PROCEDURE FOR OBTAINING THERMOPLASTIC MOLDING MASSES.

摘要

PROCEDURE FOR THE MANUFACTURE OF A THERMOPLASTIC MOLDING MASS FROM 10-65% BY WEIGHT OF A GRAFT POLYMER, OBTAINED BY POLYMERIZATION OF STYRENE AND ACRYLONITRILE EMULSION, IN RELATION BY WEIGHT OF 90:10 TO 50:50, AND WHERE THE STYRENE CAN BE REPLACED, FULLY OR PARTIALLY, BY ALPHA-METHYLLYRENE OR METHYL METHACRYLATE, IN THE PRESENCE OF A RUBBER BASE AT LEAST AND WHERE THE MASS RATIO OF THE MONOMERS AND THE RUBBER POLYMER EMPLOYED, IS: 20 80 TO 70:30 AND 90 TO 35% BY WEIGHT OF A COPYLENE OF STYRENE AND ACRYLONITRILE IN PONDERAL PROPORTION 90:10 TO 50:50, WHICH IS STRETCHED, MAY BE REPLACED, TOTAL OR PARTIALLY, BY METHYL ALPHA-METHYLRENE OR METHYLLO , IN WHICH FOR THE PREPARATION OF GRAFTING POLYMERIZATION AND 0.05 TO 1.00 PARTS BY WEIGHT (100 PARTS BY WEIGHT OF GRAFT MONOMER) OF A MERCAPTAN STAGELY ADDED OVER A SPACE OF TIME TO THE RUBBER BASE OF THE LATEX .