Process for producing rubber latex

摘要

A process for preparing a synthetic diene rubber by emulsion polymerization, wherein an electrolyte capable of coagulating particles of a rubber latex is added to the polymerization system in the course of the polymerization when the polymerization conversion reaches 10 to 70 % by weight, and an aqueous solution containing EDTA and an iron salt in an EDTA/iron salt ratio of 4.3 to 18 by mole is added 30 minutes or more after the addition of the electrolyte, thereby producing a rubber latex having a good quality in a shortened period of time in a high polymerization conversion without extending the polymerization time.