Transparent substrate and method of manufacturing the same
First Claim
1. A transparent substrate comprising at least one monomolecule film formed as an outer most surface layer on at least one surface of the transparent substrate either directly or indirectly, wherein the monomolecule film contains a hydrophobic group and is bonded through a covalent bond to the surface of the substrate.
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Abstract
At least one monomolecule film is formed on a transparent substrate surface directly or via a protective film. The monomolecule film is formed with chemical coupling of chlorosilane surface active compound, for example, of the formula:
F(CF2)m(CH2)nSiRqX3—q
where m is an integer of from 1 to 15, n is an integer of from 0 to 15 provided that the total of m and n is an integer of from 10 to 30 and R is an alkyl or an alkoxyl group, or
F(CF2)m′(CH2)n′A(CH2)pSiRqX3−q
where m represents an integer ranging from 1 to 8, n′ represents an integer ranging from 0 to 2, p represents an integer ranging from 5 to 25, q represents an integer ranging from 0 to 2, X represents a halogen atom or an alkoxyl group, R represents an alkyl or an alkoxyl group, and A represents —O—, a —COO— or —Si(CH3)2—. The transparent substrate such as glass is made hydrophobic and free of contamination.
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Citations
26 Claims
- 1. A transparent substrate comprising at least one monomolecule film formed as an outer most surface layer on at least one surface of the transparent substrate either directly or indirectly, wherein the monomolecule film contains a hydrophobic group and is bonded through a covalent bond to the surface of the substrate.
- 5. A transparent substrate comprising a monomolecule film formed as an outer most surface layer on both surfaces of the transparent substrate either directly or indirectly, wherein one of the surfaces is covered with a covalently bonded monomolecule film containing a hydrophobic group, and the other surface is covered with a covalently bonded monomolecule film containing a hydrophilic group.
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8. A transparent substrate comprising at least one monomolecule film formed as an outer most surface layer on at least one surface of the transparent substrate either directly or via a protective film, wherein the monomolecule film is formed by a chemical covalent bonding from a silane halide-based or alkoxy silane-based surface active compound of the formula:
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F′
(CF2)m(CH2)nSiRqX3−
q
(A)where m represents an integer ranging from 1 to 15, n represents an integer ranging from 0 to 15, the sum of m and n ranges from 10 to 30, q represents an integer ranging from 0 to 2, R represents an alkyl or an alkoxyl group, and X is a halogen atom or an alkoxyl group, or of the formula; F(CF2)m′
(CH2)n′
A(CH2)pSiRqX3−
q
(B)[where m′
represents an integer ranging from 1 to 8, n′
represents an integer ranging from 0 to 25, q represents an integer ranging from 5 to 25, q represents an integer ranging from 0 to 2, X represents a halogen atom or an alkoxyl group, R represents an alkyl or an alkoxyl group, and A represents —
O—
, a —
COO—
or —
Si(CH3)2—
].- View Dependent Claims (9, 10)
CF3(CH2)2Si(CH3)2(CH2)15SiCl3,CF3(CF2)3(CH2)2Si(CH3)2(CH2)9SiO13,CF3CH2O(CH2)15SiCl3,CF3COO(CH2)15SiCl3,CF3(CF2)7(CH2)2Si(OCH3)C12, orCF3(CF2)7(CH2)2Si(CH3)C12.
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11. A method of modifying a surface of a transparent substrate comprising:
applying, in a non-aqueous organic solvent, a silane-based surface active compound having a reactive silane group at one end and a hydrophobic group at the other end containing fluorine, to a surface of the transparent substrate or on a surface of a protective film provided on the transparent substrate under such conditions that the silane-based surface active compound is chemically adsorbed to the surface, thereby forming a monomolecule film having the hydrophobic group and —
Si—
group and being covalently bonded to the applied surface.- View Dependent Claims (12)
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13. A method of modifying a surface of a transparent substrate comprising:
contacting a surface of a molded transparent substrate with an organic solvent solution of a silane-based surface active compound having a reactive silane group at one end and a hydrophobic group at the other end to form a chemically adsorbed monomolecule film from the silane-based surface active compound on at least one surface of the transparent substrate or over the entire surface area - View Dependent Claims (14, 15)
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16. A transparent method of modifying a surface of a molded substrate having two surface, comprising:
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(A) contacting both of the surface of the molded transparent substrate with a non-aqueous solvent containing a material having at least two chlorosilyl groups;
(B) washing the transparent substrate using a non-aqueous organic solution to remove the non-reacted material having at least two chlorosilyl groups of the transparent substrate after the contacting step;
(C) treating the transparent substrate with water after the non-reacted material washing step, thereby forming a hydrophilic monomolecule film composed of a silane material having at least one silanol group; and
(D) treating the transparent substrate having thus formed silanol groups with silane-based surface active compound having a reactive silane group at one end and a hydrophobic group at the other end, thereby laminating a chemically adsorbed hydrophobic monomolecule film on the hydrophilic monomolecule film having silanol groups. - View Dependent Claims (17, 18, 19, 20)
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21. A transparent substrate comprising at least one monomolecule film formed as an outer most surface layer on at least one surface of an optical device, either directly or indirectly, wherein said monomolecule film contains a hydrophobic group and is bonded through a covalent bond to the surface of said optical device,
wherein said optical device is selected from the group consisting of motor vehicle glasses and windshields, building window glasses, mirrors, optical lenses, fresnel lenses, glass lenses, and transparent tempered glass.
Specification