Light stabilizers, aromatic amines

The indole- and benzindole-cyanine dyes illustrated in Scheme 6 are used by many major manufacturers in optical disk recording applications. These types of dye tend to be more light-stable than many other readily synthesized polymethine dyes. To increase the photostability, the dyes are used in combination with various types of stabilizers such as nickel dithiolato complexes and selected tertiary aromatic amine compounds.199 The application of cyanine dyes for optical storage media was primarily developed in Japan203 and several dyes and compatible stabilizers are commercially available in pure form from Japanese suppliers.199... 

Aromatic Polyester Polyurethane. The hindered-amine light stabilizer (LS-1) or a 1 1 blend of LS-1 and LS-2 provided about five to six times better performance than the best UV absorber (LS-2) alone in... 

The additional reaction of additives in the polyolefin due to an increased temperature or light providing more efficient stabilizer. Example aromatic amines + mercaptobenzimidazol. 

Cyclic hindered amines are applicable as light stabilizers for most polymers. Aromatic and heterocyclic amines have a crucial importance for stabilization of PO rubbers and coatings. They have antioxidant, anti-... 

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