| abstract |
The present invention provides a masterbatch method fornproducing a polyester resin and articles thereof; comprisingnreacting following materials uniformly at a temperaturenequal to or greater than the melting point of a polyester,nthe materials comprising: (1) 100 parts by weight ofnsaturated straight-chain polyester A; (2) 1 to 10 parts bynweight of binder masterbatch D comprising: a mixturencontaining a compound having two epoxy groups and a compoundnhaving an average number of epoxy groups of 2.1 or more; (3)n0.25 to 10 parts by weight of catalyst masterbatch Gncomprising: a metal carboxylate, whereby the melt viscositynof the polyester increases so that the melt flow rate (MFR)nbecomes 50 g/10 min or less, and the degree of swelling ofnthe polyester increases to between 5% and 200%, thusnresulting in a high-quality resin having excellentnmechanical properties. The resin can be advantageously usednfor films, sheets, foamed materials, pipes, cushioning, heatninsulators, packing materials, and so forth. |