Glass substrate suitable for cover glass, etc., of mobile display device

A technology of glass substrates and substrates, which is applied in the field of glass substrates, can solve problems such as reduced smoothness and reduced adhesion of fluorine coatings, and achieves the effects of good manufacturing efficiency, improved transmittance, and high scratch resistance

Active Publication Date: 2018-06-08
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a diamond-like carbon (DLC) layer is formed on a glass substrate in order to improve hardness and scratch resistance, there is usually a problem that it is different from that formed on a glass substrate to impart smoothness to a cover glass. The adhesiveness of the fluorine coating on the surface is reduced, and the slipperiness is significantly reduced during use (see Patent Document 3)

Method used

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  • Glass substrate suitable for cover glass, etc., of mobile display device
  • Glass substrate suitable for cover glass, etc., of mobile display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0084] Hereinafter, examples of the present invention will be shown and the present invention will be specifically described, but the present invention should not be limitedly interpreted by the following examples. The meanings and measuring methods of the following abbreviations are as follows.

[0085] TEOS: Tetraethoxysilane

[0086] UPS: 3-ureidopropyltriethoxysilane

[0087] MeOH: Methanol

[0088] EtOH: ethanol

[0089] IPA: Isopropyl Alcohol

[0090] PGME: Propylene Glycol Monomethyl Ether

[0091] HG: hexanediol

[0092] BCS: Ethylene glycol monobutyl ether

[0093] AF: Made by FT-Net Co., Ltd., "Furuo Marto P-5425"

[0094] [Determination method of residual alkoxysilane monomer]

[0095] The residual alkoxysilane monomer in the polysiloxane solution was measured by gas chromatography (hereinafter referred to as GC). GC measurement was performed under the following conditions using Shimadzu GC-14B (manufactured by Shimadzu Corporation).

[0096] Column: capil...

manufacture example 1

[0108] MeOH (27.25g) which is a solvent, and TEOS (32.98g) which are alkoxysilanes were injected|thrown-in and stirred in the 4 neck reaction flask equipped with the reflux tube.

[0109] Next, a mixture of MeOH (11.23 g) as a solvent, 6% nitric acid solution (8.75 g) as an acid, and water (15.0 g) was added dropwise, followed by stirring for 30 minutes. After stirring, it refluxed for 2 hours, and then added 92% UPS (2.39g) and MeOH (2.39g) as an alkoxysilane, refluxed for 30 minutes, and left to cool to room temperature. After standing to cool, MeOH (70.67g) was injected|thrown-in as a solvent, and the solution (A) of polysiloxane was prepared.

[0110] When this polysiloxane solution was measured by GC, the alkoxysilane monomer was not detected.

Embodiment 1

[0116] The polysiloxane solution (A) (50g) obtained in Production Example 1 was diluted with PGME (30g), HG (10g), BCS (5g) and PB (5g) to prepare a coating solution for film formation (A1 ).

[0117] On a DLC layer of a glass substrate (thickness: 0.7 mm) formed with a DLC layer having a thickness of 100 nm by a sputtering method, the coating liquid (A1) for coating film formation was applied with a spin coater to form a coating film. Next, the glass plate on which the coating film was formed was dried on a hot plate at 80° C. for 3 minutes, and then cured in a clean oven at 300° C. for 30 minutes to obtain a glass substrate having a coating film (intermediate layer) with a thickness of 100 nm.

[0118] AF was applied on the intermediate layer of the glass substrate with a spin coater to form a fluorine coating film with a thickness of about 10 nm so that the contact angle became about 113°. Next, after drying at 80 degreeC for 3 minutes on a hot plate, it hardened at 170 degr...

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Abstract

Provided is a glass substrate suitable particularly as a cover glass or the like for a mobile display device, the glass substrate having high scratch resistance and smoothness, good visibility, and low reflectance. A glass substrate having, between a fluorine coating layer on a front surface side and a DLC layer on a substrate side, an intermediate layer containing a polysiloxane obtained by polycondensation of an alkoxy silane including an alkoxy silane represented by formula (1) and, as needed, an alkoxy silane represented by formula (2). (1): R1[Si(OR2)3]P (In formula (1), R1 represents a C1-12 hydrocarbon group substituted by a ureido group, R2 represents a C1-5 alkyl group, and p represents an integer of 1 or 2.) (2): (R3)nSi(OR4)4-n (In formula (2), R3 represents a hydrogen atom or aC1-8 hydrocarbon group which may be substituted by a hetero atom, a halogen atom, a vinyl group, an amino group, a glycidoxy group, a mercapto group, a methacryloxy group, an isocyanate group, or anacryloxy group, R4 represents a C1-5 alkyl group, and n represents an integer of 0-3.).

Description

technical field [0001] The invention relates to a glass substrate with high scratch resistance, smoothness, good visibility and low reflectivity, especially a glass substrate suitable for a glass cover sheet of a mobile display device and the like. Background technique [0002] In recent years, in liquid crystal display elements such as mobile devices and touch panels, cover glass sheets for protecting the surfaces of display elements are often used. In addition, glass plates having excellent scratch resistance and good visibility are also used for cover glasses of watches, viewfinders of cameras, and the like (see Patent Document 1 and Patent Document 2). [0003] The cover glass in such a display element is required to have high hardness and high scratch resistance so as to be less likely to be broken and scratched. However, when a diamond-like carbon (DLC) layer is formed on a glass substrate in order to improve hardness and scratch resistance, there is usually a problem...

Claims

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Application Information

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IPC IPC(8): G02B1/14B32B9/00B32B17/10B32B27/00C03C17/42C09D5/00C09D183/08G02B1/18
CPCB32B9/00B32B17/10B32B27/00C03C17/42C09D5/00C09D183/08G02B1/14G02B1/18C03C2217/70C03C2218/152C03C2218/154Y02P40/57
Inventor 大田政太郎饭沼洋介江口和辉
Owner NISSAN CHEM IND LTD
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