Abstract: Adamantane derivates which can be material compounds of a polymer excellent in etching resistance and having improved transmittance to light having a short wavelength, are produced by an economically advantageous process from readily available materials. A compound (10) is subjected to esterification reaction with a compound (11) to obtain a compound (12), which is subjected to fluorination in a liquid phase to obtain a compound (13), which is then subjected to hydrolysis or alcoholysis to obtain a compound (2), which is then reacted with a compound (15) thereby to obtain a compound (1).

Abstract: The present invention provides a process A1 for producing a compound (5A), which comprises fluorinating a compound (3A-1) by liquid phase fluorination to a compound (4A-1), followed by a decomposition reaction of an ester bond; a process A2 for producing a compound (5A), which comprises fluorinating a compound (3A-2) by liquid phase fluorination to a compound (4A-2), followed by a decomposition reaction of an ester bond; and a process B for producing a compound (5B), which comprises fluorinating a compound (3B) by liquid phase fluorination to a compound (4B), followed by hydrolysis or alcoholysis. Further, the present invention provides a compound (5A) wherein n is 2 to 4, and a compound (5B) wherein n is 3 or 4.

Abstract: Adamantane derivates which can be material compounds of a polymer excellent in etching resistance and having improved transmittance to light having a short wavelength, represented by the formula (2A?) wherein Y1F is a fluorine atom or a hydroxyl group.

Abstract: To provide a fluorinated compound, which can readily form a thin film having a hydrophobic/hydrophilic pattern, by employing an ultraviolet light having a relatively low energy.

Abstract: Adamantane derivates which can be material compounds of a polymer excellent in etching resistance and having improved transmittance to light having a short wavelength, are produced by an economically advantageous process from readily available materials. A compound (10) is subjected to esterification reaction with a compound (11) to obtain a compound (12), which is subjected to fluorination in a liquid phase to obtain a compound (13), which is then subjected to hydrolysis or alcoholysis to obtain a compound (2), which is then reacted with a compound (15) thereby to obtain a compound (1).

Abstract: Adamantane derivates which can be material compounds of a polymer excellent in etching resistance and having improved transmittance to light having a short wavelength, are produced by an economically advantageous process from readily available materials. A compound (10) is subjected to esterification reaction with a compound (11) to obtain a compound (12), which is subjected to fluorination in a liquid phase to obtain a compound (13), which is then subjected to hydrolysis or alcoholysis to obtain a compound (2), which is then reacted with a compound (15) thereby to obtain a compound (1).

Abstract: To provide a fluorinated compound, which can readily form a thin film having a hydrophobic/hydrophilic pattern, by employing an ultraviolet light having a relatively low energy. A thin film having a hydrophobic/hydrophilic pattern is formed by irradiating a thin film formed by employing a fluorinated compound represented by the following formula 1 (in the formula 1, each of R1, R2, R3 and R4 which are independent of one another, is a hydrogen atom, a halogen atom or a monovalent organic group, provided that at least one of them is a monovalent organic group having fluorine atoms, and R5 is a hydrogen atom or a monovalent organic group, R6 is a monovalent organic group, and A is a hetero atom) with ultraviolet light.

Abstract: To present an electrolyte material having a high softening temperature, which is useful for obtaining a polymer electrolyte fuel cell which can be operated at a high temperature and whereby a high output power can be obtained with little catalyst poisoning. 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: The present invention provides a process A1 for producing a compound (5A), which comprises fluorinating a compound (3A-1) by liquid phase fluorination to a compound (4A-1), followed by a decomposition reaction of an ester bond; a process A2 for producing a compound (5A), which comprises fluorinating a compound (3A-2) by liquid phase fluorination to a compound (4A-2), followed by a decomposition reaction of an ester bond; and a process B for producing a compound (5B), which comprises fluorinating a compound (3B) by liquid phase fluorination to a compound (4B), followed by hydrolysis or alcoholysis. Further, the present invention provides a compound (5A) wherein n is 2 to 4, and a compound (5B) wherein n is 3 or 4.

Abstract: An aqueous dispersion comprising a polymer (a) having a repeating unit (A) which comprises four carbon atoms connected in a linear chain and which has one double bond at the second position and a polyfluoroalkyl group bonded to an arbitrary carbon atom, and a surfactant (B) having a hydrophile-lipophile balance of at least 10, wherein the polymer (a) is dispersed in an aqueous medium by the surfactant (B).

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: An aqueous dispersion comprising a polymer (a) having a repeating unit (A) which comprises four carbon atoms connected in a linear chain and which has one double bond at the second position and a polyfluoroalkyl group bonded to an arbitrary carbon atom, and a surfactant (B) having a hydrophile-lipophile balance of at least 10, wherein the polymer (a) is dispersed in an aqueous medium by the surfactant (B).