# US 8,570,642 B2 · Light control film

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,570,642 B2
- Document ID: US8570642B2
- Status: Granted
- Kind: B2
- Application number: 13/575,108
- Filed: 2011-01-26
- Published: 2012-12-13
- Granted: 2013-10-29
- Earliest claimed: 2010-01-26
- Assignees: Hitachi Chemical Company, Ltd.
- Applicants: Satoyuki Nomura; Yoshii Morishita; Tooru Tanaka
- Inventors: Satoyuki Nomura; Yoshii Morishita; Tooru Tanaka
- Web page: https://patentgrep.com/patent/US8570642B2

## CPC

- C09D 4/06: {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
- C08G 18/3206: {aliphatic}
- C08G 18/673: {containing two or more acrylate or alkylacrylate ester groups}
- C08G 18/755: {and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate}
- G02F 1/172: {based on a suspension of orientable dipolar particles, e.g. suspended particles displays}
- C08G 2261/3223: containing one or more sulfur atoms as the only heteroatom, e.g. thiophene
- C08G 2261/51: Charge transport
- C08G 2261/794: with polymeric dopants
- C08L 65/00: Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Disclosed is a light control film comprising: two of transparent conductive resin substrates each having a transparent conductive layer and a transparent resin substrate; and a light control layer interposed between the two transparent conductive resin substrates to be in contact with the transparent conductive layer sides, the light control layer containing: a resin matrix; and a light control suspension dispersed in the resin matrix, wherein the transparent conductive layer contains: an organic binder resin; and a conductive polymer. The present invention can provide a light control film having satisfactory adhesiveness between the light control layer and the transparent conductive layer and having excellent radio wave transparency.

## Claims

### Claim 1

A light control film comprising: two of transparent conductive resin substrates each having a transparent conductive layer and a transparent resin substrate; and a light control layer interposed between the two transparent conductive resin substrates to be in contact with the transparent conductive layer sides, the light control layer containing: a resin matrix; and a light control suspension dispersed in the resin matrix,
wherein the transparent conductive layer contains: an organic binder resin; and a conductive polymer.

### Claim 2 (depends on 1)

The light control film according to claim 1, wherein the conductive polymer is at least one selected from the group consisting of a polythiophene derivative, a polyaniline derivative, and a polypyrrole derivative.

### Claim 3 (depends on 1)

The light control film according to claim 1, wherein the organic binder resin is a resin obtainable by curing a polymerizable monomer or a polymerizable oligomer with heat or light.

### Claim 4 (depends on 1)

The light control film according to claim 1, wherein the entirety or a portion of the organic binder resin is composed of (meth)acrylate containing a hydroxyl group.

### Claim 5 (depends on 1)

The light control film according to claim 1, wherein the entirety or a portion of the organic binder resin is composed of urethane acrylate containing a pentaerythritol skeleton.

### Claim 6 (depends on 1)

The light control film according to claim 1, wherein the transparent conductive layer has a surface resistivity value of the transparent conductive layer of 1000Ω/□ or greater.

### Claim 7 (depends on 1)

The light control film according to claim 1, wherein a radio wave shielding property in the frequency range of 500 MHz or higher is 5 dB or less.