20140163123 | HYDROPHILIC THERMAL RETICULATED POLYURETHANE FOAM USEABLE FOR CREATION OF A MOLTEN METAL FILTER - A hydrophilic, polyurethane foam manufactured from a composition that includes 90-110 parts by weight of polyester polyol, 0.9-1.1 parts by weight of ester surfactant, 3-20 parts by weight of a hydrophilic surfactant, 1.89-2.31 parts by weight of a polyurethane catalyst, 0.126-0.154 parts by weight of an amine catalyst, 3.348-4.092 parts by weight of water, and 46.98-57.42 parts by weight of toluene diisocyanate. The polyurethane is capable of absorbing water in a time period of about 5 minutes or less. The polyurethane foam is a precursor to the formation of a molten metal filter. | 06-12-2014 |