Process for producing a copolyester

Details Process for producing a copolyester Process for producing a copolyester

1987-01-06

1988-11-01

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528194, 528179, 528302, 525444, 525448, 525437, C08G 6302, C08G 6318, C08G 6316, C08F 2000

Patent

active

047821329

ABSTRACT:
A process for producing a copolymeric polyester, which comprises a first step of preparing a copolymeric oligomer by reacting a starting material oligoester or polyester having repeating units of the formula: ##STR1## wherein R.sub.1 is a divalent aromatic hydrocarbon group having from 6 to 10 carbon atoms, a divalent alicyclic hydrocarbon group having from 4 to 20 carbon atoms or/and a divalent aliphatic hydrocarbon group having from 1 to 40 carbon atoms (provided a hydrogen atom in the aromatic ring of the aromatic hydrocarbon group may be substituted by a halogen atom or an alkyl or alkoxy group having from 1 to 4 carbon atoms), and R.sup.2 is a divalent aliphatic hydrocarbon group having from 2 to 40 carbon atoms, a divalent alicyclic hydrocarbon group having from 4 to 20 carbon atoms, or a divalent radical of polyalkylene oxide having a molecular weight of from 80 to 8000, in an amount from 5 to 95 mol % as represented by the amount of the repeating units constituting the oligoester or polyester, with from 5 to 95 mol % of a hydroxycarboxylic acid of the formula:

REFERENCES:
patent: 4035356 (1977-07-01), Jackson, Jr. et al.
patent: 4285852 (1981-08-01), East
patent: 4390681 (1983-06-01), Deex
patent: 4542203 (1985-09-01), Ueno et al.
patent: 4560740 (1985-12-01), Ueno et al.
patent: 4600764 (1986-07-01), Dicke et al.

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