JP2506234B2 - Method for manufacturing translucent substrate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a translucent substrate, and more particularly, to a window of a vehicle or a building, a vehicle.
The present invention relates to a light-transmitting substrate such as a window , an optical lens, and a lens for spectacles which requires a water-repellent, oil-repellent and antifouling effect.

[0002]

2. Description of the Related Art Conventionally, in order to prevent contamination of a light-transmitting substrate such as glass, a method of making the surface as smooth as possible, a method of coating a protective film such as a fluorine-based film on the surface, and the like have been proposed. ing. Further, in order to prevent the surface of the light-transmitting substrate from being fogged, a method of coating a hydrophilic polymer, a method of installing a heater in the light-transmitting substrate or on the surface of the light-transmitting substrate, and the like are used.

[0003]

When the light-transmissive substrate is contaminated by water droplets, a heater is installed to provide an anti-fog effect. However, there is a problem that a power source for the heater is required, and that the heater buried or installed on the surface hinders the transparency of the translucent substrate. Also, for example, the method of applying a hydrophilic polymer or the like is relatively simple,
The effect is temporary, and there is a problem that the hydrophilic polymer is easily peeled off by rubbing the surface of the transparent substrate.

When the cause of contamination is other than water droplets, these methods are almost meaningless, and a method of applying a fluorine-based protective film on the surface of a light-transmitting substrate has been proposed. The adhesiveness between the flexible substrate and the fluorine-based protective film is weak and peels easily,
Further, there is a problem that the transparent substrate is clouded due to the opacity of the fluorine-based protective film itself, and other protective film materials have improved transparency and adhesiveness, but there is a problem that stain components cannot be easily wiped off. . Therefore, it is practical to make the surface of the light-transmitting substrate as smooth as possible, but there is a limit to smoothing the surface, and as a result, a light-transmitting substrate that has been actively subjected to stain prevention and water / oil repellency treatment There was a problem that there was not.

An object of the present invention is to provide a light-transmissive substrate having high water repellency and high antifouling effect, in which dirt does not adhere, or even if dirt adheres, it is easily removed.

[0006]

In order to solve the above-mentioned problems, the first method for producing a light-transmitting substrate according to the present invention has a surface- friendly method.
Water-permeable or treated to contain hydrophilic groups
A non-aqueous organic solvent in which a silane-based surfactant having a reactive silyl group at one end and a fluorocarbon group at the other end is dissolved on at least one surface of a light-molded body (translucent substrate).
Bring the solution into contact with the hydrophilic group of the translucent substrate and the sila.
Dehydrochlorination reaction with the reactive silyl group of the surfactant
Has a fluorocarbon group and is water and oil repellent
Characterized by the chemisorption monomolecular film shape formed on the light-transparent substrate table surface.

Next, the production of the second transparent substrate of the present invention
The method includes hydrophilic groups on the surface or includes hydrophilic groups
Non-aqueous solvent in which a substance for an inner layer film containing a chlorosilyl group is mixed on at least one surface of a translucent substrate treated in this way
After contacting the solution , the substance containing the unreacted chlorosilyl group on the translucent substrate is removed by washing with a non-aqueous organic solvent, and then reacted with water to react with the substance containing the silanol group on the translucent substrate. To form a monolayer film for inner layer
Then, a non-aqueous organic solvent in which a silane-based surfactant having a reactive silyl group at one end and a fluorocarbon group at the other end is dissolved.
It is characterized in that a solution is brought into contact to accumulate a water- and oil-repellent chemisorption monomolecular adsorption film having a fluorocarbon group on the silanol group-containing monomolecular film.

[0008]In the second method, silanol
Between the formation of the chemisorption film and the accumulation of the chemisorption monolayer.
It is preferable to coat one surface with a water-soluble coating. Ma
In the first to second methods, the reactive silyl group
Is preferably a chlorosilyl group. Also the above
In the first to second methods, the silane-based surfactant is
CF ₃ − (CF ₂ ) _n -(R) _m -SiCl _p X
_3-p (N is 0 or an integer, m is 0 or 1, R is the number of carbon atoms
1 or more methylene group, vinylene-containing group having 1 or more carbon atoms
Methylene having 1 or more carbon atoms, such as a tylene group or an ethynylene group.
Group, methylene group having 1 or more carbon atoms of silicon-containing atom, or
Any of the methylene groups having 1 or more carbon atoms of the oxygen-containing atom, X is
Hydrogen atom, lower alkyl group or lower alkoxy group, p
Is preferably an integer of 0 to 2). The second
In the second method, a chlorosilyl group for the inner layer film is included.
The substance is SiCl _Four , SiHCl ₃ , SiH ₂ C
l ₂ , Cl- (SiCl ₂ O) _n -SiCl ₃ (N is an integer
It is preferably any of Also, the first and second
In the second method, the translucent substrate is made of resin.
Is preferred. In the first to second methods,
Is the surface of the translucent substrate in an oxygen or nitrogen atmosphere in advance.
By electron beam irradiation or ion beam irradiation
Therefore, it is preferable to add a hydrophilic group. Also the above
In the first to second methods, the hydrophilic group is a hydroxyl group,
Has active hydrogen selected from carbonyl and amino groups
Group is preferred. Also, the first to second
Method, a silane-based surfactant is applied to the surface of the translucent substrate.
After contacting the non-aqueous organic solvent in which the
It is preferable to remove by washing.

[0009]

According to the above-mentioned first and second manufacturing methods of the present invention.
In this case, the chemisorption monomolecular film formed on the surface of the substrate is extremely thin at a nanometer level, so that the original translucency of the substrate is not impaired. The first to second aspects of the present invention
Since the chemisorption monomolecular film obtained by the method of 1. has water repellency, it is possible to enhance the antifouling effect on the surface. Further, when a chemisorption monomolecular film having a water-repellent group is formed on one surface of the translucent substrate and a chemisorption monomolecular film containing a hydrophilic group is formed on the other surface of the translucent substrate, It is possible to provide a light-transmitting substrate having a water-repellent antifouling effect on one side and an antifogging effect on the other side.

[0010]

The EXAMPLES General of the translucent substrate material, glass or <br/> plastisol click is subjected. Substrate material comprises a hydrophilic group such as hydroxyl group to a the surface of the glass, also the substrate material can be a surface hydrophilic by performing simple oxidation treatment in plastisol click material. Therefore, when Ru is contacted in a non-aqueous organic solvent by dissolving a molecule comprising a carbon chain having a reactive silyl group at one end, with the active hydrogen of the hydrophilic groups on the surface and the reactive silyl group is dehydrochlorination, including A monolayer is formed via silicon chemical bonds. Such reaction is called the chemisorption reaction, thus the monomolecular film obtained by chemisorption intends monomolecular film and words. Since the chemisorption monomolecular film has a strong chemical bond with the surface of the substrate, the chemisorption monolayer generally has an adhesive strength that does not cause peeling unless the surface of the translucent substrate is scraped off. When a water-repellent group is contained at the other end of this molecule, the water-repellent property can exert an antifouling effect .

The translucent substrate material of the present invention is as described above.
To, for example, an acrylic resin, a plastic such as polycarbonate resin Ru is preferably provided. It is necessary that a hydrophilic group is exposed on the surface of the transparent substrate of the present invention, and examples of the hydrophilic group include groups having active hydrogen such as a hydroxyl group, a carbonyl group and an amino group. When there are few hydrophilic groups on the surface of the light-transmitting substrate material, the material is rendered hydrophilic by a usual method such as electron beam irradiation in an oxygen or nitrogen atmosphere, ion beam irradiation, or the like.

[0012] as a molecular chemisorption monomolecular film is subjected to the present invention, one end Kuroroshi Lil (-SiCl _n X
_3-n) groups, or alkoxysilane Lil (-Si (OA) _n X
Examples thereof include a silane-based surfactant containing a _3-n ) group and a hydrocarbon group or a fluorine-substituted carbon at the other end. However, n in the formula is an integer of 1 to 3, X represents hydrogen, a lower alkyl group or a lower alkoxy group, and A represents a lower alkyl group. Of the above-mentioned silane-based surfactants, chlorosilane-based surfactants are preferable because they can perform a chemisorption reaction at room temperature and can reliably form a chemisorption monomolecular film. When trichloro silyl group Among the chlorosilane-based surface active agent (n ie in the formula 3) is preferable because through siloxane bonds even between the adsorbed molecules. The silane-based surfactant used in the present invention is preferably linear in order to improve the density of adsorbed molecules. Specifically _{CH 3 - (R) m -SiCl} n X
_{3-n, CF 3 - (} CF 2) p - (R) m -SiCl n X
Chlorosilane-based surfactants represented by _3-n are preferred. However, in the formula, p is 0 or an integer, m is 0 or 1, R is a methylene group having 1 or more carbon atoms, a methylene group having 1 or more carbon atoms in a vinylene-containing group, a methylene group having 1 or more carbon atoms in an ethynylene-containing group, Either a methylene group having 1 or more carbon atoms of a silicon atom or a methylene group having 1 or more carbon atoms of an oxygen-containing atom,
X is a hydrogen atom, a lower alkyl group or a lower alkoxy group, and n is an integer of 0-2. In addition of the following specifically
Examples include compound. (1) CH ₃ (CH ₂ ) ₉ SiCl ₃ (2) CH ₃ (CH ₂ ) ₁₅ SiCl ₃ (3) CH ₃ CH ₂ O (CH ₂ ) ₁₅ SiCl ₃ (4) CH ₃ (CH ₂ ) ₂ Si _{(CH 3) 2 (CH 2} ) 15 SiCl 3 (5) CF 3 (CF 2) 7 (CH 2) 2 SiCl 3 (6) CF 3 CH 2 O (CH 2) 15 SiCl 3 (7) CF 3 ( _{CH 2) 2 Si (CH 3} ) 2 (CH 2) 15 SiCl 3 (8) F (CF 2) 4 (CH 2) 2 Si (CH 3) 2 (CH 2) 9 SiCl 3 (9) CF 3 COO (CH ₂ ) ₁₅ SiCl ₃ (10) CF ₃ (CF ₂ ) ₅ (CH ₂ ) ₂ SiCl _{3 Further} , when the R group in the above formula contains a vinylene group or an ethynylene group, irradiation with a catalyst, light or high energy rays is possible. By polymerizing unsaturated bonds with, etc., bonds between the molecules occur and a stronger monolayer is formed. Preferred. In addition, it is particularly preferable to use fluorocarbon as the water-repellent group because the water-repellent effect is large and the oil-repellent effect can be exhibited.

The method of manufacturing the translucent substrate of the present invention includes:
A preformed, transparent substrate is generally provided. In particular, when a chlorosilane-based surfactant is used for the translucent substrate of the present invention, it is necessary to wash the chemisorption monolayer after contacting with water after forming the chemisorption monolayer.
If this washing step is not performed, the unreacted chlorosilane-based surfactant reacts with water and becomes cloudy.

Further, particularly when the chlorosilane-based surfactant is used in the present invention, it is necessary to dissolve it in a non-aqueous organic solvent because the reactivity of the surfactant with water is high, and such a solvent is used. Are, for example, n-hexadecane,
Toluene, xylene, dicyclohexyl, carbon tetrachloride,
Chloroform or the like may be used alone or as a mixture of two or more kinds.
In the case of silane type surfactants other than chlorosilane type,
Other than this, for example, methyl alcohol, ethyl alcohol, etc. can be applied. Furthermore, the chemisorption monomolecular film of the present invention is such that one surface of the translucent substrate is contacted with a substance containing a chlorosilyl group, and then a substance containing an unreacted chlorosilyl group is washed and reacted with water to transmit the translucent substance. If a method is used in which a monomolecular film having a silanol group is formed on the surface of the substrate and then a silane-based surfactant containing fluorocarbon is chemically adsorbed, even if the substrate has few hydrophilic groups exposed on the surface. A silane-based surfactant containing a water-repellent group can be chemically adsorbed at high density, which is preferable. Examples of the substance for the inner layer film having a chlorosilyl group include SiCl ₄ ,
SiHCl ₃ , SiH ₂ Cl ₂ , Cl- (SiCl ₂ O) _{n
-SiCl 3, H k (R 1} ) 3- k Si (R 2) n SiCl
_m (R ₃ ) _{3-m and the} like are preferable, and in general, it is preferable that the number of Cl—Si bonds is large because the silane-based surfactant can be chemically adsorbed at a high density. However, in the formula, n is an integer, and k and m are 1 to 3.
Is an integer, R ₁ and R ₃ are lower alkyl groups, R ₂ is a carbon number 1
The above is a methylene group. In particular, when SiCl ₄ is used as a substance containing a chlorosilyl group, since the molecule is small and the activity for hydroxylation is large, the effect of uniformly hydrophilizing the substrate surface is large and preferable. Further, the light-transmitting substrate of the present invention has a chemisorption monomolecular film containing a water-repellent group on only one surface, and a chemisorption monomolecular film having a hydrophilic group on the other surface. Substrates that exhibit different properties on both sides of the compliant substrate can also be provided. As this method, for example, a substance containing a chlorosilane group is chemically adsorbed on both surfaces of a transparent substrate to form a monomolecular film containing a chlorosilane group, and the silanol group is deposited on the surface by a method such as washing with water. Then, an aqueous solution of a water-soluble polymer material such as polyvinyl alcohol or pullulan is applied to the surface to be left as a hydrophilic monomolecular film, and then a chemisorption monomolecular film containing a water-repellent group is formed, Then, there is a method of removing the water-soluble polymer material by washing with water. The chemisorption monomolecular film of the present invention may be a monolayer film of a single layer or a monomolecular cumulative film, but in the case of a monomolecular cumulative film, it is required that chemical bonds are also formed in the cumulative layers.

Glass will be cited below as a light-transmitting substrate material relating to the present invention, and a windshield of an automobile will be taken up as a typical example and explained in order.

[0016]

Example 1 First, after cleaning the finished windshield working in an organic _{solvent, CF 3 (CH 2) 7} (CH 2) 2 SiCl 3 as a material containing a fluorocarbon group and a chlorosilyl group
To prepare a solution prepared by dissolving 10 wt % of a non-aqueous solvent in a mixed solvent of 80 wt % n-hexadecane, 12 wt % carbon tetrachloride and 8 wt % chloroform, and the windshield for about 2 hours. Soaked. The front glass surface is formed with a natural oxide film, the hydroxyl group of the oxide film surface contains many, chlorine -SiCl group material containing a fluorocarbon group and a black <br/> b silyl group Then, the hydroxyl group was dehydrochlorinated and the bond shown in Chemical formula 1 was formed over the entire surface of the windshield .

[0017]

Embedded image That is, in the state where the monomolecular film 2 containing fluorine is chemically bonded to the surface of the translucent substrate , the chemical adsorption monomolecular film 2 is further formed on the surface of the windshield 1 through the siloxane bond as shown in FIG. It was The thickness of the chemisorption monomolecular film 2 is about 15 angstroms (1.5 n
m) . Since the monomolecular film was chemically bonded very strongly, it never peeled off.

An attempt was made to actually use this windshield, but it was possible to significantly reduce the adhesion of dirt compared to the untreated one, and even if it adhered, it could be easily removed by rubbing with a brush or the like. At this time, the windshield 1
The surface was not scratched at all. Further, even oil and fat stains could be removed only by washing with water.

When the material of the translucent substrate is plastic such as acrylic resin or polycarbonate resin,
It was possible to use the same technique by subjecting the surface to plasma treatment for, eg, 300 W for 10 minutes to oxidize the surface to make it hydrophilic and to replace the adsorbent with a Freon solvent.

[0020]

Example 2 In the case of a windshield whose surface is crosslinked with a crosslinkable plastic , which is hydrophilic but has a small proportion of hydroxyl groups, SiCl ₄ is used as a substance containing a chlorosilyl group in a chloroform solvent which is a non-aqueous solvent. When immersed in a solution of weight percent dissolved for about 30 minutes,
As shown in FIG. 2, since there are some hydrophilic hydroxyl groups (OH groups) 12 on the surface of the windshield 11, a dehydrochlorination reaction occurs on the surface and a chlorosilane monomolecular film of a substance containing a trichlorosilyl group is formed. It was Thus, when SiCl ₄ is used as the substance containing a trichlorosilyl group, a dehydrochlorination reaction occurs on the surface of the windshield 11 even if only a small amount of hydrophilic —OH groups 12 are present on the surface of the windshield 11. ), The molecule is fixed to the surface via the -SiO- bond.

[0021]

Embedded image At this time, since unreacted SiCl ₄ is also generally present on the chlorosilane monomolecular film, if it is subsequently washed with a nonaqueous solvent of chloroform and further washed with water, it does not react with the hydroxyl groups on the surface of the windshield 11. SiCl ₄ molecules of the windshield 11 are removed as shown in FIG.
A siloxane monomolecular film 13 of (Chemical Formula 3) or the like is obtained on the surface.

[0022]

Embedded image Since the monomolecular film 13 formed at this time is completely bonded to the surface of the windshield 11 through the chemical bond of —SiO—, it is never peeled off. Further, the obtained siloxane monomolecular film 13 has many SiOH bonds on the surface. About three times as many as the initial hydroxyl groups are generated.
Next, the windshield 11 having the siloxane monomolecular film 13 formed on the surface thereof is dipped in the solution described in Example 1 for about 1 hour to form a bond of Chemical formula 4 on the surface of the siloxane monomolecular film 13. As shown in FIG. 4, the chemical adsorption monomolecular film 14 containing fluorine is in a state of being chemically bonded to the siloxane monomolecular film 13 of the lower layer, and is about 15 ON over the entire mirror surface.
The film could be formed with a film thickness of gstrom (1.5 nm) .

[0024]

Embedded image The monomolecular film was not peeled at all even after the peeling test.

In addition, an attempt was made to use the windshield of this embodiment for practical use. However, due to the water repellency of fluorine on the surface, no water droplets adhered at all, and wax was included assuming the flow of wax components. Acetone was sprayed, but the oil was repelled by the effect of the oil repellency of the monomolecular film chemically adsorbed on the surface and was not clouded, and dirt could be easily wiped off.

When a monomolecular film is chemically adsorbed by using a non-aqueous solvent mixed with a substance containing a fluorocarbon group and a chlorosilane group, the surface to be left hydrophilic as an antifogging effect is given. polyvinyl alcohol aqueous solution can contact with the coating formed as organic solvent resistance of the hydrophilic coating (mask material),
After completion of the adsorption, the hydrophilic film (mask material) is washed away with water, and one surface as shown in FIG. 5 is a water- and oil-repellent antifouling monomolecular film 14 and the other surface has a hydrophilic hydroxyl group. Siloxa
The windshield of the monomolecular film 13 was obtained. The anti-fogging effect was confirmed with this glass, but the glass surface that remained hydrophilic did not fog at all.

In Example 1, in the case of a monolayer,
In Example 2, a case was shown in which a silane-based surfactant layer containing fluorine was accumulated after one layer of the siloxane monolayer, but the chemisorption monolayer of the present invention is not limited to one layer, but may be accumulated in multiple layers. The effect does not change.

Furthermore, in the above embodiment, CF ₃ (CF ₂ ) _{7 is} used as the fluorocarbon chlorosilane type surfactant.
(CH ₂₎ was used _{2 SiCl 3, CF 3 - (} C
F ₂ ) _p — (R) _m —SiCl _n X _{3-n has} a R portion of the chlorosilane-based surfactant, for example, a vinylene group (—CH═CH—) or an ethynylene group ( carbon-carbon triplet).
Incorporating or adding binding) Contact fluff, since it crosslinking by electron beam irradiation of about 5 Mrads after monolayer formation, it is possible to further improve the hardness of the monomolecular film.

Besides the above-mentioned fluorocarbon surfactants, (1) CF ₃ CH ₂ O (CH ₂ ) ₁₅ SiCl ₃ (2) CF ₃ (CH ₂ ) ₂ Si (CH ₃ ) _{2 (CH 2) 15 SiCl 3 (} 3) F (CF 2) 4 (CH 2) 2 Si (CH 3) 2 (CH 2) 9 SiCl 3 (4) CF 3 COO (CH 2) 15 SiCl 3 (5) Starting with trichlorosilane-based surfactants such as CF ₃ (CF ₂ ) ₅ (CH ₂ ) ₂ SiCl ₃ , for example, (6) CF ₃ CH ₂ O (CH ₂ ) ₁₅ Si (CH ₃ ) ₂ Cl (7) CF _{3 (CH 2) 2 Si (} CH 3) 2 (CH 2) 15 Si (CH 3) 2 Cl (8) CF 3 CH 2 O (CH 2) 15 Si (CH 3) Cl 2 (9) CF 3 COO Chlorsilane-based surfactants such as (CH ₂ ) ₁₅ Si (CH ₃ ) ₂ Cl were available. Also, alkoxysilane-based surfactants such as (10) CF ₃ (CF ₂ ) ₇ (CH ₂ ) ₂ Si (OCH ₃ ) ₃ (11) CF ₃ CH ₂ O (CH ₂ ) ₁₅ Si (OCH ₃ ) ₃ The same effect was obtained by heating the surfactant solution. Further, (12) CH ₃ (CH ₂ ) ₉ SiCl ₃ (13) CH ₃ (CH ₂ ) ₁₅ SiCl ₃ (14) CH ₃ CH ₂ O (CH ₂ ) ₁₅ SiCl ₃ (15) CH ₃ (CH ₂ ) ₂ With a chlorosilane-based surfactant having a hydrocarbon group such as Si (CH ₃ ) ₂ (CH ₂ ) ₁₅ SiCl ₃ as well, a chemisorption monomolecular film is formed at room temperature, and the effect of water repellency and antifouling property appears. It was

[0030]

As described above , according to the present invention, a monomolecular film having an extremely thin nanometer level film is formed into a translucent group.
Since it is formed on the body surface, the original luster of the transparent substrate is not impaired. In addition, when a fluorocarbon group is introduced into this film, it is also excellent in water and oil repellency, and the antifouling effect on the surface can be enhanced. Therefore, it is possible to efficiently and rationally provide a high-performance translucent substrate having an extremely high antifouling effect. Antifogging effect was also obtained by keeping further turned into a hydrophilic inner surface.

[Brief description of drawings]

FIG. 1 is a conceptual cross-sectional view in which a windshield, which is an example of a translucent substrate of the present invention, is enlarged to a molecular level.

FIG. 2 is a sectional process conceptual diagram in which the surface of a windshield which is another embodiment of the translucent substrate of the present invention is enlarged to a molecular level.

FIG. 3 is a sectional process conceptual diagram in which the surface of a windshield that is another embodiment of the translucent substrate of the present invention is enlarged to the molecular level.

FIG. 4 is a sectional process conceptual diagram in which the surface of a windshield which is another embodiment of the translucent substrate of the present invention is enlarged to a molecular level.

FIG. 5 is a conceptual diagram of a cross-sectional process in which the surface of a windshield that is another embodiment of the translucent substrate of the present invention is enlarged to the molecular level.

[Explanation of symbols]

 1 Windshield 2 Chemisorption monolayer 11 Windshield 12 Hydroxyl group 13 Siloxane monolayer 14 Chemisorption monolayer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-55-9652 (JP, A) “The 3rd volume of the 37th Applied Physics Joint Lecture Proceedings of the Spring 1990 (Heisei 2)” Applied Physics Academic Society (March 28, 1990) Page 1048

Claims (10)

(57) [Claims] 1. A surface containing a hydrophilic group or having a hydrophilic group
A transparent molded body substrate (hereinafter referred to as a transparent group) treated to contain
(2) a non-aqueous organic solvent solution containing a silane-based surfactant having a reactive silyl group at one end and a fluorocarbon group at the other end is contacted with at least one surface of
Reactive silicone between the hydrophilic group of the substrate and the silane-based surfactant
Fluorocarbon by dehydrochlorination reaction with
Method for producing a light-transmitting substrate, characterized in that has a group, and to form formed chemically adsorbed monomolecular film of water and oil repellency to the light-transmitting substrate table surface. 2. A surface containing a hydrophilic group or having a hydrophilic group
At least one surface of the translucent substrate treated so as to contain a non-aqueous solvent solution in which a substance for an inner layer film containing a chlorosilyl group is mixed , and then the unreacted chlorosilyl group on the translucent substrate is removed. The substance containing is removed by washing with a non-aqueous organic solvent, and then reacted with water to form a monolayer film for the inner layer film made of the substance containing a silanol group on the translucent substrate, and then a reactive silyl group is formed at one end. Has a hook at the other end
A water- and oil-repellent chemisorption monolayer having a fluorocarbon group on the silanol group-containing monomolecular film is brought into contact with a non-aqueous organic solvent solution in which a silane-based surfactant containing a fluorinated carbon group is contacted. A method of manufacturing a light-transmissive substrate, characterized by accumulating a molecular adsorption film. 3. A silanol type forming a chemically adsorbed monomolecular film cumulative
In between, coat one side of translucent substrate with water-soluble coating
The method for producing a translucent substrate according to claim 2 . Wherein the reactive silyl group, method for producing a translucent substrate according to claim 1 or 2 is chloro silyl group. 5. The silane-based surfactant is CF _3- (CF
₂ ) _n- (R) _m -SiCl _p X _3-p (n is 0 or an integer, m is 0 or 1, R is a methylene group having 1 or more carbon atoms,
Any of a methylene group having 1 or more carbon atoms of a vinylene group, a methylene group having 1 or more carbon atoms of an ethynylene group, a methylene group having 1 or more carbon atoms of a silicon atom or a methylene group having 1 or more carbon atoms of an oxygen atom. , X is a hydrogen atom, a lower alkyl group or a lower alkoxy group, and p is an integer of 0 to 2). 6. The substance containing a chlorosilyl group for the inner layer film is SiCl ₄ , SiHCl ₃ , SiH ₂ Cl ₂ or Cl.
The method for producing a light-transmitting substrate according to claim 2, wherein the method is any one of-(SiCl ₂ O) _n -SiCl ₃ (n is an integer). 7. The translucent substrate is made of resin.
3. The method for producing a translucent substrate according to item 2. 8. The surface of the translucent substrate is preliminarily oxygenated or nitrogenated.
Electron beam irradiation or ion beam irradiation treatment in an elementary atmosphere
The hydrophilic group is provided by the above-mentioned method, or
2. The method for producing a translucent substrate according to 2. 9. The hydrophilic group comprises a hydroxyl group, a carbonyl group and
A group having active hydrogen selected from amino groups.
8. The method for producing a transparent substrate according to item 8. 10. A silane-based surface active agent on the surface of a transparent substrate.
After contact with a non-aqueous organic solvent in which the agent is dissolved, unreacted substances
Of the translucent substrate according to claim 1 or 2, which is washed and removed.
Production method.