Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1981-01-08
1982-11-30
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524916, 525353, C08F 836
Patent
active
043616585
ABSTRACT:
The present invention relates to a process for forming a polymeric solution or gel having a viscosity of at least about 50,000 cps which includes the steps forming a solvent system of an organic liquid and a polar cosolvent, the polar cosolvent being less than about 15 wt. % of the solvent system, a viscosity of the solvent system being less than about 1000 cps; dissolving to form a solution, a concentration of the neutralized sulfonated polymer in the solution being about 0.1 to about 20 wt. %, a viscosity of the solution being less than about 20,000 cps; and admixing or contacting said solution with about 5 to about 500 vol. % water, the water being immiscible with the solution and the polar cosolvent transferring from the solution phase to the water phase thereby causing the viscosity of said solution to increase rapidly from less to 20,000 cps to greater than 50,000 cps.
REFERENCES:
patent: 2813087 (1957-11-01), Roth
patent: 3432480 (1969-03-01), Stratton
patent: 3554287 (1971-01-01), Eilers
patent: 3557357 (1971-05-01), Winkler
patent: 3770682 (1973-11-01), Hubbard
patent: 3809959 (1957-10-01), Roth
Klein Robert R.
Lundberg Robert D.
Makowski, deceased Henry S.
O'Brien Dennis E.
Exxon Research and Engineering Co.
Michl Paul R.
Nanfeldt Richard E.
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