METHOD FOR PRODUCING POLYESTER COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a polyester composition having improved heat resistance by a rise in glass transition temperature or melting point and remarkably improved thermal and mechanical characteristics such as rigidity, breaking strength or dimensional stability by finely dispersing a new inorganic or organic composite compound into a nanosize in a polyester. SOLUTION: A method for producing the polyester composition is characterized as follows. A specific polyhedral oligometric silsesquioxane (POSS) is added to the polyester having≥0.5 IV (intrinsic viscosity) and the resultant mixture is kneaded when the polyester composed of a bifunctional acid component mainly composed of a dicarboxylic acid and at least one kind of a glycol component is produced. COPYRIGHT: (C)2005,JPO&NCIPI