AEROGEL-CONTAINING COMPOSITION AND INSULATION BLANKET PREPARED USING THE SAME

• US 20180009969A1
• Filed: 03/25/2016
• Published: 01/11/2018
• Est. Priority Date: 04/07/2015
• Status: Active Grant

• Current Assignee: Inha University Research and Business, LG Chem Limited (LG Corporation)
• Original Assignee: INHA University, LG Chem Limited (LG Corporation)
• Inventors: KIM, Ye Hon, HWANG, Hae Jin, LEE, Je Kyun, LEE, Kyoung Jin
• Granted Patent: US 10,640,629 B2
• Time in Patent Office: Days
• CPC Class Codes: C01B 33/1585 Dehydration into aerogels
• CPC Class Codes: C01B 33/159 Coating or hydrophobisation
• CPC Class Codes: C08J 2203/14 Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
• CPC Class Codes: C08J 2205/026 Aerogel, i.e. a supercritically dried gel
• CPC Class Codes: C08J 2331/04 Homopolymers or copolymers of vinyl acetate
• CPC Class Codes: C08J 3/075 Macromolecular gels
• CPC Class Codes: C08J 9/14 organic
• CPC Class Codes: C08J 9/141 Hydrocarbons
• CPC Class Codes: C08K 7/26 Silicon- containing compounds
• CPC Class Codes: C08L 23/08 Copolymers of ethene C08L23/16 takes precedence
• CPC Class Codes: C08L 31/06 Homopolymers or copolymers of esters of polycarboxylic acids
• CPC Class Codes: C09D 131/04 Homopolymers or copolymers of vinyl acetate
• CPC Class Codes: C09D 7/61 inorganic
• CPC Class Codes: D06M 11/77 with silicon or compounds thereof with silanes or disilanes D06M11/01
• CPC Class Codes: D06M 15/333 of vinyl acetate; Polyvinylalcohol
• CPC Class Codes: D06M 2400/02 Treating compositions in the form of solgel or aerogel

Abstract

The present disclosure provides an aerogel-containing composition including an aerogel, a water-soluble binder, a foaming agent, and a mixture of water and a polar organic solvent as a solvent, and an insulation blanket prepared using the same. In the aerogel-containing composition, the aerogel is uniformly dispersed in the composition, and when preparing a blanket, an insulation blanket having low thermal conductivity and flexibility of low density is prepared without concern of shrinkage of the substrate for a blanket and detachment of the aerogel during a drying process.

Claims

1. An aerogel-containing composition comprising:

an aerogel;

a water-soluble binder;

a foaming agent; and

a solvent,

wherein the solvent includes water and a polar organic solvent.

2. The aerogel-containing composition of claim 1, wherein the aerogel has porosity of 90% by volume or greater, and tap density of 0.04 g/cm³ to 0.2 g/cm³.

3. The aerogel-containing composition of claim 1, wherein the aerogel has a specific surface area of 700 m²/g or greater, and an average particle diameter of 5 μ

m to 80 μ

m.

4. The aerogel-containing composition of claim 1, wherein the aerogel has thermal conductivity of 0.02 W/mK or less.

5. The aerogel-containing composition of claim 1, wherein the aerogel includes a silica aerogel.

6. The aerogel-containing composition of claim 1, wherein the water-soluble binder includes any one or a mixture of two or more selected from the group consisting of polyvinyl acetate, polyacrylic acid, polyacrylic ester, polyethylene vinyl acetate, styrene acrylic ester resins, styrene butadiene resins, polyvinyl alcohol, polyurethane, cellulose-based resins, starch or copolymers thereof.

7. The aerogel-containing composition of claim 1, wherein the foaming agent includes any one or a mixture of two or more selected from the group consisting of saturated hydrocarbon-based compounds having 1 to 8 carbon atoms and halides thereof.

8. The aerogel-containing composition of claim 1, wherein the polar organic solvent is an alcohol-based solvent.

9. The aerogel-containing composition of claim 1, wherein the polar organic solvent is a primary alcohol-based solvent having 1 to 6 carbon atoms.

10. The aerogel-containing composition of claim 1, wherein the solvent includes the water and the polar organic solvent in a weight ratio of 70:

30 to 10;

90.

11. The aerogel-containing composition of claim 1, further comprising any one, two or more additives selected from the group consisting of a flame retardant, a silane coupling agent, a water repellent or a curing agent.

12. The aerogel-containing composition of claim 1, comprising:

the water-soluble binder in 1 part by weight to 100 parts by weight;

the foaming agent in 10 parts by weight to 1000 parts by weight; and

the solvent in 800 parts by weight to 10000 parts by weight, with respect to 100 parts by weight of the aerogel.

13. The aerogel-containing composition of claim 1, comprising:

the aerogel in 1% by weight to 10% by weight;

the water-soluble binder in 0.1% by weight to 1% by weight;

the foaming agent in 1% by weight to 10% by weight; and

the solvent in 85% by weight to 96% by weight, with respect to a total weight of the aerogel-containing composition,

wherein the aerogel includes a silica aerogel, the water-soluble binder includes polyvinyl acetate, the foaming agent includes a saturated alicyclic hydrocarbon-based compound having 4 to 6 carbon atoms, and the solvent includes water and a primary alcohol-based solvent having 1 to 6 carbon atoms in a weight ratio of 60;

40 to 20;

80.

14. An insulation blanket prepared using the aerogel-containing composition of claim 1, comprising:

a substrate for a blanket; and

an aerogel disposed on at least one surface of and inside the substrate for a blanket.

15. The insulation blanket of claim 14, wherein the substrate for a blanket is surface hydrophobized.

16. The insulation blanket of claim 14, wherein the substrate for a blanket is a textile including fibers having an average diameter of 20 μ

m to 30 μ

m.

17. The insulation blanket of claim 14, which has density of 0.15 g/cm³ or less and thermal conductivity of 30 mW/mK or less.