| abstract |
A PROCESS FOR PREPARING A STABLE, SUBSTANTIALLY ANHYDROUS ORGANOSOL OF FLUOROCARBON POLYMER WHICH COMPRISES ADMIXING AN AQUEOUS DISPERSION OF TETRAFLUOROETHYLENE POLYMER HAVING A PARTICLE SIZE OF 0.05 TO 0.5 MICRON, AN AVERAGE PARTICLE SIZE OF 0.1 TO 0.3 MICRON AND A STANDARD SPECIFIC GRAVITY OF 2.20 TO 2.30 AND/OR AQUEOUS DISPERSION OF TETRAFLUOROETHYLENE-HEXAFLUOROPROPYLENE COPOLYMER HAVING A PARTICLE SIZE OF 0.01 TO 0.03 MICRON, AN AVERAGE PARTICLE SIZE OF 0.05 TO 0.2 MICRON, A SPECIFIC MELT VISCOSITY AT 380*C. OF 1X10**3 TO 10**6 POISES AND A RATIO BY WEIGHT OF TETRAFLUOROETHYLENE:HEXAFLUOROPROPYLENE OF 97/3 TO 5/95 WITH AN ORGANIC SOLVENT WHICH IS INSOLUBLE OR HARDLY SOLUBLE IN WATER AND DOES NOT INTERFERE CHEMICALLY OR PHYSICALLY WITH THE SAID POLYMER AS A TRANSFERRING SOLVENT AND AN ORGANIC SOLVENT WHICH IS SOLUBLE IN WATER OR AN AQUEOUS SOLUTION OF AN ELECTROLYTE AS A TRANSFERRING AGENT SO AS TO TRANSFER THE POLYMER PARTICLES FROM THE WATER LAYER INTO THE TRANSFERRING SOLVENT LAYER AND SEPARATING THE TRANSFERRING SOLVENT LAYER FROM THE SAID WATER LAYER. |