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Title:
MACROCYCLIC POLYESTER OLIGOMER PREPARATION WITH LEWIS ACID AS CATALYST
Document Type and Number:
Japanese Patent JPH06211975
Kind Code:
A
Abstract:

PURPOSE: To obtain a cyclic poly(alkylene dicarboxylate) oligomeric composition easily and at a low cost by reacting a specific dicarboxylic acid chloride and a specific bis(hydroxyalkyl) ester in an organic liquid solution in the presence of a Lewis acid catalyst.

CONSTITUTION: At least one kind of dicarboxylate of formula I and an almost equal molecular weight of at least one kind of bis(hydroxyalkyl) ester of formula II are contacted in at least one kind of solvent (e.g. chlorobenzene) which is substantially unsaturated in the presence of at least one Lewis acid as catalyst selected from ferric chloride, zinc chloride, zinc bromide, stannous bromide and antimony pentachloride. In formula I and formula II, A represents each independently an m- or p-bonded dihydric monocyclic aromatic group or alicyclic group; R represents an alkylene group or a mono- or poly-oxyalkylene group including linear parts having from about 2 to 8 atoms; and (n) is a value ranging from 1 to about 5.


Inventors:
DANIERU JIYOSEFU BURUNERU
Application Number:
JP28718793A
Publication Date:
August 02, 1994
Filing Date:
November 17, 1993
Export Citation:
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Assignee:
GEN ELECTRIC
International Classes:
C07D323/00; C08G63/16; C08G63/78; C08G63/40; C08G63/82; (IPC1-7): C08G63/78; C08G63/82
Attorney, Agent or Firm:
Tokunji Ikunuma