Curing agents for epoxy-based polymers
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United States of America Patent
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Nov 4, 2003
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N/A
app pub date -
Jan 22, 2002
filing date -
Feb 12, 2001
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Abstract
A method for making flexible epoxy resins by curing an epoxide and a bis-phenol with an aliphatic secondary diamine having the structural formula (I) or (II): ##STR1## where R.sub.1 and R.sub.2 are each individually an alkyl, alkenyl, aryl, or arylalkyl group having from about 1 to about 20 carbon atoms, and R.sub.3 and R.sub.4 are each individually an alkyl or alkenyl group having from about 1 to about 20 carbon atoms, or hydrogen.
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