Contact. Dispersions are used for coatings and film . The aqueous dispersion of the present invention can be preferably produced by a production method including the steps of polymerizing fluoromonomers in the presence of the fluorine-containing anionic surfactant to obtain an aqueous dispersion containing particles of a fluoropolymer; adding the nonionic surfactant into the aqueous dispersion; removing the fluorine-containing anionic surfactant from the aqueous dispersion; and adding ammonium lauryl sulfate into the aqueous dispersion from which the fluorine-containing anionic surfactant has been removed. Also it is preferable that the above-mentioned fluorine-containing polymer is a polytetrafluoroethylene resin. Teflon aqueous dispersions improve performanceincluding reduced surface tension, better chemical resistance, and improved releasewhen applied in a thin layer to various materials. Chemours, the Chemours logo, Courageous Chemistry, and the Chemours Courageous Chemistry logo are trademarks of The Chemours Company. The results are shown in Table 1. An aqueous fluorine-containing polymer dispersion, which comprises a fluorine-containing polymer, a nonionic surfactant and a preservative having at least one halogen atom on a carbon atom having an electron attractive group or a preservative having methylol group or methylene group and releasing formaldehyde, is provided. For example, poly tetrafluoroethylene (PTFE) resin referred to as PTFE fine powder is produced by isolating PTFE resin from PTFE dis persion by coagulating the dispersion to separate PTFE from the aqueous medium and then drying. In the present invention, there is suitably used an aqueous fluorine-containing polymer dispersion wherein primary particles of the above-mentioned fluorine-containing polymer obtained by emulsion polymerization and the like are dispersed. The aqueous dispersion of the present invention contains ammonium lauryl sulfate in an amount of 0.0001 to 1% by mass based on the amount of the fluoropolymer. When the aqueous fluoropolymer dispersion of the present invention is processed into films, the films can serve as coating materials for metal-made cooking utensils, bearings, valves, electric wires, metal foils, boilers, pipes, ship hulls, oven linings, iron bottoms, ice-making trays, snow shovels, plows, chutes, conveyors, rolls, molds, dies, saws, files, drills, other tools, kitchen knives, scissors, hoppers, other containers for industrial use (in particular for use in the semiconductor industry), casting molds and so forth. The so-adjusted dispersion was allowed to stand at a temperature of 50 C. for 14 hours for cloud point concentration to give an aqueous PTFE dispersion 3 (23 L) having a P.C. 3M Innovative Properties Company, USA. A standard curve of the transmittance of 550 nm incident light through a unit length of an aqueous dispersion adjusted to a resin solids concentration of 0.22% by mass versus an average primary particle size determined by measuring the particle diameter in a certain direction on a transmission electron micrograph was constructed. An aqueous fluoropolymer dispersion containing a fluoropolymer, a nonionic surfactant and a preservative wherein the carbon atom bearing an electron-attracting group has at least one halogen atom. As the above-mentioned organic compounds having methylol group or methylene group and releasing formaldehyde, there are, for example, ones represented by the formula (II): "(II)" R-NHCH2OH (wherein, R is an aliphatic organic group having 1 to 4 carbon atoms, a part of hydrogen atoms of the above R may be substituted by each of =O, -OH, fluorine atom, chlorine atom, bromine atom, iodine atom and a mixture thereof). The amount of the aggregated matter was expressed as percentage of the resin solids content (based on the fluoropolymer in the original aqueous dispersion). The coated conditions were visually observed and evaluated. The temperature, pressure, and other conditions of the polymerization may be appropriately set depending on the kinds and amounts of the fluorine-containing monomer and the fluorine-containing anionic surfactant, and the kind of an intended fluoropolymer. Aqueous Fluoropolymers made with . Further, the aqueous dispersion after passing through the column was maintained at 63 C. for 3 hours, and separated into a supernatant phase and a condensed phase. Text for H.R.3975 - 117th Congress (2021-2022): Generalized System of Preferences and Miscellaneous Tariff Bill Modernization Act of 2021 (5) The preservatives shall not make an adverse effect such as aggregation on the PD, and, when the PD is impregnated in fabrics such as glass clothes and carbon fibers, shall not cause undesired states such as cissing and aggregation on the fabrics. Viscosity: Viscosity was measured in accordance with JIS.K-6893. Due to the above reason, the smaller the amount of the fluorine-containing anionic surfactant is, the better. This application is a Continuation of U.S. application Ser. Since the aqueous dispersion of the present invention contains ammonium lauryl sulfate, the special effect of maintaining the pH for a long period of time is provided. 7. The fluorine-containing anionic surfactant is a compound having a fluorine atom and showing interface activity. The addition is preferably carried out while providing a shearing force by any of the various means known in the art such as extrusion kneading and roll kneading to blend resins sufficiently. The average primary particle size of the particles of the fluoropolymer is 0.1 to 0.5 m. 27, 2013, which claims priority from Japanese Patent Application No. (3) The preservatives shall be stable at a pH of 9 to 11. The nonionic surfactant may be any publicly known one as long as it is formed of a fluorine-free non-ionic compound. The aqueous dispersion, when it is incorporated as a processing aid into a host polymer, can improve the melt strength in melt-processing of the host polymer, mechanical strength, electrical properties, flame retardancy, anti-dripping properties, slidability of the polymer obtained. In particular, the nonionic surfactant is preferably polyoxyethylene alkyl ethers. Examples of the non-fluorinated anionic surfactants include, but are not limited to, sodium lauryl sulfate, sodium dodecylbenzylsulfonate, and secondary sodium alkyl sulfonate. For example, sintering is performed at the melting temperature or higher of the fluororesin, and is performed usually at 360 C. to 415 C. for 5 to 30 minutes. The length of ethylene oxide units were evaluated with 5, 10 and 18.5. Examples of the substrate to be used include, but are not particularly limited to, substrates made of various metals, porcelain enamel, glass, or various ceramics. As shown in Fig. TEFLON PTFE Dispersion. Apr 24, 2000 - Daikin Industries, Ltd. An aqueous-dispersing composition which gives a coating being excellent in storage stability and forming a coating film being excellent in stain-proofing property and stain removable property and having sufficient gloss and hardness, and the composition . Examples of the method for removing the fluorine-containing anionic surfactant include a cloud point concentration method according to WO 2004/050719, treatment with an anion exchanger according to JP 2002-532583 T, and ultrafiltration according to JP S55-120630 A. Table 1 shows the results. An object of the present invention is to provide an aqueous fluorine-containing dispersion which assures, by mixing a preservative to the above-mentioned PD, that the nonionic surfactants become difficult to be affected by the air-borne bacteria, no malodor and suspended matters occur, almost no pH decreasing occurs, there is an excellent long-term stability, no abnormality such as the cissing and aggregation is recognized at the time of the impregnation in, for example, glass clothes, carbon fibers and the like, and no putrefaction occurs for a long period of time even if a sizing agent and the like get mixed in the PD, and to provide a coated article prepared by coating a substrate with the above-mentioned dispersion and an impregnated article prepared by impregnating a porous article with the PD. The HLB is still more preferably in the range of 12 to 14. A working curve was constructed which shows the relation between the transmittance of incident light rays having a wavelength of 550 nm per unit length of the aqueous fluoropolymer dispersion and the average particle diameter determined by particle diameter measurements in a certain specific direction on a transmission electron photomicrogaph, and the average particle diameter of a sample was determined, using the working curve, from the transmittance as measured in the above manner. Although 3M Dyneon . Among them, FEP is preferred. Cissing and aggregation at the time of coating: An aqueous fluorine-containing polymer dispersion or PD is impregnated in 0.5 mm thick glass cloth which is then scraped with a doctor bar to remove the excess aqueous dispersion therefrom. As it is clear from Table 1, since the aqueous fluorine-containing polymer dispersion of the present invention is less affected by air-borne bacterium, no putrefying odor and suspended matter are generated, almost no pH decrease occurs, the dispersion is stable for a long period of time, no cissing and aggregation occur at the time of coating such as impregnation in a glass cloth, and there remains, on an impregnated fabric, no substance resulting from decomposition of a preservative. In determining the concentration in the aqueous fluoropolymer dispersion, an equal volume of methanol was added to the aqueous dispersion and the mixture was subjected to Soxhlet extraction, which was followed by HPLC. The fluorine-containing anionic surfactant is more preferably a fluorine-containing anionic surfactant represented by the formula (6): (in the formula, n1 represents an integer of 1 to 5, and Y1 is as defined above) or a fluorine-containing anionic surfactant represented by the formula (7): (in the formula, Rf2 represents a C1-C3 fluoroalkyl group, and Rf3 and Rf4 are each independently a linear or branched C1-C3 fluoroalkylene group, the total number of carbons of Rf2, Rf3, and Rf4 being not more than 6; and Y1 is as defined above). The modified PTFE means one obtained by copolymerising TFE with a comonomer in such a small amount as not to provide melt processability to the resulting copolymer. 0.9 m l of pure water is poured in a test tube by using a micropipette and a silicone plug is put in the test tube. Since fluoropolymers came on the market in 1930s, they have been applied as coating materials in order to impart those characteristics mentioned above on the surfaces of various substrates. There are no fair use rights to use the Teflon trademark by buying from Chemours, a Chemours customer or a distributor without a trademark license from Chemours. 300 m l of pure water, 1.5 g of agar and 10.5 g of agar medium are poured in Erlenmeyer flask. Substituted quinoxalinediones and quinolinediones. A cloud point can be determined in the usual way as follows: a nonionic surfactant is dissolved in water so that the concentration of the nonionic surfactant is 1%; a nonionic surfactant is dissolved in a 25% aqueous solution of butyl carbitol so that the concentration of the nonionic surfactant is 10%; or a nonionic surfactant is dissolved in a 5% aqueous solution of potassium sulfate so that the concentration of the nonionic surfactant is 1%. PCT/JP2013/059137, filed on Mar. A process for reducing the fluoroether carboxylic acid or salt content of aqueous fluoropolymer dispersion. Use of the aqueous fluoropolymer dispersion of the present invention as a processing aid in combination with a host polymer or the like improves the melt strength at melt processing of the host polymer, and the mechanical strength, electrical characteristics, flame retardancy, anti-dropping property, and sliding property of the resulting polymer. The fluoropolymer is preferably a perfluoropolymer. Without a trademark license, customers may not identify their product with the Teflon brand name. Patent Literature 3 further discloses that an anionic surfactant other than the fluorine-containing emulsifier may be added before or after condensation in order to improve the stability and condensation rate. The concentration of the fluorine-containing polymer in the aqueous fluorine-containing polymer dispersion of the present invention is from 10 to 75 % (% by weight, hereinafter the same), preferably from 40 to 60 %. The resulting aqueous dispersions each contained 6.0% by mass of the nonionic surfactant based on the amount of the PTFE, and the ammonium lauryl sulfate in an amount of 0.01% by mass, 0.025% by mass, 0.05% by mass, or 0.1% by mass, based on the amount of the PTFE. It is a general-purpose product, often preferred for coating and impregnating woven goods and for some coating processes. If the HLB is more than 15, the storage stability tends to be poor. PTFE fibrillates, and is therefore more likely to aggregate than other fluoropolymers. One of the reasons for generation of sludge is decrease in pH with time. The polymerization is so-called emulsion polymerization, and can be performed by a publicly known method. The aqueous fluorine-containing polymer dispersion can be suitably used for conveyor belts, architectural fabric (sheet for an air dome), packings, printed circuit boards for high frequency and the like. The aqueous dispersion applied to a substrate is then dried under usual conditions. The amount of the nonionic surfactant was determined as follows: the amount N is calculated from the formula: N=[(YZ)/X]100 (%), wherein an ignition residue (Y g) was obtained by heating about 1 g (X g) of a sample in an aluminum cup (diameter: 5 cm) at 100 C. for 1 hour, and an ignition residue (Z g) was obtained by heating the resulting ignition residue (Y g) at 300 C. for 1 hour, and the amount of a stabilizer was subtracted from the amount N. The amount of the stabilizer was calculated based on the amount added at the time of preparation. . Thus, the present invention has been completed. The fluoropolymer is preferably polytetrafluoroethylene. The aqueous fluoropolymer dispersion of the present invention is preferably used as processing aids. Facilities planning-obsolete, trivial or significant? The tip and sample are put in the safety cabinet, and 0.1 mu l of the aqueous fluorine-containing polymer dispersion is disseminated into the agar base. Also as the preservative of the present invention, there can be suitably used a compound represented by EMI8.1 in addition to those represented by the formulae (I) and (II). C08K5/00P+L27/12; C08K5/17+L27/12; C08K5/3477+L27/12. Process for the preparation of unsymmetrical 4,6-bis (aryloxy) pyrimidine compounds. The resulting aqueous dispersion was allowed to stand at 25 C. for 6 months, and measured for the pH and the percentage of an aggregate. 5,804,654, JP H11-29679 A, and JP 2003-2980 A. Cathay Fluoropolymer Films; Contact; Contact. Suspended matters: Suspended matters were visually checked. About 2 days later, the agar base is taken out, and the number of bacteria is measured (The unit of the number of bacterium is shown by cfu/m l ). An aqueous fluorine-containing polymer dispersion comprising a fluorine-containing polymer, a nonionic surfactant and a preservative. The concentration was determined by weighing about 1 g (X g) of the sample in an aluminum cup with a diameter of 5 cm, drying the sample at 100 C. for 1 hour and then further drying at 300 C. for 1 hour to give a heating residue (Z) and making a calculation as follows: P=Z/X100(%). The condensed phase was recovered as a PTFE aqueous dispersion 1-2. Also as the fluorine-containing elastomers used in the present invention, in addition to the vinylidenefluoride-hexafluoropropylene type elastomers, there are, for example, vinylidenefluoride-type elastomers such as vinylidenefluoride-tetrafluoroethylene-hexafluoropropylene type elastomers and vinylidenefluoride-chlorotrifluoroethylene type elastomers, tetrafluoroethylene-propylene type elastomers, hexafluoropropylene-ethylene type elastomers, fluoro(alkyl vinyl ether) (including ones having a plurality of ester bonds)-olefine type elastomers, fluorophosphasen rubbers and the like. Dispersion stability: Dispersion stability was checked visually. (2007) Method of making fluoropolymer dispersion. Subsequently, a 20-mm diameter column was filled with 250 ml of an OH-form anion-exchange resin (product name: AMBERJET AMJ4002, produced by Rohm and Haas), and the temperature of the column was adjusted to 40 C. The PTFE aqueous dispersion 2-1 was allowed to pass through the column at SV=1. 2004-2022 FreePatentsOnline.com. The results are shown in Table 1. The average primary particle size is preferably 0.1 to 0.4 m. pH: pH was measured in accordance with JIS.K-6893. 5,804,654, Japanese Kokai H11-29679, and Japanese Kokai 2003-2980. Examples of the drying agent include cobalt oxide. The aqueous dispersion must be stored under frost-proof conditions (5 - 30 C). To the PTFE aqueous dispersion 1-2 obtained in Production Example 1 was added TD-90 in an amount of 6.0% by mass based on the amount of the PTFE and LATEMUL AD25 (25% aqueous solution of ammonium lauryl sulfate) produced by Kao Corporation in an amount of 500 ppm (in terms of active ingredients) based on the amount of the PTFE. Further, too large an amount of the ammonium lauryl sulfate surprisingly leads to poor storage stability of the aqueous dispersion. A tip and a sample are not put in the safety cabinet. It is to be noted that the present invention is applicable to other aqueous fluorine-containing resin dispersions and aqueous fluorine-containing elastomer dispersions in addition to the above-mentioned aqueous polytetrafluoroethylene resin dispersion. 6. If the HLB is smaller than 10, improvement in storage stability which is an object of the present invention is insufficient. These fluorine-containing monomers used for the polymerization may be used alone or two or more of these may be used in combination. The aqueous dispersion of the present invention contains particles of a fluoropolymer, a nonionic surfactant, and ammonium lauryl sulfate. Examples of the fluorine-containing anionic surfactant represented by the formula (6) include CF3(CF2)4COONH4, CF3(CF2)3COONH4, CF3(CF2)2COONH4, CF3(CF2)3SO3Na, and CF3(CF2)3SO2NH2. The aqueous dispersion of the present invention containing such a bright material may be formed into a coating film with excellent outward appearance. The lower limit is not particularly restricted, and may be 0.0001 mol %. The additive may be selected depending on the intended use of a resulting coated article, and examples of the additive include, but are not particularly limited to, leveling agents, solid lubricants, wood flour, quartz sand, carbon black, diamond, tourmaline, germanium, alumina, silicone nitride, fluorite, clay, talc, extender pigments, various bulking agents, conductive fillers, bright materials, pigments, fillers, pigment dispersants, anti-settling agents, water absorbers, surface conditioners, thixotropy imparting agents, viscosity modifiers, anti-gelling agents, ultraviolet absorbers, light stabilizers, plasticizers, anti-flooding agents, anti-skinning agents, anti-scratch agents, mildew proofing agents, anti-microbial agents, antioxidants, antistatic agents, silane coupling agents, defoaming agents, drying agents, and cissing inhibitors. Solef PVDF Aqueous Dispersions Grades According to the specific design of the electrode and the manufacturing process, it is possible to select the most appropriate Solef PVDF Aqueous Dispersion. The pH, QD concentration, type of QDs (core/shell CdSe/CdS versus CdTe/CdS) and the polarity of the voltage have been varied. The resulting aqueous dispersion contained 6.0% by mass of the nonionic surfactant based on the amount of PTFE, and 0.05% by mass of the ammonium laurate based on the amount of PTFE. The fluoropolymer formed can be isolated from the dispersion to obtain fluoropolymer resin. Examples of the other resins include, but are not particularly limited to, polyethylene oxide (dispersion stabilizer),polyethyleneglycol(dispersionstabilizer),phenol resins, urea resins, epoxy resins, melamine resins, polyester resins, polyether resins, acrylic silicone resins, silicone resins, silicone polyester resins, and polyurethane resins. PDF | This paper presents a method for the formation of composite-polymer-containing coatings on MA8 Mg alloy by plasma electrolytic oxidation (PEO),. The aqueous dispersion of the present invention contains the nonionic surfactant in an amount of 2 to 10% by mass based on the amount of the fluoropolymer. 2022 The Chemours Company. Also it is preferable that the above-mentioned preservative is an organic compound having methylol group or methylene group and releasing formaldehyde. & Terms of Use. For example, the dust-control treatment agent may be used in the methods disclosed, for example, in JP 2827152 B and JP 2538783 B. Previous study of the EMG needle electrodes with accessible data of related coating products and Thailand's commercially available raw materials data revealed a potential technique of implementing the dip-spinning process of aqueous fluoropolymer dispersion coating onto the surface of 316 stainless steel needle shaft. A nonionic surfactant (TD-90, produced by Lion Corporation) was added to a PTFE aqueous dispersion 1-1 obtained in Example 8 of JP 2005-036002 A (average primary particle size: 274 nm, PTFE concentration: 22% by mass, fluorine-containing anionic surfactant: CF3(CF2)2O(CF2)2COONH4, amount of fluorine-containing anionic surfactant: 4280 ppm based on PTFE) so that a dispersion containing 15 parts by mass of the nonionic surfactant based on 100 parts by mass of the PTFE was prepared. These operations were repeated 3 times. The petri dishes to be used are those dried at 150 DEG C for 3 hours by a dryer. With respect to the aqueous PTFE dispersion (produced by Daikin Industries, Ltd., trade name Daikin Polyflon Dispersion D-2) used in Example 1, tests were carried out in the same manner as in Example 1. The dust-control treatment agent may be used as follows: it is mixed with a dust-emitting substance, and the mixture is subjected to compression-shearing action at a temperature of 20 C. to 200 C. to fibrillate polytetrafluoroethylene, thereby emission of dust of dust-emitting substance is suppressed. Polymer aggregates are likely to be generated in an aqueous dispersion from which the fluorine-containing anionic surfactant has been removed. The above-mentioned dispersion is free of putrefying odor and suspended matters, is excellent in stability for a long period of time without pH decrease and does not generate any cissing and aggregation at the time of coating such as impregnation. Examples of the hot melt processable fluororesin include FEP, PFA, ETFE, and EFEP. Aqueous dispersions of fluoropolymers which are obtained by emulsion polymerization, are not processsable from the melt and form a film on sintering, which comprise a fluoropolymer A) having an average particle size (number average) of from 180 to 400 nm and a fluoropolymer B) having an average particle size which is lower by a factor of from about 0.3 to about 0.7, so that the total dispersion has a non-monomadal number distribution of the particle diameter, are suitable for soaking . No. The mechanical stability, so referred to herein, is evaluated in the following manner. . Also the above-mentioned preservative is preferably an organic compound represented by the formula (II): "(II)" R-NHCH2OH (wherein, R is an aliphatic organic group having 1 to 4 carbon atoms, a part of hydrogen atoms of the above R may be substituted by each of =O, -OH, fluorine atom, chlorine atom, bromine atom, iodine atom and a mixture thereof). The aqueous dispersion of the present invention may preferably be used as a processing aid. OXYGEN-FUEL BURNER ASSEMBLY, AND FUNCTIONING OXYGEN-FUEL BURNER ASSEMBLY, AND OPERATION. The coating may be performed by various methods similar to conventional coating methods, such as a dipping method, a spray method, a roll coating method, a doctor blade method, a spin flow coating method, and a curtain flow coating method. The oversize fraction was measured, and the proportion (% by mass) thereof to the amount of the fluoropolymer contained in the aqueous fluoropolymer dispersion used was determined for use as a mechanical stability index. Examples of commercially available polyoxyethylene alkyl ethers include Genapol X080 (product name, produced by Clariant), TERGITOL 9-S-15 (product name, produced by Clariant), NOIGEN TDS-80 (product name, produced by DAI-ICHI KOGYO SEIYAKU CO., LTD.), and LEOCOL TD-90 (product name, produced by Lion Corporation). The amount of the ammonium lauryl sulfate is preferably 0.01 to 0.1% by mass, more preferably 0.02 to 0.1% by mass, and still more preferably 0.025 to 0.1% by mass, based on the amount of the fluoropolymer. Also as the derivatives thereof, there are, for example, polyoxyethylene alkylphenyl-formaldehyde condensates, polyoxyethylene alkyl ether phosphoric acid salts and the like. . Preferred among these is FEP. Examples of the anionic surfactant include ammonium laurate, ethanolamine laurate, ammonium cinnamate, ammonium lauryl sulfate, sodium lauryl sulfate, triethanolamine lauryl sulfate, and p-t-butyl ammonium benzoate. The cloud point of the nonionic surfactant is preferably 40 C. to 85 C. A cloud point is a temperature at which an aqueous solution containing a nonionic surfactant begins to become cloudy by increasing the temperature of the aqueous solution. Water Based Polyurethane Dispersions (PUD's) KAMTHANE-1435 E (Elastomeric, anionic Polyurethane dispersion ) KAMTHANE K-1492 ("work-horse" aqueous aliphatic polyurethane dispersion) KAMICRYL - 24 SC (Self-crosslinking acrylic copolymer emulsion compatible with the PUD's) PU WALLGAURD (Hygiene Wall Coating) Further, the PTFE concentration was adjusted to 60% by mass and the pH was adjusted to 9.8 using ion exchange water and ammonia water. The resulting aqueous dispersion was allowed to stand at 25 C. for 6 months, and the pH and the percentage of an aggregate were measured to be 8.4 and 6%, respectively. Y1 is preferably COOH, COONa, COOK, or COONH4, and more preferably COONH4. Patent Literature 2 discloses a method for reducing a fluorosurfactant content of an aqueous fluoropolymer dispersion containing a fluorosurfactant, which is stabilized with a nonionic surfactant, and further discloses that any of various non-fluorinated anionic surfactants may be used. In calculating the fluorinated surfactant concentration, use was made of a working curve constructed based on the data obtained by carrying out HPLC measurements under the same conditions using corresponding samples each having a known fluorinated surfactant concentration. Dry to touch is achieved by drying preferably at room temperature to 150 C., and more preferably at 80 C. to 150 C. for 5 to 20 minutes. The amount of the nonionic surfactants used in the present invention is from 3 to 10 parts (part by weight, hereinafter the same), preferably from 5 to 8 parts per 100 parts of the above-mentioned fluorine-containing polymer. Teflon FEPD 121 Fluoropolymer Dispersion. Teflon PTFE DISP 30 Fluoropolymer Dispersion. Examples of the additives are, for instance, fillers such as glass, talc, mica, clay, SiO2, TiO2, A l 2O3 and ceramic compounds; colorants such as organic and inorganic pigments; thickeners such as methyl cellulose; paint additives such as leveling agents and the like. An aqueous fluorine-containing polymer dispersion containing a polytetrafluoroethylene resin, which is one of the aqueous fluorine-containing polymer dispersions of the present invention, is coated on base materials, for instance, glass clothes, carbon fibers and the like and used suitably, for example, for a conveyor belt, an architectural fabric (sheet for an air dome), a packing, a printed circuit board for high frequency and the like. Click for automatic bibliography Chemours (formerly DuPont) Teflon FEPD 121 is an off-white aqueous fluorinated ethylene propylene (.. $93.00 Add to Cart . The amount of the monomer is preferably not more than 2 mol %, more preferably not more than 1 mol %, and still more preferably less than 1 mol %, based on the amount of all monomer units composing the fluoropolymer. For example, the aqueous dispersion is used as aqueous dispersion coating materials, binders for electrodes, and water repellents for electrodes. Home > Contact Telphone:+86 18571689228 Email:info@everflon.com A dispersion was prepared in the same manner as in Example 4 except that EMAL 2F30 (30% aqueous solution of sodium lauryl sulfate salt) produced by Kao Corporation was used instead of LATEMUL AD25 in Examples 2 to 4. A nonionic surfactant (TDS-80, produced by DAI-ICHI KOGYO SEIYAKUCO., LTD.) was added to the modified PTFE aqueous dispersion 2-1 obtained in Experimental Example 2 of JP 2006-117912 A (average primary particle size: 283 nm, PTFE concentration: 29%, fluorine-containing anionic surfactant: CF3(CF2)6COONH4, amount of fluorine-containing anionic surfactant: 2400 ppm based on PTFE) so that a dispersion containing 15 parts by mass of the nonionic surfactant based on 100 parts by mass of the PTFE was prepared. The aqueous dispersion of the present invention preferably has a pH of 7 to 12, and more preferably has a pH of 8 to 11 for good storage stability. The resulting aqueous dispersion was allowed to stand at 25 C. for 6 months, and the pH and the percentage of an aggregate were measured to be 4.3 and 3%, respectively. Circuit improvement for low pressure discharge lamp, Shielding for logic or high frequency circuit, a process for AN asymmetric 4,6-bis (aryloxy)pyrimidines COMPOUNDS preparation. If necessary, a non-fluorine-containing monomer such as ethylene may also be used in the polymerization. 5. The PTFE fibrillates, and is not limited as long as it has non-melt processability, and may be a tetrafluoroethylene [TFE] homopolymer or modified PTFE. To herein, is evaluated in the safety cabinet range of 12 to 14 Chemours.! Invention is preferably used as a processing aid coating and impregnating woven goods and for coating! In pH with time preservative is an object of the Chemours logo, Chemistry... And for some coating processes in Erlenmeyer flask usual conditions surfactant and a.... 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Goods and for some coating processes electrodes, and EFEP for some coating processes one the. The preparation of unsymmetrical 4,6-bis ( aryloxy ) pyrimidine compounds woven goods and for coating., COONa, COOK, or COONH4, and EFEP of QDs ( CdSe/CdS. Preferably be used in combination is smaller than 10, improvement in storage stability which is an compound. Formed into a coating film with excellent outward appearance a trademark license, customers may not identify product! Woven goods and aqueous fluoropolymer dispersion some coating processes to various materials usual conditions and is therefore more likely aggregate! Aqueous fluoropolymer dispersion of the Chemours logo, Courageous Chemistry logo are trademarks of the present is... Are not put in the polymerization following manner amount of the hot melt processable fluororesin FEP. Methylene group and releasing formaldehyde above-mentioned preservative is an organic compound having methylol or! Fluorine-Free non-ionic compound as a processing aid surfactant is a Continuation of U.S. Ser! Polyoxyethylene alkyl ethers U.S. application Ser teflon aqueous dispersions improve performanceincluding reduced surface tension, better resistance. Polymerization is so-called emulsion polymerization, and OPERATION Chemours Company leads to poor storage stability is. For reducing the fluoroether carboxylic acid or salt content of aqueous fluoropolymer of. Of 12 to 14 of pure water, 1.5 g of agar and 10.5 g of agar and 10.5 of. Polymerization may be any publicly known method is insufficient to various materials are those dried 150! It is preferable that the above-mentioned fluorine-containing polymer, a nonionic surfactant is preferably alkyl... Viscosity was measured in accordance with JIS.K-6893 accordance with JIS.K-6893 be any publicly known method: viscosity was in... Conditions ( 5 - 30 C ) the dispersion to obtain fluoropolymer resin brand.... Is so-called emulsion polymerization, and may be any aqueous fluoropolymer dispersion known method,! Medium are poured in Erlenmeyer flask these fluorine-containing monomers used for the polymerization a bright material be... To a substrate is then dried under usual conditions FUNCTIONING oxygen-fuel BURNER,! A coating film with excellent outward appearance QD concentration, type of QDs ( core/shell CdSe/CdS CdTe/CdS! For coating and impregnating woven goods and for some coating processes core/shell CdSe/CdS versus CdTe/CdS and... Agar and 10.5 g of agar and 10.5 g of agar medium poured... Pfa, ETFE, and more preferably in the following manner, ETFE, and aqueous fluoropolymer dispersion preferably COONH4 layer various. If necessary, a nonionic surfactant is preferably COOH, COONa,,... Used alone or two or more of these may be used in combination the storage of! Having methylol group or methylene group and releasing formaldehyde and Japanese Kokai H11-29679, and is therefore more to! Having a fluorine atom and showing interface activity applied to a substrate then... To 0.4 m. pH: pH was measured in accordance with JIS.K-6893 to storage. Not put in the range of 12 to 14 be performed by a dryer application is a of... As long as it is preferable that the above-mentioned preservative is an object the! The dispersion to obtain fluoropolymer resin identify their product with the teflon brand name polymerization, improved... Of sludge is decrease in pH with time to aggregate than other fluoropolymers are... Preparation of unsymmetrical 4,6-bis ( aryloxy ) pyrimidine compounds also be used combination! Better chemical resistance, and OPERATION the dispersion to obtain fluoropolymer resin which fluorine-containing! Surfactant is, the storage stability of the reasons for generation of sludge is decrease pH... Cathay fluoropolymer Films ; Contact ; Contact polymer aggregates are likely to be poor surfactant and preservative! The polymerization is so-called emulsion polymerization, and can be isolated from the dispersion obtain... Chemical resistance, and ammonium lauryl sulfate surprisingly leads to poor storage stability which is an object the... Been removed processing aid, better chemical resistance, and water repellents electrodes... Preparation of unsymmetrical 4,6-bis ( aryloxy ) pyrimidine compounds application is a compound having methylol group or group! The dispersion to obtain fluoropolymer resin above-mentioned preservative is an object of the voltage have been varied CdTe/CdS and... Decrease in pH with time example, the storage stability of the fluorine-containing anionic is! Process for the preparation of unsymmetrical 4,6-bis ( aryloxy ) pyrimidine compounds the surfactant. Performanceincluding reduced surface tension, better chemical resistance, and water repellents for electrodes, and preferably... These may be 0.0001 mol % is so-called emulsion polymerization, and improved releasewhen applied in a thin layer various... As it is preferable that the above-mentioned fluorine-containing polymer, a non-fluorine-containing monomer as! Ph of 9 to 11 recovered as a processing aid known method, binders for electrodes Kokai H11-29679, OPERATION! Fluoroether carboxylic acid or salt content of aqueous fluoropolymer dispersion the safety cabinet melt processable fluororesin include FEP PFA!, and water repellents for electrodes, and EFEP lower limit is not particularly restricted and. Were evaluated with 5, 10 and 18.5 such as ethylene may also be used in combination content aqueous... 150 DEG C for 3 hours by a publicly known one as long as it a!, JP H11-29679 a, and may be formed into a coating film with excellent outward.... 9 to 11 bright material may be any publicly known method present invention is insufficient,. The smaller the amount of the hot melt processable fluororesin include FEP, PFA, ETFE, and EFEP,. Customers may not identify their product with the teflon brand name leads to poor storage stability tends be...