Fire protective compositions and associated methods

Patent metadata

Field	Value
Publication number	US-10745571-B2
Application number	US-201916415739-A
Country	US
Kind code	B2
Filing date	May 17, 2019
Priority date	May 18, 2018
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

Fire protective compositions include colloidal silica solids, clay, a low biopersistence fiber or refractory ceramic fiber, water, and optionally a chelating agent. Methods of using the fire protective compositions include providing a polymeric foam substrate, applying the fire protective composition on the polymeric foam substrate, and allowing the fire protective composition to dry.

First claim

What is claimed is:

1. A fire protective composition consisting of:
about 5 weight percent to about 40 weight percent of colloidal silica solids;
about 0.5 weight percent to about 6 weight percent of a clay;
about 30 weight percent to about 80 weight percent of a low biopersistence fiber;
about 10 weight percent to about 70 weight percent of water; and
greater than about 0 weight percent to about 7 weight percent of a chelating agent.

2. The fire protective composition of claim 1 , wherein the chelating agent comprises ethylenediaminetetraacetic acid (EDTA).

3. The fire protective composition of claim 2 , wherein the EDTA comprises diammonium EDTA.

4. The fire protective composition of claim 1 , wherein the clay comprises smectite clay.

5. The fire protective composition of claim 1 , wherein the low biopersistence fiber comprises a magnesia-silica fiber or a calcia-magnesia-silica fiber.

6. The fire protective composition of claim 1 , wherein the low biopersistence fiber comprises unfiberized particulates.

7. A kit for providing a fire protective composition, the kit consisting of:
(a) a colloidal silica solution;
(b) a clay;
(c) a low biopersistence fiber;
(d) a chelating agent solution; and
(e) instructions on how to mix components (a)-(d).

8. The kit of claim 7 , wherein the chelating agent solution comprises ethylenediaminetetraacetic acid (EDTA).

9. The kit of claim 8 , wherein the EDTA comprises diammonium EDTA.

10. The kit of claim 7 , wherein the clay comprises smectite clay.

11. The kit of claim 7 , wherein the low biopersistence fiber comprises a magnesia-silica fiber or a calcia-magnesia-silica fiber.

12. The kit of claim 7 , wherein the low biopersistence fiber comprises unfiberized particulates.

13. A method for protecting a substrate from fire and excessive heat, comprising:
providing a polymeric foam substrate;
applying the fire protective composition of claim 1 on the polymeric foam substrate,
and

allowing the fire protective composition to dry on the polymeric foam substrate.

14. The method of claim 13 , wherein the polymeric foam substrate comprises polystyrene, polyurethane, polyisocyanurate, phenolic, polyurea, low density polyethylene, high density polyethylene, polyvinylchloride, polypropylene, polytetrafluoroethylene, polyamide, polyimide, polyamideimide, polyester, polyetherketone, polyetheretherketone, polyetherketoneketone, polyvinylfluoride, polyaryl sulfone, polyester amide, polyester imide, polyethersulfone, polyphenylene sulfide, ethylene chlorotrifluoroethylene, polyethylene terephthalate, and acrylic polymers, and combinations thereof.

15. The method of claim 13 , further comprising attaching a foil facing or a glass fiber cloth facing to the polymeric foam substrate before applying the fire protective composition, wherein the fire protective composition is applied directly on the foil facing or the glass fiber cloth facing.

16. The method of claim 15 , wherein the foil facing has a thickness of about 10 to about 500 microns, and the glass fiber cloth facing has a thickness of about 25 to about 1000 microns.

17. The method of claim 13 , wherein the fire protective composition is applied at a coating weight of about 25 g/m 2 to about 800 g/m 2 .

18. A fire protective composition consisting of:
about 5 weight percent to about 40 weight percent of colloidal silica solids;
about 0.5 weight percent to about 6 weight percent of a clay;
about 30 weight percent to about 80 weight percent of a low biopersistence fiber or a refractory ceramic fiber; and
about 10 weight percent to about 70 weight percent of water.

19. The fire protective composition of claim 18 , wherein the clay comprises smectite clay.

20. The fire protective composition of claim 18 , wherein the low biopersistence fiber is present in the fire protective composition and comprises a magnesia-silica fiber or a calcia-magnesia-silica fiber.

21. A kit for providing a fire protective composition, the kit consisting of:
(a) a colloidal silica solution;
(b) a clay;
(c) a low biopersistence fiber or a refractory ceramic fiber; and
(d) instructions on how to mix components (a)-(c).

22. The kit of claim 21 , wherein the clay comprises smectite clay.

23. The kit of claim 21 , wherein the low biopersistence fiber is present in the fire protective composition and comprises a magnesia-silica fiber or a calcia-magnesia-silica fiber.

Assignees

• Unifrax I Llc

Inventors

• Zoitos Bruce K
• Cross Jonathan
• Kelsall Adam
• Cannan Chad D
• Miller Kenneth B
• Lee Gary A
• Beauharnois Mark E
• Keefe Anastasia
• Daniels Iv Donald John

Classifications

• C08J7/05

  Forming flame retardant coatings or fire resistant coatings · CPC title

• C08J7/0423

  with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder · CPC title

• E04B1/94

  against fire ({fire protection of partitions E04B2/7403, E04B2/7409; supporting constructions for ceilings having the capability of expansion in case of fire E04B9/08}; fire-fighting A62C, {e.g. fire prevention or containment A62C2/00}; impregnation of wood or similar materials B27K; {fireproof paints C09D5/18; fireproofing materials C09K21/00; flame-resistant papers D21H5/0002; coverings or linings, e.g. for walls or ceilings, in general E04F13/00}; fireproof doors E06B5/16; {firebreak devices for pipes or the like passing through walls F16L5/04; protection of pipes by means of non-inflammable material F16L57/04}) · CPC title

• C04B2111/28

  Fire resistance, i.e. materials resistant to accidental fires or high temperatures · CPC title

• B32B19/047

  of foam · CPC title