Patent ID: 6630542
Filing Date: 2003-10-07
Classification: C08J,C08L

Abstract:
A process for preparing aromatic polyester resins containing less than 15 wt % of a polyarylene amide by dilution of a masterbatch of a polyarylene amide in an aromatic polyester resin containing from 10 to 40 wt % of polyarylene amide wherein the masterbatch is prepared by mixing in the molten state, an aromatic polyester resin with a dianhydride of a tetracarboxylic acid, in a quantity of from 0.05 to 2% by weight, under conditions to disperse the polyarylene amide in the polyester resin matrix in the form of domains having average size of less than 1 micron and the masterbatch thus obtained is melt-mixed with the polyester resin.