Water soluble phenolic-formaldehyde polymer which is a surfactan

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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525507, 528107, 528109, 528153, 528158, 528129, C08G 828, C08G 836

Patent

active

044516231

ABSTRACT:
Certain water-soluble substituted phenol formaldehyde type copolymers retain their viscosities in high brine environments and are highly useful as surfactant-mobility control agents in oil recovery processes.

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