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Phosphites are efficient decomposers of hydroperoxides that are formed during the autooxidation of polymers. Phosphites are especially used in melt processing where they are added in blends with hindered phenolic antioxidants. Such combinations are more effective than hindered phenol alone.

Specialty additives
ADK STAB 135A
ADK STAB 135A is an organophosphite processing stabilizer.
Specialty additives
ADK STAB 3010
ADK STAB 3010 is a trialkylphosphite having excellent thermal stability. 
Specialty additives
ADK STAB 517
ADK STAB 517 is a liquid phosphite.
Specialty additives
ADK STAB 2112
ADK STAB 2112 is organophospite processing stabilizer having particularly resistance to hydrolysis. As a secondary antioxidant, ADK STAB 2112 extends the performance of primary antioxidants and protects the polymer from molecular weight change and discoloration.
Specialty additives
ADK STAB PEP-36
ADK STAB PEP-36 provides excellent process stability and colour improvement at high temperatures. ADK STAB PEP-36 is suitable for polypropylene, polyethylene, ABS, engineering plastics, etc. ADK STAB PEP-36 may be used in olefin polymers for food packaging applications.
Specialty additives
ADK STAB HP-10
ADK STAB HP-10 provides excellent colour and melt stability during polymer processing as well as good hydrolytic stability. ADK STAB HP-10 is suitable for polyolefins, ABS, PS, engineering plastics and other polymers.
Specialty additives
CCP STAB 628
CCP STAB 628 is an effective liquid phosphite recommended for color improvement and heat stability for PUR and PVC.
Specialty additives
CCP STAB 3012
CCP STAB 3012 is a liquid phosphite antioxidant recommended for heat stability and color stability for PUR and PVC.
Specialty additives
CCP STAB AS-4500
CCP STAB AS-4500 is a high performance liquid phosphite providing excellent heat stability and color retention in many polymers, in particular PVC and styrenics.