Sol composition, aerogel composite, support member provided with aerogel composite, and heat insulator

Patent metadata

Field	Value
Publication number	US-10995184-B2
Application number	US-201716087408-A
Country	US
Kind code	B2
Filing date	Mar 21, 2017
Priority date	Mar 25, 2016
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

The present invention relates to a sol composition for forming an aerogel composite, wherein the sol composition is a sol composition with a sufficient pot life for forming an aerogel composite superior in thermal insulation and flexibility, and comprises: at least one selected from the group consisting of a silicon compound having a hydrolyzable functional group or a condensable functional group and a hydrolysis product of the silicon compound having a hydrolyzable functional group; and a silica particle having an average primary particle diameter of 5 to 300 nm or a specific surface area of 10 to 600 m2/g.

First claim

The invention claimed is:

1. A sol composition for forming an aerogel composite, the sol composition comprising:
at least one silicon compound selected from the group consisting of a silicon compound having a hydrolyzable functional group or a condensable functional group and a hydrolysis product of the silicon compound having a hydrolyzable functional group, and at least one polysiloxane compound having a structure represented by the following formula (B):

wherein R 1b represents an alkyl group, an alkoxy group, or an aryl group; R 2b and R 3b each independently represent an alkoxy group; R 4b and R 5b each independently represent an alkyl group or an aryl group; and m represents an integer of 1 to 50; and
a silica particle having an average primary particle diameter of 5 to 300 nm, or having a specific surface area of 10 to 600 m 2 /g.

2. An aerogel composite as a dried product of a wet gel, wherein the wet gel is a condensate of the sol composition according to claim 1 .

3. An aerogel composite comprising:
an aerogel component; and
a silica particle having an average primary particle diameter of 5 to 300 nm, or having a specific surface area of 10 to 600 m 2 /g,
wherein the aerogel composite has a ladder-type structure represented by the following formula (3):

wherein R 5 , R 6 , R 7 , and R 8 each independently represent an alkyl group or an aryl group; a and c each independently represent an integer of 1 to 3000; and b represents an integer of 1 to 50.

4. The aerogel composite according to claim 3 , having:
a three-dimensional network skeleton formed of the aerogel component and the silica particle; and
a pore.

5. The aerogel composite according to claim 2 , wherein the silica particle is an amorphous silica particle.

6. The aerogel composite according to claim 2 , having a ladder-type structure including struts and a bridge, wherein the bridge has a structure represented by the following formula (2):

wherein R 5 and R 6 each independently represent an alkyl group or an aryl group; and b represents an integer of 1 to 50.

7. The aerogel composite according to claim 6 , having a ladder-type structure represented by the following formula (3):

wherein R 5 , R 6 , R 7 , and R 8 each independently represent an alkyl group or an aryl group; a and c each independently represent an integer of 1 to 3000; and b represents an integer of 1 to 50.

8. A support member provided with an aerogel composite, the support member comprising:
the aerogel composite according to claim 2 ; and
a support member supporting the aerogel composite.

9. A heat insulator comprising the aerogel composite according to claim 2 .

10. The aerogel composite according to claim 3 , wherein the silica particle is an amorphous silica particle.

11. A support member provided with an aerogel composite, the support member comprising:
the aerogel composite according to claim 3 ; and
a support member supporting the aerogel composite.

12. A heat insulator comprising the aerogel composite according to claim 3 .

13. The aerogel composite according to claim 3 , wherein the silica particle has an average primary particle diameter of 5 to 300 nm and a specific surface area of 10 to 600 m 2 /g.

14. The aerogel composite according to claim 3 , wherein the silica particle has an average primary particle diameter of 7 to 200 nm.

15. The aerogel composite according to claim 3 , wherein the silica particle has a specific surface area of 20 to 300 m 2 /g.

16. The aerogel composite according to claim 3 , wherein the silica particle has a specific surface area of 30 to 250 m 2 /g.

17. The sol composition according to claim 1 , wherein the silica particle has an average primary particle diameter of 5 to 300 nm and a specific surface area of 10 to 600 m 2 /g.

18. The sol composition according to claim 1 , wherein the silica particle has an average primary particle diameter of 7 to 200 nm.

19. The sol composition according to claim 1 , wherein the silica particle has a specific surface area of 20 to 300 m 2 /g.

20. The sol composition according to claim 1 , wherein the silica particle has a specific surface area of 30 to 250 m 2 /g.

Assignees

• Hitachi Chemical Co Ltd
• Show A Denko Mat Co Ltd

Inventors

• IWANAGA Kouta
• Kotake Tomohiko
• Makino Tatsuya
• Miyatake Masato
• Takayasu Satoshi

Classifications

• C08L83/04 Primary

  Polysiloxanes · CPC title

• C08J2383/10

  Block- or graft-copolymers containing polysiloxane sequences · CPC title

• C08J2383/04

  Polysiloxanes · CPC title

• C08J2205/026

  Aerogel, i.e. a supercritically dried gel · CPC title

• C08J9/28

  by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum · CPC title