Granted Patent B2

US 6,852,853 · App. 10/421,149 · Granted Feb 8, 2005

Abstract

Claims (39)

1. A method of preparing a fire retardant composition, adapted for aerial application to wildland fires, the method comprising the steps of:

(a) forming an intermediate concentrate composition comprising:

(i) a fire retardant comprised at least one ammonium polyphosphate; and

(ii) at least one biopolymer having a weight average particle diameter less than about 100 microns; and

(c) diluting said intermediate concentrate with water to form said fire retardant composition wherein said at least one biopolymer is not guar gum.

2. The method of claim 1 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising:

(i) a fire retardant comprised of at least one ammonium polyphosphate;

(ii) at least one biopolymer having a weight average particle diameter less than about 100 microns; and

(iii) at least one additive selected from the group consisting of coloring agents, suspending agents, surfactants, stabilizers, corrosion inhibitors and any combination thereof.

3. The method of claim 2 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising:

(i) a fire retardant comprised at least one ammonium polyphosphate;

(ii) at least one biopolymer having a weight average particle diameter less than about 100 microns; and

(iii) a coloring agent selected from the group consisting of fugitive coloring agents, non-fugitive coloring agents, opacifying pigments and any combination thereof.

4. The method of claim 2 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising:

(i) a fire retardant comprised at least one ammonium polyphosphate;

(ii) at least one biopolymer having a weight average particle diameter less than about 100 microns; and

(iii) at least one suspending agent selected from the group consisting of Attapulgus, Sepiolite, Fuller's earth, Montmorillonite and Kaolin clays.

5. The method of claim 1 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising from about 0.01% by weight to about 5.0% by weight said biopolymer.

6. The method of claim 1 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising about 3.0% by weight said biopolymer.

7. The method of claim 1 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising about 1.0% by weight said biopolymer.

8. The method of claim 1 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising about 0.5% by weight said biopolymer.

9. The method of claim 1 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising:

(i) a fire retardant comprised at least one ammonium polyphosphate; and

(ii) at least one biopolymer having a weight average particle diameter less than about 100 microns, wherein each of said at least one biopolymer is selected from the group consisting of xanthan, welan and rhamsan biopolymers.

10. The method of claim 1 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising:

(i) a fire retardant comprised at least one ammonium polyphosphate; and

(ii) at least one xanthan biopolymer having a weight average particle diameter less than about 100 microns.

11. The method of claim 1 wherein said step of diluting said intermediate concentrate with water to form said fire retardant composition comprises diluting said intermediate concentrate with water such that said fire retardant composition comprises from about 0.00224% by weight to about 1.12% by weight said biopolymer after said dilution step.

12. The method of claim 1 wherein said step of diluting said intermediate concentrate with water to form said fire retardant composition comprises diluting said intermediate concentrate with water such that said fire retardant composition comprises at least about 0.112% by weight said biopolymer after said dilution step.

13. The method of claim 1 wherein said step of diluting said intermediate concentrate with water to form said fire retardant composition comprises diluting said intermediate concentrate with water such that said fire retardant composition comprises about 0.112% by weight said biopolymer after said dilution step.

14. The method of claim 1 wherein said step of diluting said intermediate concentrate with water to form said fire retardant composition comprises diluting said intermediate concentrate with water such that said fire retardant composition comprises at least about 0.672% by weight said biopolymer after said dilution step.

15. The method of claim 1 wherein said step of diluting said intermediate concentrate with water to form said fire retardant composition comprises diluting said intermediate concentrate with water such that said fire retardant composition comprises at least about 0.224% by weight said biopolymer after said dilution step.

16. The method of claim 1 wherein said step of forming an intermediate concentrate composition comprises forming an intermediate concentrate composition comprising at least about 0.5% by weight said biopolymer.

17. A method of preparing a fire retardant composition, adapted for aerial application to wildland fires, the method comprising the steps of:

(a) forming an intermediate concentrate composition comprising:

(i) a fire retardant comprised at least one ammonium polyphosphate; and

(ii) a xanthan biopolymer having a weight average particle diameter of less than about 100 microns;

wherein said intermediate concentrate composition comprises from about 0.01% by weight to about 5.0% by weight said xanthan biopolymer; and

(b) diluting said intermediate concentrate with water to form said fire retardant composition.

Assignments (11)