Waterborne coating compositions having ultra low formaldehyde concentration
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United States of America Patent
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Aug 18, 1998
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N/A
app pub date -
Dec 19, 1996
filing date -
Dec 19, 1996
priority date (Note) -
Expired
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Abstract
A waterborne coating composition for metal substrates comprising (a) a formaldehyde-containing resin, and (b) a formaldehyde scavenger consisting essentially of an organic compound having at least one active methylene hydrogen and a pKa of about 5 to about 13, wherein the formaldehyde scavenger is present in a sufficient amount to maintain the concentration of free formaldehyde in the composition at less than 0.1% by weight.
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