147 results about "Methyl vinyl ether" patented technology

A storable, hydraulically-active, cementitious slurry is made and used to cement within subterranean foundations for oil and gas wells. The slurry is made from a hydraulically-active cementitious material, a suspending agent, and, as a retarder, boric acid. The boric acid is present in the cementitious slurry in an amount sufficient to lower the pH of the storable cementitious slurry to at least 12.0, preferably to at least 11.0 or preferably, for reasons of longevity, to a pH of at least 9.0. Generally the amount of boric acid in the cementitious slurry is between from about 1 to about 6 percent by weight. Preferred as suspending agent are iota carrageenan as well as poly (methyl vinyl ether / maleic anhydride) decadiene copolymer. The slurry remains liquid during storage. The slurry is activated when needed for cementing and is pumped into the subterranean formation where it is allowed to set.

The composition for stimulating an immune response in a subject comprises methyl vinyl ether and maleic anhydride copolymer-based nanoparticles. Said nanoparticles may further contain an allergen or an antigen and / or an immunostimulating agent, which may be contained inside said nanoparticles and / or at least partially coating the surface of said nanoparticles, and optionally a cross-linking agent. The immune response stimulating composition is useful as an adjuvant in immunotherapy and vaccines.

The present invention relates to nanoparticles for encapsulating compounds, the preparation and uses thereof, said nanoparticles being based on half (C1-C4) alkyl esters of poly (methyl vinyl ether-co-maleic anhydride) (PVM / MA) copolymers. Said nanoparticles can encapsulate or incorporate a product of interest for use in the agricultural, cosmetic, food or pharmaceutical fields.

The invention discloses hydrogel for three-dimensional culturing of tumor cells and applications thereof, and particularly relates to applications in fundamental research related to oncology and anti-tumor drug screening. The hydrolysis product of polymethyl vinyl ether maleic anhydride, i.e., methyl vinyl ether maleic anhydride copolymer, and a hydrogel cross-linking agent polyethylene glycol are used for a cross linking reaction to prepare the hydrogel suitable for being used as a three-dimensional culture medium of various tumor cells. Compared with commercialized BME gel and Collagenl gel available on the market, the hydrogel is determined to have the capabilities of simulating in-vitro environment and supporting three-dimensional growth of growth of cells in the culture medium through researching diversity factors of cell adhesion abilities and cell growth curves on tumor cell transfer and invasion, drug resistance experiments of anti-tumor drugs and the like, thus providing a three-dimensional cell culture model for researches on tumor molecular biology characteristics, drug screening and the like.

The invention relates to a preparation method of a binary acid refined adsorbing material. According to the preparation method, co-monomers, namely beta-myrcene, vinyl methyl silicone (diol) diacetate and N,N-methylene bisacrylamide, are added into vinylidene chloride, a dispersing aid (methyl vinyl ether copolymerized maleic acid) is added to generate a polymer, and the polymer is utilized for extracting decolored binary acid with a long carbon chain. The preparation method has the advantages that the adsorbing capacity is high, and the loss of binary acid caused by the repeated crystallization and filtration can be reduced.

To provide a patch containing fentanyl for mucous membrane of the oral cavity (oral transmucosal fentanyl), which rapidly increases the serum concentration of the drug, is easy in handling and is superior in safety. A patch containing fentanyl for mucous membrane of the oral cavity, which can be prepared by laminating on one side of a drug layer which contains fentanyl or its salt as an active ingredient, methyl vinyl ether-maleic anhydride copolymer as an adhesive, and at least one substance selected from the group consisting of hydroxypropylcellulose, hydroxypropylmethylcellulose and hydroxyethylcellulose as a thickener, a support layer hardly soluble or insoluble in water, and a backing in their order.

A liquid-absorbent composition, which has a liquid-absorbent crosslinked resin that exhibits excellent absorption of the nonaqueous electrolyte of nonaqueous electrolyte secondary cells that constitute a nonaqueous electrolyte battery pack (and particularly a lithium ion nonaqueous electrolyte rechargeable battery pack), contains a powder of a liquid-absorbent crosslinked resin produced by crosslinking a methyl vinyl ether / maleic anhydride copolymer with a polyfunctional isocyanate compound, and a binder resin. Also, a liquid-absorbent sheet for a nonaqueous electrolyte battery pack contains supporting substrate and formed on one side of a supporting substrate a liquid-absorbent crosslinked resin layer, produced by crosslinking a methyl vinyl ether / maleic anhydride copolymer with a polyfunctional isocyanate compound. The nonaqueous electrolyte battery pack contains a battery case and disposed within the battery pack a nonaqueous electrolyte battery cell, a wiring circuit board, and an electrolyte absorption member formed from the liquid-absorbent sheet for absorbing electrolyte in the event that electrolyte leaks from the nonaqueous electrolyte battery cell.

The invention provides a aqueous slurry useful for chemical mechanical polishing a semiconductor substrate having copper interconnects. The slurry comprises by weight percent, 0 to 25 oxidizing agent, 0.1 to 50 abrasive particles, 0.001 to 10 inhibitor for decreasing static etch of the copper interconnects, 0.001 to 5 poly(methyl vinyl ether) having a formula as follows:and the poly(methyl vinyl ether) is water soluble and n has a value of at least 5, 0.005 to 1 aminobutyric acid, 0.01 to 5 phosphorus-containing compound, 0 to 10 copper complexing agent formed during polishing and balance water.

The invention belongs to a method for preparing a vinyl ether compound, in particular to the method for preparing 4-hydroxy butyl vinyl ether. In the reaction of 1,4-butanediol and acetylene, dimethyl sulfoxide is added so that beneficial effects are achieved for the reaction, wherein the content of a 4-hydroxy butyl vinyl ether crude product is improved to 81 percent from 72 percent before adding; and a cyclic acetal byproduct is reduced to about 4 percent from 6 percent before adding. The content of the crude product can be further improved by 1 to 2 percent by adding a cationic surface active agent, namely octadecyl trimethyl ammonium chloride.

A positive resist composition contains a novolak resin in which 3-27 mol % of the hydroxyl group hydrogens are substituted with 1,2-naphthoquinonediazidosulfonyl ester groups, a methyl vinyl ether-monoalkyl maleate copolymer and optionally, an alkali-soluble cellulose whose glucose ring substituent groups are substituted with organic groups at a specific rate. The composition is useful as a thick film photoresist which is subject to a plating step and offers many advantages including high sensitivity, perpendicular geometry, high resolution, and crack resistance during and after the plating step.

A method and composition for treating metal surfaces improves the paint adhesion of the metal surface, particularly its resistance to delamination of paint over a stressed area in the finished metal upon exposure to hot water. The composition is an aqueous composition of an organo-functional silane, a compound of a group IV-B element, and a polymer blend having a plurality of carboxylic functional groups and a plurality of hydroxyl groups. The method includes contacting a metal surface, such as aluminum, with the composition. The polymer blend is preferably a mixture of polymethylvinylether-co-maleic acid and polyvinyl alcohol. The organo-functional silane is preferably an epoxy silane.

The invention relates to a polyurethane material which is obtained by comprehensively utilizing a method combining semi-continuous living cationic polymerization and 'click' chemistry technology and has adjustable surface hydrophilicity, concretely speaking, poly(vinyl methyl ether) or methyl vinyl ether and a copolymer of other monomers are grafted on the surface of the polyurethane material to obtain the surface functionalized polyurethane material. The invention aims to provide a simple and practicable method to modify the surface of polyurethane so as to obtain the required surface with controllable hydrophilicity. By the method, the functional polyurethane material with adjustable surface hydrophilicity and excellent mechanical property can be obtained, and the problem of combining PMVE and polyurethane can be solved, thus forming the novel functional polyurethane material which is simple in technology, economical and practical.

Disclosed are anti-erosion oral care formulations and methods that provide erosion protection while maintaining adequate cleaning performance. The anti-erosion oral care formulations include a copolymer of a methylvinyl ether and a maleic anhydride and a metal compound or salt that becomes more soluble at acidic pH.

A positive resist composition contains a novolak resin in which 3-27 mol % of the hydroxyl group hydrogens are substituted with 1,2-naphthoquinonediazidosulfonyl ester groups, a methyl vinyl ether-monoalkyl maleate copolymer and optionally, an alkali-soluble cellulose whose glucose ring substituent groups are substituted with organic groups at a specific rate. The composition is useful as a thick film photoresist which is subject to a plating step and offers many advantages including high sensitivity, perpendicular geometry, high resolution, and crack resistance during and after the plating step.

The invention discloses an injectable self-healing hydrogel based on methyl vinyl ether-maleic acid copolymer / sodium alginate oxide and a preparation method thereof. This hydrogel is in mesh structure; the hydrogel that is injectable and self-healable is obtained by: subjecting ADH-g-P(MVE-alt-MA) and sodium alginate oxide to dehydration-condensation reaction in phosphate buffer solution at 37 DEG C to generate reversible acylhydrazone bonds, wherein ADH-g-P(MVE-alt-MA) is obtained by modifying methyl vinyl ether-maleic acid copolymer via adipic dihydrazide, and the sodium alginate oxide is obtained by oxidize-reacting sodium periodate with sodium alginate. The invention has the advantages that a synthetic process of the self-healing hydrogel is simple and green with mild reaction conditions, the hydrogel can gelatinize and self-heal at room temperature, and the hydrogel has a promising application prospect in the biomedical fields such as drug sustained release and cellular 3D culture carriers.

A perfluoroelastomer composition comprises a perfluoroelastomer (e.g., tetrafluoroethylene / perfluoro(methyl vinyl ether) copolymer), an organic peroxide (e.g., 2,5-dimethyl-2,5(tert-butylperoxy)hexane and a scorch retarder (e.g., o-phenylphenol), and the perfluoroelastomer composition is excellent in processability and unlikely to scorch. Furthermore, a perfluoro rubber molded article obtained by thermal crosslinking of the perfluoroelastomer composition is excellent in rubber physical properties such as tensile strength and elongation at break and in a compression set property.

A pH sensitive hydrogel and its production are disclosed. The hydrogel consists of carboxy-methyl chitose, poly-methyl-vinyl ether, cross-linking agent glutaric dialdehyde and water. The proportion of carboxy-methyl chitose: poly-methyl-vinyl ether is 1:0.25-1.5 mol; proportion of cross-linking glutaric dialdehyde: carboxy-methyl chitose is 1:10-30 mol, residue is water. The production is carried out by agitating, dissolving carboxy-methyl chitose and poly-methyl-vinyl ether into deionized water in proportion of 1:0.25-1.5 mol, mixing, controlling concentration of them between 0.05-0.1 M, dripping glutaric dialdehyde into mixed solution in proportion of 1:10-30 mol, agitating while reacting for 30-60 mins, laying aside, pouring it into mould, drying at room temperature and weighing to obtain semi-penetrating network pH sensitive hydro-gel. It has excellent sensitivity, adhesion, flexibility and degradability. It can be used as medicine slow-releasing carrier.

The invention relates to a norbornene, acrylonitrile and perfluoromethyl vinyl ether ternary polymerization catalyst and a ternary polymerization method. The invention is characterized in that the preparation method of the catalyst includes: in a glove box of nitrogen atmosphere, dissolving vanadium trichloride and a ligand in a first solvent in a conical flask to obtain a mixed solution; then under magnetic stirring, dripping alkyl aluminum into the mixed solution, then further performing stirring for 30-60min at 30-60DEG C, steaming off part of the first solvent, conducting standing and filtering to obtain solid crystals, i.e. a vanadium-aluminum complex catalyst; adding a norbornene monomer, acrylonitrile and a perfluoromethyl vinyl ether monomer into a repeatedly vacuumized and nitrogen charged high pressure kettle, and adding a second solvent for dissolution; then adding the vanadium-aluminum complex catalyst for reaction; washing and filtering the reaction product, and conducting drying, thus obtaining a norbornene, acrylonitrile and perfluoromethyl vinyl ether terpolymer.

The present invention discloses a preparation method for special low-temperature resistant fluororubber. The method comprises: in a pressure resistant reactor, adding deionized water and special fluoroether carboxylate as a surfactant; after deoxidation of the reactor, performing heating and stirring; introducing vapor fluorine-containing monomers that comprises the following materials in percentage by weight: 20%-70% of vinylidene fluoride, 10%-40% of hexafluoropropene, 0%-70% of tetrafluoroethylene and 0%-40% of other selectable comonomer that is one of the monomers or a combination of more than one monomers selected from: perfluoro methyl vinyl ether, perfluoro ethyl vinyl ether, perfluoro propyl vinyl ether, fluoroethylene, ethylene, propylene, trifluoroethylene, chlorotrifluoroethylene, difluoro dichloroethylene, 3,3,3-trifluoropropene, and perfluoroalkyl ethylene; and then adding a free radical initiator to prepare the fluororubber, wherein the reaction temperature is controlled at 20-140 DEG C, and the reaction pressure is controlled at 1-50 atmospheric pressure, and the concentration of the special fluoroether carboxylate in the final emulsion product is 0.01%-3%.

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.

A fluorine-containing elastomer having a copolymer composition, which comprises (a) 50-85 mol. % of vinylidene fluoride, (b) 0-25 mol. % of tetrafluoroethylene, (c) 7-20 mol. % of perfluoro(methyl vinyl ether), (d) 2.5-15 mol. % of CF2═CFO[CF2CF(CF3)O]nCF3 (n: 2-6), (e) 0.1-2 mol. % of CF2═CFO[CF2CF(CF3)O]mCF2CF3 (m: 2-6), and (f) 0.1-2 mol. % of RfX (Rf: an unsaturated fluorohydrocarbon group having 2-8 carbon atoms, which can contain at least one ether bond, X: bromine or iodine), can provide a fluorine-containing elastomer composition, which comprises 100 parts by weight of the fluorine-containing elastomer, 0.1-10 parts by weight of an organic peroxide, 0.1-10 parts by weight of a polyfunctional unsaturated compound, and at least 2 parts by weight of an acid acceptor. The composition can give vulcanizates having a distinguished elongation at break at high temperatures such as 100° C., and distinguished compression set characteristics at low temperatures such as 0° C.

The invention relates to synthesis of an amphipathic polyanhydride carrier material and application of self-assembled nanoparticles of the amphipathic polyanhydride carrier material in medicine delivery. The amphipathic polyanhydride carrier material is prepared by taking amphipathic cyclodextrin and a derivative of the amphipathic cyclodextrin as a hydrophilic end together an ester bond and a hydrophobic methyl vinyl ether / maleic anhydride copolymer. The carrier material has double inhibition function of biological adhesion and excretion protein (P-gp) and metabolic enzyme (CYP450), the lymph transfer of medicines is promoted, the first pass effect of livers can be reduced, the remarkable increase of oral bioavailability is finally achieved, and wide application prospect is achieved.

The present invention aims to provide a biaxially stretched porous membrane having high strength, a small pore size, and excellent homogeneity. The biaxially stretched porous membrane of the present invention includes polytetrafluoroethylene obtained by copolymerizing tetrafluoroethylene and perfluoro(methyl vinyl ether).

A method of shale inhibition comprises adding a two-phase polymer system of a water soluble copolymer of vinyl pyrrolidone and dimethylaminopropyl methacrylamide and in-situ formed water-insoluble particles of said copolymer, or, alternatively, a water-soluble copolymer of methylvinyl ether and maleic anhydride, into a drilling well fluid under aqueous, high temperature, high salinity conditions.

Disclosed herein is a crosslinked fluoropolymer network formed by the free radical initiated crosslinking of a diacrylate fluoropolymer The diacrylate copolymer is of formula CH2═CR′COO—(CH2)n—R—(CH2)n—OOCR′═CH2, wherein R is selected from the group consisting of i) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), ii) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, iii) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and iv) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin, R′ is H or —CH3, n is 1-4 and wherein said oligomer has a number average molecular weight of 1000 to 25,000 daltons. The source of the free radicals may be a photoinitiator or an organic peroxide.

Fluorosilicon polymers are disclosed that are prepared by a process comprising reacting a) iodinated oligomers having copolymerized units of perfluoro(methyl vinyl ether) and vinylidene fluoride or tetrafluoroethylene that contain 40-90 mole percent copolymerized units of vinylidene fluoride or tetrafluoroethylene and 10-60 mole percent copolymerized units of perfluoro(methyl vinyl ether), said oligomers having two functional endgroups and having a number average molecular weight between 1000 and 25,000 with b) a methoxyvinyl silane or an ethoxyvinyl silane to form a silicon-containing polymeric adduct that is further reacted with an acid to form a crosslinked fluorinated polymer.

[Problem] To provide a fluororubber composition that does not suffer from deposition, during extrusion, of a talc component contained in a heat- and low-temperature-resistant colorable fluororubber, that is capable of providing products having performance equal to that of conventional mass-produced materials, and that is capable of substantially reducing the rejection rate in the preparation of green stock; and a process for producing a crosslinked fluororubber product.[Means for Solving the Problem] A fluororubber composition comprising a fluororubber containing a fluoropolymer that is crosslinkable with a peroxide; a peroxide crosslinking agent; and a heat-resistant filler containing a calcined talc having a hydrophilic surface; a content of the calcined talc being from 2 to 20 parts by weight based on 100 parts by weight of the fluoropolymer. Preferably, the fluoropolymer that is crosslinkable with a peroxide is a low-temperature-type terfluoropolymer having a TR10 value of from −40 to −25° C.; and more preferably, the low-temperature-type terfluoropolymer is a vinylidene fluoride / perfluoro(methyl vinyl ether) / tetrafluoroethylene terfluoropolymer.

The invention relates to a norbornene, tetrafluoroethylene and perfluoromethyl vinyl ether ternary copolymerized catalyst and a ternary copolymerization method, and is characterized in that the preparation method of the catalyst comprises the following steps: in a dry container with an inert gas atmosphere, dissolving di(t-butylcyclopentadienyl)titanium (IV) dichloride and a ligand in a first solvent, to obtain a mixed solution; then dropping alkyl aluminum into the mixed solution, and stirring for 30-60 minutes at the temperature of 30-60 DEG C, to obtain a titanium-aluminum complex catalyst; taking a norbornene monoer, tetrafluoroethylene and a perfluoromethyl vinyl ether monomer according to the molar ratio of 1:1:1, adding the components into a high pressure kettle vacuumized for multiple times and filled with nitrogen, adding a second solvent, and dissolving; then adding the titanium-aluminum complex catalyst, and completing a reaction under certain conditions; and washing and drying the reaction product to obtain the norbornene, tetrafluoroethylene and perfluoromethyl vinyl ether ternary copolymerized catalyst.