Production & Quality
3 Aufrufe
MP products yellowing after processing
Problembeschreibung
MP products gradually yellow on the surface after 1 week of storage, color difference ΔE>3
Ursachenanalyse
incomplete antioxidant system, thermal oxidative degradation produces yellow products; UV irradiation accelerates photo-oxidation; residual transition metal catalysts catalyze oxidation
Lösung
1) improve the antioxidant system 1010(0.1)+168(0.1)+DSTDP(0.2)wt%; 2) add UV absorber 0.2-0.5wt%; 3) add metal deactivator 0.05wt%; 4) select low-residue raw material grades
Wichtigste Erkenntnis
yellowing is caused by thermal/photo-oxidation and metal catalysis; improving the antioxidant system and UV absorber is key
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!