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111 results about "Butyl methacrylate" patented technology

Tackified adhesive film

The present invention relates to the technical field of tackified adhesive films and specifically to a tackified adhesive film. The tackified adhesive film comprises a substrate layer and a UV-tackified adhesive layer applied onto the substrate layer. The UV-tackified adhesive layer is prepared by using a modified polyester resin, which is obtained by the graft polymerization of a hydroxyl-terminated polyester resin, butyl methacrylate, and isocyanatoethyl methacrylate, as a main resin and mixing the main resin with a tackifying resin, a photo-curing agent and the like. The UV-tackified adhesive layer has relatively high cohesive strength and relatively good adhesion to a PET substrate. Before a UV-induced tackification reaction, an initial peel force is not significantly increased with the extension of standing time, so that an adhesive tape can be easily removed without causing damage and contamination such as residual adhesive to an adherend . After the UV-induced tackification reaction, the modified polyester resin can improve the bonding strength between the adhesive tape and the adherend.
Owner:BYE POLYMER MATERIAL CO LTD

Continuous casting high-hardness acrylic plate and preparation method thereof

The invention belongs to the technical field of acrylic plates, and particularly relates to a continuous casting high-hardness acrylic plate and a preparation method thereof.The preparation method comprises the steps that siloxane modified methacrylic acid, methyl methacrylate and n-butyl methacrylate are mixed, an azo initiator is added into the mixture, and then stirring and mixing are conducted to obtain pre-polymerized slurry; the preparation method comprises the following steps: mixing hydroxyl-terminated ether polysiloxane, isophorone diisocyanate and a catalyst dibutyltin dilaurate, reacting to obtain a macromolecular prepolymer, and then adding an end-capping reagent and a photoinitiator into the macromolecular prepolymer to obtain coating slurry; and injecting the pre-polymerized slurry between two annular steel belts which operate synchronously, coating the two annular steel belts with the coating slurry, and carrying out ultraviolet curing to obtain the high-hardness acrylic plate. Through ultraviolet curing, a high-hardness layer is formed outside the acrylic plate, polyurethane is modified by hydroxyl-terminated ether polysiloxane, the rigidity of a soft chain segment is improved by a polysiloxane chain segment, and the hardness of polyurethane is improved.
Owner:SHANDONG HONGFU OPTOELECTRONICS TECHNOLOGY CO LTD

Combined collecting agent in low-grade copper-molybdenum ore and application of combined collecting agent

PendingCN120169566AFlotationSodium acetateLime
The invention discloses a combined collecting agent in low-grade copper-molybdenum ore and application of the combined collecting agent, and belongs to the technical field of mineral separation. The method comprises the following steps: firstly, adding lime into raw ore as an inhibitor, grinding the ore, adding kerosene and butyl acrylate (or butyl methacrylate) as a combined collecting agent and a foaming agent, carrying out one-time roughing, two-time concentrating and three-time sweeping operation to obtain copper-molybdenum bulk concentrate, stirring the copper-molybdenum bulk concentrate for reagent removal, and then carrying out copper-molybdenum separation operation; sodium sulfide and sodium thioglycollate are added as inhibitors, and copper concentrate and molybdenum concentrate are obtained after one-time roughing, four-time concentrating and three-time sweeping operation; butyl acrylate (or butyl methacrylate) involved in the method has a foaming effect, kerosene and butyl acrylate (or butyl methacrylate) are used as the combined collecting agent, a foaming agent does not need to be added in the process, the ore dressing cost is reduced, and meanwhile efficient recovery of copper-molybdenum minerals is achieved.
Owner:KUNMING UNIV OF SCI & TECH

Waterproof heat-resistant mold coating and preparation method thereof

PendingCN120795707ACoatingsEpoxyMeth-
The invention provides a waterproof heat-resistant mold coating which comprises the following components: modified acrylic resin, modified silicon dioxide, epoxy resin, kaolin, talcum powder, hexagonal boron nitride, zinc stearate, graphite, a solvent and an auxiliary agent, wherein the modified acrylic resin is obtained by polymerizing acrylic acid and butyl methacrylate and then grafting 2-fluoro-5-(trifluoromethyl) benzyl alcohol and triisopropyl silanol; the modified silicon dioxide is obtained by grafting perfluorooctyl ethylene, phenyl methacrylate, hydroxyethyl methylacrylate and oleic acid after silicon dioxide and a silane coupling agent react with each other. According to the waterproof heat-resistant mold coating disclosed by the invention, a silicon-oxygen bond, a benzene ring, a long fluorine chain and an organic chain segment are introduced into the modified silicon dioxide, and the silicon-oxygen bond, the benzene ring, the fluorine chain and the organic chain segment are introduced into the modified acrylic resin, so that the heat resistance, hydrophobicity and other properties of the coating are improved, and the waterproof heat-resistant mold coating has a good application prospect.
Owner:HUNAN IND POLYTECHNIC

Interpenetrating network polymers based on phosphorylcholine polymers, methods of making and use thereof

The application belongs to the technical field of medical biomaterials, and particularly relates to an interpenetrating network polymer based on phosphorylcholine polymer and a preparation method and application thereof. The application provides a sequential interpenetrating network method, which comprises the following steps: preparing a monomer infiltration solution containing phosphorylcholine monomer, polyethylene glycol methacrylate, dimethylaminoethyl methacrylate, butyl methacrylate, hydroxyethyl methacrylate, ethylene glycol methacrylate, a crosslinking agent and an initiator; dipping a high-molecular polymer matrix into the monomer infiltration solution, and performing ultrasonic oscillation treatment to promote the infiltration of monomers into the interior of the matrix; and performing a polymerization reaction to obtain a final product after washing; the material prepared by the application has excellent thermal stability, excellent swelling performance, intelligent pH response drug release capacity and biocompatibility, and is suitable for the fields of biological medicine and cosmetics.
Owner:SHANGHAI OLI ENTERPRISES CO LTD +1

LED UV curing composition

Disclosed is an LED UV curable coating composition comprising one or more multifunctional aliphatic acrylate oligomers having an acrylate functionality of 2 or more, one or more monofunctional acrylate monomers, one or more difunctional acrylate monomers, methyl and / or butyl methacrylate, an aliphatic acrylate with primary hydroxyl groups, one or more multi-functional amino acrylates, one or more pigments, one or more photoinitiators, a methacrylate modified acidic adhesion agent, one or more UV absorbers, one or more flatteners, and one or more defoamers, and methods thereof.
Owner:ENGINEERED CUSTOM COATINGS LLC

A method for preparing a drug eluting coating and a medical device comprising the same

This invention relates to the field of medical device technology and provides a method for preparing a drug sustained-release coating and a medical device containing the same. The method includes forming a drug sustained-release coating on the surface of the medical device using a drug sustained-release polymer and a drug. The drug sustained-release polymer is a multi-component polymer containing functional groups for anti-protein adsorption, drug sustained-release, and chemical cross-linking. While ensuring the anticoagulant properties and adhesion to the surface of the medical device, the drug sustained-release coating, through the synergistic effect of butyl methacrylate and trimethoxysilyl propyl methacrylate, achieves an initial burst release of less than 20% of the total drug amount and slows down drug release to ensure a drug release cycle in vivo of no less than 21 days. This drug sustained-release coating can release a stable amount of drug to the tissue wall it contacts over a long period, aiming to achieve a long-term therapeutic or preventative effect on diseases such as luminal stenosis.
Owner:ZHUHAI TON-BRIDGE MEDICAL TECH CO LTD +1

Modified resin for MLCC (multilayer ceramic capacitor), external electrode copper paste and preparation method of external electrode copper paste

The invention discloses modified resin for MLCC, external electrode copper paste and a preparation method of the modified resin. The preparation method of the modified resin comprises the steps that ethyl cellulose serves as a raw material, ethyl cellulose with different substitution degrees and molecular weights is selected, 2-bromoisobutyryl bromide is used for esterification modification, and an EC-Br macroinitiator is prepared; the preparation method comprises the following steps: by taking EC-Br as an initiator, adding a solvent dimethylformamide into a Sureng bottle, adding monomers methyl methacrylate and butyl methacrylate, a ligand and a catalyst after the initiator is completely dissolved, and heating for polymerization reaction after three freeze-thaw cycle processes; and filtering the reaction solution with a neutral alumina column until the reaction solution is neutral, precipitating in deionized water, centrifuging, and carrying out vacuum drying until the weight is constant to obtain the modified resin EC-g-P (MMA-co-BMA). The modified resin is dissolved in an organic solvent to prepare an organic carrier, then the organic carrier is homogenized and mixed with metal copper powder and glass powder, and the external electrode copper paste with excellent rheological property and sintering property for MLCC end capping can be obtained after squeezing.
Owner:SOUTH CHINA UNIV OF TECH

Raw material mixing device capable of realizing quantitative feeding

The utility model relates to the technical field of n-butyl methacrylate production, and discloses a raw material mixing device capable of quantitatively feeding, which comprises a mixing cylinder, the upper end face of the mixing cylinder is fixedly connected with a sealing cover, a limiting mechanism is arranged in the sealing cover, the limiting mechanism comprises a moving block, a pull rod and two limiting blocks, an adjusting rod is fixedly arranged at the center of the lower end face of the moving block, first-stage limiting rods are hinged to the positions, close to the center, of the front end face and the rear end face of the outer wall of the adjusting rod correspondingly, and second-stage limiting rods are hinged to the ends, away from the adjusting rod, of the two first-stage limiting rods correspondingly. According to the feeding device, the feeding assembly can be maintained, cleaned or replaced, the feeding device is suitable for feeding tasks of feeding assemblies with different specifications or capacities, different production requirements are met, meanwhile, the stirring shaft in the device can be conveniently disassembled and maintained under the cooperation of the limiting mechanism, and the service life of the device is further prolonged.
Owner:SUZHOU HECHUANG CHEM CO LTD

Foaming adhesive tape and preparation method thereof

The invention relates to the technical field of foamed adhesive tapes, in particular to a foamed adhesive tape and a preparation method thereof. The foaming adhesive tape comprises an acrylic foaming base material, an adhesive layer coated on the surface of the acrylic foaming base material and a release film attached to the outer side of the adhesive layer, the adhesive layer is prepared from the following raw materials in parts by mass: 20 to 50 parts of butyl methacrylate, 10 to 30 parts of methyl acrylate, 5 to 15 parts of vinyl acetate, 20 to 60 parts of ethyl acetate, 5 to 10 parts of methanol, 1.1 to 3 parts of benzoyl peroxide, 5 to 15 parts of 2-hydroxypropyl acrylate, 5 to 10 parts of polystyrene microspheres, 10 to 20 parts of tetraethoxysilane, 1 to 5 parts of dopamine hydrochloride and 0.1 to 1 part of hexamethylenetetramine. 5-10 parts of hollow glass beads and 1-5 parts of a cross-linking agent. The cable is simple in structure, super-strong in impact resistance, good in thermal aging resistance and excellent in mechanical performance and stripping performance.
Owner:SHENZHEN RUNSEA ELECTRONICS CO LTD

An aqueous base glue for a polymer polyvinyl chloride film, a preparation method thereof, and an application thereof

The present invention discloses an aqueous primer for a polymer polyvinyl chloride film, a preparation method thereof, and an application thereof in a PVC wire harness tape. The aqueous primer comprises components A, B, and C. By weight, it comprises: 44-65 parts of component A, 35-56 parts of component B, and 2.7-4 parts of component C; Component A: an acrylic synthetic emulsion prepared by emulsion copolymerization of monomers such as methyl methacrylate, ethyl methacrylate, butyl methacrylate, styrene, acrylonitrile, methacrylic acid, acrylic acid, 2-ethylhexyl acrylate, butyl acrylate, isobutyl acrylate, ethyl acrylate, vinyl acetate, etc. Component B: at least one of natural rubber latex, synthetic rubber latex, and their modified latexes. Component C: an auxiliary agent. The auxiliary agent is mainly composed of a wetting agent, an antifoaming agent, etc. Compared with the current oil-based primer, the aqueous primer uses water as the main solvent, does not contain organic solvents, is environmentally friendly, and is not flammable because the main component is water, making it safer to use.
Owner:SHU GROUP CO LTD

Fluorine-free waterproof and oil-proof agent for fabric and preparation method thereof

The invention belongs to the technical field of textile chemicals, and discloses a fluoride-free waterproof and oil-proof agent for fabrics and a preparation method thereof. The fluorine-free waterproof and oil-proof agent is prepared from the following raw material components: an emulsifier, a basic monomer, a functional monomer and an initiator, the basic monomer comprises octadecyl methacrylate and / or butyl methacrylate, and the functional monomer comprises adamantyl methacrylate and triisopropyl methacrylic acid estersil. Specific functional monomers including methacrylic acid adamantyl ester and triisopropyl methacrylic acid silicone ester are introduced, so that the oil-proof performance of the fabric can be effectively improved, the waterproof and oil-proof grades can reach grade 4, and the contact angle is greater than or equal to 120 degrees; after the fabric is washed for 50 times, the waterproof grade and the oil-proof grade can still be kept at the level 3 or above; and the stable storage period under the accelerated test condition of 50 DEG C is more than 6 months.
Owner:GUANGDONG CHUANHUA FULIAN FINE CHEM CO LTD +2

A cefcapene pivoxil hydrochloride pulse formulation and a method for preparing the same

PendingCN122272530AMethacrylic acid-ethyl acrylate copolymerPolymer science
This application relates to the field of pharmaceutical formulation technology, and particularly to a cefcarditol hydrochloride pulse formulation and its preparation method. The cefcarditol hydrochloride pulse formulation of this application comprises a first particle, a second particle, and a third particle. Each particle, from the inside out, has a particle layer, an isolation layer, and a pulse layer. The pulse layer comprises a film-forming agent and an anti-adhesion agent. The film-forming agent in the first, second, and third particles sequentially comprises one or more of the following: butyl methacrylate-(2-dimethylaminoethyl) methacrylate-methyl methacrylate copolymer, methacrylate-ethyl acrylate copolymer, methacrylate-methyl acrylate copolymer, methyl acrylate-methyl methacrylate-methacrylate copolymer, and shellac. The cefcarditol hydrochloride pulse formulation of this application allows for once-daily dosing, effectively alleviating the problems of difficulty in taking cefcarditol hydrochloride tablets and poor patient compliance.
Owner:BEIMEI RESEARCH & DEVELOPMENT (SHENZHEN) CO LTD

Preparation method for and use of lithium silicate-based adsorbent

A preparation method for a lithium silicate-based adsorbent comprising mixing and stirring butyl methacrylate, an acid and an organic solvent to obtain a first solution; adding lithium silicate, an in
Owner:GUANGDONG BRUNP RECYCLING TECH CO LTD +2

Methacrylate photoresist, method of preparation and photopatterning applications

This invention relates to a class of methacrylate photoresists, their preparation method, and their photolithographic patterning applications, belonging to the fields of chemical synthesis and photolithography materials. The invention utilizes a one-step free radical copolymerization process to prepare photoresist resins from a specific molar ratio of ethyl adamantyl methacrylate, tert-butyl methacrylate, and a hexafluorovinylphenyl monomer. This method not only achieves high yield and high product purity but is also environmentally friendly, providing high-quality raw materials for subsequent processes and suitable for industrial-scale production. The photoresist resin prepared by this invention features controllable molecular weight and a narrow molecular weight distribution. Photoresists containing this polymer resin can significantly improve problems such as unclear etching boundaries and large linewidth roughness, meeting higher photolithographic requirements. The one-step reaction synthesis method and convenient post-processing of the product after the reaction are advantageous. The low cost allows for large-scale production.
Owner:DALIAN UNIV OF TECH

Method for synchronously separating ovalbumin, ovotransferrin and lysozyme from egg white

The invention discloses a method for synchronously separating ovalbumin, ovotransferrin and lysozyme from egg white, which comprises the following steps: firstly, adsorbing ovalbumin from egg white loading liquid by taking chitosan-polybutyl methacrylate nanocrystal gel with an anion exchange function as a primary separation medium, and carrying out gradient elution to obtain ovalbumin; taking a primary separation loading effluent as a secondary separation loading solution; hydroxyethyl methylacrylate-polyglycidyl methacrylate nanocrystal gel with a cation exchange function is taken as a secondary separation medium to adsorb ovotransferrin and lysozyme from a secondary separation loading solution, gradient elution is performed by gradually increasing salt concentration, and separation of ovotransferrin and lysozyme is realized. The method provided by the invention can realize synchronous separation of ovalbumin, ovotransferrin and lysozyme, has the advantages of high separation efficiency, simplicity and convenience in operation, low energy consumption and the like, and is suitable for industrial large-scale production, and the separation medium can be repeatedly used.
Owner:ZHEJIANG UNIV OF TECH

A plastic embedding method compatible with multicolor fluorescent and immunofluorescent labeling

ActiveCN119192460BPreparing sample for investigationPolymer scienceImmunofluorescent labeling
The application discloses a plastic embedding agent BMA / IBOMA resin, monomers of the resin are composed of butyl methacrylate (BMA) and isobornyl methacrylate (IBOMA) in a mass ratio of 6:1 to 7:2. The application further discloses a preparation method of the plastic embedding agent, which comprises the steps of mixing the two resins according to the mass percentage, and then adding a crosslinking agent and an initiator. The application further discloses a plastic embedding method compatible with multi-color fluorescence and immunofluorescence labeling, which adopts the BMA / IBOMA resin to embed a biological tissue sample. The embedding method has low cost, and the BMA and IBOMA are used as hydrophobic resin monomers to effectively maintain the fluorescence signal of the sample. In addition, the IBOMA can improve the cutting performance of the sample after embedding, and meet the 1-micron precision cutting requirement of the fMOST system.
Owner:HAINAN UNIV

Crosslinked HPPE Copolymer For Foam Applications

PendingUS20250257184A1SolesPolymer scienceMeth-
The present invention relates to a foam composition comprising a) a resin composition comprising a1) 25 to 100 phr of a copolymer of ethylene and alkyl (meth)acrylate, wherein the alkyl (meth)acrylate is selected from the group consisting of methyl (meth)acrylate and butyl (meth)acrylate; and a2) 0 to 75 phr of a copolymer of ethylene and vinyl acetate; and 1 to 25 phr of foam composition additives. The present invention also relates to a foam material obtainable from the foam composition, and a method of making an article comprising the foam material, as well as to a footwear article comprising the foam material.
Owner:BOREALIS AG

Cement joint sealing material for repairing high-speed rail roadbed slab cracks and preparation method of cement joint sealing material

The invention provides a cement joint sealing material for repairing high-speed rail roadbed slab cracks and a preparation method of the cement joint sealing material, and relates to the technical field of building materials. 300 parts of a modified acrylate emulsion; 0.6 to 1.2 parts of a defoaming agent; 4.5 to 5.4 parts of a water reducing agent; 0.8 to 1.2 parts of amino modified liquefied lignin; the modified acrylate emulsion is prepared from the following raw materials: a combined monomer, a functional monomer and amino modified liquefied lignin, the combined monomer is prepared from the following components in parts by mass: 3.8 to 4.2 parts of n-butyl acrylate, 3.8 to 4.2 parts of n-butyl methacrylate, 1.4 to 1.6 parts of isobutyl acrylate and 0.4 to 0.6 part of styrene; the functional monomer comprises acrylic acid. The invention provides a synthesis method of a modified acrylate emulsion copolymerized by multiple monomers, and a material meeting the requirement of repairing performance of high-speed rail roadbed slab cracks is prepared based on the emulsion and cement.
Owner:SICHUAN ZHUODING YINFENG BUILDING MATERIALS CO LTD

Water-based automobile transparent PC highlight varnish and preparation method of coating

The invention belongs to the technical field of automobile exterior trimming part coatings, and relates to a preparation method of a water-based automobile transparent PC highlight varnish and a coating thereof.The preparation method of the varnish comprises the steps that firstly, polycarbonate diol and propylene glycol monomethyl ether acetate are subjected to a primary heating reaction; then carrying out a secondary heating reaction with n-butyl methacrylate, 2-hydroxyethyl acrylate, mercaptoethanol, cyclohexyl methacrylate, methyl propylene glycol monomethyl ether and tert-butyl peroxybenzoate; adding alkali to neutralize, and mixing with water to prepare a water-based polycarbonate modified acrylic acid dispersion; then mixing with a water-based defoaming agent, a water-based flatting agent, a water-based coalescing agent, a thickening agent and an amine neutralizer to obtain a component A; mixing a water-based curing agent with a solvent to obtain a component B; and mixing the component A and the component B to obtain the water-based automobile transparent PC highlight varnish. Compared with the prior art, the invention has the advantages of high luminosity, hardness, aging resistance, excellent PC adhesive force, simple preparation process, low cost, small pollution and the like.
Owner:DONGLAI COATING TECH SHANGHAI

An oil and gas production filter aid and a process for its preparation

The application belongs to the technical field of drilling, and particularly relates to an oil and gas exploitation filter aid and a preparation process thereof. The water-absorbing and oil-absorbing double-absorption resin is prepared from soluble starch and butyl methacrylate, and is used together with calcium silicate, calcium carbonate and a compounded oil-soluble resin to prepare the oil and gas exploitation filter aid. The application has good filtration loss performance based on the high specific surface area and porous structure of calcium silicate and the synergistic effect of other components.
Owner:ORDOS MENGTAI ALUMINUM CO LTD

Hot-melting core-shell emulsion particles, preparation method thereof, treatment-free thermosensitive plate precursor containing hot-melting core-shell emulsion particles, treatment-free thermosensitive plate and application of hot-melting core-shell emulsion particles and treatment-free thermosensitive plate precursor

The invention discloses a hot-melt core-shell emulsion particle and a preparation method thereof, a treatment-free thermo-sensitive plate precursor containing the hot-melt core-shell emulsion particle, a treatment-free thermo-sensitive plate and application of the hot-melt core-shell emulsion particle and the treatment-free thermo-sensitive plate. The hot-melt core-shell emulsion particle comprises a core layer and a shell layer, and raw materials corresponding to a copolymerization unit of the core layer comprise styrene, acrylonitrile and a water-resistant reactive emulsifier; the corresponding raw materials of the shell layer copolymerization unit comprise vinyl oxetane, butyl methacrylate and a hydrophilic reactive emulsifier. The problem that the imaging capability, the on-machine developing capability and the pressrun of the treatment-free thermosensitive plate are difficult to consider at the same time is effectively solved.
Owner:LUCKY HUAGUANG GRAPHICS

Preparation method of poly (p-hydroxystyrene), poly (p-hydroxystyrene) and application

The invention discloses a preparation method of poly (p-hydroxystyrene), poly (p-hydroxystyrene) and application, and relates to the technical field of organic synthesis. According to the preparation method, 4-acetoxystyrene, 4-hydroxyphenyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate and 1-ethyl cyclopentyl methacrylate are taken as monomers, and the P (HSt-co-HADMA) copolymers with different HADMA proportions are obtained through RAFT (reversible addition-fragmentation chain transfer) polymerization. According to the copolymer, large-volume side groups are introduced, so that the glass-transition temperature of PHSt is effectively increased, the processing window of subsequent acid diffusion is improved, and the film-forming property of the copolymer is also effectively improved. Along with the increase of the HADMA content, the cracking condition of the film is improved, and the surface roughness is reduced.
Owner:JIANGSU AISEN SEMICON MATERIAL CO LTD +1

Electrolyte coatings, solid-state batteries, and power consumption devices

The present invention provides electrolyte coatings, solid-state batteries, and power consumption devices. [Solution] The electrolyte coating is applied to the surface of a solid electrolyte, which comprises one or both of a sulfide electrolyte and a halide electrolyte. The electrolyte coating is a copolymer of perfluorohexylethyl methacrylate and butyl methacrylate. The present invention significantly improves the stability in air (even at high humidity) without significantly affecting conductivity by applying the electrolyte coating to the surface of sulfide electrolytes and halide electrolytes.
Owner:AESC JAPAN LTD

Conductive composite material and preparation method thereof

The invention belongs to the technical field of conductive composite materials, and particularly relates to a hydrophobic gel conductive composite material and a preparation method thereof. In order to solve the synergistic problem of an electronic equipment protection material in the aspects of flexibility, conductivity and environmental tolerance in an extreme temperature environment, the invention provides a hydrophobic gel conductive composite material which is prepared by the following steps: uniformly mixing butyl methacrylate, short-chain alkyl alcohol with the carbon atom number of 12-16 and a carbon nanotube to obtain a precursor mixed solution; and then adding a cross-linking agent and an initiator, and carrying out in-situ polymerization reaction. The composite material disclosed by the invention has hydrophobicity, excellent stretchability and stable conductivity, keeps structural integrity in an extreme temperature range of-40 DEG C to 120 DEG C, and realizes controllability of material performance. The method is suitable for space probe flexible circuit packaging, expandable antenna protection and other scenes, and has significant engineering application value.
Owner:AVIC CHENGFEI COMML AIRCRAFT COMPANY

Pressure-sensitive adhesive compositions and related aqueous polymer dispersions

ActiveUS12716013B2Polymer scienceMeth-
A pressure sensitive adhesive comprising an aqueous polymer dispersion which comprises at least one polymer with monomeric units from a monomeric composition comprising (by weight): a) 60 to 95% of 2-ethylhexyl acrylate; b) 0.1 to 15% of butyl (meth)acrylate; c) 0.5 to 5% of a vinyl aromatic monomer; d) 0.1 to 4% of at least one ethylenically unsaturated acid; e) 0 to 20% of a vinylic ester of C2-C8 carboxylic acid; f) optionally, a monomer different from a), b), c), d) and e); g) at least 0.005% with respect to the total weight of monomers a)+b)+c)+d)+e)+f) of at least one chain transfer agent; the sum of a)+b)+c)+d)+e)+f) being equal to 100%, wherein said monomeric composition does not comprise any C1-C2 alkyl (meth)acrylate.
Owner:ARKEMA FRANCE SA

Ophthalmic polyzwitterionic nanopharmaceutical carrier, nanofomulation and use

The application belongs to the field of ophthalmic nano-preparations, and particularly relates to an ophthalmic poly-nitrogen-oxygen amphoteric nano-drug carrier, an ophthalmic nano-preparation and a use. The nano-drug carrier is prepared by using a random copolymer of 2-(N-oxide-N,N-diethylamino)ethyl methacrylate and butyl methacrylate, has an average particle size of 7-12 nm, and can be used for loading ophthalmic drugs such as cyclosporine A. Research shows that the nano-drug carrier has good corneal retention characteristics and corneal permeability, and after loading cyclosporine A, has a good relieving effect on corneal damage and local inflammation of dry eye model animals, and the safety of the nano-drug carrier is good, and the nano-drug carrier has a good application prospect.
Owner:ANHUI UNIVERSITY OF TRADITIONAL CHINESE MEDICINE

Multifunctional acrylic microgel emulsion as well as preparation method and application thereof

The invention discloses a multifunctional acrylic microgel emulsion as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The specific core layer component and the specific shell layer component are selected and have a synergistic effect, so that the anti-sagging property and the self-repairing capability of the acrylic microgel emulsion are remarkably improved; specifically, butyl methacrylate and methyl methacrylate monomers in the core layer endow the emulsion with good flexibility and cohesiveness; high glass transition temperature monomers (methyl methacrylate and styrene) of the shell layer provide higher hardness and corrosion resistance; besides, the functional monomer in the core layer and glycidyl methacrylate in the shell layer are subjected to chemical bonding reaction to form a dynamic cross-linked network structure, so that the self-repairing capability of the acrylic microgel emulsion is further improved; therefore, the multifunctional acrylic microgel emulsion has a good application prospect in coatings.
Owner:HUBEI LONGSHENG SIHAI NEW MATERIALS CO LTD +1

Preparation method of polymethacrylimide foam with high foaming ratio

The invention relates to a preparation method of polymethacrylimide foam, in particular to a preparation method of polymethacrylimide foam with high foaming ratio. The invention aims to solve the problems that the preparation process of the existing polymethacrylimide foam is complicated, the forming process window is narrow, and the polymethacrylimide foam with high foaming ratio cannot be obtained. The method comprises the following steps: 1, weighing; 2, prepolymerization; 3, polymerizing; and 4, foaming. Formamide, tert-butyl alcohol and 1-nitrile propyl-3-methylimidazolium hexafluorophosphate are used as a composite foaming agent, the foaming agent has good intersolubility with a main monomer butyl methacrylate and cannot be separated out in a prepolymerization stage and a post-polymerization stage, and the prepared copolymerization plate is uniform and transparent; the foaming ratio of the polymethacrylimide foam with the high foaming ratio prepared by the preparation method disclosed by the invention can reach 15.8 times; the compression strength can reach 1.03 MPa, and the bending strength can reach 1.82 MPa.
Owner:SHENZHEN POLYTECHNIC

Methods of forming ceramic substrates

A method of forming a ceramic substrate includes heating lithium cobaltite (LCO) precursor powder in a furnace at a furnace temperature greater than or equal to 300° C. and less than or equal to 950° C. to at least partially remove lithium from surfaces of particles of the LCO precursor powder, dispersing the LCO precursor powder in a binder and solvent to form a slurry, tape casting the slurry to form a tape, drying the tape to remove the solvent and form a green tape, debinding the green tape to remove the binder and form a brown tape, and sintering the brown tape to consolidate the LCO precursor powder and form a ceramic substrate. The binder includes poly(propylene carbonate), poly(propylene-co-cyclohexene carbonate), n-butyl methacrylate, polybutyl acrylate, poly(propylene), poly(isobutylene), poly(styrene-co-butadiene), poly(ethylene-co-vinyl acetate), poly(vinyl acetate), poly(vinyl alcohol), or combinations thereof.
Owner:CORNING INC