Abstract: A perfluoropolyether phosphate ester represented by the general formula: [C3F7O{CF(CF3)CF2O}nCF(CF3)CH2O]2PO(OH) (wherein n is an integer of 1 to 20). This compound is obtained by reacting a perfluoropolyether alcohol represented by the general formula: C3F7O{CF(CF3)CF2O}nCF(CF3)CH2OH (wherein n is an integer of 1 to 20) with phosphorus oxychloride, and hydrolyzing the obtained compound represented by the general formula: [C3F7O{CF(CF3)CF2O}nCF(CF3)CH2O]2POCl (wherein n is an integer of 1 to 20). Moreover, the perfluoropolyether phosphate ester or a salt thereof forms a surface treatment agent comprising the perfluoropolyether phosphate ester or a salt thereof as an active ingredient.

Abstract: Problem: To provide a novel compound capable of preventing pyrolysis of fluorinated oils when it is used as an additive for the fluorinated oils. Solution Means: A compound represented by Formula (1): wherein Y represents an oxygen atom (O), a sulfur atom (S), a CO group, a SO group, or a SO2 group; k is an integer from 1 to 5; m is an integer from 1 to 10; and n is an integer of 1 or more; and wherein two substituents on each phenyl group may be in any of ortho-, meta-, and para-positions.

Abstract: Problem: To provide a novel compound capable of preventing pyrolysis of fluorinated oils when it is used as an additive for the fluorinated oils. Solution Means: A compound represented by Formula (1): wherein Y represents an oxygen atom (O), a sulfur atom (S), a CO group, a SO group, or a SO2 group; k is an integer from 1 to 5; m is an integer from 1 to 10; and n is an integer of 1 or more; and wherein two substituents on each phenyl group may be in any of ortho-, meta-, and para-positions.

Abstract: An iodine-containing fluoropolyether represented by the following general formula [I]: RfO[CF(CF3)CF2O]mCF(CF3)(CH2)nI??[I] (where Rf is a perfluoroalkyl group having 1-3 carbon atoms, m is an integer of 0-10, and n is an integer of 3-12), is a novel compound having a perfluoropolyetheralkyl group capable of giving a flexibility to the molecule chain through the etheral bond, said perfluoropolyether alkyl group being bonded to the alkyl iodide having an alkyl group having 3 or more carbon atoms, and can be produced by reaction of a fluoropolyether group-containing alcohol represented by the following general formula [II]: RfO[CF(CF3)CF2O]mCF(CF3)(CH2)nOH??[II] (Where Rf, m, and n have the same meanings as defined above) with a metal iodide, preferably potassium iodide.

Abstract: An alkylamino group-terminated fluoroether compound, represented by the following general formula: RfO[CF(CF3)CF2O]mCF(CF3)(CH2)nNR1R2 (where Rf is a perfluoro lower-alkyl group, R1 is an alkyl group having 1-12 carbon atoms, R2 is a hydrogen atom, or an alkyl group having 1-12 carbon atoms, m is an integer of 0-10, and n is an integer of 3-8) is a novel compound, and is produced by reaction of an iodide-terminated fluoroether compound, represented by the following general formula: RfO[CF(CF3)CF2O]mCF(CF3)(CH2)nI with an alkylamine compound, represented by the following general formula: NHR1R2.

Abstract: An iodine-containing fluoropolyether represented by the following general formula [I]: RfO[CF(CF3)CF2O]mCF(CF3)(CH2)nI??[I] (where Rf is a perfluoroalkyl group having 1-3 carbon atoms, m is an integer of 0-10, and n is an integer of 3-12), is a novel compound having a perfluoropolyetheralkyl group capable of giving a flexibility to the molecule chain through the etheral bond, said perfluoropolyether alkyl group being bonded to the alkyl iodide having an alkyl group having 3 or more carbon atoms, and can be produced by reaction of a fluoropolyether group-containing alcohol represented by the following general formula [II]: RfO[CF(CF3)CF2O]mCF(CF3)(CH2)nOH??[II] (Where Rf, m, avd n have the same meanings as defined above) with a metal iodide, preferably potassium iodide.

Abstract: An alkylamino group-terminated fluoroether compound, represented by the following general formula: RfO[CF(CF3)CF2O]mCF(CF3)(CH2)nNR1R2 (where Rf is a perfluoro lower-alkyl group, R1 is an alkyl group having 1-12 carbon atoms, R2 is a hydrogen atom, or an alkyl group having 1-12 carbon atoms, m is an integer of 0-10, and n is an integer of 3-8) is a novel compound, and is produced by reaction of an iodide-terminated fluoroether compound, represented by the following general formula: RfO[CF(CF3)CF2O]mCF(CF3)(CH2)nI with an alkylamine compound, represented by the following general formula: NHR1R2

Abstract: A polyfluoroalkyl ester of unsaturated carboxylic acid is produced in high yield in a more simple reactor and with much more reduction in the waste than the conventional process based on esterification reaction by subjecting a polyfluoroalkanol represented by the following general formula: Rf—R—OH where Rf is a polyfluoroalkyl group having 1–6 carbon atoms and R is an alkylene group having 1–6 carbon atoms, and an unsaturated carboxylic acid to dehydration reaction in a fluorine-containing solvent in the presence of an acid catalyst and a polymerization inhibitor.

Abstract: A polyfluoroalkyl ester of unsaturated carboxylic acid is produced in high yield in a more simple reactor and with much more reduction in the waste than the conventional process based on esterification reaction by subjecting a polyfluoroalkanol represented by the following general formula: Rf-R—OH , where Rf is a polyfluoroalkyl group having 1-6 carbon atoms and R is an alkylene group having 1-6 carbon atoms, and an unsaturated carboxylic acid to dehydration reaction in a fluorine-containing solvent in the presence of an acid catalyst and a polymerization inhibitor.