33 results about "Methyl vinyl ether-maleic anhydride copolymer" patented technology

The present disclosure provides a medical instrument with a coating that provides excellent lubricity when wet. The medical instrument possesses a coating including a wet lubricating film with high peel durability and anti-eluting properties. In embodiments, an intermediate film made of bisphenol A type epoxy resin is coated on a base material of a medical instrument made of metal, and a wet lubricant coating produced by alkaline processing of a polymer alloy containing a methyl vinyl ether maleic anhydride copolymer and a polyether block amide is then applied thereto. Methods for making these medical instruments are also provided.

The invention provides silicon oxide reinforced polyimide aerogel micro-powder and a preparation method thereof, and belongs to the technical fields of nano porous materials and heat insulation. The preparation method comprises the following steps: separately dissolving a methyl vinyl ether-maleic anhydride copolymer, 3-aminopropyltriethoxysilane and an aromatic diamine into a solvent; mixing thethree solutions according to a certain ratio, uniformly stirring the mixture, standing for reaction to form gel, preparing micro-powder gel by adopting a mechanical crushing method, and soaking the gel into a dehydrating agent; and finally, subjecting the dehydrated gel to solvent replacement, and supercritical drying to obtain the silicon oxide nanoparticle reinforced linear polyimide aerogel micropowder. The polyimide aerogel micro-powder obtained by the method is brown, has an organic-inorganic double-network structure, has rigidity of silicon oxide and toughness of polyimide, and has excellent characteristics including low density (0.03-0.3 g / cm<3>), a high specific surface area (200-600 m<2> / g), good high-temperature resistance and the like.

The invention discloses a preparation method of a medical dressing. Firstly, polyvinyl acetate, methyl vinyl ether-maleic anhydride copolymer and collagen are dissolved in an aqueous ethanol solution to obtain an electrospinning liquid primary material I, and then the polyvinyl acetate Dissolving methacrylic acid, acrylamide and N,N-methylenebisacrylamide with formic acid aqueous solution to obtain the electrospinning solution primary material II, and then mixing the electrospinning solution primary material I with the electrospinning solution primary material II, Adding nano clay, nano silver, vitamin C, borax, ethylene glycol and mannose, emulsifying after stirring, spinning the obtained electrospinning solution into a fiber film by electrospinning, vacuum filtering and drying to obtain a medical dressing. The obtained medical dressing can effectively sterilize and eliminate inflammation, improve the microcirculation of tissues around the injury, play the role of analgesia, inhibit bacterial reproduction and repair wounds, and is safe to use and has no toxic and side effects on human body.

The invention discloses a multifunctional anti-mosquito thermoplastic elastomer, prepared from the following components in parts by weight: 25-40 parts of a styrene-ethylene / propylene-styrene block copolymer (SEPS), 55-75 parts of a styrene-ethylene / butylene-styrene block copolymer (SEBS), 20-50 parts of polyolefin, 35-50 parts of a methyl vinyl ether-maleic anhydride copolymer, 25-45 parts of a maleic anhydride-phthalic anhydride-diethylene glycol polymer, 1-3 parts of an anti-mosquito component and 0-10 parts of other auxiliary agents. The thermoplastic elastomer prepared by the invention has a better mosquito repelling effect.

The invention discloses a sheath material for high-temperature-resistant mounting wires. The sheath material comprises, by weight, vinyl chloride, polychlorotrifluoroethylene-vinylidene fluoride copolymers, methyl vinyl ether-maleic anhydride copolymers, modified calcium peroxide, magnesium hydroxide, mica powder, ethyl vinyl ether, N-oxalation diethylene-2-benzothiazole sulfonamide, divinyl benzene, 2-crylic acid oxo di-2, 8-15 parts of 1-ethylidene ester, 0.6-1.9 parts of dibenzothiazyl disulfide, 4-cyclohexanone carboxylic acid ethyl ester, bis-[3-(triethoxy silicon) propyl] tetrasulfide, zinc stearate, calcium carbonate, carbon fiber and carbon black. The sheath material has the advantages that the sheath material is excellent in physical property, high in tearing strength and resilience property and good in high-temperature-resistant, flame-retardant and chemical-reagent-resistant properties; the modified calcium peroxide is added into the sheath material, accordingly, the sheath material is good in dispersibility and low in surface tension, and the tensile strength and various other properties of the sheath material further can be improved.

The invention relates to drugs for treating mouth mucosa diseases and the manufacture field of the drugs for treating mouth mucosa diseases, in particular to a mouth mucosa drug sustained release preparation for treating a mouth periodontal disease by doxycycline. The preparation is composed of a mouth mucosa contacted layer and a non-adhesiveness sealing layer. The mouth mucosa contacted layer comprises, by weight, 2-20 / 80-98 of antibiotic drugs and auxiliary materials. The components of the non-adhesiveness sealing layer are non-adhesiveness low water-solubility high-molecular polymers. The non-adhesiveness low water-solubility high-molecular polymers are chosen from polyvinyl alcohol. The components of mouth mucosa drug sustained release preparation comprise 2.0g of methyl vinyl ether-maleic anhydride copolymers, 2.0g of polyoxyethylene, 2.0g of carboxymethyl cellulose sodium, 12.0g of natural starch, 2.0g of menthol and 0.5g of doxycycline, and the rest is poval. The mouth mucosa drug sustained release preparation has the advantages that drug delivering is convenient, drug releasing time is long, drug releasing speed is even, targeting is strong, and adhesive force with mucosas is strong. In addition, the manufacturing method is simple in operation, low in cost, environment-friendly and suitable for industrial production.

The invention discloses a high-strength metal door. The high-strength metal door is formed through bonding metal plate blocks with a bonding agent, and the bonding agent is prepared from phosphate, a methyl vinyl ether-maleic anhydride copolymer, bone glue, ethanol, formaldehyde, starch and water through mixing. The high-strength metal door disclosed by the invention has the advantages that the firmness is good, and the production cost is low.

The invention belongs to the field of lithium-ion battery and in particular discloses preparation and application of gel polymer electrolyte. A preparation method comprises the following steps: firstly, dissolving poly(vinylidenefluoride-hexafluoropropylene) and a methyl vinyl ether-maleic anhydride copolymer in a solvent; then transferring into an injection device of an electrostatic spinning machine; taking a polyethylene membrane as a support and carrying out electrostatic spinning to obtain a uniformly-staggered fiber membrane; immersing the obtained fiber membrane in an electrolyte solution to form the gel polymer electrolyte. The gel polymer electrolyte obtained by the invention sufficiently integrates advantages of the poly(vinylidenefluoride-hexafluoropropylene) and the methyl vinyl ether-maleic anhydride copolymer and has extremely good liquid absorption performance and liquid keeping capability; an electrochemical stability window is high and the safety performance is greatlyimproved. A production technology is simple and raw materials have no toxicity and no pollution; the invention provides the preparation method of the gel polymer electrolyte.

The invention provides a method of preparing carbon-doped metal oxide nanoparticles by means of the supercritical anti-solvent technology and high-temperature calcination. The method comprises the following steps: dissolving metal nitrate and a methyl vinyl ether-maleic anhydride copolymer in a solvent to form a mixed solution; then atomizing the mixed solution placed in a columnar piston injectorat a certain flow rate and injecting the mixed solution to a supercritical fluid; preparing polymer nanospheres of inorganic salt embedded with inorganic salt under the anti-solvent action of the supercritical fluid at a temperature of 308-330K and at a pressure of 10-12MPa; and calcining the nanospheres embedded with the metal nitrate and the methyl vinyl ether-maleic anhydride copolymer at a high temperature to finally obtain the carbon-doped metal oxide nanoparticles, the grain sizes of which are 10-100nm. The synthetic method is simple and easy to control operating condition, and the function and application of the metal oxide nanoparticles are improved greatly.

The invention discloses a fiber shrinkage-reducing and anti-cracking agent and a preparation method thereof. The fiber shrinkage-reducing and anti-cracking agent is prepared from the following components in percentage by mass: 1 to 2.5 percent of micro-pore fibers, 0.5 to 1 percent of a shrinkage-reducing component, 30 to 45 percent of alunite powder, 20 to 30 percent of coal gangue powder and 30to 40 percent of gypsum; the shrinkage-reducing component is prepared by mixing a methyl vinyl ether-maleic anhydride copolymer and polyether glycol according to the mass ratio of 1 to (1.5 to 2.5); aplurality of micro-pores are formed in the surfaces of the micro-pore fibers, and the shrinkage-reducing component is adsorbed in the micro-pores by adopting a spraying drying method. According to the fiber shrinkage-reducing and anti-cracking agent, three types of anti-cracking materials are compounded to improve the anti-cracking capability of a concrete structure; the shrinkage-reducing component is adsorbed on the micro-pore fibers and a shrinkage-reducing effect is alleviated in a concrete hydration process; the micro-pore fibers and cement stones are more tightly combined and the earlytensile strength of concrete is increased; an expanded product is generated through the coal gangue powder, the alunite powder and the gypsum and the shrinkage of the concrete is compensated.

The invention discloses a preparation method of a functionalized graphite flake compound, which is characterized in that graphite powder, pyrene formaldehyde or pyrene butyric acid are used as raw materials to prepare the functionalized graphite flake compound through an ultrasonic exfoliation method, the graphite powder can be ultrasonically exfoliated into layered graphite flakes, and pyrene compounds can be adsorbed onto the graphite flakes through pi-pi interaction. Therefore, the aldehyde group or carboxyl functionalized graphite flake compound can be prepared. On the basis, hexamethylenediamine or amino-containing macromolecular polyethyleneimine and carboxyl-containing macromolecular polyacrylic acid or a methyl vinyl ether-maleic anhydride copolymer are further covalently bound to the surface of the graphite flake, so that the density of functional groups on the surface of the graphite flake is remarkably improved. The functionalized graphite flake compound obtained by the method is powdery and can be used for industrial mass production and modification of the printed electrode in a scattering manner, the method is simple and efficient, and the functionalization of the printed electrode provides convenience for subsequent biomolecule immobilization.

The invention provides rendering test paper for quick detection of cyanides, comprising a cyanide detection layer. The cyanide detection layer is composed of, by weight, 3-12 parts of sodium hydroxide, 8-15 parts of isonicotinic acid, 1-5 parts of triton X-100, 3-15 parts of barbituric acid, and 30-90 parts of methyl vinyl ether-maleic anhydride copolymer. The rendering test paper herein uses no bitter acids and other flammable explosive dangerous reagents during the detection process, the reaction time is short, the operating process is simple and fast, the detection cost is low, the detection cost for single sample detection is about 0.1 Yuan, the detection sensitivity and accuracy are high, rendered color uniformity is good, and the shelf life is long.