VERFAHREN ZUR STABILISIERUNG VON POLYPHENYLENSULFID GEGEN THERMISCHEN ABBAU UND AUSGASUNGEN ORGANISCHER SUBSTANZEN.

摘要

Polyphenylene sulphide (PPS) is stabilised against thermal degradation and out-gassing or organic substances by addn. of active carbon powder (I) as stabiliser. Amt. of (I) added is 1-2%; a keto gp.-contg. polymer (II) or polyimide of about the same thermal stability as PPS is added, in combination with up to 5% (I); (II) is an aromatic ketone, pref. poly-1, 4-oxyphenyloxy-p, p'-benzophenone, and amt. of (II) is up to 5 wt. % (pref. up to 1 wt.%), with 2 wt.% (I); condensable, oligomeric ketones or imides capable of resonance are added either to the starting materials or during the roasting process and copolymerised into the polymer chain, before adding (I); alternatively, up to 5% of an equally stable polymer with aromatic amine gps., esp. polyvinylcarbazole, is added, together with 2% (I); 1% alkali carbonate, pref. Li2CO3, is also added.