Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid excellent in chemical resistance, an article having a surface layer excellent in chemical resistance and a method for producing it, and a method for producing a fluorinated ether compound excellent in chemical resistance. A fluorinated ether compound which has a first partial structure represented by the following formula (1) and a second partial structure represented by the following formula (2), and which has at least five first partial structures, or has at least two second partial structures: —ORf12—??(1) —ORf13—??(2) wherein Rf12 is a C1-6 fluoroalkylene group, and Rf13 is a group having a fluorinated cyclic structure which may have a hetero atom.

Abstract: A surface treatment agent includes: a fluorine-containing compound (A) having a reactive silyl group; a compound (B); and a compound (C) selected from a compound (C1): R7COR8, a compound (C2), a compound (C3): R10—[OR11]q—R12, a hydrofluoroolefin (C4) having from 3 to 8 carbon atoms, and a hydrochlorofluoroolefin (C5) having from 3 to 8 carbon atoms. 0 to 3 members of R1 to R6 are fluorine-containing alkyl groups having from 1 to 3 carbon atoms, and the remaining members among R1 to R6 represent hydrogen or fluorine atoms. R7 and R8 represent a fluorine-containing alkyl group having from 1 to 5 carbon atoms. R9 represents a residue that forms a 3- to 5-membered ring structure with the carbon atom of a carbonyl group and that has a fluorine atom. R10 and R12 represent a fluorine-containing alkyl group having from 1 to 3 carbon atoms, q represents an integer of 1 or more, R11 represents a perfluoroalkylene group having from 1 to 6 carbon atoms.

Abstract: A surface treatment agent includes: a fluorine-containing compound (A) having a reactive silyl group; and at least one compound (B) selected from the group consisting of a fluorine-containing ketone compound (B1): R1COR2, a fluorine-containing cyclic ketone compound (the following B2), and a fluorine-containing polyether compound (B3): R4—[OR5]q—R6. In Formula (B1), R1 and R2 represent a fluorine-containing alkyl group having from 1 to 5 carbon atoms. In Formula (B2), R3 represents a residue that forms a 3- to 5-membered ring structure with a carbon atom of a carbonyl group and that has a fluorine atom. In Formula (B3), R4 and R6 represent a fluorine-containing alkyl group having from 1 to 3 carbon atoms, q represents an integer of 1 or more, R5 represents a perfluoroalkylene group having from 1 to 6 carbon atoms, and in a case in which q is an integer of 2 or more, plural R5s may be the same or different.

Abstract: There is provided a fluorine-containing ether compound excellent in light fastness, a surface treatment agent, a fluorine-containing ether composition, a coating liquid, an article having a surface layer excellent in light fastness, a method for producing the same, and a compound useful as a raw material of the fluorine-containing ether compound excellent in light fastness. A fluorine-containing ether compound represented by the following general formula (A). (R1R2C?CR3-L1-)n1Q1-Rf-Q2(-T)n2??Formula (A) where, each reference sign in the formula (A) is as described in the specification.

Abstract: To provide a method capable of separating a monofunctional species, bifunctional species, etc. of a fluorinated ether compound having a polyfluoropolyether chain and a predetermined functional group in good yield and with high separation performance.

Abstract: To provide a method for producing a fluorinated ether compound having a poly(oxyfluoroalkylene) chain and a sulfonate group with low impurity content and in high yield. A method for producing a fluorinated ether compound, comprising step 1 of sulfonylating a fluorinated ether compound having a poly(oxyfluoroalkylene) chain and a hydroxy group in the presence of a fluorinated solvent, a base and a sulfonylating agent to obtain a product containing a fluorinated ether compound having a poly(oxyfluoroalkylene) chain and a sulfonate group, and step 2 of contacting the product obtained in step 1 with an adsorbent having a pH of at most 8.0.

Abstract: A fluorine-containing ether compound according to the present invention is expressed by the following formula (1) or the following formula (2): Q1{—(Rf12)m2—O—(Rf11O)m1-A1}n1??Formula (1) {A1-(ORf11)m1—O—(Rf12)m2-}n2Q2-[(Rf12)m2—O—(Rf11O)m1—(Rf12)m2-Q3]p—(Rf12)m2—O—(Rf11O)m1—(Rf12)m2-Q2-{(Rf12)m2—O—(Rf11O)m1-A1}n2??Formula (2), wherein Q1, Q2, Q3, Rf11, Rf12, A1, n1, n2, m1, m2, and p are as described in the specification.

Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid capable of forming a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance, light resistance and chemical resistance, an article having a surface layer, and a method for producing it. A fluorinated ether compound represented by A-O—(Rf1O)m—Rf2-Z1-Q1 (R1)b, wherein A is a C1-20 perfluoroalkyl group, Rf1 is a linear fluoroalkylene group, m is an integer of from 2 to 500, Rf2 is a linear fluoroalkylene group, Z1 is a single bond, —(CR2R3)c— (wherein R2 and R3 are a hydrogen atom, a C1-6 monovalent organic group or the like, and c is an integer of from 1 to 10), a specific bond or a bivalent organic group having a specific bond, Q1 is a group having a (b+1) valent ring, R1 is a monovalent organic group having at least one hydrolyzable silyl group, and b is an integer of at least 2.

Abstract: Provided are a fluorine-containing ether compound, a fluorine-containing ether composition, and a coating liquid, which can form a surface layer having excellent durability, and an article and production method thereof having a surface layer that has excellent durability and that can maintain water and oil repellency, lubricity, and fingerprint stain removability for a long time. The fluorine-containing ether compound includes a polyfluoropolyether chain, a reactive silyl group, and a linking group that includes a group represented by *—O—C(?O)—**, in which the linking group links the polyfluoropolyether chain arranged on the * side and the reactive silyl group arranged on the ** side.

Abstract: To provide an article with a water and oil repellent layer, which is excellent in friction resistance. The article with a water and oil repellent layer of the present invention comprises a substrate, a water and oil repellent layer consisting of a hydrolyzed condensation product of a compound represented by the formula [A-(OX)m-]jY1[—Si(R)nL3-n]g, and a silicon oxide layer containing alkali metal atoms that exists between the substrate and the water and oil repellent layer, wherein the average value of the concentration of alkali metal atoms in a predetermined area in the silicon oxide layer is at least a predetermined value. In the formula, X is a fluoroalkylene group, m is at least 2, j, g, and k are at least 1, and Y1 and Y2 are linking groups, R is a monovalent hydrocarbon group, L is a hydrolyzable group or hydroxy group, n is 0 to 2, A is a perfluoroalkyl group or —Y2[—Si(R)nL3-n]n. When A is —Y2[—Si(R)nL3-n]k, j is 1, and when A is a perfluoroalkyl group and j is 1, g is at least 2.

Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid excellent in chemical resistance, an article having a surface layer excellent in chemical resistance and a method for producing it, and a method for producing a fluorinated ether compound excellent in chemical resistance. A fluorinated ether compound which has a first partial structure represented by the following formula (1) and a second partial structure represented by the following formula (2), and which has at least five first partial structures, or has at least two second partial structures: —ORf12—??(1) —ORf13—??(2) wherein Rf12 is a C1-6 fluoroalkylene group, and Rf13 is a group having a fluorinated cyclic structure which may have a hetero atom.

Abstract: To provide a composition with which a surface layer excellent in abrasion resistance and sliding resistance can be formed, and an article. The composition of the present invention comprises a compound represented by the formula (1) and a compound represented by the formula (2), wherein the ratio of the number of moles of the group represented by —CF3 in Rf1 in the formula (1) to the total of the number of moles of the group represented by —CF2— closest to Y1 in Rf2 in the formula (1), the number of moles of the group represented by —CF2— closest to Y2 in Rf3 in the formula (2) and the number of moles of the group represented by —CF2— closest to Y3 in Rf3 in the formula (2), is from 0.001 to 0.

Abstract: Processes for producing a fluorinated ether compound are provided by which fluorinated ether compound capable of imparting excellent water/oil repellency, to a substrate surface or a hard coat layer can be easily produced in high yield. A process comprising reacting Rf(CF2)a—CF2OC(?O)Rf4 or Rf(CF2)a—C(?O)X1 with HN(—R1CH?CH2)2 to obtain Rf(CF2)a—C(?O)N(—R1CH2?CH2)2 and a process comprising obtaining the above product and reacting the product with HSiR2nL3?n to obtain Rf(CF2)a—C(?O)N(—R1CH2CH2SiR2nL3?n)2 wherein Rf is a linear polyfluoroalkyl group having at least two carbon atoms and at least one etheric oxygen atom between carbon atoms, Rf4 is a C1-30 perfluoroalkyl group or the like, X1 is a halogen atom, R1 is an alkylene group, a is an integer of from 1 to 5, R2 is a monovalent hydrocarbon group, L is a hydrolyzable group, and n is an integer of from 0 to 2.

Abstract: Processes for producing a fluorinated ether compound are provided by which fluorinated ether compound capable of imparting excellent water/oil repellency, to a substrate surface or a hard coat layer can be easily produced in high yield. A process comprising reacting Rf(CF2)a—CF2OC(?O)Rf4 or Rf(CF2)a—C(?O)X1 with HN(—R1CH?CH2)2 to obtain Rf(CF2)a—C(?O)N(—R1CH2?CH2)2 and a process comprising obtaining the above product and reacting the product with HSiR2nL3-n to obtain Rf(CF2)a—C(?O)N(—R1CH2CH2SiR2nL3-n)2 wherein Rf is a linear polyfluoroalkyl group having at least two carbon atoms and at least one etheric oxygen atom between carbon atoms, Rf4 is a C1-30 perfluoroalkyl group or the like, X1 is a halogen atom, R1 is an alkylene group, a is an integer of from 1 to 5, R2 is a monovalent hydrocarbon group, L is a hydrolyzable group, and n is an integer of from 0 to 2.

Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid capable of forming a surface layer excellent in initial water/oil repellency, fingerprint stain removability, abrasion resistance, light resistance and chemical resistance, an article having a surface layer, and a method for producing it. A fluorinated ether compound represented by A-O—(Rf1O)m—Rf2—Z1-Q1 (R1)b, wherein A is a C1-20 perfluoroalkyl group, Rf1 is a linear fluoroalkylene group, m is an integer of from 2 to 500, Rf2 is a linear fluoroalkylene group, Z1 is a single bond, —(CR2R3)c— (wherein R2 and R3 are a hydrogen atom, a C1-6 monovalent organic group or the like, and c is an integer of from 1 to 10), a specific bond or a bivalent organic group having a specific bond, Q1 is a group having a (b+1) valent ring, R1 is a monovalent organic group having at least one hydrolyzable silyl group, and b is an integer of at least 2.

Abstract: Processes for producing a fluorinated ether compound are provided by which fluorinated ether compound capable of imparting excellent water/oil repellency, to a substrate surface or a hard coat layer can be easily produced in high yield. A process comprising reacting Rf(CF2)a—CF2OC(?O)Rf4 or Rf(CF2)a—C(?O)X1 with HN(—R1CH?CH2)2 to obtain Rf(CF2)a—C(?O)N(—R1CH2?CH2)2 and a process comprising obtaining the above product and reacting the product with HSiR2nL3-n to obtain Rf(CF2)a—C(?O)N(—R1CH2CH2SiR2nL3-n)2 wherein Rf is a linear polyfluoroalkyl group having at least two carbon atoms and at least one etheric oxygen atom between carbon atoms, Rf4 is a C1-30 perfluoroalkyl group or the like, X1 is a halogen atom, R1 is an alkylene group, a is an integer of from 1 to 5, R2 is a monovalent hydrocarbon group, L is a hydrolyzable group, and n is an integer of from 0 to 2.

Abstract: To provide a process for producing a desired perfluorinated product at a high yield in a fluorination reaction of a partially fluorinated ester. A perfluorinated compound (4) is obtained by fluorinating in a liquid phase a compound (3) (wherein the fluorine content is at least 30 mass %) obtained by reacting a compound (1) and a compound (2), wherein the compound (1) is HOCH2—RA—CH2OH, the compound (2) is X1C(?O)—C(RB)(RC)(RD), RA is a bivalent saturated hydrocarbon group or the like which has no hetero atom such as an etheric oxygen atom, X1 is a halogen atom, and —C(RB)(RC)(RD) is a branched group.

Abstract: To provide a process for producing a desired perfluorinated product at a high yield in a fluorination reaction of a partially fluorinated ester. A perfluorinated compound (4) is obtained by fluorinating in a liquid phase a compound (3) (wherein the fluorine content is at least 30 mass %) obtained by reacting a compound (1) and a compound (2), wherein the compound (1) is HOCH2—RA—CH2OH, the compound (2) is X1C(?O)—C(RB)(RC)(RD), RA is a bivalent saturated hydrocarbon group or the like which has no hetero atom such as an etheric oxygen atom, X1 is a halogen atom, and —C(RB)(RC)(RD) is a branched group.

Abstract: It is, therefore, an object of the present invention to provide a spray dampener which prevents the foreign matter such as ink mist from being introduced into the spray dampener and prevent the dampening water in the spray dampener from being leaked outside that. The spray dampener includes a pair of partitioned spaces. The partitioned spaces are formed along the edges. The spray dampener includes a plurality of air nozzles. The air nozzles are received in the partitioned spaces and spaced from each other longitudinally of the dampening water roller to spout compressed air toward the outer surface of the dampening water roller.

Abstract: An apparatus is arranged to feed dampening water in an offset printing press. The apparatus comprises a plurality of spray nozzles arranged in a row in a direction. Each of the nozzles includes an outlet formed therein for spraying the dampening water. The outlet has a cross section elongated in the direction in which the nozzles are arranged in the row, to spray the dampening water in an increasing fan-shaped area defined in the direction in which the nozzles are arranged in the row. The apparatus further comprises baffle means disposed at least on the opposite sides of each of the nozzles in the direction in which the nozzles are arranged in the row, to baffle air stream from being directed toward the nozzle when spraying and stopping the dampening water.