Polyoxymethylene molding composition, useful for extrusion and molding, includes heterocyclic stabilizer, carboxylate salt, toughener, hindered phenol and hindered amine light stabilizer

摘要

Molding composition contains 0.01-1.0 wt.% N-containing cyclic stabilizer (I), 0.001-0.5 wt.% carboxylic acid salt (II), 5-50 wt.% toughener (III), 0.0-2.0 wt.% sterically-hindered phenol (IV), 0.0-1.0 wt.% stabilizer(s) (V) of the benzotriazole, benzophenone or aromatic benzoate class, 0.0-0.8 wt.% sterically-hindered amine light stabilizer (VI) and (co)polyoxymethylene (VII) to 100 wt.%. Independent claims are also included for: (a) polyoxymethylene molding compositions containing 0.03-0.3 wt.% (I), 0.001-0.5 wt.% (II), 5-40 wt.% (III), 0.1-1.0 wt.% (IV), 0.0-0.8 (V), 0.0-0.5 wt.% (VI), and (VII) to 100 wt.%; (b) polyoxymethylene molding compositions containing 0.01-1.0 wt.% (I), 0.001-0.5 wt.% (II), 7-30 wt.% (III), 0.2-1.0 wt.% (IV), 0.0-1.0 (V), 0.4 wt.% (VI) and (VII) to 100 wt.%; and (c) moldings made from these compositions.