UV-stabilizer concentrates based on TPU, a process for their production and utilization

摘要

The invention provides UV-stabilizer concentrates, which, relative to the total weight, consist of A) 40 to 80 weight-% of at least one thermoplastic polyurethane B) 10 to 30 weight-% 1,3,5-tri-glycidyl-isocyanurate and C) 10 to 30 weight-% 2-(2-hydroxy-3,5,-di-tert-amyl-phenyl)-2H-benzotriazole and/or 1,6-hexane-di-yl-bis-(3-(3-benzotriazole-N-yl)-4-hydroxy-5-tert-butyl)-phenyl-propanoate. The invention also discloses a process for their production, and their utilization to stabilize TPU against UV- and thermal-degradation.