Fire retardant foam and

July 12, 2006

Patent No. U.S. 7,033,526 B2
National Starch and Chemical Investment Holding Corp. has received a patent for a method for retarding the spread of fire comprising the step of coating an object with a composition comprising a material which retains an amount of water effective to protect a coated substrate from spread of fire for at least 115 seconds and produces carbon dioxide upon exposure to heat, a rheology modifying agent containing carboxyl groups, optionally a synthetic additive and, optionally a foam generator, wherein the material which produces carbon dioxide comprises at least one (hydroxyalkyl)urea.