| 摘要 |
<p>PURPOSE:To obtain a polyurethane composition having excellent color change resistance in gas, light resistance, heat resistance, etc., containing a specific phenolic compound, benztriazole ultraviolet light absorber, hindered amine antioxidant and hydrazine derivative. CONSTITUTION:A polyurethane composition comprising (A) polyurethane, (B) a phenolic compound shown by formula I (R1 is t-butyl, sec-butyl or neopentyl group), preferably 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid and (C) C1: a benztriazole ultraviolet light absorber, C2: a hindered amine antioxidant and C3: a hydrazine derivative containing one or more groups shown by formula II (R1 is H or methyl; R3 is H, monofunctional or bifunctional organic group) and obtained by blending the component A with 0.1-5 pts.wt. component B and 0.2-10wt.% sum of components B and C.</p> |
