Fire-fighting foam composition with microfibrous cellulose

Patent metadata

Field	Value
Publication number	US-11771939-B2
Application number	US-202217722978-A
Country	US
Kind code	B2
Filing date	Apr 18, 2022
Priority date	May 14, 2021
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

An aqueous fire-fighting composition includes a surfactant component that includes an anionic surfactant, a zwitterionic surfactant, a nonionic surfactant, or a mixture of any two or more thereof; and a suspension agent comprising microfibrous cellulose. The suspension agent may include a water-soluble oligosaccharide and/or polysaccharide co-agent together with the microfibrous cellulose. The fire-fighting composition may also include one or more of a sugar component, organic solvent and a polysaccharide thickener, and be substantially free of fluorinated additives.

First claim

What is claimed is:

1. A method of fighting a fire, the method comprising:
forming a foam comprising an aqueous firefighting composition; and
applying the foam directly or indirectly to the fire;
wherein the aqueous fire-fighting composition comprises:
a sugar component;
a polysaccharide thickener;
a surfactant component comprising an anionic surfactant, a zwitterionic surfactant, or a mixture of any two or more thereof;
a suspension agent comprising microfibrous cellulose; and
at least about 30 wt. % water;

wherein: one or more components of the aqueous fire-fighting composition is at least partially insoluble in the aqueous fire-fighting composition and wherein the composition is substantially free of non-ionic surfactants.

2. The method of claim 1 , wherein at least about 50 wt. % of the sugar component comprises one or more monosaccharide sugars.

3. The method of claim 1 , wherein the sugar component contains a total of no more than about 10 wt. % disaccharide sugars and oligosaccharides.

4. The method of claim 1 , wherein the sugar component comprises glucose, fructose, mannose, xylose, xylitol, sorbitol, mannitol, or a mixture of any two or more thereof.

5. The method of claim 1 , wherein the surfactant component comprises a betaine and/or sultaine zwitterionic surfactant; and an alkyl sulfate and/or alkyl ether sulfate.

6. The method of claim 1 , wherein the anionic surfactant comprises an aliphatic sulfate surfactant, an aliphatic sulfonate surfactant, an aliphatic succinate salt, an aliphatic ether sulfate surfactant, or a mixture of any two or more thereof.

7. The method of claim 1 , wherein the anionic surfactant comprises a C 8 -C 14 alkyl sulfate, a C 8 -C 14 alkyl sulfonate, C 10 -C 14 alkyl ether sulfate, or a mixture of any two or more thereof.

8. The method of claim 1 , wherein the anionic surfactant comprises an C 8 -C 14 alkyl sulfate, or a mixture of any two or more thereof.

9. The method of claim 1 , wherein the anionic surfactant comprises octyl sulfate salt, decyl sulfate salt, lauryl sulfate salt, or a mixture of any two or more thereof.

10. The method of claim 1 , wherein the composition comprises about 2 to 20 wt. % of the anionic surfactant.

11. The method of claim 1 , wherein the zwitterionic surfactant comprises an aliphatic amidoalkyl betaine, an aliphatic sulfobetaine, an aliphatic amidoalkyl hydroxysultaine, an aliphatic hydroxysultaine, or a mixture of any two or more thereof.

12. The method of claim 1 , wherein the zwitterionic surfactant comprises cocamidopropyl hydroxysultaine.

13. The method of claim 1 , wherein the composition further comprises an organic solvent.

14. The method of claim 1 , wherein the composition further comprises a water-miscible solvent.

15. The method of claim 1 , wherein the microfibrous cellulose comprises a fermentation derived cellulose.

16. The method of claim 1 , wherein the surfactant component comprises the anionic surfactant and the zwitterionic surfactant.

Assignees

• Tyco Fire Products Lp

Inventors

• Monfils Joanna M
• Libal John P
• Bomann Blake H

Classifications

• A62D1/0071 Primary

  Foams · CPC title

• A62C99/0036

  using foam · CPC title

• A62D1/0042 Primary

  "Wet" water, i.e. containing surfactant · CPC title