151 results about "Fluoroelastomer" patented technology

A fluoroelastomer production method including a step in which monomers A comprising a compound represented by CX1X2=CX3-L-Z, a cyano-group-containing monomer, and at least one compound selected from the group consisting of tetrafluoroethylene, fluorine-containing vinyl ethers, and fluorine-containing allyl ethers are polymerized in an aqueous medium under conditions that substantially no fluorine-atom-containing emulsifier is present.

The invention relates to an oil-resistant and corrosion-resistant cable sheath material for a robot as well as a preparation method and application thereof. The oil-resistant and corrosion-resistant cable sheath material is particularly suitable for harsh environments such as underwater robots. According to the cable material, ultra-high molecular weight polypropylene, nitrile rubber, a fluorine-containing elastomer, a compatilizer, a filler and the like are used as main raw materials, and the ratio and performance of all the components are optimized, so that the oil resistance, acid and alkali corrosion resistance, salt penetration resistance and wear resistance of the cable material are remarkably improved, and meanwhile, the mechanical properties such as high tensile strength and elongation at break are maintained. According to the invention, the EPDM-g-MAH, the EPDM-g-MMA or the EPDM-g-GMA is selected as the compatilizer, so that the problem of compatibility between the polypropylene and the nitrile rubber is effectively solved. In addition, montmorillonite and talcum powder in a specific particle size range are adopted as a filler combination, so that the performance of the cable material is further optimized. The cable sheath material has remarkable advantages in the aspects of oil resistance, corrosion resistance, salt resistance and the like, the stability of the cable sheath material in severe environments is improved, and the cable sheath material is suitable for harsh environments such as underwater robots.

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.

The invention discloses a high-temperature-resistant nylon composite material and a production process thereof, and belongs to the technical field of nylon composite material preparation. The high-temperature-resistant nylon composite material is prepared from the following components in parts by weight: 35-48 parts of nylon resin, 7-12 parts of a heat-resistant agent, 3-8 parts of a modified anticorrosive agent, 1-3 parts of calcium stearate, 1-3 parts of a flame retardant and 2-10 parts of glass fibers, and the heat-resistant agent is prepared from 2, 4-dinitrophenol, hydrazine hydrate, p-nitrobenzoic acid, triethylamine, polyphosphoric acid and 2, 4-dinitrophenol. The nylon composite material is prepared from 2, 2 '-bis (3, 4-dicarboxylic acid) hexafluoropropane dianhydride, and the modified anticorrosive agent is prepared from fluororubber, benzyltriethylammonium chloride, lithium aluminum hydride and isophorone diisocyanate. The nylon composite material prepared by the method has excellent high temperature resistance and corrosion resistance.

The present invention relates to a method for manufacturing fluoroelastomers having iodinated / brominated chain ends, in emulsion polymerization whereas no addition of fluorosurfactants or hydrogenated surfactants is required. The resulting elastomer provides for cured articles having improved c-set and low polydispersity.

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.

Provided is a crosslinkable composition including a fluoroelastomer and a solid solution of aluminum oxide and magnesium oxide.

The invention discloses a device and a method for producing peroxide vulcanized fluororubber, belongs to the technical field of production of peroxide vulcanized fluororubber, and aims to solve the problem that a material adsorbed on the inner wall of an internal mixing box cannot be internally mixed, so that the mix proportion is unbalanced. A production device of peroxide vulcanized fluororubber comprises a workbench, a supporting rod and a heating box, the supporting rod and the heating box are fixedly installed on the workbench, and under cooperation of a second telescopic air cylinder, a baffle, a protection cover, a conveying opening and an internal mixing box, the whole internal mixing box is in a closed state; under the cooperation of a driving motor, a first rotating shaft, a second rotating shaft, a gear, a rotor and a heating box, materials are internally mixed, under the cooperation of a controller, an electromagnet, a magnet, a vibrating plate, a first sliding groove and a first spring, a large amount of materials adsorbed on the vibrating plate are bounced to the rotor, and the situation that the powdery materials are reduced, and consequently the mixing ratio is unbalanced is avoided; therefore, the quality of the mixed fluororubber cannot reach the factory standard, and the waste of materials is indirectly avoided.

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.

Anti-slip components are made from a polymeric composition that comprises a fluoroelastomer doped with a transition metal ceramic. The fluoroelastomer has excellent chemical resistance and thermal resistance, and the transition metal ceramic increases the static coefficient of friction for the polymeric composition. The anti-slip components are especially suitable for material handling systems that may be exposed to harsh environments in a photolithographic patterning system.

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.

A crosslinkable elastomer composition including a crosslinkable elastomer and a surface-oxidized non-oxide ceramic. Also disclosed is a fluoroelastomer molded article having a weight reduction percentage of 2.5% by mass or less and an amount of particles generated of 0.05% by mass or less after O2 plasma irradiation, a weight reduction percentage of 1.8% by mass or less, an amount of particles generated of 0.05% by mass or less after NF3 plasma irradiation, and a compression set of 50% or less after aging at 300° C. for 70 hours.

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.

The present invention provides a uniquely designed crosslinking system for fluoroelastomers, which a bisphenol free, safe crosslinking system for fluoroelastomers comprising the components: a) a phase transfer catalyst selected from quaternary ammonium or phosphonium salt; b) a non-bisphenol curative agent; c) a dispersing agent; d) a processing aid; and e) at least one additive. Said uniquely designed crosslinking system shall be useful in making commercially available fluoroelastomers / fluoropolymers exhibiting high thermal, chemical, ageing and weather resistance, excellent inertness to solvents, hydrocarbons, acids and alkalis, low dielectric constants, low flammability, low refractive index, low surface energy and low moisture absorption.

Fluoroelastomer compounds containing a particular type of carbon black are disclosed, along with cured articles formed from these compounds. These compounds show numerous characteristics useful for cured fluoroelastomer articles.

A curable fluoroelastomer composition comprises a curable fluoroelastomer, a dehydrohalogenating agent, an acid acceptor comprising bismuth oxide present in the curable fluoroelastomer composition in an amount of at least 3 parts per hundred parts by weight of the curable fluoroelastomer, and at least one silicon-containing chemical present in the curable fluoroelastomer composition in an amount of at least 0.2 parts per hundred parts by weight of the curable fluoroelastomer. A cured fluoroelastomer cured from the curable fluoroelastomer composition has a static coefficient of friction and a dynamic coefficient of friction of less than 1.

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.

To provide: a new rubber composition for producing a fluorine-containing elastomer having well-balanced characteristics; and a sealing material including a fluorine-containing elastomer.SOLUTION: A rubber composition is provided which includes (a) crosslinking reactive fluorine rubber, (b) crosslinking reactive perfluoro rubber, (c) a fluorine oligomer having a perfluoro skeleton, and (d) a composition represented by the following expression (d-1). In the formula, A is a single bond, -O-, -S-, a hetero atom-containing group, a linear or branched alkylene group, a cycloalkylene group or an arylene group, and in these groups, R1, R2, R3 and R4 are each independently H, F, an alkyl group, a fluoroalkyl group or an aryl group. At least one of R1, R2 and R3 is a fluorine atom or a group including a fluorine atom. m is an integer of 1 to 5. n is an integer of 1 to 5.SELECTED DRAWING: None

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.