Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-07-14
1977-07-05
Czaja, Donald E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 59R, 260 60, C08G 808, C08G 810, C08J 900
Patent
active
040339092
ABSTRACT:
Phenolic resoles are provided which are free of ionic species capable of being removed by the free acid form of a cation exchange resin and the free base form of an anion exchange resin. The deionized resoles of the invention have extended shelf-life due to their enhanced inherent stability towards self-condensation under otherwise adverse aging conditions. Notwithstanding their extended shelf-life, the resoles of the invention have excellent reactivity as foamable compositions, and are used with particular advantage for the formation of cellular phenolic resins. Also provided is a method for producing phenolic resoles having the aforementioned characteristics which comprises treatment of alkaline metal catalyzed condensates of a phenol and an aldehyde with cation and anion exchange resins in their respective free acid and free base forms.
REFERENCES:
patent: 2865875 (1958-12-01), Hyman et al.
patent: 3432453 (1969-03-01), Gladney et al.
patent: 3657188 (1972-04-01), Perkins
Encyclopedia of Pol. Sci. & Techn. (vol. 7) (Interscience) (N.Y.) (1967), pp. 724, 725, & 729.
Whitehouse et al.-Phenolic Resins (Iliffe Books Ltd.) (London) (2nd ed.) (1967), pp. 123-124.
Czaja Donald E.
Fletcher H. H.
Klosty Marylin
Union Carbide Corporation
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