696 results about "Chlorotrifluoroethylene" patented technology

Porous polymeric membranes including Halar (poly (ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The membranes may be in the form of a hollow fibre or flat sheet, and may include other agents to modify the properties of the membrane, such as the hydrophilic/hydrophobic balance. Leachable agents may also be incorporated into the membranes.

In accordance with at least selected embodiments, new or improved ceramic coated separators, membranes, films, or the like for use in lithium batteries, new or improved batteries including such ceramic coated separators, membranes, films, or the like, and methods of making or using such ceramic coated separators, membranes, films or the like are disclosed. In accordance with at least certain embodiments, new or improved aqueous or water-based polymeric coated separators, membranes, films, or the like are disclosed. In accordance with at least particular embodiments, new or improved aqueous or water-based polyvinylidene fluoride (PVDF) or polyvinylidene difluoride (PVDF) homopolymer or co-polymers of PVDF with hexafluoropropylene (HFP or [—CF(CF₃)—CF₂—]), chlorotrifluoroethylene (CTFE), vinylidene fluoride (VF₂.HFP), tetrafluoroethylene (TFE), and/or the like, blends and/or mixtures thereof, coated separators, membranes, films or the like, new or improved porous separators for use in lithium batteries, new or improved coating or application methods for applying a coating or ceramic coating to a separator for use in a lithium battery, new or improved PVDF or PVDF:HFP films or membranes, and/or the like are disclosed.

A method of making a curable fluoroelastomer is disclosed. The method comprises the steps ofpreemulsifying at least one perfluorovinylether in water, andcopolymerizing the preemulsified perfluorovinylether with a gaseous fluorinated monomer in the presence of a cure site monomer. The method provides a fluoroelastomer having a glass transition temperature of less than -10° C. Also disclosed is a fluoroelastomer that consists essentially of a perfluorovinylether of formula (I) as defined below, a cure site component, perfluoromethylvinylether, and tetrafluoroethylene and/or chlorotrifluoroethylene.

The invention relates to a high-temperature resistant PTC electroconductive composition, which comprises 20 to 70 percent of organic polymers, 25 to 75 percent of electroconductive filler, 1 to 30 percent of inorganic filler and 0.1 to 10 percent of additive, wherein the preferred melting point of the organic polymers is more than 150 DEG C; the organic polymers are one or more crystalline or semi-crystalline polymers and made of one or more of nylon 11, nylon 12, polyvinylidene fluoride, soluble poly(tetrafluoroethylene), ethylene-tetrafluoroethylene copolymers, perfluoroethylene-propylene, ethylene-chlorotrifluoroethylene and copolymers thereof. The invention also provides a high-temperature resistant PTC device containing the composition and a manufacturing method thereof. The high-temperature resistant PTC device containing the composition has low resistance, high PTC strength and superior resistance stability, so that the high-temperature resistant PTC device can be used for overcurrent protection of circuits in high-temperature environments such as automobile motors and the like. Moreover, the high-temperature resistant PTC device is simple and convenient to manufacture and has high efficiency.

A process for preparing hydrofluoroether features the reaction between one of trifluoroethene, tetrafluoroethene, hexafluoro propene, etc and one of trifluoroethanol, trifluoropropanol, metanol, etc in organic solvent (DMF or DMSO). Its advantages are high output rate and easy purifying and separating.

The invention relates to a thermosetting fluorocarbon resin and the coating thereof. The copolymerization chain segment of the resin comprises chlorotrifluoroethylene of 45.0-55.0mol percent, vinyl-acetic ester of 28.0-37.0mol percent, vinyl versatate of 4.0-10.0mol percent, hydroxyl vinyl ether of 10.0-14.0mol percent and aliphatic olefine acid of 0-0.6mol percent. The fluorocarbon coating mainly comprises the following components with certain weight percentage, thermosetting fluorocarbon resin of 20.0-40.0 percent, cross-linking agent of 0-15.0 percent, paint of 0-35.0 percent, promoter of 0.15-1.5 percent and mixed solvent of 30.0-60.0 percent. The fluorocarbon coating adopts no acid catalyst, has stable properties in storage, has excellent softness, methyl ethyl ketone wiping resistance and aging resistance, etc., and is applicable for rolling coating of metal rolling material.

A composition containing a non-flammable chlorofluoro-olefin copolymer having a crystallinity index less than about 10% and a weight-average molecular weight greater than about 1,000,000 daltons, wherein the copolymer has at least two comonomer units of the formula:wherein each X is independently selected from H, Cl and F; Y is selected from H, Cl, F, O(CZ2)nCZ3, (CZ2)nCZ3, (OCZ2CZ2)nCZ3 and (O(CZ2)n)nCZ3, wherein each n is independently from about 1 to about 12 and each Z is independently selected from H, Cl and F; and A is selected from H, Cl and F, provided that for at least one comonomer unit, at least one of A, Y, either X or any Z is Cl. Substrates coated with the copolymer compositions are also disclosed.

The invention discloses a dust removal and waste gas decomposition double-effect filter material and a preparation method thereof. The filter material comprises a raw felt, catalyst powder and a coating. The filter material utilizes the raw felt as a carrier, the catalyst powder is adhered to the inside of the raw felt, and the coating is coated on the surface of the raw felt and is of a polytrifluorochloroethylene microporous film structure. The catalyst powder is in a grade of nanometer or micron and is selected from one or more of vanadium pentoxide, vanadium trioxide, tungsten trioxide, titanium dioxide and manganese dioxide. By utilizing the preparation method to prepare the filter material, the process is simple and easy to implement, and processing costs of preparation of catalyticfibers, film covering and the like are reduced. In addition, compared with a polytetrafluoroethylene microporous film, running resistance is low, and difficulties in follow-up sewing, transportation,installation and the like of the filter material are reduced simultaneously.

The invention relates to a solar cell back panel film and a preparation method thereof. The solar cell back panel film is characterized in that the two sides of a polyester base layer are composited with wear-resistant layers by coating adhesive bonding layers; the wear-resistant layers are fluorine-containing films prepared by mixing fluorine plastic with polymer fillers, inorganic fillers and functional auxiliaries, then extruding and granulating the mixture and then carrying out casting or film blowing; the fluorine plastic is an ethylene-chlorotrifluoroethylene copolymer or polyvinylidene fluoride and accounts for 50-80wt% of the wear-resistant layers; the polymer fillers are polyacrylic ester polymers and account for 10-30wt% of the wear-resistant layers; the inorganic fillers are oxides containing titanium, aluminium, tin and silicon and account for 10-20wt% of the wear-resistant layers; and the functional auxiliaries account for 0-2wt% of the wear-resistant layers. The solar cell back panel film has the following beneficial effects that good adhesiveness is ensured between the wear-resistant layers and packaging materials; and the back panel film has tight structure, less production processes and low cost.

The invention relates to an elastic polyvinylidene fluoride heat-shrinkable sleeve which is composed of the following components in parts by weight: 85-95 parts of polyvinylidene fluoride plastic, 5-15 parts of fluororubber elastomer, 1-3 parts of antioxygen, 2-5 parts of assistant crosslinker, 3-8 parts of plasticizer, 0.5-2 parts of acid accepter and 2-5 parts of color master. The polyvinylidene fluoride plastic is one or two of the following matters: 1,2-difluoroethene homopolymer and 1,2-difluoroethene- hexafluoropropylene homopolymer. The fluororubber elastomer is one, two or more than two of the following matters: vinylidene fluoride and chlorotrifluor ethylene copolymer, vinylidene fluoride and hexafluoropropylene copolymer, vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene terpolymer. According to the elastic polyvinylidene fluoride heat-shrinkable sleeve, such performances of fluoroplastic as wear resistance, mechanical damage resistance and the like are kept simultaneously, elasticity of the heat-shrinkable sleeve is improved, the elastic polyvinylidene fluoride heat-shrinkable sleeve has such specific performances of fluororubber as oil resistance simultaneously, application scope of the fluoride heat-shrinkable sleeve is broadened and risk in the process of use is reduced.

The invention discloses a low-temperature-resistant fluororubber heat-shrinkable casing, which consists of the following components in parts by weight: 100 parts of fluororubber elastomer, 20-60 parts of polyvinylidene fluoride resin, 5-10 parts of an acid-acceptor, 30-40 parts of a filling agent and 0.5-3 parts of a plasticizer, wherein the fluororubber elastomer is a blend of two or more of a vinylidene fluoride-trifluorochloroethylene copolymer, a vinylidene fluoride-hexafluoropropylene copolymer and a vinylidene fluoride-trifluorochloroethylene-hexafluoropropylene copolymer; the polyvinylidene fluoride resin is one or a mixture of a 1,2-polyvinylidene difluoride homopolymer and a 1,2-polyvinylidene difluoride-hexafluoropropylene copolymer. The low-temperature-resistant fluororubber heat-shrinkable casing is excellent in low temperature resistance, flame retardation, mechanical property, aging resistance and thermal shock performance.

The invention discloses a method for determination of the polychlorotrifluoroethylene (PCTFE) content in a polymer-bonded explosive (PBX) by near infrared spectroscopy. The method includes the steps of: preparing and collecting 260 PBX samples, taking 180 samples of them as a calibration set for establishing a calibration model, taking the remaining 80 samples as a validation set for model validation, and acquiring the near infrared spectrum data of all the samples; using a standard method to determine the PCTFE content in the samples; subjecting the spectrum data of the validation set samples in the wave bands of 6102.0cm<-1>-5697.0cm<-1> and 4680.2cm<-1>-4242.9cm<-1> to a first order derivative treatment, correlating the treated spectrum data with the PCTFE content by a partial least squares method, and establishing the calibration model by cross validation; employing the calibration model to predetermine the PCTFE content of the validation set samples, and selecting an optimal model according to a minimum root mean squared error of prediction (RMSEP) of the validation set; and acquiring the near infrared spectrum data of the samples to be determined, and making use of the optimal model to obtain the PCTFE content directly. Being suitable for determination of the PCTFE content in a PBX explosive, the method has the characteristics of convenient operation, and rapid and accurate analysis.

This invention relates to a manufacturing method for an improved high temperature macromolecule PTC thermistor composed of a core, metallic foils adhered to both sides of the core, a lead out electrode welded on the outer surface of the foil and an insulation layer covering the outside, in which, said core is pressed by a powder conduction macromolecule material mixed by a macromolecule polymer, carbon black, carbon black dispersant and other processed aids in the following weight percentage: macromolecule polymer: 35-60%, carbon black:35-55%, Teflon powder: 0.5-20% and aids: 0.1-10%, in which, said macromolecule polymer is: PVDF, soluble Teflon, ethane and TFE multi-polymers, nylon, perfluoro-ethane and propene, ethane TFCE or their multi-polymer or their mixture.

The invention relates to a waterborne FEVE (chlorotrifluoroethylene copolymer) fluorocarbon coating and a preparation method thereof. The coating is prepared from the following raw materials in percentage by mass: 0.05-0.20% of alkaline pH value regulator, 0.05-0.20% of hydroxyl cellulose, 0.10-0.50% of wetting agent, 0.20-1.00% of dispersing agent, 0.05-0.20% of defoaming agent, 1.00-30.00% of pigment, 0.00-30.00% of filler, 0.10-1.00% of nanometer anatase titanium dioxide, 1.00-3.00% of film-forming additive, 0.20-1.00% of thickening agent, 0.00-1.00% of flatting agent, 45-65% of FEVE fluorocarbon resin emulsion and the balance of water. The preparation method comprises the steps of: color paste preparation, paint mixing and the like. The production time is shortened, and air bubbles in the coating are effectively eliminated by combining the effects of machines and auxiliaries. The coating prepared by the invention is a waterborne single-component normal-temperature cured fluorocarbon coating, has excellent weather resistance, pollution resistance, acid rain resistance and mildew resistance, and has the characteristics of environment friendliness, safety, no toxicity and the like.

To aim to provide a photocatalyst coating composition having a predefined photocatalytic function, which is to be formed as a coating film after being applied to a substrate and dried. The photocatalyst coating composition can improve adhesion property and abrasion resistance of the coating film. There is also provided a photocatalyst coating composition that has a shorter drying time after applied. The present invention provides a photocatalyst coating composition that is composed of a blend including: a graft copolymer of PTFE and perfluoro acid selected from the group consisting of perfluorosulfonic acid and perfluorocarbonic acid; a photocatalyst material; and at least one fluororesin selected from the group consisting of PVDF, PVF, PTFE, ETFE, PVDF-HFP, PCTFE, trifluorochloroethylene-alkyl vinyl ether copolymer, tetrafluoroethylene-alkyl vinyl ether copolymer, and trifluorochloroethylene-alkyl vinyl ether-alkyl vinyl ester copolymer.