Hollow particles and use thereof

Patent metadata

Field	Value
Publication number	US-11369935-B2
Application number	US-201716333793-A
Country	US
Kind code	B2
Filing date	Aug 30, 2017
Priority date	Sep 16, 2016
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

Hollow particles having a shell including at least one layer, wherein the at least one layer contains a vinyl-based resin, and contains a phosphorus atom and/or a sulfur atom.

First claim

What is claimed is:

1. Hollow particles comprising:
a shell including at least one layer
that contains a vinyl-based resin and a phosphorus atom,
wherein the phosphorus atom is incorporated into only a part of the at least one layer,
wherein the vinyl-based resin is a polymer obtained by crosslinking a polymer of a radical reactive monomer having at least an epoxy group or an oxetane group, with a crosslinkable monomer, and
wherein said phosphorus atom exhibits a content of 0.2 to 5.00% by mass by fluorescent X-ray analysis.

2. The hollow particles according to claim 1 , wherein when a ratio α (absorbance ratio α: A810/A1720) between absorbance at 810 cm −1 (A810) and absorbance at 1720 cm −1 (A1720) is calculated from an infrared absorption spectrum obtained by measuring said hollow particles by ATR-FTIR, said hollow particles exhibit an absorbance ratio α of 0.015 to 0.50.

3. The hollow particles according to claim 1 , wherein said vinyl-based resin is an organic-inorganic hybrid vinyl-based resin containing a silicon component.

4. The hollow particles according to claim 1 , having an average particle diameter of 10 to 150 nm.

5. The hollow particles according to claim 1 , wherein said hollow particles have a surface treated with a silane-based coupling agent represented by the following general formula (I):

wherein R 1 represents independently a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted alkoxyalkyl group having 2 to 4 carbon atoms, or a substituted or unsubstituted phenyl group; R 2 represents independently a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted alkoxyalkyl group having 2 to 4 carbon atoms, or a substituted or unsubstituted phenyl group; R 3 represents a divalent organic group having 1 to 30 carbon atoms; R 4 represents a hydrogen atom or a methyl group; and m represents an integer of 0 to 2.

6. A dispersion liquid comprising the hollow particles 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. A laminate comprising at least a substrate, and a cured resin layer containing the hollow particles according to claim 1 ,
wherein when subjected to a bend test (cylindrical mandrel method) described in JIS K5600-5-1: 1999, said cured resin layer has such a bending resistance that said cured resin layer begins to crack at a mandrel diameter of 8 mm or less.

10. The hollow particles according to claim 1 , wherein said hollow particles have a hollow ratio of 10 to 90%.

11. The hollow particles according to claim 1 , wherein said at least one layer further contains a sulfur atom, and
wherein said sulfur atom exhibits a content of 0.2 to 5.00% by mass by fluorescent X-ray analysis.

Assignees

• Sekisui Plastics

Inventors

• Katayama Yugo
• Saito Tsuyoshi
• Matsuura Haruhiko
• Kotani Atsushi
• Noda Momoka

Classifications

• C08F8/42

  Introducing metal atoms or metal-containing groups · CPC title

• C08K7/22

  Expanded, porous or hollow particles · CPC title

• C09D201/00

  Coating compositions based on unspecified macromolecular compounds · CPC title

• C08G59/32

  Epoxy compounds containing three or more epoxy groups · CPC title

• B01J13/18 Primary

  In situ polymerisation with all reactants being present in the same phase · CPC title