Fire resistant glazings

Patent metadata

Field	Value
Publication number	US-9346962-B2
Application number	US-201313261945-A
Country	US
Kind code	B2
Filing date	Feb 27, 2013
Priority date	Feb 29, 2012
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

An aqueous mixture for the production of fire resistant glazings comprising: at least one alkali metal silicate, at least one glass, glass-ceramic and/or ceramic additive, and water, wherein the at least one glass, glass-ceramic and/or ceramic additive has at least one boron containing moiety directly or indirectly attached to a surface thereof by covalent or ionic bonding.

First claim

The invention claimed is:

1. An aqueous mixture for the production of fire resistant glazings comprising:
at least one alkali metal silicate,
at least one glass, glass-ceramic and/or ceramic additive, and water,

wherein the at least one glass, glass-ceramic and/or ceramic additive has at least one boron containing moiety directly or indirectly attached to a surface thereof by covalent or ionic bonding, and wherein the concentration of the at least one additive in the mixture is at least 0.00005% by weight but at most 0.1% by weight.

2. The mixture according to claim 1 , wherein said moiety is selected from the group consisting of boroxols, boron oxides, and their salts and derivatives.

3. The mixture according to claim 2 , wherein said moiety is selected from the group consisting of —B(OH)—, —B(OH)2, —B(O—)—, —B(O—)2, —B(O—)—OH, —B(OLi)—, —B(OLi)2, —B(OLi)—OH, —B(OSiR3)—, —B(OSiR3)2, and —B(OSiR3)—OH, where R represents any suitable functional group.

4. The mixture according to claim 2 , wherein said boron containing moiety also contains lithium.

5. The mixture according to claim 1 , wherein the additive is in the form of at least one particle, wherein at least 70% but at most 90% by weight of the total weight of particles of the additive comprises particles with a volume-based particle size (where the size of a given particle equals the diameter of a sphere that has the same volume as the given particle) of from 1 to 7 μm.

6. The mixture according to claim 1 , wherein the at least one additive comprises particles with an average volume-based particle size (where the size of a given particle equals the diameter of a sphere that has the same volume as the given particle) of at least 3.0 μm but preferably at most 6.0 μm.

7. The mixture according to claim 1 , wherein the concentration of the at least one additive in the mixture is at least 0.0001% by weight but at most 0.01% by weight.

8. The mixture according to claim 1 , wherein the molar ratio of SiO2:M2O of the at least one alkali metal silicate in the mixture, where M represents an alkali metal cation, is in the range 2.5:1 to 4.0:1.

9. The mixture according to claim 1 , wherein the mixture or material further comprises at least one polyol, wherein the concentration of the polyol in the mixture is at least 10% by weight but at most 25% by weight.

10. A transparent intumescent material for the production of fire resistant glazings comprising:
at least one alkali metal silicate,
at least one glass, glass-ceramic and/or ceramic additive, and water,

wherein the at least one glass, glass-ceramic and/or ceramic additive has at least one boron containing moiety directly or indirectly attached to a surface thereof by covalent or ionic bonding, and wherein the concentration of the at least one additive in the material is at least 0.000075% by weight but at most 0.15% by weight.

11. The material according to claim 10 , wherein said moiety is selected from the group consisting of boroxols, boron oxides, and their salts and derivatives.

12. The material according to claim 11 , wherein said moiety is selected from the group consisting of —B(OH)—, —B(OH)2, —B(O—)—, —B(O—)2, —B(O—)—OH, —B(OLi)—, —B(OLi)2, —B(OLi)—OH, —B(OSiR3)—, —B(OSiR3)2, and —B(OSiR3)—OH, where R represents any suitable functional group.

13. The material according to claim 11 , wherein the molar ratio of SiO2:M2O of the at least one alkali metal silicate in the material, where M represents an alkali metal cation, is in the range 2.5:1 to 4.0:1.

14. The material according to claim 11 , wherein the material further comprises at least one polyol, wherein the concentration of the polyol in the material is at least 17% by weight but at most 30% by weight.

15. The material according to claim 11 , comprising a water content of at least 20% by weight but at most 30% by weight.

16. A fire resistant glazing comprising at least one layer of an intumescent material according to claim 11 attached to at least one glass sheet.

17. A fire resistant glazing assembly comprising at least one fire resistant glazing according to claim 16 attached to a frame.

18. A method of preparing a material according to claim 11 , comprising: drying and/or curing an aqueous mixture comprising:
at least one alkali metal silicate,
at least one glass, glass-ceramic and/or ceramic additive, and water,

wherein the at least one glass, glass-ceramic and/or ceramic additive has at least one boron containing moiety directly or indirectly attached to a surface thereof by covalent or ionic bonding.

19. A method of preparing a fire resistant glazing according to claim 11 comprising: drying and/or curing an aqueous mixture comprising:
at least one alkali metal silicate,
at least one glass, glass-ceramic and/or ceramic additive, and water,

wherein the at least one glass, glass-ceramic and/or ceramic additive has at least one boron containing moiety directly or indirectly attached to a surface thereof by covalent or ionic bonding upon at least one glass sheet.

20. The material according to claim 10 , wherein said boron containing moiety also contains lithium.

21. The material according to claim 10 , wherein the additive is in the form of at least one particle, wherein at least 70% but at most 90% by weight of the total weight of particles of the additive comprises particles with a volume-based particle size (where the size of a given particle equals the diameter of a sphere that has the same volume as the given particle) of from 1 to 7 μm.

22. The material according to 10 , wherein the at least one additive comprises particles with an average volume-based particle size (where the size of a given particle equals the diameter of a sphere that has the same volume as the given particle) of at least 3.0 μm but preferably at most 6.0 μm.

23. The material according to claim 10 , wherein the concentration of the at least one additive in the material is at least 0.00015% by weight but at most 0.015% by weight.

Assignees

• Pilkington Group Ltd

Inventors

• Holden David William
• Bond Stephen Ian
• Varma Karikath Sukumar

Classifications

• C03C17/25

  by deposition from the liquid phase · CPC title

• C04B2111/00612

  as one or more layers of a layered structure · CPC title

• C04B28/26

  Silicates of the alkali metals · CPC title

• C03C2217/475

  Inorganic materials · CPC title

• C04B20/1066

  Oxides, Hydroxides · CPC title