# US 10,501,326 B2 · Silica aerogel-including blanket and method for preparing the same

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- Number: US 10,501,326 B2
- Document ID: US10501326B2
- Status: Granted
- Kind: B2
- Application number: 15/547,970
- Filed: 2016-03-28
- Published: 2018-02-01
- Granted: 2019-12-10
- Earliest claimed: 2015-09-10
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Sung Min Yu; Kyoung Shil Oh; Je Kyun Lee
- Web page: https://patentgrep.com/patent/US10501326B2

## CPC

- C01B 33/1585: {Dehydration into aerogels}
- C01B 33/159: Coating or hydrophobisation
- C01G 23/047: Titanium dioxide
- B01D 11/0203: {with a supercritical fluid}
- C01P 2002/88: by thermal analysis data, e.g. TGA, DTA, DSC
- C01P 2004/04: obtained by TEM, STEM, STM or AFM
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C08G 77/02: Polysilicates
- C08G 77/18: to alkoxy or aryloxy groups
- H10W 40/251: {Organics}
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

The present disclosure provides a silica aerogel-including blanket including a substrate for a blanket; and a silica aerogel and an opacifying agent locating at least one of on a surface of and inside the substrate for a blanket, wherein the opacifying agent is a second particulate with inorganic particles of a first particulate being aggregated, and includes 1 to 5 of the inorganic particles per unit volume of 1 μm3, and a method for preparing the same. The silica aerogel-including blanket according to the present disclosure is capable of exhibiting flame retardancy as well as an excellent insulation property, particularly, an excellent insulation property at high temperatures, by including an opacifying agent having excellent dispersibility and high surface activity through chemical etching.

## Claims

### Claim 1

A silica aerogel-including blanket comprising:
a substrate for a blanket; and
a silica aerogel and an opacifying agent located at least at one of on a surface of the substrate for a blanket and inside the substrate for a blanket,
wherein the opacifying agent is prepared by dispersing inorganic particles into an aqueous basic solution and etching the particles,
wherein the opacifying agent is a second particulate having a structure formed by aggregation of inorganic particles of a first particulate, and includes 1 to 5 of the inorganic particles per unit volume of 1 μm3,
wherein the opacifying agent has an average zeta-potential of −10 mV to −60 mV in water, and
wherein the second particulate has an average particle diameter of 300 nm to 600 nm and the first particulate has an average particle diameter of 100 nm to 300 nm.

### Claim 2 (depends on 1)

The silica aerogel-including blanket of claim 1, wherein the inorganic particle includes any one, or two or more of condensation reactive functional groups selected from the group consisting of hydroxyl groups, alkoxy groups, carboxyl groups and ester groups on a surface of the particle.

### Claim 3 (depends on 1)

The silica aerogel-including blanket of claim 1, wherein the inorganic particle has unevenness on a surface thereof.

### Claim 4 (depends on 1)

The silica aerogel-including blanket of claim 1, wherein the inorganic particle includes any one, or two or more selected from the group consisting of metal oxides, metal carbides, metal nitrides, metal hydroxides, metal salts, carbon-based materials, ceramic particles and mixtures thereof.

### Claim 5 (depends on 1)

The silica aerogel-including blanket of claim 1, wherein the inorganic particle includes any one titanium oxide selected from the group consisting of rutile-type TiO2 and anatase-type TiO2.

### Claim 6 (depends on 1)

The silica aerogel-including blanket of claim 1, wherein the silica aerogel has a three-dimensional network structure with the first particles being bound.

### Claim 7 (depends on 1)

The silica aerogel-including blanket of claim 1, wherein the silica aerogel has a specific surface area of 700 m2/g or greater.

### Claim 8 (depends on 1)

The silica aerogel-including blanket of claim 1, wherein the silica aerogel is a hydrophobic silica aerogel having a carbon content of 8% by weight or greater with respect to a total weight of the silica aerogel.

### Claim 9 (depends on 1)

The silica aerogel-including blanket of claim 1, wherein the substrate for a blanket further includes a surface hydrophobization layer on at least one surface of the substrate.

### Claim 10 (depends on 1)

The silica aerogel-including blanket of claim 1, wherein the opacifying agent chemically binds to the silica aerogel to form an opacifying agent-silica aerogel complex.