Abstract: To provide a method for producing a perfluoro compound having hydroxyl groups, whereby agglomeration of a reduction reaction intermediate tends not to occur during a reduction reaction, and a perfluoro compound having —C(?O)OH can be used as a starting material. Reducing (A-C(?O)=Q=)nRfn in the presence of a metal hydride and an inorganic salt of lithium in an alcohol solvent to obtain (B—CH(OH)-Q-)n-m(A-C(?O)-Q-)mRfn, wherein A is a hydroxyl group, a C1-5 alkoxy group, a hydrogen atom, a C1-5 alkyl group or the like, Q is a perfluoroalkylene group or the like, n is an integer of at least 1, m is an integer at least 0 and less than n, Rfn is an n valent perfluoro saturated hydrocarbon group or the like, and B is a group depending on A wherein when A is a hydroxyl group, a C1-5 alkoxy group or the like, B is a hydrogen atom, and when A is a hydrogen atom, a C1-5 alkyl group or the like, B is the same group as A.

Abstract: Obtaining a crosslinked rubber with high flexibility at low temperature includes crosslinking a fluororubber composition. The fluororubber composition includes a fluororubber and a compound of formula (X—)x(Z—)zY. In the formula, X is U—(CF2)aO(CF2CF2O)b—; Z is RFO(CF2CF2O)c—; Y is a (x+z) valent perfluoro saturated hydrocarbon group, optionally interrupted by an etheric oxygen atom; x is an integer of at least 3; z is an integer of at least 0; U is a monovalent group with an unsaturated hydrocarbon, a bromine atom, an iodine atom, or a combination thereof; RF is a C1-20 linear perfluoroalkyl group, optionally interrupted by an etheric oxygen atom; a is an integer of from 0 to 20; b is an integer of from 1 to 200; and c is an integer of from 3 to 200.

Abstract: Provided is an ether composition containing at least two ether compounds each of which has from 1 to 4 groups represented by formula (X) and from 0 to 3 groups represented by formula (Z), where the total number of groups represented by formula (X) and (Z) is 4: HO—(CH2CH2O)a.(CH2CH(OH)CH2O)b-Q-??(X), CF3(CF2)sO(CF2CF2O)g—??(Z), where a, b, s, g and Q are defined herein. The ratio (CF3/(OH+CF3)) of the total molar amount of CF3 groups in the groups represented by formula (Z) to the sum of the total molar amount of CF3 groups in the groups represented by formula (Z) and the total molar amount of OH groups in the groups represented by formula (X) is from 0.01 to 0.5.

Abstract: To provide a surface treating agent and a composition for surface treatment capable of forming a coating film excellent in the water/oil repellency, the efficiency for removal of oil-and-fat stains, alkali resistance and heat resistance and having a low coefficient of friction; a method for treating the surface of an article by using the surface treating agent or the composition for surface treatment; an article having surface treatment applied; and a novel fluorinated ether compound useful as a surface treating agent. A surface treating agent comprising a compound represented by the following formula (A): RFO(CF2CF2O)aCF2C(O)N(H)b(-Q-OC(O)C(R)?CH2)2-b??(A) wherein RF is a C1-20 perfluoro monovalent saturated hydrocarbon group or the like; a is an integer of from 1 to 200; b is 0 or 1; Q is a C1-6 alkylene group or the like; and R is a hydrogen atom or a C1-3 alkyl group.

Abstract: Obtaining a crosslinked rubber with high flexibility at low temperature includes crosslinking a fluororubber composition. The fluororubber composition includes a fluororubber and a compound of formula (X—)x(Z—)zY. In the formula, X is U—(CF2)aO(CF2CF2O)b—; Z is RFO(CF2CF2O)c—; Y is a (x+z) valent perfluoro saturated hydrocarbon group, optionally interrupted by an etheric oxygen atom; x is an integer of at least 3; z is an integer of at least 0; U is a monovalent group with an unsaturated hydrocarbon, a bromine atom, an iodine atom, or a combination thereof; RF is a C1-20 linear perfluoroalkyl group, optionally interrupted by an etheric oxygen atom; a is an integer of from 0 to 20; b is an integer of from 1 to 200; and c is an integer of from 3 to 200.

Abstract: To provide an ether compound which is capable of maintaining high adhesion to a base material even in the presence of moisture, and a lubricant and a composition for a lubricant, containing the ether compound. An ether compound represented by (X—)s(W—)t(Z—)uY is used. X=a group having the following formula (X0) at the terminal thereof, W=a group having HO—CH2CF2O— at the terminal thereof, Z=a group having CF3(CF2)a3O— at the terminal thereof, Y=a (s+t+u) valent perfluorinated hydrocarbon group or the like, s=1 to 7, t=0 to 4, u=0 to 2, (s+t+u)=2 to 7, a3=0 to 19, and R1 to R5=a hydrogen atom, a fluorine atom, etc.

Abstract: The present invention provides novel polymers obtained by polymerizing a compound of formula (1) which has a highly fluorinated norbornane structure.

Abstract: To provide a novel polymerizable fluorocompound having a highly fluorinated norbornane structure, and a polymer obtained from the compound. Further, their production processes and a novel intermediate useful for the processes. A novel compound (1) such as a compound (11) or a compound (12), and its polymer. A compound (2) such as a compound (21) or (22), and a compound (3) such as a compound (31) or (32M), which are useful as an intermediate for the production of the compound (1), and its production process. However, each of ZA to ZE represents such as —CH(—OC(O)C(CH3)?CH2)— or —CF2, Each of WA and WB represents such as F, each of YA to YE represents such as —CH(—OH)— or —CF(CH2OH), and each of XA to XE represents such as —C(O)— or —CF2—.

Abstract: To provide a surface treating agent and a composition for surface treatment capable of forming a coating film excellent in the water/oil repellency, the efficiency for removal of oil-and-fat stains, alkali resistance and heat resistance and having a low coefficient of friction; a method for treating the surface of an article by using the surface treating agent or the composition for surface treatment; an article having surface treatment applied; and a novel fluorinated ether compound useful as a surface treating agent. A surface treating agent comprising a compound represented by the following formula (A): RFO(CF2CF2O)aCF2C(O)N(H)b(-Q-OC(O)C(R)?CH2)2-b??(A) wherein RF is a C1-20 perfluoro monovalent saturated hydrocarbon group or the like; a is an integer of from 1 to 200; b is 0 or 1; Q is a C1-6 alkylene group or the like; and R is a hydrogen atom or a C1-3 alkyl group.

Abstract: To provide an ether composition containing no —OCF2O— structure, having a low viscosity and being excellent in chemical stability in a wide temperature range. An ether composition comprising a polyether compound (A) containing at least two —(OCF2CF2)— units, containing no —OCF2O— structure and having an average molecular weight of higher than 2,000 and at most 20,000, and an ether compound (B) containing at least one —(OCF2CF2)— unit and having an average molecular weight of at most 2,000.

Abstract: To provide a method for producing a perfluoro compound having hydroxyl groups, whereby agglomeration of a reduction reaction intermediate tends not to occur during a reduction reaction, and a perfluoro compound having —C(?O)OH can be used as a starting material. Reducing (A-C(?O)=Q=)nRfn in the presence of a metal hydride and an inorganic salt of lithium in an alcohol solvent to obtain (B—CH(OH)-Q-)n-m,(A-C(?O)-Q-)mRfn, wherein A is a hydroxyl group, a C1-5 alkoxy group, a hydrogen atom, a C1-5 alkyl group or the like, Q is a perfluoroalkylene group or the like, n is an integer of at least 1, m is an integer at least 0 and less than n, Rfn is an n valent perfluoro saturated hydrocarbon group or the like, and B is a group depending on A wherein when A is a hydroxyl group, a C1-5 alkoxy group or the like, B is a hydrogen atom, and when A is a hydrogen atom, a C1-5 alkyl group or the like, B is the same group as A.

Abstract: Provided is a lubricant solution for a magnetic recording media, wherein the lubricant solution includes a lubricant that is excellent in chemical stability and capable of imparting excellent lubricity to the lubricant solution, and a solvent having a suitable dissolving power for the lubricant, being excellent in drying properties and not influential over the ozone layer. Also provided is a lubricant solution including a lubricant and a fluorinated alkyl ether. Further provided is a lubricant solution including a compound of the formula (HO—CH2—CF2(OCF2CF2)dO—)3Y, wherein Y is a trivalent perfluorohydrocarbon group, as the lubricant and 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether as the fluorinated alkyl ether.

Abstract: To provide an ether composition having a high fixative to a substrate, which has a low surface friction coefficient when formed into a coating film, and a lubricant. An ether composition comprising at least two ether compounds (A) each of which has from 1 to 4 groups represented by the following formula (X) and from 0 to 3 groups represented by the following formula (Z), with the total of the groups represented by the formula (X) and the groups represented by the formula (Z) being 4: HO—(CH2CH2O)a.(CH2CH(OH)CH2O)b-Q-??(X), CF3(CF2)sO(CF2CF2O)g—??(Z), provided that in the above formulae (X) and (Z), a is an integer of from 0 to 100, b is 0 or 1, s is an integer of from 0 to 19, g is an integer of from 3 to 200, and Q is a polyfluorinated polymethylene group or a polyfluorinated polymethylene group having an etheric oxygen atom.

Abstract: An ether composition and a lubricant which bond to substrates with a high bonding ratio and form a coating having a low friction coefficient surface are provided. An ether composition comprising at least two compounds selected from (X—)3Y3, (X—)2Y3—Z and X—Y3(—Z)2 wherein the total number of moles of CF3 groups in Z in relation to the sum of the total number of moles of CF3 groups in Z and the total number of moles of OH groups in X is at least 0.001 and at most 0.30. X is HO—(CH2CH2O)a.(CH2CH(OH)CH2O)b-Q-, Y3 is a perfluoroalkane-triyl group, and Z is CF3(CF2)sO(CF2CF2O)g—, wherein a is an integer of from 0 to 100, b is 0 or 1, s is an integer of from 0 to 19, g is an integer of from 3 to 200, and Q is a polyfluorinated polymethylene group or a polyfluorinated polymethylene group having an etheric oxygen atom bonded between carbon-carbon atoms and/or an etheric oxygen atom bonded to the terminal carbon atom bonded to Y3.

Abstract: It is to provide a compound which has a low vapor pressure and low viscosity, which is less problematic in deterioration during its use and which is useful as e.g. a lubricant, a surface modifier or a surfactant. A fluoropolyether compound represented by the formula (X—)xY(—Z)z, wherein X is a group represented by the formula HO—(CH2CH2O)a.(CH2CH(OH)CH2O)b—(CH2)c—CF2O(CF2CF2O)d— (wherein “a” is an integer of from 0 to 100, b is an integer of from 0 to 100, c is an integer of from 1 to 100, and d is an integer of from 1 to 200), Z is a group represented by the formula RFO(CF2CF2O)g— (wherein RF is e.g. a C1-20 perfluoroalkyl group having an etheric oxygen atom inserted between carbon-carbon atoms, and g is an integer of from 3 to 200), Y is e.g. a (x+z) valent perfluorinated saturated hydrocarbon group, x is an integer of at least 2, z is an integer of at least 0, and (x+z) is an integer of from 3 to 20.

Abstract: To provide a novel polymerizable fluorocompound having a highly fluorinated norbornane structure, and a polymer obtained from the compound. Further, their production processes and a novel intermediate useful for the processes. A novel compound (1) such as a compound (11) or a compound (12), and its polymer. A compound (2) such as a compound (21) or (22), and a compound (3) such as a compound (31) or (32M), which are useful as an intermediate for the production of the compound (1), and its production process. However, each of ZA to ZE represents such as —CH(—OC(O)C(CH3)?CH2)— or —CF2, Each of WA and WB represents such as F, each of YA to YE represents such as —CH(—OH)— or —CF(CH2OH), and each of XA to XE represents such as —C(O)— or —CF2—.

Abstract: The present invention provides a process for producing compounds useful as raw materials for various fluororesins in high yields in few steps from inexpensive and readily available starting materials. The following compound (1) and the following compound (2) are reacted to form the following compound (3), then the compound (3) is fluorinated in a liquid phase to form the following compound (4), and the ester bonds in the compound (4) are dissociated to form the compound (5), or the compound (5) and the compound (6). HOCH2-Q-O—(CH2)3—OH??(1), CRBCOX??(2), RBCOOCH2-Q-O—(CH2)3—OCORB??(3), RBFCOOCF2-QF-O—(CF2)3—OCORBF??(4), FCO-QF-O—(CF2)2—COF??(5), RBFCOF??(6).

Abstract: The present invention provides a process whereby fluorine atom-containing sulfonyl fluoride compound(s) useful as e.g. materials for ion-exchange membranes, can be produced efficiently and at low cost without structural limitations while solving the difficulties in production. Namely, the present invention provides a process which comprises reacting XSO2RA-E1 (1) with RB-E2 (2) to form XSO2RA-E-RB (3), then reacting (3) with fluorine in a liquid phase to form FSO2RAF-EF-RBF (4), and further, decomposing the compound to obtain FSO2RAF-EF1 (5), wherein RA is a bivalent organic group, E1 is a monovalent reactive group, RB is a monovalent organic group, E2 is a monovalent reactive group which is reactive with E1, E is a bivalent connecting group formed by the reaction of E1 with E2, RAF is a bivalent organic group formed by the fluorination of RA, etc., RBF is the same group as RB, etc., EF is a bivalent connecting group formed by the fluorination of E, etc.

Abstract: The present invention provides a process whereby fluorine atom-containing sulfonyl fluoride compound(s) useful as e.g. materials for ion-exchange membranes, can be produced efficiently and at low cost without structural limitations while solving the difficulties in production. Namely, the present invention provides a process which comprises reacting XSO2RA-E1 (1) with RB-E2 (2) to form XSO2RA-E-RB (3), then reacting (3) with fluorine in a liquid phase to form FSO2RAF-EF-RBF (4), and further, decomposing the compound to obtain FSO2RAF-EF1 (5), wherein RA is a bivalent organic group, E1 is a monovalent reactive group, RB is a monovalent organic group, E2 is a monovalent reactive group which is reactive with E1, E is a bivalent connecting group formed by the reaction of E1 with E2, RAF is a bivalent organic group formed by the fluorination of RA, etc., RBF is the same group as RB, etc., EF is a bivalent connecting group formed by the fluorination of E, etc.

Abstract: The present invention provides a process whereby fluorine atom-containing sulfonyl fluoride compound(s) useful as e.g. materials for ion-exchange membranes, can be produced efficiently and at low cost without structural limitations while solving the difficulties in production. Namely, the present invention provides a process which comprises reacting XSO2RA-E1 (1) with RB-E2 (2) to form XSO2R4-E-RB (3), then reacting (3) with fluorine in a liquid phase to form FSO2RAF-EF-RBF (4), and further, decomposing the compound to obtain FSO2RAF-EFl (5), wherein RA is a bivalent organic group, E1 is a monovalent reactive group, RB is a monovalent organic group, E2 is a monovalent reactive group which is reactive with E1, E is a bivalent connecting group formed by the reaction of E1 with E2, RAF is a bivalent organic group formed by the fluorination of RA, etc., RBF is the same group as RB, etc., EF1 is a bivalent connecting group formed by the fluorination of E, etc.