Products of the condensation of phenolmonosulfonic acids, dihydr

Details Products of the condensation of phenolmonosulfonic acids, dihydr Products of the condensation of phenolmonosulfonic acids, dihydr

1991-05-08

1992-10-13

Kight, III, John

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...

525534, 528129, 528137, 528142, 528143, 528144, 528145, 528146, 528150, 528155, 528162, 528164, C08J 6110

Patent

active

051551640

ABSTRACT:
Products of the condensation of phenolmonosulfonic acids, dihydroxydiphenyl sulfones, urea and formaldehyde can be obtained by

REFERENCES:
patent: 2129554 (1937-10-01), Russell et al.
patent: 2242681 (1938-02-01), Schafer et al.
patent: 4009996 (1977-03-01), Wurmli
patent: 4592940 (1986-06-01), Blyth et al.

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