Aqueous based fire foam compositions containing hydrocarbyl...

Details Aqueous based fire foam compositions containing hydrocarbyl... Aqueous based fire foam compositions containing hydrocarbyl...

A - Human Necessities

62

D

31/6

A62D 1/04 (2006.01) A62D 1/02 (2006.01)

Patent

CA 1197976

61-13737/CGC 966/+ Aqueous Based Fire Foam Compositions Containing Hydrocarbyl Sulfide Terminated Oligomer Stabilizers Abstract of the Disclosure This invention relates to aqueous based fire fighting foams contain- ing a stabilizing amount of an oligomer of the formula R1-E-S(O)n[M1]x[M2]y[M3]zH wherein R1 is an oleophilic aryl, araliphatic, aliphatic or cyclo- aliphatic group having up to 25 carbon atoms; E is a direct bond, or an organic covalently bonded divalent linking group, n is 0, l or 2, [M1] is a hydrophilic acrylamido monomer unit, [M2] is a copolymerizable non-acrylamido hydrophilic monomer unit, [M3] is a copolymerizable hydrophobic monomer unit, the average of the sum of x, y and z is between about 3 and about 500, and Image is between 1 and about 0.5. These stabilizing oligomer additives in aqueous based fire fighting foams improve foam ex- pansion, foam drainage and fire extinguishing times.

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