Abstract: Provided is a fluoropolyether-based curable composition comprising: (A) a perfluoropolyether compound having at least two alkenyl groups per molecule; (B) a fluorinated organohydrosilane compound represented by general formula (1) and having at least two hydrosilyl groups (in the formula, Rf represents a monovalent perfluoropolyether group; A represents a bivalent organic group; R represents a monovalent hydrocarbon group; x represents 1 to 3; B represents a monovalent organic group having a diorganohydrosilyl group and forms a silalkylene structure in conjunction with a silicon atom to which B is linked; and y represents 1 or 2); and (C) a platinum-group metal-based catalyst.

Abstract: A perfluoropolyether-based rubber composition which gives cured objects excellent in terms of heat resistance, low-temperature resistance, organic-solvent resistance, and acid resistance, the rubber composition being characterized by comprising (a) a linear perfluoropolyether compound having a number-average molecular weight of 1,000-100,000 and including at least two azido groups in the molecule and a divalent perfluoroalkyl ether structure in the main chain and (b) a linear perfluoropolyether compound having at least three ethynyl groups in the molecule.

Abstract: The present invention provides an article having a water- and oil-repellent surface layer, as well as excellent water- and oil-repellent properties, abrasion resistance, and slipperiness, said article being constituted from: a plastic substrate; an underlayer formed upon the outer surface of the plastic substrate and having a silicon oxide as the main component thereof; and a water- and oil-repellent surface layer formed upon the outer surface of the silicon oxide underlayer. The film density of the silicon oxide underlayer is 1.8-2.2 g/cm3. The film thickness of the silicon oxide underlayer is 80-300 nm. The water- and oil-repellent surface layer has, as the main component thereof: a fluoropolyether group-containing polymer having a hydrolyzable silyl group with a specific structure; and/or a cured product of a partially hydrolyzed condensate thereof.

Abstract: The present invention provides an article having a water- and oil-repellent surface layer, as well as excellent water- and oil-repellent properties, abrasion resistance (resistance to abrasion by eraser), and slipperiness, said article being constituted from: a glass substrate; an underlayer formed upon the outer surface of the glass substrate and having a silicon oxide as the main component thereof; and a water- and oil-repellent surface layer formed upon the outer surface of the silicon oxide underlayer. The film density of the silicon oxide underlayer is 1.8-2.2 g/cm3. The water- and oil-repellent surface layer has, as the main component thereof: a fluoropolyether group-containing polymer having a hydrolyzable silyl group with a specific structure; and/or a cured product of a partially hydrolyzed condensate thereof.

Abstract: A perfluoropolyether-based rubber composition which gives cured objects excellent in terms of heat resistance, low-temperature resistance, organic-solvent resistance, and acid resistance, the rubber composition being characterized by comprising (a) a linear perfluoropolyether compound having a number-average molecular weight of 1,000-100,000 and including at least two azido groups in the molecule and a divalent perfluoroalkyl ether structure in the main chain and (b) a linear perfluoropolyether compound having at least three ethynyl groups in the molecule.

Abstract: This novel fluorine-including organohydrosilane compound is represented by formula (1), has two or more hydrosilyl groups, has a feature wherein the inter-Si links all comprise silalkylene structures, has good compatibility with base oils, and provides a fluoropolyether-based cured product having good characteristics. (Rf is a monovalent perfluoropolyether group; A is a divalent organic group that may include at least one element selected from O, N, and Si; R is a C1-6 monovalent hydrocarbon group; n is an integer from 1 to 3; each B is a monovalent silicon-including organic group that has two or more diorganohydrosilyl groups when n is 1, independently has one or more diorganohydrosilyl groups when n is 2 or 3, and forms a silalkylene structure with the silicon atom linked thereto; and y is 1 or 2.

Abstract: This perfluoropolyether-based adhesive composition contains: (A) a linear perfluoropolyether compound containing two or more alkenyl groups in one molecule and having a number average molecular weight of 2,000 or more and a weight loss ratio of 1% or less when heated at 150° C. for 1 hour; (B) a fluorine-containing organohydrogenpolysiloxane compound which contains at least one fluorine-containing organic group, and does not contain an epoxy group and a trialkoxysilyl group, and which has a number average molecular weight of 1,000-4,000 and a weight loss ratio of 20% or less when heated at 150° C.

Abstract: An alkali-resistant water repellent member according to the present invention has: a silica layer on at least one surface of a base material, said silica layer having a film thickness of from 1 nm to 5 ?m, while containing 50% by mass or more of silica nanoparticles and 1% by mass or more of an organosilicon compound that has a plurality of silanol groups in each molecule; and a water repellent oil repellent layer on the outer surface of the silica layer, said water repellent oil repellent layer having a film thickness of from 0.5 nm to 30 nm, while being mainly composed of a cured product of a hydrolyzable fluorine-containing organosilicon compound. This alkali-resistant water repellent member is able to easily provide various base materials with a water repellent oil repellent coating film in a stable manner, said coating film having excellent alkali resistance and wet wear resistance.

Abstract: A perfluoropolyether-based rubber composition which gives cured objects excellent in terms of heat resistance, low-temperature resistance, organic-solvent resistance, and acid resistance, the rubber composition being characterized by comprising (a) a linear perfluoropolyether compound having a number-average molecular weight of 1,000-100,000 and including at least two azido groups in the molecule and a divalent perfluoroalkyl ether structure in the main chain and (b) a linear perfluoropolyether compound having at least three ethynyl groups in the molecule.

Abstract: An azide group-containing fluoropolymer of formula (1) having a perfluoropolyether group of specific molecular structure as the backbone and terminated with an azide group via methylene group is provided.

Abstract: A silicone-modified polybenzoxazole resin comprising repeating units of formulae (1a) and (1b) is prepared by addition polymerization. R1 to R4 are a C1-C8 monovalent hydrocarbon group, m and n are integers of 0-300, R5 is C1-C8 alkylene or phenylene, a and b are positive numbers of less than 1, a+b=1, and X1 is a divalent linker of formula (2). The resin is flexible, soluble in organic solvents, and easy to use.

Abstract: An azide group-containing fluoropolymer of formula (1) having a perfluoropolyether group of specific molecular structure as the backbone and terminated with an azide group via methylene group is provided.

Abstract: A silicone-modified polybenzoxazole resin comprising repeating units of formulae (1a) and (1b) is prepared by addition polymerization. R1 to R4 are a C1-C8 monovalent hydrocarbon group, m and n are integers of 0-300, R5 is C1-C8 alkylene or phenylene, a and b are positive numbers of less than 1, a+b=1, and X1 is a divalent linker of formula (2). The resin is flexible, soluble in organic solvents, and easy to use.