118 results about "Trifluoroethene" patented technology

The invention discloses moisture-proof and dust-proof epoxy paint and a preparation method thereof, and belongs to the technical field of paint. The invention discloses moisture-proof and dust-proof epoxy paint which comprises the following raw material components in parts by weight: 100 parts of high-temperature-resistant epoxy resin, 0.8-1.2 parts of a curing agent, 8-12 parts of waterproof silicon resin, 4-6 parts of a defoaming agent, 5 parts of a flatting agent, 10-15 parts of a solvent and 1-3 parts of an antistatic agent, the high-temperature-resistant epoxy resin is obtained by reacting and grafting 1-bromine-4-(trifluorovinyloxy) benzene, cardanol and phosphonitrilic chloride trimer and then performing epoxidation; the waterproof silicon resin is obtained by carrying out polycondensation on 3-glycidyl ether oxypropyl triethoxy silane and tetraethyl orthosilicate and then carrying out end capping by adopting 4-[trifluorovinyl (oxygen) phenyl] dimethylsilane.

The invention discloses a perovskite solar cell based on a cross-linked interface passivation layer, and relates to the technical field of photovoltaic cell materials. The perovskite solar cell sequentially comprises a transparent conductive substrate, an electron transport layer, a perovskite light absorption layer, a crosslinking interface passivation layer, a hole transport layer and a metal electrode from bottom to top, and the cross-linked interface passivation layer is made of a 4-[10-(4-{(1, 2, 2-trifluorovinyl) oxy} phenyl)-10H-phenoxazine-2-yl] phenylphosphonic acid material. The cross-linked interface passivation layer can significantly improve the photovoltaic performance and stability, the intrinsic stability of the device is greatly enhanced by the cross-linked network, and in a double-85 aging test of 85 DEG C / 85% RH, the time required for attenuating the efficiency of the device to 80% of an initial value can exceed 1000 hours.

The present invention relates to a solid polymer electrolyte based on poly (vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene) (PVTF), comprising: a polymer matrix; the solvent is a N, N-dimethylformamide (DMF) solvent; and lithium bis (trifluoromethanesulfonyl) imide (LiTFSI). The PVTF-based solid polymer electrolyte shows an excellent electrochemical window as high as 5.68 V, significantly higher ionic conductivity at ambient temperature of 1.91 * 10 <-3 > S cm <-1 >, and the PVTF-based solid polymer electrolyte has a glass transition temperature (Tg) of less than-38 DEG C.

Provided is a working medium for a heat cycle, including trifluoroethylene, 1,1-difluoroethane, and trifluoroiodomethane, in which a proportion of 1,1-difluoroethane with respect to a total of trifluoroethylene and 1,1-difluoroethane is 57.5% by mass or less, a proportion of trifluoroiodomethane with respect to a total of trifluoroethylene, 1,1-difluoroethane, and trifluoroiodomethane is 24.5% by mass or less, and a total proportion of trifluoroethylene, 1,1-difluoroethane, and trifluoroiodomethane with respect to the working medium for a heat cycle as a whole is 75.0% by mass or more.

A refrigerant circuit includes a compressor. Refrigerant is sealed in the refrigeration circuit. Refrigerant contains 1,1,2-trifluoroethylene and propane. A content C1 based on a mass of 1,1,2-trifluoroethylene in refrigerant is not lower than 70 mass % and not higher than 85 mass %. A content C2 based on a mass of propane in refrigerant is not lower than 15 mass % and not higher than 30 mass %.

A refrigeration circuit device comprises a refrigeration circuit with a compressor. The refrigerant is enclosed in the refrigeration circuit. The refrigerant contains a first and a second component. The first component consists of 1,1,2-trifluoroethylene. The second component consists of at least one component selected from the group consisting of hydrocarbons with a carbon number of at least 1 and at most 5 and fluorinated hydrocarbons with a carbon number of at least 1 and at most 5. The content of C1, based on the mass of the first component in the refrigerant, is at least 50% by mass. The percentage (C2 / C1) × 100 of the content of C2, based on the mass of the second component, in relation to the content of C1, based on the mass of the first component in the refrigerant, is at least 15% and less than 50%. The compressor is filled with compressor oil. The compressor oil is incompatible with the second component.

The present invention discloses a method and system for producing hexafluorobutadiene, which includes the following steps: In step (1), an organic solution of bromotrifluoroethylene and zinc powder are respectively introduced into a first reactor containing an initiator, zinc powder, and an organic solvent, followed by a second reactor, and reacted to obtain a trifluorovinylzinc bromide solution. The reaction solution is then introduced into a precipitator to separate excess zinc powder, resulting in a zinc-free trifluorovinylzinc bromide solution. The excess zinc powder is then filtered and reused. In step (2), the trifluorovinylzinc bromide solution obtained above and a pre-prepared composite catalyst solution are introduced into a third reactor and subjected to a coupling reaction to obtain crude hexafluorobutadiene. In step (3), the crude hexafluorobutadiene obtained above is purified to obtain a product with a purity of ≥ 99.9%.

The invention relates to a process for preparing a fluoropolymer in a liquid reaction medium, the process comprising the steps of:-providing a reactor containing a liquid reaction medium comprising water,-introducing into said reactor an ethylene monomer and a fluorinated monomer selected from tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE) or mixtures thereof, the invention relates to a method for producing a fluorinated surfactant, comprising the steps of:-adding a reaction medium to a reactor,-pressurizing the reactor,-feeding a redox initiator into the reactor to initiate polymerization, the redox initiator comprising an oxidizing agent and a reducing agent, where the reducing agent in the redox initiator does not contain sulfur atoms having an oxidation number of 4 or less, and where the reaction medium does not contain a fluorinated surfactant.

Provided are: a binder in which the interface resistance between a current collector and an electrode material layer in a positive electrode of a sodium ion battery is reduced and battery characteristics are improved; and an electrode mixture, an electrode, and a secondary battery using the binder. A binder for a positive electrode of a sodium ion battery, the binder containing a copolymer having a vinylidene fluoride unit (A) and a structural unit (B) derived from at least one type of monomer selected from the group consisting of trifluoroethylene, hexafluoropropylene, chlorotrifluoroethylene, a monomer represented by general formula (1), a monomer represented by general formula (2), and a monomer represented by general formula (3), and does not have a tetrafluoroethylene unit. [Formula 1] # imgabs0 # (In the formula, Rf1 is a linear or branched fluorinated alkyl group or fluorinated alkoxy group having 1-12 carbon atoms, and when both the fluorinated alkyl group and the fluorinated alkoxy group have 2 or more carbon atoms, an oxygen atom (-O-) may be included between carbon atoms. ) (In the formula, Rf2 is a linear or branched fluorinated alkyl group or fluorinated alkoxy group having 1 to 12 carbon atoms, and when both the fluorinated alkyl group and the fluorinated alkoxy group have 2 or more carbon atoms, an oxygen atom (-O-) may be included between carbon atoms. ) [chemical formula 3] # imgabs2 # (In the formula, R1, R2, and R3 are each independently a hydrogen atom, a chlorine atom, or an alkyl group having 1-5 carbon atoms. And X represents a single bond or an atomic group having a molecular weight of 500 or less and having a main chain comprising 1-20 atoms. And Y represents an inorganic cation and / or an organic cation).

Mechanically and piezoelectrically anisotropic polymer fibers may be formed by spinning a polymer solution or gel that includes a high molecular weight crystallizable polymer and a liquid solvent. The solvent may be configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the spun fibers. The polymer solution may also include a low molecular weight additive. The high and low molecular weight polymers may each be characterized by a bimodal molecular weight distribution where the molecular weight of the additive is less than the molecular weight of the crystallizable polymer. The polymer(s) and the additive(s) may be independently selected from vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, etc. The spun fibers may be oriented, annealed, poled, and woven or laminated to form a polymer thin film having a high elastic modulus and a high electromechanical coupling factor.

The invention provides novel azeotrope-like compositions and separation processes utilizing the same. An azeotrope-like composition comprising 1,2-difluoroethylene (HFO-1132) and hydrogen fluoride. An azeotrope-like composition comprising 1,1,2-trifluoroethylene (HFO-1123) and hydrogen fluoride. A separation process for a composition comprising at least one member selected from the group consisting of trans-1,2-difluoroethylene (HFO-1132(E)), cis-1,2-difluoroethylene (HFO-1132(Z)), and 1,1,2-trifluoroethylene (HFO-1123) and hydrogen fluoride.

The invention discloses a polymer proppant suitable for supercritical CO2 fracturing, a preparation method comprises the following steps: S1, modifying an inorganic monomer by using a coupling agent to obtain a modified inorganic monomer; s2, taking an organic monomer A, an organic monomer B and a modified inorganic monomer as raw materials, and preparing polymer microspheres through an emulsion polymerization method; the organic monomer A is one of methyl methacrylate, methyl acrylate or styrene; the organic monomer B is vinylidene fluoride or trifluoroethylene; and S3, putting the polymer microspheres prepared in the step S2 into a plasma reaction cavity, filling CF4 gas to carry out plasma reaction, carrying out fluorination treatment on the surfaces of the polymer microspheres, finally cooling to room temperature, and carrying out vacuum drying to obtain the polymer proppant. The polymer proppant is suitable for supercritical CO2 fracturing, through PVDF copolymerization, inorganic monomer filling and fluorination modification, the swelling resistance of the polymer is effectively enhanced, and the swelling effect induced by supercritical CO2 is resisted.

The invention discloses an environment-friendly refrigeration composition for compression refrigeration, the ODP value of the environment-friendly refrigeration composition is 0, the GWP is less than 150, and the refrigeration composition comprises hexafluoropropylene serving as a first component and accounting for 30-50% of the total mass of the refrigeration composition; the trifluoroethylene is used as a second component and accounts for 30-50% of the total mass of the refrigeration composition; the third component is selected from at least one of cyclopropane, difluoromethane or trifluoroacetyl fluoride, and the mass of the third component accounts for 10-30% of the total mass of the refrigeration composition. The refrigeration composition can replace R410A to be used for a household air conditioner or a commercial air conditioner system, parts of the air conditioner system do not need to be replaced, the environmental performance is far better than that of the R410A, and the cycle performance is equivalent to or slightly better than that of the R410A.

The present invention relates to a process for the purification of a fluorocarbon from a mixture comprising said fluorocarbon and hydrogen, said process comprising a stage of bringing said mixture into contact with a membrane M1 to form a stream F1 comprising the fluorocarbon and a stream F2 comprising the hydrogen. The present invention also relates to a process for the production of trifluoroethylene. The present invention also relates to a process for the separation of a hydrofluoroolefin or of a hydrofluoroalkane from nitrogen by membrane separation. The present invention also relates to a process for the separation of trifluoroethylene from chlorotrifluoroethylene or from a hydrofluorocarbon.

A working medium for a heat cycle includes trifluoroethylene, a low boiling point compound having a lower boiling point than the boiling point of the trifluoroethylene, and high boiling point compounds having higher boiling points than the boiling point of the trifluoroethylene. In the working medium, the low boiling point compound is at least one selected from the group consisting of carbon dioxide, R116, and R41, and the high boiling point compounds are at least two selected from the group consisting of HFC-32, HFO-1234yf, HFO-1234ze (E), HFO-1243zf, PFC-14, HFC-134, HFC-143a, HFC-227ea, cyclopropane, isobutene, isobutane, dimethyl ether, and ammonia. An application of the working medium is provided.

To provide an electrode for a Li-ion battery by a solvent-free deposition technique on a metal substrate.SOLUTION: A Li-ion battery electrode comprising an active filler for an anode or a cathode, an electronically conductive filler and a fluoropolymer binder, said binder consisting of a mixture of two fluoropolymers: a non-functional fluoropolymer A and a fluoropolymer B having at least one functionality, wherein said fluoropolymers A and B contain at least one fluoromonomer selected from vinyl fluoride; vinylidenefluoride (VDF); trifluoroethylene (VF3); chlorotrifluoroethylene (CTFE) and the like, and wherein said fluoropolymer B comprises a monomer unit having at least one carboxylic functional group.SELECTED DRAWING: None

The present invention relates to a process for producing trifluoroethylene in a reactor provided with a fixed catalytic bed comprising a catalyst, said process comprising a step a) of reacting a composition A comprising chlorotrifluoroethylene with hydrogen in the presence of a catalyst and in the gas phase to produce a stream B comprising trifluoroethylene, characterized in that said composition A also comprises at least one of the additional compounds C1 chosen from the group consisting of 1,1,1-trifluoroethane, 1,1,1,2-tetrafluoroethane, hexafluorocyclobutene, fluoroethane, 2-chloro-1,1,1-trifluoroethane, 1,2-dichlorohexafluorocyclobutane. The present invention also relates to a chlorotrifluoroethylene composition.

The present invention relates to a process for the purification of a fluorocarbon from a mixture comprising said fluorocarbon and hydrogen, said process comprising a stage of bringing said mixture into contact with a membrane M1 to form a stream F1 comprising the fluorocarbon and a stream F2 comprising the hydrogen. The present invention also relates to a process for the production of trifluoroethylene. The present invention also relates to a process for the separation of a hydrofluoroolefin or of a hydrofluoroalkane from nitrogen by membrane separation. The present invention also relates to a process for the separation of trifluoroethylene from chlorotrifluoroethylene or from a hydrofluorocarbon.

The invention discloses a polyvinylidene fluoride-trifluoroethylene piezoelectric sensor and a preparation method of the polyvinylidene fluoride-trifluoroethylene piezoelectric sensor. The sensor sequentially comprises a piezoelectric film layer, stretchable conductive electrode layers located on the two sides of the piezoelectric film layer and a flexible packaging layer on the outermost layer from inside to outside. The preparation method comprises the following steps: dissolving polyvinylidene fluoride-trifluoroethylene, gallium-indium eutectic liquid metal and a dispersant polyvinylpyrrolidone in N, N-dimethylformamide, and carrying out ultrasonic homogenization and magnetic stirring to prepare a uniform spinning solution; preparing a fiber membrane with a directional arrangement structure by utilizing an electrostatic spinning technology and a rotary drum receiving device; carrying out annealing treatment on the fiber membrane; and finally, a stretchable electrode is attached and packaged. The sensitivity of the prepared sensor can reach 0.424 V N-1 at most, the elongation at break is 150%-180%, and the sensor has cycling stability and is suitable for monitoring human motion.

Provided is a method for producing a fluoropolymer without using an emulsifier even when using a water-based medium with a small environmental load. A method for producing a fluoropolymer, wherein at least one fluoromonomer selected from the group consisting of tetrafluoroethylene, chlorotrifluoroethylene, and vinylidene fluoride is polymerized in the presence of a specific polymer containing at least one unit selected from the group consisting of a unit based on a compound represented by the following formula (1) and a unit based on a compound represented by the following formula (2) in a water-based medium to produce a fluoropolymer (wherein, in the case of polymerizing the tetrafluoroethylene, the tetrafluoroethylene is polymerized under the condition that the content of the unit based on tetrafluoroethylene in the fluoropolymer is less than 99 mass% relative to all units of the fluoropolymer). Formula (1) CXY=CR 1 -COO-(L-O) n -R 2 Formula (2) CXY=CR 3 -(O) m -CH2-Z-R 4

A method for manufacturing a non-woven separator for a lithium secondary battery, includes: (S1) preparing a first solution of β-chitin dissolved in a first solvent and a second solution of vinylidene fluoride-trifluoroethylene copolymer (PVDF-TrFE) dissolved in a second solvent; (S2) coaxial electrospinning with the first solution as a core solution and the second solution as a shell solution to produce a non-woven fabric formed of a fiber with a core-shell structure having a core portion of the β-chitin and a shell portion of the vinylidene fluoride-trifluoroethylene copolymer; and (S3) performing heat treatment on the non-woven fabric at a temperature lower than a thermal decomposition point of the β-chitin and higher than a melting point of the vinylidene fluoride-trifluoroethylene copolymer to melt and recrystallize the vinylidene fluoride-trifluoroethylene copolymer.

The present invention relates to a process for producing trifluoroethylene in a reactor equipped with a fixed catalytic bed comprising a catalyst, said process comprising a step a) of reacting a composition A comprising chlorotrifluoroethylene with hydrogen in the presence of a catalyst and in the gas phase in order to produce a stream B comprising trifluoroethylene, characterized in that said composition A also comprises at least one of the additional compounds C1 chosen from the group consisting of 1,1,1-trifluoroethane, 1,1,1,2-tetrafluoroethane, hexafluorocyclobutene, fluoroethane, 2-chloro-1,1,1-trifluoroethane and 1,2-dichlorohexafluorocyclobutane. The present invention also relates to a chlorotrifluoroethylene composition.

The invention discloses a preparation method of a poly (vinylidene fluoride-trifluoroethylene) electrostatic spinning piezoelectric film. The preparation method comprises the following steps: annealing and regulating the content of oriented amorphous components of a poly (vinylidene fluoride-trifluoroethylene) film; the content of an oriented amorphous region in the piezoelectric film after annealing treatment is greatly increased; the remanent polarization is improved by increasing the content of the oriented amorphous region. According to the electrostatic spinning piezoelectric film, poly (vinylidene fluoride-trifluoroethylene) serves as an object, lamellar crystal orientation and defects are induced through a drawing force field generated under the electrostatic spinning technology, generation of oriented amorphous components of different structures is promoted in limited lamellar crystals in cooperation with later annealing treatment, and the electrostatic spinning piezoelectric film with the high piezoelectric performance is obtained.

This invention discloses a moisture-proof and dust-proof epoxy paint and its preparation method, belonging to the field of coating technology. The moisture-proof and dust-proof epoxy paint disclosed in this invention, by weight, comprises the following raw material components: 100 parts by weight of high-temperature resistant epoxy resin, 0.8-1.2 parts by weight of curing agent, 8-12 parts by weight of waterproof silicone resin, 4-6 parts by weight of defoamer, 5 parts by weight of leveling agent, 10-15 parts by weight of solvent, and 1-3 parts by weight of antistatic agent. The high-temperature resistant epoxy resin is obtained by epoxidation after grafting 1-bromo-4-(trifluorovinyloxy)benzene, cashew nut shell powder, and hexachlorocyclotriphosphazene. The waterproof silicone resin is obtained by polycondensation of 3-glycidyl etheroxypropyltriethoxysilane and tetraethyl orthosilicate followed by end-capping with 4-[trifluorovinyl(oxy)phenyl]dimethylsilane.

A working medium for heat cycles, which contains trifluoroethylene, 1, 1-difluoroethane, and trifluoroiodomethane, and wherein the ratio of 1, 1-difluoroethane to the total of trifluoroethylene and 1, 1-difluoroethane is 57.5 mass% or less, and the ratio of trifluoroiodomethane to trifluoroethylene, 1, 1-difluoroethane to the total of trifluoroethylene and 1, 1-difluoroethane is 57.5 mass% or less, and the ratio of trifluoroiodomethane to the total of trifluoroethylene and 1, 1-difluoroethane is 57.5 mass% or less. The ratio of the total of trifluoroethylene, 1, 1-difluoroethane and trifluoroiodomethane is 24.5 mass% or less, and the ratio of the total of trifluoroethylene, 1, 1-difluoroethane and trifluoroiodomethane is 75.0 mass% or more relative to the entire working medium for heat cycles.

The present invention relates to a binder composition for a sulfide-based solid electrolyte comprising: a binder including a repeating unit derived from vinylidene fluoride, a repeating unit derived from trifluoroethylene, and a repeating unit derived from chlorotrifluoroethylene; and a non-aqueous solvent.

The invention discloses a preparation process of high-crosslinking high-elasticity modified rubber for an aerator, and relates to the technical field of modified rubber.The preparation process comprises the steps that 1, p-nitrophenoxy trifluorovinyl ether is synthesized; (2) carrying out thermal cyclization dimerization to prepare 1, 3-bis (4-nitrophenoxy) perfluorocyclobutane; (3) reducing nitryl to prepare 1, 3-bis (4-aminophenoxy) perfluorocyclobutane; 4) epoxidizing nitrile rubber; 5) cross-linking modification; the perfluorocyclobutane rigid diamine cross-linking agent is synthesized and is subjected to amine-epoxy reaction with epoxidized nitrile rubber to form a three-dimensional network formed by firm covalent bonds and inert fluorocarbon nodes, so that the rubber has high elasticity, extremely low permanent deformation, excellent aging resistance and super-long service life; and the core problems that the aerator is easy to age and the performance attenuation is fast in a severe environment are solved.

The present invention relates to a refrigerant composition for an air conditioning device, which has characteristics similar to those of R410A, has a sufficiently low global warming potential (GWP), and contains trifluoroethylene and trifluoroiodomethane.