29 results about "Propyl vinyl ether" patented technology

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 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 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 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.

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.

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.

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.

The invention belongs to the technical field of organic fluorine fine chemicals, and particularly relates to a preparation method of perfluoro-n-propyl vinyl ether. The preparation method comprises the following steps: continuously adding a certain amount of hexafluoropropylene oxide dimer into a reaction system at normal temperature in a fully dehydrated organic ether solvent by taking dry carbonate as a salt-forming agent and organic amine and / or metal salt as a catalyst, and carrying out salt-forming reaction at proper stirring speed and temperature after charging is completed; after the salt is fully formed, raising the temperature in the kettle, and introducing nitrogen to carry out decarboxylation reaction, so as to obtain a perfluoro-n-propyl vinyl ether product. The method provided by the invention has the advantages that the product yield is high, the decarboxylation time is short, the content of impurity perfluoroisopropyl vinyl ether is low, no solvent is taken out in the decarboxylation process, and the like; meanwhile, the method is simple in process and equipment, easy to operate, low in decarboxylation temperature, low in energy consumption and suitable for large-scale industrial production.

The application discloses synthesis of a bio-based vinyl laurate vinyl ether copolymer. The synthesis method of the bio-based vinyl laurate vinyl ether copolymer comprises the following steps: mixing a first monomer and a second monomer, adding an initiator and a solvent, and performing solution polymerization to generate a bio-based copolymer; the first monomer is vinyl laurate; and the second monomer comprises n-propyl vinyl ether. In the application, the bio-based vinyl laurate is a rigid unit, the n-propyl vinyl ether regulates the rigidity and flexibility of a molecular chain and reduces the viscosity of a system, an addition polymerization reaction is realized through solution polymerization, and a bio-based vinyl laurate / n-propyl vinyl ether copolymer is prepared through a heat curing process; TG testing shows that the thermal decomposition temperature of the polymer is above 310 DEG C, indicating that the polymer has good high-temperature resistance.

A copolymer containing tetrafluoroethylene unit and perfluoro (propyl vinyl ether) unit, wherein the copolymer has a content of perfluoro (propyl vinyl ether) unit of 3.5 to 4.2% by mass with respect to the whole of the monomer units, a melt flow rate at 372° C. of 18.0 to 22.0 g / 10 min, and the number of functional groups of 50 or less per 106 main-chain carbon atoms.

The invention relates to a preparation method of perfluoro-n-propyl vinyl ether, which comprises the following steps: reacting hexafluoropropylene oxide with potassium fluoride to obtain potassium perfluoropropoxide; the preparation method comprises the following steps: reacting potassium perfluoropropoxide with tetrafluoroethylene to obtain the perfluoro-n-propyl vinyl ether. According to the preparation method of the perfluoro-n-propyl vinyl ether, generation of by-products is effectively reduced, the purity and the yield of the product are remarkably improved, the production cost is reduced, and the economic benefit is improved; by-products generated in the reaction process are few in variety and easy to separate, the post-treatment process is simple, complicated rectification and purification steps are not needed, the production procedures and time are reduced, and meanwhile, the problems of product loss and environmental pollution caused by the post-treatment process are also reduced; in addition, the reaction conditions are mild, the requirements on reaction equipment are reduced, the equipment investment and operation cost are reduced, meanwhile, the safety and stability of the production process are also improved, and large-scale industrial production is facilitated.

The application discloses a green preparation process of fusible polytetrafluoroethylene and relates to the field of fluorine-containing polymers. The specific process is as follows: deoxygenated high-purity water, perfluoropropyl vinyl ether, an ionic liquid and a chain transfer agent are added into a polymerization kettle with an agitator and a temperature control system, the oxygen content in the kettle is controlled, the polymerization kettle is heated, tetrafluoroethylene monomers are introduced until the reaction pressure is reached, an initiator is added, the temperature and pressure are kept constant during the reaction, and after the polymerization reaction is completed, the emulsion is washed and dried to obtain fusible polytetrafluoroethylene resin. The method proposes an ionic solution as an emulsifier and a stabilizer, the process route is green and environment-friendly, and the resin has stable and excellent performance.

Provided is a double-layer tube provided with an inner layer (A) and an outer layer (B) provided directly on the inner layer (A), the inner layer (A) containing a copolymer (a) containing a tetrafluoroethylene unit and a perfluoro (propyl vinyl ether) unit, and the outer layer (B) containing a polymer (b) containing at least a chlorotrifluoroethylene unit, the weight loss rate of the copolymer (a) after heat treatment at 380 DEG C for 1 hour is 0.05 mass% or less, and the ratio ((A) / (B)) of the thickness of the inner layer (A) to the thickness of the outer layer (B) is 30.0 / 70.0-67.0 / 33.0.

This invention relates to a non-stick coating for articles, the non-stick coating having at least one adhesion promoter layer (V) disposed on the surface of the article and a cover layer (D) disposed on the adhesion promoter layer, wherein the adhesion promoter layer has a dry film thickness of 5 to 25 μm, and wherein the cover layer has a dry film thickness of 10 to 65 μm. To achieve a combination of non-stick effect and improved abrasion resistance, it is suggested that the cover layer contains 95 to 100% by weight of PTFE and, if necessary, no more than 5% by weight of pigment, based on the total solids content of the cover layer, and is free of fluoropolymers capable of melt processing, and that the PTFE contained comprises 1 to 100% by weight of a polymerically modified PTFE, the modified PTFE comprising less than 1% by weight of perfluoropropyl vinyl ether (PPVE) as a comonomer acting as a modifier and obtained by emulsion polymerization. In a method for applying a non-stick coating, an adhesive layer in liquid form is applied as a first aqueous dispersion to the surface of an article and then thermally dried. A cover layer in the form of a second aqueous dispersion is then applied, and the layers are interconnected and bonded to the surface of the article by subsequent drying and sintering. The second dispersion does not contain fluoropolymers that can be melt-processed and does not contain low-molecular-weight PTFE.

A copolymer containing a tetrafluoroethylene unit, and a perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of the perfluoro(propyl vinyl ether) unit of 3.4 to 3.9% by mass with respect to the whole of the monomer units, and a melt flow rate of 29 to 36 g / 10 min, and the number of functional groups of —CF═CF2, —CF2H, —COF, —COOH, —COOCH3, —CONH2 and —CH2OH of more than 50 per 106 main-chain carbon atoms. Also disclosed is a sealing tool, an injection molded article, a member to be compressed including the copolymer, and a coated electric wire including a coating layer containing the copolymer.

This invention provides a fluorinated copolymer containing tetrafluoroethylene units, hexafluoropropylene units, and perfluoro(propyl vinyl ether) units, wherein the content of hexafluoropropylene units is 5.0 to 7.0% by mass relative to all monomer units, the content of perfluoro(propyl vinyl ether) units is 1.5% to 2.6% by mass relative to all monomer units, and the melt flow rate at 372°C is 9 g / 10 min to 40 g / 10 min.