Method of using a defoamer
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United States of America Patent
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Issued Date -
Feb 2, 2006
app pub date -
Apr 22, 2005
filing date -
Apr 23, 2004
priority date (Note) -
Abandoned
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Abstract
A method for using a defoaming formulation useful as an antifoaming agent, a foam controlling agent, or a defoaming agent. The method comprises adding the defoaming formulation that comprises one or more alkoxylate species to a system, wherein the one or more alkoxylate species is characterized as Acc-[(Ox).sub.i].sub.n, wherein Acc is an acceptor having a functionality of n ranging between 1 and about 100. (Ox).sub.i are oxide blocks, each oxide block having a composition comprising from 1 to 150,000 units of oxide species selected from ethylene oxide, propylene oxide, butylene oxide or combinations thereof and i ranges between 1 and about 10. The composition of adjacent oxide blocks is different and the average molecular weight of the one or more alkoxylate species is greater than about 2500 gmole.sup.-1. Some embodiments of the present inventions have mixtures of alkoxylate species having average molecular weights between about 5000 and about 3,000,000 gmole.sup.-1.
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