EP0492545A2
Expired / Lapsed
EP
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Transparent substrate with monomolecular film thereon and method of manufacturing the same
Assignee: Panasonic Holdings Corp
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Filing: 1991-12-20
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Granted: —
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Expires: 2011-12-20
Abstract
Abstract At least one monomolecule film is formed on a transparent substrate surface (11) directly or via a protective film. The monomolecule film (12) is formed with chemical coupling of haliole-based silane or alkoxy silane-based surface active compound, for example, of the formula: F(CF₂) m (CH₂) n SiR q X 3- 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) p SiR q X 3-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-, -COO- or -Si(CH₃)₂-. The transparent substrate (11) such as glass is made hydrophobic and free of contamination.
Inventors
- 👤 Kazufumi Ogawa
- 👤 Norihisa Mino
- 👤 Mamoru Soga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/28; C03C17/30; B; B05; B05D; B05D1/00; B05D1/18; B05D1/185; B82; B82Y; B82Y30/00; B82Y40/00; C03C2217/00; C03C2217/70; C03C2217/76
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
49 words
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 covalent bond to the surface of the substrate.
Claim 2
Dependent Claim
23 words
The transparent substrate according to claim 1, wherein the monomolecule film containing hydrophobic groups is bonded to the surface through a -Si- group.
Claim 3
Dependent Claim
31 words
The transparent substrate according to claim 1, wherein the monomolecule film containing hydrophobic group is bonded to the surface through siloxane bonds via a siloxane-based protective film prepared on the substrate.
Claim 4
Dependent Claim
16 words
The transparent substrate according to claim 1, wherein the hydrophobic group is a fluorine-containing hydrocarbon group.
Claim 5
Dependent Claim
58 words
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.
Claim 6
Dependent Claim
16 words
The transparent substrate according to claim 5, wherein the hydrophobic group is a fluorine-containing hydrocarbon group.
Claim 7
Dependent Claim
15 words
The transparent substrate according to claim 5, wherein the hydrophilic groups is a hydroxyl group.
Claim 8
Dependent Claim
200 words
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: A) F(CF₂) m (CH₂) n SiR q X 3-q [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 renges 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) p SiR q X 3-q (B) [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-].
Claim 9
Dependent Claim
25 words
The transparent substrate according to claim 8, wherein the monomolecule film is bonded to the protective film covering the substrate through a chemical covalent bond.
Claim 10
Dependent Claim
31 words
The transparent substrate according to claim 8, wherein said silane halide-based surface active compound is a chlorosilane-based surface active compound of the formula: CF₃(CH₂)₂Si(CH₃)₂(CH₂)₁₅SiCl₃, CF₃(CF₂)₃(CH₂)₂Si(CH₃)₂(CH₂)₉Si Cl₃, CF₃CH₂O(CH₂)₁₅SiCl₃, CF₃COO(CH₂)₁₅SiCl₃, CF₃(CF₂)₇(CH₂)₂Si(OCH₃)Cl₂, or CF₃(CF₂)₇(CH₂)₂Si(CH₃)Cl₂.
Claim 11
Independent Claim
95 words
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 adosorbed to the surface, thereby forming a monomolecule film having the hydrophobic group and -Si- group and being covalently bonded to the applied surface.
Claim 12
Dependent Claim
23 words
The method of according to claim 11, wherein the silane-based surface active compound is a chemical material containing an end chlorosilyl (-SiCl) group.
Claim 13
Independent Claim
74 words
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.
Claim 14
Dependent Claim
14 words
The method according to claim 13, wherein the reactive silane group is chlorosilane group.
Claim 15
Dependent Claim
97 words
The method according to claim 13, wherein the silane-based surface active compound is represented by the formula: CF₃-(CF₂) t -(R²) r -SiCl v Y 3-v [where t is an integer of at least 0, preferably 0 to 10, r is 0 or 1, R² is an alkylene group of from 1 to 20 carbon atoms which may contain a vinylene (-CH=CH-), ethynylene (-C≡C-) group or may be interrupted by a -O-, -Si(CH₃)₂- or -COO-, Y is a hydrogen atom, a lower alkyl group or lower alkoxyl group and v is an integer ranging from 0 to 2].
Claim 16
Independent Claim
146 words
A method of modifying a surface of a molded transparent substrate having two surface, comprising: (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.
Claim 17
Dependent Claim
56 words
The method according to claim 16, which further comprises between the steps (C) and (D), coating one surface of the transparent substrate with a water-soluble coating film and, after the step (D), removing the water soluble coating film, thereby forming a hydrophobic monomolecule film on one surface and a hydrophilic monomolecule film on the other surface.
Claim 18
Dependent Claim
15 words
The method according to claim 16, wherein the reactive silane group is a chlorosilane group.
Claim 19
Dependent Claim
97 words
The method according to claim 16, wherein the silane-based surface active compound is represented by the formula: CF₃-(CF₂) t -(R²) r -SiCl v Y 3-v [where t is an integer of at least 0, preferably 0 to 10, r is 0 or 1, R² is an alkylene group of from 1 to 20 carbon atoms which may contain a vinylene (-CH=CH-), ethynylene (-C≡C-) group or may be interrupted by a -O-, -Si(CH₃)₂- or -COO-, Y is a hydrogen atom, a lower alkyl group or lower alkoxyl group and v is an integer ranging from 0 to 2].
Claim 20
Dependent Claim
38 words
The method according to claim 16, wherein the material having at least two chlorosilyl groups is selected from the group consisting of: SiCl₄, SiHCl₃, SiH₂Cl₂, and Cl-(SiCl₂O) n SiCl₃ (where n is an integer of 1 to 4).
References Cited (Backward Citations)
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