Extended amine curing agents [and epoxy resins cured therewith]
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United States of America Patent
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Mar 25, 1986
Issued Date -
N/A
app pub date -
Mar 11, 1985
filing date -
Jul 5, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Extended 1,2-epoxy-interactive polyamine curing compositions and a method for preparing such curing compositions from a 1,2-epoxy-interactive polyamine and a cured normally solid elastomeric polyurethane wherein the 1,2-epoxy-interactive curing agent is extended by forming a solution of the cured polyurethane elastomer in the 1,2-epoxy-interactive polyamine by (a) adding comminuted cured polyurethane elastomer particles to the polyamine, (b) adding a polar organic solvent solution of cured polyurethane elastomer to the polyamine, followed by removal of the polar organic solvent or (c) adding a phenol and formaldehyde to a solution of the cured polyurethane elastomer in the 1,2-epoxy-interactive polyamine to convert the polyamine to the corresponding Mannich condensate.
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