# US 2013/0158140 A1 · Anti-reflection coating composition and process for preparing the same

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

- Number: US 2013/0158140 A1
- Document ID: US20130158140A1
- Status: Published application
- Kind: A1
- Application number: 13/714,615
- Filed: 2012-12-14
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Eternal Chemical Co., Ltd.
- Inventors: Chi-Chuan LIN; Li-Wen JUAN; Hui-Isun HUANG
- Web page: https://patentgrep.com/patent/US20130158140A1

## CPC

- C09D 5/006: {Anti-reflective coatings}
- C09D 7/61: inorganic
- C09D 7/70: {characterised by shape, e.g. fibres, flakes or microspheres}
- C08K 7/26: Silicon- containing compounds
- 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)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The present invention relates to an anti-reflection coating composition containing hollow particles, an adhesive, and a hydrophobic organic solvent, wherein the weight ratio of the hollow particles to the solids content of the adhesive is in the range of 1:2 to 1:20. The present invention also provides a method for producing the anti-reflection coating composition.

## Claims

### Claim 1

An anti-reflection coating composition, comprising hollow particles, an adhesive and a hydrophobic organic solvent, wherein the hollow particles are dispersed in the adhesive and are chemically bonded with the adhesive, and the weight ratio of the hollow particles to the solid content of the adhesive is in the range of 1:2 to 1:20.

### Claim 2 (depends on 1)

The anti-reflection coating composition according to claim 1, wherein the hollow particles are inorganic oxide particles containing an element selected from the group consisting of silicon, titanium, zirconium and a combination thereof.

### Claim 3 (depends on 2)

The anti-reflection coating composition according to claim 2, wherein the hollow particles are hollow silica particles.

### Claim 4 (depends on 1)

The anti-reflection coating composition according to claim 1, wherein the adhesive has a hydrophobic group selected from the group consisting of phenyl, benzyl, alkyl and a combination thereof, and has a group —Si(OR1)n(R2)3-n, wherein n is an integer of 2 or 3, R1 is each independently H or C1-4 alkyl, and R2 is each independently H or C1-4 alkyl.

### Claim 5 (depends on 1)

The anti-reflection coating composition according to claim 1, wherein the adhesive is a polyacrylic resin modified by a silicon-containing compound or a polysiloxane resin.

### Claim 6 (depends on 5)

The anti-reflection coating composition according to claim 5, wherein the silicon-containing compound is an organosilane terminated with a reactive group, and the reactive group is an organic group having an amino group, a hydroxyl group, a mercapto group, an isocyanate group, an epoxy group, a vinyl group or a (methyl)acryloxy group.

### Claim 7 (depends on 1)

The anti-reflection coating composition according to claim 1, wherein the weight ratio of the hollow particles to the solid content of the adhesive is in the range of 1:3 to 1:20.

### Claim 8 (depends on 7)

The anti-reflection coating composition according to claim 7, wherein the weight ratio of the hollow particles to the solid content of the adhesive is in the range of 1:3 to 1:10.

### Claim 9 (depends on 1)

The anti-reflection coating composition according to claim 1, wherein the hydrophobic organic solvent is selected from the group consisting of toluene, ethyl acetate, butyl acetate and a combination thereof.

### Claim 10 (depends on 1)

The anti-reflection coating composition according to claim 1, wherein the ratio of the weight of the hydrophobic organic solvent to the total weight of the hollow particles and the solid content of the adhesive is in the range of 1.5:1 to 40:1.

### Claim 11 (depends on 10)

The anti-reflection coating composition according to claim 10, wherein the ratio of the weight of the hydrophobic organic solvent to the total weight of the hollow particles and the solid content of the adhesive is in the range of 2:1 to 15:1.

### Claim 12 (depends on 1)

The anti-reflection coating composition according to claim 1, wherein the hollow particles have a size in the range of 10 nm to 100 nm.

### Claim 13 (depends on 1)

A method for preparing the anti-reflection coating composition according to claim 1, comprising:
(a) mixing a polyelectrolyte with a base, and a protic solvent is added to the mixture;
(b) slowly adding an inorganic oxide precursor to the solution obtained in Step (a), so that the inorganic oxide covers the surface of the polyelectrolyte to form composite particles;
(c) adding an adhesive to the solution obtained in Step (b);
(d) adding a hydrophobic organic solvent to the solution obtained in Step (c), so that the polyelectrolyte is dissolved out of the center of the composite particles and hollow particles are prepared and phase separation occurs, and the hollow particles, adhesive and hydrophobic organic solvent are distributed in an upper liquid, and the polyelectrolyte, protic solvent and remaining components are distributed in a lower liquid; and
(e) taking out the upper liquid to prepare the coating composition.

### Claim 14 (depends on 13)

The method according to claim 13, wherein Steps (a) to (e) are carried out at a temperature in the range of 25° C. to 60° C.

### Claim 15 (depends on 13)

The method according to claim 13, wherein the polyelectrolyte comprises polyacrylic acid, sodium polyacrylate and sodium polymethacrylate.

### Claim 16 (depends on 13)

The method according to claim 13, wherein the base is ammonia or aqueous ammonia.

### Claim 17 (depends on 13)

The method according to claim 13, wherein the protic solvent is selected from the group consisting of water, alcohols, organic acids and a combination thereof.

### Claim 18 (depends on 17)

The method according to claim 17, wherein the protic solvent is an alcohol.

### Claim 19 (depends on 13)

The method according to claim 13, wherein in Step (a), the weight ratio of the polyelectrolyte to the base is in the range of 1:30 to 1:60.

### Claim 20 (depends on 13)

The method according to claim 13, wherein in Step (a), the weight ratio of the protic solvent to the base is in the range of 1:1 to 99:1.

### Claim 21 (depends on 20)

The method according to claim 20, wherein in Step (a), the weight ratio of the protic solvent to the base is in the range of 5:1 to 35:1.

### Claim 22 (depends on 13)

The method according to claim 13, wherein the inorganic oxide precursor is a material containing an element selected from the group consisting of silicon, titanium, zirconium and a combination thereof.

### Claim 23 (depends on 22)

The method according to claim 22, wherein the inorganic oxide precursor has the formula below:
R5mSi(OR6)4-m
wherein R5 is each independently selected from C1-4 alkoxy, C2-4 alkenyl, phenyl, C1-4 alkyl and an epoxy group; R6 is each independently selected from C1-4 alkyl; and m is 0 or 1.

### Claim 24 (depends on 23)

The method according to claim 23, wherein the inorganic oxide precursor is selected from the group consisting of tetramethoxysilane, tetraethoxysilane, methyltriethoxysilane and a combination thereof.

### Claim 25 (depends on 24)

The method according to claim 24, wherein the inorganic oxide precursor is tetraethoxysilane.

### Claim 26 (depends on 13)

The method according to claim 13, wherein in Step (b), the weight ratio of the inorganic oxide precursor to the base is in the range of 20:1 to 1:10.

### Claim 27 (depends on 26)

The method according to claim 26, wherein in Step (b), the weight ratio of the inorganic oxide precursor to the base is in the range of 6:1 to 1:6.

### Claim 28 (depends on 13)

The method according to claim 13, wherein Step (c) is carried out at normal temperature and the reaction time is in the range of 1 hour to 12 hours.

### Claim 29 (depends on 13)

The method according to claim 13, wherein the weight ratio of the solid content of the adhesive in Step (c) to the inorganic oxide precursor in Step (b) is in the range of 2:1 to 20:1