Abstract: Provided is a method for forming a coating film of a photocurable fluoropolyether-based elastomer composition, with which a uniform cured product of the composition can be obtained even in an interface, dark portion and deep portion of a base material without being subjected to a curing inhibition from the base material (resin base material in particular). The method for forming the coating film of the photocurable fluoropolyether-based elastomer composition includes a step of applying a light-irradiated photocurable fluoropolyether-based elastomer composition to a surface of a base material.

Abstract: A fluorochemical coating composition is provided comprising (A) a hydrolyzable group-containing silane modified with a fluorooxyalkylene-containing polymer and (B) a fluorooxyalkylene-containing polymer having an average molecular weight not higher than the average molecular weight of component (A) in a weight ratio (A)/(B) of 40/60 to 95/5. The composition forms on a substrate a water/oil repellent layer which does not detract from the visibility of the substrate.

Abstract: A perfluoropolyether-modified polysilazane of silazane units of formula (1), where Q is a divalent organic group, p and q are an integer of at least 1, r and s are an integer of at least 0, and x is an integer of 1 to 3. A surface treating agent comprising the polysilazane is improved in water/oil repellency, surface slip and smear wipe-off. F(CF2O)p(CF2CF2O)q(CF2CF2CF2O)r(CF2CF2CF2CF2O)s—CxF2x-Q-Si(NH)1.

Abstract: An object of the present invention is to provide a method for efficiently and highly selectively preparing a composition comprising perfluoropolyether having a hydroxyl group at one terminal at a higher ratio. The present invention provides a method for increasing a ratio of perfluoropolyether having a hydroxyl group at one terminal, relative to a total amount of the perfluoropolyether having a hydroxyl group at one terminal and perfluoropolyether having hydroxyl groups at both terminals in a composition comprising these perfluoropolyethers, wherein the method comprises a step of subjecting the composition to chromatography in which a moving phase is supercritical or subcritical state carbon dioxide of the specific temperature and the specific pressure, and a stationary phase is silica gel to thereby collect a fraction containing the perfluoropolyether having a hydroxyl group at one terminal at a higher ratio.

Abstract: A fluorochemical surface treating agent comprising a hydrolyzable group-containing silane modified with a fluorooxyalkylene-containing polymer and/or a partial hydrolytic condensate thereof forms a water/oil repellent layer having chemical resistance and mar resistance.

Abstract: The invention provides a surface treatment agent wherein a fluorooxyalkylene group-containing polymer or a fluorooxyalkylene group-containing polymer composition comprising the polymers, which is controlled of a temperature range of vaporization of fluorooxyalkylene group-containing polymer(s). The fluorooxyalkylene group-containing polymer has a fluorooxyalkylene structure represented by —(OCF2)p(OCF2CF2)q— and hydrolysable groups bond to a silicon atom represented by the formula at least one terminal. The polymer composition shows a decrease of 75% or more in weight, relative to the total weight of the polymer, in a temperature range of from 150 to 350 degrees C. when this is heated at a rate of 2 degrees C. per minute and a pressure of 0.1 Pa or less. The present surface treatment agent forms a coating having water- and oil-repellency and scratch resistance regardless of a vapor deposition conditions, in particularly by a vapor deposition at a mild temperature such as 350 degrees C.

Abstract: There is disclosed a fluorine-based surface treating agent for vapor deposition comprising (A) a hydrolyzable group-containing silane modified with a polymer containing a fluorooxyalkylene group and/or a partial hydrolytic condensate, and (B) a polymer containing a fluorooxyalkylene group having a higher weight average molecular weight than component (A), wherein components (A) and (B) are mixed in a weight ratio of from 6:4 to 9:1.

Abstract: A fluorochemical surface treating agent comprising a hydrolyzable group-containing silane modified with a fluorooxyalkylene-containing polymer and/or a partial hydrolytic condensate thereof forms a water/oil repellent layer having chemical resistance and mar resistance.

Abstract: An object of the present invention is to provide a method for efficiently and highly selectively preparing a composition comprising perfluoropolyether having a hydroxyl group at one terminal at a higher ratio. The present invention provides a method for increasing a ratio of perfluoropolyether having a hydroxyl group at one terminal, relative to a total amount of the perfluoropolyether having a hydroxyl group at one terminal and perfluoropolyether having hydroxyl groups at both terminals in a composition comprising these perfluoropolyethers, wherein the method comprises a step of subjecting the composition to chromatography in which a moving phase is supercritical or subcritical state carbon dioxide of the specific temperature and the specific pressure, and a stationary phase is silica gel to thereby collect a fraction containing the perfluoropolyether having a hydroxyl group at one terminal at a higher ratio.

Abstract: A fluorochemical coating composition is provided comprising (A) a hydrolyzable group-containing silane modified with a fluorooxyalkylene-containing polymer and (B) a fluorooxyalkylene-containing polymer having an average molecular weight not higher than the average molecular weight of component (A) in a weight ratio (A)/(B) of 40/60 to 95/5. The composition forms on a substrate a water/oil repellent layer which does not detract from the visibility of the substrate.

Abstract: A surface modifier comprising an organosilicon-containing fluoropolymer having formula (1), partial hydrolyzate or hydrolytic condensate thereof is provided. In formula (1), Rf is perfluoroalkyl, OA is OCF2CF2CF2CF2, OCF2CF2CF2, OCF(CF3)CF2, OCF2CF2 or OCF2, X is F or CF3, p=1-200, q=0, 1 or 2, r=1-5, h=0-4, k=2-16, m=2 or 3, R1 is H or a hydrocarbon group, R2 and R3 are hydrocarbon groups, and Z is a hydrolyzable group. The surface modifier is coated on a substrate to form a coating having water/oil repellency, quick water slip, UV resistance, heat resistance, and chemical resistance.

Abstract: The invention provides a surface treatment agent wherein a fluorooxyalkylene group-containing polymer or a fluorooxyalkylene group-containing polymer composition comprising the polymers, which is controlled of a temperature range of vaporization of fluorooxyalkylene group-containing polymer(s). The fluorooxyalkylene group-containing polymer has a fluorooxyalkylene structure represented by —(OCF2)p(OCF2CF2)q— and hydrolysable groups bond to a silicon atom represented by the formula at least one terminal. The polymer composition shows a decrease of 75% or more in weight, relative to the total weight of the polymer, in a temperature range of from 150 to 350 degrees C. when this is heated at a rate of 2 degrees C. per minute and a pressure of 0.1 Pa or less. The present surface treatment agent forms a coating having water- and oil-repellency and scratch resistance regardless of a vapor deposition conditions, in particularly by a vapor deposition at a mild temperature such as 350 degrees C.

Abstract: The invention provides a surface modifier comprising an organosilicon-containing fluoropolymer compound having formula (1), a hydrolyzate thereof, or a partial hydrolytic condensate thereof. When an article is treated the surface modifier, the surface modifier forms thereon a coating having water/oil repellency and quick water slip as well as UV resistance, heat resistance, and chemical resistance.

Abstract: A fluorooxyalkylene group-containing polymer composition including a liner fluorooxyalkylene group-containing polymer represented by the formula (1) which has a hydrolysable group at a terminal and is hereinafter called “one-terminal modified polymer”, and a liner fluorooxyalkylene group-containing polymer represented by the following formula (2) which has hydrolysable groups at the both terminals and is hereinafter called “both-terminal modified polymer”, wherein an amount of the both-terminal modified polymer is 0.1 mole % or more and less than 10 mole %, relative to a total mole of the one-terminal modified polymer and the both-terminal modified polymer.

Abstract: A fluorine-containing curable composition which is less viscous, and which can produce a cured article having excellent heat resistance, chemical resistance, solvent resistance, and mechanical strength is provided. The fluorine-containing curable composition comprises (a) 100 parts by weight of a straight chain fluorine-containing polymer having at least two alkenyl groups per molecule represented by the following formula (1): said polymer having a number average molecular weight of 1,000 to 100,000; (b) a fluorine-containing organosilicon compound having at least 2 hydrogen atoms bonded to the silicon atom per molecule at an amount such that molar ratio of hydrosilyl group (SiH group) in the component (b) to the alkenyl group in the component (a) is in the range of 0.4 to 5.0; (c) a catalytic amount of a hydrosilylation catalyst; and (d) 1 to 100 parts by weight of a silica filler.

Abstract: A perfluoropolyether-modified polysilazane consists of silazane units having the formula: F(CF2O)p(CF2CF2O)q(CF2CF2CF2O)r(CF2CF2CF2CF2O)s—CxF2x-Q-Si(NH)1.5??(1) wherein Q is a divalent organic group, p and q are an integer of at least 1, r and s are an integer of at least 0, and x is an integer of 1 to 3. A surface treating agent comprising the polysilazane is improved in water/oil repellency, surface slip and smear wipe-off.

Abstract: There is disclosed a coating composition comprising any one or more of a fluorooxyalkylene-containing one-terminal hydrolysable polymer as shown by the following formula (1), and a fluorooxyalkylene-containing both-terminal hydrolysable polymer as shown by the following formula (2). As a result, there is provided a coating composition comprising any one or more of a fluorooxyalkylene-containing one-terminal hydrolysable polymer and a fluorooxyalkylene-containing both-terminal hydrolysable polymer, having excellent water-repellent and oil-repellent properties and chemical resistance as well as excellent scratch resistance and surface sliding property.

Abstract: A curable perfluoropolyether gel composition is provided. The composition comprises (A) a straight chain fluorine-containing polymer represented by the following formula (1): (B) a polyfluoromonoalkenyl compound containing one alkenyl group per molecule and having a perfluoropolyether structure in its backbone, (C) an organosilicon compound containing at least two hydrogen atoms bonded to the silicon atom per molecule, and (D) a hydrosilylation catalyst. The composition can be produced into a cured product having excellent heat resistance, solvent resistance, chemical resistance, weatherability, releasability, water repellency, oil repellency, and the like as well as an improved acid resistance.

Abstract: An object of the present invention is to provide a fluorooxyalkylene group-containing polymer composition, which yields a coating having excellent adhesior to a substrate, good water- and oil-repellency, a low dynamic friction coefficient, good releasing property, good abrasion resistance and good stain resistance, and to provide a surface treatment agent comprising the same. The present inventors have found that a composition comprising a fluorooxyalkylene group-containing polymer having a fluorinated group and a hydrolyzable group at each terminal and a fluorooxyalkylene group-containing polymer having hydrolyzable groups at both terminals can form a coating which has excellent water- and oil-repellency, a low dynamic friction coefficient, good releasing property, good abrasion resistance, and good stain resistance.

Abstract: A coating composition comprising a fluorine-containing silicon compound represented by the following formula (1) wherein Z is a linear or branched divalent polyorganosiloxane residue having 1 to 40 siloxane units, R is an alkyl group having 1 to 4 carbon atoms or a phenyl group, X is a hydrolyzable group, Q is a C2-12 divalent connecting group, a is an integer of 2 or 3, b is an integer of from 1 to 10, y is an integer of 1 to 5, and Rf is a group represented by the following formula (2) -Rf1-(Q-W-Q-Rf1)q-??(2) wherein Rf1 is a perfluoropolyether residue, W is an organopolysiloxane residue having 1 to 40 siloxane units and Q is as defined above and may be the same with or different from each other, and q is an integer of from 0 to 3, and at least one solvent selected from the group consisting of alcohols, esters, ethers, ketones, and perfluoroethers. The coating prepared from the composition is oil-repellent, water-repellent and has water sliding property.