Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1980-04-18
1982-01-26
Nielsen, Earl A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
525507, 528 94, 528 98, 528 99, 528102, 528341, C08G 5958
Patent
active
043129749
ABSTRACT:
Novel unitary, storable, heat-curable epoxy resin systems are prepared which contain a polyepoxide and a curing amount of a salt of piperazine and a C.sub.3 -C.sub.21 polycarboxylic acid. In a preferred aspect the salt is present in a stoichiometric amount. The resin system is cured into an insoluble, infusible resin product by heating thereof at a temperature greater than 50.degree. C., preferably 50.degree.-250.degree. C., for a time sufficient to complete the cure.
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Air Products & Chemicals, Inc., "Heat Sensitive Catalysts", Chemical Abstracts 84, 106634j (1976).
Kelley Margaret B.
National Starch and Chemical Corporation
Nielsen Earl A.
Szala Edwin M.
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