Abstract: To provide a fluorinated compound having an RF group with at most 6 carbon atoms, whereby a fluorinated polymer having a highly durable water/oil repellency can be produced, and an environmental load is little, and a fluorinated polymer and a fluorinated copolymer having a highly durable water/oil repellency and presenting little environmental load, obtainable by polymerizing such a fluorinated compound. A fluorinated compound represented by the following formula (I) and its polymer: CH2?C(M)COO(CH2)nPhCOO(CH2)mCrF2r+1??(I) (in the formula (I), M is a hydrogen atom, a methyl group or a halogen atom, n is an integer of from 0 to 2, Ph is a phenylene group, m is an integer of from 1 to 4, and r is an integer of from 1 to 6).

Abstract: To provide a fluorinated compound having an RF group with at most 6 carbon atoms, whereby a fluorinated polymer having a highly durable water/oil repellency can be produced, and an environmental load is little, and a fluorinated polymer having a highly durable water/oil repellency and presenting little environmental load, obtainable by polymerizing such a fluorinated compound. A fluorinated compound represented by the following formula (I) and its polymer: CH2?C(M)COOXPhCOO(CH2)mCrF2r+1??(I) (in the formula (I), M is a hydrogen atom, a methyl group or a halogen atom, X is CHR1CH2O or CH2CHR1O, R1 is a C1-4 linear or branched alkyl group or CH2OR2, R2 is a C1-4 linear or branched alkyl group, Ph is a phenylene group, m is an integer of from 1 to 4, and r is an integer of from 1 to 6).

Abstract: To provide a fluorinated compound having an RF group with at most 6 carbon atoms, whereby a fluorinated polymer having a highly durable water/oil repellency can be produced, and an environmental load is little, and a fluorinated polymer having a highly durable water/oil repellency and presenting little environmental load, obtainable by polymerizing such a fluorinated compound. A fluorinated compound represented by the following formula (I) and its polymer: CH2?C(M)COO(CH2)nPhXPhZCrF2r+1??(I) (in the formula (I), M is a hydrogen atom, a methyl group or a halogen atom, n is an integer of from 0 to 2, Ph is a phenylene group, X is CH2O or OCH2, Z is a single bond, a C1-4 alkylene group containing an etheric oxygen atom, or COO(CH2)m (wherein m is an integer of from 1 to 4), and r is an integer of from 1 to 6).

Abstract: To provide a fluorinated compound having an RF group with at most 6 carbon atoms, whereby a fluorinated polymer having a highly durable water/oil repellency can be produced, and an environmental load is little, and a fluorinated polymer and a fluorinated copolymer having a highly durable water/oil repellency and presenting little environmental load, obtainable by polymerizing such a fluorinated compound. A fluorinated compound represented by the following formula (I) and its polymer: CH2?C(M)COO(CH2)nPhCOO(CH2)mCrF2r+1??(I) (in the formula (I), M is a hydrogen atom, a methyl group or a halogen atom, n is an integer of from 0 to 2, Ph is a phenylene group, m is an integer of from 1 to 4, and r is an integer of from 1 to 6).

Abstract: A copolymer is provided which is capable of providing an article surface with sufficient oil repellency against oils having low surface tensions and which places little burden on the environment. Further, a method for producing such a copolymer, an oil repellent composition containing such a copolymer as an effective component, and an article which is excellent in oil repellency against oils having low surface tensions and which contains no material having high environmental burden, are provided. A copolymer comprising the following polymerized units (a), polymerized units (b), polymerized units (c1) and polymerized units (c2), and an oil repellent composition and article containing it.

Abstract: To provide a fluorinated compound having an RF group with at most 6 carbon atoms, whereby a fluorinated polymer having a highly durable water/oil repellency can be produced, and an environmental load is little, and a fluorinated polymer having a highly durable water/oil repellency and presenting little environmental load, obtainable by polymerizing such a fluorinated compound. A fluorinated compound represented by the following formula (I) and its polymer: CH2?C(M)COOXPhCOO(CH2)mCrF2r+1??(I) (in the formula (I), M is a hydrogen atom, a methyl group or a halogen atom, X is CHR1CH2O or CH2CHR1O, R1 is a C1-4 linear or branched alkyl group or CH2OR2, R2 is a C1-4 linear or branched alkyl group, Ph is a phenylene group, m is an integer of from 1 to 4, and r is an integer of from 1 to 6).

Abstract: To provide an oil repellent copolymer capable of forming an oil repellent film which is excellent in durability. An oil repellent copolymer characterized by comprising a repeating unit (A) having a polyfluoroalkyl group, a repeating unit (B) having a fluorescent functional group, and a repeating unit (C) having an ester bond other than an ester bond derived from acrylic acid, and/or a hydroxyl group.

Abstract: To provide a polymerizable fluorine-containing compound useful for producing a treated substrate having a hydrophilic region and a water repellent region, of which the contrast is high on its surface, without requiring a special apparatus, high energy light, or irradiation with light for a long time. A polymerizable fluorine-containing compound, which is a derivative of a polyhydric alcohol and comprises at least one following structure (A) and at least one following structure (B) in its molecule: structure (A): a structure wherein a compound having a fluoroalkyl group and a carboxyl group is bonded to one hydroxyl group of a polyhydric alcohol by an ester linkage, structure (B): a structure wherein a compound having an ethylenic double bond and a carboxyl group is bonded to one hydroxyl group of a polyhydric alcohol by an ester linkage or a structure wherein a compound having an ethylenic double bond and an isocyanate group is bonded to one hydroxyl group of a polyhydric alcohol by a urethane bond.

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 a fluorinated compound having an RF group with at most 6 carbon atoms, whereby a fluorinated polymer having a highly durable water/oil repellency can be produced, and an environmental load is little, and a fluorinated polymer having a highly durable water/oil repellency and presenting little environmental load, obtainable by polymerizing such a fluorinated compound. A fluorinated compound represented by the following formula (I) and its polymer: CH2?C(M)COO(CH2)nPhXPhZCrF2r+1??(I) (in the formula (I), M is a hydrogen atom, a methyl group or a halogen atom, n is an integer of from 0 to 2, Ph is a phenylene group, X is CH2O or OCH2, Z is a single bond, a C1-4 alkylene group containing an etheric oxygen atom, or COO(CH2)m (wherein m is an integer of from 1 to 4), and r is an integer of from 1 to 6).

Abstract: To provide a fluorinated compound having an RF group with at most 6 carbon atoms, whereby a fluorinated polymer having a highly durable water/oil repellency can be produced, and an environmental load is little, and a fluorinated polymer and a fluorinated copolymer having a highly durable water/oil repellency and presenting little environmental load, obtainable by polymerizing such a fluorinated compound. A fluorinated compound represented by the following formula (I) and its polymer: CH2?C(M)COO(CH2)nPhCOO(CH2)mCF2r+1??(I) (in the formula (I), M is a hydrogen atom, a methyl group or a halogen atom, n is an integer of from 0 to 2, Ph is a phenylene group, m is an integer of from 1 to 4, and r is an integer of from 1 to 6).

Abstract: To provide a fluorinated compound having an RF group with at most 6 carbon atoms, whereby a fluorinated polymer having a highly durable water/oil repellency can be produced, and an environmental load is little, and a fluorinated polymer having a highly durable water/oil repellency and presenting little environmental load, obtainable by polymerizing such a fluorinated compound. A fluorinated compound represented by the following formula (I) and its polymer: CH2?C(CH3)COO(CH2)nPhXCrF2r+i??(I) (in the formula (I), n is an integer of from 0 to 2, Ph is a phenylene group, X is a single bond or a C1-4 alkylene group containing an etheric oxygen atom, and r is an integer of from 2 to 6).

Abstract: To provide a water/oil repellent agent and a water/oil repellent composition which is capable of providing an article surface with a sufficient water/oil repellency, while placing little burden on the environment. One comprising a reaction product obtained by reacting a fluoromonool having a polyfluoroalkyl moiety having at most 6 carbon atoms as an alcohol, an alkane monool having at least 18 carbon atoms, and MDI or a polymeric MD, and by treating an article with such a water/oil repellent agent, a sufficient water/oil repellency can be imparted, while placing little burden on the environment. By treating the above-mentioned article with the water/oil repellent composition of the present invention, a high quality water/oil repellency can be imparted to the article.

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: A copolymer is provided which is capable of providing an article surface with sufficient oil repellency against oils having low surface tensions and which places little burden on the environment. Further, a method for producing such a copolymer, an oil repellent composition containing such a copolymer as an effective component, and an article which is excellent in oil repellency against oils having low surface tensions and which contains no material having high environmental burden, are provided. A copolymer comprising the following polymerized units (a), polymerized units (b), polymerized units (c1) and polymerized units (c2), and an oil repellent composition and article containing it.

Abstract: An electrolyte material for polymer electrolyte fuel cells, which is made of a polymer containing repeating units based on a fluoromonomer having a radical polymerization reactivity, wherein the repeating units contain a 5-membered ring (which may contain 1 or 2 oxygen atoms), of which at least one carbon atom is contained in the main chain of the polymer, and an ionic group such as a sulfonic acid group which is bonded to the 5-membered ring directly or via a perfluoroalkylene group having a linear or branched structure; and the polymer has a softening temperature of at least 120° C.

Abstract: A process for producing a polyfluoroalkyl (meth)acrylate, which comprises isolating, from a reaction mixture containing a polyfluoroalkyl (meth)acrylate obtained by reacting a polyfluoroalkyl iodide of the formula CnF2n+1(CH2)mI (wherein n is an integer of from 2 to 7, and m is an integer of from 1 to 4) with a metal (meth)acrylate in tert-butanol, said polyfluoroalkyl (meth)acrylate by the following steps (1) to (3): (1) a step of taking out a crude liquid from the reaction mixture by solid-liquid separation; (2) a step of distilling the crude liquid to separate it into compound group A of compounds having a lower boiling point than the polyfluoroalkyl (meth)acrylate and compound group B of the polyfluoroalkyl (meth)acrylate and compounds having a higher boiling point than the polyfluoroalkyl (meth)acrylate; and (3) a step of distilling and purifying the polyfluoroalkyl (meth)acrylate from the compound group B in the presence of a polymerization inhibitor.

Abstract: To provide an oil repellent copolymer capable of forming an oil repellent film which is excellent in durability. An oil repellent copolymer characterized by comprising a repeating unit (A) having a polyfluoroalkyl group, a repeating unit (B) having a fluorescent functional group, and a repeating unit (C) having an ester bond other than an ester bond derived from acrylic acid, and/or a hydroxyl group.

Abstract: To provide a polymerizable fluorine-containing compound useful for producing a treated substrate having a hydrophilic region and a water repellent region, of which the contrast is high on its surface, without requiring a special apparatus, high energy light, or irradiation with light for a long time. A polymerizable fluorine-containing compound, which is a derivative of a polyhydric alcohol and comprises at least one following structure (A) and at least one following structure (B) in its molecule: structure (A): a structure wherein a compound having a fluoroalkyl group and a carboxyl group is bonded to one hydroxyl group of a polyhydric alcohol by an ester linkage, structure (B): a structure wherein a compound having an ethylenic double bond and a carboxyl group is bonded to one hydroxyl group of a polyhydric alcohol by an ester linkage or a structure wherein a compound having an ethylenic double bond and an isocyanate group is bonded to one hydroxyl group of a polyhydric alcohol by a urethane bond.

Abstract: A process for producing a polyfluoroalkyl (meth)acrylate, which comprises isolating, from a reaction mixture containing a polyfluoroalkyl (meth)acrylate obtained by reacting a polyfluoroalkyl iodide of the formula CnF2n+1(CH2)mI (wherein n is an integer of from 2 to 7, and m is an integer of from 1 to 4) with a metal (meth)acrylate in tert-butanol, said polyfluoroalkyl (meth)acrylate by the following steps (1) to (3): (1) a step of taking out a crude liquid from the reaction mixture by solid-liquid separation; (2) a step of distilling the crude liquid to separate it into compound group A of compounds having a lower boiling point than the polyfluoroalkyl (meth)acrylate and compound group B of the polyfluoroalkyl (meth)acrylate and compounds having a higher boiling point than the polyfluoroalkyl (meth)acrylate; and (3) a step of distilling and purifying the polyfluoroalkyl (meth)acrylate from the compound group B in the presence of a polymerization inhibitor.