72 results about "Fluoroelastomer" patented technology

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 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 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.

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.

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.

The invention discloses fluororubber resistant to high-temperature water vapor and a preparation method thereof, and belongs to the technical field of fluororubber, and the fluororubber resistant to high-temperature water vapor is obtained by mixing rare earth hybrid fluororubber raw rubber on an open mill and adding an auxiliary agent for vulcanization; the rare earth hybridized fluororubber raw rubber is prepared from fluororubber emulsion and a modified rare earth complex solution. The modified rare earth complex solution is prepared by mixing a modified methacrylic acid solution and a rare earth salt solution; the preparation process of the modified methacrylic acid solution comprises the following steps: adding glycidyl methacrylate into methacrylic acid, adding a catalyst and a polymerization inhibitor to form a mixture A, and under the protection of nitrogen, carrying out heating reaction and reduced pressure distillation on the mixture A to obtain the modified methacrylic acid. Through the manner, the fluororubber with excellent mechanical properties, high-temperature aging resistance, high-temperature water vapor resistance and the like can be prepared.

1. Name of the design product: watchband (fluorine rubber). 2. Use of the design product: watchband for watch. 3. Design points of the design product: in shape. 4. Picture or photo that best shows the design points: reference to figure 1 in use. 5. Other components that need to be explained: the design product is a component design, component 1 and component 2 are two parts of the watchband respectively.

The invention discloses a modified polyethylene composite packaging film with release property and hydrophobic and oleophobic properties, which is characterized in that the packaging film comprises a functional layer made of a modified polyethylene material, and the modified polyethylene material comprises the following components in percentage by weight: 75-92% of polyethylene, 3-15% of a low-surface-energy functional component, 1-5% of an antioxidant, 1-5% of a lubricant and 1-5% of a lubricant. The low-surface-energy functional component is selected from organic silicon resin or fluorine-containing elastomer, and the nano reinforcing component accounts for 2-10%, so that the problem of long production period is solved. According to the technical scheme, the modified polyethylene composite packaging film has release property and hydrophobic and oleophobic properties. According to the invention, a one-step melt blending film blowing molding method is adopted, so that an independent coating process is omitted; meanwhile, a preferable scheme of a solvent-free adhesive is provided in a compounding link, a plurality of steps of coating, drying, curing and the like are omitted, and a function endowing process is integrated into a conventional film blowing process, so that the production process is greatly simplified, and the production period is shortened.

The present invention provides a molded article having high flexural modulus, excellent heat resistance and low-temperature impact resistance, and a resin composition from which the molded article can be obtained. The resin composition comprises a polyarylene ether ketone and a fluorine-containing elastomer and an inorganic filler, the proportion of the fluorine-containing elastomer to the total of the volume of the polyarylene ether ketone and the volume of the fluorine-containing elastomer is 1 to 45% by volume, the proportion of the inorganic filler is 1 to 50% by mass, and the load deflection temperature under a load of 1.82 MPa based on ASTM D648 is higher than that of a comparative composition, and a molded article of the resin composition. The comparative composition is a resin composition comprising a polyarylene ether ketone and a fluorine-containing elastomer but not containing an inorganic filler, the type of the polyarylene ether ketone, the type of the fluorine-containing elastomer and the volume proportion of the fluorine-containing elastomer to the total of the volume of the polyarylene ether ketone and the volume of the fluorine-containing elastomer are all the same as those of the resin composition except for the presence or absence of the inorganic filler.

An airtight member with a fluoroelastomer seal and a manufacturing method thereof are disclosed. The fluoroelastomer seal is formed and bonded to a base surface of a main body of the airtight member by hot pressing. The main body of the airtight member is held by a main mold. A pre-pressed fluoroelastomer material is pressurized by a forming cavity of a forming mold and heated to form the fluoroelastomer seal bonded to the base surface. The airtight member and the fluoroelastomer seal are combined to form an integrated structure, which is beneficial for assembly and disassembly and has good sealing effect.

The invention discloses a PTFE composite emulsion, a PTFE prepreg, a copper-clad plate and a preparation method of the PTFE composite emulsion, the PTFE prepreg and the copper-clad plate, the PTFE composite emulsion is a composite emulsion obtained from a PTFE resin matrix and modified fluorine-containing elastomer micro powder, and the modified fluorine-containing elastomer micro powder contains carboxyl or / and hydroxyl active groups. The inherent defects that PTFE is extremely low in heat conductivity coefficient, poor in bonding performance with the copper foil and poor in processing fluidity are overcome, and the limitation that the comprehensive performance cannot be balanced through an existing modification technology is overcome.

Disclosed are a perfluoropolyether functionalized in a fluorinated chain, a preparation method therefor and a use thereof, and a modified perfluoroelastomer. The perfluoropolyether has a structure as shown in formula (I): formula (I); in formula (I), A and B are each independently selected from a substituted or unsubstituted ester group; Rf is a perfluoropolyether segment; X1 and X2 are each independently hydroxyl, a fluorine element, or fluorinated alkyl; Y is a halogen or a hydrogen atom; and C is a carbon atom. The perfluoropolyether functionalized in the fluorinated chain has excellent thermal stability, and the functionalized perfluoropolyether can be self-crosslinked, or compounded and crosslinked with a fluoroelastomer, a perfluoroelastomer, a fluorosilicone rubber, or a non-fluoroelastomer to finally obtain a product having low-temperature performance and thermal stability.

A novel rubber composition for manufacturing a sealing material having predetermined plasma resistance and predetermined hardness is provided, a fluorinated elastomer formed by crosslinking the rubber composition, and a sealing material containing the fluorinated elastomer. The problem can be solved by a rubber composition comprising (a) a crosslinking reactive fluororubber, (b) a crosslinking reactive perfluororubber, (c) a fluorinated oligomer with a perfluoro backbone, and (d) a fluororesin.

A tetrafluoroethylene-propylene copolymer with a solidification point monomer is mixed with a five-membered copolymer of vinylidene fluoride (VDF), hexafluoropropylene (HFP), tetrafluoroethylene (TFE), perfluorinated methyl vinyl ether (PMVE), and ethylene (PE), using a peroxide as an initiator and an aid TAIC as a crosslinking agent, and the resulting co-solidified fluoroelastomer shows improved curing performance, improved mechanical properties, and improved compression set. The co-solidified fluoroelastomer shows improved chemical resistance to solvent aging systems, and better retention of mechanical properties after high temperature aging in solvent systems.

Provided is a method for producing a fluorine-containing elastomer with which it is possible to efficiently produce a fluorine-containing polymer having excellent water dispersion stability without requiring an emulsifier even when an aqueous medium having a small environmental burden is used. A method for producing a fluorine-containing elastomer in which a monomer containing TFE and PAVE is polymerized in an aqueous dispersion that does not substantially contain a water-soluble emulsifier and that contains a first fluorine-containing polymer containing TFE units and PAVE units and an aqueous medium to produce a second fluorine-containing polymer, in which the TFE units and the PAVE units are separated from each other, and in which the TFE units and the PAVE units are separated from each other, the second fluorine-containing polymer is produced by polymerizing a monomer containing TFE and PAVE in an aqueous dispersion that does not substantially contain a water-soluble emulsifier. In the first fluorine-containing polymer, the amount of the PAVE unit is 20-95 mol% relative to the total amount of the TFE unit and the PAVE unit, in the second fluorine-containing polymer, the amount of the PAVE unit is 20-95 mol% relative to the total amount of the TFE unit and the PAVE unit, and the content of the first fluorine-containing polymer is 0.01-4.0 mass% relative to the total mass of the aqueous dispersion before the polymerization of the monomers is started.

The present invention comprises a new class of high and low phosphonated aliphatic fluoropolymer rubbers (pFKM) and perfluoropolymer rubbers (pFFKM) based on FKM and FFKM, as well as methods for their preparation and their uses.

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 (A1) that is other than a perfluoroelastomer and has a fluorine content of 69% by mass or more and a crosslinkable fluoroelastomer (A2) that is other than a perfluoroelastomer and has a fluorine content in a range of 55 to 68% by mass, and a content of the fluoroelastomer (A1) is 60 to 95% by mass based on 100% by mass of the total of the fluoroelastomers (A1) and (A2).