47 results about "Propyl vinyl ether" patented technology

The invention relates to the field of flame retardants, in particular to modified magnesium hydroxide for a high-filling material and a preparation method of the modified magnesium hydroxide. The preparation method of the modified magnesium hydroxide comprises the following steps: step 1, carrying out surface amination treatment on magnesium hydroxide particles; step 2, reacting the aminated magnesium hydroxide particles with allylsulfonyl chloride to obtain activated magnesium hydroxide particles; 3, the activated magnesium hydroxide particles react with hydroxypropyl vinyl ether, and modified magnesium hydroxide is obtained. The modified magnesium hydroxide for the high-filling material prepared by the invention has excellent flame-retardant filling property when being applied to a high-molecular material, and compared with a traditional magnesium hydroxide filler, not only is the flame retardance of the high-molecular material improved, but also the mechanical strength and the impact resistance of the high-molecular material are well improved.

There is provided a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit and perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of hexafluoropropylene unit of 9.0 to 11.5% by mass with respect to the whole of the monomer units, a content of perfluoro(propyl vinyl ether) unit of 0.3 to 0.7% by mass with respect to the whole of the monomer units, and a melt flow rate at 372° C. of 0.9 to 7.5 g / 10 min.

This application relates to the field of insulating materials, specifically disclosing a flexural insulating material, its preparation method, and a robot cable, comprising the following raw materials in parts by weight: 50-80 parts of low-density polyethylene, 30-40 parts of medium-density polyethylene, 30-40 parts of ethylene-tetrafluoroethylene-perfluoropropyl vinyl ether terpolymer, 1-20 parts of filler, 3-8 parts of compatibilizer, 0.1-5 parts of crosslinking agent, and 0.1-5 parts of co-crosslinking agent. This invention addresses the performance shortcomings of existing insulating materials, achieving a balance of flexural resistance, abrasion resistance, insulation stability, and excellent flexibility, thus meeting the stringent requirements of high-frequency cables used in robots / manipulators.

The invention discloses a perfluoropropyl vinyl ether-acrylonitrile copolymer as well as a preparation method and application thereof. The perfluoropropyl vinyl ether-acrylonitrile copolymer disclosed by the invention is formed by copolymerizing perfluoropropyl vinyl ether and acrylonitrile according to a molar ratio of 1: (2-4). The perfluoropropyl vinyl ether-acrylonitrile copolymer has the high pressure resistance of cyano groups, the flexibility of ether bonds and the hydrophobicity of fluorocarbon bonds, and has the advantages of being excellent in adhesive property, good in chemical stability, good in flexibility, balanced in hydrophilicity and hydrophobicity and the like; the lithium ion battery positive electrode material binder can improve the cycle life and the rate capability of the lithium ion battery under the conditions of high voltage and high load, and is suitable for large-scale industrial application.

Provided is a fluorine-containing copolymer which is a fluorine-containing copolymer containing tetrafluoroethylene units, hexafluoropropylene units, and perfluoro(propyl vinyl ether) units, wherein the content of the hexafluoropropylene units is 7.0 to 12.0 mass% relative to the total monomer units, the content of the perfluoro(propyl vinyl ether) units is 1.5 to 2.9 mass% relative to the total monomer units, and the melt flow rate at 372°C is 40 to 60 g / 10 minutes.

This invention provides a fluorinated copolymer containing tetrafluoroethylene units, hexafluoropropylene units, and perfluoro(propyl vinyl ether) units, wherein the content of hexafluoropropylene units is 4.10 mol% to 5.20 mol% relative to all monomer units, the content of perfluoro(propyl vinyl ether) units is 0.53 mol% to 0.86 mol% relative to all monomer units, and the melt flow rate at 372°C is 0.7 g / 10 min to 2.5 g / 10 min.

Provided is a fluorine-containing copolymer which is a fluorine-containing copolymer containing tetrafluoroethylene units, hexafluoropropylene units, and perfluoro(propyl vinyl ether) units, wherein the content of the hexafluoropropylene units is 7.0 to 9.4 mass% relative to the total monomer units, the content of the perfluoro(propyl vinyl ether) units is 1.5 to 2.9 mass% relative to the total monomer units, and the melt flow rate at 372°C is 15 to 40 g / 10 minutes.

The invention relates to the technical field of photoresist, and particularly discloses ArF photoresist film-forming resin, a preparation method thereof and a photoresist composition containing the resin. The ArF photoresist film-forming resin is prepared by copolymerizing a norbornene monomer, maleic anhydride and perfluoro-n-propyl vinyl ether according to a ratio of (60 to 75 mol%): (20 to 35 mol%): (5 to 10 mol%). The preparation method comprises the following steps: dissolving, heating and polymerizing, purifying and drying. The ArF photoresist composition comprises ArF photoresist film-forming resin, an alkaline additive, a photoacid generator and an organic solvent, and the specific preparation method comprises the following steps: uniformly mixing the ArF photoresist film-forming resin, the alkaline additive, the photoacid generator and the organic solvent in a nitrogen atmosphere in a dark place according to a ratio to obtain the ArF photoresist composition. The ArF photoresist composition obtained in the invention has the characteristics of high resolution and good corrosion resistance.

The application discloses a kind of corrosion-resistant PTFE sealing ring and its production process, the raw material includes polytetrafluoroethylene, modified polytetrafluoroethylene and modified filling material;The production process includes: the modification of filling material, the modification of polytetrafluoroethylene and the preparation of sealing ring;First, the application utilizes perfluorooctyl triethoxysilane and gamma-glycidyl ether oxygen propyl trimethoxysilane modified nano h-boron nitride and silicon carbide powder, prepares filling material, under the effect of not affecting the nature of polytetrafluoroethylene itself, realize the significant improvement of wear resistance, thermal conductivity and anti creep performance of sealing ring;The application introduces ether chain by copolymerizing silane modified polytetrafluoroethylene and perfluoropropyl vinyl ether under ammonium persulfate initiation, finally introduces amino group by gamma-aminopropyl triethoxysilane, realizes the close combination with filling material, binder, to improve the connectivity with material, enhance sealing capacity.

The present invention discloses a pH-responsive nanocomplex, a preparation method thereof and applications, belonging to the technical field of biomedicine. The preparation method of the pH-responsive nanocomplex disclosed by the present invention includes: S1. Using N-(2-hydroxyethyl) acrylamide, PPTS and allyl vinyl ether as raw materials to react to generate AEEAA; S2. Reacting PAMAM with AEEAA to generate PAMAM-acetal-ene; S3. Reacting benzoin diethyl ether, cysteamine hydrochloride with PAMAM-acetal-ene to synthesize PAMAM-acetal-NH2; S4. Mixing and reacting PAMAM-acetal-NH2 with VDQACs in water to synthesize a pH-responsive nanocomplex. The present invention also discloses the pH-responsive nanocomplex prepared by this method and its application in the preparation of drugs for preventing and / or treating dental caries. The nanocomplex of the present invention releases the antibacterial drug VDQACs in response to pH changes to kill pathogenic bacteria; at the same time, the nanocomplex also has an unexpected remineralization induction function.

The invention discloses a corrosion-resistant PTFE (Polytetrafluoroethylene) sealing ring and a production process thereof. The corrosion-resistant PTFE sealing ring is prepared from the following raw materials: polytetrafluoroethylene, modified polytetrafluoroethylene and a modified filling material, the production process comprises the steps of modification of a filling material, modification of polytetrafluoroethylene and preparation of the sealing ring. According to the invention, firstly, nano h-boron nitride and silicon carbide powder are modified by using perfluorooctyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane to prepare a filling material, so that the wear resistance, thermal conductivity and creep resistance of the sealing ring are remarkably improved under the action of not influencing the properties of polytetrafluoroethylene; according to the invention, silane modified polytetrafluoroethylene and perfluoropropyl vinyl ether are subjected to copolymerization under the initiation of ammonium persulfate, an ether chain is introduced, and finally amino is introduced through gamma-aminopropyltriethoxysilane, so that tight combination with a filling material and a binder is realized, the connectivity with a matching material is improved, and the sealing capability is enhanced.

The present application provides a fluorine-containing copolymer which is a fluorine-containing copolymer containing tetrafluoroethylene units, hexafluoropropylene units and perfluoro(propyl vinyl ether) units, wherein the content of the hexafluoropropylene units is 9.5 to 12.2 mass% relative to the total monomer units, the content of the perfluoro(propyl vinyl ether) units is 0.5 to 1.4 mass% relative to the total monomer units, the melt flow rate at 372°C is 0.8 to 4.0 g / 10 minutes, the number of -CF2H groups is more than 50 per 10 6 main chain carbon atoms.

The present invention provides a copolymer comprising tetrafluoroethylene units and perfluoro(propyl vinyl ether) units, wherein the content of the perfluoro(propyl vinyl ether) units is 3.5% to 4.2% by mass relative to all monomer units, the melt flow rate at 372°C is 34.0 g / 10 min to 42.0 g / 10 min, and the number of functional groups is 10 6 The number of carbon atoms in the main chain is 50 or less.

The invention belongs to the field of functional polymer coatings, and particularly relates to a hydrophobic transparent amorphous fluorine-containing polymer coating and a preparation method thereof.The coating is obtained by conducting blade coating on a solution containing an amorphous fluorine-containing polymer to form a film and conducting drying and curing; wherein the amorphous fluorine-containing polymer is a copolymer obtained by carrying out a copolymerization reaction on a pentafluorostyrene monomer and a perfluoropropyl vinyl ether monomer and then carrying out precipitation, separation and drying. The amorphous fluorine-containing polymer coating has high transparency and excellent hydrophobicity, the static water contact angle of the amorphous fluorine-containing polymer coating can reach 117-120 degrees, the light transmittance of the amorphous fluorine-containing polymer coating in the wave band of 400-1000 nm is higher than 85%, the preparation process is simplified, operation is easy, conditions are mild, aftertreatment is simple, and the preparation cost can be effectively controlled.

The present invention provides a copolymer comprising tetrafluoroethylene units and perfluoro(propyl vinyl ether) units, wherein the content of the perfluoro(propyl vinyl ether) units is 4.1% to 4.9% by mass relative to all monomer units, the melt flow rate at 372°C is 33.0 g / 10 min to 45.0 g / 10 min, and the number of functional groups is 10 6 The number of carbon atoms in the main chain is 50 or less.

The application relates to the technical field of high polymer insulating materials, and discloses a high-temperature and high-voltage PFA aviation cable insulating material and a preparation method thereof. The insulating material takes perfluoropropyl vinyl ether-tetrafluoroethylene copolymer (PFA) as a matrix, introduces one-dimensional silicon dioxide nanorods with a specific mass fraction, realizes nanoscale uniform dispersion through end group fluorination stabilization treatment and high-shear melt blending process. The nanorods are matched with PFA molecular chains in size, form a stable interface structure, thereby reducing the free volume fraction of the material, limiting the movement of molecular chains, and introducing a deep trap structure to inhibit the accumulation of space charges. Compared with the prior art, the application realizes the synergistic improvement of the high-temperature resistance, mechanical properties and electrical insulation properties, has high breakdown field strength and excellent anti-creeper capacity, and is suitable for the long-term stable operation of aviation cables in a high-temperature and high-voltage environment.

The present application provides a copolymer containing tetrafluoroethylene units and perfluoro(propyl vinyl ether) units, the content of the perfluoro(propyl vinyl ether) units being 3.9 to 5.5 mass% relative to the total monomer units, the melt flow rate at 372°C being 2.8 to 4.0 g / 10 minutes, the number of functional groups being 20 or less per 10 6 main chain carbon atoms.

Provided is a fluorine-containing copolymer which is a fluorine-containing copolymer containing tetrafluoroethylene units, hexafluoropropylene units, and perfluoro(propyl vinyl ether) units, wherein the content of the hexafluoropropylene units is 6.0 to 7.6 mass% relative to the total monomer units, the content of the perfluoro(propyl vinyl ether) units is 1.5 to 2.4 mass% relative to the total monomer units, and the melt flow rate at 372°C is 4.5 to 9.5 g / 10 minutes.

Provided is a fluorine-containing copolymer which is a fluorine-containing copolymer containing tetrafluoroethylene units, hexafluoropropylene units, and perfluoro(propyl vinyl ether) units, wherein the content of the hexafluoropropylene units is 6.0 to 7.6 mass% relative to the total monomer units, the content of the perfluoro(propyl vinyl ether) units is 1.2 to 1.9 mass% relative to the total monomer units, and the melt flow rate at 372°C is 2.8 to 4.4 g / 10 minutes.

This invention belongs to the field of mechanochromic materials technology, specifically relating to a vinyl acetate-n-propyl vinyl ether copolymer film for mechanochromic smart windows and its preparation method. The invention first dissolves VAc and PVE in methanol, heats under anaerobic conditions, and then initiates a polymerization reaction by continuously adding a methanol solution of AIBN. The resulting film is then formed to obtain the vinyl acetate-n-propyl vinyl ether copolymer mechanochromic film. The method of this invention is relatively simple, has high reaction safety, and is easy to scale up production. By adjusting the raw material ratio, initiator dosage, and reaction parameters, the molecular structure, molecular weight, and physical properties of the reaction products can be effectively controlled. The reaction products can be cured and molded using various methods to obtain various copolymer products with different forms of mechanochromic effects. Mechanochromic properties can be achieved without complex molding processes, which is beneficial for large-scale production and widespread application in fields such as smart windows.

The invention provides a corrosion-resistant polytetrafluoroethylene composite material, a processing method thereof and application of the corrosion-resistant polytetrafluoroethylene composite material in an air bag pump. Relates to the technical field of air bag materials. The corrosion-resistant polytetrafluoroethylene composite material comprises 90 to 110 parts of a modified PTFE matrix, 5 to 10 parts of a heat conduction reinforcing agent, 8 to 15 parts of a lubricant, 5 to 10 parts of a processing aid, 10 to 15 parts of a flexibilizer and 0.5 to 2 parts of an antioxidant, the modified PTFE matrix is obtained by modifying PTFE modified by copolymerization of perfluoro n-propyl vinyl ether, polyphenylene sulfide fibers, a 2-ureido-4 (1H)-pyrimidone derivative, a coupling agent and amino propyl heptaisobutyl silsesquioxane. The corrosion-resistant polytetrafluoroethylene composite material disclosed by the invention can be applied to an air bag material, so that the corrosion resistance, mechanical strength and wear resistance of the air bag material at high temperature are improved.

A kind of membrane coupling recovery process of fusible polytetrafluoroethylene production tail gas, by the coupling integration of unit operation such as staged compression, shallow cooling, membrane separation, low-temperature condensation, circulating rectification, the process can realize the efficient separation of tetrafluoroethylene polymerization tail gas, respectively obtain hydrogen, tetrafluoroethylene, and the mixture of octafluorocyclobutane and perfluoropropyl vinyl ether, realize the efficient use of various high-value components.The membrane coupling recovery process and system proposed in the application ensure that more than 92.8% of the polymerization tail gas enters the recovery device, wherein the effective recovery rate of tetrafluoroethylene is more than 90.0%, and the effective recovery rate of octafluorocyclobutane and perfluoropropyl vinyl ether is more than 92.0%.Taking a 10000 tons / year fusible polytetrafluoroethylene production device as an example, 516.9 tons of tetrafluoroethylene, 31.3 tons of octafluorocyclobutane and 115.6 tons of perfluoropropyl vinyl ether can be recovered per year, which greatly reduces the raw material cost of fusible polytetrafluoroethylene production device.

Provided is a fluorine-containing copolymer which is a fluorine-containing copolymer containing tetrafluoroethylene units, hexafluoropropylene units, and perfluoro(propyl vinyl ether) units, wherein the content of the hexafluoropropylene units is 7.0 to 8.5 mass% relative to the total monomer units, the content of the perfluoro(propyl vinyl ether) units is 1.5 to 2.9 mass% relative to the total monomer units, and the melt flow rate at 372°C is 9 to 15 g / 10 minutes.

The present invention provides a copolymer containing tetrafluoroethylene units and perfluoro(propyl vinyl ether) units, wherein the content of the perfluoro(propyl vinyl ether) units is 4.6% by mass to 5.2% by mass relative to all monomer units, the melt flow rate at 372 °C is 22.0 g / 10 min to 28.0 g / 10 min, and the number of functional groups is 50 or less per 10 6 main chain carbon atoms.

The invention relates to the technical field of polymer dielectric materials, in particular to a polyimide high-temperature dielectric composite film and a preparation method thereof. The preparation method comprises the following steps: mixing a fluorinated polyamic acid solution, a polyamic acid solution and a tetrafluoroethylene-perfluoropropyl vinyl ether copolymer solution, performing stirring treatment and ultrasonic treatment, then coating the upper surface of a substrate with the mixed solution subjected to ultrasonic treatment, and performing drying treatment to form an initial composite film; the preparation method comprises the following steps: preparing an initial composite film, carrying out heat treatment on the initial composite film to obtain a heat-treated composite film, and finally stripping the heat-treated composite film from a substrate to obtain the polyimide high-temperature dielectric composite film with excellent dielectric properties and excellent energy storage performance in a high-temperature environment. The preparation method is simple in process and high in applicability, provides important technical support for developing high-performance and high-stability high-temperature dielectric films, and is suitable for wide popularization and application.

The invention relates to the technical field of building coatings. The high-strength heat-preservation and heat-insulation building coating is prepared from the following raw materials in parts by weight: 80 to 100 parts of polyurethane resin, 15 to 25 parts of phenolic resin, 20 to 30 parts of water, 2 to 4 parts of perfluoropropyl vinyl ether, 8 to 10 parts of a thickening agent, 8 to 12 parts of a functional auxiliary agent, 5 to 8 parts of a cross-linking agent, 4 to 6 parts of a film-forming agent, 1.2 to 1.8 parts of an isolating agent, 0.3 to 0.6 part of a reinforcing agent and 0.2 to 0.3 part of a catalyst. After the modified aluminum silicate fiber is prepared into the dissolving solution, when the coating prepared by mixing the modified aluminum silicate fiber dissolving solution with other raw materials is coated on the surface of a building, the fiber structure can form tiny gaps and a heat insulation layer in the coating, so that heat conduction and radiation are effectively prevented; and the dispersity and the compatibility of the building coating are improved, so that the coating can be more uniformly coated on the surface of a building to form a continuous heat insulation layer, and the building coating has a relatively good heat preservation and heat insulation effect.

Provided is a double layer tube including an inner layer (A) and an outer layer (B) disposed directly on the inner layer (A), wherein the inner layer (A) comprises a copolymer (a) that comprises tetrafluoroethylene unit and perfluoro(propyl vinyl ether) unit, and the outer layer (B) comprises a polymer (b) that comprises at least chlorotrifluoroethylene unit; wherein the copolymer (a) has a rate of decrease in weight of 0.05 mass % or less after heat treatment at 380° C. for 1 hour; and wherein a ratio between a thickness of the inner layer (A) and a thickness of the outer layer (B), ((A) / (B)), is 30.0 / 70.0 to 67.0 / 33.0.

The invention discloses a PTFE expansion joint and a forming process thereof, and belongs to the technical field of expansion joint preparation, a PTFE liner tube is prepared from the following raw materials in parts by weight: 65.3 to 89.6 parts of polydopamine combined methacryloyloxyethyl trimethyl ammonium chloride modified PTFE base material, 16.5 to 22.4 parts of maleic anhydride grafted polyethylene and 3.5 to 6.7 parts of perfluoro-n-propyl vinyl ether; the preparation method of the polydopamine and methacryloyloxyethyl trimethyl ammonium chloride modified PTFE base material comprises the following steps: carrying out plasma treatment on the PTFE base material, carrying out combined modification treatment on the PTFE base material by using polydopamine and methacryloyloxyethyl trimethyl ammonium chloride, and carrying out ultraviolet irradiation treatment. Polydopamine is combined with methacryloyloxyethyl trimethyl ammonium chloride to modify a PTFE base material, maleic anhydride grafted polyethylene and perfluoro-n-propyl vinyl ether are co-extruded to prepare the PTFE liner tube, the material is uniformly dispersed, and the interface bonding force is strong; the PTFE liner tube has the advantages of small friction coefficient, small volume wear rate, high hardness, high tensile strength, high impact strength and the like.

The present invention relates to the field of flame retardants, and particularly to a modified magnesium hydroxide for high-filled materials and a preparation method thereof. The preparation method of the modified magnesium hydroxide comprises the following steps: Step 1, surface amination treatment of magnesium hydroxide particles; Step 2, reacting the aminated magnesium hydroxide particles with allyl sulfonyl chloride to obtain activated magnesium hydroxide particles; Step 3, reacting the activated magnesium hydroxide particles with hydroxypropyl vinyl ether to obtain modified magnesium hydroxide. The modified magnesium hydroxide for high-filled materials prepared by the present invention has excellent flame retardant filling properties when applied to polymer materials. Compared with traditional magnesium hydroxide fillers, it not only improves the flame retardancy of polymer materials, but also significantly enhances their mechanical strength and impact resistance.

Provided is a fluorine-containing copolymer containing tetrafluoroethylene units, hexafluoropropylene units, and perfluoro(propyl vinyl ether) units, wherein the content of the hexafluoropropylene units is 3.55 mol% to 4.10 mol% relative to the total monomer units, the content of the perfluoro(propyl vinyl ether) units is 0.39 mol% to 0.90 mol% relative to the total monomer units, and the melt flow rate at 372°C is 1.0 g / 10 minutes to 9.0 g / 10 minutes.