Verfahren zur Herstellung hochmolekularer Polyester

摘要

The object of the invention is to prepare a high-molecular-weight polyester in such a way that it is possible to make even relatively small amounts of very high molecular weight available in a very short time in an advantageous manner. This is achieved by the preparation of a polyester containing an alkenediol by carrying out the polycondensation step to a viscosity number of from 5 to 150 cm<3>/g and subsequently subjecting the resultant polyester to treatment with ionising radiation until the requisite viscosity number has been reached. The process according to the invention enables high-molecular-weight polyesters having the desired property profile to be obtained.