Patent ID: 6620883
Filing Date: 2003-09-16
Classification: C08F,C08L

Abstract:
A process for the preparation of graft rubber polymers of the ABS type by emulsion polymerization and according to the fed batch process, characterised in that the initiator used for initiating polymerization or the initiator system used is added to the reaction mixture in portions or continuously in such a manner that, in the course of the reaction, a minimum of initiator or initiator system added per time interval is passed and in at least 50% of the total reaction time the amount of initiator added in each time interval corresponds at least to an amount &gE;0.5% of the total amount of initiator, the total reaction time comprising n time intervals where n=from 3 to 20, and each time interval being from 5 to 90 minutes in length.