Granted Patent B2

US 12,722,355 · App. 18/181,342 · Granted Sep 1, 2026

Inventors: Reaz Ahmed Chowdhury (Middleton, WI); Mohammad Arifuzzaman (Middleton, WI); Kellen Kitzman (Middleton, WI); Kari B. Myli (Sauk City, WI)

Assignee: Cardinal CG Company

B32B5/18B32B17/066C01B33/1546C01B33/155C01B33/1585B32B2250/40B32B2266/057B32B2266/126B32B2307/304B32B2307/414B32B2419/00C01P2006/32C01P2006/60

Abstract

Claims (41)

1 . A method of making silica wet gel comprising the steps of:

preparing a first solution by mixing methyl silicate 51 and methanol, wherein the first solution consists essentially of the methyl silicate 51 and the methanol, and wherein the methyl silicate 51 has a weight percent of greater than or equal to 15% and less than or equal to 30% and the methanol has a weight percent of greater than or equal to 60% and less than or equal to 90%;

preparing a second solution by mixing ammonium hydroxide and water, wherein the second solution consists essentially of the ammonium hydroxide and the water, and wherein the ammonium hydroxide has a weight percent of greater than or equal to 0.5% and less than or equal to 1% and the water has a weight percent of greater than or equal to 99% and less than 100%;

mixing the first solution and the second solution together to form a precursor material; and

allowing components in the precursor material to react to form silica wet gel.

2 . The method of claim 1 wherein the precursor material consists essentially of:

methyl silicate 51 at a weight percent of greater than or equal to 15% and less than or equal to 24%;

methanol at a weight percent of greater than or equal to 60% and less than or equal to 68%;

water at a weight percent of greater than or equal to 15% and less than or equal to 17%; and

ammonium hydroxide at a weight percent of greater than or equal to 0.08% and less than or equal to 0.2%.

3 . The method of claim 2 wherein the precursor material consists essentially of:

methyl silicate 51 at a weight percent of greater than or equal to 15.28% and less than or equal to 19%;

methanol at a weight percent of greater than or equal to 65.16% and less than or equal to 68.52%;

water at a weight percent of greater than or equal to 15.68% and less than or equal to 16.04%; and

ammonium hydroxide at a weight percent of greater than or equal to 0.15% and less than or equal to 0.17%.

4 . The method of claim 1 wherein the precursor material has a weight percent ratio of the methyl silicate 51:water of between 0.25:1 and 2:1.

5 . The method of claim 4 wherein the weight percent ratio of the methyl silicate 51:water for the precursor material is between 0.5:1 and 1:1.

6 . A method of making a silica wet gel comprising the steps of:

preparing a first solution by mixing methyl silicate 51 and methanol;

preparing a second solution by mixing ammonium hydroxide and water;

mixing the first solution and the second solution together to form a precursor material, such that the precursor material consists essentially of:

methyl silicate 51 at a weight percent of greater than or equal to 15% and less than or equal to 24%;

methanol at a weight percent of greater than or equal to 60% and less than or equal to 68%;

water at a weight percent of greater than or equal to 15% and less than or equal to 17%; and

ammonium hydroxide at a weight percent of greater than or equal to 0.08% and less than or equal to 0.2%; and

allowing components in the precursor material to react to form the silica wet gel.

7 . The method of claim 6 wherein the precursor material consists essentially of:

methyl silicate 51 at a weight percent of greater than or equal to 15.28% and less than or equal to 19%;

methanol at a weight percent of greater than or equal to 65.16% and less than or equal to 68.52%;

water at a weight percent of greater than or equal to 15.68% and less than or equal to 16.04%; and

ammonium hydroxide at a weight percent of greater than or equal to 0.15% and less than or equal to 0.17%.

8 . The method of claim 6 wherein the precursor material has a weight percent ratio of the methyl silicate 51:water of between 0.25:1 and 2:1.

9 . The method of claim 8 wherein the weight percent ratio of the methyl silicate 51:water for the precursor material is between 0.5:1 and 1:1.

10 . The method of claim 1 further comprising drying the silica wet gel to form silica aerogel in the form of an aerogel sheet having a thickness in a range of from 1.5 mm to 15 mm, and adhering the aerogel sheet to a surface of a glass sheet.

11 . The method of claim 10 wherein the glass sheet is part of a window.

12 . The method of claim 1 further comprising drying the silica wet gel to form silica aerogel in the form of an aerogel sheet having a thickness in a range of from 1.5 mm to 15 mm, and assembling the aerogel sheet together with first and second glass sheets to form an insulating glazing unit.

13 . The method of claim 1 wherein the precursor material is devoid of N,N-dimethylformamide.

14 . The method of claim 6 further comprising drying the silica wet gel to form silica aerogel in the form of an aerogel sheet having a thickness in a range of from 1.5 mm to 15 mm, and adhering the aerogel sheet to a surface of a glass sheet.

15 . The method of claim 14 wherein the glass sheet is part of a window.

16 . The method of claim 6 further comprising drying the silica wet gel to form silica aerogel in the form of an aerogel sheet having a thickness in a range of from 1.5 mm to 15 mm, and assembling the aerogel sheet together with first and second glass sheets to form an insulating glazing unit.

17 . The method of claim 6 wherein the precursor material is devoid of N,N-dimethylformamide.

Assignments (1)

Continuity (2)

References Cited (217)