PROCESS FOR THE PREPARATION OF POLYSTER FOR MAT-FILM

摘要

In prepn. of plyester by reacting at least one of twofunctional acidic component or alkyl ester cpd. of two-functional acidic component with at least one of alkylene alycol, a polyester for nonglossy mat-film is prepd. by admixing at least one of inorg. cpds. 2.1-20 wt.% (w.r.t. alkyl ester) of 1-30 micro m ave. diameter, which is prepd. in a system other than of the reaction system, at the time of polycondensation reaction of the monomer obtd. after the ester exchange reaction to be terminated, when the reaction ratio of polycondensaation is 30-90% ( degree of polymn. is 1.5-10).