Demulsification of water-in-oil emulsions
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United States of America Patent
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Oct 28, 2003
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N/A
app pub date -
Feb 4, 1999
filing date -
Feb 4, 1999
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Abstract
Water-in-Oil emulsions are demulsified using adducts of a) polyalkylene glycols (PAGS) having a molecular weight greater than 6,500 and up to 60,000, ethylene oxide (EO), and diisocyanates (DIs) or b) polyalkylene glycols (PAGs) having a molecular weight greater than 6,500 and up to 60,000 and diisocyanates (DIs). The preferred PAG is polypropylene glycol and the preferred DIs are meta or para tetramethylxylene diisocyanate and toluene diisocyanate.
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