Process for condensing at least one epoxide on at least one cycl

Details Process for condensing at least one epoxide on at least one cycl Process for condensing at least one epoxide on at least one cycl

1990-03-12

1991-07-09

Nielsen, Earl

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

Synthetic resins

From carboxylic acid or derivative thereof

528 92, 528365, 528366, C08G 6342

Patent

active

050307118

ABSTRACT:
The invention relates to a process for condensing at least one epoxide on at least one cyclic anhydride of a dicarboxylic acid in the presence of a catalyst consisting of at least one titanium nitrogenous complex of the formula (I) Ti(OR.sup.1).sub.m (OR.sup.2 ).sub.n (OR.sup.2 ).sub.p Lg in which R.sup.1, R.sup.2 and R.sup.3 each independently represents one hydrocarbon group, L represents the remainder of a nitrogenous compound, the sum of m+n+p+q is 4, q is an integer from 1 to 4 and m, n and p are independently each 0 or 1. The process allows for obtaining a perfectly alternating polyester.

REFERENCES:
patent: 2742448 (1956-04-01), Beacham et al.
patent: 2809184 (1957-10-01), Langer
patent: 3320193 (1967-05-01), Beck et al.
patent: 4117361 (1978-09-01), Smith et al.
patent: 4973613 (1990-11-01), Paar

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