Latex coagulation process using lignin compound

Details Latex coagulation process using lignin compound Latex coagulation process using lignin compound

1976-03-08

1977-05-24

Levin, Stanford M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

260 175, 260 23S, 260 336AQ, 528491, 528492, C08F 622

Patent

active

040257118

ABSTRACT:
Synthetic styrene-conjugated diolefin polymers, e.g. SBR rubbers, are recovered from their aqueous polymerization emulsion by coagulation with acid and a lignin compound. The conventional use of sodium chloride as a coagulant is avoided so as to overcome the problem of sodium chloride in the effluent. By this process of the invention, a rubber crumb of increased porosity is obtained, which is easier to dry.

REFERENCES:
patent: 3821185 (1974-06-01), Cooper et al.

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