abstract |
(57) Abstract: [PROBLEMS] To provide a modified polyester composition which is improved in hydrolysis resistance, heat resistance and hue, and has a small amount of insoluble foreign matter mixed in, or a cationic dyeable polyester composition. SOLUTION: A polyester composition comprising (A) an aromatic polyester or an aromatic polyester modified with a specific phosphonic acid phosphonium salt and (B) a reaction product of a specific phosphorus compound and an epoxy compound, and a production thereof. Method. |