POLYMERIZATION OF POLYAMIDES IN THE PRESENCE OF AQUEOUS DISPERSIONS OF PHENOLIC ANTIOXIDANTS

摘要

1276087 Organic dispersions IMPERIAL CHEMICAL INDUSTRIES Ltd 21 May 1969 [18 June 1968] 29019/68 Heading B1V [Also in Division C3] Sterically hindered substantially insoluble phenolic antioxidants are dispersed in water using a surface active compound containing a quaternary ammonium group. Several o-substituted polynuclear phenols and surface active compounds are specified. The antioxidant is incorporated into a polyamide, e.g. polyhexamethylene adipamide by adding the dispersion to the monomer mixture before or during polymerisation.