公开(公告)号：US3880795A

公开(公告)日：1975-04-29

申请号：US33113273

申请日：1973-02-09

Applicant: BAYER AG

Inventor： HAUPT HEINRICH ,  VERNALEKEN HUGH

IPC: D01F6/64 ,  C08G64/40 ,  C08C11/24

CPC classification number: C08G64/40

Abstract: Process for the preparation of polycarbonate solutions that are particularly suitable for the production of filaments and films. The solutions are prepared by precipitating polycarbonates, in a largely crystalline form, from their solutions in polycarbonate solvents by adding specified precipitants to the solutions and thereafter redissolving the precipitated polycarbonates in their solutions by evaporating off the precipitants.

Abstract translation: 制备特别适用于生产细丝和薄膜的聚碳酸酯溶液的方法。 通过向溶液中加入特定的沉淀剂，然后通过蒸发沉淀剂将沉淀的聚碳酸酯再溶解在其溶液中，将聚碳酸酯以大体积结晶的形式从它们的聚碳酸酯溶剂溶液中沉淀出来制备溶液。