Patent ID: 8735471
Filing Date: 2014-05-27
Classification: B32B,C08J,C08K,Y10T

Abstract:
1. An open-cell flame retardant foam derived from an aqueous froth comprising: a) a thermoplastic resin comprising an ethylene homopolymer, an ethylene/α-olefin copolymer, or an ethylene/α-olefin multiblock interpolymer; a polypropylene homopolymer, a propylene/α-olefin copolymer, or a propylene/α-olefin multiblock interpolymer; or combinations thereof; b) water; c) a frothing surfactant comprising at least one of alkylcellulose ethers, hydroxyalkyl cellulose ethers, hydroxyalkyl alkylcellulose ethers, guar gum, xanthan gum, and polyoxyethylene resins of at least 20,000 molecular weight; d) a gas; e) at least one flame retardant comprising at least one selected from an inorganic salt, an intumescent, a halogenated compound, a phosphate compound, a borate compound, a melamine compound, and combinations thereof; and f) a dispersion-stabilizing agent; wherein the froth comprises from about 15 to 75 weight percent component (a), from about 25 to 75 weight percent component (b), from about 0.1 to 10 weight percent component (c), from about 5 to 50 weight percent component (e), and wherein (d) is present in an amount such that (d) comprises at least 10 percent of the total volume of all components present in the froth; and wherein the at least one flame retardant comprises from about 5 to about 70% of a total weight of the thermoplastic resin, the at least one stabilizing agent and the at least one flame retardant.