Paired alkyl phenol Mannich condensates
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United States of America Patent
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Mar 24, 1992
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N/A
app pub date -
Nov 19, 1990
filing date -
Nov 19, 1990
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Expired
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Abstract
Normally liquid polyfunctional final Mannich condensates that are useful as curing agents for epoxy resins are prepared by reacting a para C.sub.1 -C.sub.15 alkyl phenol with formaldehyde and a first polyoxyalkylene diamine to form an intermediate Mannich condensate that is reacted, in turn, with formaldehyde and a second polyoxyalkylene diamine to form the final Mannich condensate, the first polyoxyalkylene diamine having the formula: ##STR1## wherein: n represents a positive number having a value of 1 to about 6, and R' independently represents hydrogen or a methyl group, the second polyoxyalkylene diamine having the formula: ##STR2## wherein n and n' represent positive numbers having a value of 1 to about 6, R' independently represents hydrogen or a methyl group, and R'' represents an alkyl group containing 1 to 4 carbon atoms or a cyanoethyl group.
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