43 results about "Polybutyl methacrylate" patented technology

A protective mask suited for quick regulatory approval and mass production to provide protective use of a wearer includes a mask body having a major portion forming at least one breathing opening configured for holding a filter. The mask body forms a cover contoured to cover, except for the at least one breathing opening, the wearer's mouth and nose when the mask is worn. The mask body further has a flange, wherein a length of the flange extends along a major portion of an edge of the mask body major portion, the flange being configured for pressing against the wearer's face when the mask is worn. The mask body is a material selected from the group consisting of polyethylene terephthalate, polyethylene terephthalate glycol, and poly methyl methacrylate, and combinations thereof.

The application discloses a perovskite quantum dot enhanced diffusion plate and a preparation method thereof, and relates to the technical field of optical elements. The preparation method comprises the following steps: heating and smelting inorganic glass raw materials and quantum dot precursors, quenching and cooling, tempering and crystallizing, obtaining quantum dot glass, grinding and granulating the quantum dot glass to obtain quantum dot glass powder, mixing modified polymethyl methacrylate, the quantum dot glass powder and diffusion particles, and then adding the mixture into an injection molding machine to perform extrusion, and finally obtaining the perovskite quantum dot enhanced diffusion plate. The methyl methacrylate is modified, the problem that the charge encounters great obstruction when being transmitted between the quantum dot and the methyl methacrylate is solved, and the luminous efficiency of the diffusion plate is improved.

The application discloses an up-conversion circular polarization fluorescent device of perovskite quantum dots, which comprises, from bottom to top, a light-transmitting glass substrate, a parallel orientation layer, a reflection layer, a transparent separation layer and a composite nanomaterial layer; the reflection layer is a polymer cholesteric liquid crystal layer; the transparent separation layer is made of one of polymethyl methacrylate and polyvinyl alcohol; the composite nanocrystal material layer is composed of perovskite quantum dots / up-conversion nanocrystal composite nanomaterial; the perovskite quantum dots / up-conversion nanocrystal composite nanomaterial is prepared by an in-situ synthesis method. The device has the properties of circular polarization luminescence and up-conversion circular polarization luminescence, and has excellent performances such as high stability, high energy transfer efficiency, high radiation intensity and good repeatability.

The application provides a kind of poly (methyl methacrylate) and polyethylene glycol blend asymmetric nanofiltration membrane and application, the poly (methyl methacrylate) and polyethylene glycol blend asymmetric nanofiltration membrane, poly (methyl methacrylate) (PMMA) and polyethylene glycol (PEG) two polymers are stirred and dissolved in N, N-dimethylformamide solvent to form casting solution, the nanofiltration membrane of specific thickness is prepared by doctor blade, then, the prepared nanofiltration membrane is placed in fume hood and stands, based on the different solvent evaporation rates of upper layer and bottom of nanofiltration membrane, form a blend asymmetric nanofiltration membrane with dense structure, immerse the blend asymmetric nanofiltration membrane in deionized water, remove the solvent by phase transfer method, and then solidify the membrane; in the process of membrane preparation, poly (methyl methacrylate) is the main support material, polyethylene glycol is the pore former and hydrophilic material, and the membrane realizes efficient separation and removal of neutral chlorophenol disinfection by-products with molecular weight ≤200 in water.

The application provides a kind of nanometer crack-based underwater acoustic sensor and its preparation method, belongs to hydrophone technical field.The method first, in the flexible polymer surface deposition a layer of metal film, spin coating a layer of photoresist on the metal film surface of flexible polymer, photoresist and metal film patterning;Second, the photoresist on the metal film is again patterned;Third, the flexible polymer and metal film are bent to produce nanometer crack on the metal film;Finally, the flexible polymer, polymethyl methacrylate, glass sheet are bonded, and after injecting pure water in the cavity, it is sealed to obtain underwater acoustic sensor.The nanometer crack-based underwater acoustic sensor manufactured by the application has ultra-high sensitivity, by bonding the nanometer crack sensing unit with ultra-high sensitivity and flexibility on the substrate with cavity, the ultra-sensitive detection of low-frequency underwater acoustic can be realized, and the detection range of the underwater acoustic sensor is improved.

The application provides monodisperse polymethyl methacrylate surface modified microspheres and a preparation method thereof, and belongs to the technical field of microsphere modification. The preparation method comprises the following steps: ultrasonic dispersion is performed on monodisperse polymethyl methacrylate microspheres and an organic solvent to obtain pretreated polymethyl methacrylate microsphere suspension; the pretreated polymethyl methacrylate microsphere suspension, a modifier and a catalyst are reacted to obtain monodisperse polymethyl methacrylate surface modified microspheres. The method can effectively maintain the uniform particle size advantage of the monodisperse PMMA microspheres; the modification uniformity is good, the functional group is controllable; the performance of the microsphere body is not damaged; the surface activity of the modified monodisperse PMMA microspheres is significantly improved, and the dispersibility and compatibility are greatly improved.

The present application relates to the technical field of lens mask, especially to a highway LED transparent lens mask and a preparation method thereof, which comprises the following components by weight: 80-90 parts of poly(methyl methacrylate)-b-poly(glycidyl methacrylate) block copolymer (PMMA-b-PGMA); 0.5-2.0 parts of nano-scale cerium-doped zinc oxide (Ce-ZnO) quantum dots; 5-10 parts of random ethylene-methyl acrylate-glycidyl methacrylate terpolymer; 1-3 parts of photochromic spiropyran derivative modified silica nanoparticles; and 1-3 parts of hyperbranched fluorinated polyether. The high light transmittance is ensured, and the active sites are provided through the PGMA block, which is conducive to the uniform dispersion and chemical bonding of other functional components. The nano-scale cerium-doped zinc oxide (Ce-ZnO) quantum dots are introduced to realize efficient ultraviolet blocking and light stability.

This invention relates to the field of polymer molding technology, specifically to a high-temperature resistant, dimensionally stable acrylic sheet and its preparation and shaping process, comprising the following components: 80-95 parts by weight of polymethyl methacrylate matrix resin, 5-20 parts by weight of isoborneol methacrylate, 2-6 parts by weight of nano-silica, 0.4-1.2 parts by weight of silane coupling agent, 0.2-0.6 parts by weight of initiator, 0.5-1.5 parts by weight of crosslinking agent, 0.1-0.4 parts by weight of antioxidant, 0.1-0.3 parts by weight of light stabilizer, and 0.05-0.2 parts by weight of release agent. By introducing isoborneol methacrylate as a comonomer into the polymethyl methacrylate matrix, the glass transition temperature of the polymer is significantly increased by utilizing the cyclic rigid groups in its molecular structure. Combined with the reinforcing effect of nano-silica, the high-temperature resistance of the acrylic sheet is significantly improved, with a heat distortion temperature and Vicat softening temperature significantly higher than those of ordinary acrylic sheets.

The utility model relates to the technical field of polymethyl methacrylate production discloses a reaction kettle for polymethyl methacrylate production, including base, the base upper surface is installed with the reaction kettle body, the reaction kettle body includes the inner kettle body and the outer kettle body, the inner kettle body with the outer kettle body between constitute sandwich, the sandwich is around and is equipped with circulating pipeline, the circulating pipeline is filled with synthetic type heat conducting oil, the both ends of circulating pipeline are connected with refrigerator and heating machine in common, the drive motor is fixed on the outer kettle body upper surface, the free end of drive motor output shaft is connected with the stirring shaft that presents hollow structure, the stirring shaft passes the sandwich and extends to the inner kettle body bottom, the reaction kettle body top is equipped with the feed inlet and the exhaust pipe, the reaction kettle body bottom is equipped with the discharge gate. The utility model solves the technical problem that the existing reaction kettle can not realize accurate temperature control, efficient stirring and risk prevention and control simultaneously.

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.

The present invention relates to a process for preparing a purified methyl methacrylate composition from a crude composition containing methyl methacrylate, comprising the steps of: a) providing a pyrolysis composition obtained by pyrolysis of a polymethyl methacrylate composition as a crude composition, b) subjecting the pyrolyzed composition to at least one distillation step in order to obtain a methyl methacrylate-rich composition, and c) then subjecting the methyl methacrylate-rich composition to at least one melt crystallization step in order to obtain a purified methyl methacrylate composition.

Electrochemical cells employing liquefied gas electrolytes may experience degradation of certain polymer components, such as tapes made from poly(ethylene terephthalate), poly(butylene terephthalate), or polydimethylsiloxane. These materials exhibit low chemical stability, potentially leading to cell failure. Embodiments disclosed herein utilize stable polymers, including polyimide, polypropylene, or polyethylene as tape carriers and poly(methyl methacrylate) as adhesives, to enhance compatibility and performance in such cells.

The application discloses a high-temperature-resistant organic fluorescent powder and a preparation method thereof. The organic fluorescent powder comprises a fluorescent seed formed by a poly-methyl methacrylate (PMMA) coated Sm 0.4 Yb 0.2 Er 0.4 (HTTA)3Phen fluorescent material, and a silica aerogel layer coated on the surface of the fluorescent seed. In the preparation, the organic fluorescent seed is prepared first, then the fluorescent seed is introduced in the preparation of the silica aerogel, and finally the high-temperature-resistant organic fluorescent powder with a core-shell structure is synthesized. The high-temperature-resistant light conversion powder can not only realize up-conversion and down-conversion, but also can improve the high-temperature resistance and optical performance of the light conversion powder, reduce light loss, improve mechanical performance, and adapt to the preparation mode of downstream products such as high-temperature extrusion.

Electrochemical cells employing liquefied gas electrolytes may experience degradation of certain polymer components, such as tapes made from polyethylene terephthalate), poly(butylene terephthalate), or poly dimethyl siloxane. These materials exhibit low chemical stability, potentially leading to cell failure. Embodiments disclosed herein utilize stable polymers, including polyimide, polypropylene, or polyethylene as tape carriers and poly(methyl methacrylate) as adhesives, to enhance compatibility and performance in such cells.

Thermoplastic compositions, methods of making the compositions, and composites including the compositions are described. The thermoplastic compositions can contain 55 wt. % to 85 wt. % of a poly(methyl methacrylate) (PMMA) or copolymers thereof, 2 wt. % to 25 wt. % of a poly(carbonate-siloxane) copolymer having a siloxane content of 30 wt. % to 50 wt. %, and an acrylic copolymer based impact modifier.

The invention discloses a manufacturing and forming method of a liquid crystal display screen backlight plate containing an LED light bar, and relates to the technical field of liquid crystal display screens, and the manufacturing and forming method comprises the following steps: selecting a polymethyl methacrylate and polycarbonate blending material to manufacture a light guide plate; compounding a metal reflecting layer with a preset pattern on the bottom surface of the light guide plate through a hot press molding process; a groove with a trapezoidal section is reserved along the edge of the light guide plate, a graphene conductive coating is arranged at the bottom of the groove, and meanwhile, an LED light bar assembly with heat dissipation fins is embedded; filling a gap between the light bar and the groove with a nano-particle doped ultraviolet curing adhesive to form an optical diffusion layer; and a backlight plate main body structure is formed at a time through an in-mold cutting process. Through the technical improvements of light guide plate material optimization, metal reflecting layer structure improvement, LED light bar installation mode innovation, filling material upgrading, optical compensation algorithm introduction, in-mold cutting process application and the like, the brightness uniformity, the heat dissipation performance and the installation efficiency of the backlight plate are remarkably improved, and the service life of the backlight plate is remarkably prolonged.

A composition comprising specific amounts of a poly (methyl methacrylate), a poly (carbonate-siloxane), an acrylic impact modifier, a polyethylene, and a siloxane-containing anti-scratch additive. The composition can exhibit a desirable combination of good mechanical properties and scratch resistance. Methods of making the compositions and articles comprising the compositions are also disclosed.

The present invention relates to a poly(methyl methacrylate) composition and its use, which comprises 85 to 98 wt. % of poly(methyl methacrylate) having a loss factor tan δ of at least 10, relative to the weight of the composition, and 2 to 15 wt. % of a copolymer comprising polyamide blocks and polyether blocks, relative to the weight of the composition.

The present invention relates to a poly(methyl methacrylate) (PMMA) based bone cement composition comprising a softener and the use of said bone cement composition in discoplasty procedures. The use is characterized by injection of the composition into a disc, hence stabilizing the intravertebral disc, reducing lower back pain and increasing life quality in the affected subject.

The application discloses a waste liquid treatment system, which comprises a serpentine flow guide pipe, a plurality of reaction mechanisms arranged on the top of the serpentine flow guide pipe, a plurality of light collecting mechanisms arranged on the two sides of the serpentine flow guide pipe, and the serpentine flow guide pipe is a transparent organic glass serpentine pipeline with polymethyl methacrylate as a component, the reaction mechanism comprises a storage tank, a catalyst arranged in the storage tank, and a plurality of connecting pipes arranged on the circumferential outer wall of the storage tank. Since the serpentine flow guide pipe is a transparent circular pipeline, when the pipeline is irradiated by sunlight, the transparent organic glass material can make the sunlight penetrate and generate a greenhouse effect in the serpentine flow guide pipe, so that the temperature in the pipeline is increased, the ultraviolet rays in the sunlight can have a sterilization and disinfection effect, so that the sunlight irradiated on the pipeline can help reduce the microorganisms in the wastewater, and under the action of the sunlight, the surface of the organic glass pipeline can generate a photocatalysis effect, which can help degrade the organic matters in the wastewater.

The present invention relates to a bone cement for the use in a method for reducing the occurrence of vertebral fractures following vertebral augmentation therapy. The method is characterized by injecting a poly(methyl methacrylate) (PMMA)-based bone cement comprising a bone cement softener into at least one vertebra of a subject in need 5 thereof. The method maintains vertebral height and is especially suitable for the reduction of adjacent vertebral fractures in an osteoporotic spine.

Electrochemical cells employing liquefied gas electrolytes may experience degradation of certain polymer components, such as tapes made from poly(ethylene terephthalate), poly(butylene terephthalate), or polydimethylsiloxane. These materials exhibit low chemical stability, potentially leading to cell failure. Embodiments disclosed herein utilize stable polymers, including polyimide, polypropylene, or polyethylene as tape carriers and poly(methyl methacrylate) as adhesives, to enhance compatibility and performance in such cells.

The invention discloses a PMMA (polymethyl methacrylate) polymer film-based adjustable methylbenzene QCM (quartz crystal microbalance) gas sensor as well as a preparation method and application thereof. Spin-coating polymethyl methacrylate (PMMA) on the silicon wafer, and heating and curing; putting the silicon wafer into an inductively coupled plasma etching cavity, and treating the cross-linked surface PMMA by using Ar or CF4; spin-coating polyvinyl alcohol (PVA), and heating and curing; putting the silicon wafer into acetone to dissolve PMMA at the bottom; the silicon wafer and the QCM are immersed in isopropanol, and a floating film is reversed and transferred to the QCM; placing the QCM on a heating table to dry the QCM to obtain a QCM sheet loaded with the VOCs gas-sensitive film; and placing the obtained QCM on a detection circuit. The methylbenzene gas-sensitive film with the thickness within 10 nm is prepared for the first time, the response time of a methylbenzene QCM sensor is as low as 3 s, the detection limit reaches 492 ppb, the methylbenzene gas-sensitive film belongs to an ultrathin and ultrafast response methylbenzene QCM sensor, and the methylbenzene gas-sensitive film has important significance on fast detection of extremely-low-concentration methylbenzene in actual production.

A triple-layer gas diffusion layer (GDL) for proton exchange membrane (PEM) fuel cells comprises a macroporous substrate (MPS) made from multi-walled carbon nanotubes, polymethyl methacrylate as a pore-forming agent, and polytetrafluoroethylene as a binder, a first microporous layer (MPL) with carbon nanotubes and a hydrophobic binder, and a second MPL formed by electrochemical deposition of polyaniline. The MPS is fabricated by vacuum filtration of a suspension, followed by heat treatment to enhance porosity. The first MPL is deposited on the MPS, and the second MPL is added via a three-electrode system. This GDL is integrated into a membrane-electrode assembly with a treated membrane and platinum-on-carbon electrodes. The invention simplifies fuel cell design by managing water effectively across varying humidity levels, offering utility in energy applications.

The application belongs to the technical field of polymer material preparation, relates to the field of organic glass research, and discloses a methyl methacrylate terpolymer as well as a preparation method and application thereof. The methyl methacrylate terpolymer contains structural unit I as shown in formula (1), structural unit II as shown in formula (2) and structural unit III as shown in formula (3), wherein R and R' in formula (3) are the same or different, and each is C4-C 10 alkyl. The application introduces two specific functional structural units into the macromolecular chain of polymethyl methacrylate, and prepares a novel methyl methacrylate terpolymer. The novel methyl methacrylate terpolymer has more excellent light transmission performance and heat resistance, and has high impact strength and good light transmission.

This invention discloses a fire-extinguishing microcapsule-filled polyvinylidene fluoride (PVDF) polymer solid electrolyte and its preparation method. First, a flame retardant is encapsulated via emulsion polymerization to form a fire-extinguishing microcapsule with the flame retardant core and polymethyl methacrylate (PMMA) as the shell. Then, a solution casting coating-drying process is used to uniformly fill the fire-extinguishing microcapsule into a PVDF electrolyte matrix to obtain the solid electrolyte. The introduction of the fire-extinguishing microcapsule imparts excellent flame-retardant properties to the solid electrolyte. Simultaneously, the fire-extinguishing microcapsule effectively reduces the crystallinity of the PVDF matrix, which is beneficial for improving the ionic conductivity of the electrolyte. Furthermore, the abundant C=O functional groups on the microcapsule shell can reversibly complex lithium ions through ion-dipole interactions and promote their rapid transport, thereby significantly improving the ion transference number of the polymer electrolyte and its stability at the lithium anode interface.

A composition comprising: a specific amount of poly (methyl methacrylate); a poly (carbonate-siloxane); an acrylic impact modifier; a first anti-scratch additive, the first anti-scratch additive comprising polyethylene; and a second anti-scratch additive, the second anti-scratch additive being different from the first anti-scratch additive. Methods for making the compositions and articles comprising the compositions are also described.

The invention discloses a method for improving hydrogen absorption and desorption cycle performance and poison resistance of a hydrogen storage alloy. The method comprises the following steps: ball-milling and mixing the hydrogen storage alloy and an additive in an inert atmosphere; the additive comprises one or more than two of polymethyl methacrylate, polyethylene, polypropylene and polycaprolactone. The long-acting cycle performance and the poison resistance of the hydrogen storage alloy can be remarkably improved, and the hydrogen storage alloy has the advantages of being simple in technological process, low in raw material cost, adjustable in component proportion, easy to apply on a large scale and the like.