Polymer blend for dispersion of particulate materials in aqueous systems
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United States of America Patent
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Oct 6, 1987
Issued Date -
N/A
app pub date -
Dec 23, 1985
filing date -
Jun 27, 1985
priority date (Note) -
Expired
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Abstract
Particulate materials in aqueous media such as heat exchange systems are dispersed by introducing into the system a polymer blend comprising about 50 to 99% by weight of (A) a water-soluble, dissociating, low molecular weight polymer of at least one alpha, beta-monoethylenically unsaturated carboxylic acid, and about 50 to 1% by weight of (B) a water-soluble, dissociating, lower molecular weight polymer selected from (1) vinyl aromatic polymers and (2) polymers of 2-acrylamido-2-methylpropanesulfonic acid. A typical polymer blend comprises, in neutralized form, (A) polyacrylic acid terminated with thioglycolic acid and (B) a polymer of sulfonated styrene and maleic anhydride.
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