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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
ADK STAB LA-52SC
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-63P
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
ADK STAB LA-402AF
ADK STAB 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-502
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-704Si
ADK STAB LA-704Si is a light stabilizer system based on low molecular weight methylated HALS. It is available in a 50% active form on a synthetic silica carrier. ADK STAB LA-704Si is suitable for polyolefin resins such as PP and PE and can also be used in styrenic resins, PA, PMMA and PVA. It combines excellent weatherability with lower fogging and mold staining during processing and provides superior resistance against discoloration from NOx gas exposure.
Specialty additives
ADK STAB LA-502XP
ADK STAB LA-502XP is a synergistic light stabilizer concentrate (50% in polyolefin) based on a methylated HALS, low interaction, particulalry suitable for automotive interior applications.
Specialty additives
ORGATER HALS 62
ORGATER HALS 62 is a light stabilizer based on an oligomeric polymer. 
Specialty additives
ORGATER HALS 77-77G
ORGATER HALS 77 is a hindered amine light stabiliser (HALS) suitable for most polymers.
Specialty additives
ORGATER HALS 94
ORGATER HALS 94 is an oligomeric, sterically hindered amine light stabiliser particularly useful for the protection of polymers used in automotive applications.