Surface preparation agent

Abstract

To provide a surface preparation agent containing a fluoro(poly)ether group-containing silane compound, capable of forming a layer having high friction durability.SOLUTION: A surface preparation agent contains at least one kind of fluoropolyether group-containing compound expressed by following formula (1) or (2) [in the formula, each symbol has the same meaning as the description in the specification], and chloride ion. In the surface preparation agent, a chloride ion concentration in the surface preparation agent is 0.1 mass ppm or more and 1.0 mass ppm or less.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present disclosure relates to a surface treatment agent. [Background technology]

[0002] It is known that certain fluorine-containing silane compounds, when used in the surface treatment of a substrate, can provide excellent water repellency, oil repellency, antifouling properties, etc. A layer obtained from a surface treatment agent containing a fluorine-containing silane compound (hereinafter also referred to as a "surface treatment layer") is applied as a so-called functional thin film to a wide variety of substrates, such as glass, plastics, fibers, and building materials.

[0003] Known examples of such fluorine-containing compounds include perfluoropolyether group-containing silane compounds that have a perfluoropolyether group in the molecular main chain and a hydrolyzable group bonded to a Si atom at the molecular end or terminal portion (Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-218639 A [Patent Document 2] JP 2017-082194 A Summary of the Invention [Problem to be solved by the invention]

[0005] Since a layer obtained from a surface treatment agent containing a perfluoropolyether group-containing silane compound can exhibit functions such as water repellency, oil repellency, and stain resistance even in a thin film, it is preferably used for optical components such as glasses and touch panels that require light transmission and transparency. In particular, in these applications, friction durability is required so that such functions can be maintained even when repeatedly subjected to friction.

[0006] An object of the present disclosure is to provide a surface treatment agent comprising a fluoro(poly)ether group-containing silane compound capable of forming a layer having high abrasion resistance. [Means for solving the problem]

[0007] The present disclosure includes the following aspects. [1] The following formula (1) or (2): [ka] [In formula: R F1 each occurrence independently represents Rf 1 -R F -O q - and; R F2 is -Rf 2 p -R F -O q - and; Rf 1 C, which may be substituted by one or more fluorine atoms, independently at each occurrence; 1-16 is an alkyl group; Rf 2 C may be substituted by one or more fluorine atoms. 1-6 is an alkylene group; R F is independently at each occurrence a divalent fluoropolyether group; p is 0 or 1; q, independently at each occurrence, is 0 or 1; R Si is independently in each occurrence a monovalent group containing a silicon atom to which is bonded a hydroxyl group, a hydrolyzable group, a hydrogen atom, or a monovalent organic group; At least one R Si is a monovalent group containing a silicon atom having a hydroxyl group or a hydrolyzable group bonded thereto; X A each independently represents a single bond or a divalent to decavalent organic group; α is an integer from 1 to 9; β is an integer from 1 to 9; Each γ is independently an integer from 1 to 9. and chloride ions, wherein the chloride ion concentration in the surface treatment agent is 0.1 ppm by mass or more and 1.0 ppm by mass or less. [2] Rf 1 may each independently in each occurrence be 1-16 The surface treatment agent according to the above-mentioned [1], which is a perfluoroalkyl group. [3] Rf 2 may each independently in each occurrence be 1-6 The surface treatment agent according to the above [1] or [2], which is a perfluoroalkylene group. [4] R F may independently at each occurrence represent the formula: -(OC6F 12 ) a -(OC5F 10 ) b -(OC4F8) c -(OC3R Fa 6) d -(OC2F4) e -(OCF2) f - [In the formula, R Fa is independently at each occurrence a hydrogen atom, a fluorine atom, or a chlorine atom; a, b, c, d, e, and f each independently represent an integer of 0 to 200, the sum of a, b, c, d, e, and f is 1 or more, and the order of the repeating units enclosed in parentheses with a, b, c, d, e, or f is arbitrary in the formula. The surface treatment agent according to any one of the above [1] to [3], wherein the group is represented by the following formula: [5] R Fa is a fluorine atom. [6] R F represents, independently at each occurrence, the following formula (f1), (f2), (f3), (f4) or (f5): -(OC3F6) d - (f1) [In the formula, d is an integer of 1 to 200.] -(OC4F8) c -(OC3F6) d -(OC2F4) e -(OCF2) f - (f2) [In the formula, c and d each independently represent an integer of 0 to 30; e and f are each independently an integer of 1 to 200; The sum of c, d, e and f is an integer from 10 to 200; The order of occurrence of each repeat unit enclosed in parentheses with the subscript c, d, e, or f is arbitrary in the formula. -(R 6 -R 7 ) g - (f3) [In the formula, R 6 is OCF2 or OC2F4; R 7 are OC2F4, OC3F6, OC4F8, OC5F 10 and OC6F 12 or a combination of two or three groups selected from these groups; g is an integer from 2 to 100. -(OC6F 12 ) a -(OC5F 10 ) b -(OC4F8) c -(OC3F6) d -(OC2F4) e -(OCF2) f - (f4) [In the formula, e is an integer of 1 or more and 200 or less, a, b, c, d, and f are each independently an integer of 0 or more and 200 or less, the sum of a, b, c, d, e, and f is at least 1, and the order of the repeating units enclosed in parentheses with a, b, c, d, e, or f is arbitrary in the formula.] -(OC6F 12 ) a -(OC5F10 ) b -(OC4F8) c -(OC3F6) d -(OC2F4) e -(OCF2) f - (f5) [In the formula, f is an integer of 1 or more and 200 or less, a, b, c, d, and e are each independently an integer of 0 or more and 200 or less, the sum of a, b, c, d, e, and f is at least 1, and the order of the repeating units enclosed in parentheses with a, b, c, d, e, or f is arbitrary in the formula.] The surface treatment agent according to any one of the above [1] to [5], wherein the group is represented by the following formula: [7] R Si is expressed by the following formula (S1), (S2), (S3), or (S4): [ka] [In formula: R 11 is independently at each occurrence a hydroxyl group or a hydrolyzable group; R 12 is independently at each occurrence a hydrogen atom or a monovalent organic group; n1 is (SiR 11 n1 R 12 3-n1 ) each unit independently represents an integer from 0 to 3; X 11 is independently at each occurrence a single bond or a divalent organic group; R 13 is independently at each occurrence a hydrogen atom or a monovalent organic group; t is independently in each occurrence an integer from 2 to 10; R 14 is independently at each occurrence a hydrogen atom or a halogen atom; R a1 may each independently in each occurrence be -Z 1 -SiR 21 p1 R 22q1 R 23 r1 and; Z 1 is independently at each occurrence an oxygen atom or a divalent organic group; R 21 may each independently in each occurrence be -Z 1’ -SiR 21’ p1’ R 22’ q1’ R 23’ r1’ and; R 22 is independently at each occurrence a hydroxyl group or a hydrolyzable group; R 23 is independently at each occurrence a hydrogen atom or a monovalent organic group; p1, at each occurrence, is independently an integer from 0 to 3; q1, in each occurrence, is independently an integer from 0 to 3; r1, independently at each occurrence, is an integer from 0 to 3; Z 1’ is independently at each occurrence an oxygen atom or a divalent organic group; R 21’ may each independently in each occurrence be -Z 1” -SiR 22” q1” R 23” r1” and; R 22’ is independently at each occurrence a hydroxyl group or a hydrolyzable group; R 23’ is independently at each occurrence a hydrogen atom or a monovalent organic group; p1' in each occurrence is independently an integer from 0 to 3; q1' in each occurrence is independently an integer from 0 to 3; r1' in each occurrence is independently an integer from 0 to 3; Z 1”is independently at each occurrence an oxygen atom or a divalent organic group; R 22” is independently at each occurrence a hydroxyl group or a hydrolyzable group; R 23” is independently at each occurrence a hydrogen atom or a monovalent organic group; q1″ in each occurrence is independently an integer from 0 to 3; r1″ in each occurrence is independently an integer from 0 to 3; R b1 is independently at each occurrence a hydroxyl group or a hydrolyzable group; R c1 is independently at each occurrence a hydrogen atom or a monovalent organic group; k1, at each occurrence, is independently an integer from 0 to 3; l1, at each occurrence, is independently an integer from 0 to 3; m1, at each occurrence, is independently an integer from 0 to 3; R d1 may each independently in each occurrence be -Z 2 -CR 31 p2 R 32 q2 R 33 r2 and; Z 2 is independently at each occurrence a single bond, an oxygen atom, or a divalent organic group; R 31 may each independently in each occurrence be -Z 2’ -CR 32’ q2’ R 33’ r2’ and; R 32 may each independently in each occurrence be -Z 3 -SiR 34 n2 R 35 3-n2 and; R 33is independently in each occurrence a hydrogen atom, a hydroxyl group, or a monovalent organic group; p2, in each occurrence, is independently an integer from 0 to 3; q2, in each occurrence, is independently an integer from 0 to 3; r2, independently at each occurrence, is an integer from 0 to 3; Z 2’ is independently at each occurrence a single bond, an oxygen atom, or a divalent organic group; R 32’ may each independently in each occurrence be -Z 3 -SiR 34 n2 R 35 3-n2 and; R 33’ is independently in each occurrence a hydrogen atom, a hydroxyl group, or a monovalent organic group; q2' is independently in each occurrence an integer from 0 to 3; r2' is independently at each occurrence an integer from 0 to 3; Z 3 is independently at each occurrence a single bond, an oxygen atom, or a divalent organic group; R 34 is independently at each occurrence a hydroxyl group or a hydrolyzable group; R 35 is independently at each occurrence a hydrogen atom or a monovalent organic group; n2, in each occurrence, is independently an integer from 0 to 3; R e1 may each independently in each occurrence be -Z 3 -SiR 34 n2 R 35 3-n2 and; R f1 is independently in each occurrence a hydrogen atom, a hydroxyl group, or a monovalent organic group; k2, in each occurrence, is independently an integer from 0 to 3; l2, in each occurrence, is independently an integer from 0 to 3; m2 in each occurrence is independently an integer from 0 to 3. The surface treatment agent according to any one of the above [1] to [6], wherein the group is represented by the following formula: [8] The surface treatment agent according to any one of the above [1] to [7], wherein α, β, and γ are 1. [9] X A are each independently a trivalent organic group, α is 1 and β is 2, or α is 2 and β is 1, γ is 2, The surface treatment agent according to any one of the above [1] to [7].

[10] The surface treatment agent according to any one of the above [1] to [9], wherein the surface treatment agent has a chloride ion concentration of 0.2 to 0.8 ppm by mass.

[11] The surface treatment agent according to any one of the above [1] to

[10] , further comprising one or more other components selected from the group consisting of fluorine-containing oils, silicone oils, and catalysts.

[12] The surface treatment agent according to any one of the above [1] to

[11] , further comprising a solvent.

[13] The surface treatment agent according to any one of the above [1] to

[12] , which is used as an antifouling coating agent or a waterproof coating agent.

[14] The surface treatment agent according to any one of the above [1] to

[13] , which is for vacuum deposition.

[15] A pellet containing the surface treatment agent according to any one of the above items [1] to

[14] .

[16] An article comprising a substrate and a layer formed on the surface of the substrate from the surface treatment agent according to any one of the above [1] to

[14] .

[17] The article according to

[16] above, which is an optical component. Effect of the Invention

[0008] The surface treatment agent of the present disclosure can form a surface treatment layer having excellent friction durability by adjusting the chloride ion concentration to the range of 0.1 ppm by mass or more and 1.0 ppm by mass or less. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] As used herein, the term "monovalent organic group" refers to a monovalent group containing carbon. The monovalent organic group may be, but is not limited to, a hydrocarbon group or a derivative thereof. The derivative of a hydrocarbon group refers to a group having one or more N, O, S, Si, amide, sulfonyl, siloxane, carbonyl, carbonyloxy, etc. at the end or in the molecular chain of the hydrocarbon group. In addition, when simply referring to an "organic group", it refers to a monovalent organic group. In addition, the term "divalent to decavalent organic group" refers to a divalent to decavalent group containing carbon. The divalent to decavalent organic group may be, but is not limited to, a divalent to decavalent group obtained by further removing 1 to 9 hydrogen atoms from an organic group. For example, the divalent organic group may be, but is not limited to, a divalent group obtained by further removing one hydrogen atom from an organic group.

[0010] As used herein, the term "hydrocarbon group" refers to a group containing carbon and hydrogen, which is a hydrocarbon group from which one hydrogen atom has been removed. Such a hydrocarbon group includes, but is not limited to, C 1-20 Examples of the hydrocarbon group include an aliphatic hydrocarbon group and an aromatic hydrocarbon group. The "aliphatic hydrocarbon group" may be linear, branched, or cyclic, and may be saturated or unsaturated. The hydrocarbon group may contain one or more ring structures.

[0011] As used herein, examples of the substituent of the "hydrocarbon group" include, but are not limited to, a halogen atom, a C 1-6 Alkyl group, C 2-6 Alkenyl group, C 2-6 Alkynyl group, C 3-10 Cycloalkyl groups, C 3-10Unsaturated cycloalkyl groups, 5-10 membered heterocyclyl groups, 5-10 membered unsaturated heterocyclyl groups, C 6-10 Examples of the alkyl group include one or more groups selected from an aryl group and a 5- to 10-membered heteroaryl group.

[0012] As used herein, the term "hydrolyzable group" refers to a group that can undergo hydrolysis, i.e., a group that can be removed from the main skeleton of a compound by hydrolysis. Examples of hydrolyzable groups include -OR h , -OCOR h , -ON=CR h 2, -NR h 2, -NHR h , halogen (wherein R h is a substituted or unsubstituted C 1-4 (representing an alkyl group) and the like.

[0013] The surface treatment agent of the present disclosure is represented by the following formula (1) or (2): [ka] The surface treatment agent contains at least one fluoropolyether group-containing compound represented by the following formula:

[0014] In the above formula (1), R F1 each occurrence independently represents Rf 1 -R F -O q -It is.

[0015] In the above formula (2), R F2 is -Rf 2 p -R F -O q -It is.

[0016] In the above formula, Rf 1 C, which may be substituted by one or more fluorine atoms, independently at each occurrence; 1-16It is an alkyl group.

[0017] C which may be substituted by one or more fluorine atoms 1-16 "C" in alkyl group 1-16 The "alkyl group" may be a straight or branched chain, and is preferably a straight or branched C 1-6 Alkyl groups, especially C 1-3 is preferably a straight-chain C 1-6 Alkyl groups, especially C 1-3 It is an alkyl group.

[0018] Above Rf 1 is preferably C substituted by one or more fluorine atoms 1-16 is an alkyl group, more preferably CF2H-C 1-15 A perfluoroalkylene group, more preferably C 1-16 It is a perfluoroalkyl group.

[0019] Above C 1-16 The perfluoroalkyl group may be linear or branched, and is preferably a linear or branched C 1-6 Perfluoroalkyl groups, especially C 1-3 A perfluoroalkyl group, more preferably a linear C 1-6 Perfluoroalkyl groups, especially C 1-3 A perfluoroalkyl group, specifically, -CF3, -CF2CF3, or -CF2CF2CF3.

[0020] In the above formula, Rf 2 C may be substituted by one or more fluorine atoms. 1-6 It is an alkylene group.

[0021] C which may be substituted by one or more fluorine atoms 1-6 "C" in the alkylene group 1-6 The "alkylene group" may be a straight chain or a branched chain, and is preferably a straight chain or branched C 1-3It is preferably a linear alkylene group. 1-3 It is an alkylene group.

[0022] Above Rf 2 is preferably C substituted by one or more fluorine atoms 1-6 is an alkylene group, more preferably C 1-6 A perfluoroalkylene group, more preferably C 1-3 It is a perfluoroalkylene group.

[0023] Above C 1-6 The perfluoroalkylene group may be linear or branched, and is preferably a linear or branched C 1-3 A perfluoroalkylene group, more preferably a linear C 1-3 A perfluoroalkyl group, specifically, -CF2-, -CF2CF2-, or -CF2CF2CF2-.

[0024] In the above formula, p is 0 or 1. In one embodiment, p is 0. In another embodiment, p is 1.

[0025] In the above formula, q is, independently at each occurrence, 0 or 1. In one embodiment, q is 0. In another embodiment, q is 1.

[0026] In the above formulas (1) and (2), R F is independently at each occurrence a divalent fluoropolyether group.

[0027] R F is preferably of the formula: -(OC6F 12 ) a -(OC5F 10 ) b -(OC4F8) c -(OC3R Fa 6) d -(OC2F4) e -(OCF2) f - [In formula: R Fa is independently at each occurrence a hydrogen atom, a fluorine atom, or a chlorine atom; a, b, c, d, e and f each independently represent an integer of 0 to 200, and the sum of a, b, c, d, e and f is 1 or more. The order of the repeating units enclosed in parentheses with a, b, c, d, e or f is arbitrary in the formula.] It is a group represented by the following formula:

[0028] R Fa is preferably a hydrogen atom or a fluorine atom, and more preferably a fluorine atom.

[0029] a, b, c, d, e and f may preferably each independently be an integer of 0 to 100.

[0030] The sum of a, b, c, d, e and f is preferably 5 or more, more preferably 10 or more, and may be, for example, 15 or more or 20 or more. The sum of a, b, c, d, e and f is preferably 200 or less, more preferably 100 or less, and even more preferably 60 or less, and may be, for example, 50 or less or 30 or less.

[0031] These repeating units may be linear or branched. For example, the repeating unit may be -(OCF 12 )- may be -(OCF2CF2CF2CF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2CF2CF2)-, -(OCF2CF(CF3)CF2CF2CF2)-, -(OCF2CF2CF(CF3)CF2CF2)-, -(OCF2CF2CF2CF(CF3)CF2)-, -(OCF2CF2CF2CF2CF(CF3)CF2)-, -(OCF2CF2CF2CF2CF(CF3))-, etc. 10)- may be -(OCF2CF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2CF2)-, -(OCF2CF(CF3)CF2CF2)-, -(OCF2CF2CF(CF3)CF2)-, -(OCF2CF2CF2CF(CF3))-, etc. -(OC4F8)- may be -(OCF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2)-, -(OCF2CF(CF3)CF2)-, -(OCF2CF2CF(CF3))-, -(OC(CF3)2CF2)-, -(OCF2C(CF3)2)-, -(OCF(CF3)CF(CF3))-, -(OCF(C2F5)CF2)-, and -(OCF2CF(C2F5))-. -(OC3F6)- (i.e., in the above formula, R Fa is a fluorine atom) may be any of -(OCF2CF2CF2)-, -(OCF(CF3)CF2)-, and -(OCF2CF(CF3))-. -(OC2F4)- may be any of -(OCF2CF2)- and -(OCF(CF3))-.

[0032] In one embodiment, the repeating unit is linear. By making the repeating unit linear, the surface slip property, friction durability, etc. of the surface treatment layer can be improved.

[0033] In one embodiment, the repeating unit is a branched chain. By making the repeating unit a branched chain, the dynamic friction coefficient of the surface treatment layer can be increased.

[0034] In one embodiment, R F represents, independently at each occurrence, the following formulas (f1) to (f5): -(OC3F6) d - (f1) [In the formula, d is an integer of 1 to 200.]; -(OC4F8) c -(OC3F6) d -(OC2F4) e -(OCF2) f - (f2) [In the formula, c and d each independently represent an integer of 0 or more and 30 or less, and e and f each independently represent an integer of 1 or more and 200 or less, The sum of c, d, e, and f is 2 or more, The order of occurrence of each repeat unit enclosed in parentheses with the subscript c, d, e, or f is arbitrary in the formula.]; -(R 6 -R 7 ) g - (f3) [In the formula, R 6 is OCF2 or OC2F4, R 7 are OC2F4, OC3F6, OC4F8, OC5F 10 and OC6F 12 or a combination of two or three groups independently selected from these groups; g is an integer from 2 to 100; or -(OC6F 12 ) a -(OC5F 10 ) b -(OC4F8) c -(OC3F6) d -(OC2F4) e -(OCF2) f - (f4) [In the formula, e is an integer of 1 or more and 200 or less, a, b, c, d, and f are each independently an integer of 0 or more and 200 or less, the sum of a, b, c, d, e, and f is at least 1, and the order of the repeating units enclosed in parentheses with a, b, c, d, e, or f is arbitrary in the formula.] -(OC6F 12 ) a -(OC5F 10 ) b -(OC4F8) c -(OC3F6) d -(OC2F4) e -(OCF2) f - (f5) [In the formula, f is an integer of 1 or more and 200 or less, a, b, c, d, and e are each independently an integer of 0 or more and 200 or less, the sum of a, b, c, d, e, and f is at least 1, and the order of the repeating units enclosed in parentheses with a, b, c, d, e, or f is arbitrary in the formula.] It is a group represented by the following formula:

[0035] In the above formula (f1), d is preferably an integer of 5 to 200, more preferably 10 to 100, and further preferably 15 to 50, for example, an integer of 25 to 35. The above formula (f1) is preferably -(OCF2CF2CF2) d -or-(OCF(CF3)CF2) d -, more preferably -(OCF2CF2CF2) d - is a group represented by the formula:

[0036] In the above formula (f2), e and f are each independently an integer of preferably 5 or more and 200 or less, more preferably 10 to 200. The sum of c, d, e and f is preferably 5 or more, more preferably 10 or more, and may be, for example, 15 or more or 20 or more. In one embodiment, the above formula (f2) is preferably -(OCF2CF2CF2CF2) c -(OCF2CF2CF2) d -(OCF2CF2) e -(OCF2) f In another embodiment, formula (f2) is a group represented by -(OC2F4) e -(OCF2) f - may be a group represented by the formula:

[0037] In the above formula (f3), R 6 is preferably OC2F4. In the above (f3), R 7is preferably a group selected from OC2F4, OC3F6 and OC4F8, or a combination of two or three groups independently selected from these groups, more preferably a group selected from OC3F6 and OC4F8. The combination of two or three groups independently selected from OC2F4, OC3F6 and OC4F8 is not particularly limited, and examples thereof include -OC2F4OC3F6-, -OC2F4OC4F8-, -OC3F6OC2F4-, -OC3F6OC3F6-, -OC3F6OC4F8-, -OC4F8OC4F8-, -OC4F8OC3F6-, -OC4F8OC2F4-, -OC Examples of the 2F4OC2F4OC3F6-, -OC2F4OC2F4OC4F8-, -OC2F4OC3F6OC2F4-, -OC2F4OC3F6OC3F6-, -OC2F4OC4F8OC2F4-, -OC3F6OC2F4OC2F4-, -OC3F6OC2F4OC3F6-, -OC3F6OC3F6OC2F4-, and -OC4F8OC2F4OC2F4- are mentioned. In the above formula (f3), g is preferably an integer of 3 or more, more preferably an integer of 5 or more. The above g is preferably an integer of 50 or less. In the above formula (f3), OC2F4, OC3F6, OC4F8, OC5F 10 and OC6F 12 may be either linear or branched, and is preferably linear. In this embodiment, the above formula (f3) is preferably -(OC2F4-OC3F6) g -or- (OC2F4-OC4F8) g -It is.

[0038] In the above formula (f4), e is preferably an integer of 1 or more and 100 or less, more preferably an integer of 5 or more and 100 or less. The sum of a, b, c, d, e and f is preferably 5 or more, more preferably 10 or more, for example, 10 or more and 100 or less.

[0039] In the above formula (f5), f is preferably an integer of 1 or more and 100 or less, more preferably an integer of 5 or more and 100 or less. The sum of a, b, c, d, e and f is preferably 5 or more, more preferably 10 or more, for example, 10 or more and 100 or less.

[0040] In one embodiment, the R F is a group represented by the above formula (f1).

[0041] In one embodiment, the R F is a group represented by the above formula (f2).

[0042] In one embodiment, the R F is a group represented by the above formula (f3).

[0043] In one embodiment, the R F is a group represented by the above formula (f4).

[0044] In one embodiment, the R F is a group represented by the above formula (f5).

[0045] Above R F In the formula, the ratio of e to f (hereinafter referred to as "e / f ratio") is 0.1 to 10, preferably 0.2 to 5, more preferably 0.2 to 2, even more preferably 0.2 to 1.5, and even more preferably 0.2 to 0.85. By making the e / f ratio 10 or less, the slipperiness, friction durability, and chemical resistance (e.g., durability against artificial sweat) of the surface treatment layer obtained from this compound are further improved. The smaller the e / f ratio, the more improved the slipperiness and friction durability of the surface treatment layer. On the other hand, by making the e / f ratio 0.1 or more, the stability of the compound can be further improved. The larger the e / f ratio, the more improved the stability of the compound.

[0046] In one embodiment, the e / f ratio is preferably 0.2 to 0.95, and more preferably 0.2 to 0.9.

[0047] In one embodiment, from the viewpoint of heat resistance, the e / f ratio is preferably 1.0 or more, and more preferably 1.0 to 2.0.

[0048] In the above fluoropolyether group-containing compound, R F1 and R F2 The number average molecular weight of the portion is not particularly limited, but is, for example, 500 to 30,000, preferably 1,500 to 30,000, and more preferably 2,000 to 10,000. F1 and R F2 The number average molecular weight of 19 The value is measured by F-NMR.

[0049] In another embodiment, R F1 and R F2 The number average molecular weight of the portion may be from 500 to 30,000, preferably from 1,000 to 20,000, more preferably from 2,000 to 15,000, even more preferably from 2,000 to 10,000, for example from 3,000 to 6,000.

[0050] In another embodiment, R F1 and R F2 The number average molecular weight of the portion may be from 4,000 to 30,000, preferably from 5,000 to 10,000, and more preferably from 6,000 to 10,000.

[0051] In the above formulas (1) and (2), R Si is independently in each occurrence a hydroxyl group, a hydrolyzable group, a hydrogen atom, or a monovalent group containing a silicon atom to which a monovalent organic group is bonded, and at least one R Si is a monovalent group containing a silicon atom having a hydroxyl group or a hydrolyzable group bonded thereto.

[0052] In a preferred embodiment, R Si is a monovalent group containing a silicon atom having a hydroxyl group or a hydrolyzable group bonded thereto.

[0053] In a preferred embodiment, R Si is expressed by the following formula (S1), (S2), (S3), or (S4): [ka] It is a group represented by the following formula:

[0054] In the above formula, R 11 is independently at each occurrence a hydroxyl group or a hydrolyzable group.

[0055] R 11 is preferably, independently at each occurrence, a hydrolyzable group.

[0056] R 11 is preferably, independently at each occurrence, -OR h , -OCOR h , -ON=CR h 2, -NR h 2, -NHR h or halogen (wherein R h is a substituted or unsubstituted C 1-4 alkyl group), more preferably -OR h (i.e., an alkoxy group). h Examples of R include unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl; and substituted alkyl groups such as chloromethyl. Among them, alkyl groups, particularly unsubstituted alkyl groups, are preferred, and methyl or ethyl groups are more preferred. In one embodiment, R h is a methyl group, and in another embodiment, R h is an ethyl group.

[0057] In the above formula, R 12 is independently at each occurrence a hydrogen atom or a monovalent organic group. Such monovalent organic groups are monovalent organic groups other than the hydrolyzable groups described above.

[0058] R 12 In the above, the monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is preferably an alkyl group, more preferably a methyl group.

[0059] In the above formula, n1 is (SiR11 n1 R 12 3-n1 ) units are each independently an integer of 0 to 3. Si is a group represented by formula (S1) or (S2), R at the terminal of formula (1) and formula (2) Si In the portion (hereinafter also simply referred to as the “terminal portion” of formula (1) and formula (2)), n1 is 1 to 3 (SiR 11 n1 R 12 3-n1 ) unit is present. That is, in such a terminal portion, all n1s are not simultaneously 0. In other words, in the terminal portion of formula (1) and formula (2), there is at least one Si atom to which a hydroxyl group or a hydrolyzable group is bonded.

[0060] n1 is (SiR 11 n1 R 12 3-n1 ) units are each independently preferably an integer of 1 to 3, more preferably 2 or 3, and even more preferably 3.

[0061] In the above formula, X 11 is independently at each occurrence a single bond or a divalent organic group. Such a divalent organic group is preferably 1-20 It is an alkylene group. 1-20 The alkylene group may be straight-chained or branched, but is preferably straight-chained.

[0062] In a preferred embodiment, X 11 each occurrence independently represents a single bond or a straight-chain C 1-6 An alkylene group, preferably a single bond or a straight chain C 1-3 An alkylene group, more preferably a single bond or a straight chain C 1-2 It is preferably a linear C 1-2 It is an alkylene group.

[0063] In the above formula, R 13is independently at each occurrence a hydrogen atom or a monovalent organic group. Such monovalent organic groups are preferably 1-20 It is an alkyl group. 1-20 The alkyl group may be straight or branched chain, but is preferably straight chain.

[0064] In a preferred embodiment, R 13 each occurrence independently represents a hydrogen atom or a straight-chain C 1-6 is an alkyl group, preferably a hydrogen atom or a straight-chain C 1-3 An alkyl group is preferably a hydrogen atom or a methyl group.

[0065] In the above formula, t is independently an integer from 2 to 10 in each occurrence.

[0066] In a preferred embodiment, t is independently at each occurrence an integer from 2 to 6.

[0067] In the above formula, R 14 is independently at each occurrence a hydrogen atom or a halogen atom. Such a halogen atom is preferably an iodine atom, a chlorine atom or a fluorine atom, more preferably a fluorine atom. In a preferred embodiment, R 14 is a hydrogen atom.

[0068] In the above formula, R a1 may each independently in each occurrence be -Z 1 -SiR 21 p1 R 22 q1 R 23 r1 It is.

[0069] Above Z 1 is independently an oxygen atom or a divalent organic group in each occurrence. 1 The structure written as is shown on the right side (SiR 21 p1 R 22 q1 R23 r1 )

[0070] In a preferred embodiment, Z 1 is a divalent organic group.

[0071] In a preferred embodiment, Z 1 is Z 1 That is, in the formula (S3), (Si-Z) does not include a compound that forms a siloxane bond with the Si atom to which it is bonded. 1 --Si) does not contain a siloxane bond.

[0072] Above Z 1 is preferably C 1-6 Alkylene group, -(CH2) z1 -O-(CH2) z2 - (wherein z1 is an integer of 0 to 6, for example, an integer of 1 to 6, and z2 is an integer of 0 to 6, for example, an integer of 1 to 6), or -(CH2) z3 -Phenylene-(CH2) z4 - (wherein z3 is an integer of 0 to 6, for example, an integer of 1 to 6, and z4 is an integer of 0 to 6, for example, an integer of 1 to 6). 1-6 The alkylene groups may be linear or branched, but are preferably linear. These groups may contain, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 It may be substituted by one or more substituents selected from alkynyl groups, but is preferably unsubstituted.

[0073] In a preferred embodiment, Z 1 is C 1-6 Alkylene group or -(CH2) z3 -Phenylene-(CH2) z4 -, preferably -phenylene-(CH2) z4 -It is. 1 is such a group, light resistance, particularly ultraviolet resistance, can be improved.

[0074] In another preferred embodiment, the Z 1 is C 1-3 In one embodiment, Z is an alkylene group. 1 can be -CH2CH2CH2-. In another embodiment, Z 1 can be -CH2CH2-.

[0075] Above R 21 may each independently in each occurrence be -Z 1’ -SiR 21’ p1’ R 22’ q1’ R 23’ r1’ It is.

[0076] Above Z 1’ is independently an oxygen atom or a divalent organic group in each occurrence. 1’ The structure written as is shown on the right side (SiR 21’ p1’ R 22’ q1’ R 23’ r1’ )

[0077] In a preferred embodiment, Z 1’ is a divalent organic group.

[0078] In a preferred embodiment, Z 1’ is Z 1’ That is, in the formula (S3), (Si-Z) does not include a compound that forms a siloxane bond with the Si atom to which it is bonded. 1’ --Si) does not contain a siloxane bond.

[0079] Above Z 1’ is preferably C 1-6 Alkylene group, -(CH2) z1’ -O-(CH2) z2’ - (wherein z1' is an integer of 0 to 6, for example, an integer of 1 to 6, and z2' is an integer of 0 to 6, for example, an integer of 1 to 6), or -(CH2) z3’ -Phenylene-(CH2) z4’- (wherein z3' is an integer of 0 to 6, for example, an integer of 1 to 6, and z4' is an integer of 0 to 6, for example, an integer of 1 to 6). 1-6 The alkylene groups may be linear or branched, but are preferably linear. These groups may contain, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 It may be substituted by one or more substituents selected from alkynyl groups, but is preferably unsubstituted.

[0080] In a preferred embodiment, Z 1’ is C 1-6 Alkylene group or -(CH2) z3’ -Phenylene-(CH2) z4’ -, preferably -phenylene-(CH2) z4’ -It is. 1’ is such a group, light resistance, particularly ultraviolet resistance, can be improved.

[0081] In another preferred embodiment, the Z 1’ is C 1-3 In one embodiment, Z is an alkylene group. 1’ can be -CH2CH2CH2-. In another embodiment, Z 1’ can be -CH2CH2-.

[0082] Above R 21’ may each independently in each occurrence be -Z 1” -SiR 22” q1” R 23” r1” It is.

[0083] Above Z 1” is independently an oxygen atom or a divalent organic group in each occurrence. 1” The structure written as is shown on the right side (SiR 22” q1” R 23” r1” )

[0084] In a preferred embodiment, Z 1” is a divalent organic group.

[0085] In a preferred embodiment, Z 1” is Z 1” That is, in the formula (S3), (Si-Z) does not include a compound that forms a siloxane bond with the Si atom to which it is bonded. 1” --Si) does not contain a siloxane bond.

[0086] Above Z 1” is preferably C 1-6 Alkylene group, -(CH2) z1” -O-(CH2) z2” - (wherein z1" is an integer of 0 to 6, for example, an integer of 1 to 6, and z2" is an integer of 0 to 6, for example, an integer of 1 to 6), or -(CH2) z3” -Phenylene-(CH2) z4” - (wherein z3" is an integer of 0 to 6, for example, an integer of 1 to 6, and z4" is an integer of 0 to 6, for example, an integer of 1 to 6). 1-6 The alkylene groups may be linear or branched, but are preferably linear. These groups may contain, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 It may be substituted by one or more substituents selected from alkynyl groups, but is preferably unsubstituted.

[0087] In a preferred embodiment, Z 1” is C 1-6 Alkylene group or -(CH2) z3” -Phenylene-(CH2) z4” -, preferably -phenylene-(CH2) z4” -It is. 1” is such a group, light resistance, particularly ultraviolet resistance, can be improved.

[0088] In another preferred embodiment, the Z 1” is C 1-3 In one embodiment, Z is an alkylene group.1” can be -CH2CH2CH2-. In another embodiment, Z 1” can be -CH2CH2-.

[0089] Above R 22” is independently at each occurrence a hydroxyl group or a hydrolyzable group.

[0090] Above R 22” is preferably, independently at each occurrence, a hydrolyzable group.

[0091] Above R 22” is preferably, independently at each occurrence, -OR h , -OCOR h , -ON=CR h 2, -NR h 2, -NHR h or halogen (wherein R h is a substituted or unsubstituted C 1-4 alkyl group), more preferably -OR h (i.e., an alkoxy group). h Examples of R include unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl; and substituted alkyl groups such as chloromethyl. Among them, alkyl groups, particularly unsubstituted alkyl groups, are preferred, and methyl or ethyl groups are more preferred. In one embodiment, R h is a methyl group, and in another embodiment, R h is an ethyl group.

[0092] Above R 23” is independently at each occurrence a hydrogen atom or a monovalent organic group. Such monovalent organic groups are monovalent organic groups other than the hydrolyzable groups described above.

[0093] Above R 23” In the above, the monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is preferably an alkyl group, more preferably a methyl group.

[0094] The above q1″ is independently an integer of 0 to 3 in each occurrence, and the above r1″ is independently an integer of 0 to 3 in each occurrence. The sum of q1″ and r1″ is (SiR 22” q1” R 23” r1” ) units, it is 3.

[0095] The above q1" is (SiR 22” q1” R 23” r1” ) units are each independently preferably an integer of 1 to 3, more preferably 2 or 3, and even more preferably 3.

[0096] Above R 22’ is independently at each occurrence a hydroxyl group or a hydrolyzable group.

[0097] R 22’ is preferably, independently at each occurrence, a hydrolyzable group.

[0098] R 22’ is preferably, independently at each occurrence, -OR h , -OCOR h , -ON=CR h 2, -NR h 2, -NHR h or halogen (wherein R h is a substituted or unsubstituted C 1-4 alkyl group), more preferably -OR h (i.e., an alkoxy group). h Examples of R include unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl; and substituted alkyl groups such as chloromethyl. Among them, alkyl groups, particularly unsubstituted alkyl groups, are preferred, and methyl or ethyl groups are more preferred. In one embodiment, R h is a methyl group, and in another embodiment, R his an ethyl group.

[0099] Above R 23’ is independently at each occurrence a hydrogen atom or a monovalent organic group. Such monovalent organic groups are monovalent organic groups other than the hydrolyzable groups described above.

[0100] R 23’ In the above, the monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is preferably an alkyl group, more preferably a methyl group.

[0101] The above p1' is independently an integer of 0 to 3 in each occurrence, q1' is independently an integer of 0 to 3 in each occurrence, and r1' is independently an integer of 0 to 3 in each occurrence. The sum of p', q1' and r1' is (SiR 21’ p1’ R 22’ q1’ R 23’ r1’ ) units, it is 3.

[0102] In one embodiment, p1' is 0.

[0103] In one embodiment, p1' is (SiR 21’ p1’ R 22’ q1’ R 23’ r1’ ) units may each independently be an integer of 1 to 3, an integer of 2 to 3, or 3. In a preferred embodiment, p1' is 3.

[0104] In one embodiment, q1' is (SiR 21’ p1’ R 22’ q1’ R 23’ r1’ ) units each independently represents an integer of 1 to 3, preferably an integer of 2 or 3, and more preferably 3.

[0105] In one embodiment, p1' is 0 and q1' is (SiR 21’ p1’ R 22’ q1’ R 23’ r1’ ) units each independently represents an integer of 1 to 3, preferably an integer of 2 or 3, and more preferably 3.

[0106] Above R 22 is independently at each occurrence a hydroxyl group or a hydrolyzable group.

[0107] R 22 is preferably, independently at each occurrence, a hydrolyzable group.

[0108] R 22 is preferably, independently at each occurrence, -OR h , -OCOR h , -ON=CR h 2, -NR h 2, -NHR h or halogen (wherein R h is a substituted or unsubstituted C 1-4 alkyl group), more preferably -OR h (i.e., an alkoxy group). h Examples of R include unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl; and substituted alkyl groups such as chloromethyl. Among them, alkyl groups, particularly unsubstituted alkyl groups, are preferred, and methyl or ethyl groups are more preferred. In one embodiment, R h is a methyl group, and in another embodiment, R h is an ethyl group.

[0109] Above R 23 is independently at each occurrence a hydrogen atom or a monovalent organic group. Such monovalent organic groups are monovalent organic groups other than the hydrolyzable groups described above.

[0110] R 23In the above, the monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is preferably an alkyl group, more preferably a methyl group.

[0111] The above p1 is independently an integer of 0 to 3 in each occurrence, q1 is independently an integer of 0 to 3 in each occurrence, and r1 is independently an integer of 0 to 3 in each occurrence. The sum of p1, q1, and r1 is (SiR 21 p1 R 22 q1 R 23 r1 ) units, it is 3.

[0112] In one embodiment, p1 is 0.

[0113] In one embodiment, p1 is (SiR 21 p1 R 22 q1 R 23 r1 ) units may each independently be an integer of 1 to 3, an integer of 2 to 3, or 3. In a preferred embodiment, p1 is 3.

[0114] In one embodiment, q1 is (SiR 21 p1 R 22 q1 R 23 r1 ) units each independently represents an integer of 1 to 3, preferably an integer of 2 or 3, and more preferably 3.

[0115] In one embodiment, p1 is 0 and q1 is (SiR 21 p1 R 22 q1 R 23 r1 ) units each independently represents an integer of 1 to 3, preferably an integer of 2 or 3, and more preferably 3.

[0116] In the above formula, R b1 is independently at each occurrence a hydroxyl group or a hydrolyzable group.

[0117] Above R b1 is preferably, independently at each occurrence, a hydrolyzable group.

[0118] Above R b1 is preferably, independently at each occurrence, -OR h , -OCOR h , -ON=CR h 2, -NR h 2, -NHR h or halogen (wherein R h is a substituted or unsubstituted C 1-4 alkyl group), more preferably -OR h (i.e., an alkoxy group). h Examples of R include unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl; and substituted alkyl groups such as chloromethyl. Among them, alkyl groups, particularly unsubstituted alkyl groups, are preferred, and methyl or ethyl groups are more preferred. In one embodiment, R h is a methyl group, and in another embodiment, R h is an ethyl group.

[0119] In the above formula, R c1 is independently at each occurrence a hydrogen atom or a monovalent organic group. Such monovalent organic groups are monovalent organic groups other than the hydrolyzable groups described above.

[0120] Above R c1 In the above, the monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is preferably an alkyl group, more preferably a methyl group.

[0121] The above k1 is independently an integer of 0 to 3 in each occurrence, l1 is independently an integer of 0 to 3 in each occurrence, and m1 is independently an integer of 0 to 3 in each occurrence. The sum of k1, l1, and m1 is (SiR a1 k1 R b1 l1 R c1 m1 ) units, it is 3.

[0122] In one embodiment, k1 is (SiR a1 k1 R b1 l1 R c1 m1 ) units are each independently an integer of 1 to 3, preferably 2 or 3, and more preferably 3. In a preferred embodiment, k1 is 3.

[0123] In the above formulas (1) and (2), R Si When is a group represented by formula (S3), preferably, in the terminal portion of formula (1) and formula (2), there are at least two Si atoms to which hydroxyl groups or hydrolyzable groups are bonded.

[0124] In a preferred embodiment, the group represented by formula (S3) is -Z 1 -SiR 22 q1 R 23 r1 (wherein q1 is an integer of 1 to 3, preferably 2 or 3, more preferably 3, and r1 is an integer of 0 to 2); -Z 1’ -SiR 22’ q1’ R 23’ r1’ (wherein q1' is an integer of 1 to 3, preferably 2 or 3, more preferably 3, and r1' is an integer of 0 to 2), or -Z 1” -SiR 22” q1” R 23” r1”(wherein q1″ is an integer of 1 to 3, preferably 2 or 3, and more preferably 3; and r1″ is an integer of 0 to 2).

[0125] In a preferred embodiment, in formula (S3), R 21’ When present, at least one, and preferably all, R 21’ In the above formula, q1″ is an integer of 1 to 3, preferably 2 or 3, and more preferably 3.

[0126] In a preferred embodiment, in formula (S3), R 21 When present, at least one, and preferably all, R 21 In the above formula, p1' is 0, and q1' is an integer of 1 to 3, preferably 2 or 3, and more preferably 3.

[0127] In a preferred embodiment, in formula (S3), R a1 When present, at least one, and preferably all, R a1 In the above formula, p1 is 0, and q1 is an integer of 1 to 3, preferably 2 or 3, and more preferably 3.

[0128] In a preferred embodiment, in formula (S3), k1 is 2 or 3, preferably 3; p1 is 0; and q1 is 2 or 3, preferably 3.

[0129] R d1 may each independently in each occurrence be -Z 2 -CR 31 p2 R 32 q2 R 33 r2 It is.

[0130] Z 2 is independently a single bond, an oxygen atom, or a divalent organic group in each occurrence. 2 The structure written as is shown on the right side (CR 31 p2 R 32q2 R 33 r2 )

[0131] In a preferred embodiment, Z 2 is a divalent organic group.

[0132] Above Z 2 is preferably C 1-6 Alkylene group, -(CH2) z5 -O-(CH2) z6 - (wherein z5 is an integer of 0 to 6, for example, an integer of 1 to 6, and z6 is an integer of 0 to 6, for example, an integer of 1 to 6), or -(CH2) z7 -Phenylene-(CH2) z8 - (wherein z7 is an integer of 0 to 6, for example, an integer of 1 to 6, and z8 is an integer of 0 to 6, for example, an integer of 1 to 6). 1-6 The alkylene groups may be linear or branched, but are preferably linear. These groups may contain, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 It may be substituted by one or more substituents selected from alkynyl groups, but is preferably unsubstituted.

[0133] In a preferred embodiment, Z 2 is C 1-6 Alkylene group or -(CH2) z7 -Phenylene-(CH2) z8 -, preferably -phenylene-(CH2) z8 -It is. 2 is such a group, light resistance, particularly ultraviolet resistance, can be improved.

[0134] In another preferred embodiment, the Z 2 is C 1-3 In one embodiment, Z is an alkylene group. 2 can be -CH2CH2CH2-. In another embodiment, Z 2 can be -CH2CH2-.

[0135] R 31 may each independently in each occurrence be -Z 2’ -CR 32’ q2’ R 33’ r2’ It is.

[0136] Z 2’ is independently a single bond, an oxygen atom, or a divalent organic group in each occurrence. 2’ The structure written as is shown on the right side (CR 32’ q2’ R 33’ r2’ )

[0137] Above Z 2’ is preferably C 1-6 Alkylene group, -(CH2) z5’ -O-(CH2) z6’ - (wherein z5' is an integer of 0 to 6, for example, an integer of 1 to 6, and z6' is an integer of 0 to 6, for example, an integer of 1 to 6), or -(CH2) z7’ -Phenylene-(CH2) z8’ - (wherein z7' is an integer of 0 to 6, for example, an integer of 1 to 6, and z8' is an integer of 0 to 6, for example, an integer of 1 to 6). 1-6 The alkylene groups may be linear or branched, but are preferably linear. These groups may contain, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 It may be substituted by one or more substituents selected from alkynyl groups, but is preferably unsubstituted.

[0138] In a preferred embodiment, Z 2’ is C 1-6 Alkylene group or -(CH2) z7’ -Phenylene-(CH2) z8’ -, preferably -phenylene-(CH2) z8’ -It is. 2’is such a group, light resistance, particularly ultraviolet resistance, can be improved.

[0139] In another preferred embodiment, the Z 2’ is C 1-3 In one embodiment, Z is an alkylene group. 2’ can be -CH2CH2CH2-. In another embodiment, Z 2’ can be -CH2CH2-.

[0140] Above R 32’ may each independently in each occurrence be -Z 3 -SiR 34 n2 R 35 3-n2 It is.

[0141] Above Z 3 is independently a single bond, an oxygen atom, or a divalent organic group in each occurrence. 3 The structure written as is shown on the right side (SiR 34 n2 R 35 3-n2 )

[0142] In one embodiment, Z 3 is an oxygen atom.

[0143] In one embodiment, Z 3 is a divalent organic group.

[0144] Above Z 3 is preferably C 1-6 Alkylene group, -(CH2) z5” -O-(CH2) z6” - (wherein z5" is an integer of 0 to 6, for example, an integer of 1 to 6, and z6" is an integer of 0 to 6, for example, an integer of 1 to 6), or -(CH2) z7” -Phenylene-(CH2) z8” - (wherein z7" is an integer of 0 to 6, for example, an integer of 1 to 6, and z8" is an integer of 0 to 6, for example, an integer of 1 to 6). 1-6The alkylene groups may be linear or branched, but are preferably linear. These groups may contain, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 It may be substituted by one or more substituents selected from alkynyl groups, but is preferably unsubstituted.

[0145] In a preferred embodiment, Z 3 is C 1-6 Alkylene group or -(CH2) z7” -Phenylene-(CH2) z8” -, preferably -phenylene-(CH2) z8” -It is. 3 is such a group, light resistance, particularly ultraviolet resistance, can be improved.

[0146] In another preferred embodiment, the Z 3 is C 1-3 In one embodiment, Z is an alkylene group. 3 can be -CH2CH2CH2-. In another embodiment, Z 3 can be -CH2CH2-.

[0147] Above R 34 is independently at each occurrence a hydroxyl group or a hydrolyzable group.

[0148] R 34 is preferably, independently at each occurrence, a hydrolyzable group.

[0149] R 34 is preferably, independently at each occurrence, -OR h , -OCOR h , -ON=CR h 2, -NR h 2, -NHR h or halogen (wherein R h is a substituted or unsubstituted C 1-4 alkyl group), more preferably -OR h(i.e., an alkoxy group). h Examples of R include unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl; and substituted alkyl groups such as chloromethyl. Among them, alkyl groups, particularly unsubstituted alkyl groups, are preferred, and methyl or ethyl groups are more preferred. In one embodiment, R h is a methyl group, and in another embodiment, R h is an ethyl group.

[0150] Above R 35 is independently at each occurrence a hydrogen atom or a monovalent organic group. Such monovalent organic groups are monovalent organic groups other than the hydrolyzable groups described above.

[0151] Above R 35 In the above, the monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is preferably an alkyl group, more preferably a methyl group.

[0152] In the above formula, n2 is (SiR 34 n2 R 35 3-n2 ) units are each independently an integer of 0 to 3. Si is a group represented by formula (S4), n2 is 1 to 3 in the terminal portion of formula (1) and formula (2) (SiR 34 n2 R 35 3-n2 ) unit is present. That is, in such terminal portions, all n2 are not simultaneously 0. In other words, in the terminal portions of formula (1) and formula (2), there is at least one Si atom to which a hydroxyl group or a hydrolyzable group is bonded.

[0153] n2 is (SiR 34 n2 R 35 3-n2) units are each independently preferably an integer of 1 to 3, more preferably 2 or 3, and even more preferably 3.

[0154] Above R 33’ is independently at each occurrence a hydrogen atom, a hydroxyl group, or a monovalent organic group. Such monovalent organic groups are monovalent organic groups other than the above-mentioned hydrolyzable groups.

[0155] Above R 33’ In the above, the monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is preferably an alkyl group, more preferably a methyl group.

[0156] In one embodiment, R 33’ is a hydroxyl group.

[0157] In another embodiment, R 33’ The monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is an alkyl group.

[0158] The above q2' is independently an integer of 0 to 3 in each occurrence, and the above r2' is independently an integer of 0 to 3 in each occurrence. The sum of q2' and r2' is not more than (CR 32’ q2’ R 33’ r2’ ) units, it is 3.

[0159] q2' is (CR 32’ q2’ R 33’ r2’ ) units are each independently preferably an integer of 1 to 3, more preferably 2 or 3, and even more preferably 3.

[0160] R 32 may each independently in each occurrence be -Z 3 -SiR 34 n2 R 353-n2 This is -Z 3 -SiR 34 n2 R 35 3-n2 is the above R 32’ This has the same meaning as described above.

[0161] Above R 33 is independently at each occurrence a hydrogen atom, a hydroxyl group, or a monovalent organic group. Such monovalent organic groups are monovalent organic groups other than the above-mentioned hydrolyzable groups.

[0162] Above R 33 In the above, the monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is preferably an alkyl group, more preferably a methyl group.

[0163] In one embodiment, R 33 is a hydroxyl group.

[0164] In another embodiment, R 33 The monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is an alkyl group.

[0165] The above p2 is independently an integer of 0 to 3 in each occurrence, q2 is independently an integer of 0 to 3 in each occurrence, and r2 is independently an integer of 0 to 3 in each occurrence. The sum of p2, q2, and r2 is (CR 31 p2 R 32 q2 R 33 r2 ) units, it is 3.

[0166] In one embodiment, p2 is 0.

[0167] In one embodiment, p2 is (CR 31 p2 R 32 q2 R33 r2 ) units may each independently be an integer of 1 to 3, an integer of 2 to 3, or 3. In a preferred embodiment, p2' is 3.

[0168] In one embodiment, q2 is (CR 31 p2 R 32 q2 R 33 r2 ) units each independently represents an integer of 1 to 3, preferably an integer of 2 or 3, and more preferably 3.

[0169] In one embodiment, p2 is 0 and q2 is (CR 31 p2 R 32 q2 R 33 r2 ) units each independently represents an integer of 1 to 3, preferably an integer of 2 or 3, and more preferably 3.

[0170] Above R e1 may each independently in each occurrence be -Z 3 -SiR 34 n2 R 35 3-n2 This is -Z 3 -SiR 34 n2 R 35 3-n2 is the above R 32’ This has the same meaning as described above.

[0171] Above R f1 is independently at each occurrence a hydrogen atom, a hydroxyl group, or a monovalent organic group. Such monovalent organic groups are monovalent organic groups other than the above-mentioned hydrolyzable groups.

[0172] Above R f1 In the above, the monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is preferably an alkyl group, more preferably a methyl group.

[0173] In one embodiment, R f1 is a hydroxyl group.

[0174] In another embodiment, R f1 The monovalent organic group is preferably C 1-20 is an alkyl group, more preferably C 1-6 It is an alkyl group.

[0175] The above k2 is independently an integer of 0 to 3 in each occurrence, l2 is independently an integer of 0 to 3 in each occurrence, and m2 is independently an integer of 0 to 3 in each occurrence. The sum of k2, l2 and m2 is (CR d1 k2 R e1 l2 R f1 m2 ) units, it is 3.

[0176] In one embodiment, R Si is a group represented by formula (S4), n2 is 1 to 3, preferably 2 or 3, and more preferably 3 (SiR 34 n2 R 35 3-n2 ) units are present in each terminal portion of formula (1) and formula (2) at least two, for example, 2 to 27, preferably 2 to 9, more preferably 2 to 6, further preferably 2 to 3, and particularly preferably 3.

[0177] In a preferred embodiment, in formula (S4), R 32’ When present, at least one, and preferably all, R 32’ In the above formula, n2 is an integer of 1 to 3, preferably 2 or 3, and more preferably 3.

[0178] In a preferred embodiment, in formula (S4), R 32 When present, at least one, and preferably all, R 32 In the above formula, n2 is an integer of 1 to 3, preferably 2 or 3, and more preferably 3.

[0179] In a preferred embodiment, in formula (S4), R e1 When present, at least one, and preferably all, R a1 In the above formula, n2 is an integer of 1 to 3, preferably 2 or 3, and more preferably 3.

[0180] In a preferred embodiment, in formula (S4), k2 is 0, l2 is 2 or 3, preferably 3, and n2 is 2 or 3, preferably 3.

[0181] In one embodiment, R Si is a group represented by formula (S2), (S3) or (S4). These compounds are capable of forming a surface treatment layer having high surface slip properties.

[0182] In one embodiment, R Si is a group represented by formula (S1), (S3) or (S4). These compounds have multiple hydrolyzable groups at one end, and therefore can form a surface treatment layer that adheres strongly to the substrate and has high friction resistance.

[0183] In one embodiment, R Si is a group represented by formula (S3) or (S4). These compounds can have multiple hydrolyzable groups branched from one Si atom or C atom at one end, and therefore can form a surface treatment layer with even higher friction durability.

[0184] In one embodiment, R Si is a group represented by formula (S1).

[0185] In one embodiment, R Si is a group represented by formula (S2).

[0186] In one embodiment, R Si is a group represented by formula (S3).

[0187] In one embodiment, R Si is a group represented by formula (S4).

[0188] In the above formulas (1) and (2), X A The fluoropolyether moiety (R) is the main component that provides water repellency and surface slipperiness. F1 and R F2 ) and a portion (R Si ) is interpreted as a linker connecting the X A may be a single bond or any other group, so long as the compounds represented by formulas (1) and (2) can exist stably.

[0189] In the above formula (1), α is an integer from 1 to 9, and β is an integer from 1 to 9. These α and β are X A The sum of α and β can vary depending on the valence of X A For example, X A When X is a decavalent organic group, the sum of α and β is 10, and for example, α can be 9 and β can be 1, α can be 5 and β can be 5, or α can be 1 and β can be 9. A When is a divalent organic group, α and β are 1.

[0190] In the above formula (2), γ is an integer of 1 to 9. γ is X A That is, γ can vary depending on the valence of X A is the valence of 1 minus 0.

[0191] X A each independently represents a single bond or a divalent to decavalent organic group;

[0192] Above X A The divalent to decavalent organic group in is preferably a divalent to octavalent organic group. In one embodiment, the divalent to decavalent organic group is preferably a divalent to tetravalent organic group, more preferably a divalent organic group. In another embodiment, the divalent to decavalent organic group is preferably a trivalent to octavalent organic group, more preferably a trivalent to hexavalent organic group.

[0193] In one embodiment, X A is a single bond or a divalent organic group, α is 1, and β is 1.

[0194] In one embodiment, X A is a single bond or a divalent organic group, and γ is 1.

[0195] In one embodiment, X A is a trivalent to hexavalent organic group, α is 1, and β is 2 to 5.

[0196] In one embodiment, X A is a trivalent to hexavalent organic group, and γ is 2 to 5.

[0197] In one embodiment, X A is a trivalent organic group, α is 1, and β is 2.

[0198] In one embodiment, X A is a trivalent organic group and γ is 2.

[0199] X A When is a single bond or a divalent organic group, formulas (1) and (2) are represented by the following formulas (1') and (2'). [ka]

[0200] In one embodiment, X A is a single bond.

[0201] In another embodiment, X A is a divalent organic group.

[0202] In one embodiment, X A Examples of the group include a single bond and the group represented by the following formula: -(R 51 ) p5 -(X 51 ) q5 - [In formula: R 51 is a single bond, -(CH2) s5 - or an o-, m- or p-phenylene group, preferably -(CH2) s5 - and s5 is an integer of 1 to 20, preferably an integer of 1 to 6, more preferably an integer of 1 to 3, and even more preferably 1 or 2; X 51 is -(X 52 ) l5 - represents X 52 each occurrence independently represents -O-, -S-, o-, m-, or p-phenylene group, -C(O)O-, -Si(R 53 )2-, -(Si(R 53 )2O) m5 -Si(R 53 )2-, -CONR 54 -,-O-CONR 54 -, -NR 54 - and - (CH2) n5 represents a group selected from the group consisting of R 53 represents, independently at each occurrence, a phenyl group; C 1-6 Alkyl group or C 1-6 represents an alkoxy group, preferably a phenyl group or 1-6 is an alkyl group, more preferably a methyl group; R 54 is independently at each occurrence a hydrogen atom, a phenyl group or C 1-6 represents an alkyl group (preferably a methyl group); m5, in each occurrence, is independently an integer from 1 to 100, preferably an integer from 1 to 20; n5, in each occurrence, is independently an integer from 1 to 20, preferably an integer from 1 to 6, more preferably an integer from 1 to 3; l5 is an integer from 1 to 10, preferably an integer from 1 to 5, and more preferably an integer from 1 to 3; p5 is 0 or 1; q5 is 0 or 1, wherein at least one of p5 and q5 is 1, and the order of the repeating units enclosed in parentheses with p5 or q5 is arbitrary. Here, X is a divalent organic group represented by the formula: A (Typically X A Hydrogen atoms of C 1-3 Alkyl groups and C 1-3 In a preferred embodiment, X A is not substituted with these groups.

[0203] In a preferred embodiment, the X A are each independently -(R 51 ) p5 -(X 51 ) q5 -R 52 -It is. 52 is a single bond, -(CH2) t5 - or an o-, m- or p-phenylene group, preferably -(CH2) t5 t5 is an integer of 1 to 20, preferably an integer of 2 to 6, and more preferably an integer of 2 to 3. 52 (Typically R 52 Hydrogen atoms of C 1-3 Alkyl groups and C 1-3 In a preferred embodiment, R 56 is not substituted with these groups.

[0204] Preferably, the above X A are each independently Single bond, -C 1-20 An alkylene group, -R 51 -X 53 -R 52 -,or -X 54 -R 5 - [In the formula, R 51 and R52 has the same meaning as above, X 53 teeth, -O-, -S-, -C(O)O-, -CONR 54 -, -O-CONR 54 -, -Si(R 53 )2-, -(Si(R 53 )2O) m5 -Si(R 53 )2-, -O-(CH2) u5 -(Si(R 53 )2O) m5 -Si(R 53 )2-, -O-(CH2) u5 -Si(R 53 )2-O-Si(R 53 )2-CH2CH2-Si(R 53 )2-O-Si(R 53 )2-, -O-(CH2) u5 -Si(OCH3)2OSi(OCH3)2-, -CONR 54 -(CH2) u5 -(Si(R 53 )2O) m5 -Si(R 53 )2-, -CONR 54 -(CH2) u5 -N(R 54 )-,or -CONR 54 -(o-, m- or p-phenylene)-Si(R 53 )2- (In the formula, R 53 , R 54 and m5 has the same meaning as above, u5 is an integer of 1 to 20, preferably an integer of 2 to 6, and more preferably an integer of 2 to 3. X 54 teeth, -S-, -C(O)O-, -CONR 54 -, -O-CONR 54 -, -CONR 54 -(CH2) u5 -(Si(R 54 )2O) m5 -Si(R 54 )2-, -CONR 54 -(CH2) u5 -N(R 54 )-,or -CONR 54 -(o-, m- or p-phenylene)-Si(R 54 )2- (In the formula, each symbol has the same meaning as above.) represents.] It could be.

[0205] More preferably, the above X A are each independently Single bond, -C 1-20 An alkylene group, -(CH2) s5 -X 53 -, -(CH2) s5 -X 53 -(CH2) t5 - -X 54 -,or -X 54 -(CH2) t5 - [In the formula, X 53 , X 54 , s5 and t5 are as defined above.] It is.

[0206] More preferably, the above X A are each independently Single bond, -C 1-20 An alkylene group, -(CH2) s5 -X 53 -(CH2) t5 -,or -X 54 -(CH2) t5 - [In the formula, each symbol has the same meaning as above.] It could be.

[0207] In a preferred embodiment, the X A are each independently Single bond -C 1-20 An alkylene group, -(CH2) s5 -X 53 -,or -(CH2) s5 -X 53 -(CH2) t5 - [In the formula, X 53 -O-, -CONR 54 -, or -O-CONR 54 - and R 54 is independently at each occurrence a hydrogen atom, a phenyl group or C 1-6 represents an alkyl group, s5 is an integer from 1 to 20; t5 is an integer from 1 to 20. It could be.

[0208] In one embodiment, the X A are each independently Single bond, -C 1-20 An alkylene group, -(CH2) s5 -O-(CH2) t5 -, -(CH2) s5 -(Si(R 53 )2O) m5 -Si(R 53 )2-(CH2) t5 -, -(CH2) s5 -O-(CH2) u5 -(Si(R 53 )2O) m5 -Si(R 53)2-(CH2) t5 -,or -(CH2) s5 -O-(CH2) t5 -Si(R 53 )2-(CH2) u5 -Si(R 53 )2-(C v H 2v )- [In the formula, R 53 m5, s5, t5 and u5 are the same as defined above, and v5 is an integer of 1 to 20, preferably an integer of 2 to 6, and more preferably an integer of 2 to 3.] It is.

[0209] In the above formula, -(C v H 2v )- may be straight chain or branched, for example, -CH2CH2-, -CH2CH2CH2-, -CH(CH3)-, -CH(CH3)CH2-.

[0210] Above X A are each independently a fluorine atom, C 1-3 Alkyl groups and C 1-3 Fluoroalkyl groups (preferably C 1-3 perfluoroalkyl groups). In one embodiment, X A is non-substituted.

[0211] Furthermore, the above X A The left side of each equation is R F1 or R F2 and the right side is R Si Bind to.

[0212] In one embodiment, X A are each independently -OC 1-6 It may be other than an alkylene group.

[0213] In another embodiment, X A Examples of the groups include the following: [ka] [ka] [In the formula, R 41 are each independently a hydrogen atom, a phenyl group, an alkyl group having 1 to 6 carbon atoms, or 1-6 an alkoxy group, preferably a methyl group; D is -CH2O(CH2)2-, -CH2O(CH2)3-, -CF2O(CH2)3-, -(CH2)2-, -(CH2)3-, -(CH2)4-, -CONH-(CH2)3-, -CON(CH3)-(CH2)3-, -CON(Ph)-(CH2)3-, where Ph means phenyl, and [ka] (In the formula, R 42 are each independently a hydrogen atom, C 1-6 or C 1-6 represents an alkoxy group, preferably a methyl group or a methoxy group, and more preferably a methyl group. is a group selected from E is -(CH2) n - (n is an integer from 2 to 6), D is the R of the molecular backbone F1 or R F2 and E is R Si Binds to .]

[0214] Above X A Specific examples include: Single bond, -CH2OCH2-, -CH2O(CH2)2-, -CH2O(CH2)3-, -CH2O(CH2)4-, -CH2O(CH2)5-, <h2 style=";text-align:left;direction:ltr">-CH2O(CH2)6-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CF2-CH2-O-CH2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CF2-CH2-O-(CH2)2-<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CF2-CH2-O-(CH2)3-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CF2-CH2-O-(CH2)6-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2O(CH2)3Si(CH3)2OSi(CH3)2(CH2)2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2O(CH2)3Si(CH3)2OSi(CH3)2OSi(CH3)2(CH2)2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2O(CH2)3Si(CH3)2O(Si(CH3)2O)2Si(CH3)2(CH2)2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2O(CH2)3Si(CH3)2O(Si(CH3)2O)3Si(CH3)2(CH2)2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2O(CH2)3Si(CH3)2O(Si(CH3)2O)<h2 style=";text-align:left;direction:ltr"> 10 <h2 style=";text-align:left;direction:ltr"> Si(CH3)2(CH2)2-<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2O(CH2)3Si(CH3)2O(Si(CH3)2O)<h2 style=";text-align:left;direction:ltr"> 20 <h2 style=";text-align:left;direction:ltr"> Si(CH3)2(CH2)2-<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCF2CHFOCF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCF2CHFOCF2CF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCF2CHFOCF2CF2CF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCH2CF2CF2OCF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCH2CF2CF2OCF2CF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCH2CF2CF2OCF2CF2CF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCH2CF2CF2OCF(CF3)CF2OCF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCH2CF2CF2OCF(CF3)CF2OCF2CF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCH2CF2CF2OCF(CF3)CF2OCF2CF2CF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCH2CHFCF2OCF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCH2CHFCF2OCF2CF2-、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> -CH2OCH2CHFCF2OCF2CF2CF2-、<h2 style=";text-align:left;direction:ltr"> -CH2OCH2CHFCF2OCF(CF3)CF2OCF2-、 -CH2OCH2CHFCF2OCF(CF3)CF2OCF2CF2-、 -CH2OCH2CHFCF2OCF(CF3)CF2OCF2CF2CF2-、 -CH2OCF2CHFOCF2CF2CF2-C(O)NH-CH2-、 -CH2OCH2(CH2)7CH2Si(OCH3)2OSi(OCH3)2(CH2)2Si(OCH3)2OSi(OCH3)2(CH2)2-、 -CH2OCH2CH2CH2Si(OCH3)2OSi(OCH3)2(CH2)3-、 -CH2OCH2CH2CH2Si(OCH2CH3)2OSi(OCH2CH3)2(CH2)3-、 -CH2OCH2CH2CH2Si(OCH3)2OSi(OCH3)2(CH2)2-、 -CH2OCH2CH2CH2Si(OCH2CH3)2OSi(OCH2CH3)2(CH2)2-、 -(CH2)2-Si(CH3)2-(CH2)2-、 -CH2-、 -(CH2)2-、 -(CH2)3-、 -(CH2)4-、 -(CH2)5-、 -(CH2)6-、 -CF2-CH2-、 -CF2-(CH2)2-、 -CF2-(CH2)3-、 -CF2-(CH2)4-、 -CF2-(CH2)5-、 -CF2-(CH2)6-、 -CO-、 -CONH-、 -CONH-CH2-、 -CONH-(CH2)2-、 -CONH-(CH2)3-、 -CONH-(CH2)4-、 -CONH-(CH2)5-、 -CONH-(CH2)6-, -CF2CONHCH2-, -CF2CONH(CH2)2-, -CF2CONH(CH2)3-, -CF2CONH(CH2)4-, -CF2CONH(CH2)5-, -CF2CONH(CH2)6-, -CON(CH3)-CH2-, -CON(CH3)-(CH2)2-, -CON(CH3)-(CH2)3-, -CON(CH3)-(CH2)4-, -CON(CH3)-(CH2)5-, -CON(CH3)-(CH2)6-, -CON(Ph)-CH2- (wherein Ph means phenyl), -CON(Ph)-(CH2)2- (wherein Ph means phenyl), -CON(Ph)-(CH2)3- (wherein Ph means phenyl), -CON(Ph)-(CH2)4- (wherein Ph means phenyl), -CON(Ph)-(CH2)5- (wherein Ph means phenyl), -CON(Ph)-(CH2)6- (wherein Ph means phenyl), -CF2-CON(CH3)-(CH2)3-, -CF2-CON(Ph)-(CH2)3- (wherein Ph means phenyl), -CF2-CON(CH3)-(CH2)6-, -CF2-CON(Ph)-(CH2)6- (wherein Ph means phenyl), -CONH-(CH2)2NH(CH2)3-, -CONH-(CH2)6NH(CH2)3-, -CH2O-CONH-(CH2)3-, -CH2O-CONH-(CH2)6-, -S-(CH2)3-, -(CH2)2S(CH2)3-、 -CONH-(CH2)3Si(CH3)2OSi(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2OSi(CH3)2OSi(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2O(Si(CH3)2O)2Si(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2O(Si(CH3)2O)3Si(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2O(Si(CH3)2O) 10 Si(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2O(Si(CH3)2O) 20 Si(CH3)2(CH2)2-、 -C(O)O-(CH2)3-、 -C(O)O-(CH2)6-、 -CH2-O-(CH2)3-Si(CH3)2-(CH2)2-Si(CH3)2-(CH2)2-、 -CH2-O-(CH2)3-Si(CH3)2-(CH2)2-Si(CH3)2-CH(CH3)-、 -CH2-O-(CH2)3-Si(CH3)2-(CH2)2-Si(CH3)2-(CH2)3-、 -CH2-O-(CH2)3-Si(CH3)2-(CH2)2-Si(CH3)2-CH(CH3)-CH2-、 -OCH2-、 -O(CH2)3-、 -OCFHCF2-、

Chem.

[0215] In yet another aspect, X A is, each independently, of the formula: -(R 16 ) x1 -(CFR 17 ) y1 -(CH2)z1 In the formula, x1, y1 and z1 each independently represent an integer of 0 to 10, the sum of x1, y1 and z1 is 1 or more, and the order of the repeating units enclosed in parentheses in the formula is arbitrary.

[0216] In the above formula, R 16 is independently at each occurrence an oxygen atom, phenylene, carbazolylene, -NR 18 -(In the formula, R 18 represents a hydrogen atom or an organic group) or a divalent organic group. 18 is an oxygen atom or a divalent polar group.

[0217] The above-mentioned "divalent polar group" is not particularly limited, but examples thereof include -C(O)-, -C(=NR 19 )-, and -C(O)NR 19 - (wherein R 19 represents a hydrogen atom or a lower alkyl group. The "lower alkyl group" is, for example, an alkyl group having 1 to 6 carbon atoms, such as methyl, ethyl, and n-propyl, which may be substituted with one or more fluorine atoms.

[0218] In the above formula, R 17 are each independently a hydrogen atom, a fluorine atom or a lower fluoroalkyl group, preferably a fluorine atom, in each occurrence. The "lower fluoroalkyl group" is, for example, a fluoroalkyl group having 1 to 6 carbon atoms, preferably a fluoroalkyl group having 1 to 3 carbon atoms, preferably a perfluoroalkyl group having 1 to 3 carbon atoms, more preferably a trifluoromethyl group, a pentafluoroethyl group, and further preferably a trifluoromethyl group.

[0219] In yet another embodiment, X A Examples of include the following groups: [ka] [In the formula, R 41are each independently a hydrogen atom, a phenyl group, an alkyl group having 1 to 6 carbon atoms, or 1-6 The alkoxy group is preferably a methyl group; each X A In the group, any one of T may be an R F1 or R F2 The following groups are attached to: -CH2O(CH2)2-, -CH2O(CH2)3-, -CF2O(CH2)3-, -(CH2)2-, -(CH2)3-, -(CH2)4-, -CONH-(CH2)3-, -CON(CH3)-(CH2)3-, -CON(Ph)-(CH2)3-, where Ph is phenyl, or [ka] [In the formula, R 42 are each independently a hydrogen atom, C 1-6 or C 1-6 represents an alkoxy group, preferably a methyl group or a methoxy group, and more preferably a methyl group. Some of the other Ts are R in the molecular backbone. Si and if present, each remaining T is independently a methyl group, a phenyl group, or a C 1-6 It is an alkoxy group, a radical scavenger group, or an ultraviolet absorbing group.

[0220] The radical scavenging group is not particularly limited as long as it can capture radicals generated by light irradiation, and examples thereof include residues of benzophenones, benzotriazoles, benzoic acid esters, phenyl salicylates, crotonic acids, malonic acid esters, organoacrylates, hindered amines, hindered phenols, and triazines.

[0221] The ultraviolet absorbing group is not particularly limited as long as it can absorb ultraviolet light, and examples thereof include residues of benzotriazoles, hydroxybenzophenones, esters of substituted and unsubstituted benzoic acid or salicylic acid compounds, acrylates or alkoxycinnamates, oxamides, oxanilides, benzoxazinones, and benzoxazoles.

[0222] In a preferred embodiment, preferred radical scavenging groups or UV absorbing groups include [ka] Examples include:

[0223] In this embodiment, X A may each independently be a trivalent to decavalent organic group.

[0224] In yet another embodiment, X A Examples of include the following groups: [ka] [In the formula, R 25 , R 26 and R 27 are each independently a divalent to hexavalent organic group, R 25 At least one R F1 Binds to R 26 and R 27 Each has at least one R Si Binds to .]

[0225] In one embodiment, the R 25 is a single bond, C 1-20 Alkylene group, C 3-20 Cycloalkylene group, C 5-20 Arylene group, -R 57 -X 58 -R 59 -, -X 58 -R 59 -, or -R 57 -X 58 -. Above, R57 and R 59 are each independently a single bond, C 1-20 Alkylene group, C 3-20 Cycloalkylene group, or C 5-20 The above X is an arylene group. 58 is -O-, -S-, -CO-, -O-CO- or -COO-.

[0226] In one embodiment, the R 26 and R 27 are each independently a hydrocarbon or a group having at least one atom selected from N, O and S at the end or in the main chain of the hydrocarbon, and are preferably 1-6 Alkyl group, -R 36 -R 37 -R 36 -, -R 36 -CHR 38 2-, etc. Here, R 36 are each independently a single bond or an alkyl group having 1 to 6 carbon atoms, preferably an alkyl group having 1 to 6 carbon atoms. 37 is N, O or S, preferably N or O. 38 -R 45 -R 46 -R 45 -, -R 46 -R 45 -or-R 45 -R 46 - Here, R 45 are each independently an alkyl group having 1 to 6 carbon atoms. 46 is N, O or S, preferably O.

[0227] In this embodiment, X A may each independently be a trivalent to decavalent organic group.

[0228] The fluoropolyether group-containing compound represented by the above formula (1) or formula (2) is not particularly limited, but may be 5×10 2 ~1×10 5Within this range, it is preferable from the viewpoint of friction durability that the average molecular weight is 2,000 to 32,000, more preferably 2,500 to 12,000. Note that the "average molecular weight" refers to a number average molecular weight, and the "average molecular weight" is 19 The value is measured by F-NMR.

[0229] In one embodiment, the fluoropolyether group-containing silane compound in the surface treatment agent of the present disclosure is a compound represented by formula (1).

[0230] In another embodiment, in the surface treatment agent of the present disclosure, the fluoropolyether group-containing silane compound is a compound represented by formula (2).

[0231] In another embodiment, in the surface treatment agent of the present disclosure, the fluoropolyether group-containing silane compound is a compound represented by formula (1) and a compound represented by formula (2).

[0232] In the surface treatment agent of the present disclosure, the compound represented by formula (2) is preferably 0.1 mol% or more and 35 mol% or less with respect to the total of the compound represented by formula (1) and the compound represented by formula (2). The lower limit of the content of the compound represented by formula (2) with respect to the total of the compound represented by formula (1) and the compound represented by formula (2) may be preferably 0.1 mol%, more preferably 0.2 mol%, even more preferably 0.5 mol%, even more preferably 1 mol%, particularly preferably 2 mol%, and especially 5 mol%. The upper limit of the content of the compound represented by formula (2) with respect to the total of the compound represented by formula (1) and the compound represented by formula (2) may be preferably 35 mol%, more preferably 30 mol%, even more preferably 20 mol%, even more preferably 15 mol% or 10 mol%. The compound represented by formula (2) is preferably 0.1 mol% or more and 30 mol% or less, more preferably 0.1 mol% or more and 20 mol% or less, even more preferably 0.2 mol% or more and 10 mol% or less, even more preferably 0.5 mol% or more and 10 mol% or less, particularly preferably 1 mol% or more and 10 mol% or less, for example, 2 mol% or more and 10 mol% or less, or 5 mol% or more and 10 mol% or less. By making the compound represented by formula (2) in such a range, the friction durability can be further improved.

[0233] The compounds represented by the above formula (1) or (2) can be obtained, for example, by the methods described in the above Patent Documents 1 and 2.

[0234] The fluoropolyether group-containing silane compound contained in the surface treatment agent of the present disclosure is produced, for example, by reacting a compound capable of introducing a hydrolyzable group, such as methanol, with a trichlorosilane derivative when introducing a hydrolyzable group into a Si atom. When produced in this manner, a certain amount of chlorine ions may be present in the surface treatment agent. The present inventors have noticed that the chlorine ions contained in the surface treatment agent affect the function of the surface treatment agent. In particular, when the chlorine ions contained in the surface treatment agent exceed 1.0 ppm by mass, the stability of the silane portion having a hydrolyzable group decreases, the reaction points with the substrate decrease, and the friction durability of the obtained surface treatment layer may decrease. In addition, there is a concern about metal corrosion due to the inclusion of chlorine ions. Furthermore, when the chlorine ions contained in the surface treatment agent are less than 0.1 ppm by mass, the catalytic effect of the chlorine ions cannot be sufficiently obtained, the adhesion of the obtained surface treatment agent decreases, and the friction durability may decrease. Therefore, the present inventors have found that the above problems can be avoided by adjusting the chlorine ion concentration in the surface treatment agent to a predetermined value of 0.1 ppm by mass or more to 1.0 ppm by mass, and have invented the surface treatment agent of the present disclosure.

[0235] The surface treatment agent of the present disclosure has a chlorine ion concentration of 0.1 mass ppm or more and 1.0 mass ppm or less. By making the chlorine ion concentration 1.0 mass ppm or less, the friction durability of the obtained surface treatment layer can be improved. Furthermore, it is advantageous for storage, and can suppress adverse effects on the device during treatment, such as corrosion of metal parts. In addition, by making the chlorine ion concentration 0.1 mass ppm or more, the friction durability of the obtained surface treatment layer can be improved.

[0236] The chloride ion concentration may be 1.0 ppm by mass or less, preferably 0.80 ppm by mass or less, and more preferably 0.70 ppm by mass or less.

[0237] The chloride ion concentration may be 0.1 ppm by mass or more, and more preferably 0.2 ppm by mass or more.

[0238] In one embodiment, the chloride ion concentration may be preferably 0.20 to 0.80 ppm by mass, for example, 0.20 to 0.70 ppm by mass, 0.30 to 0.80 ppm by mass, or 0.30 to 0.70 ppm by mass.

[0239] The chloride ion concentration contained in the surface treatment agent of the present disclosure can be measured by ion chromatography. Specifically, the chloride ion concentration can be measured by, for example, an ion chromatograph device to measure the chloride ion concentration, and the chloride ion concentration can be determined by an external standard method. The ion concentration measurement sample can be prepared, for example, by diluting the sample with hydrofluoroether such as HFE7300, and then adding ultrapure water to extract the chloride ion into the water layer. The following are examples of the device and conditions. Device name: Dionex ICS-2100 (Themo SCIENTIFIC) Column: Dionex IonPac AS20 Temperature: 30℃ Flow rate: 1.0mL / min Detector: Electrical conductivity

[0240] The chloride ion concentration in the surface treatment agent of the present disclosure can be adjusted to the chloride ion concentration in the surface treatment agent of the present disclosure by purifying a composition having a high chloride ion concentration, or by adding chlorine or a compound that generates chloride ions (e.g., HCl, a compound having a -SiCl group).

[0241] Examples of the purification method include a method of adding a metal or a metal compound to a composition having a high chloride ion concentration and heating the composition, a method of washing the composition with an excess amount of alcohol, a method of treating the composition with a metal alkoxide, or a method of subjecting the composition to an anion exchange resin.

[0242] The metals include zinc, magnesium, aluminum, and the like.

[0243] The metal compounds include organometallic compounds, preferably organozinc compounds, such as dimethylzinc and zinc octenate.

[0244] The metals and metal compounds are preferably used in powder form.

[0245] The alcohol includes hydrocarbon alcohols such as ethanol and propanol.

[0246] The metal alkoxides include basic metal alkoxides such as sodium methoxide and potassium ethoxide.

[0247] The surface treatment agent of the present disclosure may contain a solvent, a (non-reactive) fluoropolyether compound that can be understood as a fluorine-containing oil, preferably a perfluoro(poly)ether compound (hereinafter collectively referred to as a "fluorine-containing oil"), a (non-reactive) silicone compound that can be understood as a silicone oil (hereinafter referred to as a "silicone oil"), a catalyst, a surfactant, a polymerization inhibitor, a sensitizer, and the like.

[0248] Examples of the solvent include aliphatic hydrocarbons such as hexane, cyclohexane, heptane, octane, nonane, decane, undecane, dodecane, and mineral spirits; aromatic hydrocarbons such as benzene, toluene, xylene, naphthalene, and solvent naphtha; methyl acetate, ethyl acetate, propyl acetate, n-butyl acetate, isopropyl acetate, isobutyl acetate, cellosolve acetate, propylene glycol methyl ether acetate, carbitol acetate, diethyl oxalate, ethyl pyruvate, and ethyl 2-hydroxybutyrate. Esters such as ethyl acetoacetate, amyl acetate, methyl lactate, ethyl lactate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 2-hydroxyisobutyrate, ethyl 2-hydroxyisobutyrate; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, 2-hexanone, cyclohexanone, methyl amino ketone, 2-heptanone; ethyl cellosolve, methyl cellosolve acetate, ethyl cellosolve acetate, propylene glycol monomethyl ether ... glycol ethers such as propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monobutyl ether acetate, dipropylene glycol dimethyl ether, and ethylene glycol monoalkyl ether; alcohols such as methanol, ethanol, iso-propanol, n-butanol, isobutanol, tert-butanol, sec-butanol, 3-pentanol, octyl alcohol, 3-methyl-3-methoxybutanol, and tert-amyl alcohol; glycols such as ethylene glycol and propylene glycol; cyclic ethers such as tetrahydrofuran, tetrahydropyran, and dioxane; amides such as N,N-dimethylformamide and N,N-dimethylacetamide; ether alcohols such as methyl cellosolve, cellosolve, isopropyl cellosolve, butyl cellosolve, and diethylene glycol monomethyl ether; diethylene glycol monoethyl ether acetate;Examples of the fluorine-containing solvent include 1,1,2-trichloro-1,2,2-trifluoroethane, 1,2-dichloro-1,1,2,2-tetrafluoroethane, dimethyl sulfoxide, 1,1-dichloro-1,2,2,3,3-pentafluoropropane (HCFC225), Zeorora H, HFE7100, HFE7200, and HFE7300. Alternatively, examples of the solvent include a mixed solvent of two or more of these solvents.

[0249] The fluorine-containing oil is not particularly limited, but examples thereof include compounds represented by the following general formula (3) (perfluoro(poly)ether compounds). Rf 5 -(OC4F8) a’ -(OC3F6) b’ -(OC2F4) c’ -(OCF2) d’ -Rf 6 (3) In the formula, Rf 5 is an alkyl group having 1 to 16 carbon atoms which may be substituted with one or more fluorine atoms (preferably, 1―16 Rf represents a perfluoroalkyl group; 6 is an alkyl group having 1 to 16 carbon atoms which may be substituted with one or more fluorine atoms (preferably, 1-16 perfluoroalkyl group), a fluorine atom or a hydrogen atom, Rf 5 and Rf 6 More preferably, each independently represents C 1-3 It is a perfluoroalkyl group. a', b', c' and d' respectively represent the number of four types of repeating units of the perfluoro(poly)ether constituting the main skeleton of the polymer, and are each independently an integer of 0 to 300, and the sum of a', b', c' and d' is at least 1, preferably 1 to 300, and more preferably 20 to 300. The order of the repeating units enclosed in parentheses with the subscript a', b', c' or d' is arbitrary in the formula. Among these repeating units, -(OC4F8)- may be any of -(OCF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2)-, -(OCF2CF(CF3)CF2)-, -(OCF2CF2CF(CF3))-, -(OC(CF3)2CF2)-, -(OCF2C(CF3)2)-, -(OCF(CF3)CF(CF3))-, -(OCF(C2F5)CF2)- and (OCF2CF(C2F5))-, but is preferably -(OCF2CF2CF2CF2)-. -(OC3F6)- may be any of -(OCF2CF2CF2)-, -(OCF(CF3)CF2)- and (OCF2CF(CF3))-, but is preferably -(OCF2CF2CF2)-. -(OC2F4)- may be either -(OCF2CF2)- or (OCF(CF3))-, but is preferably -(OCF2CF2)-.

[0250] Examples of the perfluoro(poly)ether compound represented by the above general formula (3) include compounds represented by the following general formulas (3a) and (3b) (which may be one type or a mixture of two or more types). Rf 5 -(OCF2CF2CF2) b” -Rf 6 (3a) Rf 5 -(OCF2CF2CF2CF2) a” -(OCF2CF2CF2) b” -(OCF2CF2) c” -(OCF2) d” -Rf 6 (3b) In these formulas, Rf 5 and Rf 6is as defined above; in formula (3a), b" is an integer of 1 or more and 100 or less; in formula (3b), a" and b" are each independently an integer of 0 or more and 30 or less, and c" and d" are each independently an integer of 1 or more and 300 or less. The order of occurrence of each repeating unit enclosed in parentheses with the subscripts a", b", c", and d" is arbitrary in the formula.

[0251] From another perspective, the fluorine-containing oil is represented by the general formula Rf 3 -F(where Rf 3 is C 5-16 It may be a compound represented by the formula: embedded image which is a perfluoroalkyl group. It may also be a chlorotrifluoroethylene oligomer.

[0252] The above-mentioned fluorine-containing oil may have an average molecular weight of 500 to 10000. The molecular weight of the fluorine-containing oil can be measured using GPC.

[0253] The fluorinated oil may be contained in an amount of, for example, 0 to 50 mass%, preferably 0 to 30 mass%, more preferably 0 to 5 mass% relative to the composition of the present disclosure. In one embodiment, the composition of the present disclosure is substantially free of fluorinated oil. "Substantially free of fluorinated oil" means that the composition does not contain any fluorinated oil at all, or may contain a very small amount of fluorinated oil.

[0254] In one embodiment, the average molecular weight of the fluorine-containing oil may be larger than the average molecular weight of the fluoropolyether group-containing compound. By setting the average molecular weight in this manner, it is possible to obtain better friction durability and surface slipperiness, particularly when the surface treatment layer is formed by vacuum deposition.

[0255] In one embodiment, the average molecular weight of the fluorine-containing oil may be smaller than the average molecular weight of the fluoropolyether group-containing compound. By setting the average molecular weight in this range, it is possible to form a cured product having high friction durability and high surface slipperiness while suppressing the decrease in transparency of the surface treatment layer obtained from the compound.

[0256] The fluorine-containing oil contributes to improving the surface slip properties of the layer formed from the composition of the present disclosure.

[0257] The silicone oil may be, for example, a linear or cyclic silicone oil having 2,000 or less siloxane bonds. The linear silicone oil may be a so-called straight silicone oil or a modified silicone oil. The straight silicone oil may be dimethyl silicone oil, methylphenyl silicone oil, or methylhydrogen silicone oil. The modified silicone oil may be a straight silicone oil modified with alkyl, aralkyl, polyether, higher fatty acid ester, fluoroalkyl, amino, epoxy, carboxyl, or alcohol. The cyclic silicone oil may be, for example, cyclic dimethylsiloxane oil.

[0258] In the composition (e.g., surface treatment agent) of the present disclosure, such silicone oil may be contained in an amount of, for example, 0 to 300 parts by mass, preferably 50 to 200 parts by mass, relative to a total of 100 parts by mass of the fluoropolyether group-containing silane compounds of the present disclosure (when two or more types are used, the total of these, the same applies below).

[0259] The silicone oil contributes to improving the surface slipperiness of the surface treatment layer.

[0260] Examples of the catalyst include acids (eg, acetic acid, trifluoroacetic acid, etc.), bases (eg, ammonia, triethylamine, diethylamine, etc.), transition metals (eg, Ti, Ni, Sn, etc.), and the like.

[0261] The catalyst promotes hydrolysis and dehydration condensation of the fluoropolyether group-containing silane compound of the present disclosure, and promotes the formation of a layer formed by the composition (eg, surface treatment agent) of the present disclosure.

[0262] Other examples of the other components include tetraethoxysilane, methyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, and methyltriacetoxysilane in addition to the above.

[0263] The composition of the present disclosure can be used as a surface treatment agent for performing surface treatment on a substrate.

[0264] The surface treatment agent of the present disclosure can be impregnated into a porous material, such as a porous ceramic material or a metal fiber, such as steel wool, and formed into a pellet. The pellet can be used, for example, in vacuum deposition.

[0265] The articles of the present disclosure are described below.

[0266] The article of the present disclosure comprises a substrate and a layer (surface treatment layer) formed on the surface of the substrate from a surface treatment agent containing the fluoropolyether group-containing silane compound of the present disclosure.

[0267] Substrates that can be used in the present disclosure may be made of any suitable material, such as glass, resin (which may be a natural or synthetic resin, for example a general plastic material, and may be in the form of a plate, film, or other form), metal, ceramics, semiconductors (silicon, germanium, etc.), fibers (woven fabrics, nonwoven fabrics, etc.), fur, leather, wood, ceramics, stone, building materials, etc.

[0268] For example, when the article to be manufactured is an optical member, the material constituting the surface of the substrate may be a material for optical members, such as glass or transparent plastic. When the article to be manufactured is an optical member, the surface (outermost layer) of the substrate may have some layer (or film), such as a hard coat layer or an antireflection layer. The antireflection layer may be either a single-layer antireflection layer or a multilayer antireflection layer. Examples of inorganic substances that can be used in the antireflection layer include SiO2, SiO, ZrO2, TiO2, TiO, Ti2O3, Ti2O5, Al2O3, Ta2O5, CeO2, MgO, Y2O3, SnO2, MgF2, and WO3. These inorganic substances may be used alone or in combination of two or more of them (for example, as a mixture). When a multilayer antireflection layer is used, it is preferable to use SiO2 and / or SiO for the outermost layer. When the product to be manufactured is an optical glass part for a touch panel, a transparent electrode, for example, a thin film using indium tin oxide (ITO) or indium zinc oxide, may be provided on a part of the surface of the substrate (glass). In addition, the substrate may have an insulating layer, an adhesive layer, a protective layer, a decorative frame layer (I-CON), an atomizing film layer, a hard coating film layer, a polarizing film, a phase difference film, and a liquid crystal display module, etc., depending on the specific specifications.

[0269] The shape of the substrate is not particularly limited. The surface region of the substrate on which the surface treatment layer is to be formed may be at least a part of the substrate surface, and may be appropriately determined depending on the application and specific specifications of the product to be manufactured.

[0270] Such a substrate may be made of a material that originally has hydroxyl groups at least on its surface. Examples of such materials include glass, metals (particularly base metals), ceramics, semiconductors, etc., on whose surfaces natural oxide films or thermal oxide films are formed. Alternatively, in cases where the substrate has insufficient hydroxyl groups, such as resins, or where the substrate does not originally have hydroxyl groups, the substrate may be subjected to some pretreatment to introduce or increase the number of hydroxyl groups on the substrate surface. Examples of such pretreatment include plasma treatment (e.g., corona discharge) and ion beam irradiation. Plasma treatment can introduce or increase hydroxyl groups on the substrate surface, and can also be suitably used to clean the substrate surface (remove foreign matter, etc.). Another example of such pretreatment is a method in which an interface adsorbent having a carbon-carbon unsaturated bond group is formed in advance in the form of a monomolecular film on the substrate surface by the LB method (Langmuir-Blodgett method) or chemical adsorption method, etc., and then the unsaturated bond is cleaved in an atmosphere containing oxygen, nitrogen, etc.

[0271] Alternatively, at least the surface portion of such a substrate may be made of a material containing another reactive group, such as a silicone compound having one or more Si-H groups, or an alkoxysilane.

[0272] Next, a layer of the above-mentioned surface treatment agent of the present disclosure is formed on the surface of such a substrate, and this layer is post-treated as necessary, thereby forming a layer from the surface treatment agent of the present disclosure.

[0273] The layer formation of the surface treatment agent of the present disclosure can be carried out by applying the above-mentioned composition to the surface of a substrate so as to coat the surface. The coating method is not particularly limited. For example, a wet coating method and a dry coating method can be used.

[0274] Examples of wet coating techniques include dip coating, spin coating, flow coating, spray coating, roll coating, gravure coating and similar techniques.

[0275] Examples of dry coating methods include deposition (usually vacuum deposition), sputtering, CVD, and similar methods. Specific examples of deposition methods (usually vacuum deposition) include resistance heating, electron beam, high frequency heating such as with microwaves, ion beam, and similar methods. Specific examples of CVD methods include plasma-CVD, optical CVD, thermal CVD, and similar methods.

[0276] Furthermore, coating by atmospheric pressure plasma method is also possible.

[0277] When using the wet coating method, the surface treatment agent of the present disclosure may be diluted with a solvent and then applied to the substrate surface. From the viewpoint of the stability of the composition of the present disclosure and the volatility of the solvent, the following solvents are preferably used: perfluoroaliphatic hydrocarbons having 5 to 12 carbon atoms (e.g., perfluorohexane, perfluoromethylcyclohexane, and perfluoro-1,3-dimethylcyclohexane); polyfluoroaromatic hydrocarbons (e.g., bis(trifluoromethyl)benzene); polyfluoroaliphatic hydrocarbons (e.g., C6F 13CH2CH3 (e.g., Asahiklin® AC-6000 manufactured by Asahi Glass Co., Ltd.), 1,1,2,2,3,3,4-heptafluorocyclopentane (e.g., Zeorora® H manufactured by Zeon Corporation); hydrofluoroethers (HFEs) (e.g., perfluoropropyl methyl ether (C3F7OCH3) (e.g., Novec® 7000 manufactured by Sumitomo 3M Limited), perfluorobutyl methyl ether (C4F9OCH3) (e.g., Novec® 7100 manufactured by Sumitomo 3M Limited), alkyl perfluoroalkyl ethers (perfluoroalkyl groups and alkyl groups may be linear or branched) such as perfluorobutyl ethyl ether (C4F9OC2H5) (e.g., Novec (trademark) 7200 manufactured by Sumitomo 3M Limited), perfluorohexyl methyl ether (C2F5CF(OCH3)C3F7) (e.g., Novec (trademark) 7300 manufactured by Sumitomo 3M Limited), or CF3CH2OCF2CHF2 (e.g., Asahiklin (registered trademark) AE-3000 manufactured by Asahi Glass Co., Ltd.). These solvents can be used alone or as a mixture of two or more kinds. Among them, hydrofluoroethers are preferred, and perfluorobutyl methyl ether (C4F9OCH3) and / or perfluorobutyl ethyl ether (C4F9OC2H5) are particularly preferred.

[0278] When the dry coating method is used, the surface treatment agent of the present disclosure may be subjected to the dry coating method as it is, or may be subjected to the dry coating method after being diluted with the above-mentioned solvent.

[0279] The layer formation of the surface treatment agent is preferably carried out so that the surface treatment agent of the present disclosure is present together with a catalyst for hydrolysis and dehydration condensation in the layer. Conveniently, in the case of the wet coating method, the surface treatment agent of the present disclosure may be diluted with a solvent, and then a catalyst may be added to the diluted solution of the surface treatment agent of the present disclosure immediately before application to the substrate surface. In the case of the dry coating method, the surface treatment agent of the present disclosure to which the catalyst has been added may be directly subjected to deposition (usually vacuum deposition) treatment, or a metal porous body such as iron or copper may be subjected to deposition (usually vacuum deposition) treatment using a pellet-shaped material impregnated with the surface treatment agent of the present disclosure to which the catalyst has been added.

[0280] The catalyst may be any suitable acid or base. Examples of the acid catalyst include acetic acid, formic acid, and trifluoroacetic acid. Examples of the base catalyst include ammonia and organic amines.

[0281] As described above, a layer derived from the surface treatment agent of the present disclosure is formed on the surface of the substrate, and the article of the present disclosure is manufactured. The layer obtained thereby has both high surface slippage and high friction durability. In addition to high friction durability, the layer may have water repellency, oil repellency, antifouling properties (for example, preventing adhesion of dirt such as fingerprints), waterproof properties (preventing water from penetrating into electronic components, etc.), surface slippage (or lubricity, for example, the ability to wipe off dirt such as fingerprints, and excellent tactile sensation to fingers), etc., depending on the composition of the surface treatment agent used, and may be suitably used as a functional thin film.

[0282] That is, the present disclosure further relates to an optical material having the above-mentioned surface treatment layer as the outermost layer.

[0283] Preferred examples of the optical material include optical materials relating to displays and the like, such as those exemplified below, as well as a wide variety of other optical materials: for example, displays such as cathode ray tubes (CRTs; for example, personal computer monitors), liquid crystal displays, plasma displays, organic electroluminescence displays, inorganic thin-film electroluminescence dot matrix displays, rear projection displays, vacuum fluorescent displays (VFDs), field emission displays (FEDs), and other displays, protective plates for such displays, or displays whose surfaces have been treated with an anti-reflection film.

[0284] The article having the layer obtained by the present disclosure may be an optical member, but is not particularly limited thereto. Examples of optical members include the following: lenses for glasses, etc.; front protection plates, anti-reflection plates, polarizing plates, and anti-glare plates for displays such as PDP and LCD; touch panel sheets for devices such as mobile phones and personal digital assistants; disc surfaces of optical discs such as Blu-ray (registered trademark) discs, DVD discs, CD-Rs, and MOs; optical fibers; and display surfaces of watches.

[0285] Additionally, an article having a layer obtained according to the present disclosure may be a medical device or medical material.

[0286] The thickness of the layer is not particularly limited. In the case of an optical member, the thickness of the layer is preferably in the range of 1 to 50 nm, 1 to 30 nm, and more preferably 1 to 15 nm, from the viewpoints of optical performance, surface slipperiness, friction durability, and antifouling properties.

[0287] The above is a detailed description of the article obtained by using the composition (for example, surface treatment agent) of the present disclosure. Note that the use, method of use, and method of manufacturing the article of the fluoropolyether group-containing silane compound or the composition containing the fluoropolyether group-containing silane compound of the present disclosure are not limited to the above examples. EXAMPLES

[0288] The surface treatment agent of the present invention will be described in more detail through the following examples, but the present invention is not limited to these examples. In the examples, the chemical formulas shown below all show average compositions, and the order of the respective repeating units constituting the perfluoropolyether is arbitrary.

[0289] In the following, the chloride ion concentration was measured by the following analytical method. ·Analysis method Ion Chromatography The chloride ion concentration was analyzed by measuring the chloride ions using an ion chromatograph, and the concentration was determined by the external standard method. Device name: Dionex ICS-2100 (Themo SCIENTIFIC) Column: Dionex IonPac AS20 Temperature: 30℃ Flow rate: 1.0mL / min Detector: Electrical conductivity The ion concentration measurement sample was prepared by diluting a perfluoropolyether group-containing silane compound to 10 wt % with Novec HFE7300, then adding ultrapure water to extract chloride ions into the aqueous layer.

[0290] Synthesis Example 1 In a 100mL four-neck flask equipped with a reflux condenser, a thermometer and a stirrer, 20g of a perfluoropolyether group-containing trichlorosilane compound (A) having trichlorosilane at the terminal and 20g of 1,3-bis(trifluoromethyl)benzene were charged and stirred for 30 minutes at 5°C under a nitrogen stream. Then, 35.2ml of a diethyl ether solution containing 0.7mol / L of allylmagnesium bromide was added, the temperature was raised to room temperature and stirred at this temperature for 10 hours. Then, the mixture was cooled to 5°C, 5ml of methanol was added, the temperature was raised to room temperature and insoluble matter was filtered. Then, the volatile matter was distilled off under reduced pressure, the nonvolatile matter was diluted with perfluorohexane, and a washing operation with methanol was performed three times in a separatory funnel (more specifically, an operation of maintaining fluoro-based compounds in the perfluorohexane phase (fluorous phase) and separating and removing non-fluoro-based compounds in the methanol phase (organic phase)). Subsequently, the volatile matter was distilled off under reduced pressure to obtain 18 g of a product (B) containing the following perfluoropolyether group-containing allyl compound (B) having an allyl group at its terminal. Perfluoropolyether group-containing trichlorosilane compound (A): CF3O(CF2CF2O) 15 (CF2O) 16 CF2CH2OCH2CH2CH2SiCl3 Perfluoropolyether group-containing allyl compound (B): CF3O(CF2CF2O) 15 (CF2O) 16 CF2CH2OCH2CH2CH2Si(CH2CH=CH2)3

[0291] Synthesis Example 2 In a 100mL four-neck flask equipped with a reflux condenser, a thermometer, and a stirrer, 15g of product (B) containing perfluoropolyether group-containing allyl body (B) having an allyl group at the end synthesized in Synthesis Example 1, 15g of 1,3-bis(trifluoromethyl)benzene, 0.05g of triacetoxymethylsilane, and 4.2g of trichlorosilane were charged and stirred at 5°C for 30 minutes under a nitrogen stream. Then, 0.15ml of xylene solution containing 2% Pt complex of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane was added, and the temperature was raised to 60°C and stirred at this temperature for 5 hours. Then, volatile matter was distilled off under reduced pressure to obtain 16g of product (C) containing the following perfluoropolyether group-containing trichlorosilane compound (C) having trichlorosilane at the end. Perfluoropolyether group-containing trichlorosilane compound (C): CF3O(CF2CF2O) 15 (CF2O) 16 CF2CH2OCH2CH2CH2Si(CH2CH2CH2SiCl3)3

[0292] Synthesis Example 3 In a 100mL four-neck flask equipped with a reflux condenser, a thermometer, and a stirrer, 16g of product (C) containing perfluoropolyether group-containing trichlorosilane compound (C) having trichlorosilane at the end synthesized in Synthesis Example 2 and 16g of 1,3-bis(trifluoromethyl)benzene were added and stirred for 30 minutes at 50°C under a nitrogen stream. Then, a mixed solution of 1.04g of methanol and 48g of trimethyl orthoformate was added, and the temperature was raised to 65°C and stirred at this temperature for 3 hours. Then, the mixture was cooled to room temperature, insoluble matter was filtered, and volatile matter was distilled off under reduced pressure to obtain 16g of product (D) containing the following perfluoropolyether group-containing silane compound (D) having trimethylsilyl group at the end. Perfluoropolyether group-containing silane compound (D): CF3O(CF2CF2O) 15 (CF2O) 16 CF2CH2OCH2CH2CH2Si[CH2CH2CH2Si(OCH3)3]3 (Note that the average composition contained 0.17 (CF2CF2CF2CF2O) repeating units and 0.18 (CF2CF2CF2O) repeating units, but these were omitted due to their small amounts.)

[0293] Synthesis Example 4 In a 100mL four-neck flask equipped with a reflux condenser, a thermometer, and a stirrer, 21g of the following perfluoropolyether group-containing trichlorosilane compound (E) having trichlorosilane at the end and 21g of 1,3-bis(trifluoromethyl)benzene were added and stirred at 50°C for 30 minutes under a nitrogen stream. Then, a mixed solution of 1.34g of methanol and 64g of trimethyl orthoformate was added, and the temperature was raised to 65°C and stirred at this temperature for 3 hours. After that, the mixture was cooled to room temperature, insoluble matter was filtered, and volatile matter was distilled off under reduced pressure to obtain 21g of product (F) containing the following perfluoropolyether group-containing silane compound (F) having trimethylsilyl groups at the end. Perfluoropolyether group-containing trichlorosilane compound (E): CF3O(CF2CF2OCF2CF2CF2CF2O)3CF2CF2OCF2CF2CF2CONHCH2C(CH2CH2CH2SiCl3)3 Perfluoropolyether group-containing silane compound (F): CF3O(CF2CF2OCF2CF2CF2CF2O)3CF2CF2OCF2CF2CF2CONHCH2C[CH2CH2CH2Si(OCH3)3]3

[0294] Synthesis Example 5 In a 100mL four-neck flask equipped with a reflux condenser, a thermometer, and a stirrer, 16g of the following perfluoropolyether group-containing trichlorosilane compound (G) having trichlorosilane at the terminal and 16g of 1,3-bis(trifluoromethyl)benzene were added and stirred at 50°C for 30 minutes under a nitrogen stream. Then, a mixed solution of 1.04g of methanol and 48g of trimethyl orthoformate was added, and the temperature was raised to 65°C and stirred at this temperature for 3 hours. After that, the mixture was cooled to room temperature, insoluble matter was filtered, and volatile matter was distilled off under reduced pressure to obtain 16g of product (H) containing the following perfluoropolyether group-containing silane compound (H) having trimethylsilyl groups at the terminal. Perfluoropolyether group-containing trichlorosilane compound (G): CF3O(CF2CF2O) 15 (CF2O) 16 CF2C(OCH2CH2CH2SiCl3)(CH2CH2CH2SiCl3)2 Perfluoropolyether group-containing silane compound (H): CF3O(CF2CF2O) 15 (CF2O) 16 CF2C[OCH2CH2CH2Si(OCH3)3][CH2CH2CH2Si(OCH3)3]2 (Note that the average composition contained 0.17 (CF2CF2CF2CF2O) repeating units and 0.18 (CF2CF2CF2O) repeating units, but these were omitted due to their small amounts.)

[0295] Example 1 5.0 g of product (D) containing perfluoropolyether group-containing silane compound (D) obtained in Synthesis Example 3 was diluted with 13 g of perfluorohexane, 1.5 g of methanol was added, and washing operation was performed three times. Subsequently, the lower phase was concentrated to obtain 4.0 g of perfluoropolyether group-containing silane composition (D'). As a result of analyzing the obtained composition (D') by the above-mentioned ion chromatography, the chloride ion concentration in a 10 wt% diluted solution of HFE7300 was 0.3 mass ppm.

[0296] Example 2 1.0 g of product (D) containing perfluoropolyether group-containing silane compound (D) obtained in Synthesis Example 3 was diluted with 4.0 g of perfluorohexane, followed by the addition of 3 wt% metallic zinc powder and stirring at room temperature for 2 hours. The solid content was then filtered and concentrated to obtain a non-volatile component, which was then diluted with 9.0 g of HFE7300 manufactured by NOVEC, followed by the addition of 3 wt% of activated carbon Shirasagi A manufactured by Osaka Gas Chemicals, and stirred at room temperature for 2 hours. The solid content was then filtered and concentrated to obtain 1.0 g of perfluoropolyether group-containing silane composition (D"). The obtained composition (D") was analyzed by the above-mentioned ion chromatography, and the chloride ion concentration in a 10 wt% diluted solution of HFE7300 was 0.7 mass ppm.

[0297] Example 3 5.0 g of the product (F) containing the perfluoropolyether group-containing silane compound (F) obtained in Synthesis Example 4 was washed with methanol in the same manner as in Example 1. The obtained composition (F') was analyzed by the above-mentioned ion chromatography, and as a result, the chloride ion concentration in a 10 wt % diluted solution of HFE7300 was 0.2 ppm by mass.

[0298] Example 4 1.0 g of the product (F) containing the perfluoropolyether group-containing silane compound (F) obtained in Synthesis Example 4 was treated with metallic zinc powder and activated carbon in the same manner as in Example 2. The obtained composition (F") was analyzed by the above-mentioned ion chromatography, and as a result, the chloride ion concentration in a 10 wt % diluted solution of HFE7300 was 0.7 ppm by mass.

[0299] Example 5 5.0 g of the product (H) containing the perfluoropolyether group-containing silane compound (H) obtained in Synthesis Example 5 was washed with methanol in the same manner as in Example 1. The obtained composition (H') was analyzed by the above-mentioned ion chromatography, and as a result, the chloride ion concentration in a 10 wt % diluted solution of HFE7300 was 0.2 ppm by mass.

[0300] Example 6 1.0 g of the product (H) containing the perfluoropolyether group-containing silane compound (H) obtained in Synthesis Example 5 was treated with metallic zinc powder and activated carbon in the same manner as in Example 2. The obtained composition (H") was analyzed by the above-mentioned ion chromatography, and as a result, the chloride ion concentration in a 10 wt % diluted solution of HFE7300 was 0.8 ppm by mass.

[0301] [Table 1]

[0302] Comparative Example 1 Into a 100 mL four-neck flask equipped with a reflux condenser, a thermometer, and a stirrer, 15 g of the product (B) containing the perfluoropolyether group-containing allyl compound (B) having an allyl group at the end synthesized in Synthesis Example 1, 15 g of 1,3-bis(trifluoromethyl)benzene, 3.0 g of trimethoxysilane, and 1.5×10 toluene solution of chloroplatinic acid / vinylsiloxane complex were added. -2 g of the mixture was added and stirred at 80° C. for 12 hours under a nitrogen stream. The volatile matter was then removed under reduced pressure to obtain 15 g of product (P) containing the following perfluoropolyether group-containing silane compound (D) having a trimethylsilyl group at the end. The result of analyzing the product (P) by the ion chromatography mentioned above was that the chloride ion concentration in a 10 wt % diluted solution of HFE7300 was less than 0.1 ppm by mass.

[0303] Comparative Example 2 In a 100 mL four-neck flask equipped with a reflux condenser, a thermometer, and a stirrer, add 10 g of the perfluoropolyether group-containing allyl compound (I) having an allyl group at the end, 10 g of 1,3-bis(trifluoromethyl)benzene, 2.0 g of trimethoxysilane, and 1.0 x 10 toluene solution of chloroplatinic acid / vinylsiloxane complex. -2g of the mixture was added and stirred at 80° C. for 12 hours under a nitrogen stream. The volatile matter was then removed under reduced pressure to obtain 15 g of product (Q) containing the following perfluoropolyether group-containing silane compound (F) having a trimethylsilyl group at the end. The result of analyzing the product (Q) by the ion chromatography mentioned above was that the chloride ion concentration in a 10 wt % diluted solution of HFE7300 was less than 0.1 ppm by mass. Perfluoropolyether group-containing allyl compound (I): CF3O(CF2CF2OCF2CF2CF2CF2O)3CF2CF2OCF2CF2CF2CONHCH2C(CH2CH=CH2)3

[0304] Comparative Example 3 In a 100 mL four-neck flask equipped with a reflux condenser, a thermometer, and a stirrer, add 10 g of the perfluoropolyether group-containing allyl compound (J) having an allyl group at the end, 10 g of 1,3-bis(trifluoromethyl)benzene, 2.0 g of trimethoxysilane, and 1.0 x 10 toluene solution of chloroplatinic acid / vinylsiloxane complex. -2 g of the mixture was added and stirred at 80° C. for 12 hours under a nitrogen stream. The volatile matter was then removed under reduced pressure to obtain 15 g of product (R) containing the following perfluoropolyether group-containing silane compound (H) having a trimethylsilyl group at the end. The result of analyzing the product (R) by the ion chromatography described above was that the chloride ion concentration in a 10 wt % diluted solution of HFE7300 was less than 0.1 ppm by mass. Perfluoropolyether group-containing allyl compound (J): CF3O(CF2CF2O) 15 (CF2O) 16 CF2C(OCH2CH=CH2)(CH2CH=CH2)2

[0305] Comparative Example 4 An untreated product was prepared as the product (D) obtained in Synthesis Example 3. The chloride ion concentration of the untreated product (D) was measured by the above-mentioned ion chromatography, and was found to be 6.7 ppm by mass in a 10 wt % diluted solution of HFE7300.

[0306] Comparative Example 5 An untreated product was prepared as the product (F) obtained in Synthesis Example 4. The chloride ion concentration of the untreated product (F) was measured by the above-mentioned ion chromatography, and was found to be 5.5 ppm by mass in a 10 wt % diluted solution of HFE7300.

[0307] Comparative Example 6 An untreated product was prepared as the product (H) obtained in Synthesis Example 5. The chloride ion concentration of the untreated product (H) was measured by the above-mentioned ion chromatography, and was found to be 8.7 ppm by mass in a 10 wt % diluted solution of HFE7300.

[0308] [Table 2]

[0309] (Test Example) -Friction durability evaluation A surface treatment layer was formed using a 10 wt% diluted solution of the perfluoropolyether group-containing silane compound of Examples 1 to 6 and Comparative Examples 1 to 3 in HFE7300 as a surface treatment agent. Specifically, the surface treatment agent was vacuum-deposited on chemically strengthened glass (Corning "Gorilla" glass, thickness 0.7 mm). The treatment conditions for vacuum deposition were a pressure of 3.0×10 -3 A silicon dioxide film of 7 nm was formed on the surface of the chemically strengthened glass at a pressure of 2 Pa, and then 2 mg of a surface treatment agent (i.e., 0.2 mg of a silane compound containing a perfluoropolyether group) was vapor-deposited per piece of chemically strengthened glass (55 mm × 100 mm). The chemically strengthened glass with the vapor-deposited film was then left to stand for 24 hours in an atmosphere at a temperature of 20°C and a humidity of 65%.

[0310] The surface treatment layer formed on the substrate surface as described above was evaluated for friction durability by an eraser friction durability test. Specifically, a sample article on which a surface treatment layer was formed was placed horizontally, an eraser (Kokuyo Co., Ltd., KESHI-70, plane dimensions 1 cm x 1.6 cm) was brought into contact with the surface of the surface treatment layer, a load of 500 gf was applied thereon, and then the eraser was reciprocated at a speed of 20 mm / sec while the load was applied. The static contact angle (degrees) of water was measured every 500 reciprocations. The evaluation was stopped when the measured value of the contact angle became less than 100 degrees. The number of reciprocations when the contact angle finally exceeded 100 degrees is shown in Tables 3 to 5.

[0311] Perfluoropolyether group-containing silane compounds (D) [Table 3]

[0312] Perfluoropolyether group-containing silane compounds (F) [Table 4]

[0313] Perfluoropolyether group-containing silane compounds (H) [Table 5]

[0314] From the above results, it was confirmed that higher friction durability can be obtained when a composition having a chloride ion concentration within the range of the present disclosure is used. Although the present disclosure is not bound by any theory, it is believed that when the chloride ion concentration exceeds 1.0 ppm by mass, the stability of the methoxysilane portion decreases, the reaction points with the substrate decrease, and the friction durability of the surface treatment layer decreases. When the chloride ion concentration is 0.1 to 1.0 ppm by mass, it is believed that a trace amount of chloride ion component acts as a catalyst during the reaction with glass, improving adhesion and increasing friction durability. Furthermore, when the chloride ion concentration is less than 0.1 ppm by mass, it is believed that the catalytic effect is not obtained, adhesion decreases, and friction durability decreases. [Industrial Applicability]

[0315] The surface treatment agent of the present disclosure can be suitably used to form a surface treatment layer on the surface of a wide variety of substrates, particularly on the surface of optical members that are required to have transparency.

Claims

1. The following formula (1) or (2): 【Chemical 1】 [In the formula: R Ｆ１ is independently at each occurrence Rf １ -R Ｆ -O ｑ - and; R Ｆ２ is -Rf ２ ｐ -R Ｆ -O ｑ - and; Rf １ each occurrence independently represents a C optionally substituted by one or more fluorine atoms; １－１６ is an alkyl group; Rf ２ is a C optionally substituted by one or more fluorine atoms; １－６ an alkylene group; R Ｆ is independently in each occurrence a divalent fluoropolyether group; p is 0 or 1; q is independently in each occurrence 0 or 1; R Ｓｉ is independently in each occurrence a monovalent group containing a Si atom to which is bonded a hydroxyl group, a hydrolyzable group, a hydrogen atom, or a monovalent organic group; At least one R Ｓｉ is a monovalent group containing a Si atom to which a hydroxyl group or a hydrolyzable group is bonded; X Ａ are each independently a single bond or a divalent to decavalent organic group; α is an integer from 1 to 9; β is an integer from 1 to 9; Each γ is independently an integer from 1 to 9. and chloride ions, wherein the chloride ion concentration in the surface treatment agent is 0.1 ppm by mass or more and 1.0 ppm by mass or less.

2. Rf １ independently in each occurrence, C １－１６ The surface treatment agent according to claim 1, which is a perfluoroalkyl group.

3. Rf ２ independently in each occurrence, C １－６ The surface treatment agent according to claim 1 or 2, which is a perfluoroalkylene group.

4. R Ｆ independently in each occurrence represents the formula: -(OC ６ F １２ ) ａ -(OC ５ F １０ ) ｂ -(OC ４ F ８ ) ｃ -(OC ３ R Ｆａ ６ ) ｄ -(OC ２ F ４ ) ｅ -(OCF ２ ) ｆ - [In the formula, R Ｆａ is independently in each occurrence a hydrogen atom, a fluorine atom, or a chlorine atom; a, b, c, d, e, and f each independently represent an integer of 0 to 200, the sum of a, b, c, d, e, and f is 1 or more, and the order of the repeating units enclosed in parentheses with a, b, c, d, e, or f is arbitrary in the formula.] The surface treatment agent according to any one of claims 1 to 3, wherein the group is represented by:

5. R Ｆａ The surface treatment agent according to claim 4 , wherein is a fluorine atom.

6. R Ｆ is each independently in each occurrence a group represented by the following formula (f1), (f2), (f3), (f4) or (f5): -(OC ３ F ６ ) ｄ - (f1) [In the formula, d is an integer of 1 to 200.] -(OC ４ F ８ ) ｃ -(OC ３ F ６ ) ｄ -(OC ２ F ４ ) ｅ -(OCF ２ ) ｆ - (f2) wherein c and d each independently represent an integer of 0 to 30; e and f are each independently an integer from 1 to 200; the sum of c, d, e and f is an integer from 10 to 200; The order of occurrence of each repeating unit enclosed in parentheses with the subscript c, d, e, or f is arbitrary in the formula.] -(R ６ -R ７ ) ｇ - (f3) [In the formula, R ６ is OCF ２ or O.C. ２ F ４ and R ７ is O.C. ２ F ４ , O.C. ３ F ６ , O.C. ４ F ８ , O.C. ５ F １０ and O.C. ６ F １２ or a combination of two or three groups selected from these groups; g is an integer from 2 to 100. -(OC ６ F １２ ) ａ -(OC ５ F １０ ) ｂ -(OC ４ F ８ ) ｃ -(OC ３ F ６ ) ｄ -(OC ２ F ４ ) ｅ -(OCF ２ ) ｆ - (f4) [In the formula, e is an integer of 1 or more and 200 or less, a, b, c, d, and f are each independently an integer of 0 or more and 200 or less, the sum of a, b, c, d, e, and f is at least 1, and the order of the repeating units enclosed in parentheses with a, b, c, d, e, or f is arbitrary in the formula.] -(OC ６ F １２ ) ａ -(OC ５ F １０ ) ｂ -(OC ４ F ８ ) ｃ -(OC ３ F ６ ) ｄ -(OC ２ F ４ ) ｅ -(OCF ２ ) ｆ - (f5) [In the formula, f is an integer of 1 or more and 200 or less, a, b, c, d, and e are each independently an integer of 0 or more and 200 or less, the sum of a, b, c, d, e, and f is at least 1, and the order of the repeating units enclosed in parentheses with a, b, c, d, e, or f is arbitrary in the formula.] The surface treatment agent according to any one of claims 1 to 5, wherein the group is represented by:

7. R F independently in each occurrence represents the following formula: - (OCF 2 CF 2 CF 2 CF 2 ) c - (OCF 2 CF 2 CF 2 ) d - (OCF 2 CF 2 ) e - (OCF 2 ) f - wherein c and d each independently represent an integer of 0 to 30; e and f are each independently an integer from 1 to 200; the sum of c, d, e and f is an integer from 10 to 200; The order of occurrence of each repeating unit enclosed in parentheses with the subscript c, d, e, or f is arbitrary in the formula.] The surface treatment agent according to any one of claims 1 to 6, wherein the group is represented by:

8. The surface treatment agent described in claim 7, wherein the ratio of e to f is 0.1 to 10.

9. The surface treatment agent according to claim 1, wherein the number average molecular weight of the R F1 and R F2 portions is 500 to 30,000.

10. R Ｓｉ is represented by the following formula (S1), (S2), (S3), or (S4): 【Chemistry 2】 [In the formula: R １１ is independently in each occurrence a hydroxyl group or a hydrolyzable group; R １２ is independently at each occurrence a hydrogen atom or a C 1-20 alkyl group; n1 is (SiR １１ ｎ１ R １２ ３－ｎ１ ) units are each independently an integer from 0 to 3; X １１ is independently at each occurrence a single bond or a C 1-20 alkylene group; R １３ is independently at each occurrence a hydrogen atom or a C 1-20 alkyl group; t is independently in each occurrence an integer from 2 to 10; R １４ is independently in each occurrence a hydrogen atom or a halogen atom; R ａ１ is independently at each occurrence -Z １ -SiR ２１ ｐ１ R ２２ ｑ１ R ２３ ｒ１ and Z １ are each independently in each occurrence an oxygen atom, a C 1-6 alkylene group, —(CH 2 ) z1 —O—(CH 2 ) z2 — (wherein z1 is an integer from 0 to 6 and z2 is an integer from 0 to 6), or —(CH 2 ) z3 -phenylene-(CH 2 ) z4 — (wherein z3 is an integer from 0 to 6 and z4 is an integer from 0 to 6); R ２１ is independently at each occurrence -Z １’ -SiR ２１’ ｐ１’ R ２２’ ｑ１’ R ２３’ ｒ１’ and R ２２ is independently in each occurrence a hydroxyl group or a hydrolyzable group; R ２３ is independently at each occurrence a hydrogen atom or a C 1-20 alkyl group; p1 in each occurrence is independently an integer from 0 to 3; q1 in each occurrence is independently an integer from 0 to 3; r1, in each occurrence, is independently an integer from 0 to 3; Z １’ are each independently in each occurrence a C 1-6 alkylene group, -(CH 2 ) z1' -O-(CH 2 ) z2' - (wherein z1' is an integer from 0 to 6 and z2' is an integer from 0 to 6), or -(CH 2 ) z3' -phenylene-(CH 2 ) z4' - (wherein z3' is an integer from 0 to 6 and z4' is an integer from 0 to 6); R ２１’ is independently at each occurrence -Z １” -SiR ２２” ｑ１” R ２３” ｒ１” and R ２２’ is independently in each occurrence a hydroxyl group or a hydrolyzable group; R ２３’ is independently at each occurrence a hydrogen atom or a C 1-20 alkyl group; p1' in each occurrence is independently an integer from 0 to 3; q1' in each occurrence is independently an integer from 0 to 3; r1' in each occurrence is independently an integer from 0 to 3; Z １” are each independently in each occurrence a C 1-6 alkylene group, —(CH 2 ) z1″ —O—(CH 2 ) z2″ — (wherein z1″ is an integer from 0 to 6 and z2″ is an integer from 0 to 6), or —(CH 2 ) z3″ -phenylene-(CH 2 ) z4″ — (wherein z3″ is an integer from 0 to 6 and z4″ is an integer from 0 to 6); R ２２” is independently in each occurrence a hydroxyl group or a hydrolyzable group; R ２３” is independently at each occurrence a hydrogen atom or a C 1-20 alkyl group; q1″ in each occurrence is independently an integer from 0 to 3; r1″ in each occurrence is independently an integer from 0 to 3; R ｂ１ is independently in each occurrence a hydroxyl group or a hydrolyzable group; R ｃ１ is independently at each occurrence a hydrogen atom or a C 1-20 alkyl group; k1, in each occurrence, is independently an integer from 0 to 3; l1 in each occurrence is independently an integer from 0 to 3; m1 in each occurrence is independently an integer from 0 to 3; R ｄ１ is independently at each occurrence -Z ２ -CR ３１ ｐ２ R ３２ ｑ２ R ３３ ｒ２ and Z ２ are each independently in each occurrence a C 1-6 alkylene group, —(CH 2 ) z5 —O—(CH 2 ) z6 — (wherein z5 is an integer from 0 to 6 and z6 is an integer from 0 to 6), or —(CH 2 ) z7 -phenylene-(CH 2 ) z8 — (wherein z7 is an integer from 0 to 6 and z8 is an integer from 0 to 6); R ３１ is independently at each occurrence -Z ２’ -CR ３２’ ｑ２’ R ３３’ ｒ２’ and R ３２ is independently at each occurrence -Z ３ -SiR ３４ ｎ２ R ３５ ３－ｎ２ and R ３３ is independently in each occurrence a hydrogen atom, a hydroxyl group, or a C 1-20 alkyl group; p2 in each occurrence is independently an integer from 0 to 3; q2 in each occurrence is independently an integer from 0 to 3; r2 in each occurrence is independently an integer from 0 to 3; Z ２’ are each independently in each occurrence a C 1-6 alkylene group, -(CH 2 ) z5' -O-(CH 2 ) z6' - (wherein z5' is an integer from 0 to 6 and z6' is an integer from 0 to 6), or -(CH 2 ) z7' -phenylene-(CH 2 ) z8' - (wherein z7' is an integer from 0 to 6 and z8' is an integer from 0 to 6); R ３２’ is independently at each occurrence -Z ３ -SiR ３４ ｎ２ R ３５ ３－ｎ２ and R ３３’ is independently in each occurrence a hydrogen atom, a hydroxyl group, or a C 1-20 alkyl group; q2' in each occurrence is independently an integer from 0 to 3; r2' is independently in each occurrence an integer from 0 to 3; Z ３ is independently in each occurrence a C 1-6 alkylene group, —(CH 2 ) z5″ —O—(CH 2 ) z6″ — (wherein z5″ is an integer from 0 to 6 and z6″ is an integer from 0 to 6), or —(CH 2 ) z7″ -phenylene-(CH 2 ) z8″ — (wherein z7″ is an integer from 0 to 6 and z8″ is an integer from 0 to 6); R ３４ is independently in each occurrence a hydroxyl group or a hydrolyzable group; R ３５ is independently at each occurrence a hydrogen atom or a C 1-20 alkyl group; n2 in each occurrence is independently an integer from 0 to 3; R ｅ１ is independently at each occurrence -Z ３ -SiR ３４ ｎ２ R ３５ ３－ｎ２ and R ｆ１ is independently in each occurrence a hydrogen atom, a hydroxyl group, or a C 1-20 alkyl group; k2 in each occurrence is independently an integer from 0 to 3; l2 in each occurrence is independently an integer from 0 to 3; m2 in each occurrence is independently an integer from 0 to 3; The hydrolyzable group is —OR h , —OCOR h , —ON═CR h 2 , —NR h 2 , —NHR h , or halogen (wherein R h represents a substituted or unsubstituted C 1-4 alkyl group). The surface treatment agent according to any one of claims 1 to 9, wherein the group is represented by:

11. The surface treatment agent according to any one of claims 1 to 10, wherein α, β, and γ are 1.

12. X Ａ are each independently a trivalent organic group, α is 1 and β is 2, or α is 2 and β is 1, γ is 2, The surface treatment agent according to any one of claims 1 to 10.

13. The surface treatment agent according to claim 1, wherein X A is a single bond.

14. The surface treatment agent according to any one of claims 1 to 13, wherein the chloride ion concentration in the surface treatment agent is 0.2 to 0.8 ppm by mass.

15. The surface treatment agent according to any one of claims 1 to 14, further comprising one or more other components selected from the group consisting of fluorine-containing oils, silicone oils, and catalysts.

16. The surface treatment agent according to any one of claims 1 to 15, further comprising a solvent.

17. The surface treatment agent according to any one of claims 1 to 16, which is used as an antifouling coating agent or a waterproof coating agent.

18. The surface treatment agent according to any one of claims 1 to 17, which is for vacuum deposition.

19. A pellet containing the surface treatment agent according to any one of claims 1 to 18.

20. An article comprising a substrate and a layer formed on the surface of the substrate from the surface treatment agent according to any one of claims 1 to 18.

21. 21. The article of claim 20, which is an optical element.

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