The invention relates to a polymerisation-reactor for continuous polymerisation. Said reactor is constructed in two stages and comprises a pre-polymerisation step that is embodied as a stirring vessel or as a loop reactor, in addition to a main polymerisation step that is embodied as a tubular reactor. The invention also relates to a method for producing bio-degradable polyester, in particular polylactide, in which the inventive reactor is used. The invention also relates to a polymerisation device that comprises additional parts in addition to the polymerisation reactor.;COPYRIGHT KIPO & WIPO 2010
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