Thermal insulation material comprising partially oxidized graphite oxide particles

Patent metadata

Field	Value
Publication number	US-12227937-B2
Application number	US-201917052535-A
Country	US
Kind code	B2
Filing date	Apr 30, 2019
Priority date	May 4, 2018
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

The present invention relates to a thermal insulation material comprising graphite oxide particles, and also to the use of partially oxidized graphite oxide particles as an opacifying agent in a thermal insulation material.

First claim

The invention claimed is:

1. A thermal insulation material comprising partially oxidized graphite oxide particles, wherein said thermal insulation material is a fibrous insulation material further comprising mineral fibers in the form of a mat of fibers, a fiber panel, or blowing wool.

2. The thermal insulation material as claimed in claim 1 , wherein the partially oxidized graphite oxide particles exhibit an extinction coefficient of greater than 5000 m 2 /kg.

3. The thermal insulation material as claimed in claim 1 , wherein the graphite oxide particles exhibit an oxidation ratio (A2+A3+A4)/(A1+A2+A3+A4) of from 6% to 50%, wherein A1, A2, A3, and A4 respectively correspond to the areas of peaks C1, C2, C3, and C4 resulting from a deconvolution of an X-ray photoelectron spectroscopy (XPS) spectrum of the carbon C1s by taking into consideration the contribution of four peaks: CI at 284 eV. C2 at 286.5 eV, C3 at 288.3 eV and C4 at 290.5 eV; using Gaussian functions for the peaks C2, C3 and C4 and an asymmetric peak with a full width at half maximum of 0.8 eV for the peak C1.

4. The thermal insulation material as claimed in claim 3 , wherein the graphite oxide particles exhibit a ratio A2/(A2+A3+A4) of at least 15.0%.

5. The thermal insulation material as claimed in claim 1 , wherein said thermal insulation material is a fibrous insulation material further comprising mineral fibers in the form of a mat of fibers.

6. The thermal insulation material as claimed in claim 1 , wherein said thermal insulation material is a fibrous insulation material further comprising mineral fibers in the form of a fiber panel.

7. The thermal insulation material as claimed in claim 1 , wherein said thermal insulation material comprises from 1% to 100% by weight of graphite oxide particles, with respect to the weight of mineral fibers.

8. The thermal insulation material as claimed in claim 1 , wherein said thermal insulation material is a fibrous insulation material further comprising mineral fibers in the form of blowing wool.

9. The thermal insulation material as claimed in claim 3 , wherein the graphite oxide particles exhibit an oxidation ratio (A2+A3+A4)/(A1+A2+A3+A4) of from 9% to 30%.

10. The thermal insulation material as claimed in claim 3 , wherein the graphite oxide particles exhibit a ratio A2/(A2+A3+A4) of at least 18.0%.

11. The thermal insulation material as claimed in claim 1 , wherein the partially oxidized graphite oxide particles exhibit an extinction coefficient of greater than 5000 m 2 /kg and less than 30,000 m 2 /kg.

12. The thermal insulation material as claimed in claim 1 , wherein the partially oxidized graphite oxide particles exhibit an extinction coefficient of greater than 7000 m 2 /kg and less than 25,000 m 2 /kg.

13. The thermal insulation material as claimed in claim 1 , wherein the partially oxidized graphite oxide particles exhibit an extinction coefficient of greater than 13,000 m 2 /kg and less than 25,000 m 2 /kg.

14. The thermal insulation material as claimed in claim 3 , wherein the graphite oxide particles exhibit a ratio A2/(A2+A3+A4) of 15.0%-60%.

15. The thermal insulation material as claimed in claim 1 , wherein said thermal insulation material comprises from 3% to 100% by weight of graphite oxide particles, with respect to the weight of mineral fibers.

16. The thermal insulation material as claimed in claim 1 , wherein said thermal insulation material comprises from 20% to 100% by weight of graphite oxide particles, with respect to the weight of mineral fibers.

17. The thermal insulation material as claimed in claim 1 , wherein said thermal insulation material comprises from 60% to 100% by weight of graphite oxide particles, with respect to the weight of mineral fibers.

Assignees

• Saint Gobain Isover

Inventors

• Azevedo Joël
• Grigorova-Moutiers Veneta

Classifications

• E04B2001/742

  Use of special materials; Materials having special structures or shape · CPC title

• E04B1/78

  Heat insulating elements {(E04B1/7662 takes precedence)} · CPC title

• C08J2325/06

  Polystyrene · CPC title

• C08J9/16

  Making expandable particles · CPC title

• C08J9/0095

  Mixtures of at least two compounding ingredients belonging to different one-dot groups · CPC title