| 摘要 |
<p>FOAM CONTROL The instant invention relates to compositions containing (a) a high-foaming nonionic surfactant and (b) a foam reducing amount of a polyoxyalkylene compound of the formula: Y¢(A)m-(B)nH!2 wherein Y is the residue formed by the removal of two atoms of active hydrogen from an initiator having a total of not more than 20 carbon atoms, preferably butanediol; A is a hydrophobic, heteric mixture of an oxytetramethylene radical, derived from tetramethylene oxide and a vicinal alkylene oxide radical derived from propylene oxide, B is primarily C2H40, n is an integer such that the total weight of said B is about 5 to about 40 percent by weight of the total oxyalkylene residue weight of the compound and the total molecular weight of the hydrophobe, 2m is about 1000 to 3000.</p> |
