| 摘要 |
A process for forming a polymeric solution or gel having a viscosity of at least about 50,000 cps which includes forming a solvent system of an organic liquid and a polar consolvent, the polar consolvent being less than about 15 wt. % of the solvent system, the viscosity of the solvent system being less than about 1,000 cps; dissolving a neutralized sullonated polymer in the solvent system to form a solution, the concentration of the neutralized sulfonated polymer in the solution being 0.1 to 20 wt %, the viscosity of the solution being less than about 20,000 cps; and adding about 5 to about 500 vol. % water to the solution having a viscosity less than aboit 20,000 cps, the water being immiscible with the solution and the polar cosolvent transferring from the solution phase to the water phase thereby causing the viscocity of said solution to increase from legs than 20,000cps to geater than 50,000 cps.
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