METHOD OF SYNTAN SYNTHESIS Russian patent published in 1995 - IPC

Abstract RU 2041954 C1

FIELD: organic chemistry. SUBSTANCE: diphenylolpropane is sulfomethylated and condensed with formaldehyde. Prepared product is acidified with sulfuric acid followed by precondensation of carbamide or together with dispersion of prepared product in lignosulfonates. EFFECT: improved method of synthesis.

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RU 2 041 954 C1

Authors

Glazyrina L.A.

Ivanov V.D.

Dates

1995-08-20—Published

1992-07-10—Filed