26 results about "Ethyl vinyl ether" patented technology

The application discloses an indoor moisture-proof and water-resistant gypsum board and a preparation method thereof, and belongs to the technical field of gypsum board preparation. The preparation method of the indoor moisture-proof and water-resistant gypsum board comprises the following steps: S1, uniformly mixing building gypsum, modified fluorite gypsum, deionized water, a polyester adhesive, a composite water reducing agent, blast furnace slag powder and the like to obtain a gypsum slurry; S2, paving the gypsum slurry on a first layer of cover paper, paving a second layer of cover paper on the gypsum slurry, and performing compaction, final setting, drying and solidification to obtain the indoor moisture-proof and water-resistant gypsum board. The composite water reducing agent is obtained by the reaction of ethyl vinyl ether, trichlorofluoroethylene and allyltrimethoxysilane. The polyester adhesive is obtained by the reaction of allyl alcohol, phthalic anhydride and triallyl cyanurate. The prepared gypsum board not only has good moisture-proof and water-resistant performance, but also has good mechanical properties, thereby prolonging the service life and ensuring the quality of the gypsum board to a certain extent.

The invention relates to the technical field of oral care materials, and particularly discloses macromolecular hydrogel-based false tooth safety paste and a preparation method thereof. The macromolecular hydrogel-based denture safety paste is prepared from the following components in parts by weight: 10 to 20 parts of white oil, 20 to 40 parts of vaseline, 40 to 60 parts of polydopamine modified polyvinyl alcohol-based hydrogel, 20 to 40 parts of sodium carboxymethyl cellulose, 20 to 40 parts of methyl vinyl ether-maleic anhydride copolymer calcium sodium salt, 0.1 to 1 part of silicon dioxide, 0.1 to 1 part of 93 to 98 percent ethanol, 0.05 to 1 part of preservative, 0.1 to 2 parts of essence and 0.001 to 0.01 part of pigment. The polydopamine modified polyvinyl alcohol-based hydrogel is prepared from polyvinyl alcohol, dopamine hydrochloride, an activating agent, a coupling agent and poloxamer. According to the technical scheme provided by the invention, the prepared false tooth fixing paste has excellent properties of good bonding effect and strong durability.

The invention discloses an indoor moisture-proof and water-resistant gypsum board and a preparation method thereof, and belongs to the technical field of gypsum board preparation. The preparation method of the indoor moisture-proof and water-resistant gypsum board comprises the following steps: S1, uniformly mixing building gypsum, modified fluorgypsum, deionized water, a polyester adhesive, a composite water reducing agent, blast furnace slag powder and the like to obtain gypsum slurry; s2, the gypsum slurry is flatly laid on the first layer of surface protection paper, the second layer of surface protection paper is flatly laid on the gypsum slurry, compaction, final setting and drying curing are conducted, and the indoor damp-proof and water-resistant gypsum board is prepared; wherein the composite water reducing agent is obtained by carrying out a reaction on ethyl vinyl ether, trichlorofluoroethylene and allyl trimethoxy silane; the polyester adhesive is obtained by reaction of allyl alcohol, phthalic anhydride and triallyl cyanurate; the prepared gypsum board not only has good moisture-proof and water-resistant performance, but also has good mechanical performance, the service life of the gypsum board is prolonged to a certain extent, and meanwhile the quality of the gypsum board is guaranteed.

The application belongs to the technical field of sodium ion battery materials, and particularly relates to a sodium ion battery water-based binder and a positive electrode slurry thereof. Poly[(methyl vinyl ether)-(maleic acid)] is hydrolyzed in a sodium hydroxide solution, and poly[(methyl vinyl ether)-(sodium maleate)] is obtained after vacuum drying, which is used as a water-based binder for a sodium ion battery positive electrode. The water-based binder has both high-polarity groups and low-polarity groups, thus solving the problem of easy settlement of conductive carbon in the water-based binder, ensuring high adhesion between components, and enhancing the volume expansion relief and repair capacity of the water-based binder during the charging and discharging process of the positive electrode sheet compared with PVDF and other binders. In general, the water-based binder has strong adhesion, repair force and interface adaptability, is environment-friendly and low in cost, and can make P2-Na x The MO2 positive electrode material has good energy density and stable cycle characteristics when used in a sodium ion battery.

This invention discloses a durable superhydrophobic PFA coating, its preparation method, and its application. Belonging to the field of coating processing and functional material surface modification technology, it grafts γ-aminopropyl groups onto the surface of nanoparticles using a silane coupling agent KH550. These γ-aminopropyl groups are transformed into positively charged ammonium ions in an acidic environment. The repulsion between these ions with the same charge inhibits the aggregation of homogeneous particles, thus fundamentally solving the problem of easy detachment of nanoparticles within the coating. Furthermore, by grafting perfluorinated long chains onto the nanoparticle surface using fluorosilanes, surface energy is reduced, improving the hydrophobicity of the particles. Simultaneously, the similarity and similarity solubility between the long fluorocarbon chains and the PFA coating eliminate interfacial cracks, making it difficult for nanoparticles to peel off when the surface is subjected to friction. The coating prepared by this invention can provide excellent droplet bounce enhancement and droplet adhesion inhibition properties, and is expected to be applied in the field of low-temperature anti-icing.

A tetrafluoroethylene-propylene copolymer with a solidification point monomer is mixed with a five-membered copolymer of vinylidene fluoride (VDF), hexafluoropropylene (HFP), tetrafluoroethylene (TFE), perfluorinated methyl vinyl ether (PMVE), and ethylene (PE), using a peroxide as an initiator and an aid TAIC as a crosslinking agent, and the resulting co-solidified fluoroelastomer shows improved curing performance, improved mechanical properties, and improved compression set. The co-solidified fluoroelastomer shows improved chemical resistance to solvent aging systems, and better retention of mechanical properties after high temperature aging in solvent systems.

This invention provides a photoresist diluent composition and its preparation method, belonging to the field of semiconductor photolithography materials technology. The composition includes propylene glycol methyl ether, propylene glycol methyl ether acetate, an interface modifier, and an associative modifier pretreatment solution. The interface modifier is prepared by the acetalization reaction of triethylene glycol monomethyl ether and ethyl vinyl ether, and "can participate in the state regulation of the interface-related regions in the early stage of liquid film formation, and help to mitigate edge flow instability during spin coating." The associative modifier pretreatment solution uses methyl-terminated pentaerythritol polyoxyethylene ether as its core component. Its methyl-terminated polyoxyethylene segments can participate in the regulation of the local microenvironment around the resin, weaken the tendency of strong local effects, and improve the uniform spreading performance of the liquid film under high shear conditions. The two modifiers synergistically regulate coating behavior from both surface and bulk dimensions, helping to improve problems such as uneven film thickness, edge thickening, and coating defects existing in current diluents in advanced processes.

The present invention relates to phase change material (PCM) compositions comprising an aqueous solution of a salt hydrate phase change material component, one or more polymers, at least one of which is poly(4-styrenesulfonic acid-co-maleic acid), poly(methyl vinyl ether-alt-maleic acid), or polystyrenesulfonic acid, or mixtures of these polymers. The present invention also relates to methods of making PCM compositions comprising these polymers.

The present application relates to a kind of polyamide composite and its preparation method and application, belong to the composition technical field of polymer compound.The polyamide composite of the present application includes the following weight parts of component: polyamide 94~99.7 parts, tackifier 0.2~4 parts, processing aid 0.1~2 parts;The tackifier includes methyl vinyl ether-maleic anhydride copolymer and polytetrafluoroethylene.The polyamide composite has good processing ductility, can make the product prepared have excellent uniformity.

The invention relates to the field of functional composite materials, and discloses a preparation process of an ecological leather fiber velvet composite material and a product. The preparation process of the ecological leather fiber velvet composite material comprises the following steps: S1, needling sea-island fibers to prepare a non-woven fabric; s2, carrying out gum dipping treatment by using a polyurethane gum dipping solution, and drying; s3, decrement splitting, water washing and drying; s4, softening treatment and sanding; s5, soaking with a pretreatment solution, dyeing with a dyeing agent, and drying; the pretreatment liquid in the step S5 contains a dyeing auxiliary agent composed of polydimethyldiallylammonium chloride, a methyl vinyl ether-maleic anhydride copolymer and bis [3-(triethoxysilyl) propyl] amine, and the dyeing agent is an acid dye containing sulfonate. According to the preparation method, through the preparation process of firstly sanding and then dyeing, and optimizing the types of the pretreatment liquid and the dyeing agent, the prepared ecological leather fiber velvet composite material has relatively good dyeing uniformity, color fastness and soft comfort, and the problem of white exposure after abrasion does not occur.

The invention discloses a synthesis method of P-(1-ethoxyethoxy) styrene, which comprises the following steps: S1, reacting 4-acetoxystyrene with alkaline metal salt in an organic solvent system under the protection of inert gas, the reaction time in the S1 is 1-3 hours, the molar ratio of the 4-acetoxystyrene to the alkaline metal salt is 1: (2.2-2.8), and the reaction time in the S2 is 1-3 hours; adjusting the pH value of the reaction liquid, concentrating under reduced pressure, extracting and drying to obtain an intermediate p-hydroxystyrene; s2, in a mixed solvent system of dichloromethane containing a polymerization inhibitor and lower alcohol, p-hydroxystyrene and ethyl vinyl ether react under the catalytic action of pyridinium toluenesulfonate to obtain P-(1-ethyoxyl ethyoxyl) styrene; according to the present invention, the first step reaction is researched, the reaction condition is mild, the energy and the production cost are saved, the reaction time is short, the reaction process is simple, and the yield of the step is improved to be close to 100% so as to improve the total yield of the product.

An oral care composition is disclosed, comprising 0.01 to 10% by weight of a deposited polymer and a polyhydroxy fatty acid amide surfactant of formula (I); wherein R 1 It is a C1-C4 alkyl or hydroxyl-substituted C1-C4 alkyl; R 2 It is a straight-chain or branched, saturated or unsaturated hydrocarbon chain having 15 to 21 carbon atoms, and a beneficial agent selected from optical agents, antimicrobial agents and mixtures thereof; wherein the deposited polymers include xanthan gum, sodium alginate, pectin, modified starch, gelatin, carrageenan, gellan gum, fenugreek gum, konjac gum, tragacanth gum, arabic gum, γ-polyglutamic acid, sodium heparin, copolymers of methyl vinyl ether and maleic anhydride, polyacrylic acid, polystyrene sulfonate, deoxyribonucleic acid, poly(allylamine), locust bean gum, guar gum, polyglycolic acid, polylactic acid, poly(glycolic acid-co-lactic acid), chitosan, humic acid, phytic acid, derivatives thereof or mixtures thereof:

The invention relates to the technical field of polyvinylidene fluoride materials, in particular to a polyvinylidene fluoride offshore photovoltaic cable material. The polyvinylidene fluoride offshore photovoltaic cable material is prepared from the following raw materials in parts by mass: 40 to 70 parts of polyvinylidene fluoride, 20 to 50 parts of polyvinyl chloride, 5 to 15 parts of ethylene-trifluorochlor oethylene copolymer, 1 to 3 parts of perfluoroethyl vinyl ether, 0.1 to 1 part of dicumyl peroxide, 0.1 to 1 part of nano zinc oxide, 1 to 3 parts of calcium-zinc stabilizer, 10 to 30 parts of filler, 1 to 2 parts of lubricant and 0.5 to 1.5 parts of stearic acid. 1-2 parts of a plasticizer and 1-2 parts of a compatilizer. The requirement for long-term stable operation of an offshore photovoltaic cable in high-salt, high-humidity, high-temperature and strong-ultraviolet environments is effectively met, the requirement for long-term stable operation under severe offshore conditions is fully met, and meanwhile the preparation method is simple and suitable for large-scale application and popularization.

A method for modifying a material through rapid surface grafting, and a use thereof are provided. In the method, with an olefin-functionalized nanomaterial as a model matrix, a cycloolefin as a polymerization monomer, a Grubbs catalyst as an initiator, and ethyl vinyl ether as a terminator, surface olefin cross-metathesis is conducted to prepare a polyolefin-grafted nanomaterial. In the use, with a thermoplastic resin as a matrix and the surface-polyolefin-grafted nanomaterial as a reinforcing material, a composite is prepared. The compatibility between the reinforcing material and the thermoplastic resin matrix is evaluated through cross-sectional morphology and mechanical performance characterization. A chain-transfer reaction is adopted as an alternative approach for surface-initiated ring-opening metathesis polymerization to avoid the growth of polymer chains from the surface. This alternative approach can significantly improve a reaction rate, shorten a reaction time, and simplify a technical flow, and demonstrates a promising industrialization prospect.

The invention relates to a one-way moisture-conducting watermarking-free functional eyelet fabric and a production method thereof. Comprising a polyester quick-drying surface layer, a polyester hydrophobic inner layer and a connecting layer for connecting the polyester quick-drying surface layer and the polyester hydrophobic inner layer, the polyester hydrophobic inner layer is obtained by hydrophobic treatment of a hydrophobic treatment agent; the hydrophobic treatment agent is prepared from waterborne polyurethane resin, a waterborne polyisocyanate cross-linking agent, hydroxyl alkyl silicone wax, double-alcohol hydroxyl single-end-capped long-chain alkyl silicone oil and a processing aid; the polyester quick-drying surface layer is obtained by performing hydrophilic treatment on a hydrophilic quick-drying treatment agent; the hydrophilic quick-drying treatment agent is prepared from a water-based hydroxyl polyurethane dispersion, hydroxyl-terminated hyperbranched polyester, N-(beta-aminoethyl)-gamma-aminopropyl triethoxy silane, liquid polycaprolactone polyol, poly (methyl vinyl ether-ALT-maleic anhydride), sulfonated nano cellulose, blocked water-based polyisocyanate and a processing aid. The eyelet fabric prepared by the scheme has the advantages of moisture conductivity, quick drying, no watermark, durability and the like.

The present application relates to a kind of fluorescent enhancement composition and fluorescent enhancement liquid for tyramide signal amplification system.The fluorescent enhancement composition of the present application includes enhancer and cluster agent;The molar ratio of the enhancer and cluster agent is (0.1-1) mol:(1-10) mmol;The enhancer is one or more than two combinations of 4,4-bis (5-methyl-2-benzoxazolyl) stilbene, 2,5-bis (5-tert-butyl-2-benzoxazolyl) thiofene, 4,4'-bis (2-sulfonic acid sodium phenylvinyl) biphenyl and 1,2-bis (5-methyl-benzoxazolyl) -ethylene;The cluster agent is one or more than two combinations of alginic acid, povidone, methyl vinyl ether-maleic anhydride copolymer and carrageenan.The fluorescent enhancement liquid with the above-mentioned fluorescent enhancement composition for tyramide signal amplification system as main component can enhance the effect of fluorescent signal amplification, reduce non-specific coloring.

The invention provides modified phenolic resin, a preparation method thereof and an i-line chemical amplification photoresist composition, and relates to the technical field of semiconductor manufacturing. The modified phenolic resin is formed by common protection of hydroxyl of phenolic resin by 1, 4-butanediol divinyl ether and ethyl vinyl ether. The modified phenolic resin is jointly modified by 1, 4-butanediol divinyl ether and ethyl vinyl ether, and a cross-linked network is constructed by utilizing bifunctional groups so as to remarkably improve the heat resistance and the etching resistance and solve the problems of pattern deformation and'edge cutting '; meanwhile, the reaction activity is regulated by utilizing a single functional group, and the crosslinking abrupt property is relieved to broaden an energy window. And through the synergistic effect of the two components, the material has excellent heat resistance and corrosion resistance, wide process window and high resolution, and meets the high-precision microelectronic manufacturing requirements.

A fuel additive composition comprising butanol, pentanol, hexanol, heptanol, methylcyclohexanol, ethyl vinyl ether and nonanol. The composition may comprise 1-butanol, 2-butanol, 2-pentanol, 3-hexanol

The invention relates to the technical field of chemical engineering, in particular to a preparation method of cyclohexyl ethyl vinyl ether, which comprises the following steps: S1, by taking phenethyl alcohol as a raw material and low-boiling-point alcohol (ethanol or isopropanol) as a solvent, carrying out hydrogenation reduction at 50-65 DEG C and 5-6 MPa under the catalysis of nickel / ruthenium carbon to obtain cyclohexyl ethanol, and recycling the catalyst and the solvent; and S2, mixing cyclohexyl ethanol with alkenyl ether (preferably butyl vinyl ether), alkali (pyridine or triethylamine), a palladium catalyst (preferably palladium chloride) and a ligand 1, 10-phenanthroline in a protective gas atmosphere, performing catalytic alcohol exchange at 100-110 DEG C, washing reaction liquid with water to adjust the pH value to 7, passing through a column, and distilling to obtain the product. The method is mild in condition, low in equipment requirement, free of solid waste and environmentally friendly; the catalyst is small in dosage and recyclable, the solvent can be reused, and the cost is low; the product has high purity and high yield, and is suitable for industrial mass production.

The invention provides a foaming agent, rigid polyurethane foam and refrigeration equipment, and the foaming agent is prepared from pentane, perfluoroethyl vinyl ether and dimethyl formal, the mass ratio of the pentane to the perfluoroethyl vinyl ether to the dimethyl formal is (8 to 16): (1 to 10): (1 to 5). According to the foaming agent provided by the invention, through the synergistic effect of the pentane, the perfluoroethyl vinyl ether and the dimethyl formal in a specific mass ratio, rigid polyurethane foam with fine and uniform foam holes can be prepared, the heat conductivity coefficient of the foam is effectively reduced, and the thermal insulation property of the foam is improved; according to the present invention, the compression strength of the foam is improved, the molding density of the foam is significantly reduced, the foaming raw material can be effectively saved, the storage stability of the foaming agent in the foaming raw material is improved, the compatibility with the existing common ABS liner is improved, and the comprehensive performance of the rigid polyurethane foam is improved.

The application discloses a method for synthesizing poly(methyl ethyl vinyl ether) and belongs to the technical field of organic synthesis. The method comprises the following steps: pre-polymerizing vinyl methyl ether and vinyl ether under the action of a catalyst, then adding monomers drop by drop at 28-62 DEG C, and continuously polymerizing for 3-8 hours to obtain poly(methyl ethyl vinyl ether) which is a colorless transparent viscous liquid. The method has the advantages of simple operation, stable kinematic viscosity, low-temperature transparency and clarity, high yield and competitive advantage of the product.

The invention belongs to the technical field of synthetic fibers, and particularly relates to a preparation method of a procyanidine anti-oxidation polyamide filament, which comprises the steps of preparation of organic-inorganic hybrid silicon dioxide aerogel, adsorption, preparation of procyanidine functional particles and melt spinning. According to the preparation method, the silicon dioxide aerogel is subjected to hybrid modification, a vinyl ether structure in 2-chloroethyl vinyl ether and silicon hydroxyl are subjected to electrophilic addition to form Si-O-C bonds, the Si-O-C bonds and a Si-O-Si network jointly form a semi-interpenetrating network structure, and the organic-inorganic hybrid silicon dioxide aerogel which is good in mechanical property, compact in structure and good in dispersity is obtained. And the procyanidine is subjected to adsorption protection, so that the high-temperature loss of the procyanidine in the chinlon preparation process is reduced. The procyanidine antioxidant polyamide filament prepared by the method has excellent antibacterial and antioxidant properties, the antibacterial rates on staphylococcus aureus, escherichia coli and candida albicans are all greater than 95% after the procyanidine antioxidant polyamide filament is washed with water for 50 times, and the free radical scavenging rate is greater than 92%.

Described herein are an oral care compositions comprising a fluoride source, a polymer blend comprising a first polymer that is heat-sensitive and comprises a linear PEG / PPG triblock copolymer and polypropylene glycol(PPG)-SMDI copolymer, a second polymer comprising a copolymer of methyl vinyl ether and maleic anhydride, a third polymer comprising a triblock copolymer having a central hydrophobic block of polypropylene glycol with two end hydrophilic blocks of polyethylene glycol (PEG).

This invention relates to fuel additive compositions, blended fuels and the production thereof. In particular, the invention relates to a fuel additive composition that contains butanol, pentanol, hexanol, heptanol, methylcyclohexanol, ethyl vinyl ether and nonanol.

The application provides a perfluoroether raw rubber resistant to low temperature and strong oxidizing medium, a preparation method and application thereof. Specifically provided is a preparation method of an elastomer, which comprises the following steps: polymerizing a mixture of water, perfluoromethoxy methyl vinyl ether, an emulsifier, a chain transfer agent, an initiator and a vulcanization point monomer with tetrafluoroethylene to obtain the elastomer; wherein the tetrafluoroethylene is added in a gaseous form, and the polymerization reaction is carried out under 2-5 Mpa; the mass ratio of the perfluoromethoxy methyl vinyl ether to the emulsifier is 1:(0.01-0.1); the mass ratio of the perfluoromethoxy methyl vinyl ether to the chain transfer agent is 2:(0.01-0.1); and the mass ratio of the perfluoromethoxy methyl vinyl ether to the vulcanization point monomer is 2:(0.01-0.2). The preparation method can efficiently prepare the elastomer, and the obtained elastomer is resistant to low temperature, has good mechanical properties and good processability.