Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1992-04-30
1993-10-26
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
523414, C08J 303, C08L 7706
Patent
active
052567273
ABSTRACT:
Polyamidoamine-epichlorohydrin resin solutions with less than 1500 ppm of epichlorohydrin hydrolyzates after acid stabilization are produced by contacting the resin solution with either (a) dibasic phosphate salts having the general formula M.sub.2 HPO.sub.4 where M represents Na, K, or NH.sub.4, or (b) a nucleophilic alkanolamine at a temperature of less than about 50.degree. C. for a time sufficient to produce a product solution having, after stabilization with acid, less than 1500 ppm of epichlorohydrin hydrolyzates.
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Dulany Margaret A.
Ringold Clay E.
Aylward D.
Georgia-Pacific Resins Inc.
Marquis Melvyn I.
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