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88 results about "Dimethacrylate ester" patented technology

Glycol Dimethacrylate is an organic chemical and ester of methacrylic acid. Glycol dimethacrylate is a reactive resin used as a functional monomer and a crosslinking agent in polymer production.

Anti-dazzle full-ultraviolet-proof optical protection material and preparation method thereof

The invention relates to the technical field of optical protective materials, in particular to an anti-dazzle full-ultraviolet-proof optical protective material and a preparation method thereof.The anti-dazzle full-ultraviolet-proof optical protective material is formed by sequentially compounding a scratch-resistant hardened layer, a PET film layer a, a composite adhesive layer, a PET film layer b, an installation adhesive layer and a PET release film layer from top to bottom; the preparation method comprises the following steps: mixing organic silicon modified polyurethane acrylate, a pigment, a reactive diluent, a flatting agent, a photoinitiator, a solvent and modified nano silicon dioxide to prepare a photocurable scratch-resistant hardening coating liquid; in order to endow the optical material with excellent infrared barrier property and heat insulation property, cesium tungsten bronze is introduced into a composite adhesive layer as a filler, and in order to improve the adhesive power and water resistance of a composite adhesive solution, epoxy resin is taken as a base material, organic silicon modified polyurethane acrylate is introduced as a water-resistant component, acrylic acid is taken as tackifying resin, and a curing agent is taken as a curing agent. And bisphenol A ethoxylate dimethacrylate is used as a diluent.
Owner:JIANGSU YAOSHENG NEW MATERIAL CO LTD

Preparation and application method of porous microsphere adsorbent for extracting lithium

The invention relates to the technical field of lithium adsorbents, in particular to a preparation and application method of a porous microsphere adsorbent for extracting lithium, and the preparation method comprises the following steps: preparing a water phase solution containing methacrylic acid, water and an emulsifier; the preparation method comprises the following steps: preparing an oil phase solution containing a fluorinated methacrylate monomer containing beta-diketone, cyclohexyl methacrylate, methoxyethyl methacrylate, N, N-bis (acryloyl) cystamine, ethylene glycol dimethacrylate, azodiisobutyronitrile and a solvent; dropwise adding the oil-phase solution into the water-phase solution for gradient emulsification, adding sodium persulfate to initiate polymerization, and performing centrifugal drying to obtain porous microspheres; and immersing the porous microspheres into a NaOH solution for hydrolysis activation, and drying to obtain the porous microsphere adsorbent for selective adsorption of lithium ions. Wherein the beta-diketone can enhance the targeted adsorption effect of the adsorbent on lithium ions and has relatively high selectivity and adsorption capacity, and the strong electron-withdrawing property of CF3 further polarizes carbonyl and enhances the coordination ability of the lithium ions.
Owner:常州中源技术股份有限公司

Janus conductive hydrogel with stable interface and fatigue resistance, preparation method and sensing application

The invention provides an interface-stable and anti-fatigue Janus conductive hydrogel, a preparation method and sensing application, and the preparation method comprises the following steps: uniformly mixing acrylic acid, ethylene glycol dimethacrylate, a photoinitiator, ferric chloride hexahydrate and deionized water to obtain a support layer precursor solution; mixing acrylic acid, lauryl methacrylate, N, N '-methylene bisacrylamide and the nanocellulose suspension, performing ultrasonic treatment to obtain a Pickering emulsion, adding a photoinitiator into the Pickering emulsion, and uniformly mixing to obtain an adhesion layer precursor solution; and pouring the support layer precursor solution into a mold, then slowly pouring the adhesion layer precursor solution onto the support layer precursor solution, carrying out ultraviolet curing, taking out from the mold, and cleaning to obtain the Janus conductive hydrogel. According to the method, the Pickering emulsion phase separation and the charge shielding effect are combined through a simple and convenient one-step method, and the problems that a traditional multi-layer assembly process is complex in operation and unstable in interface are effectively solved.
Owner:TIANJIN UNIV

Resin composition for optical fiber coating, colored coating material for optical fiber, optical fiber, and optical fiber ribbon

A resin composition for optical fiber coating contains a photopolymerizable compound and a photopolymerization initiator, in which the photopolymerizable compound contains a di(meth)acrylate having an oxypropylene group and a di(meth)acrylate having an oxyethylene group, and a mass ratio of a content of the oxypropylene group with respect to a content of the oxyethylene group in the photopolymerizable compound is 0.01 or more and 2.00 or less.
Owner:SUMITOMO ELECTRIC INDUSTRIES LTD

Surfactant with branched structure as well as preparation method and application of surfactant

The invention discloses a surfactant with a branched structure as well as a preparation method and application of the surfactant. The preparation method comprises the following steps: carrying out Michael addition reaction on an amphiphilic branched polymer and polyfluorinated organic amine in an organic solvent in the presence of a catalyst to obtain the surfactant with the branched structure, the amphiphilic branched polymer has a hydrophilic chain segment and a hydrophobic chain segment, and the tail end of a branched molecular chain has double bonds. The amphiphilic branched polymer is obtained by copolymerization of polyethylene glycol di (methyl) acrylate and polypropylene glycol di (methyl) acrylate through active free radicals, or is prepared by Michael addition polymerization of a di (methyl) acrylate compound and a dimercapto compound or a diamine compound in an organic solvent in the presence of a catalyst. The surfactant can quickly reduce the surface tension and prolong the retention time of pesticide liquid, and is green, environment-friendly and degradable.
Owner:NANJING TECH UNIV

Semi-solid electrolyte for lithium metal battery and preparation method of semi-solid electrolyte

The invention discloses a semi-solid electrolyte for a lithium metal battery and a preparation method of the semi-solid electrolyte, and the semi-solid electrolyte is prepared by taking polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) as a matrix, ethylene glycol dimethacrylate (EGDMA) as a monomer, N-isopropylacrylamide (NIPAM) as a cross-linking agent and azodiisobutyronitrile (AIBN) as an initiator through heating in an in-situ polymerization mode to initiate thermal polymerization. The material with good thermal stability, high-temperature working applicability and cycle reversibility is obtained, the material serves as a semi-solid electrolyte of a lithium metal battery, and under the conditions that the high temperature is 60 DEG C and the current density is 1C, a battery with lithium iron phosphate as a positive electrode circulates for 400 circles and keeps 90% of capacity; under the condition that the high temperature is 60 DEG C and the current density is 1C, the battery taking the lithium cobalt oxide as the positive electrode can circulate for 550 circles. The preparation method is simple, can be suitable for working at high temperature, and is suitable for batch production.
Owner:NINGBO UNIV

Cyclocarbonate group-containing (meth)acrylate monomer and polymer

A method of producing a polymer, including a step of subjecting a monomer mixture to radical polymerization, the monomer mixture including a cyclocarbonate group-containing (meth)acrylate monomer (A) represented by the following formula (1) and di(meth)acrylate monomer (B) represented by the following formula (2), wherein a content of the di(meth)acrylate monomer (B) is 3 weight % or lower with respect to a total of a content of the monomer (A) and the content of the monomer (B),wherein R1 represents hydrogen atom or methyl group, R2 represents an alkyl group having a number of carbons of 2 to 10, and X is 0 or 1,wherein R3 represents hydrogen atom or methyl group, R4 represents an alkyl group having a number of carbons of 2 to 10, and X is 0 or 1.
Owner:NOF CORP

Resin composition for optical fiber connection, and optical fiber ribbon

PCT designated stageWO2026034198A1Fibre mechanical structuresPolymer scienceMeth-
The present disclosure can provide: a resin composition for optical fiber connection, wherein the resin composition can form a connection part that exhibits an excellent adhesiveness and toughness; and an optical fiber ribbon having a connection part formed using this resin composition. The resin composition for optical fiber connection comprises: photopolymerizable compounds comprising a monofunctional (meth)acryloyl compound (A) and a difunctional (meth)acryloyl compound (B); and a photopolymerization initiator. The (meth)acryloyl compound (B) comprises: an epoxy di(meth)acrylate having a bisphenol A skeleton; and an ethylene oxide-modified di(meth)acrylate in which the number of ethylene oxide groups is at least 6 and not more than 28.
Owner:SUMITOMO ELECTRIC INDUSTRIES LTD

Synthesis method and application of beta-cyclodextrin aluminum citrate ion imprinting material

The invention discloses a synthesis method and application of a beta-cyclodextrin aluminum citrate ion imprinting material, and the synthesis method comprises the following steps: S1, pouring beta-cyclodextrin, citric acid and monopotassium phosphate into a bottle filled with a deionized water solution, uniformly mixing, and carrying out water bath heating reaction to synthesize a beta-cyclodextrin / citric acid precursor; s2, sequentially pouring aluminum sulfate octadecahydrate, ethylene glycol dimethacrylate and ammonium persulfate into a bottle, and performing water bath heating reaction to synthesize a crude product of a beta-cyclodextrin / aluminum citrate ionic polymer; s3, drying the crude product in the bottle; s4, washing the crude product with deionized water, filtering and drying, and grinding and modifying with ethanol; and S5, soaking in a sodium hydroxide solution, washing with deionized water until the pH value is neutral, and drying to obtain the beta-cyclodextrin / aluminum citrate ion imprinted material. The synthesis process and process are simple, and the beta-cyclodextrin is simple in source and low in cost. The mechanical strength and the acid resistance of the prepared product are greatly improved, and the prepared product has the characteristics of proper strength, stable adsorption under an acidic condition and the like.
Owner:JIANGXI UNIV OF SCI & TECH

SCF component buffer adhesive film and preparation method thereof

The present application relates to the technical field of acrylic adhesive, in particular to a SCF assembly buffer adhesive film and a preparation method thereof.The present application comprises an acrylic buffer layer and a bonding force improvement layer prepared from two modified acrylic resins, wherein the acrylic buffer layer comprises solvent, methyl acrylate, isooctyl acrylate, butyl acrylate, hydroxyethyl acrylate, azobisdimethylvaleronitrile, alpha-methyl styrene dimer, ethylene glycol dimethacrylate and 2,2-dimethoxybutane; the bonding force improvement layer comprises solvent, isooctyl acrylate, hydroxybutyl acrylate, glycidyl methacrylate, N-(isobutoxy) methacrylamide and azobisdimethylvaleronitrile; the pure adhesive film structure used in the present application can achieve the premise of the foam cushioning performance, has superior flatness, solves the poor adhesion of the foam due to the foaming process factors, and solves the poor orange peel of the display appearance.
Owner:SUZHOU SHIHUA NEW MATERIAL TECH

Zwitterionic nanogel as well as preparation method and application thereof

The invention relates to the field of postoperative adhesion medicines, in particular to zwitter-ion nanogel, a preparation method thereof and application of the zwitter-ion nanogel in preparation of postoperative adhesion medicines and secondary adhesion medicines. The preparation method of the zwitterionic nanogel comprises the following steps: preparing a polymer which is a zwitterionic monomer; a nano silicate; the crosslinking agent is ethylene glycol dimethacrylate, the catalyst is tetramethylethylenediamine, and the photoinitiator is 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy) phenyl]-1-acetone. According to the preparation method of the zwitterionic nanogel, synthesis is simple, and the nanogel prepared through the method has excellent biological activity and mechanical performance and has excellent anti-adhesion capacity. Compared with commercial anti-adhesion hydrogel, the zwitterionic nanogel prepared by the invention can safely and reliably prevent postoperative adhesion and secondary adhesion, and has great clinical potential.
Owner:ZHEJIANG CHINESE MEDICAL UNIVERSITY

Continuous preparation method of ethylene glycol dimethacrylate

The invention discloses a continuous preparation method of ethylene glycol dimethacrylate, and aims to provide a continuous preparation method of ethylene glycol dimethacrylate, which is high in reaction rate and high in product yield, and is characterized in that methacrylic acid and ethylene glycol are used as raw materials, and continuous production is realized through reactive distillation; the technical scheme comprises the following steps; the method comprises the following steps: 1, filling a reactive distillation tower with a filler, putting methacrylic acid, ethylene glycol, a polymerization inhibitor and sodium hydrogen sulfate into a feeding tank, and uniformly stirring to obtain a reaction raw material; 2, turning on a main power supply, starting a reaction control system, starting a cyclic heating device, and controlling the temperature of the rectifying column to be 100-120 DEG C; starting a circulating condensing device, and controlling the temperature of condensed water to be 0-10 DEG C; 3, starting a peristaltic pump to pump the reaction raw materials in the feeding tank into the reaction rectifying tower, starting an air pump to introduce air, collecting condensate water at the top of the rectifying tower at the beginning of reaction, and obtaining a crude ethylene glycol dimethacrylate product at the bottom of the rectifying tower; and 4, timely transferring water and methacrylic acid collected at the tower top to a tower top liquid storage tank through a pipeline, and timely transferring an ethylene glycol dimethacrylate crude product collected at a tower kettle to an ethylene glycol dimethacrylate crude product storage tank through a pipeline.
Owner:湖北宜化化工科技研发有限公司 +1

A collagen-moisturizing soft hydrophilic contact lens

This invention relates to a collagen-moisturizing soft hydrophilic contact lens, belonging to the field of contact lens technology. The collagen-moisturizing soft hydrophilic contact lens of this invention comprises the following components: hydroxyethyl methacrylate, N-vinylpyrrolidone, N,N-dimethylacrylamide, methyl acrylate, collagen, polyethylene glycol 400, polyvinylpyrrolidone K90, azobisisobutyronitrile, azodimethylvaleronitrile, benzoyl peroxide, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, and divinylbenzene. This invention solves the problems of rapid decay of moisturizing effect, poor biocompatibility, and low long-term wearing comfort of existing contact lenses through the synergistic effect of a complex hydrophilic monomer system, collagen functional components, a gradient complex initiation system, and a multi-dimensional complex cross-linking system.
Owner:GANSU KANGSHIDA TECH GRP

Luminescent material, dispersion, film, photoelectric device and method

A luminescent material comprises a perovskite crystal, a di(meth)acrylate compound of Formula 1 and an aminosilane compound or dispersant: wherein each E is independently H or CH3; each G is independently a branched or unbranched C1-C10 alkanediyl or C3-C12 cycloalkanediyl, optionally substituted with 1 to 3 L5; J is phosphate [OP(=O)(OQ')O], phosphonate [[OP(=O)(OQ1)] carbonate [OC(=O)O], sulfonate [OS(=O)2] or sulfate [OS(=O)2O]; wherein Q1 is independently selected from the group consisting of H, branched or unbranched C1-C10 alkyl or C3-C12 cycloalkyl and C2-C4 alkenyl; each L5 is independently selected from the group consisting of halogen, OH, SH, C1-C4 alkyl, C2-C4 alkenyl, or -[OCH2CH2-]nOQ2; wherein n is an integer from 1 to 10, and each Q2 is independently selected from the group consisting of H, branched or unbranched C1-C10 alkyl or C3-C12 cycloalkyl and C2-C4 alkenyl.
Owner:HELIO DISPLAY MATERIALS LTD

Anionic electrodialysis membrane and preparation method thereof

The invention belongs to the technical field of dialysis membranes, and particularly relates to an anionic electrodialysis membrane and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a polytetrafluoroethylene film with modified carbon nanotubes deposited on the surface; (2) preparing an anionic monomer; (3) uniformly mixing an anionic monomer, an anionic monofunctional monomer, ethylene glycol dimethacrylate, a monofunctional nonionic monomer, ammonium persulfate and water to obtain a mixed solution; and (4) completely soaking the polytetrafluoroethylene membrane with the modified carbon nanotubes deposited on the surface into the mixed solution at 20-30 DEG C for 2-3 hours, taking out the polytetrafluoroethylene membrane, and carrying out heating polymerization in a drying oven to obtain the anionic electrodialysis membrane. The anionic electrodialysis membrane prepared by the invention is excellent in comprehensive performance and long in service life.
Owner:TONGZHOU ZONGHENG (XIAMEN) FLUID TECH CO LTD

A water-based acrylic copolymer microsphere suspension, a preparation method thereof, and application thereof in preparing a highly light-transmitting self-matting topcoat

The present invention provides an aqueous acrylate copolymer microsphere suspension, a preparation method thereof, and an application thereof in preparing a highly light-transmitting self-matting topcoat. The aqueous acrylate copolymer microsphere suspension is prepared from styrene, methyl methacrylate, butyl acrylate, methacrylic acid, (meth)hydroxyethyl acrylate, and 1,4-butanediol dimethacrylate by microsuspension polymerization. The aqueous acrylate copolymer microsphere suspension has water absorption and water loss shrinkage properties, and the suspension has a good protective effect (such as abrasion resistance, water resistance, etc.) after film formation. The topcoat prepared using the aqueous acrylate copolymer microsphere suspension of the present invention can ensure that the coating has good light transmission performance on the basis of excellent matting performance, and has high abrasion resistance and high water resistance at the same time.
Owner:WANHUA CHEM GUANGDONG

Preparation method of PEDOT: PSS poly-ampholyte composite material

The invention belongs to the technical field of humidity-sensitive materials, and particularly relates to a preparation method of a PEDOT: PSS poly-ampholyte composite material. The preparation method comprises the following steps: preparing a hydrophilic polyampholyte by adopting an initiating chemical vapor deposition method (iCVD), and preparing the hydrophilic polyampholyte on the surface of a flexible polyimide interdigital electrode by taking dimethylaminoethyl methacrylate and methacrylic acid as hydrophilic monomers and ethylene glycol dimethacrylate as a cross-linking agent to form a polyampholyte polymer film; and then spin-coating a conductive polymer PEDOT: PSS on the surface of the film to successfully prepare the PEDOT: PSS poly-ampholyte composite material. The humidity sensor prepared from the PEDOT: PSS poly-ampholyte composite material has the advantages of high sensitivity, small lag, short recovery time and the like.
Owner:FUJIAN NORMAL UNIV

Active energy ray curable coating agent and cosmetic material using the same

To provide an active energy ray curable coating agent excellent in leveling property, abrasion resistance and matte property. [Solution] An active energy ray-curable coating agent used to form a surface protective layer of a decorative material having a substrate, a colored layer, and a surface protective layer, The active energy ray-curable coating agent comprises a (poly)alkylene glycol di(meth)acrylate (A1) having an alkylene group with 4 or more carbon atoms and / or a mono(meth)acrylate (A2) having a hydrocarbon group with 4 or more carbon atoms which may contain a heteroatom, a (meth)acrylate (B) having 3 or more functional groups, and fine particles.
Owner:TOYO INK MFG CO LTD

Laminated iron core and method for manufacturing same

Provided are: a laminated iron core in which an Fe-N-based alloy plate is used as a soft magnetic material plate, and an electrically insulating layer / interlayer insulation layer are formed and laminated while maintaining the magnetic properties of the Fe-N-based alloy plate; and a method for manufacturing the same. A laminated iron core according to the present invention is a laminated iron core in which a plurality of soft magnetic material plates are laminated with an electrically insulation layer therebetween, the laminated iron core being characterized in that: the soft magnetic material plates are Fe–N-based alloy plates containing Fe as a main component and containing a N component; the electrically insulation layer is a layer having a predetermined resin material as a matrix; and the predetermined resin material is at least one selected from an epoxy adhesive, a dimethacrylate adhesive, an acrylic adhesive, an ene–thiol adhesive, and a methacrylate ester adhesive.
Owner:HITACHI LTD +1

Silica hydrogel material as well as preparation method and application thereof

The invention discloses a silicon hydrogel material as well as a preparation method and application thereof. The preparation method comprises the following steps: curing and molding 2-hydroxyethyl methacrylate (HEMA), 3-(trimethylsiloxy) propyl methacrylate (TRIS), ethylene glycol dimethacrylate (EGDMA), a silane coupling agent and a photoinitiator through a photopolymerization reaction to obtain a silicon hydrogel substrate; performing oxygen plasma treatment; preparing a PDMS hydrophobic layer; performing oxygen plasma treatment; soaking in an organic solution containing a hydrophobic initiator; and forming a hydrophilic polymer layer. The high oxygen permeability, long-acting moisture retention, low friction and protein deposition resistance of the lens are realized by constructing a'hydrophobic water locking-hydrophilic lubrication 'double-layer functional interface.
Owner:TSINGHUA SHENZHEN INTERNATIONAL GRADUATE SCHOOL

Breathable hot melt processable medical adhesive

The article includes a substrate and a layer disposed on the substrate, the layer being at least one coated, photocrosslinked, hot-melt-processable pressure-sensitive adhesive. The adhesive is a (meth)acrylate-based copolymer that is the reaction product of a reaction mixture of a first (meth)acrylate monomer containing an alkyl, alkenyl, or aryl group having 4 to 20 carbon atoms, a second (meth)acrylate monomer containing an alkylene oxide group capped with an alkyl group, a copolymerizable reinforcing monomer, a copolymerizable photocrosslinker, and an initiator.
Owner:SOLVENTUM INTELLECTUAL PROPERTIES CO

Composition and eyeglass lens

An object of the present disclosure is to provide a composition capable of forming a layer having excellent interlayer adhesion. The composition of the present disclosure includes a polymer S of silsesquioxane having a polymerizable group; and a compound X selected from the group consisting of a monomer M and a polymer P of the monomers M, wherein the monomer M is selected from the group consisting of polyalkylene glycol di(meth)acrylate and urethane (meth)acrylate, in a molecular weight distribution curve of the polymer S obtained by gel permeation chromatography, the peak top molecular weight of the polymer S is 2800 or more, and in a molecular weight distribution curve of the polymer P obtained by gel permeation chromatography, the peak top molecular weight of the polymer P is 3500 or more.
Owner:NIKON ESSILOR

Hydrogel based on microgel enhanced non-covalent crosslinking and preparation method thereof

PendingCN120699205APolymer scienceMicrosphere
The invention relates to the technical field of high polymer materials, and particularly discloses hydrogel based on microgel reinforced non-covalent crosslinking and a preparation method of the hydrogel. The hydrogel is prepared from the following raw materials: phenylboronic acid-based microspheres, acrylamide and an initiator A; the phenylboronic acid-based microspheres are prepared from the following raw materials: ethyl 2-(2-methoxyethoxy) acrylate, methacrylic acid, ethylene glycol dimethacrylate, 3-acrylamide phenylboronic acid, an emulsifier and an initiator B; the non-covalent cross-linked hydrogel with excellent mechanical properties is prepared by taking the phenylboronic acid-based microspheres as a cross-linking agent, the mechanical properties of the non-covalent cross-linked hydrogel can be regulated and controlled by the proportion of the phenylboronic acid-based microspheres and the pH value of a system, and the prepared hydrogel realizes high tensile strength, high stretch rate and low hysteresis and has excellent fatigue resistance.
Owner:GREATER BAY AREA UNIV (IN PREPARATION)

Coating composition, UV light conversion coating and preparation method thereof, photovoltaic cell and photovoltaic module

The present invention relates to a coating composition for forming a UV light conversion coating for a photovoltaic cell, a UV light conversion coating prepared using the coating, a method for preparing the UV light conversion coating, and a photovoltaic cell and a photovoltaic module including the coating. The coating composition includes, by mass: 180-250 parts of a di(meth)acrylate component that is liquid at room temperature, which is a di(meth)acrylate of one or more aliphatic dihydroxy compounds; 66-100 parts of a mono(meth)acrylate component that is liquid at room temperature, which is a (meth)acrylate of one or more aliphatic monohydroxy compounds; 6-16 parts of a free radical initiator; 3-5 parts of a UV light converter; and 0-200 parts of an inert diluent. By using a light conversion coating prepared by the coating composition in a photovoltaic cell or a photovoltaic module, the transmittance of UV band light can be reduced and the transmittance of visible light wavelengths can be increased), thereby improving light conversion efficiency.
Owner:上海德朗聚新材料有限公司

An anion electrodialysis membrane and a method of making

The application belongs to the technical field of dialysis membranes, and particularly relates to an anion electrodialysis membrane and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a polytetrafluoroethylene membrane with surface-deposited modified carbon nanotubes; (2) preparing an anion monomer; (3) uniformly mixing the anion monomer, an anion monofunctional monomer, ethylene glycol dimethacrylate, a monofunctional nonionic monomer, ammonium persulfate and water to obtain a mixed solution; (4) completely immersing the polytetrafluoroethylene membrane with surface-deposited modified carbon nanotubes in the mixed solution, immersing at 20-30 DEG C for 2-3 h, taking out and placing in an oven for heating polymerization to obtain the anion electrodialysis membrane. The anion electrodialysis membrane prepared by the application has excellent comprehensive performance and a long service life.
Owner:TONGZHOU ZONGHENG (XIAMEN) FLUID TECH CO LTD

Soluble microneedle

The invention relates to the technical field of microneedles, in particular to a soluble microneedle. The soluble microneedle comprises a substrate and a drug-loading needle body, wherein the drug-loading needle body contains an active drug, sodium hyaluronate and trehalose; the weight-average molecular weight of the sodium hyaluronate is 150 kDa to 280 kDa; the substrate is formed by a light-cured resin monomer, a photoinitiator and a solvent, and the light-cured resin monomer comprises diurea alkane dimethacrylate and / or triethylene glycol dimethacrylate. According to the soluble microneedle, the drug-loaded matrix containing the sodium hyaluronate with the specific molecular weight is combined with the substrate made of the specific material, so that the active drug is prevented from being diffused to the substrate, the accumulative permeability is improved, meanwhile, the interface bonding strength of the drug-loaded needle body and the substrate is guaranteed, and needle breakage is reduced.
Owner:BEIJING CAS MICRONEEDLE TECH LTD

High-temperature-resistant and wind-erosion-resistant composite coal mine dust suppressant material and preparation method thereof

The invention relates to the technical field of coal mine dust suppression, in particular to a high-temperature-resistant and wind-erosion-resistant composite coal mine dust suppressant material and a preparation method thereof. The high-temperature-resistant and wind-erosion-resistant composite coal mine dust suppressant material is prepared from the following raw materials: trimethylolpropane (oxypropylene) triether, N-(3-hydroxypropyl) acrylamide, ethylene glycol dimethacrylate, a surfactant, an initiator, a humectant and water. The material aims at solving the technical problem that an existing dust suppression material is poor in film forming performance under the conditions of high temperature and wind erosion, the comprehensive effects that the excellent fluidity can still be kept even under the condition of high temperature, coal dust can be rapidly spread and wetted, and a tough and durable protective film can be formed are achieved, and tests prove that the film forming rate of the prepared material at the high temperature of 100 DEG C is 91% or above, and the material has a good application prospect. The wind erosion rate is lower than 5.5% at the wind speed of 12.8 m / s, and an efficient and reliable solution is provided for dust control of coal mines under the high-temperature condition.
Owner:SHANDONG UNIV OF SCI & TECH

Styrene-acrylic latex and waterproof coating using same

PendingCN121652329ACoatingsPolymer scienceMeth-
The invention provides a styrene-acrylic latex and a waterproof coating using the same, and the styrene-acrylic latex is prepared from the following raw materials in parts by mass: 530-600 parts of a soft monomer, 150-200 parts of a hard monomer, 15-25 parts of an amide monomer, 5-10 parts of a carboxylic acid monomer, 10-20 parts of a long carbon chain acrylate monomer and 1-5 parts of a crosslinking monomer; wherein the carbon atom number of the long-carbon-chain acrylate monomer is greater than or equal to 10; the cross-linking monomer comprises an inner cross-linking monomer or a normal-temperature self-cross-linking monomer; the internal crosslinking monomer comprises at least one of acetoacetoxy ethyl methacrylate, trimethylolpropane trimethacrylate and ethylene glycol dimethacrylate; the normal-temperature self-crosslinking monomer comprises at least one of adipic acid dihydrazide, diacetone acrylamide and ethylidene urea methacrylate.
Owner:BADFU (JIANGMEN) NEW MATERIALS CO LTD

Preparation method and application of linalool colorimetric sensor based on MIP-coated His-MOF nano enzyme

The invention discloses a preparation method and application of a linalool colorimetric sensor based on an MIP-coated His-MOF nano enzyme. The preparation method comprises the following steps: 1, dissolving histidine and terephthalic acid in a DMF (Dimethyl Formamide) solution by adopting a solvothermal method, and adding ferric chloride hexahydrate under ultrasonic stirring; then transferring the mixture into a high-pressure kettle, and reacting at 110 DEG C for 20 hours; washing and drying to obtain a His-MOF material; step 2, dispersing the His-MOF in acetonitrile, and adding linalool and methacrylic acid; pre-assembling for 30 minutes under the protection of nitrogen, adding ethylene glycol dimethacrylate and azodiisobutyronitrile, and polymerizing for 12 hours at 60 DEG C; washing the obtained product with ethanol to thoroughly remove linalool molecules, and drying for 12 hours under a vacuum condition to obtain an MIP-coated His-MOF nano enzyme; and cutting and dipping the qualitative filter paper, and airing at room temperature to obtain the portable test strip. Establishing a linear regression equation for detecting linalool and then detecting tea leaves. The method provided by the invention solves the problems of complex operation, long time consumption, poor environmental adaptability and the like in the existing linalool detection technology.
Owner:ZHEJIANG UNIV

Composition and spectacle lens

The present invention addresses the problem of providing a composition capable of forming a layer having excellent interlayer adhesion. The composition contains a polymer S of silsesquioxane having a polymerizable group and a compound X selected from the group consisting of a monomer M and a polymer P of the monomer M. The monomer M is selected from the group consisting of a polyalkylene glycol di (meth) acrylate and a urethane (meth) acrylate. The polymer S has a peak top molecular weight of 2800 or more in a molecular weight distribution curve of the polymer S obtained by gel permeation chromatography, and the polymer P has a peak top molecular weight of 3500 or more in a molecular weight distribution curve of the polymer P obtained by gel permeation chromatography.
Owner:NIKON ESSILOR