Process for preparing benzylic ether phenolic resole resins

Details Process for preparing benzylic ether phenolic resole resins Process for preparing benzylic ether phenolic resole resins

1996-07-17

1998-05-26

Mullis, Jeffrey

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528140, C08G 810

Patent

active

057566402

ABSTRACT:
This invention relates to a process for preparing benzylic ether phenolic resole resins in a sealed reaction vessel. 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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Huttenes-Albertus -Innovation and Partnership Foundry Trade Journal, 167(3487), pp. 736-737, Dec. Oct. 24, 1993.

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