公开(公告)号：US3897392A

公开(公告)日：1975-07-29

申请号：US40898173

申请日：1973-10-23

Applicant: BAYER AG

Inventor： HAUPT HEINRICH ,  FREITAG DIETER ,  VERNALEKEN HUGO ,  WAGNER KUNO ,  FINDEISEN KURT

IPC: C08G63/00 ,  C08G64/00 ,  C08G64/14 ,  C08G64/20 ,  C08G17/13

CPC classification number: C08G64/14

Abstract: Thermoplastic branched aromatic polycarbonates and novel orthoester branching agents. The polycarbonates may be characterized by structural elements of the formula

Abstract translation: 热塑性支链芳族聚碳酸酯和新型原酯支化剂。 聚碳酸酯的特征可以在于式[R'（ODO-CO）nO-DO] 3C-X'的结构单元，其中X'= -ODO - （ - CO-ODO）n R'，[-ODO -ODO）n R'] 3 D =并且可以相同或不同Z = C1-C10亚烷基或C3-C10亚环烷基，C2-C15亚烷基或C3-C15亚环烷基，单键，-O - ， - S-， -SO - ， - SO 2 - ， - CO-或CH 3 CH 3 | | C -C - | CH 3 CH 3 R R = H，C 1 -C 4烷基或卤素，R'= H或-CO-O-芳基和N，N '=标识或不同，0和50之间，所有的N和N'在聚碳酸酯分子中的比例至少为1。

公开(公告)号：US3912687A

公开(公告)日：1975-10-14

申请号：US45094774

申请日：1974-03-13

Applicant: BAYER AG

Inventor： HAUPT HEINRICH ,  VERNALEKEN HUGO ,  WEIRAUCH KURT ,  HABERLAND ULRICH

IPC: C08G63/00 ,  C08G64/00 ,  C08G64/08 ,  C08G64/24 ,  C08G64/28 ,  C08G63/62 ,  C08G75/28

CPC classification number: C08G64/24 ,  C08G64/08 ,  C08G64/28

Abstract: A process is provided for making high molecular weight halosubstituted aromatic polycarbonates in a phase boundary reaction in which an o,o,o'',o''-tetrahalogenobisphenol and phosgene are reacted in an aqueous medium at a pH of 7 to 9 in the presence of from 2 mol% to 20 mol% catalyst in a first step and the resulting product is polycondensed at a pH of at least about 13 in a second step.

Abstract translation: 提供了一种在相边界反应中制备高分子量卤素取代的芳族聚碳酸酯的方法，其中o，o，o'，o'-四卤代双酚和光气在水性介质中在7至9的pH下反应 在第一步中存在2mol％至20mol％的催化剂，并且所得产物在第二步中在至少约13的pH下缩聚。

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。

公开(公告)号：US3859245A

公开(公告)日：1975-01-07

申请号：US33315873

申请日：1973-02-16

Applicant: BAYER AG

Inventor： STIELER WERNER ,  OELMEYER ROLF ,  HAUPT HEINRICH ,  VERNALEKEN HUGO

IPC: D01F6/64 ,  C08G64/40 ,  C08G53/00 ,  C08G51/30

CPC classification number: C08G64/40

Abstract: The invention is related to the production of the solution of a high molecular weight polycarbonate having a molecular weight above 30,000 suitable for the production of films and filaments. The process comprises subjecting the solid polycarbonates solutions obtained by solvent removal from polycarbonate solutions at temperatures below the melting point of said polycarbonate coupled with the application of shear energy for 0.1 to 50 hours to a solvent atmosphere of solvents which are able to dissolve polycarbonates and subsequently redissolving the thus obtained products.