NAUGARD® PHR phosphite

NAUGARD® PHR phosphite by SI Group is phosphite antioxidant. It is used as a stabilizer of rubber at levels of 1-1.5 phr RHC and plastics at <0.5% in combination with phenolic antioxidants. This additive is also used as a stabilizer for SBR, BR, NBR and EPDM (Royalene®) polymers. NAUGARD® PHR phosphite prevents resinification of the polymer during manufacturing and storage. This non-staining and non-discoloring additive protect polymers against heat and oxygen degradation during processing. It is FDA approved. The shelf life of the product is one year.