Patent ID: 7109275
Filing Date: 2006-09-19
Classification: C08F

Abstract:
1. A process of polymerizing a polymerization mixture comprising at least one monomer wherein at least an organic initiator and 0.01–1 wt.% of a protective colloid, based on the weight of the monomers to be polymerized, are metered to the polymerization mixture at a polymerization temperature by (a) adding portions of the initiator and the protective colloid separately in an alternating way or sequentially in random order of at least 2 moments, (b) by metering at least part of the initiator and at least part of the protective colloid intermittently and/or continuously, over a period of time during which at least 20% of all monomer used in the process is polymerized, or (c) by metering the initiator and the protective colloid continuously and/or intermittently after at least 1% of the monomer(s) has already been polymerized, with at least 10% of all monomer used in the process being polymerized during the metering period.