| 摘要 |
SOFT, FLEXIBLE POLYURETHANE FOAM A soft, flexible foam characterized in having (i) a hardness, IFD 25% value, of at most 29 lbs/50 in2, as determined in accordance with Test B1 of ASTM D 3574 and (ii) a density of about 0.9 to 3.0. pounds per cubic foot is disclosed. Accordingly, the foam is prepared by reacting an organic polyisocyanate with a polyol in the presence of a catalyst and water and a compound conforming to <IMG> where A is selected from among H, COOH, NH2, and OH, M is a counter ion, and where n, x and m are selected such that said compound has a number average molecular weight of about 500 to 20,000, a functionality of 0 to 10 and a sulfonate concentration of about 0.1 to 30 percent by weight.
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