Polybutene based foam control compositions for aqueous systems
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United States of America Patent
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Jul 20, 1993
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N/A
app pub date -
Feb 6, 1991
filing date -
Feb 6, 1991
priority date (Note) -
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Abstract
A composition to control foam in aqueous systems such as those found in papermaking operations comprising a polybutene and at least one surfactant having a melting or pour point below 20.degree. C. The surfactants include polyethylene glycol esters, sorbitan ester, polyoxyalkylene ester, oleic diethanolamide and block copolymers of ethylene oxide and propylene oxide. Due to their low melting point, these surfactants may be blended with the polybutene at room temperature resulting in a foam control composition that is translucent, resistant to deposition and highly effective.
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