Project BackgroundA variety of additives are present in polymeric part formulations such as UV screens, antioxidants, hindered amine light stabilizers, etc.. The identity of a specific additive and its loading need to be verified during the manufacturing process or when troubleshooting a product failure. ANALYZE has assayed a wide variety of additives in many polymer formulations across many industry segments.
The ProblemDue to premature product failure, the client wanted to confirm the presence and loading of Tinuvin 783 hindered amine light stabilizer (HALS) in a formed polyolefin part. The Tinuvin 783 was detected and quantified in a polyolefin matrix using high performance liquid chromatography equipped with an ion trap mass spectrometer (HPLC-MS) after solvent extraction of the supplied samples. Tinuvin 783 is a 1:1 mixture of Tinuvin 622 (CAS No. 65447-77-0) and Chimassorb 944 [CAS No. 71878-19-8; 70624-18-9 (US)] hindered amine light stabilizers. Each individual HALS is a series of oligomers.
Structures of the Two Components of Tinuvin 783