Process for the production of a carbonate polyester (co)polymer
AssigneeAvantium Knowledge Centre B.V.
InventorsKevin van der Maas, Bing Wang, Robert-Jan Van Putten, Gerardus Johannes Maria Gruter
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for the production of a carbonate polyester (co)polymer which includes the use of bis(2-methoxyphenyl) carbonate to introduce carbonate monomer units into the polymer chain. The process is an efficient process for the production of novel and existing carbonate polyester (co)polymers, also with high molecular weight, and optionally without the need for the addition of a metal catalyst.
Claims15
A process for the production of a carbonate polyester (co)polymer, comprising the use of bis(2-methoxyphenyl) carbonate to introduce carbonate monomer units into the polymer chain, comprising at least steps (a) and (b):
- (a) an esterification/transesterification step wherein at least one dicarboxylic acid or an ester derivative thereof is/are reacted with an excess of at least one diol compound to form a pre-polycondensation product having predominantly alcohol end groups, or otherwise producing such pre-polycondensation product;
- (b) a polymerization step comprising polycondensation of the product of step (a) with bis(2-methoxyphenyl) carbonate in a molar amount of at most 0.5 equivalents of the molar amount of alcohol end groups in the pre-polycondensation product of step (a).
Dependencies are inferred from the claim text.