Title:
【発明の名称】ジフエノールとジカルボン酸ハロゲン化物の重縮合方法
Document Type and Number:
Japanese Patent JPH03502468
Kind Code:
A
Abstract:
PCT No. PCT/AT89/00119 Sec. 371 Date Jul. 17, 1990 Sec. 102(e) Date Jul. 17, 1990 PCT Filed Dec. 7, 1989 PCT Pub. No. WO90/06335 PCT Pub. Date Jun. 14, 1990.In a two-phase interface polycondensation process for preparing aromatic polyesters from diphenols comprising at least in most part a central carbon atom, with groups bound to this carbon atom being hampered in their free rotation, in particular for instance 9,9-bis(4-hydroxyphenyl)fluorene, with dicarboxylic-acid chlorides such as iso-terephthaloyl chloride, the aqueous phase with the diphenolate contains acetone or methylethylketone as the solubilizer, whereas the dicarboxylic-acid chlorides dissolved in a chlorinated hydrocarbon form the organic liquid phase. Compared to known procedures with other solubilizers, for instance isopropanol, in this case polyesters are produced with higher molecular weights. The acetone or methylethylketone also may simultaneously serve as precipitant after the end of polycondensation for the polymer dissolved in the organic liquid phase. The different solvents then employed in the process, for instance water, acetone and the chlorinated hydrocarbon may be separated by rectification and be used again.
Inventors:
Healthy, Otto
Application Number:
JP50047989A
Publication Date:
June 06, 1991
Filing Date:
December 07, 1989
Export Citation:
Assignee:
Isonova, Tehnishier, Inovatuionen, Gezershyaft, Mitt, Besilenktel Haftung
International Classes:
C08G63/19; C08G63/193; C08G63/79; (IPC1-7): C08G63/79
Foreign References:
| US3988232A | 1976-10-26 |
Attorney, Agent or Firm:
Heiyoshi Odashima