| abstract |
A PROCESS FOR PREPARING A THERMOPLASTIC RANDOMLY BRANCHED POLYCARBONATE COMPOSITION WHICH COMPRISES REACTING IN AN ORGANIC SOLVENT A DIHYDRIC PHENOL AND A CARBONATE PRECURSOR, WHICH REACTION IS CARRIED OUT IN THE PRESENCE OF 0.1 TO ABOUT 2 MOLE PERCENT OF A FINELY DIVIDED POLYFUNCTIONAL ORGANIC COMPOUND, 50 WEIGHT PERCENT OF WHICH HAS A PARTICLE SIZE OF LESS THAN 100 MICRONS AND WHEREIN THE ORGANIC SOLVENT HAS SUSPENDED THEREIN AN INORGANIC ACID ACCEPTOR. THE POLYFUNCTIONAL ORGANIC COMPOUND IS ONE WHICH MAY BE EITHER PHLOROGLUCINOL, 2,4-DIHYDROXY-BENZOIC ACID, TRIMESIC ACID, 4,4-BIS(3-ISOPROPYL-4CARBOXYPHENYL) HEXANOL, 3,5-DIHYDROXYTHIOPHENOL, MELAMINE OR TRIETHANOLAMINE. |