Hardener for epoxy resin and epoxy resin composition
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United States of America Patent
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Jan 7, 2003
Grant Date -
N/A
app pub date -
Jun 18, 2001
filing date -
Oct 19, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A curing agent for epoxy resins, the curing agent containing as an active ingredient a compound represented by the formula (1) or a salt thereof and an amine compound or a salt thereof, the curing agent being characterized in that at least one of the compound represented by the formula (1) and the amine compound is a salt of thiocyanic acid; and an epoxy resin composition having the curing agent incorporated therein: NH.sub.2 N(R.sup.1)(R.sup.2) (1) wherein R.sup.1 and R.sup.2 are the same or different and each represents alkyl having 1 to 8 carbon atoms, aryl, a nitrogen-containing heterocyclic group or when taken together, represents alkylene having 2 to 11 carbon atoms or a group represented by --R.sup.3 --R.sup.4 --R.sup.5 -- wherein R.sup.3 and R.sup.5 are the same or different and each represents alkylene having 1 to 8 carbon atoms, and R.sup.4 is an oxygen atom, a sulfur atom or a group .dbd.NR.sup.6 or .dbd.NNH.sub.2, wherein R.sup.6 is a hydrogen atom or alkyl having 1 to 8 carbon atoms.
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