Aerogel-based material that is super-insulating at atmospheric pressure
US10604642B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2012 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Jun 23, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a solid thermally insulating material, essentially free of phyllosilicates, comprising (a) from 70 to 98% by volume of hydrophobic silica aerogel particles having an intrinsic density between 110 and 210 kg/m, (b) from 0.3 to 12% by volume of an organic binder formed by at least one organic polymer (b1) and at least one surfactant (b2), or by an amphiphilic organic polymer (b3), these volume fractions being determined by image analysis on thin sections of the solid material and being given relative to the total volume of the material, the aerogel particles having a particle size distribution that has at least two maxima, with a first maximum corresponding to an equivalent diameter (d) of less than 200 μm, preferably between 25 μm and 150 μm, and a second maximum corresponding to an equivalent diameter (D) between 400 μm and 10 mm, preferably between 500 μm and 5 mm. It also relates to a thermally insulating product containing at least one layer of this material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.