| abstract |
PURPOSE: To provide the subject composition excellent in weather-ability by incorporating therein a specific diol component and a three-component stabilizer comprising a phenolic antioxidant, a light stabilizer suitable for copolyesters and an amine-based light stabilizer as constituents. n CONSTITUTION: The desired polyether ester block copolymer composition comprises (A) a component comprising 5-25 (mol.)% of a polyalkylene oxide glycol and 75-95% of a low-molecular weight diol based on the total glycol content, and (B) a component comprising three components, in combination, of (i) one or more sterically hindered phenolic antioxidants, (ii) one or more light stabilizers suitable for copolyesters represented by formulae I-V, and (iii) one or more sterically hindered amine-based stabilizer represented by formula VI, and has a melt viscosity of 2,700-3,000 psi and an intrinsic viscosity of 1.0-1.5. n COPYRIGHT: (C)1991,JPO |