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Fugitive color fire retardant composition for aerial application

a fire retardant composition and color technology, applied in fire extinguishers, dental surgery, medical science, etc., can solve the problems of reducing the visibility of these highly colored fugitive compositions, affecting the application of prior art fire retardant compositions, and remained permanently or semi-permanently stained,

Inactive Publication Date: 2001-11-01
ICL PERFORMANCE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0003] More particularly, the invention concerns a fugitive color fire retardant composition, having improved aerial visibility after it is first aerially applied to ground vegetation, but which fades over time and under ambient conditions to another color (hue).

Problems solved by technology

However, certain prior art coloring agents, especially red iron oxide, were very "colorfast", such that the ground and structures (if any) to which the prior art fire retardant compositions were applied, remained permanently or semi-permanently stained.
However, although the fire retardant compositions themselves might be brilliantly colored by fugitive agents, after first application it was often difficult to locate the fire retardant drop zone.
It has been found that the reduced visibility of these highly colored fugitive compositions is somewhat related to the viscosity of the fire retardant compositions themselves.
However, even highly viscous fugitive color compositions are sometimes difficult to visualize from an aircraft after dropping on various kinds of vegetation and under various lighting conditions.

Method used

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  • Fugitive color fire retardant composition for aerial application
  • Fugitive color fire retardant composition for aerial application
  • Fugitive color fire retardant composition for aerial application

Examples

Experimental program
Comparison scheme
Effect test

example ii

[0047] This example illustrates the practice of the invention by the manufacture of so-called dry or powder concentrate compositions. These dry compositions are thereafter mixed with water to form a final diluted fire retardant composition suitable for aerial application. These compositions are manufactured in accordance with the methods disclosed in U.S. Pat. No. 4,176,071. The ingredients in each composition are set forth in Tables C, D and E. Each of these compositions has acceptable aerial visibility and fugitive fading characteristics.

3 TABLE C Wt. % in Wt. % in Final Concentrate Composition FIRE RETARDANT COMPONENTS Ammonium Sulfate 78.20 14.5 Diammonium Phosphate 3.78 0.7 Guar Gum 4.20 0.8 Xanthan Gum 0.11 0.2 Corrosion Inhibitors 1.08 0.20 Spoilage Inhibitor 0.54 0.10 Defoamer / Anti-Oxidant 10.79 2.00 COLORANT COMPONENTS Fugitive Pigment 1.08 0.20 Non-Fugitive Pigment 0.22 0.04 (Red Iron Oxide) LIQUID CARRIER Water none balance 100.00 100.00

[0048]

4 TABLE D Wt. % in Wt. % in F...

example 3

[0050] This example illustrates the practice of the invention in the manufacture of fugitive compositions of the general type disclosed in U.S. Pat. No. 4,983,326. A blended dry powder concentrate is prepared in accordance with Example 4B of the '326 patent. The dry concentrate is mixed with water to form an intermediate low-viscosity liquid concentrate, which is then further diluted to form a high-viscosity final mixed fire retardant composition having improved aerial visibility in comparison to the same compositions without the iron oxide pigment and has acceptable "fugitive" fading characteristics. Table F depicts the weight percentages of the components of the dry concentrate, intermediate liquid or so-called "fluid" concentrate and the final diluted mixed retardant composition.

6TABLE F Dry Liq Final Conc Conc Mix FIRE RETARDANT COMPONENTS Monoammonium phosphate 52.24 24.46 5.62 Diammonium phosphate 34.81 16.30 3.74 guar gum 7.24 3.39 0.78 sodium molybdate 0.19 0.09 0.02 tricalc...

example 4

[0052] The following compositions were prepared in accordance with method described in the U.S. Pat. No. 3,960,735 to Kathleen P. Lacey, except that the colorant of the present invention is substituted for the coloring agents described therein. The ingredients used in preparing the liquid concentrates and the final diluted mixed fire retardant are listed in Table G, H and I.

7TABLE G wt % in liquid wt % in diluted concentrate mixed retardant FIRE RETARDANT COMPONENTS Ammonium Polyphosphate 90.60 20.29 Liquid (Arcadian 11-37-0) Attapulgite Clay 3.50 0.78 (Floridin AA Special) Sodium Ferrocyanide 4.50 1.01 (Wego Technical) COLORANT Fugitive Pigment 1.00 0.22 (Day Glo #122-9180) Non-Fugitive Pigment 0.40 0.09 (Mobay Corp. Bayferrox Red Iron Oxide 130M) LIQUID CARRIER Water none balance TOTAL 100.00 100.00

[0053]

8TABLE H wt % in liquid wt % in diluted concentrate mixed retardant FIRE RETARDANT COMPONENTS Ammonium Polyphosphate 90.70 22.98 Liquid (Simplot 10-34-0) Attapulgite Clay 4.00 1.0...

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PUM

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Abstract

In a fugitive color fire retardant composition, the colorant initially colors the composition to a hue which contrasts with the hue of ground vegetation. A non-fugitive component is included in the colorant, in an amount sufficient to provide improved aerial visibility when the composition is first aerially applied to the vegetation. However, the amount of non-fugitive pigment is less than an amount which would prevent the composition from fading after application to an acceptable neutral hue.

Description

[0001] This application is a continuation application of U.S. Ser. No. 09 / 139,640, filed Jul. 20, 1998, which in turn is a continuation-in-part of our co-pending application, Ser. No. 08 / 492,471, filed Jun. 20, 1995, which was a continuation-in-part of our International Application, PCT / US94 / 08226, filed Nov. 30, 1994.NATURE OF THE INVENTION[0002] This invention relates to fire retardant compositions which are specially adapted for aerial application, to combat or prevent the spread of wildfires.[0003] More particularly, the invention concerns a fugitive color fire retardant composition, having improved aerial visibility after it is first aerially applied to ground vegetation, but which fades over time and under ambient conditions to another color (hue).[0004] In the early 1960's aerial application of fire retardant compositions, to prevent or retard the spread of forest fires, range fires, etc., became very widespread. Typically, these fire retardant compositions contained an elect...

Claims

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Application Information

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IPC IPC(8): A62D1/00
CPCA62D1/0014A62D1/0035
Inventor CROUCH, ROBERT L.BURCHERT, DARLA D.
Owner ICL PERFORMANCE PROD