Process for the preparation of polyesters from aliphatic dicarbo

Details Process for the preparation of polyesters from aliphatic dicarbo Process for the preparation of polyesters from aliphatic dicarbo

1984-06-29

1985-08-13

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528275, 528279, C08G 6344, C08G 7316

Patent

active

045351457

ABSTRACT:
The invention relates to a novel process for the preparation of compounds of the formula I ##STR1## by polycondensation of a diol of the formula II ##STR2## with a dicarboxylic acid ester of the formula III ##STR3## In the above formulae, the substituents and symbols R.sub.1, R.sub.2, R.sub.3 and n are as defined in claim 1.
The process comprises stirring the reaction medium which contains an excess of 2 to 50 mol. %, based on the diol of formula II, of the dicarboxylic acid ester of the formula III, in the presence of at least 0.03 mol. % of a suitable catalyst, until the bulk of the alkanol of the formula R.sub.3 OH formed during the reaction is distilled off, under a pressure of 0.7 to 1.3 bar, and thereafter stirring under a pressure of less than 5 mbar, in the temperature range from 100.degree. to 170.degree. C., and subsequently working up the resultant melt in conventional manner.

REFERENCES:
patent: 4001190 (1977-01-01), Tanikella et al.
patent: 4232131 (1980-11-01), Rody et al.
patent: 4265805 (1981-05-01), Thomas
patent: 4322522 (1982-03-01), Johnson et al.

Affiliated with

Also associated with

Rating

Process for the preparation of polyesters from aliphatic dicarbo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of polyesters from aliphatic dicarbo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of polyesters from aliphatic dicarbo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2319035