Inorganic shell, resin composition, and method for making inorganic shell

Patent metadata

Field	Value
Publication number	US-10875984-B2
Application number	US-201715826615-A
Country	US
Kind code	B2
Filing date	Nov 29, 2017
Priority date	Aug 18, 2017
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

An inorganic shell is ball-shaped and hollow, and includes silica and crystalline inorganic powder sintered together. A resin composition has the inorganic shells and the resin composition has certain dieletric characteristics. A method for making the inorganic shell is also provided.

First claim

What is claimed is:

1. An inorganic shell, being hollow, and being sintered with inorganic powder, the inorganic powder comprising silica and crystalline inorganics; a shell thickness of the inorganic shell is in a range from 20 nanometers to 30 nanometers.

2. The inorganic shell of claim 1 , wherein a mass percentage of the silica in the inorganic powder is more than 50%.

3. The inorganic shell of claim 1 , wherein the crystalline inorganic powder is crystalline metal oxide or crystalline inorganic salts.

4. The inorganic shell of claim 3 , wherein the crystalline inorganic powder is aluminum phosphate or titanium dioxide.

5. The inorganic shell of claim 1 , wherein the inorganic shell comprises a surface modification layer on surfaces thereof, the surface modification layer is formed by grafting modifier as organic functional groups on the surfaces thereof.

6. The inorganic shell of claim 5 , wherein the modifier is silane compounds.

7. The inorganic shell of claim 6 , wherein the modifier is vinyltrimethoxy silane, and molecular formula of the modifier is:

8. A resin composition, comprising:
resin material; and
inorganic shells, the inorganic shells being dispersed in the resin material, each inorganic shell being hollow and comprising silica and crystalline inorganic powder sintered together with the silica by a high temperature sintering process; a shell thickness of the inorganic shell is in a range from 20 nanometers to 30 nanometers.

9. The resin composition of claim 8 , wherein the crystalline inorganic powder is crystalline metal oxide or crystalline inorganic salts.

10. The resin composition of claim 9 , wherein the crystalline inorganic powder is aluminum phosphate or titanium dioxide.

11. The resin composition of claim 8 , wherein the inorganic shell comprises a surface modification layer on surfaces thereof, the surface modification layer is formed by grafting modifier as organic functional groups on the surfaces thereof.

12. The resin composition of claim 11 , wherein the modifier is vinyltrimethoxy silane, and molecular formula of the modifier is:

13. A method for making an inorganic shell, comprising:
providing a mold, the mold being made of material that can be volatilized at a certainly temperature;
providing inorganic powder comprising silica and crystalline inorganic powder;
adsorbing the inorganic powder on surface of the mold;
sintering the mold and the inorganic powder, and then, volatilizing the mold to obtain an inorganic shell; a shell thickness of the inorganic shell is in a range from 20 nanometers to 30 nanometers.

14. The method of claim 13 , wherein the mold is made of polymethylmethacrylate.

15. The method of claim 13 , wherein the crystalline inorganic powder is crystalline metal oxide or crystalline inorganic salts.

16. The method of claim 13 , further comprising: grafting modifier as organic functional groups on the surfaces of the inorganic shell, to form a surface modification layer on the surfaces of the inorganic shell.

17. The method of claim 16 , wherein the modifier is vinyltrimethoxy silane, and molecular formula of the modifier is:

18. The method of claim 13 , wherein when sintering the mold and the inorganic powder, a sintering oven temperature is in a range from 750 degrees Celsius to 1200 degrees Celsius.

Assignees

• Zhen Ding Tech Co Ltd

Inventors

• Liang Kuo-Sheng
• Hsiang Shou-Jui
• Hsu Mao-Feng
• Lin Hong-Ping

Classifications

• C04B35/14 Primary

  based on silica · CPC title

• C04B2235/95

  Products characterised by their size, e.g. microceramics · CPC title

• C04B35/62222

  obtaining ceramic coatings (coating of mortars, concrete, artificial or natural stone or ceramics C04B41/45; laminated ceramic products B32B18/00; coating of glass C03C17/00, applying ceramic coatings on silicon for semi-conductor purposes H10W; coating metallic materials C23) · CPC title

• C04B2235/447

  Phosphates or phosphites, e.g. orthophosphate or hypophosphite · CPC title

• C04B38/009

  Porous or hollow ceramic granular materials, e.g. microballoons (C04B18/027, C04B20/002 take precedence) · CPC title