Condensation polymers of sulfonated phenols, urea, other organic

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate

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528129, 528158, 528162, 528211, 525497, 525498, 525499, 525500, 8 9424, 8 9421, C08G 804

Patent

active

053429168

ABSTRACT:
Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases and formaldehyde, obtainable by

REFERENCES:
patent: 3784648 (1974-01-01), Bergmeister et al.
patent: 3852374 (1974-12-01), Erdmann et al.
patent: 4009996 (1977-03-01), Wurmli
patent: 4285848 (1981-08-01), Hickson
patent: 5155164 (1992-10-01), Graf et al.

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