PROCESS FOR PREPARATION OF A POLYOXYMETHYLENEHOMO- OR COPOLYMER END PRODUCT

摘要：

A process is proposed for preparation of a polyoxymethylenehomo- or copolymer end product starting from a polyoxymethylenehomo- or copolymer melt via a) addition and incorporation of additives, b) degradation of unstable chain ends and c) devolatilization for removal of volatile components, and is characterized in that only a substream of at most 10% by weight of the starting polyoxymethylenehomo- or copolymer melt or a corresponding mass flow of the melt of a polyoxymethylenehomo- or copolymer end product which meets specification or which is of lower quality is passed by way of an ancillary extruder in order to carry out step a) of the process giving an additive-modified ancillary stream, and the remainder of the process is carried out without using an extruder.

申请号： PCT/EP2006/068418 专利名称： PROCESS FOR PREPARATION OF A POLYOXYMETHYLENEHOMO- OR COPOLYMER END PRODUCT 申请（专利权）人： [BASF AKTIENGESELLSCHAFT, SCHWITTAY, Claudius, BLINZLER, Marko, MECKELNBURG, Dirk] 发明人： [SCHWITTAY, Claudius, BLINZLER, Marko, MECKELNBURG, Dirk] 其他信息：