Hollow particles and use of same

Patent metadata

Field	Value
Publication number	US-11220585-B2
Application number	US-201616086472-A
Country	US
Kind code	B2
Filing date	Jul 7, 2016
Priority date	Mar 22, 2016
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

Hollow particles each having a shell composed of at least one layer, wherein the at least one layer contains a nitrogen atom-containing resin having a refractive index of 1.57 or less.

First claim

What is claimed is:

1. Hollow particles each having a shell composed of at least one layer, wherein the at least one layer contains a nitrogen atom-containing resin having a refractive index of 1.57 or less;
wherein the nitrogen atom-containing resin is an organic-inorganic hybrid resin containing a silicon component;
wherein the nitrogen atom-containing resin is a vinyl-based resin;
wherein, after the shell is prepared, the shell is surface treated with a compound having at least one anionic group such that the compound having at least one anionic group reacts with the nitrogen atom-containing resin of the shell.

2. The hollow particles according to claim 1 , wherein the nitrogen atom-containing resin has an abundance ratio N of a nitrogen atom and an abundance ratio C of a carbon atom satisfying a relationship of 0.03≤N/C≤0.2 in measurement by XPS.

3. The hollow particles according to claim 1 , which have an average particle diameter of 10 to 150 nm.

4. The hollow particles according to claim 1 , wherein the nitrogen atom-containing resin is a nitrogen atom-containing vinyl-based resin composed of a vinyl-based monomer.

5. The hollow particles according to claim 1 , wherein the compound having an anionic group is selected from a carboxylic acid compound, a sulfonic acid compound, and a phosphoric acid ester compound.

6. A dispersion comprising the hollow particles as defined according to claim 1 .

7. A coating agent comprising the hollow particles according to claim 1 .

8. A heat-insulating film comprising the hollow particles according to claim 1 .

9. The heat-insulating film according to claim 8 , wherein the heat-insulating film has a reflectance of at most 7.1%.

10. Hollow particles each having a shell composed of at least one layer, wherein the at least one layer contains a nitrogen atom-containing resin having a refractive index of 1.57 or less;
wherein, after the shell is prepared, the shell is surface treated with a compound having at least one anionic group such that the compound having at least one anionic group reacts with the nitrogen atom-containing resin of the shell; and
wherein the compound having an anionic group is at least one selected from the group consisting of a sulfonic acid compound and a phosphoric acid ester compound.

11. The hollow particles according to claim 10 , wherein the nitrogen atom-containing resin has an abundance ratio N of a nitrogen atom and an abundance ratio C of a carbon atom satisfying a relationship of 0.03≤N/C≤0.2 in measurement by XPS.

12. The hollow particles according to claim 10 , wherein the nitrogen atom-containing resin is an organic-inorganic hybrid resin containing a silicon component.

13. The hollow particles according to claim 10 , which have an average particle diameter of 10 to 150 nm.

14. The hollow particles according to claim 10 , wherein the nitrogen atom-containing resin is a nitrogen atom-containing vinyl-based resin composed of a vinyl-based monomer.

15. A dispersion comprising the hollow particles according to claim 10 .

16. A coating agent comprising the hollow particles according to claim 10 .

17. A heat-insulating film comprising the hollow particles according to claim 10 .

18. The heat-insulating film according to claim 17 , wherein the heat-insulating film has a reflectance of at most 7.1%.

19. The hollow particles according to claim 10 , wherein the nitrogen atom-containing resin is a polymer derived from a polyamine-based compound.

Assignees

• Sekisui Plastics

Inventors

• Katayama Yugo
• Matsuura Haruhiko

Classifications

• C09D7/70

  characterised by shape, e.g. fibres, flakes or microspheres · CPC title

• C09D7/68

  Particle size between 100-1000 nm · CPC title

• C09D7/67

  Particle size smaller than 100 nm · CPC title

• C09D7/65

  macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C08J9/32

  from compositions containing microballoons, e.g. syntactic foams · CPC title