Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1996-07-17
1999-06-01
McCamish, Marion E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
523143, 523145, 524372, 524375, 525504, 528154, 528243, 528493, 528495, 528502C, 528503, 26433119, C08G 804, C08G 1402
Patent
active
059089148
ABSTRACT:
This invention relates to benzylic ether phenolic resole resins prepared in a sealed reaction vessel and their uses. The benzylic ether phenolic resole resins are prepared by heating phenol and an aldehyde in a sealed reaction vessel in the presence of a divalent metal catalyst without removing water generated by the reaction until an appropriate endpoint for the resin is reached. The benzylic ether phenolic resole resins produced by the process are preferably free or essentially free of unreacted formaldehyde and can be used in the resin component of phenolic-urethane foundry binders to make foundry cores and/or molds by the cold-box and no-bake processes. The cores and/or molds are used for making metal castings.
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Dando Thomas Edward
Dunnavant William Rexford
Fechter Robert Bernard
Langer Heimo Josef
Ashland Inc.
Guarriello John J.
Hedden David L.
McCamish Marion E.
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