111 results about "Fluoroelastomer" patented technology

The invention provides a metal plate frame and fluororubber sealing assembly and a preparation method thereof, and the preparation method is applied to the technical field of semiconductor sealing and comprises the steps that S1, a metal plate frame is coated with an adhesive, dried and then cooled, and the adhesive is a trithiocyanuric acid derivative solution; s2, a cross-linking agent and an addition agent are added in the thin-passing mixing process of the perfluoroether elastomer, a mixed rubber compound is obtained, the addition agent comprises fluorinated silicon dioxide, fluorinated titanium dioxide or PFA micro powder, and the mass of the addition agent is 2-10% of the mass of the perfluoroether elastomer; and S3, the mixed rubber sheet is placed in a metal plate frame, the metal plate frame with the mixed rubber sheet is placed in a mold to be subjected to hot pressing vulcanization forming, then secondary vulcanization is conducted, then radiation vulcanization is conducted, and the assembly is obtained. The assembly prepared through the method is resistant to plasma etching and high in cleanliness, the bonding performance of the perfluoroether rubber and the metal plate frame is good, and the rate of finished products is high.

The invention discloses a flame-retardant cable and a preparation method thereof. The cable comprises conductor wire cores, a fireproof layer, an insulating layer, a shielding layer, a filling layer and a sheath layer from inside to outside. According to the cable sheath layer, 100 parts of high density polyethylene (HDPE), 5-15 parts of ethylene-vinyl acetate rubber and 3-10 parts of fluororubber are used as main materials, triallyl isocyanurate and bisphenol A diallyl ether are introduced for synergistic crosslinking, and nano montmorillonite is used as an auxiliary material, so that a compact interpenetrating network is constructed. The tensile strength of the sheath layer composite material is greater than or equal to 26.5 MPa, the elongation at break is greater than or equal to 387%, the performance retention rate is greater than 92% after the sheath layer composite material is soaked in slurry for 28 days, the limit oxygen index is greater than 38%, the water vapor transmission coefficient is less than or equal to 1.5 * 10 <-4 > g.mm / (m < 2 >. D.Pa), and the sheath layer composite material has excellent flame retardance, barrier property and slurry resistance and is suitable for harsh outdoor environments such as rail transit.

Provided is a fluoroelastomer composition comprising a fluoroelastomer (a), a cross-linking agent (b), and an organic acid (c), wherein the organic acid (c) is at least one selected from the group consisting of an organic acid having 3 to 10 carbon atoms and having one acid group in a molecule, and an organic acid having 2 to 10 carbon atoms and having two or more acid groups in a molecule.

The invention belongs to the technical field of sports equipment, and particularly relates to a modified polyethylene anaerobic biodegradable material as well as a preparation method and application thereof. Comprising the following components in parts by weight: 70-100 parts of polyethylene, 0-5 parts of probiotic anaerobic degradable plastic master batch, 0-5 parts of anaerobic enzyme accelerant, 5-15 parts of ethylene-vinyl acetate copolymer, 1-15 parts of corn starch, 0.1-5 parts of compatibilizer, 0.01-0.06 part of fluoroelastomer, 2-8 parts of coupling agent and 1-5 parts of dispersing agent. According to the invention, polyethylene is used as a matrix, and through directional modification of a degradation trigger and synergistic enhancement of a trace of functional aids, the controllable anaerobic biodegradation capability is given to polyethylene for the first time on the premise of retaining excellent processability and mechanical properties of polyethylene, and the long-standing technical bottleneck that performance and environmental protection cannot be achieved at the same time in the field of sports equipment is broken through; and an industrialization feasible path is provided for green upgrading of sports equipment.

An apparatus for use in applying TTFields includes an electrode subassembly. The electrode subassembly includes at least one electrode element having a skin-facing side and a skin-facing surface and a dielectric layer on the skin-facing side of the at least one electrode element. The dielectric layer includes at least one fluoroelastomer. The electrode subassembly includes a skin-facing surface and the dielectric layer provides the skin-facing surface of the electrode subassembly. A skin contact subassembly is coupled to the electrode subassembly. The skin contact subassembly includes a skin contact conductive adhesive or gel configured to contact skin of a subject. The skin contact conductive adhesive or gel is electrically coupled to the at least one electrode element when the skin contact subassembly is disposed against the skin-facing surface of the electrode subassembly. The skin contact subassembly is releasably coupled to the electrode subassembly.

The present disclosure provides a conductive diaphragm and a speaker using same. The conductive diaphragm includes a main portion made of polymer material and a conductive portion located on the main portion. The conductive portion includes a substrate with a film layer and conductive material dispersed in the substrate, the film layer is solidified from at least one material of thermoplastic elastomer, phenyl silicone, isoprene rubber, or fluoroelastomer. Compared with the related technologies, the conductive diaphragm disclosed by the present disclosure has excellent atigue-resistant property and could maintain good adhesive strength and toughness.

The present invention relates to a solid composite electrolyte comprising a) at least one fluoroelastomer and b) at least one sulfide-based solid ionic conducting inorganic particles that differs from a lithium salt, wherein a) the fluoroelastomer comprises recurring units derived from i) vinylidene difluorides and ii) from 15.0 to 80.0 mol % of at least one C2-C8 chloro and / or bromo and / or iodo fluoroolefin, the mol % being relative to the total moles of recurring units, wherein the solid composite electrolyte does not contain a lithium salt; to a slurry for manufacturing a solid composite electrolyte comprising a) a fluoroelastomer and b) a sulfide-based solid ionic conducting inorganic particle that differs from a lithium salt, and c) at least one non-aqueous solvent, wherein the slurry does not contain a lithium salt; and to a solid-state battery comprising a positive electrode, a negative electrode and a membrane, at least one among which comprises a solid composite electrolyte according to the present invention. The present invention also relates to a binder solution for a solid-state battery comprising a) at least one fluoroelastomer and c) at least one non-aqueous solvent.

The present invention relates to a novel fluoroelastomer and to a curable composition comprising the fluoroelastomer and at least one curing agent. The present invention also relates to a method for manufacturing a shaped article comprising curing the curable composition and to cured articles obtainable from the composition.

Provided is a method for producing an aqueous dispersion of a fluorine-containing elastomer by polymerizing a fluorine-containing monomer in the presence of an aqueous medium and a polymerization initiator to produce an aqueous dispersion containing the fluorine-containing elastomer, wherein the amount of generated radicals is adjusted.

Provided is a method for producing a fluorine-containing elastomer aqueous dispersion, which polymerizes a fluorine-containing monomer in the presence of a compound (1) having an aromatic ring, a hydrophilic group, and an unsaturated double bond, and an aqueous medium, thereby producing an aqueous dispersion of a fluorine-containing elastomer having -CH2- in the main chain.

The invention relates to a curable fluoroelastomer composition having low swelling tendency, comprising: A) a curable fluoroelastomer; B) a curing system; and C) 0.1 wt.-% to 30 wt.-% of a nitrogen-containing polymer, selected from polyimide, polyimide, mixtures and / or copolymers thereof, each relative to the total weight of fluoroelastomer and nitrogen-containing polymer, the nitrogen-containing polymer being present in particulate form of an average particle size in the range of 0.15 to 70 μm and / or in fiber form having an average fiber diameter in the range of 0.15 to 70 μm.

To provide a manufacturing method that enables the production of an aqueous dispersion containing a fluorine-containing elastomer with excellent crosslinking properties, even when surfactants are not used during polymerization, with high productivity. [Solution] In a method for producing an aqueous dispersion of a fluorine-containing elastomer, which is produced by polymerizing a fluorine-containing monomer in the presence of an aqueous medium and a polymerization initiator, the present invention provides a method for adjusting the amount of radicals generated.

The present disclosure provides a thermoplastic polymer composition comprising a fluororesin (A), a crosslinked fluoroelastomer (B), and magnesium oxide (C), wherein the fluororesin (A) is a copolymer that contains ethylene unit and tetrafluoroethylene unit; wherein the crosslinked fluoroelastomer (B) is obtained by subjecting a fluoroelastomer (b) to a dynamic crosslinking treatment in the presence of the fluororesin (A), the magnesium oxide (C), and a cross-linking agent (D) under conditions for melting the fluororesin (A); wherein the magnesium oxide (C) has a volume-based 10% particle size of 1.0 μm or less; and wherein a mass ratio between the fluororesin (A) and the crosslinked fluoroelastomer (B) ((A) / (B)) is 50 / 50 to 95 / 5.

A combustion head assembly for a burner that reduces combustion byproduct and oil pooling on a flame ring stabilizer or air diffuser element during normal operational cycling. The polymeric bushing directs away or prevents a non-combusted fuel in the fuel line interior portion from the nozzle end after a combustion cycle, and is fabricated from a polymeric material having thermal / electrical insulating properties, which is resistant to decomposition, dissolution, or breakdown when exposed to No. 2 fuel oil, biodiesel fuel oil, such as fluoropolymers, including PTFE (Teflon), fluorinated ethylene propylene (FEP), perfluoroalkoxy (PFA), ethylene-based fluoropolymers (ETFE / ECTFE), and / or polyvinylidene fluoride (PVDF), polyether ether ketones (PEEK), polyphenylene sulfide (PPS), and / or fluoroelastomers (FKM), or acrylonitrile butadiene styrene (ABS). The polymeric bushing is situated within a fuel line interior portion behind a nozzle element, having a channel or bore extending from end to end and in fluid communication with the nozzle element opening.

To provide a method for producing fluorine-containing elastomers that efficiently manufactures fluorine-containing polymers with excellent water dispersion stability without requiring emulsifiers, while using an environmentally friendly aqueous medium. [Solution] A method for producing a fluorine-containing elastomer, comprising polymerizing monomers containing TFE and PAVE in an aqueous dispersion containing a first fluorine-containing polymer containing TFE units and PAVE units, which is substantially free of water-soluble emulsifiers, and an aqueous medium, to produce a second fluorine-containing polymer, wherein the PAVE units in the first fluorine-containing polymer are 20 to 95 mol% of the total TFE units and PAVE units, the PAVE units in the second fluorine-containing polymer are 20 to 95 mol% of the total TFE units and PAVE units, and the content of the first fluorine-containing polymer before starting monomer polymerization is 0.01 to 4.0% by mass of the total mass of the aqueous dispersion.

The invention discloses a corrosion-resistant composite material for an industrial ton bag and a preparation method of the corrosion-resistant composite material. The preparation method of the composite material comprises the following steps: firstly, carrying out plasma activation treatment on polypropylene fibers to improve the surface activity of the polypropylene fibers, then immersing the polypropylene fibers into a graphene oxide dispersion liquid, carrying out drying and heat setting to form a graphene reinforced support layer, and then carrying out plasma etching through carbon tetrafluoride and oxygen to construct a micro-nano dual-scale structure on the surfaces of the fibers so as to obtain the graphene reinforced composite material. And finally, performing high-pressure emulsification on fluorinated polyolefin emulsion containing polyethylene, fluoroelastomer, nano silicon dioxide and the like, blade-coating the surface of the fiber with the emulsified fluorinated polyolefin emulsion, and performing hot-pressing compounding. Through multi-layer synergistic modification, the mass change rate of the composite material in a strong acid and strong alkali environment is lower than 1%, the strength retention rate exceeds 89% after ultraviolet aging for 500 h, the peel strength reaches 8.2 N / 25 mm, the composite material has excellent corrosion resistance, aging resistance and interface bonding force, and the service life of the ton bag in a severe environment is effectively prolonged.

Provided are a composite that can be suitably used as an electrolyte in polymer-based solid-state batteries, and various electrochemical devices using the composite. The composite includes a fluorine-containing elastomer and an alkali metal salt as essential components, wherein the fluorine-containing elastomer is an amorphous fluorine-containing elastomer having a glass transition temperature of 25° C. or less, and the composite has a volatile content of 0.1 mass % or less with respect to the entire composite.

The application relates to the technical field of fluorine materials, and discloses a liquid fluorine elastomer as well as a preparation method and application thereof. The liquid fluorine elastomer is obtained by mixing and reacting a fluorine-containing elastomer solution, magnesium oxide and an alcohol amine; wherein the fluorine-containing elastomer is free of side hydroxyl groups. The preparation method has the characteristics of less by-products, simplicity, controllability, high yield and the like. The high-functionality low-molecular-weight liquid fluorine elastomer of the application contains side hydroxyl groups, and the preferred example can also contain terminal carboxyl groups or terminal hydroxyl groups, has high functionality and good reactivity, and is crosslinked with a polyisocyanate compound to be solidified. The solidified product has excellent mechanical properties and chemical medium resistance, and can be used to prepare special adhesives, sealants and coatings.

The present invention provides a resin composition from which a molded body having excellent stress cracking resistance is obtained, the resin composition having excellent moldability, a molded body obtained by molding the resin composition, a composite body having the molded body, and use applications thereof. A resin composition of the present invention comprises a polyarylene sulfide resin A and a fluorine-containing elastomer B having a terminal functional group, in which a volume ratio of the polyarylene sulfide resin A to the fluorine-containing elastomer B is 99:1 to 50:50, the fluorine-containing elastomer B is dispersed in the polyarylene sulfide resin A, and the average dispersed particle diameter of the fluorine-containing elastomer B is less than 10 µm.

The invention provides a fluororubber sealing element applied to a high-temperature dynamic sealing environment and a preparation method of the fluororubber sealing element, and relates to the field of fluororubber preparation. A vinylidene fluoride / tetrafluoroethylene / perfluoromethyl vinyl ether ternary fluoroelastomer is used as a main body material, carbon black is added, and PFA micro powder activated by a plasma etching machine is used as filler; oxygen-containing groups can be introduced after plasma treatment, the interface bonding effect of the PFA and the fluororubber can be improved, meanwhile, the surface energy of the activated PFA can be closer to that of the fluororubber, a nanoscale rough structure can be generated on the surface of the PFA due to etching, the material bonding strength is improved, the sealing performance and the thermal durability are improved, and the layering risk at the high temperature can be inhibited through strong interface bonding; according to the invention, perfluoropolyether oil (PFPE) is added, and 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane (bis (penta)), octadecylamine, zinc oxide and a graphene derivative are matched, so that the high-temperature-resistant hot-tear-resistant sealing element is prepared.

The present application relates to the technical field of high polymer compound composition, and discloses a kind of fluorine-containing rubber's rat bite prevention termite cable sheath material composition, comprising vinylidene fluoride base fluorine-containing rubber matrix and modified mesoporous calcium fluoride powder, by filling repellent component to mesoporous calcium fluoride carrier nanopore, and in orifice enrichment accelerator and on surface grafting functional group preparation, accelerator induces local crosslinking of matrix in carrier orifice when composition vulcanization, form dense crosslinking layer, the present application utilizes dense crosslinking layer to physically lock repellent component at room temperature, and with temperature increase adjustment network gap realizes controlled permeation, solve fluorine-containing rubber matrix small molecule additive blooming problem, maintain long-term biological repellent efficiency, and synergistically enhance the fatigue resistance of sheath material.

Disclosed is a multi-layer fuel return line hose, comprised of an innermost layer made of PFAS free Fluoro elastomer (FKM), an intermediate layer crafted from Epichlorohydrin (ECO) rubber, and an outermost reinforcement layer consisting of polyester spun yarn braiding. The hose is uniquely designed to withstand fuel compositions and endure pressures of up to 70 BAR. Notably, considerations are provided for the specific construction design, adhesion strength between the predefined layers, application pressure considerations, resistance to extreme environmental conditions, and resistance to pressure-induced shrinkage or expansion. A method for manufacturing such a multi-layered hose, as well as a nozzle-integrated fuel return line hose assembly, have also been detailed.

A fluorine-containing elastomer including a vinylidene fluoride unit and an unsaturated ether unit selected from a unit based on a monomer (1) represented by the general formula (1): CH2═CFCF2—O—Rf1 and a unit based on a monomer (2) represented by the general formula (2): CH2═CF—O—Rf2, and having a glass transition temperature of 20° C. or lower, a crosslinkable composition including the fluorine-containing elastomer, and a molded article obtained from the fluorine-containing elastomer or the crosslinkable composition.

An embodiment of the present application relates to a sealing material or a method for producing a sealing material, the sealing material being a radiation crosslinked body of an elastomer composition containing a crosslinkable fluorine-containing elastomer (A) other than a perfluoroelastomer, a crosslinking agent, and a crosslinking coagent, wherein the crosslinkable fluorine-containing elastomer (A) contains a crosslinkable fluorine-containing elastomer (A1) other than a perfluoroelastomer having a fluorine content in the range of 66 to 68 mass%.

The invention pertains to a fluoroelastomer composition comprising one or more fluoroelastomer (A) comprising recurring units derived from tetrafluoroethylene (TFE) in an amount of from 40% to 69%, recurring units derived from one or more perfluoro alkyl-vinyl ether (PAVE) in an amount of from 30 to 59% by moles, recurring units derived from cure-site containing monomers having at least a nitrile group (CS-N) in an amount below 1,5% by moles, and one or more curing agent (B) comprising a cation and an anion of formula: An q -Qp n+ wherein m, n, p, and q are positive integers, wherein m * p = n * q, wherein Qn+ is a cation, and Aq- is an anion according to the formula (I), wherein each R independently is H, halo, alkyl, aryl, aralkyl, or cycloalkyl, and which also may be halogenated, fluorinated, or perfluorinated, wherein two or more of R and R' groups may together form a ring, wherein each R group independently may contain one or more heteroatom(s), wherein R' can be the same as R, with the proviso that R' cannot be halo. The composition of the invention is able to provide for cured parts having ability to retain outstanding sealing performances at very high temperatures. The invention also relates to a method of curing the same and to cured articles obtained therefrom, which are useful as sealing parts in semi-conductors industry.

An embodiment of the present invention relates to a bonded object or a method for manufacturing a bonded object, the bonded object having bases bonded therein while placing an adhesive layer in between, the adhesive layer being obtained from a fluororubber composition that contains at least one fluororubber selected from fluoroelastomer (FKM) and perfluoroelastomer (FFKM), and has a Mooney viscosity (ML 1+10) at 121° C., measured in accordance with ASTM D1646, of 80 to 115.

The invention relates to a method for producing fluoroelastomers via emulsion polymerization in the absence of fluorinated surfactants and in the presence of one or more polycarboxylic acids having 2 to 22 carbon atoms. The invention also relates to aqueous fluoroelastomer latices and fluoroelastomers, which can be obtained by the process.

The invention belongs to the technical field of sealing elements, and particularly relates to a fluorine-containing elastomer toughened crystalline fluorine-containing polymer and a sealing element application thereof. The fluorine-containing elastomer toughened crystalline fluorine-containing polymer comprises the following raw materials: an uncrosslinked fluorine-containing elastomer, a crystalline fluorine-containing polymer and a cross-linking agent, the mass ratio of the uncrosslinked fluorine-containing elastomer to the crystalline fluorine-containing polymer to the cross-linking agent is 100: (30-400): (1-3), and the fluorine content of the fluorine-containing elastomer is greater than 50%. According to the fluorine-containing elastomer toughening crystal type fluorine-containing polymer, the ESC sealing element formed on the basis of the fluorine-containing elastomer toughening crystal type fluorine-containing polymer not only has the elasticity of rubber, but also has the etching gas resistance of fluorine-containing plastic, and meanwhile, the ESC sealing element is convenient to operate on site.

One embodiment of the present invention relates to an elastomer composition, a sealing material, or a method for producing a sealing material, in which the elastomer composition includes a crosslinkable fluoroelastomer (A) [provided that the elastomer (A) is a compound having no hydrosilyl group] and a composition (B) that contains at least one ethylenically unsaturated bond-containing compound selected from compounds having a perfluoro skeleton having an ethylenically unsaturated bond [provided that the compounds are compounds other than the elastomer (A)] and compounds having a siloxane skeleton having an ethylenically unsaturated bond, the composition (B) having a minimum torque (ML) at 60° C. of 0.5 kgf·cm or more as measured with a CURELASTOMETER.