403 results about "Dibenzoyl Peroxide" patented technology

The invention provides a degradable environment-friendly packaging material and a preparation process thereof, and belongs to the technical field of packaging materials. The preparation method comprises the following steps: preparing the modified nano montmorillonite; preparing a composite antibacterial additive; preparing a barrier additive; and preparing the degradable environment-friendly packaging material. The preparation method comprises the following steps: by taking methacrylic acid (2-dimethylaminoethyl) ester and acrylic acid as raw materials, modifying nano-montmorillonite under the initiation of benzoyl peroxide, performing quaternary ammonium salinization, and performing in-situ synthesis of nano-zinc oxide on the surface of the quaternary ammonium salinized montmorillonite through a hydrothermal reaction to prepare the composite antibacterial additive. When the composite antibacterial additive is added into polylactic acid to prepare a packaging material, the growth of various microorganisms such as bacteria and fungi can be effectively inhibited, the packaging material is endowed with strong antibacterial protection capability, and the composite antibacterial additive has a more lasting antibacterial effect so as to prolong the antibacterial validity period of the packaging material.

The invention discloses a high-strength polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-strength polyethylene film. The high-density polyethylene composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of high-density polyethylene, 25 to 35 parts of linear low-density polyethylene, 12 to 18 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of nano silicon dioxide, 3 to 7 parts of organic montmorillonite, 1.5 to 3.5 parts of hindered amine light stabilizer, 1.5 to 2.5 parts of antioxidant 1010, 0.8 to 1.2 parts of calcium stearate, 0.8 to 1.2 parts of zinc stearate, 0.8 to 1.2 parts of silane coupling agent and 4 to 6 parts of maleic anhydride grafted polyethylene. The composite material is prepared from the following components in parts by weight: 1.5-3.5 parts of a quaternized chitosan-nano silver compound, 6-9 parts of a modified toughening agent, 4-7 parts of a modified heat-resistant agent, 1.5-3.5 parts of a processing aid, 0.15-0.35 part of dibenzoyl peroxide and 0.5-1.5 parts of a nucleating agent DBS. The composite material is excellent in comprehensive performance, high in strength, good in flexibility and puncture resistance, excellent in aging resistance, heat resistance, chemical resistance and antibacterial property, good in processability, capable of meeting the requirements of multiple fields such as packaging and agriculture, scientific in preparation method and high in practical value.

The invention discloses a neodymium iron boron composite magnet and a production process thereof, and belongs to the technical field of magnetic materials. Carrying out sand blasting and phosphoric acid treatment on the neodymium-iron-boron magnet to obtain a pretreated neodymium-iron-boron magnet; and mixing 50-60 parts of epoxy resin, 30-40 parts of polyurethane and 10-20 parts of polysiloxane, then adding 10-20 parts of a solvent, 8-16 parts of filler, 3-5 parts of an auxiliary agent and 1-3 parts of dibenzoyl peroxide, stirring to obtain a protective coating, then spraying the protective coating on the surface of the pretreated neodymium-iron-boron magnet, and curing to obtain the neodymium-iron-boron composite magnet. The auxiliary agent contains a hindered phenol structure, a benzotriazole structure and fluorine atoms, and a hybrid cross-linked network structure is formed among the auxiliary agent, the epoxy resin and the filler, so that the auxiliary agent and the filler can be highly dispersed and stably exist in the protective coating and fully play roles, and the protective coating has the advantages that the protective coating is more stable in performance due to the combined action of the other raw materials in the protective coating; the neodymium-iron-boron composite magnet has excellent and stable water resistance, aging resistance, corrosion resistance and the like.

The invention discloses a thiazolinone acrylic acid silane ester self-polishing antifouling resin and a preparation method and application of the thiazolinone acrylic acid silane ester self-polishing antifouling resin. The preparation method of the thiazolinone acrylic acid silane ester self-polishing antifouling resin mainly comprises the following steps: in a nitrogen environment, adding an initiator, the preparation method comprises the following steps: carrying out random free radical polymerization reaction on thiazolinone methacrylate, methyl methacrylate, ethyl acrylate, triisopropyl silicon-based methacrylate and phenyl dimethyl silicon-based methacrylate by taking azodiisobutyronitrile and benzoyl peroxide as initiators to synthesize the photoinitiator. Wherein the thiazolinone methacrylate monomer is prepared by grafting double bonds on 5-chloro-2-benzothiazolinone and methacryloyl chloride through a substitution reaction, then grafting hydroxyl on the 5-chloro-2-benzothiazolinone and mercaptoethanol through a mercapto-alkene click reaction and finally carrying out a substitution reaction on the 5-chloro-2-benzothiazolinone and methacryloyl chloride. According to the invention, the coating still has good surface self-renewal capability even in a static environment so as to inhibit the adhesion of large fouling organisms.

The invention discloses unsaturated polyester resin for an unmanned aerial vehicle fuselage and a preparation method of the unsaturated polyester resin, and relates to the field of high polymer materials. When the unsaturated polyester resin for the unmanned aerial vehicle fuselage is prepared, a flame-retardant monomer reacts with 2-hydroxy-5-(hydroxymethyl) benzaldehyde to prepare a modified flame-retardant monomer; reacting cellulose with acrylic acid to obtain pre-modified cellulose; the pre-modified cellulose, 1-allyl-1, 1, 3, 3-tetramethyldisiloxane and chloroplatinic acid are subjected to a reaction, and modified cellulose is prepared; maleic anhydride, 5-(1H-imidazole-1-yl)-1, 3-phthalic acid, propylene glycol and the modified flame-retardant monomer are subjected to a reaction, and pre-polyester is prepared; and stirring the pre-polyester, zinc chloride, modified cellulose, benzophenone peroxide and styrene to obtain the anti-aging coating. The prepared unsaturated polyester resin for the unmanned aerial vehicle fuselage has good anti-aging, self-repairing, flame-retardant and self-cleaning performance.

The invention relates to the field of copper-clad plates, and discloses a low-dielectric-constant high-performance copper-clad plate and a preparation method thereof.The preparation method comprises the specific steps that epoxy resin, phenolic resin, polyphenyl ether modified resin, modified nano silicon dioxide and the like are taken and mixed to obtain a resin glue solution; impregnating glass fabric in the resin glue solution to obtain a prepreg; laminating prepregs, and covering copper foil for hot pressing; the polyphenyl ether modified resin comprises epoxy resin, diallyl cyanate and fluorine-containing polyphenyl ether resin prepared by reaction of polyphenyl ether, bisphenol AF and benzoyl peroxide; the modified nano silicon dioxide is prepared by reacting allyl glycidyl ether, vinyltriethoxysilane and phenyltris (dimethylsiloxane) silane, then grafting with a phosphorus-containing intermediate to prepare a modified additive, and grafting with nano silicon dioxide, and the phosphorus-containing intermediate is prepared by reacting phenylphosphoryl dichloride and eugenol. The copper-clad plate with high flame retardance, high peel strength, heat resistance and low dielectric constant is prepared.

The invention relates to a degradable acrylic pressure-sensitive adhesive and a preparation method thereof, and belongs to the technical field of acrylic pressure-sensitive adhesives. The degradable acrylic pressure-sensitive adhesive provided by the invention is prepared from the following raw materials: polylactic acid, butyl acrylate, 2-ethylhexyl acrylate, benzoyl peroxide, ethyl acetate, temperature-sensitive microcapsules, a tackifier, an antioxidant and a stabilizer. The degradable acrylic pressure-sensitive adhesive disclosed by the invention is prepared from a plurality of components, and the polylactic acid not only endows the pressure-sensitive adhesive with good biodegradability, but also provides proper mechanical strength and flexibility; butyl acrylate and 2-ethylhexyl acrylate are combined, so that the pressure-sensitive adhesive has excellent adhesion and weather resistance; due to the introduction of the temperature-sensitive microcapsules, the tackifier, the antioxidant and the stabilizer, the performance of the pressure-sensitive adhesive is further improved, and the degradability of the pressure-sensitive adhesive is improved.

The invention relates to the technical field of ABS (Acrylonitrile Butadiene Styrene) materials, in particular to an impact-resistant composite ABS plate and a preparation method thereof. The impact-resistant composite ABS plate is prepared from the following raw materials in parts by mass: 100 to 200 parts of emulsion ABS resin, 10 to 20 parts of butadiene monomer, 5 to 10 parts of methyl methacrylate, 1 to 5 parts of glycidyl acrylate, 1 to 5 parts of maleic anhydride, 5 to 15 parts of styrene, 1 to 5 parts of aminated silicon dioxide, 0.1 to 0.5 part of benzoyl peroxide, 0.1 to 0.3 part of triethylamine, 0.1 to 1 part of emulsifier and 0.01 to 0.1 part of first initiator, 0.05-0.2 part of a second initiator, 1-3 parts of oxidized polyethlene wax, 1-2 parts of a lubricant and 1-3 parts of an antioxidant. The invention solves the contradiction between the heat resistance and impact strength of the ABS resin, has obvious advantages compared with the traditional modification system, and completely meets the application requirements of the plate in a high-temperature vibration environment.

The invention discloses an insulating material composition, a high-voltage cable, a preparation method and application. The insulating material comprises polyethylene, a peroxide cross-linking agent and an antioxidant, wherein the peroxide cross-linking agent does not contain benzoyl peroxide, and the peroxide cross-linking agent meets one or two of the following characteristics: (i) the peroxide cross-linking agent contains a reactive functional group, and the reactive functional group is selected from at least one of alkenyl, alkynyl and azido; (ii) the peroxide crosslinking agent contains at least one of a peroxide carbonyl group and a peroxide carbonate group; when the peroxide cross-linking agent contains a peroxide carbonyl group, the peroxide cross-linking agent is a non-aromatic compound. The provided insulating material composition contains the peroxide cross-linking agent adopting a specific structure, the cross-linking efficiency is improved, the long-time extrusion stability is remarkably improved, and in the long-time extrusion process, the extrusion pressure is kept stable.

The invention relates to the technical field of high polymer materials, and discloses a high-durability pressure-sensitive adhesive with low VOCs release and a preparation method thereof.The high-durability pressure-sensitive adhesive is prepared from, by weight, 50-80 parts of acrylate copolymer, 0.5-5 parts of cross-linking agent, 10-30 parts of tackifying resin, 1-10 parts of inorganic filler, 0.1-2 parts of antioxidant and 20-50 parts of solvent. Wherein the tackifying resin is at least one of hydrogenated petroleum resin and glycerol ester of rosin, and the inorganic filler is one of nanoscale silicon dioxide and calcium carbonate. Butyl acrylate is used as a main monomer, 2-ethylhexyl acrylate is used as a comonomer, acrylic acid is used as a functional monomer, benzoyl peroxide is used as an initiator, free radical polymerization is carried out at the temperature of 60-85 DEG C under the protection of nitrogen for 4-8 hours, and a copolymer chain with the molecular weight distribution index (PDI) smaller than or equal to 2.5 is formed, so that the viscosity and elasticity of colloid can be balanced; the peeling strength and the weather resistance are improved, and the colloid is prevented from being too soft or embrittled.

The invention discloses a macroporous resin material and a preparation method thereof, and macroporous resin with high specific surface area and excellent adsorption performance is obtained through a specific modified acrylate polymeric monomer and a preparation method of the macroporous resin material. The method comprises the following steps: reacting quercetin, methyl vanillate and acryloyl chloride to prepare a modified acrylate polymeric monomer, mixing the modified acrylate polymeric monomer with polyvinyl alcohol, ethylene glycol dimethacrylate, dodecanol, benzoyl peroxide and the like, and carrying out suspension polymerization to prepare the macroporous resin material. The prepared macroporous resin material has excellent performance in the aspects of pore structure, polarity and the like, can be widely applied to the related fields of adsorption separation and the like, and provides a new thought and method for research and development of the macroporous resin material.

The invention relates to a counter hot melt adhesive material with high viscosity, and belongs to the technical field of hot melt adhesives. The counter hot melt adhesive material with high viscosity provided by the invention is prepared from the following raw materials in parts by weight: 41.5 to 42.5 parts of TPU, 55.5 to 56.5 parts of EVA and 1 to 3 parts of functional aids, and the functional aids comprise POE-g-MAH, a tackifying system, nano boron nitride with the surface grafted with a silane coupling agent, an antioxidant 1076, dibenzoyl peroxide, epoxy-terminated silicone oil and white mineral oil. According to the counter hot melt adhesive material provided by the invention, all the components cooperate with one another, so that the counter hot melt adhesive material can still keep relatively high viscosity in a humid and hot environment, and the requirements of practical application are met.

The invention discloses a preparation method of ulinastatin adsorption resin, and belongs to the technical field of adsorption resin. Comprising the following steps: (1) preparing a water phase: adding pure water, gelatin, cellulose, sodium chloride and lignin into a reaction kettle until the materials are fully dissolved; (2) preparing an oil phase, wherein the oil phase contains divinylbenzene, methyl acrylate, benzoyl peroxide, tert-butyl peroxy-2-ethylhexanoate, triallyl isocyanurate, tripropanol alkyl trimethacrylate and methylbenzene, and the oil phase is uniformly stirred and mixed with the methylbenzene and the trivinylbenzene, the methyl acrylate, the benzoyl peroxide, the tert-butyl peroxy-2-ethylhexanoate, the triallyl isocyanurate, the tripropanol alkyl trimethacrylate and the methylbenzene; (3) suspension polymerization: putting the oil phase into the water phase, and carrying out staged heating reaction; (4) amination reaction; (5) alkylation reaction; and (6) acid-base alcohol treatment. Compared with the existing resin, the resin disclosed by the invention has the characteristics of high adsorption exchange rate, high desorption rate and high desorption concentration on ulinastatin, and the yield of ulinastatin is increased by 1.17 times compared with that of D215 resin.

The invention provides a preparation method of 1, 3-propane sultone, which comprises the following steps: introducing an allyl alcohol aqueous solution, a sodium hydroxide aqueous solution, sulfur dioxide and a slow-release peroxide into a continuous fluid reactor, reacting to obtain a 3-hydroxy propane sodium sulfonate crude product, acidifying the crude product to obtain 3-hydroxy propane sulfonic acid, concentrating to remove water, separating out salt by using methanol, and filtering to obtain 1, 3-propane sultone. And finally carrying out reduced pressure distillation on the filtrate to obtain 1, 3-PS. The slow-release peroxide is used for replacing conventional hydrogen peroxide or benzoyl peroxide to serve as an initiator, the preparation process conditions of the slow-release peroxide are controlled, calcium peroxide is embedded through stearic acid firstly, then surface modification polydopamine is subjected to secondary embedding, and the slow-release peroxide of a special structure is obtained; the selectivity of the 3-hydroxypropane sodium sulfonate is obviously improved while the reaction efficiency is not excessively influenced, and the method has industrial advantages.

The invention discloses an anti-radiation fabric and a preparation method thereof, and relates to the technical field of fabric preparation. When the anti-radiation fabric is prepared, bismuth powder is pre-modified with (3-chloropropyl) trimethoxysilane and then reacts with an anti-aging agent to prepare modified bismuth powder; the preparation method comprises the following steps: enabling 4-aminophenylethanol and 4-(2-ethoxyl) benzaldehyde to react to prepare a flame-retardant monomer, and then enabling the flame-retardant monomer to react with isophorone diisocyanate and 1, 4-butylene glycol to prepare polyurethane; the preparation method comprises the following steps: reacting dimethylallylamine with 1, 3-bis (chloromethyl)-1, 1, 3, 3-tetramethyldisiloxane to obtain an antibacterial cross-linking agent; the modified bismuth powder, N, N-dimethylformamide, polyurethane, an antibacterial cross-linking agent and benzoyl peroxide are mixed to prepare a polyurethane coating, the outer side surface of polyester base cloth is coated with the polyurethane coating, drying is conducted, and the anti-radiation coating fabric is prepared. The anti-radiation fabric prepared by the invention has good anti-radiation, anti-light aging, flame-retardant and antibacterial properties.

The invention discloses a degradation control agent, a refracturing controllable degradation plugging agent and a preparation method. The degradation control agent is an inclusion compound of cyclodextrin and benzoyl peroxide; the controllable degradation plugging agent for refracturing comprises the degradation control agent; the cyclodextrin molecule has an annular cavity structure, an internal cavity is non-polar, and benzoyl peroxide serving as an organic gel breaker can enter the cavity to form an inclusion compound; when a liquid rubber plug formed by the refracturing controllable degradation plugging agent is in a release medium, benzoyl peroxide molecules are released, inclusion balance is destroyed, deinclusion is carried out to carry out gel breaking degradation, and then the purpose of controllable degradation of the refracturing plugging agent is achieved by controlling the dosage of the degradation control agent.

The invention relates to the field of high-molecular materials, and provides a preparation method and application of a high-molecular degradable master batch, and the master batch is prepared from the following raw materials: maleic anhydride modified cellulose, modified starch, epoxy group-containing polymer modified polylactic acid, high-density polyethylene powder, a lubricant, a plasticizer, titanium dioxide particles and epoxidized soybean oil. The preparation method comprises the following steps: firstly, uniformly mixing a plurality of raw materials through a high-speed mixer, carrying out melt extrusion through an extruder, and then carrying out bracing, cooling, air drying, pelletizing, screening, drying and homogenizing to obtain the master batch. According to the master batch disclosed by the invention, the mechanical property, the processability, the thermal stability and the water resistance of the master batch are remarkably improved through the maleic anhydride modified cellulose, the benzoyl peroxide, the glycerol modified starch and the epoxy group-containing polymer modified polylactic acid, so that the comprehensive performance of the master batch is comprehensively optimized, and the master batch disclosed by the invention is excellent in comprehensive performance and has a wide application value.

The invention provides a PEF composite board and a preparation method, and relates to the technical field of insulation boards, the composite PEF board is formed by bonding a plurality of layers of board bodies, and comprises a base layer, the base layer is prepared from the following components in parts by weight: 58 to 60 parts of HDPE (High-Density Polyethylene), 4 to 6 parts of nano montmorillonite, 1 to 2 parts of benzoyl peroxide, 2 to 5 parts of BHT (Butylated Hydroxytoluene) heat stabilizer and antioxidant, 2 to 5 parts of maleic anhydride grafted polyethylene, 0.2 to 1 part of magnesium stearate and 0.3 to 0.8 part of epoxidized soybean oil; comprising a fireproof layer which is composed of the following components in parts by weight: 45-55 parts of HDPE and 5-15 parts of a phosphate ester environment-friendly flame retardant; comprising a thermal insulation layer and is prepared from the following components in parts by weight: 45-55 parts of HDPE, 5-10 parts of lignin fibers and 5-10 parts of a bio-based foaming agent formed by mixing sodium bicarbonate and citric acid. The invention has the beneficial effects that the mechanical strength, flame retardant property and thermal insulation effect of the PEF plate are obviously improved, the weather resistance and environmental protection property are enhanced, the optimal balance of high performance and cost effectiveness is realized, and the PEF plate is suitable for various building and industrial application environments.

The invention provides a drilling fluid flow pattern regulator suitable for Antarctic subglacial drilling and a preparation method and application thereof, and belongs to the technical field of polar region drilling. The flow pattern regulator is prepared from the following raw materials: 4-tert-butyl styrene, carboxylic acid, an acrylate monomer, oleyl alcohol, concentrated sulfuric acid and an initiator. The carboxylic acid is one of ricinoleic acid or phthalic acid; the acrylic ester monomer is one of acrylic acid-2-hydroxyethyl ester or 2-acrylic acid-2-hydroxy-3-phenoxy propyl ester, and the acrylic ester monomer is one of acrylic acid-2-hydroxyethyl ester and 2-acrylic acid-2-hydroxy-3-phenoxy propyl ester; and the initiator is one of azodiisobutyronitrile or benzoyl peroxide. The flow pattern regulator is simple in raw material composition and preparation method and low in cost. The flow pattern regulator can effectively improve the ultralow-temperature rheological property of the drilling fluid, enables the drilling fluid to have the advantages of low viscosity, high dynamic shearing force, chip carrying (ice chips and rock chips), excellent suspension performance and the like at the ultralow temperature, and is suitable for under-ice drilling in the Antarctic pole.

A plugging material is prepared from the following raw materials in terms of mass fractions, which include: 1 to 3.6 parts of PETA-modified bisphenol A epoxy resin, 1.5 to 2.4 parts of addition product of m-phenylenediamine and methacrylic acid, 0.12 to 0.17 parts of nanosilica dispersion liquid, with the remainder being water, such that the sum of the mass fractions of the aforementioned raw materials totals 100 parts. The preparation method includes: pouring a water phase mixture into a continuously stirred oil-phase mixture to form a gel-forming liquid through continued stirring; transferring the gel-forming liquid to be mixed with dibenzoyl peroxide, and stirring and reacting at a temperature of 50° C. to 120° C. to obtain the plugging material. The plugging material is resistant to high temperatures and high salinity, and exhibits strong plugging performance.

The invention relates to the technical field of anti-aging agents, and discloses a preparation method of an anti-aging agent and application of the anti-aging agent in plastics, the anti-aging agent contains styrene groups, and can be well fused and grafted with polyolefin such as polypropylene under the action of an initiator dibenzoyl peroxide or dicumyl peroxide, so that the anti-aging agent has a good anti-aging effect. The influence on the mechanical strength of the polyolefin plastic is very small, and the problem that physical blending can cause great influence on the mechanical strength and the use performance of the plastic can be avoided. Meanwhile, a phenol triazine structure contained in the anti-aging agent has a unique ultraviolet absorption effect, and a hindered amine structure is contained, so that the photo-oxygen degradation reaction of the polyolefin plastic can be inhibited through multiple ways of capturing free radicals and decomposing hydroperoxide, and through an accelerated aging experiment of xenon lamp irradiation, the plastic keeps very high tensile strength, and the anti-aging effect is good. And excellent thermo-oxidative aging resistance and ultraviolet radiation aging resistance are shown.

The invention provides a heat-conducting water-blocking sealant, a preparation method thereof and a photovoltaic module. The heat-conducting and water-blocking sealant is prepared from the following raw materials in parts by mass: 50 to 100 parts of methyl vinyl siloxane, 50 to 100 parts of lignin, 10 to 50 parts of diamond particles and / or diamond alloy particles, 0.5 to 10 parts of a first cross-linking agent, 0.5 to 10 parts of a second cross-linking agent, 0.5 to 5 parts of a coupling agent and 0.05 to 1 part of a catalyst, wherein the first cross-linking agent is prepared from one or more of dicumyl peroxide, benzoyl peroxide, toluene diisocynate and hexamethylene diisocyanate; the second cross-linking agent comprises polymethylhydrosiloxane. The heat-conducting and water-blocking sealant disclosed by the invention has relatively good heat-conducting property, water-blocking property and electrical insulation property.

The invention provides benzoyl peroxide gel and a preparation method thereof. The preparation method comprises the following steps: S1, preparing an active phase; s2, preparing a gel phase; s3, mixing half of the active phase with the gel phase, and performing constant-temperature water bath to obtain low-crosslinking-degree gel; s4, uniformly granulating the low-crosslinking-degree gel, mixing the low-crosslinking-degree gel with the balance of the active phase, and performing vacuum negative-pressure stirring twice to obtain a material; and S5, adding a pH regulator into the material, regulating the pH value, discharging and filling. Nanocrystals are formed through benzoyl peroxide pretreatment, the surface area and activity are improved, the curative effect is enhanced on the premise of safety, uniform dispersion can be achieved, the stability of benzoyl peroxide in gel is improved, and the storage time is prolonged. A part of the active phase and the gel phase are mixed to form low-crosslinking-degree gel, the low-crosslinking-degree gel is uniformly granulated and then mixed with the remaining active phase, and the benzoyl peroxide gel is prepared through vacuum negative pressure, so that the swelling property can be improved, the stability and the permeability can be improved, and adverse reactions such as irritation to skin can be avoided.

The invention provides a preparation method of high-impact MBS (methyl methacrylate-butadiene-styrene) resin with a gradient shell structure, which comprises the following steps: adding a butadiene / styrene core, methyl methacrylate, styrene and a proper amount of solvent into a reactor, uniformly mixing, heating to 110-130 DEG C, adding 20-40% of composite initiator, and carrying out polymerization reaction for 0.5-2 hours; cooling to 85-95 DEG C, adding 20-40% of a composite initiator, and continuously reacting for 0.5-2 hours; cooling to 60-70 DEG C, adding the residual composite initiator, and continuously reacting for 2-5 hours; and after the reaction is finished, carrying out post-treatment on the product to obtain the high-impact MBS resin. The composite initiator is composed of azodiisobutyronitrile and benzoyl peroxide, and the benzoyl peroxide accounts for 20-40% of the total amount of the composite initiator. The MBS resin with the gradient shell structure is prepared by adopting a step-by-step polymerization method and controlling the initiation rate, the bottleneck problem of toughness contradiction of the MBS resin with the core-shell structure is solved, and the MBS resin with high light transmittance and super toughness is obtained.

The invention relates to a method for efficiently preparing hydroxylamine hydrochloride. The method comprises the following steps: mixing a diacetylmonoxime solution and a hydrochloric acid solution, pretreating through a pressurized nano-bubble fluidized bed, and carrying out reaction distillation under heating and pressurizing; after the reaction is finished, cooling reaction liquid, performing primary filtration and suction filtration through cross-flow filtration equipment, and collecting hydroxylamine hydrochloride crystals; and washing the crystal with absolute ethyl alcohol, recovering ethyl alcohol through cross-flow filtration equipment, and finally freeze-drying to obtain the high-purity hydroxylamine hydrochloride. The preparation method comprises the following steps: stirring quinoline-8-yl acrylate, tributyltin acrylate, 4-vinyl benzocyclobutene, ethanol and benzoyl peroxide to obtain a mixed solution; immersing the PTFE membrane subjected to low-temperature plasma pretreatment into the mixed solution, and then carrying out ultrasonic cleaning and vacuum drying to obtain a polymer modified PTFE membrane; the hydroxylamine hydrochloride prepared by the method disclosed by the invention has relatively high purity and yield, and meanwhile, the content of heavy metal ions and the content of water are effectively reduced.

The invention relates to the technical field of sealants, and discloses a sealant for manufacturing a new energy automobile and a production method thereof, the sealant comprises the following raw materials: acrylic acid, butyl methacrylate, acrylamide, glycidyl acrylate, a composite tackifier, deionized water, benzoyl peroxide, a high-temperature-resistant modified component, a filler, a dispersant and a coalescing agent; wherein the structure of the composite tackifier contains an unsaturated alkenyl functional group and a catechol structure, so that the bonding strength of the sealant is effectively improved; the structure of the high-temperature-resistant modified component contains a large amount of silicon and rigid benzene ring structures, so that the prepared sealant has excellent high-temperature resistance, the service life of the sealant is prolonged, the sealing property of the sealant is maintained, and the stability and safety of the sealant under various environmental conditions are ensured.

The invention discloses an ethylene-vinyl acetate copolymer, an ethylene-vinyl alcohol copolymer and a preparation method thereof, and belongs to the field of polymers. Comprising the following steps: putting a mixture containing an initiator, a chain transfer agent, a solvent and vinyl acetate into a closed container, introducing ethylene gas, and carrying out pressurized polymerization to obtain the ethylene-vinyl acetate copolymer, the initiator is selected from at least one of lauroyl peroxide, benzoyl peroxide, azodiisobutyronitrile and azobisisoheptonitrile; the chain transfer agent is selected from the group consisting of 2-dimethylaminoethyl acetate and / or 2-dimethylaminoethyl propionate. The preparation method of the low-branching-degree EVA has the characteristics of mild conditions, strong controllability, simplicity in operation and large-scale application prospect. The invention also provides an ethylene-vinyl alcohol copolymer prepared from the prepared EVA through alcoholysis reaction, and the ethylene-vinyl alcohol copolymer has the characteristics of high molecular weight, narrow distribution, good appearance and the like, and meets the application requirements of commercial EVOH.

The invention discloses cold-resistant and tear-resistant coating resin and a preparation method thereof, and relates to the technical field of coatings. The invention discloses cold-resistant and tear-resistant coating resin. The invention relates to a water-based paint, which is prepared from the following raw materials in parts by weight: 40 to 60 parts of modified epoxy resin, 15 to 25 parts of poly (hexanediol adipate), 5 to 10 parts of modified nano silicon dioxide, 8 to 15 parts of diphenylmethane diisocyanate, 3 to 8 parts of trimethylolpropane, 10 to 20 parts of methyl methacrylate, 8 to 15 parts of butyl acrylate, 0.5 to 2 parts of benzoyl peroxide and 0.2 to 0.8 part of dibutyltin dilaurate. The invention relates to an anti-aging coating which comprises the following components in parts by weight: 20-30 parts of a silane coupling agent, 1-3 parts of a silane coupling agent KH-550, 0.3-1 part of an anti-aging agent 264, 5-12 parts of dioctyl phthalate and 20-35 parts of a mixed organic solvent. The raw materials are scientifically proportioned, and the cold resistance and tear resistance of the coating are remarkably improved through the synergistic effect of the modified epoxy resin and the modified nano silicon dioxide; water is strictly controlled in the whole process, side reaction is avoided, and stable resin structure is guaranteed; the preparation steps are clear and definite, the repeatability is high, the solvent system adaptability is good, construction is convenient and fast, and the method is suitable for base material protection in various low-temperature scenes.

A foaming cleansing composition includes 2.5% to 12.0% Benzoyl Peroxide, at least one acrylate polymer, Hyaluronic Acid, Niacinamide, a combination of anionic and amphoteric surfactants, expressly excluding alkyl polyglucosides, and water. The composition provides a unique textural feel as compared with existing benzoyl peroxide containing products, and in particular, is formulated as a light mousse-type architecture with viscosity which is retained on skin upon application and resists dripping, even in the shower. The composition is shelf stable and stable on application, demonstrating a viscosity of about 18-25 UD (Viscosity Rheomat M3 Spindle), and a pH about 5.5 to about 6.5.

The invention relates to a self-crosslinking high-temperature-resistant chloroprene rubber adhesive as well as a preparation method and application thereof. The invention relates to a self-crosslinking high-temperature-resistant chloroprene rubber adhesive. Comprising 2 to 4 parts by weight of methacrylic acid, 10 to 13 parts by weight of methyl methacrylate, 30 to 35 parts by weight of butanone, 0.4 to 0.6 part by weight of active magnesium oxide, 3 to 6 parts by weight of tert-butyl phenolic resin, 8 to 12 parts by weight of sec-butyl acetate, 12 to 15 parts by weight of chloroprene rubber, 0.1 to 0.2 part by weight of benzoyl peroxide and 24 to 28 parts by weight of toluene. The chloroprene rubber adhesive with the heat-resistant temperature of 100 DEG C or above is formed. The resin may improve characteristic adhesion and self-adhesion while increasing heat resistant cohesive strength.