| 摘要 |
The copolyetherester elastomeric polymer is prepared by reacting (A) aromatic dicarboxylic acid and glycol as main components, (B) phenolic compound as an antioxidant, (C) at least one compound selected from the primary light stabilizer group composed of 2-hydroxybenzotriazol, 2-hydroxybenzophenone, oxanylide, acrylic acid ester and aromatic salicilic ester and (D) amine based light stabilizer of formula (I) as a secondary light stabilizer. In the formula, n is an integer of 3 to 30, R1 and R2 are C1-25 alkyl, C6-25 akylene, C3-12 cycloalkylene or C1-18 hydroxy alkyl or its ester group. The glycol comprises 5-25 mole% polyakylene oxide glycol and 75-95 mole% low molecular weight diol, and the diol consists of 50-100 mole% 1- 4-cyclohexanedimethanol and 0-50 mole% aliphatic diol. |
