Wet blanket

Patent metadata

Field	Value
Publication number	US-9434656-B2
Application number	US-201314080107-A
Country	US
Kind code	B2
Filing date	Nov 14, 2013
Priority date	Mar 30, 2011
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

A wet blanket obtained by impregnating a blanket including bio-soluble inorganic fibers with a colloidal silica liquid. A cured blanket obtained by curing the wet blanket.

First claim

The invention claimed is:

1. A method of applying a wet blanket of bio-soluble inorganic fibers to a surface, said method comprising:
providing a wet blanket comprising bio-soluble inorganic fibers having a physiological saline dissolution ratio of 1% or more, said wet blanket being impregnated with a colloidal silica liquid, and a solvent content of about 15 wt % to about 75 wt %;
storing said wet blanket in a sealed bag;
then removing said wet blanket from the bag and applying it while still wet, to a surface; and
then curing the blanket by heating and. drying same, in situ, on said surface;
wherein the biosoluble inorganic fibers comprise about 50 wt % to about 82 wt % of total SiO 2 , ZrO 2 , Al 2 O 3 and TiO 2 , and about 18 wt % to about 50 wt % of total alkali metal oxides and alkaline earth metal oxides.

2. The method according to claim 1 , wherein the colloidal silica is acidic cationic colloidal silica.

3. The method according to claim 1 , wherein the colloidal silica is acidic anionic colloidal silica.

4. The method according to claim 2 , wherein the colloidal silica liquid has a pH of about 2 to about 6.

5. The method according to claim 3 , wherein the colloidal silica liquid has a pH of about 2 to about 6.

6. The method according to claim 1 , wherein the colloidal silica is alkaline anionic colloidal silica.

7. The method according to claim 6 , wherein the colloidal silica liquid has a pH of about 8 to about 11.

8. The method according to claim 1 , wherein the wet blanket comprises colloidal silica in an amount of about 10 parts by weight to about 200 parts by weight in terms of solid matter relative to 100 parts by weight of the bio-soluble inorganic fibers.

9. The method according to claim 1 , wherein the bag is a plastic bag.

10. The method according to claim 1 , wherein the wet blanket is stored for a duration of at least one month.

11. A method of applying a wet blanket of bio-soluble inorganic fibers to a surface, said method comprising:
providing a wet blanket comprising bio-soluble inorganic fibers having a physiological saline dissolution ratio of 1% or more, said we blanket being impregnated with a colloidal silica liquid, and a solvent content of about 15 wt % to about 75 wt %;
storing said wet blanket in a sealed bag;
then removing said wet blanket from the bag and applying it while still wet to a surface; and
then curing the blanket by heating and drying same, in situ, on said surface;
wherein the bio-soluble inorganic fibers comprise about 66 wt % to about 82 wt % of SiO 2 , about 10 wt % to about 33 wt % of CaO, about 1 wt % or less of MgO, and less than about 3 wt % of Al 2 O 3 .

12. The method according to claim 11 , wherein the colloidal silica is acidic cationic colloidal silica.

13. The method according to claim 11 , wherein the colloidal silica is acidic anionic colloidal silica.

14. The method according to claim 11 , wherein the colloidal silica is alkaline anionic colloidal silica.

15. The method according to claim 11 , wherein the wet blanket comprises colloidal silica in an amount of about 10 parts by weight to about 200 parts by weight in terms of solid matter relative to 100 parts by weight of the bio-soluble inorganic fibers.

16. A method of applying a wet blanket of bio-soluble inorganic fibers to a surface, said method comprising:
providing a wet blanket comprising bio-soluble inorganic fibers having as physiological saline dissolution ratio of 1% or more, said wet blanket being impregnated with a colloidal silica liquid, and a solvent content of about 15 wt % to about 75 wt %;
storing said wet blanket in a sealed bag;
then removing said wet blanket from the bag and applying it while still wet to a surface; and
then curing the blanket by heating and drying same, in situ, on said surface:
wherein the bio-soluble inorganic fibers comprise about 66 wt % to about 82 wt % of SiO 2 , about 1 wt % to about 9 wt % of CaO, about 10 wt % to about 30 wt % of MgO, and less than 3 wt % of Al 2 O 3 .

17. The method according to claim 16 , wherein the colloidal silica is acidic cationic colloidal silica.

18. The method according to claim 16 , wherein the colloidal silica is acidic anionic colloidal silica.

19. The method according to claim 16 , wherein the colloidal silica is alkaline anionic colloidal silica.

20. The method according to claim 16 , wherein the wet blanket comprises colloidal silica in an amount of about 10 parts by weight to about 200 parts by weight in terms of solid matter relative to 100 parts by weight of the bio-soluble inorganic fibers.

Assignees

• Nichias Corp

Inventors

• Ishihara Tetsuya
• Mihara Tetsuya
• Yonaiyama Ken
• Kishiki Tomohiko

Classifications

• C04B2235/3418

  Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint · CPC title

• C04B41/5089

  Silica sols, alkyl, ammonium or alkali metal silicate cements · CPC title

• Y10T442/2631

  Coating or impregnation provides heat or fire protection · CPC title

• C04B35/6224

  Fibres based on silica · CPC title

• C03C2213/02

  Biodegradable glass fibres · CPC title