| 摘要 |
FIELD: polymer materials. SUBSTANCE: polymer product contains polymer material, about 50 to about 5000 ppm of at least one ortho-hydroxytris(arylthazine) light absorber, and about 500 to about 12500 ppm of at least one oligomeric, polymeric, or high-molecular sterically-hindered amine light stabilizer with molecular weight at least 500, weight ratio of sterically-hindered amine to triazine ranging from about 3:1 to about 20:1. Polymer product is a molded product, extruded product, or biaxially-oriented band or film. Light-stabilizing additive composition includes above-defined ingredients of polymer product. EFFECT: prolonged time of protection against destruction from UV emission. 19 cl, 1 tbl, 6 ex |
