the core-shell filler, realizes high heat conductivity, strong adhesion and extremely low internal stress, and has extreme temperature impact resistance, long-term damp-heat aging resistance and high-reliability protection performance.

The invention relates to the field of fire-resistant oil, in particular to phosphate-based fire-resistant oil with synergistically optimized flame resistance and stability and a preparation method of the phosphate-based fire-resistant oil. The fire-resistant oil comprises base oil and an additive, the base oil is a mixture obtained by esterification of mixed alkylphenol and phosphorus oxychloride; the molar percentage of the mixed alkylphenol is as follows: 4-6% of phenol; 11 to 14 percent of p-methylphenol; 22 to 26 percent of 2, 5-position dimethyl phenol; 0.8 to 1.5 percent of 2, 4-position dimethyl phenol; 2.5 to 4 percent of 2, 3-position dimethyl phenol; 0.4 to 0.6 percent of 4-ethyl phenol; 40 to 48 percent of 3, 5-position dimethyl phenol; 8 to 11% of 3-ethyl phenol; 3 to 5 percent of 3, 4-position dimethyl phenol; the additives comprise an antioxidant, a corrosion inhibitor, an anti-foaming agent and an anti-hydrolysis agent; the addition amount of the antioxidant is 0.05-5% of the total mass of the base oil; the addition amount of the corrosion inhibitor is 0.001%-0.08% of the total mass of the base oil; the addition amount of the anti-foaming agent is 0.001%-0.009% of the total mass of the base oil; the addition amount of the anti-hydrolysis agent is 0.001%-0.005% of the total mass of the base oil. The fire-resistant oil provided by the invention can be safely used under the working conditions of high temperature and extreme pressure.

The invention relates to the technical field of high polymer materials, and particularly discloses a fluoride-free halogen-free flame-retardant polycarbonate material and a preparation method and application thereof.The fluoride-free halogen-free flame-retardant polycarbonate material is prepared from, by weight, 70-90 parts of polycarbonate resin, 8-15 parts of phosphorus-nitrogen flame retardant and 3-8 parts of silicon flame-retardant synergist, the composite material is prepared from the following raw materials in parts by weight: 20-30 parts of polypropylene, 2-5 parts of nano reinforcing filler, 0.1-0.5 part of hindered phenol antioxidant, 0.1-0.5 part of phosphite ester antioxidant and 0.1-0.5 part of pentaerythritol stearate. Through the synergistic effect of the composite flame-retardant system and the nanofiller, high flame retardance (UL94 V-0 level, 1.5 mm thickness), high heat resistance (the heat distortion temperature is greater than or equal to 130 DEG C) and excellent mechanical property are realized, the control is easy, the processing is stable, good balance of flame retardance and mechanical property is achieved on the premise of environmental protection, and the composite flame-retardant material is suitable for the fields of high-end household appliances and consumer electronics.

The invention discloses a method for separating iron and lithium in a lithium iron phosphate iron salt leaching solution and recycling iron phosphate, and belongs to the technical field of waste lithium battery recycling. The method comprises the following steps: constructing a bis (2-ethylhexyl) phosphate and trioctyl decyl tertiary amine mixed extraction system for selective extraction of Fe < 3 + >, adopting phosphoric acid for reverse extraction, recycling phosphoric acid reverse extraction liquid, preparing iron phosphate and the like. According to the method, efficient enrichment of Fe < 3 + > and efficient elution of Fe < 3 + > from a loaded organic phase are realized. The purity of the raffinate Li solution is relatively high, so that the subsequent preparation of battery-grade lithium carbonate is facilitated. The strip liquor can be recycled for multiple times, an iron intermediate is precipitated through pH adjustment, and the FePO4 product can be finally prepared through washing, aging and high-temperature calcination. The method is high in extraction selectivity, recyclable in process and mild in operation condition, has good separation effect and resource utilization efficiency, and is suitable for popularization and application of a Fe / Li separation process in lithium battery recovery.

The invention provides a hole transport layer precursor solution, a hole transport layer, a preparation method and application of the hole transport layer, and a perovskite cell, and belongs to the technical field of hole transport layers. The hole transport layer precursor solution comprises a self-assembled single molecule and an organic solvent; the organic solvent comprises a solvent A, a solvent B and a solvent C; the solvent A comprises more than one of a phosphate ester solvent and an alcohol ether solvent; the solvent A contains four hydrogen bond receptors; the boiling point of the solvent A is 215-290 DEG C; the solvent B comprises more than one of ethanol, isopropanol, normal propyl alcohol, butanol, ethylene glycol and N, N-dimethylformamide; the solvent C comprises more than one of ethyl acetate and normal hexane. A ternary hydrogen bond network is formed through the solvent A, the solvent B and the solvent C, the agglomeration degree of SAM molecules is remarkably reduced, and the device performance is improved.

The invention discloses a chiral alpha alkyl beta hydroxyl phosphate compound as well as a preparation method and application thereof, and belongs to the technical field of chemical synthesis. In the presence of a catalyst, carbonyl of a substrate is reduced into hydroxyl to obtain a chiral alcohol compound, alpha-alkyl beta-ketophosphonate is reduced by an asymmetric catalytic hydrogen transfer method, and a reduced product can be used as a core skeleton of various drug molecules, so that the chiral alcohol compound is prepared. The compound has an obvious promotion effect on migration and repair of keratinocytes, and has great application potential in the aspects of wound healing, skin tissue soothing, repair, aging resistance and the like.

To provide synthetic fibers and a synthetic fiber treatment agent capable of improving heat resistance.SOLUTION: The synthetic fiber treatment agent contains (A) the following smoothing agent, and (B) organic phosphite ester. The smoothing agent contains at least one selected from (A1) a tri-fatty acid ester of glycerin and (A2) a tri-fatty acid ester of trimethylolpropane.SELECTED DRAWING: None

The invention relates to the technical field of chemical synthesis, and particularly discloses an alpha methyl beta phosphonate compound and a synthesis method thereof.The alpha methyl beta phosphonate compound is obtained by directly oxidizing the alpha position of aryl ketone into carbon positive and combining the carbon positive with diethyl phosphite anions under the alkaline condition by using hydrogen peroxide and iodine as oxidizing agents. The alpha methyl substituted beta phosphate ester compound can be generated by a one-step method. The method is suitable for synthesizing compounds of phosphoric acid (methyl, ethyl, propyl and the like) with different alkyl substitutes (methyl, ethyl, propyl and the like) at carbonyl alpha positions. According to the method, the alpha-methyl substituted beta phosphate compound can be synthesized only by using commercial cheap and easily available aryl ketone as a raw material, using hydrogen peroxide and iodine as oxidants and using diethyl hypophosphite as a phosphine source, and reacting in the DMSO solvent at 100 DEG C for 12 hours, so that the target product can be obtained, and the yield is excellent. Compared with previously reported methods, the method does not need low-temperature operation, is simple to operate, adopts a one-pot method, does not need a metal catalyst, and all raw materials are common bulk chemicals.

The invention discloses a flame-retardant reinforced polycarbonate composite material and a preparation method thereof, and belongs to the technical field of polycarbonate composites.The flame-retardant reinforced polycarbonate composite material comprises 70%-90% of polycarbonate resin, the polycarbonate resin is aromatic polycarbonate with the viscosity average molecular weight ranging from 20000 to 35000; the glass fiber is alkali-free chopped E glass fiber, and the surface of the glass fiber is treated by an amino silane coupling agent; the flame retardant comprises 5-15% of a phosphorus-nitrogen-silicon composite flame retardant, the composite flame retardant is a synergistic system formed by physically premixing a phosphate ester compound, a nitrogen charring agent and a silicone polymer, and the phosphate ester compound plays a role in gas-phase flame retardance and partial condensed-phase flame retardance during combustion. By adopting a phosphorus-nitrogen-silicon composite flame-retardant synergistic system, high flame-retardant efficiency is realized under the condition of low additive amount, the halogen-free and environment-friendly effects are realized, and the environmental and health hidden dangers of the traditional brominated flame retardant are overcome.

The invention discloses an antistatic agent for polyolefin film material production and a preparation method thereof. According to the invention, through reasonable molecular structure design, raw material selection and synthesis process optimization, the antistatic agent has multiple functions of high-efficiency antistatic property, oxidation resistance, antibacterial property, mechanical property enhancement and the like. The polyolefin material added with the multifunctional antistatic agent has good antistatic performance under different environmental conditions, and the oxidation resistance, the antibacterial property and the mechanical property are also remarkably improved. The antistatic agent has good adaptability with processing of a polyolefin film material and has wide application prospects and market competitive advantages, and the comprehensive performance of the polyolefin film material is remarkably improved through multi-component collaborative design. The composite system of the polyolefin quaternary ammonium salt and the graphene quantum dots strengthens the long-term effect of the antistatic effect, and meanwhile, the synergistic effect of the hindered phenol and the phosphite strengthens the antioxidant stability of the material in the processing and using processes.

The invention relates to a low-smoke halogen-free flame-retardant plastic and a preparation method thereof, and belongs to the technical field of flame-retardant high polymer materials. The flame-retardant plastic is prepared from the following components: 12 to 17 weight percent of magnesium hydroxide superfine powder, 4.5 to 6.2 weight percent of modified flame retardant, 5 to 7 weight percent of flexibilizer, 0.9 to 1.2 weight percent of lubricant, 0.3 to 0.4 weight percent of antioxidant and the balance of PBT (Polybutylene Terephthalate) resin, the modified flame retardant is prepared by the following steps: reacting pentaerythritol with phosphorus oxychloride to prepare hydroxyl-containing polyhedral oligomeric phosphate, esterifying acryloyl chloride and the hydroxyl of the polyhedral oligomeric phosphate to prepare a monoester intermediate, and finally performing click addition on sulfydryl of pentaerythritol tetramercaptoacetate and double bonds of the monoester intermediate. The modified flame retardant interacts with magnesium hydroxide, a stable hollow carbon net is formed in the flame retardant process, and the hollow carbon net has a multi-layer adsorption and filtration effect on smoke particles, so that the release of smoke is reduced, and the smoke density is greatly reduced.

The present application provides a preparation method and application of an ordered mesoporous-microporous carbon composite material. The preparation method includes: (1) infiltrating a foaming material into a mixed solution containing phenolic resin, a silicon source, and a nonionic surfactant, and drying to obtain a first matrix; (2) mixing the first matrix with a phosphate compound and reacting to obtain a second matrix; (3) calcining the second matrix under an inert gas to obtain a third matrix; (4) reacting the third matrix with a hydrofluoric acid-containing solution to generate an ordered mesoporous-microporous carbon composite material. The ordered mesoporous-microporous carbon composite material prepared in the present application is corrosion-resistant, has a large specific surface area, a high porosity, good adsorption performance, and a low cost, and has excellent mechanical stability and chemical stability, and can adsorb, separate, and rapidly desorb organic pollutants in high-concentration wastewater.

The invention discloses an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking, and belongs to the technical field of refractory materials. The invention discloses an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking. The tundish magnesium-calcium dry material is prepared from the following raw materials in percentage by mass: 44-62.5% of magnesia aggregate, 22.5-24% of dolomite aggregate, 11-28% of magnesia fine powder and 3-5% of a binding agent, the binding agent is silica sol modified by a phosphate esterification aluminic acid ester coupling agent. The preparation method comprises the following specific steps: putting magnesia fine powder, a binding agent, magnesia aggregate and dolomite aggregate into a V-shaped mixing mill, uniformly stirring for 5 minutes, putting the stirred mixture into a mold, ramming, vibrating and molding to obtain a molded green body, curing at room temperature for 24 hours, demolding, drying at 200 DEG C for 24 hours, and carrying out heat treatment in an air atmosphere to obtain a dry material sample. According to the invention, the binding agent with good compatibility with a matrix is prepared by improving the binding agent, so that the binding agent can play a reinforcing role.

The present invention relates to a high antistatic crude oil type polyester FDY spinning finish and its preparation method. The composition of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate is used as the main antistatic agent, and an antistatic smoothing agent with sulfonated chitosan and PEG800 as key components is adopted. The antistatic smoothing agent and the main antistatic agent act synergistically to enhance the overall antistatic property of the finish. Preparation method: Each material is pre-equilibrated at 40°C to 50°C before feeding; then, the antistatic smoothing agent, penetrant, bundling agent, main antistatic agent, and anti-coking agent are added in sequence while stirring; finally, the temperature of the reaction kettle is controlled at 40°C to 50°C, the stirring speed is 500 to 700 r / min, and the reaction is carried out for 0.5 to 1.5 h. The present invention is a crude oil type polyester FDY finish with excellent antistatic property, and can carry out polyester FDY spinning in the way of directly applying oil with crude oil at a super high spinning speed of 4000 m / min.

The invention discloses a phosphate ester type composite binder for a sulfide battery, the phosphate ester type composite binder comprises a solute and a solvent, the solute comprises the following components in percentage by mass: 49.75%-88.5% of a binder, 9.5%-49.75% of phosphate ester and 0.45%-1.96% of silanol; the solvent is a non-polar solvent, and the mass ratio of the solute to the solvent is 1%: (10%-90%); the preparation method comprises the following steps: S1, placing the binder in a non-polar solvent, and heating and stirring until the binder is completely dissolved to obtain a solution A; s2, mixing a silane coupling agent with absolute ethyl alcohol, adjusting the pH value with acetic acid, and stirring to generate silanol; s3, silanol is added into the solution A, so that one end of silanol reacts with active hydrogen of the binder for bonding; and S4, adding phosphate into the solution A, so that the other end of the silanol is combined with a group of the phosphate to obtain a reaction solution with a binder-silanol-phosphate structure. According to the invention, stable combination of the binder and phosphate is realized through a silanol-mediated grafting structure, and the interface stability, the ionic conductivity and the mechanical strength are improved.

The invention discloses an anti-corrosion oil-resistant corrugated pipe inner layer coating and a preparation method thereof. The coating comprises acrylic acid modified epoxy resin, epoxy phosphate, an auxiliary agent, a curing agent and water. The preparation method comprises the steps of synthesis of acrylic acid modified epoxy resin, synthesis of epoxy phosphate, epoxy mixing reaction, neutralization reaction, coating preparation and the like. The preparation method comprises the following steps: adding a copolymer side chain with acrylic acid, styrene and vinyl siloxane to a side chain in epoxy resin to obtain acrylic acid modified epoxy resin, and introducing a phosphate end group to an end group of the epoxy resin to obtain epoxy phosphate; epoxy phosphate and acrylic acid are used for modifying epoxy resin, and an initiator is supplemented for secondary polymerization chain extension and cross-linking reaction, so that the obtained epoxy mixture has the curing film stability of an epoxy coating, the compact isolation effect of acrylic resin, the high adhesiveness of silicon resin to a metal surface and the phosphating treatment characteristic of phosphoric acid; and the paint has excellent water resistance, oil resistance, rust resistance and other corrosion resistance.

The present invention relates to the technical field of daily chemical technology, and specifically provides a whitening and freckle-removing cream. The freckle-removing cream comprises the following components in parts by weight: water, glycerin, mineral oil, antioxidant microcapsules, polydimethylsiloxane, sodium ascorbyl phosphate, niacinamide, a plant compound extract, essence, and cetearyl alcohol. The present invention adds natural plant extract ingredients, which is safe and effective. A circulation device is used to promote the effective combination of active ingredients, so that the active ingredients can quickly penetrate into the inner layer of the skin, thereby improving the transdermal absorption ability of the active ingredients. A unique encapsulation technology is used to firmly adhere the active ingredients to the skin surface, thereby effectively lightening facial spots, removing dullness from the skin, and restoring luster.

The invention provides an environment-friendly heat-resistant photovoltaic cable and a preparation method thereof. The environment-friendly heat-resistant photovoltaic cable comprises a conductor, an insulating layer and a sheath layer, the insulating layer is prepared from the following component raw materials: 20 to 30 percent of polylactic acid, 10 to 20 percent of polyhydroxyalkanoate, 25 to 35 percent of halogen-free flame-retardant crosslinked polyethylene, 5 to 15 percent of phosphate esterified lignin microspheres, 3 to 8 percent of quaternary ammonium salt chitosan nanofiber, 1 to 3 percent of modified graphene, 2 to 6 percent of epoxidized soybean oil, 1 to 5 percent of modified montmorillonite and 0.5 to 1.5 percent of nano silicon dioxide aerogel. The invention discloses an anti-aging agent which is prepared from the following components in percentage by weight: 2-4% of sodium alginate microcapsules, 0.5-1.5% of polydimethylsiloxane, 0.1-0.8% of a silane coupling agent and 0.1-0.8% of a plant polyphenol antioxidant. The sheath layer comprises the following raw material components: 45-55% of halogen-free flame-retardant crosslinked polyethylene, 10-20% of lignin-based carbon nanotubes, 5-15% of sulfonated chitosan / sodium alginate microspheres, 1-6% of graphene, 5-15% of epoxidized soybean oil, 2-8% of nano silicon dioxide, 1-3% of polydimethylsiloxane, 1-3% of peppermint oil microcapsules, 1-3% of a silane coupling agent and 0.1-0.8% of an antioxidant. And 0.1-0.8% of an ultraviolet light absorber. The photovoltaic cable disclosed by the invention has the advantages of flame retardance and difficulty in generating drippings after combustion.

The invention provides a high-performance concrete anticorrosive paint and a preparation method of a coating, and relates to the technical field of building materials and corrosion prevention. The coating is composed of a component A and a component B, the component A comprises epoxy resin, a composite solvent, an organic solvent, a dispersant, fumed silica and a leveling agent, and the component B comprises an epoxy hardener, a conductive polymer dispersion liquid and an organic solvent. The composite solvent is formed by compounding one or more of orthotitanate, phosphate and orthosilicate with an ester, ketone, alcohol, aromatic hydrocarbon, aliphatic hydrocarbon or ether organic solvent. The preparation method of the anticorrosive coating comprises the following steps: preparing the component A and the component B, mixing to form a coating, applying the coating to the surface of concrete, and curing. The coating is compact in structure and strong in adhesive force, can obviously improve the durability and corrosion resistance of concrete in extreme environments such as high salinity and high acid, and is particularly suitable for infrastructure protection in coastal and heavy corrosion industrial areas.

An extreme-cold resistant low-fume halogen-free flame-retardant polyolefin sheath, a preparation method therefor, and a cable. The sheath comprises the following raw materials in parts by mass: 4-16 parts of an ethylene-vinyl acetate copolymer, 7-13 parts of a phosphate group functionalized linear low-density polyethylene, 9-15 parts of an ethylene-octene copolymer, 5-10 parts of a maleic anhydride-grafted ethylene-methyl methacrylate copolymer, 10-15 parts of magnesium hydroxide, 40-50 parts of aluminum hydroxide, etc. The preparation method for the phosphate group functionalized linear low-density polyethylene comprises: adding a catalyst to a pre-cooled ethylene monomer, adding a vinyl phosphate ester and an initiator after the reaction, and reacting for 1-2 hours at a temperature of 65-75°C and a pressure of 15-35 Mpa and then terminating the reaction, thereby obtaining the phosphate group functionalized linear low-density polyethylene. Compared with unfunctionalized polyethylene, the phosphate group functionalized polyethylene used has greatly improved low-temperature and flame-retardant performance, and can improve the overall flame-retardant and low-temperature performance of the formula.

The invention discloses a synthesis process and application of a viscosity-reducing admixture for machine-made sand, and relates to the technical field of nano modification. The process comprises the following steps: preparing a nano composite dispersion: mixing nano SiO and carboxylated nano cellulose, adding polyether phosphate as a dispersing agent, and performing high-pressure homogenization treatment to prepare the stable nano composite dispersion; low-temperature gradient polymerization reaction: under the protection of nitrogen and at the low temperature of 5-10 DEG C, dropwise adding monomers in three stages to carry out polymerization reaction; and a post-treatment process: adding an organic silicon defoaming agent, and carrying out vacuum defoaming treatment to obtain a final product. The mixing amount of the admixture is only 0.2-0.5% of the mass of cement, the viscosity of the machine-made sand concrete can be remarkably reduced, the fluidity is improved, and the construction performance and the concrete quality are improved. The method is characterized in that the rheological property is optimized by utilizing a nano modification technology, a low-temperature polymerization process is adopted, and the method is energy-saving, environment-friendly and suitable for large-scale industrial production.

The invention discloses a functional intermediate for polycarboxylic acid synthesis modification and a preparation process thereof, the intermediate is a copolymer containing a phosphate group, an acrylate group and a hyperbranched polyether polyol chain segment, the molar ratio of all structural units is 1: (1-3): (0.5-2), and the preparation method comprises the following steps: esterification reaction; carrying out phosphorylation reaction; and carrying out gradient vacuum to remove small molecules. The intermediate is high in content of effective components, the viscosity is 500-2000mPa. S, the dispersing performance and the slump loss resistance of the polycarboxylate superplasticizer are remarkably improved through the synergistic effect of phosphate tackifying, acrylate dispersing and hyperbranched compatibilizing, the intermediate is particularly suitable for concrete construction under complex gravel geological conditions, the doping amount is reduced compared with that of traditional hydroxyethyl acrylate, and the service life of the polycarboxylate superplasticizer is prolonged. And the slump of the mother liquor can be kept lossless for a long time.

The invention relates to the technical field of small molecule synthesis, in particular to a method for efficiently synthesizing apoate, which comprises the following steps: S1, condensation reaction: mixing C5 phosphate and C10 dialdehyde in a molar ratio of (0.8-1.2): 1 under the protection of inert gas, and carrying out catalytic reaction for 0.5-2 hours in a solvent at-10-10 DEG C through a base catalyst to generate a C15 aldehyde intermediate; and S2, condensation reaction: mixing C15 aldehyde and C15 phosphate ester in a solvent according to a molar ratio of (0.8-1.2): 1, dropwise adding an alkali catalyst at 0 DEG C, and reacting for 1-2 hours to obtain the apoester. High-activity condensation and coupling are achieved through the catalyst, the reaction time is shortened to be within 4 hours, and the yield is larger than or equal to 85%; compared with the traditional process, the discharge amount of three wastes is reduced by 40-60%, and toxic by-products are avoided; the problems of low yield and heavy pollution in the prior art are solved, and an efficient and economical solution is provided for large-scale clean production of the apoate.

The invention discloses hydrolysis-resistant liquid phosphite ester and a preparation method and application thereof.The hydrolysis-resistant liquid phosphite ester is prepared by the steps that 2, 2, 4-trimethyl-1, 3-pentanediol and phosphorus trichloride or phosphite triester serve as raw materials, a cyclization reaction is conducted firstly, and then the hydrolysis-resistant liquid phosphite ester is obtained; and then carrying out nucleophilic substitution on Cl or aryl and alkyl on the cyclized intermediate by using higher saturated monohydric alcohol with more than C8, wherein the molecular structure is as shown in formula I in the specification. The liquid phosphite ester is novel liquid phosphite ester, the main body of the liquid phosphite ester is of a six-membered ring structure, the basic structure of the phosphite ester is reserved to the maximum extent, and the anti-oxidation effect of the phosphite ester is guaranteed; hydrophobic aliphatic chain structures on phosphorus atoms and branched chains of the phosphorus atoms prevent water molecules from approaching P-O bonds, so that the phosphorus atoms and the branched chains are prevented from being attacked by the water molecules, and the hydrolysis resistance is improved under the conditions that any additional amine hydrolysis-resistant agent is not used and any steric hindrance group is not introduced; good practical value, economic value and market prospect are realized.

This invention discloses a gypsum-based lightweight flame-retardant board and its preparation method, relating to the field of building materials technology. The gypsum-based lightweight flame-retardant board prepared by this invention is made by foaming a gypsum substrate with a foaming agent and a composite stabilizer, then introducing a self-made flame retardant and other raw materials, casting it between two layers of facing paper, and drying it. The composite stabilizer includes a modified acrylamide copolymer and acrylamide hydrogel. The modified acrylamide copolymer is obtained by copolymerizing N-isopropylacrylamide with silane acrylic acid and then reacting it with hyperbranched polyphosphate. The acrylamide hydrogel is obtained by polymerizing acrylic acid and acrylamide through an aqueous solution. The self-made flame retardant is obtained by reacting ammonium polyphosphate with a hydroxy heterocyclic amino alcohol. The hydroxy heterocyclic amino alcohol is obtained by reacting a heterocyclic amino alcohol with a double-terminated hydroxyl polyphenylene ether. This process gives the gypsum-based lightweight flame-retardant board excellent flame retardancy, mechanical properties, and flame-retardant stability.

The invention relates to the technical field of sealing elements, in particular to rubber, a preparation method of the rubber, a fully-coated rubber O-shaped ring and a preparation method and application of the fully-coated rubber O-shaped ring. The rubber provided by the invention is prepared from the following raw materials in parts by mass: 100 parts of ethylene propylene diene monomer, 30-50 parts of a reinforcing agent, 5-10 parts of a plasticizer, 1-2 parts of an antioxidant, 1-2 parts of a stabilizer, 0.8-1.2 parts of a vulcanizing agent, 0.5-1 part of an accelerant, 3-5 parts of zinc oxide, 1-1.5 parts of stearic acid, 3-6 parts of a special modification additive, 2-5 parts of a preservative and 3-5 parts of a phosphate flame retardant, the content of vinyl in the ethylene propylene diene monomer is 55 wt%-65 wt%; the vulcanizing agent comprises a bis (dithiourea) vulcanizing agent and / or zinc diethyl dithiocarbamate; the accelerant comprises tetramethyl thiuram disulfide and / or N-cyclohexyl-2-benzothiazole sulfonamide, and the accelerant comprises tetramethyl thiuram disulfide and / or N-cyclohexyl-2-benzothiazole sulfonamide. The rubber has excellent corrosion resistance against special liquid oxidants (e.g., HAP).