# US 2013/0280447 A1 · Solar control glass and solar control double glass having the solar control glass

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- Number: US 2013/0280447 A1
- Document ID: US20130280447A1
- Status: Published application
- Kind: A1
- Application number: 13/996,601
- Filed: 2011-12-07
- Published: 2013-10-24
- Earliest claimed: 2010-12-22
- Assignees: Bridgestone Corporation
- Inventors: Yuji Suzuki; Akito Hatanaka
- Web page: https://patentgrep.com/patent/US20130280447A1

## CPC

- C03C 17/32: with synthetic or natural resins (C03C17/30 takes precedence)
- B60J 3/007: {Sunglare reduction by coatings, interposed foils in laminar windows, or permanent screens (layered glass products B32B17/00; process of coating windows C03C17/00)}
- C03C 17/3405: {with at least two coatings of organic materials (C03C17/36, C03C17/42 take precedence)}
- C03C 2217/445: Organic continuous phases
- C03C 2217/475: Inorganic materials
- C03C 2217/73: Anti-reflective coatings with specific characteristics
- Y10T 428/269: including synthetic resin or polymer layer or component
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- B60J: WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES (fastening, suspending, closing, or opening of such devices E05)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A solar control glass, which has excellent heat-ray shielding property, especially heat-ray reflection property (thermal insulation property), and suppresses occurrence of electromagnetic interference, and which can be produced in low cost, is provided. The solar control glass 10 which comprises a glass plate 11 and a heat-ray reflection layer 14 comprising an electrically-conductive polymer provided thereon, wherein the heat-ray reflection layer 14 has a surface emissivity of not more than 0.7, and the electrically-conductive polymer in the heat-ray reflection layer 14 has an electrical conductivity of 0.005 to 200 S/cm, and a solar control double glass having the solar control glass.

## Claims

### Claim 1

A solar control glass which comprises a glass plate and a heat-ray reflection layer comprising an electrically-conductive polymer provided thereon,
wherein the heat-ray reflection layer has a surface emissivity of not more than 0.7, and the electrically-conductive polymer in the heat-ray reflection layer has an electrical conductivity of 0.005 to 200 S/cm.

### Claim 2 (depends on 1)

A solar control glass as defined in claim 1, wherein the electrically-conductive polymer in the heat-ray reflection layer has an electrical conductivity of 0.01 to 100 S/cm.

### Claim 3 (depends on 1)

A solar control glass as defined in claim 1, wherein the electrically-conductive polymer in the heat-ray reflection layer has an electrical conductivity of 0.1 to 20 S/cm.

### Claim 4 (depends on 1)

A solar control glass as defined in claim 1, wherein the heat-ray reflection layer has a thickness of 10 to 3,000 nm.

### Claim 5 (depends on 1)

A solar control glass as defined in claim 1, wherein a product (k·d) of the electrical conductivity (k (S/cm)) of the electrically-conductive polymer in the heat-ray reflection layer and the thickness (d (nm)) of the heat-ray reflection layer is 0.5 to 20000.

### Claim 6 (depends on 1)

A solar control glass as defined in claim 1, wherein the electrically-conductive polymer is a polythiophene derivative comprising a recurring unit represented by the following formula (I):
in which R1 and R2 independently represent a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, or R1 and R2 combine with each other to form an alkylene group of 1 to 4 carbon atoms which may be arbitrarily substituted, and n is an integer of 50 to 1,000.

### Claim 7 (depends on 1)

A solar control glass as defined in claim 1, wherein the solar control glass comprises further a heat-ray shielding layer which consist of a resin composition comprising a near-infrared absorbing agent and a binder.

### Claim 8 (depends on 7)

A solar control glass as defined in claim 7, wherein the near-infrared absorbing agent is tungsten oxide and/or composite tungsten oxide.

### Claim 9 (depends on 8)

A solar control glass as defined in claim 8, wherein the tungsten oxide is represented by a general formula WyOz wherein W represents tungsten, O represents oxygen, and y and z satisfy the condition of 2.2≦z/y≦2.999, and the composite tungsten oxide is represented by a general formula MxWyOz wherein M represents at least one element selected from H, He, alkaline metals, alkaline-earth metals, rare-earth elements, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be, Hf, Os, Bi and I, W represents tungsten, O represents oxygen, and x, y and z satisfy the conditions of 0.001≦x/y≦1 and 2.2≦z/y≦3.

### Claim 10 (depends on 7)

A solar control glass as defined in claim 7, wherein the heat-ray shielding layer has a thickness of 0.5 to 50 μm.

### Claim 11 (depends on 1)

A solar control glass as defined in claim 1, wherein the solar control glass has further a surface protection layer formed on the heat-ray reflection layer, the surface protection layer having a thickness of not more than 2 μm.

### Claim 12 (depends on 11)

A solar control glass as defined in claim 11, wherein the surface protection layer is a hard coat layer formed from an ultraviolet-curable resin composition or a thermosetting resin composition.

### Claim 13 (depends on 1)

A solar control double glass which comprises a solar control glass as defined in claim 1, and another glass plate, the solar control glass and the another glass being arranged at an interval such that the heat-ray reflection layer or the surface protection layer faces the another glass and the interval forming a hollow layer.