| 摘要 |
PURPOSE: A continuous process for the preparation of polyacetal copolymers is provided which can produce the title compounds economically without requiring the after treatment of products of an undesirable second reaction. CONSTITUTION: The process for producing polyacetal copolymers from 1,3,5-trioxane and the comonomer known for this purpose comprises (1) adding an initiator such as strong protic acids to the monomer mixture in an amount of 0.01 to 0.6 ppm based on the total amount of the monomer in finely divided form, (2) transferring the crude polymer from the polymerization reactor to a mixing unit without further intermediate steps after the polymerization step, (3) removing excess monomer from the crude polymer in the mixing unit or between polymerization reactors and mixing units by applying reduced pressure, and, if desired, generally (4) incorporating customary stabilizers, assistants, fillers, reinforcing materials and/or colorants into the polymer in the mixing unit.
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