Tyco Fire Products LP

Martina E Bowen

Yuan Xie

Pamela A Havelka-Rivard

Stephen Aloysius Barker

Mark Adam-Christopher Siem

Fire foam concentrates are provided that contain trimethyl glycine as a freeze suppressant, an effective amount of at least one anionic, zwitterionic or nonionic surfactant, and an effective amount of a foam stabilizing agent. Methods of preparing fire fighting foams from the concentrates, and methods of fighting fires using these foams, also are provided.

Trimethylglycine as a freeze suppressant in fire fighting foams

Aqueous firefighting composition concentrates are provided that contain an effective amount of a high molecular weight water soluble anionic acrylic polymer, an effective amount of at least one high molecular weight polysaccharide gum; and an effective amount of at least one surfactant. In the present context, a high molecular weight water-soluble anionic acrylic polymer is a polymer with an average molecular weight Mof at least one million (1000 kDa). The combination of the acrylic polymer and the gum provide a concentrate that generates foam with highly desirable firefighting properties, including high foam expansion ratio, long burnback time, and slow drainage time while avoiding problems with previous gum-containing foam concentrates, such as high viscosity and component separation upon storage.

Use of high molecular weight acrylic polymers in fire fighting foams

Aqueous film forming firefighting composition concentrates are provided that contain an effective amount of a monomeric zwitterionic or anionic Cperfluoroalkyl surfactant having a molecule weight less than 800 daltons. The compositions also contain an effective amount of a foam stabilizing agent, and an effective amount of at least one non-fluorinated surfactant. The composition has less than 0.8% F, and is substantially free of any surfactant containing a perfluoroalkyl group containing more than 6 carbon atoms. The composition meets Military Specification MIL-F-24385F.

Aqueous fire-fighting foams with reduced fluorine content

Aqueous film forming firefighting composition concentrates are provided that contain an effective amount of a monomelic zwitterionic or anionic Cperfluoroalkyl surfactant having a molecule weight less than 800 daltons. The compositions also contain an effective amount of a foam stabilizing agent, and an effective amount of at least one non-fluorinated surfactant. The composition has less than 0.8% F, and is substantially free of any surfactant containing a perfluoroalkyl group containing more than 6 carbon atoms. The composition meets Military Specification MIL-F-24385F.

Growing community of inventors

Marinette, WI, United States of America

Martina E Bowen