摘要:
PROBLEM TO BE SOLVED: To provide an assembly or an MEA device in which not only coolant fluid having a lower purity than required in a conventional technology can be used, but also coolant fluid formed from a mixture of water and a high-boiling-point solvent can be used, and an adhesion of a sub-gasket with an MEA lasts long. SOLUTION: The assembly or the MEA device is composed of a membrane and two electric catalyst layers on both sides of the membrane. Each area of the two electric catalyst layers is smaller than that of the membrane. On each of both sides of an ionomer membrane, at least one sub-gasket is arranged in a non-catalyst area of the MEA and an edge of the ionomer membrane is sealed between the sub-gaskets. COPYRIGHT: (C)2007,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a catalyst coated membrane, in which the dimension variation in a hydration/dewater cycle is reduced, the adhesion of an ionomer-membrane with an electrode catalyst layer is improved, the adhesion between catalyst coated membrane layers after an immersion cycle does not vary, and the stability of the improved catalyst coated membrane in an electrochemical battery is held. SOLUTION: The catalyst coated membrane is a membrane having a first electrode catalyst layer containing a catalyst in one plane in two surfaces, and a second electrode catalyst layer containing a catalyst in the other plane. The electrode catalyst layer and the membrane contain (per)fluorinated ionomer. The dimension of the catalyst coated membrane varies not larger than 15% in the perpendicular direction of the xy plane thereof after the catalyst coated membrane is immersed in a desalted water at 100°C for 30 minutes then dried in vacuum at 105°C for 1 hour. The dimension does not vary after immersing in water at 80°C for 8 hours and followed by 60 cycles of immersion in water at 25°C for 16 hours. COPYRIGHT: (C)2006,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a method for producing peroxide of a perfluoropolyether producing commercial perfluoropolyether product without using a CFC-12 solvent. SOLUTION: The invention relates to the method for producing peroxide of perfluoropolyether comprising photooxidation of TFE in the presence of a UV-light and in presence of a mixture of solvent formed from HFC-227 and a solvent selected from HFC-125 and HFC-218 at -80 to -40°C, obtaining the peroxide with ≥1.2 of peroxide content represented by the formula: A-CF 2 O(CF 2 CF 2 O) m (CF 2 O) n -(CF 2 CF 2 OO) m1 (CF 2 OO) n1 CF 2 -B, [in the formula A and B are each the same or different -Cl, -F, -F 2 CCl, -COF, -OCOF, -CF 3 and m, m1, n and n+1 are each an integer satisfying 0.9
摘要:
PROBLEM TO BE SOLVED: To provide a perfluoroelastomer composition which has improved heat resistance at high temperatures even up to 350°C, preferably up to 340°C. SOLUTION: The crosslinking system for perfluoroelastomers hardenable by a peroxidizing process comprises a bis-olefin expressed by general formula (1) [wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each the same or different H, or a 1-5C alkyl group; Z is a 1-18C straight- or branched-chain alkylene or cycloalkylene group or a (per)fluoropolyoxyalkylene group, each of which may contain optionally an oxygen atom] as a crosslinking agent the amount of which is 0.6-1.8 wt.% in the whole polymer, and such a peroxide for use in the peroxide hardening as is capable of producing a radical by heating and as is in an amount of 0.2-1.3% by weight relative to the polymer. COPYRIGHT: (C)2006,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a fluoropolymer dispersion liquid that does not practically contain a fluorinated anionic surfactant, can be produced continuously or discontinuously with a high industrial productivity, and can be filtered within a very short time through an 80 μm net and subsequently through a 10 μm net, preferably does not leave behind any coagulated matter on the 10 μm net. SOLUTION: The method for producing a fluoropolymer dispersion liquid that does not practically contain a fluorinated anionic surfactant comprises the following processes: (a) a 1.5-25 wt% nonionic surfactant against a weight of a fluoropolymer contained in a fluoropolymer dispersion liquid is added to the dispersion liquid, (b) to the dispersion liquid is added a water soluble salt that does not give any precipitate in the dispersion liquid in a operating condition, (c) the dispersion liquid is contacted with a basic anionic ion-exchange resin and then (d) the dispersion liquid is separated from the basic anionic ion-exchange resin, wherein the dispersion liquid is to be filtered before the process (d) through a 180 μm net and successively through a 10 μm net. COPYRIGHT: (C)2005,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide perfluoropolyethers with improved absorbance at wavelength less than 250 nm. SOLUTION: The perfluoropolyethers are produced by the following processes: (a) photooxidation of TFE (tetrafluoroethylene) in the presence of fluorine diluted with an inert gas in a solvent shown by a formula C y F (2y+2-x) H x (II) (wherein y represents an integer of 2-4 and x represents 0 or an integer of 1) or a TFE oxidation using fluorine or a hypofluorite of formula R f OF (III) (wherein R f represents a 1-3C perfluoroalkyl group) as a radical initiator in an inert solvent at -40°C to -100°C under 0-12 bar pressure to synthesize a perfluoropolyether peroxide; (b) heat treatment of the reaction product obtained in the process (a) at 150-250°C in the presence of a hypofluorite of formula (III) and an optional fluorine and (c) treatment of the reaction product obtained in the process (b) with atomic fluorine or a fluorine treatment at -50°C to 120°C under UV irradiation. COPYRIGHT: (C)2005,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a foamable composition based on E/CTFE and PTFE which does not use a foaming agent, which has at least 10% porosity, and which can give a uniform electric coating having a high electric insulation and a good uniform foamed coating. SOLUTION: The composition comprises: (A) 50-99.9% by weight of at least one copolymer (1) of ethylene (E) and chlorotrifluoroethylene (CTFE) (containing 53-70% by moles of CTFE and 0.1-10% by moles of a third monomer ad libitum, and having a crystallinity in the range of 5-45%); and (B) 0.1-50% by weight of a nucleating agent, under fine powder, having an average particle size of lower than 50 μm, preferably lower than 20 μm and a melting temperature of ≥300°C. COPYRIGHT: (C)2005,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a compound which can give a paper base material an excellent oil repellency which satisfies the most severe resistance tests such as Lalston crease test, and the resistance against a mixture of oleic acid and a fatty acid with a smaller amount of use than that of compounds conventionally used by both size press and wet end treatment. SOLUTION: A carboxylic acid consisiting of a perfluoropolyether chain is represented by formula (I): T 1 -CFW 1 -O-R f -CFW 2 -T 2 , wherein T 1 and T 2 are the same as or different from each other and are -CH 2 -B-Y-(COOH) n , -CH(CF 3 )-Y(COOH) n , -F, -CF 3 , -C 2 F 5 , or -(C 2 F 4 )Cl (wherein B is -O- or -S-; Y is a 1-20C alkylene chain; and n is an integer of 1-4) and at least one of the two terminal groups, T 1 and T 2 , is -CH 2 -B-Y-(COOH) n , or -CH(CF 3 )-Y(COOH) n . W 1 and W 2 are the same as or different from each other and are -F or -CF 3 . R f consists of one or more repeating units, is a (per)fluoropolyoxyalkylene chain statistically distributed along a chain and has a number-average molecular weight in the range of 500-10,000. COPYRIGHT: (C)2005,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a thermally processable CTFE(chlorotrifluoroethylene) polymer having a combination of the following characteristics: good mechanical properties even after heat aging at a temperature higher than -100°C, in particular high elongation at break; good electric insulation property, in particular low tanδ value; and a capability of giving a structurally stable product up to a temperature of -160°C. SOLUTION: The composition comprises 90-99.5 mol% chlorotrifluoroethylene and 0.5-10 mol% ethylene in total, wherein the polymer composition has a second melting temperature (T mII ) higher than 185°C, preferably higher than 200°C, and optionally the thermally processable polymer composition is composed of an ethylene/chlorotrifluoroethylene copolymer including 0.5-20 mol% ethylene in combination with a chlorotrifluoroethylene homopolymer. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译:要解决的问题:提供具有以下特性的组合的可热加工的CTFE(三氟氯乙烯)聚合物:即使在高于-100℃的温度下,特别是高断裂伸长率的热老化之后,也具有良好的机械性能; 良好的电绝缘性能,特别是低tanδ值; 以及在-160℃的温度下得到结构稳定的产品的能力。 解决方案:组合物包含90-99.5mol%三氟氯乙烯和0.5-10mol%乙烯,其中聚合物组合物具有高于185℃的第二熔融温度(T SB> mII SB>), 优选高于200℃,并且任选地,可热加工的聚合物组合物由包含0.5-20mol%乙烯与氯三氟乙烯均聚物组合的乙烯/三氟氯乙烯共聚物组成。 版权所有(C)2005,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To obtain hydrofluoroethers by a method which is free from inconvenience and limitation of conventional techniques. SOLUTION: The hydrofluoroethers are expressed by formula (II): T-CFX'-O-R f -CFX-T' [T is CH 3 ; X and X' are identical to or different from each other, and each F or CF 3 ; T' is F, Cl, H, a 1-3C perfluoroalkyl, CH 3 , CH 2 OH, COCl, CHO or CO 2 H; and R f is a perfluoroalkylene or a perfluoropolyoxyalkylene]. The method for producing the hydrofluoroethers comprises reducing a compound corresponding to the product and having at least one -COCl end group by hydrogen gas in the presence of a platinum catalyst supported with a metal fluoride. COPYRIGHT: (C)2004,JPO