Method for preparation of macrocyclic poly(alkylene dicarboxylat

Details Method for preparation of macrocyclic poly(alkylene dicarboxylat Method for preparation of macrocyclic poly(alkylene dicarboxylat

1992-10-22

1993-07-27

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528302, 528308, 5283086, 528397, 525437, 525444, 524186, 524236, 524320, 524601, 524605, 524714, 524717, C08G 6320

Patent

active

052311619

ABSTRACT:
Macrocyclic poly(alkylene dicarboxylate) oligomers are prepared in high yield by the reaction of a dicarboxylic acid chloride such as terephthaloyl chloride with at least one bis(hydroxyalkyl) ester such as bis(4-hydroxybutyl) terephthalate, in the presence of a highly unhindered amine or a mixture thereof with at least one other tertiary amine such as triethylamine, in a substantially inert organic solvent such as methylene, chlorobenzene or a mixture thereof. The concentration of the reagents in the reaction mixture are at least 0.08M.

REFERENCES:
patent: 4217438 (1980-08-01), Brunelle et al.
patent: 4368315 (1983-01-01), Sikdar
patent: 4433117 (1984-02-01), Takayanagi et al.
patent: 5039783 (1991-08-01), Brunelle et al.
patent: 5157103 (1992-10-01), Kantor et al.

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