Storage stable liquid fugitive colored fire-retardant concentrates
This disclosure relates to fugitive color systems and storage-stable fugitive colored liquid long-term fire retardant compositions comprising a fugitive color system. The fugitive color system comprises a fugitive color pigment. In particular, disclosed herein is the identification of fugitive color pigments exhibiting hydrophilic or diminished hydrophobic tendencies. And, in certain aspects, the fugitive color pigment is fluorescent.
1. A liquid fire-retardant concentrate, the concentrate comprising a liquid fire-retardant component and an insoluble phase comprising a fugitive color system, the fugitive color system comprising a fugitive pigment and a water insoluble opaque material, wherein:
the fugitive pigment is formaldehyde-free and comprises a fluorescent dye encapsulated within a polymeric material and is characterized by a surface free energy of at least about 45 and a polar component value of at least about 20; and
the liquid fire-retardant concentrate exhibits a substantially constant storage stability for at least 7 days.
2. The liquid fire-retardant concentrate of claim 1 wherein the substantially constant storage stability is exhibited under static storage conditions and at a temperature of up to 120° F./49° C.
3. The liquid fire-retardant concentrate of claim 1 wherein the substantially constant stability is indicated by an increase in Nephelometric Turbidibity Units (NTU) of no more than about 25%, for a plurality of diluted concentrate samples tested after storage for 7 days.
4. The liquid fire-retardant concentrate of claim 1 wherein the substantially constant storage stability of the concentrate is indicated by a standard deviation of Nephelometric Turbidibity Units (NTU) of less than about 25%, for a plurality of diluted concentrate samples tested after storage for 7 days.
5. The liquid fire-retardant concentrate of claim 1 wherein the liquid fire-retardant concentrate exhibits a substantially constant storage stability for 14 days.
6. The liquid fire-retardant concentrate of claim 5 wherein the substantially constant stability is indicated by an increase in Nephelometric Turbidibity Units (NTU) of no more than about 25%, for a plurality of diluted concentrate samples tested after storage for 14 days.
7. The liquid fire-retardant concentrate of claim 5 wherein the substantially constant storage stability of the concentrate is indicated by a standard deviation of Nephelometric Turbidibity Units (NTU) of less than about 25%, for a plurality of diluted concentrate samples tested after storage for 14 days.
8. The liquid fire-retardant concentrate of claim 1 wherein the fugitive pigment is fluorescent.
9. The liquid fire-retardant concentrate of claim 1 wherein the liquid fire-retardant component is selected from the group consisting of an ammonium phosphate solution, an ammonium sulfate solution, an ammonium thiosulfate solution, and mixtures thereof.
10. The liquid fire-retardant concentrate of claim 9 wherein the liquid fire-retardant component is an ammonium phosphate solution.
11. The liquid fire-retardant concentrate of claim 9 wherein the liquid fire-retardant component is a 10-34-0 agricultural fertilizer solution.
12. The liquid fire-retardant concentrate of claim 9 wherein the liquid fire-retardant component is an 11-37-0 agricultural fertilizer solution.
13. The liquid fire-retardant concentrate of claim 9 wherein the liquid fire-retardant component comprises a mixture of monoammonium phosphate (MAP) and diammonium phosphate (DAP).
14. The liquid fire-retardant concentrate of claim 1 wherein the concentrate further comprises one or more components selected from the group consisting of a suspending clay, a corrosion inhibiting agent, a biopolymer, and mixtures thereof.
15. A fire-retardant solution, the fire-retardant solution comprising the liquid fire-retardant concentrate of claim 1 and water.
16. A method for preparing a fire-retardant solution, the method comprising diluting the liquid fire-retardant concentrate of claim 1 with water.