824 results about "Fluoropolymer" patented technology

The invention belongs to the technical field of polymer composite materials, and particularly relates to an oil-resistant interior material. The material comprises a porous base material layer, a fluorine-containing polymer and organic silicon resin blended oil-resistant functional layer and a micro-nano structure layer with a periodic micro-bulge array, surface modified nanoparticles are distributed in the functional layer in a gradient manner, and the micro-bulge surface is covered with a perfluoropolyether / fluorinated silicon dioxide composite coating; through a synergistic effect of a low-surface-energy oleophobic interface formed through chemical bonding and curing and a micro-structure capillary lifting effect, anti-permeation barrier of high-viscosity grease is realized, and meanwhile, mechanical wear resistance and thermal stability are improved by virtue of a nano-particle enhanced cross-linked network; and continuous imprinting and an ultraviolet-thermal dual-curing process are combined to achieve high-efficiency manufacturing with zero solvent residue, and finally the interior material with long-acting oil resistance, high environmental tolerance and industrial mass production feasibility is obtained.

The invention relates to the technical field of electric wires and cables, and discloses a fluoroplastic insulating high-temperature-resistant fireproof cable and a preparation method thereof.The cable comprises a conductor layer, the conductor layer is formed by twisting multiple strands of copper wires, the periphery of the conductor layer is coated with a fluoroplastic insulating layer, the periphery of the fluoroplastic insulating layer is coated with a shielding layer, and the shielding layer is arranged on the periphery of the conductor layer. The shielding layer is of a copper strip braided structure, the periphery of the shielding layer is coated with an armor layer, the armor layer is braided by stainless steel wires, the periphery of the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in parts by mass: 50-70 parts of functionalized ethylene-tetrafluoroethylene copolymer. According to the invention, an interpenetrating polymer network formed by in-situ crosslinking of the functionalized fluoropolymer and the organosilicon elastomer is constructed in the sheath layer, and an energy field gradient response vulcanization process is adopted, so that the prepared cable sheath maintains the inherent high temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved at the same time.

The application discloses a method for preparing a low-viscosity vinyl fluorine-containing hyperbranched silicone resin and belongs to the technical field of organic polymer materials. The low-viscosity vinyl fluorine-containing hyperbranched silicone resin is prepared from a vinyl-containing siloxane monomer, an alkyl-containing siloxane monomer and a fluorine-containing siloxane monomer as raw materials through hydrolysis nucleation, condensation growth, end capping and purification treatment, wherein the vinyl content is not less than 3 wt%, the fluorine content is not less than 15 wt% and the viscosity is not higher than 1000 mPa.s. The vinyl fluorine-containing hyperbranched silicone resin has excellent properties of both a vinyl silicone resin and a fluorine-containing polymer, the existence of the vinyl group can be suitable for various reaction conditions, the existence of the fluorine-containing group makes the hydrophobic and oleophobic properties excellent, and the friction coefficient of the fluorine-containing polymer material is small, so that the vinyl fluorine-containing hyperbranched silicone resin has great application potential in the fields of oil-resistant sealing, anticorrosion coating, electronic materials, medical devices and the like.

Processing aids and lubricants with free acid groups and relatively high molecular weights are used as process aids in the formation of extrudates and other molded materials. The compositions of this invention can be used as defined, or can be used with prior art processing aids, depending on the end use application. The novel materials and process provide a useful alternative to the sole use of fluorine-based polymer processing aids.

To provide a golf tee having a friction with a golf ball as small as possible without generating unevenness in a contact portion with the golf ball in a placement part of the golf ball, and a manufacturing method of the golf tee.SOLUTION: In a state where a center part in a placement part 120 having a concave curved surface shape on which a golf ball 200 is placed is opened, a cover part 130 formed of a fluorine-containing polymer such as polytetrafluoroethylene is joined so as to cover an upper side peripheral edge of the placement part 120 via an adhesive layer 132.SELECTED DRAWING: Figure 1

The invention provides a battery monomer, a battery device and a power utilization device. The battery monomer comprises a laminated electrode assembly and an electrolyte, the laminated electrode assembly comprises a positive pole piece, an isolating membrane and a negative pole piece which are arranged in a laminated manner, the isolating membrane comprises a base membrane and coatings arranged on two sides of the base membrane, each coating comprises a bonding layer, the bonding layer is a continuous layer with a porous structure, and the electrolyte is arranged between the positive pole piece and the negative pole piece. The bonding layer comprises a fluorine-containing polymer; the electrolyte comprises chain carbonate, and based on the total mass of the electrolyte, the mass content of the chain carbonate is 43%-71%. The battery monomer has relatively high energy density and also has a good cycle performance.

The invention concerns a composition comprising a fluoropolymer, a silicon-sulfur compound, a vinyl polymer consisting in carbon and hydrogen atoms, and optionally oxygen and / or nitrogen atoms, and a solvent or a mixture of solvents and methods for the preparation thereof and for preparing a coated substrate by applying said composition.

The invention relates to a solid electrolyte membrane and a preparation method thereof, and belongs to the technical field of lithium battery solid electrolyte. According to the invention, after the selected acrylate monomer as shown in the formula I is polymerized, the crystallinity of the fluorine-containing polymer is reduced, more space is provided for ion conduction, the dissociation effect of the lithium salt is enhanced, and the free ion concentration is increased; the precipitation-method white carbon black limits anion movement through abundant hydroxyl groups, so that the lithium ion transference number is increased; under the combined action of the three factors, the ionic conductivity of the solid electrolyte membrane is greatly improved. The fluorine-containing polymer has good toughness and self-supporting effect and wide electrochemical window and thermal stability, so that the application range of the solid electrolyte and the energy density, rate capability and service life of a battery using the electrolyte are improved on the whole.

A polymer processing aid (PPA) reduces melt defects in extruded polyolefins in the absence of fluoropolymers. A polymer processing aid comprising a block copolymer having polyamide blocks and polyether blocks reduces melt defects well in a thermoplastic polyolefin such as a linear low density polyethylene (LLDPE). Inclusion of an adjuvant PPA comprised of polycaprolactone, or polycaprolactone diol polymer further improves the melt fracture behavior in a thermoplastic and in the absence of fluoropolymers.

The invention provides a medical device comprising a fluoropolymer surface comprising at least one hyaluronic acid species.

The invention relates to the technical field of copper-clad plate preparation, in particular to a preparation method of a high-frequency flexible copper-clad plate. The preparation method comprises the following steps: taking a mixture of a trifluorochlor oethylene-vinyl ether fluororesin emulsion and a tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer emulsion as a fluorine-containing emulsion matrix, then adding isopropanol polycarbonate to prepare a composite emulsion, coating two surfaces of a PI film with the composite emulsion to prepare a fluorine-containing polymer layer, and finally preparing the fluorine-containing polymer layer. The fluorine-containing polymer layer has an interface bonding effect, the modified PTFE layer has the effects of reducing dielectric loss and enhancing stability, and the fluorine-containing polymer layer and the modified PTFE layer have a synergistic effect, so that the high-frequency flexible copper-clad plate is prepared. Therefore, the prepared high-frequency copper-clad plate has excellent high-frequency dielectric property, high-strength interface bonding property and excellent mechanical and dimensional stability.

The invention relates to a fluoropolymer coating composition that can be used, for example, in coating electrodes and / or separators in electrochemical devices. The fluoropolymer coating composition preferably contains multiple fluoropolymer phases. The coated electrodes and / or separators have both excellent wet adhesion, excellent dry adhesion, and low leachables. Each of the fluoropolymer phases contains polymers having at least 10 weight percent, of a common fluoromonomer, making the polymer phases compatible with each other, and allowing for the phases to be distributed fairly homogeneously on a macroscopic level throughout the composition and dried coating formed from the composition.

The invention discloses a silicon-based negative electrode material and a preparation method thereof, a negative electrode plate and a preparation method thereof, a solid-state battery and an electric device, and relates to the technical field of batteries, the silicon-based negative electrode material comprises a silicon-based active substance, a fluorine-containing composite binder and a conductive agent, the fluorine-containing composite binder comprises a fluorine-containing copolymer and a fluorine-containing polymer; the fluorine content of the fluorine-containing copolymer is greater than or equal to 60%; and the elastic modulus of the fluorine-containing composite binder is 1.0 to 1.2 GPa. The fluorine content of the fluorine-containing copolymer is greater than or equal to 60%, and the fluorine-containing copolymer and F <-> in the electrolyte form a compact interface layer, so that electrolyte permeation can be inhibited, and the interface stability is improved. The elastic modulus of the fluorine-containing composite binder is 1.0-1.2 GPa, the fluorine-containing composite binder is matched with the expansion stress of the silicon-based active material, elastic buffer can be provided for the silicon-based negative electrode material, the expansion stress of the silicon-based negative electrode can be uniformly dispersed by forming a three-dimensional elastic cross-linked network, the generation of cracks is reduced, the fracture of a transmission channel is reduced, and the ion transmission performance is improved.

The invention concerns a monolayer comprising a fluoropolymer, a silicon-sulfur compound, and a vinyl polymer consisting in carbon and hydrogen atoms, and optionally oxygen and / or nitrogen atoms, an assembly comprising a substrate and said monolayer, a method for preparing said monolayer, a component comprising said monolayer and a device comprising said component.

The invention relates to a negative electrode slurry and a preparation method thereof, a negative plate and a lithium ion battery, the negative electrode slurry mainly comprises a negative electrode active material, a binder composition, a conductive agent and a negative electrode additive, the mass ratio of the binder composition to the negative electrode additive is 2.0-2.4: 1.0-2.0, the binder composition comprises a component A, a component B and a component C, the component A is a fluorine-containing polymer, the component C is a fluorine-containing polymer, and the component B is a fluorine-containing polymer. The component B comprises a carboxylic acid compound, the component C is carboxymethyl cellulose salt, the negative electrode additive is alkali metal fluoride salt and / or alkaline earth metal fluoride salt, the pH value of the negative electrode slurry is 6.5-7.5, and the viscosity of the negative electrode slurry is 1000-4000 mpas. The negative electrode slurry disclosed by the invention has good dispersity and stability, and the prepared negative electrode plate can effectively relieve volume expansion of silicon, so that the rate capability, the cycling stability, the coulombic efficiency and the battery safety of the lithium ion battery can be effectively improved, and the consistency of the lithium ion battery is improved.

A disclosed positive electrode is a positive electrode for a nonaqueous electrolyte secondary battery. The positive electrode includes a positive electrode current collector and a positive electrode mixture layer disposed on the positive electrode current collector. The positive electrode mixture layer contains active material particles having an average particle diameter less than 5 μm, a conductive material, a dispersant, and a binder. The active material particles include composite oxide particles and a surface modification layer formed on surfaces of the composite oxide particles and containing a boron compound. The composite oxide particles are particles of a lithium transition metal composite oxide. The conductive material includes a carbon material. The dispersant includes nitrile group-containing rubber. The binder includes a fluorine-containing polymer.

The invention relates to the technical field of batteries, and particularly discloses a composite current collector and a preparation method and application thereof. The composite current collector comprises a thin film substrate, and a phosphorus-containing monomer is introduced into the surface of the thin film substrate through plasma treatment; an aluminum conductive layer disposed on at least one side surface of the film substrate; the surface functional layer is arranged on the surface of one side, far away from the thin film substrate, of the aluminum conducting layer, and the surface functional layer comprises a fluorine-containing polymer layer and a nanotube composite layer which are sequentially arranged from inside to outside. Phosphorus-containing monomers (phosphoric acid groups and ester derivatives thereof) are introduced to a film substrate, oxygen atoms or hydroxyl groups in key functional groups of the phosphoric acid groups and the ester derivatives thereof interact with metal ions strongly to form coordinate bonds to enhance the interface bonding force between an aluminum conductive layer and a PET film, and a surface functional layer is combined to block electrolyte permeation, so that the film has a good anti-corrosion effect. And the nanotubes in the surface functional layer form a three-dimensional conductive network, so that the contact resistance is reduced, and the conductivity is enhanced.

The utility model belongs to the field of diaphragm valves, and particularly relates to an integrated dual-drive controlled fluorine-lined diaphragm valve which comprises a valve body, a valve rod is arranged on the surface of the valve body in a penetrating mode, an operation assembly is arranged at the top of the valve rod, one side of the valve body is fixedly communicated with a connecting pipe, a movable pipe is arranged in an inner cavity of the connecting pipe, and the movable pipe is connected with the valve rod. The right side of the moving pipe extends to the right side of the connecting pipe and is fixedly sleeved with a connecting disc. The operation assembly comprises a rotating box, the bottom of the rotating box is fixedly connected with the valve rod, the top of the rotating box is fixedly connected with a hand wheel, and the surface of the rotating box is sleeved with a fixing shell; by arranging the operation assembly, the inserting rod can be inserted into the inserting hole to fix the rotating box, limiting of the valve rod is achieved, the stability of the valve rod is improved, the valve rod is prevented from rotating, by arranging the adjusting assembly, the using length of the whole valve body can be prolonged by adjusting the moving pipe, and the requirements for different installation space lengths can be met.

The patent discloses a chemical wastewater environmental protection purification device containing fluoropolymers, and belongs to the technical field of wastewater treatment. The chemical wastewater environmental protection purification device containing fluoropolymers comprises a base, an impurity treatment device is assembled at the top right end of the base, the impurity treatment device comprises a device shell, the device shell is fixedly connected to the top of the base, a pneumatic device is assembled on the outer side of the device shell, cavities A and B are formed in the device shell, impurity removal assemblies A are assembled in the cavities A and B, and cavities C and D are formed below the impurity treatment device. The impurity removal assemblies A and the pneumatic device are matched with each other, the motor drives the stirring rod, the rotating plate and the adsorption assembly to realize the sufficient mixing of the wastewater and the flocculant and the diffusion of impurities, the water level and the air flow are automatically controlled through the pneumatic device, the automation degree of the equipment is significantly improved, and the manual intervention demand is reduced.

The present invention provides a fluorine-containing polymer comprising tetrafluoroethylene units (1) and a fluorine-containing polymer derived from the general formula (2): CF2=CF(CF2) n The monomer unit (2) of the perfluorodiene shown in CF=CF2 (where n represents an integer from 2 to 10) has a content of tetrafluoroethylene unit (1) of 98.0 mol% to 99.999 mol% or more relative to all monomer units constituting the fluoropolymer, and a content of monomer unit (2) of 0.001 mol% to 2.0 mol% relative to all monomer units constituting the fluoropolymer.

The present invention relates to coating compositions that can be applied to the surface of a substrate to form a durable, non-stick coating. The coating compositions can include a basecoat composition and a topcoat composition for forming a basecoat and a topcoat applied over the basecoat. The basecoat can include one of an organic polymer, a sol-gel composition, and a silicone resin. The basecoat composition and the resulting basecoat can further include reinforcing particles. The topcoat can include a siloxane matrix formed from one of a hydrosilylation reaction, a dehydrocoupling reaction, and a polycondensation reaction. The basecoat and the topcoat can each be substantially free of a fluoropolymer component.

A cartridge for a vapour generating system such as an e-cigarette includes a layer of mesh disposed across the airflow path, wherein at least a surface of the mesh includes a water-repellent material. The mesh permits the flow of air along the airflow path, while resisting the passage of condensed vapour-generating liquid that might leak from either the air inlet or air outlet. The water-repellent material may be a surface coating of a fluoropolymer such as PTFE or a ceramic nano-coating. Preferably the mesh has an average pore size less than 30 μm. The mesh may be a generally planar sheet supported in a prefabricated cartridge closure assembly, which also defines the air inlet.

To provide a production method by which a fluoropolymer substantially free from dimers and trimers of a monomer constituting a polymer used in polymerization of a fluoromonomer can be produced.SOLUTION: A method for producing a fluoropolymer includes polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1) to obtain a fluoropolymer, where the polymer (1) is a polymer of a monomer (1) represented by the general formula (1) defined by CF2=CF-R-CZ1Z2-A0 (where R is a linking group; Z1 and Z2 are each independently F or CF3; and A0 is an anionic group), in which the content of a dimer and a trimer of the monomer (1) is 1.0 mass% or less based on the polymer (1).SELECTED DRAWING: None

Provided is a method for producing particles containing a fluorine-containing polymer, said method being capable of producing particles containing a fluorine-containing polymer having a low content of impurities. This method for producing particles containing a fluorine-containing polymer is a method for producing particles containing a fluorine-containing polymer having a group capable of being converted into an ion exchange group, said method comprising preparing a liquid composition containing a fluorine-containing polymer and a first solvent, then mixing the liquid composition with a second solvent, and aggregating the fluorine-containing polymer, thereby producing particles containing a fluorine-containing polymer having a group capable of being converted into an ion exchange group. The first solvent is an olefin having a fluorine atom and a chlorine atom, and the second solvent is an olefin having a fluorine atom and a chlorine atom.

The invention is applicable to the field of optical lens coating, and provides a processing and preparation method for improving static pressure resistance of an optical lens after AR coating, based on cooperation of coating equipment and a film layer structure, the processing and preparation method comprises the following steps: S1, equipment preparation and environment construction; s2, activating the surface of the product; s3, depositing a silicon oxide layer; s4, constructing an antireflection layer; s5, preparing a compression-resistant film; in the invention, the anti-static pressure performance is greatly improved: a microcrack repairing mechanism and fluorine-containing polymer molecules of the compression-resistant film can permeate and fill microcracks generated due to stress concentration in the deposition process of the antireflection layer, so that the defect density of the film layer is reduced from 10 / cm in the traditional process to 10 / cm or below, and the anti-static pressure performance of the glass substrate is greatly improved by cooperating with the'hard support 'of the glass substrate and the antireflection layer. The bending strength of the lens before being plated with the AR film is 600 MPa or above, the bending strength is only about 300 MPa if the lens is not plated with the anti-static film, and the bending strength is increased to 600 MPa or above after the lens is plated with the anti-compression film.

The application provides a high-flexibility dielectric positive electrode binder and a preparation method thereof and a solid-state battery positive electrode. The high-flexibility dielectric positive electrode binder comprises a fluoropolymer matrix and a fast ion conductor; the fluoropolymer matrix is a copolymer of vinylidene fluoride (VDF) and a fluorine-containing comonomer, the fast ion conductor is in a one-dimensional nanowire shape and is dispersed in the fluoropolymer matrix; and the mass fraction of the fast ion conductor is 1% to 20% based on the fluoropolymer matrix. The application can simultaneously solve three core problems of physical continuity of an ion conduction path in the positive electrode, inhibition of a space charge layer at an interface and mechanical coating of active particles, thereby significantly improving the rate performance, cycle stability and actual energy density of the solid-state battery.

The invention relates to the technical field of wires and cables, and discloses a complex electromagnetic interference resistant, bending resistant, flame retardant and fire resistant control cable. The cable sequentially comprises a composite functional conductor, a flame-retardant fire-resistant insulating layer, a fire-resistant wrapping layer, a composite shielding layer, a low-smoke halogen-free flame-retardant inner sheath, a flexible reinforced shielding layer and a low-smoke halogen-free flame-retardant outer sheath from inside to outside, and the composite shielding layer comprises a metal wire woven shielding layer and a metal belt wrapping shielding layer; the composite functional conductor comprises a conductive metal wire and a functional metal wire; the material of the flame-retardant fire-resistant insulating layer comprises a fluoropolymer material containing an inorganic ceramic filler; the flexible reinforced shielding layer comprises a metal conductive component and high-elasticity fibers; according to the invention, through conductor functional design, fire-resistant mechanism cooperation and multi-layer shielding structure optimization, stable work of the control cable in a complex electromagnetic environment, dynamic bending and fire working conditions is realized.

Provided is a fluorine-containing polymer having repeating units derived from (A) a fluorine-containing monomer and (B) a radically polymerizable monomer having no functional group, in which the fluorine-containing monomer (A) is a compound represented by formula CH2 = C (-X11)-C (= O)-Y11-Y12-RA [in the formula, each symbol is as defined in the description].

The invention discloses a high-performance fluorine-containing plastic processing aid. The aid comprises the following components in parts by mass: 90-100 parts of a resin matrix; 0.5 to 5 parts of a fluorine-containing polymer; 1-5 parts of a plasticizer; 0.5 to 3 parts of a lubricant; 0.05 to 0.2 part of an antioxidant; when the fluorine-containing plastic processing aid is added in plastic production, melt fracture can be effectively inhibited, the surface smoothness of a product can be improved, the dispersity of the aid and the compatibility of a matrix can be improved, the processing performance uniformity can be improved, the oxidation resistance of a material can be enhanced, the service life of the product can be prolonged, and the crystal structure can be improved; the mechanical property and the dimensional stability of the product are improved, and the forming processing energy consumption and cost can be obviously reduced.

This invention discloses an enhanced long-life proton exchange membrane for hydrogen production via water electrolysis and its preparation method. The enhanced long-life proton exchange membrane for hydrogen production via water electrolysis comprises: a reinforcing material composed of ion exchange fibers, wherein the ion exchange fibers are made of a fluoropolymer with sulfonic acid groups on the side chains; a perfluorosulfonic acid resin, which forms a film on the reinforcing material for gas barrier and proton conduction; and a free radical quencher mixed in the perfluorosulfonic acid resin to capture generated free radicals and improve membrane durability. The thickness of the proton exchange membrane is 50-100 μm. The enhanced long-life proton exchange membrane for hydrogen production via water electrolysis prepared by this invention not only has good conductivity, hydrogen permeability, tensile strength, and water content, but also exhibits better dimensional stability and superior durability.