Bio-based, PFA-free fire foam concentrate compositions comprising plant proteins, surfactants, alcohols, and builders, production thereof, and use thereof
AssigneeCross Plains Solutions, LLC
InventorsKevin R. Anderson, David E. Garlie
Life of this patent
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Abstract
A PFAS-free fire foam concentrate composition comprising water, a plant-based protein, a surfactant, an alcohol, and a builder. The bio-based content of the PFAS-free fire foam is preferably 80% by weight or greater. There is also disclosed a process to produce the PFAS-free fire foam concentrate composition, and the application of the fire foam concentrate onto a Class A fire or Class B fire.
Claims9
A method of extinguishing a fire using a PFAS-free bio-based fire foam concentrate composition, the method comprising:
- providing a PFAS-free bio-based fire foam concentrate composition, comprising:
- water, an enzymatically modified plant protein that has been prepared by:
- forming a protein dispersion by mixing the plant protein with water containing 0.1% to 1% sodium bisulfite or sodium sulfite based on a dry weight of the plant protein,
- adjusting the protein dispersion to pH 7-8 by adding a buffer comprising a 2:1 mixture of sodium carbonate and sodium bicarbonate,
- modifying the plant protein in the plant dispersion with an alcalase enzyme at a concentration sufficient to substantially reduce the viscosity of the protein dispersion for 1-2 hours at a temperature between 30 degrees C. and 50 degrees C., and
- adding a C1-C4 alcohol to halt the enzymatic reaction;
- a non-ionic surfactant selected from capryl glucoside and decyl glucoside, the C1-C4 alcohol, and a builder;
- mixing the PFAS-free bio-based fire foam concentrate composition with water to form a diluted wetting agent;
- directing the diluted wetting agent to a fire to extinguish the fire.
A method of extinguishing a fire using a PFAS-free bio-based fire foam concentrate composition, the method comprising:
- providing a PFAS-free bio-based fire foam concentrate composition, comprising:
- water, an extracted and flash desolventized soy-based protein flour that has been prepared by:
- forming a protein dispersion by mixing the soy-based protein flour with water containing 0.1% to 1% sodium bisulfite or sodium sulfite based on the dry weight of the soy-based protein flour,
- adjusting the protein dispersion to pH 7-8 by adding a buffer comprising a 2:1 mixture of sodium carbonate and sodium bicarbonate,
- enzymatically modifying the soy-based protein flour in the protein dispersion with an alcalase enzyme at a concentration sufficient to substantially reduce the viscosity of the protein dispersion for 1-2 hours at a temperature between 30 degrees C. and 50 degrees C., and
- adding a C1-C4 alcohol to halt the enzymatic reaction;
- a non-ionic surfactant selected from capryl glucoside and decyl glucoside, the C1-C4 alcohol, and a builder;
- mixing the PFAS-free bio-based fire foam concentrate composition with water to form a diluted wetting agent;
- directing the diluted wetting agent to a fire to extinguish the fire.
Dependencies are inferred from the claim text.