EP0749021A2
Expired / Lapsed
EP
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Antireflection filter
Assignee: Daikin Industries Ltd
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Filing: 1996-06-14
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Granted: —
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Expires: 2016-06-14
Abstract
Abstract An antireflection filter comprising a film- or sheet-form transparent substrate, an antireflection coating on at least one surface of the substrate, which coating contains an inorganic compound, and a stain proofing layer on the antireflection coating, which layer contains a specific silane compound having an average molecular weight of 5 x 10<2> to 1 x 10<5>.
Inventors
- 👤 Shinsuke Ochiai
- 👤 Yukio Yasunori
- 👤 Yuji Tanaka
- 👤 Hitoharu Hachisuka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 20:19
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/18; B; B32; B32B; B32B27/00; B32B27/06; G02B1/04; G02B1/11; G02B1/111; G02B1/113; G02B27/00; G02B27/0006; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
171 words
An antireflection filter comprising a film- or sheet-form transparent substrate, an antireflection coating on at least one surface of said substrate, which coating comprises an inorganic compound, and a stain proofing layer on said antireflection coating, which layer comprises a silane compound having a number average molecular weight of 5 x 10 2 to 1 x 10 5 represented by the formula (I): wherein R f is a straight or branched perfluoroalkyl group having 1 to 16 carbon atoms, X is an iodine atom or a hydrogen atom, Y is a hydrogen atom or a lower alkyl group, Z is a fluorine atom or a trifluoromethyl group, R 1 is a hydrolyzable group, R 2 is a hydrogen atom or an inactive monovalent organic group, a, b, c and d are the same or different and each an integer of 0 to 200, e is 0 or 1, m and n are the same or different and each 0, 1 or 2, and p is an integer of 1 to 10.
Claim 2
Dependent Claim
46 words
The antireflection filter according to claim 1, wherein, in the formula (1), R f is -C 3 F 7 , a is an integer of 1 to 50, b, c and d are 0, e is 1, Z is a fluorine atom and n is 0.
Claim 3
Dependent Claim
18 words
The antireflection filter according to claim 1 or 2, wherein p in the formula (1) is 1 (one).
Claim 4
Dependent Claim
25 words
The antireflection filter according to any of claims 1 to 3 which further comprises a hard coating layer between said substrate and said antireflection coating.
Claim 5
Dependent Claim
22 words
The antireflection filter according to any of claims 1 to 4, wherein said substrate has a thickness of 0.01 to 10 mm.
Claim 6
Dependent Claim
46 words
The antireflection filter according to any of claims 1 to 5, wherein said antireflection coating comprises at least two layers, and the layer of said coating which is remotest from said substrate comprises a material selected from the group consisting of silicon dioxide and metal oxides.
Claim 7
Dependent Claim
24 words
The antireflection filter according to any of claims 1 to 6, wherein said stain proofing layer has a thickness of 0.001 to 0.03 µm.
Claim 8
Dependent Claim
54 words
A method for the stain proofing of an antireflection filter which a film- or sheet-form transparent substrate and an antireflection coating on at least one surface of said substrate, said coating comprising an inorganic compound, comprising providing a layer of a silane compound of the formula (1) in claim 1 on said antireflection coating.
Claim 9
Dependent Claim
22 words
The method according to claim 8, wherein said layer of the silane compound has a thickness of from 0.001 to 0.03 µm.
Claim 10
Dependent Claim
29 words
The method according to claim 8 or 9, wherein said silane compound is applied in the form of a solution with a concentration of 0.05 to 0.5 wt. %.
Claim 11
Dependent Claim
14 words
The method according to claim 10, wherein said solution is one in a perfluorohydrocarbon.
Claim 12
Independent Claim
45 words
The method according to any of claims 8 to 11, wherein said antireflection coating comprises at least two layers, and the layer of said coating which is remotest from said substrate comprises a material selected from the group consisting of silicon dioxide and metal oxides.
References Cited (Backward Citations)
No citation records indexed.
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