阅读说明：本技术 蒸镀用含氟醚组合物、以及带蒸镀膜的物品及其制造方法 (Fluorine-containing ether composition for vapor deposition, article with vapor deposition film, and method for producing same ) 是由 石关健二 平社英之 于 2018-05-29 设计创作，主要内容包括：本发明提供能够形成摩擦耐久性优良的蒸镀膜的蒸镀用含氟醚组合物、以及带蒸镀膜的物品及其制造方法。蒸镀用含氟醚组合物包含具有聚(氧基全氟亚烷基)链和水解性甲硅烷基的化合物(A)、以及上述化合物(A)的部分缩合物(B),上述部分缩合物(B)相对于上述化合物(A)和上述部分缩合物(B)的合计量的比例为4～40质量％。(The invention provides a fluorine-containing ether composition for vapor deposition, which can form a vapor deposition film having excellent friction durability, and an article with a vapor deposition film and a method for producing the same. The fluorine-containing ether composition for vapor deposition comprises a compound (A) having a poly (oxyperfluoroalkylene) chain and a hydrolyzable silyl group, and a partial condensate (B) of the compound (A), wherein the proportion of the partial condensate (B) to the total amount of the compound (A) and the partial condensate (B) is 4 to 40% by mass.)

1. A fluorine-containing ether composition for vapor deposition, characterized in that,

comprising a compound (A) having a poly (oxyperfluoroalkylene) chain and B groups represented by the following formula (I) wherein B is an integer of 1 or more,

the proportion of the partial condensate (B) to the total amount of the compound (A) and the partial condensate (B) is 4 to 40% by mass,

-SiR_nL_3-n……(I)

wherein L is a hydroxyl group or a hydrolyzable group,

r is a hydrogen atom or a 1-valent hydrocarbon group,

when b is an integer of 2 or more, n is an integer of 0 to 2, and when b is 1, n is 0 or 1,

when n is 0 or 1, (3-n) L's may be the same or different,

when n is 2, n R's may be the same or different.

2. The composition according to claim 1, wherein the compound (a) has a number average molecular weight of 2000 to 10000.

3. The composition according to claim 1 or 2, wherein the number average molecular weight of the partial condensate (B) is 4000 to 30000.

4. The composition according to any one of claims 1 to 3, wherein the partial condensate (B) is a partial hydrolytic condensate of a compound (A) in which L is a hydrolyzable group.

5. The composition according to any one of claims 1 to 4, wherein the compound (A) is a compound represented by the following formula (A1),

[R^f1-O-Q-R^fα-]_aZ¹[-SiR_nL_3-n]_b……(A1)

wherein L, R, n and b have the same meanings as defined above,

R^f1is a perfluoroalkyl group,

q is a single bond, an oxyfluoroalkylene group containing 1 or more hydrogen atoms, or a polyoxyfluoroalkylene group in which 2 to 5 of the oxyfluoroalkylene groups are bonded, and the oxyfluoroalkylene groups constituting the group may be the same or different,

R^fαis said poly (oxyperfluoroalkylene) chain,

Z¹is a (a + b) -valent linking group,

a is an integer of 1 or more,

when a is 2 or more, a is [ R ]^f1-O-Q-R^fα-]Which may be the same or different from each other,

when b is 2 or more, b [ -SiR ]_nL_3-n]May be the same or different.

6. The composition of any one of claims 1 to 5, wherein b is 2 or 3.

7. A coating liquid comprising the composition according to any one of claims 1 to 6 and a liquid medium.

8. An article with a vapor-deposited film, comprising the composition according to any one of claims 1 to 6.

9. A method for producing an article with a vapor-deposited film, characterized by vapor-depositing the composition according to any one of claims 1 to 6 on a substrate.

10. The method according to claim 9, wherein the temperature is 20 to 300 ℃ and the pressure is 1X 10^-1The vapor deposition is performed under a condition of Pa or less.

Technical Field

The present invention relates to a fluorine-containing ether composition for vapor deposition, an article with a vapor deposition film, and a method for producing the same.

Background

Fluorine-containing compounds are used for surface treatment agents and the like because of their high lubricity, water and oil repellency, and the like. For example, if a surface treatment agent is applied to the surface of a substrate to form a surface layer, the surface treatment agent can impart lubricity, water and oil repellency, and the like, and can easily wipe off stains on the surface of the substrate, thereby improving stain removability. Among the fluorine-containing compounds, a fluorine-containing ether compound having a poly (oxyperfluoroalkylene) chain in which an ether bond (-O-) is present in the middle of a perfluoroalkyl chain is excellent in removing properties of stains such as fats and oils.

Such a fluorine-containing ether compound has a performance (fingerprint stain removability) of easily removing a fingerprint adhering to the surface by wiping, and is therefore used, for example, as a surface treatment agent for a member constituting a surface of a touch panel to be touched with a finger.

In order to provide a layer containing a fluorinated ether compound on the surface of a substrate such as glass or metal, a compound in which a hydrolyzable silyl group is introduced into the terminal of a fluorinated ether compound has been proposed. In the surface layer formed of the fluorine-containing ether compound having a hydrolyzable silyl group, a silanol group formed by decomposition of the hydrolyzable silyl group can be bonded to the surface of glass, metal, or the like.

The fluorine-containing ether compound having a hydrolyzable silyl group may be partly converted into a polymer due to the influence of moisture contained in a liquid medium. Conventionally, from the viewpoint of storage stability of a coating liquid, etc., a polymer is considered to be undesirable, and for example, patent document 1 describes a method of preventing the polymer from being converted into a polymer by reducing the moisture content of a liquid medium.

Disclosure of Invention

Technical problem to be solved by the invention

As a method for forming the surface layer, there are a wet coating method and a dry coating method. A dry coating method which does not require a large amount of liquid medium unlike the wet coating method described in patent document 1 is desirable in terms of working environment and the like, and attracts attention.

In recent years, the requirements for friction durability have become more stringent, and even in the case of a vacuum vapor deposition method as an example of a dry coating method, further improvement in friction durability has been required.

The invention aims to provide a fluorine-containing ether composition for vapor deposition, which can form a vapor deposition film with excellent friction durability, an article with the vapor deposition film with excellent friction durability and a manufacturing method thereof.

Technical scheme for solving technical problem

The present invention provides a fluorine-containing ether composition for vapor deposition having the following configurations [1] to [10], an article with a vapor deposition film, and a method for producing the same.

[1] A fluorinated ether composition for vapor deposition, characterized by comprising a compound (A) having a poly (oxyperfluoroalkylene) chain and B groups represented by the following formula (I), wherein B is an integer of 1 or more, and a partial condensate (B) of the compound (A), wherein the proportion of the partial condensate (B) to the total amount of the compound (A) and the partial condensate (B) is 4 to 40% by mass,

-SiR_nL_3-n……(I)

wherein L is a hydroxyl group or a hydrolyzable group,

r is a hydrogen atom or a 1-valent hydrocarbon group,

when b is an integer of 2 or more, n is an integer of 0 to 2, and when b is 1, n is 0 or 1,

when n is 0 or 1, (3-n) L's may be the same or different,

when n is 2, n R's may be the same or different.

[2] The composition according to [1], wherein the number average molecular weight of the compound (A) is 2000 to 10000.

[3] The composition according to [1] or [2], wherein the number average molecular weight of the partial condensate (B) is 4000 to 30000.

[4] The composition according to any one of [1] to [3], wherein the partial condensate (B) is a partial hydrolytic condensate of a compound (A) wherein L is a hydrolyzable group.

[5] The composition according to any one of [1] to [4], wherein the compound (A) is a compound represented by the following formula (A1),

[R^f1-O-Q-R^fα-]_aZ¹[-SiR_nL_3-n]_b……(A1)

wherein L, R, n and b have the same meanings as defined above,

R^f1is a perfluoroalkyl group,

q is a single bond, an oxyfluoroalkylene group containing 1 or more hydrogen atoms, or a polyoxyfluoroalkylene group in which 2 to 5 of the oxyfluoroalkylene groups are bonded, and the oxyfluoroalkylene groups constituting the group may be the same or different,

R^fαis said poly (oxyperfluoroalkylene) chain,

Z¹is a (a + b) -valent linking group,

a is an integer of 1 or more,

when a is 2 or more, a is [ R ]^f1-O-Q-R^fα-]Which may be the same or different from each other,

when b is 2 or more, b [ -SiR ]_nL_3-n]May be the same or different.

[6] The composition according to any one of [1] to [5], wherein b is 2 or 3.

[7] A coating liquid comprising the composition according to any one of the above [1] to [6] and a liquid medium.

[8] An article with a vapor-deposited film, comprising the vapor-deposited film formed from the composition according to any one of the above items [1] to [6 ].

[9] A method for producing an article with a vapor-deposited film, characterized by vapor-depositing the composition according to any one of the above items [1] to [6] on a substrate.

[10]Such as [9]]The production method described above, wherein the temperature is 20 to 300 ℃ and the pressure is 1X 10^-1The vapor deposition is performed under a condition of Pa or less.

Effects of the invention

According to the fluorine-containing ether composition for vapor deposition of the present invention, a vapor deposition film having excellent friction durability can be formed. Further, according to the article with a vapor deposited film and the method for producing the same of the present invention, an article having a vapor deposited film excellent in friction durability can be provided.

Drawings

FIG. 1 is a chromatogram of the gel permeation chromatography obtained in example 1 of the example.

Detailed Description

In the present specification, a compound represented by formula (a1) is referred to as compound (a 1). The same applies to compounds represented by other formulae. In addition, the group represented by the formula (I) is referred to as group (I). Groups represented by other formulae are also described in the same manner.

The following terms in the present specification have the following meanings.

"hydrolyzable silyl group" refers to a group capable of forming a silanol group (Si-OH) by a hydrolysis reaction.

The chemical formula of oxyperfluoroalkylene is shown in such a manner that the oxygen atom is located on the right side of the perfluoroalkylene group.

"etheric oxygen atom" means an oxygen atom forming an ether bond (-O-) between carbon atoms.

[ fluoroether composition ]

The fluorine-containing ether composition of the present invention (hereinafter also referred to as the present composition) comprises a compound (a) and a partial condensate thereof (B).

It is considered that a part of the hydroxyl groups of the compound (a) in which L is a hydroxyl group is condensed by a dehydration reaction to become a partial condensate (B). It is considered that a part of the hydrolyzable group of the compound (a) in which L is a hydrolyzable group is converted into a hydroxyl group by hydrolysis, and the generated hydroxyl group undergoes dehydration reaction, thereby being condensed to become a partial condensate (B).

(Compound (A))

The compound (a) has a poly (oxyperfluoroalkylene) chain (hereinafter, the poly (oxyperfluoroalkylene) chain in the compound (a) is also referred to as a chain α), and b groups (I) (wherein b is an integer of 1 or more).

-SiR_nL_3-n……(I)

Wherein L is a hydroxyl group or a hydrolyzable group,

r is a hydrogen atom or a 1-valent hydrocarbon group,

when b is an integer of 2 or more, n is an integer of 0 to 2, and when b is 1, n is 0 or 1,

when n is 0 or 1, (3-n) L's may be the same or different,

when n is 2, n R's may be the same or different.

The number of the chain α of the compound (a) may be 1, or 2 or more. From the viewpoint of excellent friction durability and lubricity, 1 to 3 are preferable.

When the compound (A) has 2 or more chains α, the chains α may be the same or different.

The number b of the groups (I) of the compound (a) may be 1, or 2 or more. When b is 1, n is 0 or 1. Thereby, the compound (a) may have 2 or more groups (groups L) represented by the above L per 1 molecule.

The number b of the groups (I) of the compound (a) is preferably 1 to 6, more preferably 1 to 4, and particularly preferably 2 to 3, from the viewpoint of further improving the friction durability of a film (hereinafter also referred to as a vapor deposited film) formed on the surface of the base material by a vacuum deposition method.

When the compound (A) has 2 or more groups (I), each group (I) may be the same or different. From the viewpoint of ease of production of the compound (A), all the groups are preferably the same.

The chain alpha is preferably bound at one end with a group (II). That is, the compound (a) preferably further has a group (II) bonded to one terminal of the chain α. Thereby, the deposited film becomes excellent in lubricity.

R^f1-O-Q-……(II)

Wherein R is^f1Is a perfluoroalkyl group, Q is a single bond, an oxyfluoroalkylene group having 2 to 10 carbon atoms and containing 1 or more hydrogen atoms, or a polyoxyfluoroalkylene group formed by bonding 2 to 5 of the oxyfluoroalkylene groups. The oxyfluoroalkylene groups constituting the polyoxyfluoroalkylene group may be the same or different.

The number average molecular weight (Mn) of the compound (A) is preferably 2000 to 10000, more preferably 2500 to 8000, and particularly preferably 3000 to 6000. When the number average molecular weight of the compound (A) is not less than the lower limit of the above range, the deposited film has excellent lubricity. When the number average molecular weight of the compound (A) is not less than the lower limit of the above range, the vapor deposited film is more excellent in friction durability.

The number average molecular weight (Mn) can be measured by the measurement method described in the following examples.

< Poly (oxyperfluoroalkylene) chain >

The chain α may, for example, be a chain represented by the following formula (. alpha.1).

(R^f2O)_m1……(α1)

Wherein R is^f2Is a perfluoroalkylene group, and is,

m1 is an integer of 2 to 200,

(R^f2O)_m1may be composed of 2 or more kinds of R having different carbon numbers^f2A group consisting of O and a group consisting of,

R^f2the structure may be a linear structure or a branched structure, and a linear structure is preferable in terms of more excellent lubricity of the deposited film.

R^f2The carbon number of (b) is preferably 1 to 6, more preferably 2 to 6, further preferably 2 to 4, from the viewpoint of more excellent friction durability and lubricity of the evaporated film, and particularly preferably 2 from the viewpoint of more excellent lubricity of the evaporated film.

m1 is preferably an integer of 5 to 150, particularly preferably an integer of 1 to 100. When m1 is not less than the lower limit of the above range, the deposited film has excellent lubricity. When m1 is not more than the upper limit of the above range, the vapor deposited film has excellent friction durability. That is, if the number average molecular weight of the compound (a) is too large, the number of groups (I) present per unit molecular weight decreases, and the friction durability decreases.

At least 2 kinds of R having different carbon numbers in the chain alpha^f2In the case of the O structure, the order of bonding is not limited. The oxyperfluoroalkylene groups may be arranged in a random, alternating or block configuration.

Specific examples of the chain (. alpha.1) include the following (. alpha.1-1) to (. alpha.1-8). In the following formulae, { } represents that the 2 oxyperfluoroalkylene groups described therein are randomly arranged in m11 and m12, respectively.

(CF₂O)_m01……(α1-1)

{(CF₂O)_m11(CF₂CF₂O)_m12}……(α1-2)

{(CF₂O)_m11(CF₂CF₂CF₂O)_m12}……(α1-3)

{(CF₂O)_m11(CF₂CF₂CF₂CF₂O)_m12}……(α1-4)

{(CF₂O)_m11(CF(CF₃)CF₂O)_m12}……(α1-5)

(CF₂CF₂O)_m13……(α1-6)

(CF₂CF₂CF₂O)_m14……(α1-7)

(CF₂CF₂O-CF₂CF₂CF₂CF₂O)_m15……(α1-8)

Wherein m01 is an integer of 2 to 200, m11 is an integer of 1 or more, m12 is an integer of 1 or more, and (m11+ m12) is an integer of 2 to 200.

m01 and (m11+ m12) are integers of 2 to 200, preferably 5 to 150, and particularly preferably 10 to 80.

The ratio of m11 to m12 (m11/m12) is preferably 99/1 to 30/70, and particularly preferably 90/10 to 40/60.

Further, m13 and m14 are integers of 2 to 200, respectively. m15 is an integer of 1 to 100, preferably an integer of 3 to 75, and particularly preferably an integer of 5 to 40.

Among the above chains, (α 1-2) to (α 1-4) and (α 1-8) are preferable, and (α 1-2) are particularly preferable.

In addition, in the above (alpha 1-2) - (alpha 1-5) and (alpha 1-8), it is also preferable to combine 1 to 4 (R) before or after the above formula^f2O). In this case, the above-mentioned total number of m11 and m12 is added to (R)^f2O) is 200 or less, m15 plus the (R)^f2O) is 200 or less.

As having the above (R)^f2Specific examples of the chain (. alpha.1) of O) include the following groups.

(CF₂CF₂O)₂{(CF₂O)_m11(CF₂CF₂O)_m12}

(CF₂CF₂O-CF₂CF₂CF₂CF₂O)_m15(CF₂CF₂O)

In the present composition, the compound (a) may be a single compound composed of 1 kind of the compound (a), or may be a mixture composed of 2 or more kinds of the compound (a).

In the present specification, a fluorine-containing ether compound of the same compound group except that the number of repeating numbers of oxyperfluoroalkylene groups in a poly (oxyperfluoroalkylene) chain has a distribution is regarded as a single compound.

For example, in the chain α is { (CF)₂O)_m11(CF₂CF₂O)_m12In the case of the compound (A), the same compound group except that m11 and m12 have distributions is regarded as a fluorine-containing ether compound as a single compound.

< group (I) >

In the group (I), L is a hydroxyl group or a hydrolyzable group.

The hydrolyzable group is a group that forms a hydroxyl group by a hydrolysis reaction. That is, when L is a hydrolyzable group, Si-L of the group (I) is changed to a silanol group (Si-OH) by a hydrolysis reaction.

Examples of the hydrolyzable group include an alkoxy group, a halogen atom, an acyl group, and an isocyanate group (-NCO). The number of carbon atoms of the alkoxy group is preferably 1 to 4. As the halogen atom, a chlorine atom is particularly preferable.

The hydrolyzable group is preferable as L in view of storage stability of the compound (a) itself, storage stability of the compound (B) itself, easiness of adjustment of a reaction for producing the compound (B) from the compound (a) (for example, adjustment of a ratio of converting the compound (a) into the compound (B) or a degree of condensation of the compound (B)).

L is preferably an alkoxy group having 1 to 4 carbon atoms or a halogen atom, from the viewpoint of further facilitating the production of the compound (A). From the viewpoint of less outgassing (Japanese: アウトガ ス) during vapor deposition and excellent storage stability of the compound (A), alkoxy groups having 1 to 4 carbon atoms are preferred, ethoxy groups are particularly preferred when long-term storage stability of the compound (A) is required, and methoxy groups are particularly preferred when the reaction time after vapor deposition is short.

R is a hydrogen atom or a 1-valent hydrocarbon group.

The 1-valent hydrocarbon group may, for example, be a saturated hydrocarbon group such as an alkyl group or a cycloalkyl group, an alkenyl group or an allyl group, and a saturated hydrocarbon group is preferred.

The number of carbon atoms of the 1-valent saturated hydrocarbon group is preferably 1 to 6, more preferably 1 to 3, and particularly preferably 1 to 2, from the viewpoint of ease of production of the compound (A).

n is preferably 0 or 1, particularly preferably 0. When a plurality of L groups are present in 1 group (I), the adhesion to the base material becomes stronger, and the friction durability of the vapor deposited film becomes more excellent.

When n is 0 or 1, (3-n) L's may be the same or different, and for example, a part of L's may be a hydrolyzable group and the rest may be a hydroxyl group.

As the group (I), Si (OCH) is preferred₃)₃、SiCH₃(OCH₃)₂、Si(OCH₂CH₃)₃、SiCl₃、Si(OCOCH₃)₃、Si(NCO)₃. Si (OCH) is particularly preferable from the viewpoint of ease of handling in industrial production₃)₃。

< group (II) >

In the group (II), R^f1Is a perfluoroalkyl group.

R is more excellent in lubricity and friction durability of the deposited film^f1The number of carbon atoms of the perfluoroalkyl group in (1) is preferably 1 to 20, more preferably 1 to 10, still more preferably 1 to 6, and particularly preferably 1 to 3.

The perfluoroalkyl group may be branched or linear, and is preferably linear. Examples of the linear perfluoroalkyl group include CF₃-、CF₃CF₂-、CF₃CF₂CF₂-and the like.

Q is a single bond, an oxyfluoroalkylene group having 2 to 10 carbon atoms and containing 1 or more hydrogen atoms, or a polyoxyfluoroalkylene group in which 2 to 5 (preferably 2 to 4) of the oxyfluoroalkylene groups are bonded. In the polyoxyfluoroalkylene group, a plurality of the oxyfluoroalkylene groups are usually bonded in series.

The solubility of the compound (A) in a liquid medium is improved by using Q as an oxyfluoroalkylene group containing a hydrogen atom or a polyoxyfluoroalkylene group in which 2 to 5 of the oxyfluoroalkylene groups are bonded.

The carbon number of the oxyfluoroalkylene group is preferably 2 to 6, more preferably 2 to 4, and particularly preferably 2 or 3.

The number of hydrogen atoms in the oxyfluoroalkylene group is 1 or more, preferably 2 or more, and particularly preferably 3 or more, from the viewpoint of excellent appearance of the deposited film. The number of hydrogen atoms in the oxyfluoroalkylene group is preferably not more than (the number of carbon atoms of Q) × 2, and particularly preferably not more than (the number of carbon atoms of Q), from the viewpoint of further improving the water and oil repellency of the vapor deposition layer.

The oxyfluoroalkylene group may be branched or linear, and is preferably linear in view of more excellent lubricity of the deposited film.

In the polyoxyalkylene group, 2 to 5 oxyalkylene groups may be the same or different.

Q is preferably a single bond or a group selected from-CHFCF, from the viewpoint of easy production of the compound (A)₂OCH₂CF₂O-、-CF₂CHFCF₂OCH₂CF₂O-、-CF₂CF₂CHFCF₂OCH₂CF₂O-、-CF₂CF₂OCHFCF₂OCH₂CF₂O-、-CF₂CF₂OCF₂CF₂OCHFCF₂OCH₂CF₂O-、-CF₂CH₂OCH₂CF₂O-, and-CF₂CF₂OCF₂CH₂OCH₂CF₂Radical of O- (wherein the left side is bound to R)^f1-O binding).

The compound (a) is not particularly limited as long as it has the chain α and the group (I). For example, the fluorine-containing ether compound can be appropriately selected from known fluorine-containing ether compounds described in the following documents.

Japanese patent laid-open Nos. 2013-91047, 2014-80473, 2013/042732, 2013/042733, 2013/121984, 2013/121985, 2013/121986, 2014/163004, 2014/175124, 2015/087902, 2013-227279, 2013-241569, 2013-256643, 2014-15609, 2014-37548, 2014-88654, 2014-2109, 2015-210258, 2014-218639, 200200889, Japanese patent laid-open Nos. 2015-221888, 2013/146112, 2013/187432, 2014/069592, 2015/099085, 2015/166760, 2013-144726, 2014-77836, 2013-117012, 2014-214194, 2014-198822, 2015-129230, 2015-196723, 2015-13983, 915 and 2015-1992015-199906.

< Compound (A1) >

As the compound (A), preferred are the fluorine-containing ether compounds described in International publication Nos. 2014/163004 and 2013/121984 and Japanese patent laid-open publication No. 2015-199906, and the following compound (A1).

[R^f1-O-Q-R^fα-]_aZ¹[-SiR_nL_3-n]_b……(A1)

Wherein R is^f1Q, L, R, n and b each have the same definitions as above,

R^fαis a chain of a-alpha,

Z¹is a (a + b) -valent linking group,

a is an integer of 1 or more,

when a is 2 or more, a is [ R ]^f1-O-Q-R^fα-]Which may be the same or different from each other,

when b is 2 or more, b [ -SiR ]_nL_3-n]May be the same or different.

R^f1With R in the above-mentioned group (II)^f1Similarly, the preferred embodiments are also the same.

When a is 2 or more, a is R^f1The carbon number of (b) is preferably the same, and from the viewpoint of easy production, the same group, that is, the same group having the same carbon number and the same chemical structure is preferable. Groups having the same number of carbons and the same chemical structure mean, for example, when a is 2, 2R^f1Is CF₃CF₂CF₂- (other than 2R^f1CF having the same carbon number but different chemical structure₃CF₂CF₂-、CF₃CF(CF₃) -a combination of (a) and (b).

Q is the same as Q in the above-mentioned group (II), and the preferred form is the same.

R^fαThe chain alpha of (A) is the same as above, preferred forms areThe state is also the same.

L is the same as L in the above-mentioned group (I), and the preferable form is also the same.

R is the same as R in the above-mentioned group (I), and the preferable form is also the same.

n is the same as n in the above group (I), and the preferred form is the same.

Preferred values of a are the same as the preferred values of the chain α of the compound (A). That is, a is preferably an integer of 1 to 3.

Preferred values of b are the same as those of the group (I) possessed by the compound (A). That is, b is preferably an integer of 1 to 10, more preferably an integer of 2 to 5, and particularly preferably an integer of 3 to 4.

As Z¹Examples thereof may include a substituted or unsubstituted hydrocarbon group having a valence of (a + b), a group having a valence of (a + b) having a group or atom other than the hydrocarbon group at a carbon-carbon atom position or/and a terminal of the substituted or unsubstituted hydrocarbon group, and an organopolysiloxane group having a valence of (a + b).

Examples of the unsubstituted hydrocarbon group include a straight-chain or branched-chain saturated hydrocarbon group, an aromatic hydrocarbon ring group (for example, a group obtained by removing (a + b) hydrogen atoms from an aromatic hydrocarbon ring such as a benzene ring or a naphthalene ring), a group composed of a combination of a straight-chain or branched-chain saturated hydrocarbon group and an aromatic hydrocarbon ring group (for example, a group obtained by bonding an alkyl group as a substituent to the aromatic hydrocarbon ring group, a group having an arylene group such as a phenylene group at a carbon atom or/and a terminal of the saturated hydrocarbon group, and the like), a group composed of a combination of 2 or more aromatic hydrocarbon ring groups, and the like. Among them, linear or branched saturated hydrocarbon groups are preferable. The carbon number of the unsubstituted hydrocarbon group is preferably 20 or less.

The substituted hydrocarbon group is a group in which a part or all of the hydrogen atoms of the hydrocarbon group are substituted with a substituent. Examples of the substituent include a halogen atom such as a hydroxyl group, a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, an amino group, a nitro group, a cyano group and an aminocarbonyl group.

Examples of the group or atom other than the hydrocarbon group which may be contained at the carbon-carbon atom of the hydrocarbon group or/and the terminal thereof may include an etheric oxygen atom (-O-), a thioether sulfur atom (-S-), and nitrogenAtom (-N <), silicon atom (> Si <), carbon atom (> C <), -N (R)¹⁵)-、-C(O)N(R¹⁵)-、-OC(O)N(R¹⁵)-、-Si(R¹⁶)(R¹⁷) -, organopolysiloxane, -C (O) -, -C (O) -O-, -C (O) -S-, and the like. Wherein R is¹⁵Is a hydrogen atom, an alkyl group or a phenyl group, R¹⁶～R¹⁷Each independently is alkyl or phenyl. The number of carbon atoms in the alkyl group is preferably 1 to 6.

The organopolysiloxane group may be linear, branched, or cyclic.

< preferred embodiment of Compound (A1) >

As the compound (a1), at least 1 selected from the group consisting of the compound (a11), the compound (a12) and the compound (a13) is preferable from the viewpoint that the friction durability and fingerprint stain removal property of the vapor deposited film are more excellent.

[ Compound (A11) ]

Compound (a11) is represented by the following formula (a 11).

R^f1-O-Q-R^fα-Q³²-[C(O)N(R³³)]_p1-R³⁴-C[-R³⁵-SiR_n1L_3-n1]₃……(A11)

Wherein R is^f1、Q、R^fαR and L each have the same meanings as defined above,

Q³²is a C1-20 fluoroalkylene group or a group having an etheric oxygen atom between carbon-carbon atoms of a C2-20 fluoroalkylene group (wherein one end is bonded to the etheric oxygen atom and the other end is bonded to R)^fαExcept where the bonded fluoroalkylene group is perfluoroalkylene),

R³³is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,

p1 is either 0 or 1,

n1 is an integer of 0 to 2,

R³⁴is a single bond, an alkylene group having 1 to 6 carbon atoms, and a group bonded to the terminal of the alkylene group³⁵-SiR_n1L_3-n1]₃Terminal of bonding side) group having etheric oxygen atom, and etheric oxygen atom between carbon-carbon atoms of alkylene group having 2 to 6 carbon atomsOr at the end of an alkylene group having 2 to 6 carbon atoms (with C [ -R ]³⁵-SiR_n1L_3-n1]₃Terminal of bonding side) and a carbon-carbon atom has an etheric oxygen atom,

R³⁵is an alkylene group having 1 to 6 carbon atoms, a group having an etheric oxygen atom at the terminal of the alkylene group (excluding the terminal bonded to Si), or a group having an etheric oxygen atom between carbon-carbon atoms of an alkylene group having 2 to 6 carbon atoms,

3 [ -R ]³⁵-SiR_n1L_3-n1]May be the same or different.

Q³²Among them, the C1-20 fluoroalkylene group is preferably a perfluoroalkylene group or a fluoroalkylene group containing 1 or more hydrogen atoms. The fluoroalkylene group is preferably linear in view of the friction resistance and lubricity of the surface layer.

Examples of the group having an etheric oxygen atom between carbon atoms of the fluoroalkylene group having 2 to 20 carbon atoms include the following group (ii).

As Q³²Preferably, the fluorine-containing alkylene group has 1 to 20 carbon atoms and contains 1 or more hydrogen atoms, or the group has etheric oxygen atoms between carbon-carbon atoms of the fluorine-containing alkylene group having 2 to 20 carbon atoms and contains 1 or more hydrogen atoms.

Preferably R^fαContains more than 4 (CF)₂O), and Q)³²Of (CF)₂O) is 0 to 3.

0, R at p1^fαIs { (CF)₂O)_m11(CF₂CF₂O)_m12In the case of (b) }, Q³²Typically a C1 perfluoroalkylene group.

When p1 is 1, Q is³²The following groups may be mentioned.

(i) A perfluoroalkylene group.

(ii) At a position with R^fαThe binding side has R^FCH₂O (wherein, R^FA C1-C6 perfluoroalkylene group), with C (O) N (R)³³) The bonding side has a structure containing 1 or more hydrogen atomsA fluoroalkylene group (which may have an etheric oxygen atom between carbon and carbon atoms) of (a).

Q as (ii)³²From the viewpoint of easy production of the compound (a11), the following groups are preferred.

-R^FCH₂O-CF₂CHFOCF₂CF₂CF₂-、-R^FCH₂O-CF₂CHFCF₂OCF₂CF₂-、-R^FCH₂O-CF₂CHFCF₂OCF₂CF₂CF₂-、-R^FCH₂O-CF₂CHFOCF₂CF₂CF₂OCF₂CF₂-。

According to Q³²The linear compound (a11) can form a vapor deposited film having excellent friction durability and lubricity.

In [ C (O) N (R)³³)]_p1When p1 in the group is 0 or 1, the properties of the fluorine-containing ether compound hardly change. When p1 is 1, it has an amide bond, but since it is at Q³²And [ C (O) N (R) ]³³)]Since at least 1 fluorine atom is bonded to the terminal carbon atom on the bonding side, the polarity of the amide bond is reduced, and the water and oil repellency of the deposited film is less likely to be lowered. P1 can be selected to be 1 or 0 from the viewpoint of ease of manufacture.

As [ C (O) N (R)³³)]_p1In the radical R³³From the viewpoint of ease of production of the compound (a11), a hydrogen atom is preferred.

At R³³When the alkyl group is used, the alkyl group is preferably an alkyl group having 1 to 4 carbon atoms.

When p1 is 0, as R³⁴From the viewpoint of easy production of the compound (A11), it is preferably selected from the group consisting of a single bond, -CH₂O-、-CH₂OCH₂-、-CH₂OCH₂CH₂O-and-CH₂OCH₂CH₂OCH₂Group of (wherein, left side is Q)³²Combined).

When p1 is 1, as R³⁴From the viewpoint of easy production of the compound (A11), it is preferably selected from the group consisting of a single bond, -CH₂-and-CH₂CH₂-a group of (a).

As R³⁵From the viewpoint of easy production of the compound (A11), it is preferably selected from-CH₂CH₂-、-CH₂CH₂CH₂-、-CH₂OCH₂CH₂CH₂-、-OCH₂CH₂CH₂Group of (wherein the right side is bonded to Si).

As R³⁵In particular, a group having no etheric oxygen atom is preferable from the viewpoint of excellent light resistance of the vapor deposited film. Touch panels used outdoors (electronic labels such as vending machines and indicator boards), touch panels mounted on vehicles, and the like are required to have light resistance against water-and oil-repellent layers.

3 Rs in Compound (A11)³⁵May be the same or different.

Examples of the compound (a11) may include compounds of the formula. This compound is preferable from the viewpoint of easy industrial production, easy handling, and further excellent water/oil repellency of the vapor deposited film, friction durability, fingerprint stain removability, lubricity, and appearance.

[ solution 1]

Wherein W in these formulae is R^f1-O-Q-R^fα-. The preferred form of W is represented by the above preferred R^f1Q and R^fαThe combination of the two components. Q³²The preferred ranges of (A) and (B) are as described above.

[ Compound (A12) ]

Compound (a12) is represented by the following formula (a 12).

R^f1-O-Q-R^fα-R⁴²-R⁴³-N[-R⁴⁴-SiR_n2L_3-n2]₂……(A12)

Wherein R is^f1、Q、R^fαR and L each have the same meanings as defined above,

n2 is an integer of 0 to 2,

R⁴²is a C1-C6 perfluoroalkylene group,

R⁴³a single bond, an alkylene group having 1 to 6 carbon atoms, a group having an etheric oxygen atom or-NH-at the terminal of the alkylene group (excluding the terminal at the side bonded to N), a group having an etheric oxygen atom or-NH-between the carbon-carbon atoms of the alkylene group having 2 to 6 carbon atoms, or a group having an etheric oxygen atom or-NH-between the terminal of the alkylene group having 2 to 6 carbon atoms (excluding the terminal at the side bonded to N) and the carbon-carbon atom,

R⁴⁴is a C1-C6 alkylene group, or a group having an etheric oxygen atom or-NH-between carbon-carbon atoms of a C2-C6 alkylene group,

2 [ -R ]⁴⁴-SiR_n2L_3-n2]May be the same or different.

R⁴²Preferably a linear perfluoroalkylene group. If R is⁴²The linear perfluoroalkylene group provides the vapor deposited film with more excellent frictional durability and lubricity.

At R^fαIs { (CF)₂O)_m11(CF₂CF₂O)_m12In the case of (b) }, R⁴²Typically a C1 perfluoroalkylene group.

As R⁴³From the viewpoint of easy production of the compound (A12), it is preferably selected from-CH₂-、-CH₂CH₂-、-CH₂CH₂CH₂-、-CH₂OCH₂CH₂-and-CH₂NHCH₂CH₂Group of (wherein, left side is R)⁴²Combined).

R⁴³Since the film does not have an ester bond having high polarity and insufficient chemical resistance and light resistance, the film has excellent initial water repellency, chemical resistance and light resistance.

As R⁴⁴From the viewpoint of ease of production of the compound (A12), -CH is preferred₂CH₂CH₂-or-CH₂CH₂OCH₂CH₂CH₂- (where the right side is bonded to Si).

R⁴⁴Has no high polarityAnd chemical resistance and light resistance are insufficient, and therefore the initial water repellency, chemical resistance and light resistance of the vapor deposited film are excellent.

As R⁴⁴In particular, a group having no etheric oxygen atom is preferable from the viewpoint of excellent light resistance of the vapor deposited film.

2R in Compound (A12)⁴⁴May be the same or different.

Examples of the compound (a12) may include compounds of the formula. The compound is preferable from the viewpoint of being industrially easy to produce, easy to handle, water-and oil-repellent, friction durability, fingerprint stain removability, lubricity, chemical resistance and light resistance.

[ solution 2]

Wherein W in these formulae is R^f1-O-Q-R^fα-. The preferred form of W is represented by the above preferred R^f1Q and R^fαThe combination of the two components. R⁴²The preferred ranges of (A) and (B) are as described above.

[ Compound (A13) ]

Compound (a13) is represented by the following formula (a 13).

[R^f1-O-Q-R^fα-R⁵¹-R⁵²-O-]_eZ³[-O-R⁵³-SiR_nL_3-n]_f……(A13)

Wherein R is^f1、Q、R^fαR, L and n each have the same definitions as above,

R⁵¹is a C1-C6 perfluoroalkylene group,

R⁵²is an alkylene group having 1 to 6 carbon atoms,

Z³is a (e + f) -valent hydrocarbon group, or a group having 2 or more carbon atoms and (e + f) valences, having 1 or more etheric oxygen atoms between carbon atoms and carbon atoms of the hydrocarbon group,

R⁵³is an alkylene group having 1 to 20 carbon atoms,

e is an integer of 1 or more,

f is an integer of 1 or more,

(e + f) is not less than 3,

f is 4 or more when e is 1, f is 1 or more when e is 2 or more,

when e is 2 or more, e is [ R ]^f1-O-Q-R^fα-R⁵¹-R⁵²-O-]Which may be the same or different from each other,

when f is 2 or more, f [ -O-R [ - ]⁵³-SiR_nL_3-n]May be the same or different.

In the presence of a catalyst such as R^fαIs { (CF)₂O)_m11(CF₂CF₂O)_m12In the case of (b) }, R⁵¹is-CF₂-。

R⁵¹Preferably straight chain. If it is R⁵¹The linear compound (a13) can form a vapor deposited film having excellent friction durability and lubricity.

As R⁵²From the viewpoint of ease of production of the compound (A13), the alkylene group having 1 to 4 carbon atoms is preferable, and-CH is particularly preferable₂-。

As R^f1-O-Q-R^fα-R⁵¹The group (R) is preferably a group (R) from the viewpoint of further improving the water-and oil-repellency, friction durability, fingerprint stain removability, lubricity and appearance of the deposited film and from the viewpoint of facilitating production of the compound (A13)^f-1) or a group (R)^f-2)。

R^f11O{(CF₂O)_m21(CF₂CF₂O)_m22}CF₂-(R^f-1)

R^f11OCHFCF₂OCH₂CF₂O{(CF₂O)_m21(CF₂CF₂O)_m22}CF₂-(R^f-2)

Wherein R is^f11Is a straight-chain perfluoroalkyl group having 1 to 20 carbon atoms; m21 and m22 are integers of 1 or more, m21+ m22 are integers of 2 to 200, and m21 CF₂O and m22 CF₂CF₂The order of bonding of O is not limited.

As Z³Examples thereof include residues obtained by removing hydroxyl groups from a polyol having (e + f) hydroxyl groups.

As Z³Specific examples of (3) include groups represented by the following formula. As Z³From the viewpoint of excellent reactivity of hydroxyl groups, the residue obtained by removing hydroxyl groups from a polyol having primary hydroxyl groups is preferred, and from the viewpoint of easy starting of raw materials, the group (Z-1), the group (Z-2) or the group (Z-3) is particularly preferred. Wherein R is⁴Is an alkyl group, preferably methyl or ethyl.

[ solution 3]

As R⁵³The alkylene group having 3 to 14 carbon atoms is preferable in terms of ease of production of the compound (A13). Further, in the hydrosilylation in the production of the compound (A13) described below, allyl (-CH) never readily forms₂CH＝CH₂) Is partially or fully isomerized to internal olefins (-CH ═ CHCH)₃) The alkylene group having 4 to 10 carbon atoms is particularly preferable from the viewpoint of the by-product obtained.

e is preferably 1 to 10, and particularly preferably 1 to 4. If the lower limit of the above range is not less than the above range, the vapor deposited film is excellent in water and oil repellency, frictional durability, fingerprint stain removability and lubricity. If e is not more than the upper limit of the above range, the appearance of the vapor deposited film is excellent.

The (e + f) is preferably 3 to 15, and particularly preferably 3 to 12.

When e is 1, b is 4 or more, preferably 4 to 10, and particularly preferably 4 to 5. When f is 4 or more when e is 1, the friction durability of the vapor deposited film is excellent. When f is not more than the upper limit of the above range, the appearance of the deposited film and the stability of the compound (A13) are excellent.

When e is an integer of 2 or more, f is an integer of 1 or more, preferably an integer of 1 to 10, and particularly preferably an integer of 1 to 4. If e is an integer of 2 or more, R in the vapor-deposited film^f1-O-Q-R^fα-R⁵¹-R⁵²High density of-O-groups, of evaporated filmThe coating composition has excellent lubricity and thus is less likely to exert a frictional force on the deposited film. Therefore, even if f is 1, the vapor deposited film has excellent friction durability. When f is not more than the upper limit of the above range, the appearance of the deposited film and the stability of the compound (A13) are excellent.

Examples of the compound (A13) may include compounds (1-1) to (1-6) of the following formulae. This compound is preferable from the viewpoint of easy industrial production, easy handling, and further excellent water/oil repellency of the vapor deposited film, friction durability, fingerprint stain removability, lubricity, and appearance.

[ solution 4]

Wherein W in these formulae is R^f1-O-Q-R^fα-. The preferred form of W is represented by the above preferred R^f1Q and R^fαThe combination of the two components. R⁵¹The preferred embodiment of (2) is as described above.

(partial condensate (B))

The partial condensate (B) is a partial condensate of the compound (a), that is, a polymer produced by a dehydration condensation reaction between hydroxyl groups produced by partial decomposition of the hydrolyzable group of the group (I) of the compound (a) or between hydroxyl groups of the group (I).

The number average molecular weight (Mn) of the partial condensate (B) is preferably 4000 to 30000, more preferably 5000 to 25000, and particularly preferably 6000 to 20000. If the number average molecular weight of the partial condensate (B) is not less than the lower limit of the above range, the friction durability is excellent. If the number average molecular weight of the partial condensate (B) is not more than the upper limit of the above range, the vapor pressure does not become too low.

The partial condensate (B) is preferably a condensate obtained by bonding 2 to 4 compounds (A), more preferably a condensate obtained by bonding 2 to 3 compounds (A). If the amount of the compound (a) to be bonded is not less than the lower limit of the above range, a layer of the partial condensate (B) can be formed on the layer of the compound (a) by vapor deposition, which is preferable. If the amount of the compound (a) bound is not more than the upper limit of the above range, the vapor pressure does not become too low.

Since the compound (a) has 1 or more groups L, and usually 2 or more groups L are present in the partial condensate (B). The partial condensate (B) preferably has 1 to 12 groups L per 1 molecule, more preferably 2 to 9 groups L.

The partial condensate (B) preferably has 1 or more groups L in all molecules.

When the number of groups L in the partial condensate (B) is not less than the lower limit of the above range, when a layer of the partial condensate (B) is formed on a layer of the compound (a) by vapor deposition, 2 layers are preferable because the adhesion is high. Further, when the number of the groups L in the partial condensate (B) is not more than the upper limit of the above range, the antifouling property is excellent.

(other fluorine-containing ether compound)

The present composition may be composed of the compound (a) and the partial condensate (B), and may contain a fluorine-containing ether compound other than the compound (a) and the partial condensate (B).

Examples of the other fluorine-containing ether compound include a fluorine-containing ether compound having a poly (oxyperfluoroalkylene) chain but not having the group (I) (hereinafter, also referred to as the compound (C)).

The compound (C) may, for example, be the compound (C1).

A³¹-O-Q⁵¹-(R^F3O)_m30-[Q⁵²-O]_p3-A³²……(C1)

Wherein A is³¹And A³²Independently represents a C1-20 perfluoroalkyl group, Q⁵¹Is a single bond, an oxyfluoroalkylene group having 2 to 10 carbon atoms and containing 1 or more hydrogen atoms, or a polyoxyfluoroalkylene group in which 2 to 5 (preferably 2 to 4) of the oxyfluoroalkylene group are bonded, Q⁵²Is a C1-10 fluoroalkylene group containing 1 or more hydrogen atoms or a C2-10 fluoroalkylene group containing 1 or more hydrogen atoms and having an etheric oxygen atom between carbon-carbon atoms (wherein the oxygen number is 10 or less), R^F3Is a C1-6 perfluoroalkylene group, m30 is an integer of 2-200, (R)^F3O)_m30Is composed of more than 2 kinds of R with different carbon numbers^F3A group consisting of O in Q⁵¹P3 is 0 when it is a single bond, in Q⁵¹And p3 is 1 when it is other than a single bond.

The compound (C1) can be produced by a known production method, or a commercially available product can be used.

For example, as Q⁵¹Examples of the compound (C1) having a single bond and p3 of 0 include FOMBLIN (registered trademark) M, FOMBLIN (registered trademark) Y, FOMBLIN (registered trademark) Z (see above, sovitsu ricksha (ソルベイソレクシ ス), Krytox (registered trademark) (manufactured by dupont), DEMNUM (registered trademark) (manufactured by da nji).

(composition of the present composition)

In the present composition, the proportion of the partial condensate (B) to the total amount of the compound (A) and the partial condensate (B) is 4 to 40% by mass. The proportion of the partial condensate (B) to the total amount of the compound (a) and the partial condensate (B) is preferably 5 to 35% by mass, and particularly preferably 20 to 32% by mass, from the viewpoint of obtaining a vapor deposited film having excellent friction durability.

In the present invention, the proportion of the partial condensate (B) to the total amount of the compound (a) and the partial condensate (B) is determined by a Gel Permeation Chromatography (GPC) method using peak fitting assuming a gaussian distribution. That is, the first peak is regarded as a peak based on the compound (a), and the second and subsequent peaks are regarded as values of [ (area of second peak)/(area of first peak + area of second peak) ] based on the peaks of the partial condensate (B).

In the present composition, the total amount of the compound (a) and the partial condensate (B) is preferably 10% by mass or more, and particularly preferably 20% by mass or more, based on the total mass of the present composition. The upper limit is not particularly limited, and may be 100 mass%.

The present compositions may also contain catalysts for hydrolysis and dehydration condensation. As the catalyst, any acid or base may be used. The acid catalyst may, for example, be acetic acid, formic acid or trifluoroacetic acid. The base catalyst may, for example, be ammonia or an organic amine.

The present composition may further contain impurities other than the compound (A), the partial condensate (B), other fluorine-containing ether compounds and the catalyst. Examples of the impurities other than the compound (a), the partial condensate (B) and the other fluorine-containing ether compound include compounds which are inevitable in the production of the compound (a), the partial condensate (B) and the other fluorine-containing ether compound.

The composition does not contain a liquid medium described later.

(method for producing the present composition)

The present composition can be produced by subjecting a part of the compound (a) in which L is a hydroxyl group to a condensation reaction, or can be produced by subjecting a part of the compound (a) in which L is a hydrolyzable group to a partial hydrolysis and condensation reaction.

The amount of water added may be adjusted to adjust the proportion of the partial condensate (B) to the total amount of the compound (a) and the partial condensate (B). When the amount of water added is increased, the proportion of the partial condensate (B) can be increased, and when the amount of water added is decreased, the proportion of the partial condensate (B) can be decreased.

The proportion of the partial condensate (B) to the total amount of the compound (a) and the partial condensate (B) can also be adjusted by mixing two compositions having different proportions of the partial condensate (B) at an appropriate mixing ratio. For example, the proportion of the partial condensate (B) can be adjusted by mixing a composition containing the compound (a) as a main component and a composition containing the partial condensate (B) as a main component.

[ coating solution ]

The coating liquid of the present invention (hereinafter also referred to as the present coating liquid) contains the present composition and a liquid medium. The coating liquid may be a solution or a dispersion.

In the coating liquid, the concentration of the composition is preferably 5 to 30% by mass, and particularly preferably 10 to 25% by mass.

As the liquid medium, an organic solvent is preferable. The organic solvent may be a fluorine-containing organic solvent, a non-fluorine-containing organic solvent, or both of them.

The fluorine-containing organic solvent may, for example, be a fluoroalkane, a fluoroaromatic compound, a fluoroalkyl ether, a fluoroalkyl amine or a fluoroalcohol.

The non-fluorine-containing organic solvent is preferably a compound composed of only hydrogen atoms and carbon atoms, or a compound composed of only hydrogen atoms, carbon atoms and oxygen atoms, and examples thereof include hydrocarbon organic solvents, alcohol organic solvents, ketone organic solvents, ether organic solvents, and ester organic solvents.

The content of the liquid medium in the coating liquid is preferably 70 to 95% by mass, and particularly preferably 75 to 90% by mass.

[ article ]

The article of the present invention has a vapor-deposited film formed from the present composition on the surface of a substrate.

(substrate)

The substrate in the present invention is not particularly limited as long as it is a substrate to which lubricity and water/oil repellency are required to be imparted. Examples of the material of the substrate include metal, resin, glass, sapphire, ceramic, stone, and a composite material thereof. The glass may also be chemically strengthened. SiO may also be formed on the surface of the substrate₂A base film such as a film.

The substrate is preferably a substrate for a touch panel or a substrate for a display, and particularly preferably a substrate for a touch panel. The substrate for touch panels has light-transmitting properties. "having light transmittance" means that the transmittance of visible light of the vertical incidence type is 25% or more as defined in JIS R3106: 1998(ISO 9050: 1990). As a material of the substrate for a touch panel, glass or a transparent resin is preferable.

(vapor deposition film)

The vapor deposited film of the present invention has a two-layer structure including a lower layer (substrate side) mainly composed of the compound (a) and an upper layer mainly composed of the partial condensate (B). In the vapor deposition, the compound (a) having a small molecular weight is evaporated and attached to the substrate.

The thickness of the entire vapor deposition film is preferably 1 to 20nm, and particularly preferably 3 to 15 nm. If the thickness of the deposited film is not less than the lower limit of the above range, the effect of the surface treatment can be easily obtained sufficiently. If the thickness of the deposited film is not more than the upper limit of the above range, the utilization efficiency is high. The thickness of the deposited film can be calculated from the vibration period of the interference pattern by obtaining the interference pattern of the reflected X-rays by an X-ray reflectance method using an X-ray diffractometer for thin film analysis (ATX-G, manufactured by RIGAKU corporation).

(method of manufacturing article)

The article of the present invention can be obtained by treating the surface of a substrate by a dry coating method using the present composition or the present coating liquid. The composition is suitable for forming a vapor deposition film having excellent adhesion by a dry coating method.

The present composition or the present coating liquid can be used as it is in a dry coating method. Alternatively, vapor deposition may be performed using a particulate material obtained by immersing the present composition in a porous metal body such as iron or steel.

The dry coating method may, for example, be vacuum deposition, CVD or sputtering. The vacuum deposition method is particularly preferable from the viewpoint of suppressing the decomposition of the compound (a) and the partial condensate (B) and the viewpoint of the simplicity of the apparatus.

Examples of the vacuum deposition method include a resistance heating method, a high-frequency heating method, an electron beam method, and an ion beam method.

The temperature during vacuum deposition is preferably 20 to 300 ℃, and particularly preferably 30 to 200 ℃.

The pressure during vacuum deposition is preferably 1X 10^-1Pa or less, particularly preferably 1X 10^-2Pa or less.

The time for vapor deposition from the start of heating to the completion of vapor deposition is preferably 30 to 500 seconds, and particularly preferably 50 to 300 seconds. When the vapor deposition time is not less than the lower limit of the above range, the compound (a) and the compound (B) are preferably vaporized in stages. If the deposition rate is not more than the upper limit of the above range, the compound (A) is less likely to be thermally decomposed.

When the composition is evaporated, the film thickness distribution of the evaporation per 1 second shows at least 2 peaks. This is because the compound (a) and the partial condensate (B) contained in the present composition have different molecular weights and exhibit different vapor pressures. The first peak among the peaks is mainly composed of the compound (A), and the second and subsequent peaks are mainly composed of the partial condensate (B).

< post-treatment >

In order to improve the friction durability of the vapor deposited film, an operation for promoting the reaction of the compound (a) and the partial condensate (B) with the base material may be performed as necessary. Examples of the operation include heating, humidification, and light irradiation.

For example, when the substrate on which the deposited film is formed is heated in an atmosphere containing moisture, the reaction such as hydrolysis of a hydrolyzable silyl group to a silanol group, reaction of a hydroxyl group or the like on the surface of the substrate with a silanol group, and formation of a siloxane bond by condensation reaction of a silanol group can be promoted.

After the surface treatment, a compound which is not chemically bonded to other compounds in the vapor deposited film and the substrate can be removed as necessary. Specific examples of the method include a method of rinsing the vapor deposited film with a solvent, and a method of wiping the vapor deposited film with a cloth impregnated with a solvent.

[ Effect ]

Since the present composition contains the compound (a) and the partial condensate (B) in a particular ratio, a vapor deposited film having excellent friction durability can be formed.

First, at the time of vapor deposition, the compound (a) which is first evaporated and forms a layer in contact with the substrate has a sufficient amount of the group L of the group (I). When the group L is a hydrolyzable group, a silanol group is formed by hydrolysis, and the silanol group is subjected to dehydration condensation with a hydroxyl group on the surface of the substrate to form a chemical bond. When the group L is a hydroxyl group, the silanol group is subjected to dehydration condensation with a hydroxyl group on the surface of the substrate to form a chemical bond. Therefore, the vapor deposited film can be firmly bonded to the substrate.

In the vapor deposition, the partial condensate (B) which evaporates thereafter and forms the outermost layer has a large molecular weight, and therefore a dense and hard layer can be formed. That is, the surface strength of the vapor deposited film can be improved. Since the group L derived from the compound (a) also remains in the partial condensate (B), the partial condensate (B) is chemically bonded to the group L of the compound (a) by dehydration condensation, and therefore, the layer formed from the compound (a) and the layer formed from the partial condensate (B) are also excellent in adhesion.

The vapor deposition film based on the composition has high surface strength and adhesion, and therefore, has excellent friction durability.