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Hindered amines show excellent UV protection by scavenging free radicals generated by photo degradation. When to use HALS or other light stabilizers depends on the processing requirements and demands of the end user. In some cases, combinations of light stabilizers have shown superior performance.

In general terms, stabilizers containing sterically hinderd amines, HALS are very efficient at scavenging free radicals and thus prevent these species from reacting and causing degradation of polymer chains.

Specialty additives
LA-402AF is a new very high performance light stabiliser based on a low migrating HALS in a synergistic blend. Particularly suitable for filled and pigmented polyolefins
Specialty additives
ADK STAB LA-402XP and ADK STAB LA-402Si are highly efficient light stabilizers based on a synergistic HALS blend. Offered in either a PP masterbatch form or on a synthetic silica carrier, they allow easy blending with base resins. Preferred uses include, but are not limited to, filled and pigmented polyolefins, predominantly polypropylene.   They provide a high level of UV protection and hence the final article resists UV degradation for extended periods of time.
Specialty additives
ADK STAB LA-402Si is a light stabilizer concentrate (50% on silica) based on secondary low molecular weight HALS. Highly effective in filled and/or pigmented formulations. Particularly recommended for automotive PP interior and exterior parts
Specialty additives
ADK STAB LA-52SC is a highly effective N-methylated HALS (hindered amine light stabilizer). In PP this light stabiliser shows a high level of bloom and fogging resistance. ADK STAB LA-52SC is especially recommended for filled and pigmented polymer formulations.
Specialty additives
ADK STAB LA-502 is a propriety light stabiliser taking advantage of advanced alkylated HALS technology to povide state-of-the-art protection in filled and pigmented formulations for interior automotive application.
Specialty additives
ADK STAB LA-63P is an oligomeric, high molecular weight HALS (hindered amine light stabiliser) capable of protecting a variety of polymers. ADK STAB LA-63P is N-methylated and demonstrates excellent performance in many applications and especially when used in sealants and thin films.
Specialty additives
PALMAROLE HALS 92 is a hindered amine light stablizer for use in polymers, coatings and adhesives.
Specialty additives
PALMAROLE HALS 77 is a hindered amine light stabiliser (HALS) suitable for most polymers.
Specialty additives
PALMAROLE HALS 62 is a light stabilizer based on an oligomeric polymer. 
Specialty additives
PALMAROLE HALS 94 is an oligomeric, sterically hindered amine light stabiliser particularly useful for the protection of polymers used in automotive applications.