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US 7,452,605 B2Granted
Article superior in slipping waterdrops down surface thereof
AssigneeCentral Glass Company, Limited
InventorsYoshinori Akamatsu, Soichi Kumon, Hiroaki Arai, Shigeo Hamaguchi, Yukihiro Ogitani
Life of this patent
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Abstract
The invention relates to an article superior in slipping a waterdrop down a surface of the article. This article includes a substrate; and a functional film formed on a surface of the substrate. This functional film contains (a) a silica matrix; and (b) a component for providing the slipping. This component is dispersed in the silica matrix and contains a special, alkoxy group-terminated, dimethyl silicone.
Claims38
An article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- a functional film formed on a surface of said substrate, and
- an underlayer arranged between said substrate and said functional film, said underlayer comprising a metal oxide;
- wherein said article is prepared by a process comprising the steps of:
- (a) subjecting an alkoxysilane to hydrolysis and polycondensation in the presence of an acid catalyst, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- (b) mixing together an alkoxy group-terminated, dimethyl silicone represented by the formula [1] and said silica precursor sol, thereby preparing a coating liquid;
- where each of Y1 and Y2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000,
- (c) applying said coating liquid to said surface of said substrate, thereby forming thereon a precursory film;
- and
- (d) drying said precursory film into said functional film,
- wherein said alkoxy group-terminated, dimethyl silicone of step (b) has an average polymerization degree of 5-400.
12 more elements
A process for producing an article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- and
- a transparent functional film formed on a surface of said substrate, said process comprising the steps of:
- (a) subjecting an alkoxysilane to hydrolysis and polycondensation in the presence of an acid catalyst, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- (b) mixing together an alkoxy group-terminated, dimethyl silicone represented by the formula [1] having at least three alkoxy groups in the molecule and said silica precursor sol, thereby preparing a coating liquid;
- where each of Y1 and Y2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000, said process comprising:
- (c) applying said coating liquid to said surface of said substrate, thereby forming thereon a precursory film;
- and
- (d) drying said precursory film into said transparent functional film.
10 more elements
An article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- and
- a functional film formed on a surface of said substrate,
- wherein said article is prepared by a process comprising the steps of:
- (a) reacting an alkoxy group-terminated, dimethyl silicone represented by the formula [1], with a fluoroalkylsilane represented by the formula [2], thereby synthesizing a fluoroalkyl group-containing dimethyl silicone;
- where each of Y1 and 2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000,
- CF3(CF2)jCH2CH2Si(CH3)3—kZk [2 ]
- where j is an integer of 0-11, k is an integer of 1-3, and Z is a hydrolysable group,
- (b) subjecting an alkoxysilane to hydrolysis and polycondensation, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- (c) mixing together the fluoroalkyl group-containing dimethyl silicone of the step (a) and the silica precursor sol of the step (b), thereby preparing a coating liquid;
- (d) applying the coating liquid to the surface of the substrate, thereby forming thereon a precursory film;
- and
- (e) drying the precursory film into the functional film.
14 more elements
An article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- and
- a functional film formed on a surface of said substrate,
- wherein said article is prepared by a process comprising the steps of:
- (a) subjecting an alkoxysilane to hydrolysis and polycondensation, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- (b) mixing together an alkoxy group-terminated, dimethyl silicone represented by the formula [1], a fluoroalkylsilane represented by the formula [2] or [3], and the silica precursor sol of the step (a), thereby preparing a coating liquid;
- where each of Y1 and Y2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000,
- CF3(CF2)jCH2CH2Si(CH3)3—kZk [2]
- where j is an integer of 0-11, k is an integer of 1-3, and Z is a hydrolysable group,
- Zt(H3C)3-tSi—H2CH2C(CF2)sCH2CH2—Si(CH3)3—uZu [3]
- where s is an integer of 0-12, each of t and u is independently an integer of 1-3, and Z is a hydrolysable group,
- (c) applying the coating liquid to the surface of the substrate, thereby forming thereon a precursory film;
- and
- (d) drying the precursory film into the functional film.
15 more elements
A process for producing an article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- and
- a functional film formed on a surface of said substrate, said process comprising the steps of:
- (a) reacting an alkoxy group-terminated, dimethyl silicone represented by the formula [1], with a fluoroalkylsilane represented by the formula [2], thereby synthesizing a fluoroalkyl group-containing dimethyl silicone;
- where each of Y1 and Y2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000,
- CF3(CF2)jCH2CH2Si(CH3)3—kZk [2]
- where j is an integer of 0-11, k is an integer of 1-3, and Z is a hydrolysable group,
- (b) subjecting an alkoxysilane to hydrolysis and polycondensation, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- (c) mixing together the fluoroalkyl group-containing dimethyl silicone of the step (a) and the silica precursor sol of the step (b), thereby preparing a coating liquid;
- (d) applying the coating liquid to the surface of the substrate, thereby forming thereon a precursory film;
- and
- (e) drying the precursory film into the functional film.
13 more elements
A process for producing an article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- and
- a functional film formed on a surface of said substrate, said process comprising the steps of:
- (a) subjecting an alkoxysilane to hydrolysis and polycondensation, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- (b) mixing together an alkoxy group-terminated, dimethyl silicone represented by the formula [1], a fluoroalkylsilane represented by the formula [2] or [3], and the silica precursor sol of the step (a), thereby preparing a coating liquid;
- where each of Y1 and Y2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000,
- CF3(CF2)jCH2CH2Si(CH3)3—kZk [2]
- where j is an integer of 0-11, k is an integer of 1-3, and Z is a hydrolysable group,
- Zt(H3C)3-tSi—H2CH2C(CF2)sCH2CH2—Si(CH3)3—uZu [3]
- where s is an integer of 0-12, each oft and u is independently an integer of 1-3, and Z is a hydrolysable group,
- (c) applying the coating liquid to the surface of the substrate, thereby forming thereon a precursory film;
- and
- (d) drying the precursory film into the functional film.
14 more elements
A coating liquid for producing an article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- and
- a functional film formed on a surface of said substrate,
- wherein said coating liquid is prepared by a process comprising the steps of:
- (a) reacting an alkoxy group-terminated, dimethyl silicone represented by the formula [1], with a fluoroalkylsilane represented by the formula [2], thereby synthesizing a fluoroalkyl group-containing dimethyl silicone;
- where each of Y1 and Y2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000,
- CF3(CF2)jCH2CH2Si(CH3)3—kZk [2]
- where j is an integer of 0-11, k is an integer of 1-3, and Z is a hydrolysable group,
- (b) subjecting an alkoxysilane to hydrolysis and polycondensation, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- and
- (c) mixing together the fluoroalkyl group-containing dimethyl silicone of the step (a) and the silica precursor sol of the step (b), thereby preparing the coating liquid.
12 more elements
A coating liquid for producing an article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- and
- a functional film formed on a surface of said substrate,
- wherein said coating liquid is prepared by a process comprising the steps of:
- (a) subjecting an alkoxysilane to hydrolysis and polycondensation, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- (b) mixing together an alkoxy group-terminated, dimethyl silicone represented by the formula [1], a fluoroalkylsilane represented by the formula [2] or [3], and the silica precursor sol of the step (a), thereby preparing the coating liquid;
- where each of Y1 and Y2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000,
- CF3(CF2)jCH2CH2Si(CH3)3—kZk [2]
- where j is an integer of 0-11, k is an integer of 1-3, and Z is a hydrolysable group,
- Zt(H3C)3-tSi—H2CH2C(CF2)sCH2CH2—Si(CH3)3—uZu [3]
- where s is an integer of 0-12, each of t and u is independently an integer of 1-3, and Z is a hydrolysable group.
12 more elements
An article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- and
- a transparent functional film formed on a surface of said substrate,
- wherein said article is prepared by a process comprising the steps of:
- (a) subjecting an alkoxysilane to hydrolysis and polycondensation in the presence of an acid catalyst, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- (b) mixing together an alkoxy group-terminated, dimethyl silicone represented by the formula [1] having at least three alkoxy groups in the molecule and said silica precursor sol, thereby preparing a coating liquid;
- where each of Y1 and Y2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000,
- (c) applying said coating liquid to said surface of said substrate, thereby forming thereon a precursory film;
- and
- (d) drying said precursory film into said transparent functional film,
- wherein said alkoxy group-terminated, dimethyl silicone of step (b) is in an amount of 1-300 wt % based on a weight of said silica matrix.
12 more elements
A process for producing an article superior in slipping a waterdrop down a surface of said article, said article comprising:
- a substrate;
- and
- a functional film formed on a surface of said substrate, said process comprising the steps of:
- (a) subjecting an alkoxysilane to hydrolysis and polycondensation in the presence of an acid catalyst, thereby preparing a silica precursor sol for forming a silica matrix in the functional film;
- (b) mixing together an alkoxy group-terminated, dimethyl silicone represented by the formula [1] and said silica precursor sol, thereby preparing a coating liquid;
- where each of Y1 and Y2 is independently a bivalent alkylene group, —(CH2)i—NH—CO—O—, or oxygen;
- R is a monovalent alkyl group;
- i is 0 or a positive integer;
- each of p and q is an integer of 1-3 independently;
- and n is an integer of not greater than 2,000, said process comprising:
- (c) applying said coating liquid to said surface of said substrate, thereby forming thereon a precursory film;
- and
- (d) drying said precursory film into said functional film,
- wherein said alkoxy group-terminated, dimethyl silicone of the step (b) is a reaction product prepared by reacting a silanol group-terminated, dimethyl silicone represented by the formula [5] with an alkoxysilane represented by the formula [6],
- where n is defined as above,
- Rx—Si(CH3)3—m(OR)m [6]
- where m is an integer of 1-3, OR is an alkoxy group, and Rx is a monovalent, straight-chain, organic group terminated with an isocyanate group.
14 more elements
Dependencies are inferred from the claim text.