Process for preparing phenolic binder

Details Process for preparing phenolic binder Process for preparing phenolic binder

1993-06-08

1994-04-05

Michl, Paul R.

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...

524596, 524598, 528164, C08L 6110, C08K 521, C08K 328, C08G 810

Patent

active

053005627

ABSTRACT:
A phenolic binder for glass fibers is prepared using an aqueous mixture including a phenol-formaldehyde resole resin, modified with urea in the presence of ammonia. The urea and ammonia are added after the basic mixture including the resole resin has been neutralized. The urea-modified resole resin shows greater stability than urea-modified resins prepared without ammonia.

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R. W. Martin, "The Chemistry of Phenolic Resins", (John Wiley & Sons, Inc. New York, 1956) pp. 88-97.

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