Process for producing neutralized phenol resins

Details Process for producing neutralized phenol resins Process for producing neutralized phenol resins

1978-08-28

1980-04-15

Schain, Howard E.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528147, 528165, C08G 228

Patent

active

041984994

ABSTRACT:
Resol type phenol resins containing scarcely or no phenol mononucleus compounds (monomers) and phenol dinuclei compounds (dimers) and their methylolated derivatives and scarcely containing molecules having an apparent molecular weight of more than 2500 are produced by reacting phenol with formaldehyde in the presence of an alkaline catalyst in a molar ratio of 3.0 to 6.0 moles of formaldehyde and 0.05 to 2.0 moles of the alkaline catalyst per mole of phenol, neutralizing the reaction solution with an acid to pH 4.5 to 6.5 and precipitating the resulting product for separation.

REFERENCES:
patent: 1909788 (1933-05-01), Pantke
patent: 1909789 (1933-05-01), Pantke
patent: 1946459 (1934-02-01), Granger
patent: 2457493 (1948-12-01), Redfern
patent: 2541688 (1951-02-01), Cardwell
patent: 2609352 (1952-09-01), Kvalnes
patent: 2748101 (1956-05-01), Shappell
patent: 2819251 (1958-01-01), Cleek et al.
patent: 3083170 (1963-03-01), Booty
patent: 3657188 (1972-04-01), Perkins
patent: 3884859 (1975-05-01), Honda et al.
patent: 4033909 (1977-07-01), Papa

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