POLYOXYMETHYLENFORMMASSE MIT ERHOEHTER SCHLAGFESTIGKEIT UND DAMIT HERGESTELLTE GEGENSTAENDE.

摘要

Oxymethylene polymer molding compositions provide articles which exhibit enhanced impact strength properties, especially at low temperatures such as -20 DEG F(-29 DEG C), when such compositions include an elastomeric polyurethane, which is the reaction product of certain proportions of: (i) 4,4 min -methylenebis (phenyl isocyanate), (ii) polyoxytetramethylene glycol having a molecular weight of 1500 to 3000, and (iii) at least one diol extender selected from aliphatic straight chain diols having 2 to 6 carbon atoms, bis (2-hydroxy-ethyl) ether of hydroquinone and, bis (2-hydroxy-ethyl) ether of resorcinol.