Aerogel-coated sheet

• US 6,316,092 B1
• Filed: 12/07/1998
• Issued: 11/13/2001
• Est. Priority Date: 10/11/1995
• Status: Expired due to Term

• Current Assignee: Cabot Corporation
• Original Assignee: Hoechst Research & Technology Deutschland GmbH & Co. KG
• Inventors: Schwertfeger, Fritz, Zimmermann, Andreas, Frank, Dierk
• Primary Examiner(s): Copenheaver, Blaine
• Assistant Examiner(s): Paulraj, Christopher
• Application Number:
  US09/051,258
• Time in Patent Office: 1,072 Days
• Field of Search: 428/201, 428/202, 428/204, 428/206, 428/312.2, 428/312.6
• US Class Current: 428/312.6
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/06 with compositions not containing macromolecular substances
• CPC Class Codes: C09D 1/00 Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
• CPC Class Codes: Y10T 428/249967 Inorganic matrix in void-containing component
• CPC Class Codes: Y10T 428/249969 Of silicon-containing material [e.g., glass, etc.]

Abstract

The invention concerns a coated sheet which includes an aerogel layer, a method of manufacturing the coated sheet and its use.

Claims

1. A film comprising a mateiral selected from the group consisting of polyester, cellulose, polyolefins, polystyrenes, polymethyl(meth)acrylates, polyvinylchloride, polyamides and polycarbonates wherein it is coated on at least one surface with an aerogel coating which has been surface-modified via silyation and formed by (a) applying a sol to said at least one side, (b) polycondensing said applied sol and (c) drying.

2. A film as defined in claim 1, wherein SiO₂ aerogels are used in the aerogel coating.

3. A film as defined in claim 1, wherein the aerogels have hydrophobic surface groups.

4. A film as defined in claim 1, wherein the aerogels of the aerogel layer have porosities of greater than 60% and densities of less than 0.6 g/cm³.

5. A film as defined in claim 1, wherein the aerogels have thermal conductivities of less than 40 mW/mK.

6. A film as defined in claim 1, wherein the aerogel coating contains an IR opacifier.

7. A film as defined in claim 1, wherein the aerogel coating contains fibers.

8. A film as defined in claim 1 wherein polyethylene terephathalate or polypropylene is used as film material.

9. A process for manufacturing a coated film as defined in claim 1, wherein a sol is applied to a film and converted to an aerogel coating by polycondensation and drying.

10. A process for manufacturing a coated film as defined in claim 1, wherein an aerogel coating is produced and cemented onto a film.

20. A thermal insulation material which comprises a coated film as defined in claim 1.

11. A film construct comprising a first and a second film, each film separately comprising a material selected from the group consisting of polyester, cellulose, polyolefins, polystyrenes, polymethyl(meth)acrylates, polyvinylchloride, polyamides and polycarbonates wherein a coat that, contains surface-modified by silyation aerogel powder and/or surface-modified by silylation aerogel granulate is arranged between said first and second film to which said coat is fused.

12. A film as defined in claim 11, wherein SiO₂ aerogels are used in the aerogel coat.

13. A film as defined in claim 11, wherein the aerogels have hydrophobic surface groups.

14. A film as defined in claim 11, wherein the aerogels of the aerogel coat have porosities of greater than 60% and densities of less than 0.6 g/cm³.

15. A film as defined in claim 11, wherein the aerogels have thermal conductivities of less than 40 mW/mK.

16. A film as defined in claim 11, wherein the aerogel coat contains an IR opacifier.

17. A film as defined in claim 11, wherein the aerogel coat contains fibers.

18. A film as defined in claim 11, wherein polyethyleneterephthalate or polypropylene is used as film material.

19. A process for manufacturing a coated film as defined in claim 11, wherein the aerogel powder or aerogel granulate coat is applied to a film, a second film is laid thereon, and so fused or cemented to the first film that areas of the aerogel are included.

21. A film comprising a material selected from the group consisting of polyester, cellulose, polyolefins, polystyrenes, polymethyl(meth)acrylates, polyvinylchloride, polyamides and polycarbonates, which is coated on at least one side with an aerogel coating, wherein said aerogel coating is surface-modified via silyation and said coating comprises aerogel powder and/or aerogel granulate.