Naugard PHR Tris(mono-nonylphenyl) phosphite Chemtura (Crompton-Uniroyal Chemical) Antioxidant >> Lactone Insoluble in water Miscible in most organic solvents NAUGARD PHR Antioxidant Tris(mono-nonylphenyl) phosphite (HR grade contains up to 1% triisopropanol amine for improved hydrolysis resistance.) Used as a stabilizer for SBR, BR, nitrile (Paracril ® ) Rubbers & EPDM (Royalene ® ) polymers. Prevents resinification of the polymer during manufacturing and storage. Protects polymers against heat and oxygen degradation during processing. Nonstaining and nondiscoloring. Stabilizer of rubber at levels of 1 to 1.5 phr RHC and plastics at <0.5% in combination with phenolic antioxidants. Effective nondiscoloring and nonstaining stabilizers. Minimize gel build-up during processing. Provide unusually good properties when used in combination with amine or phenolic type antioxidants. Naugard® PHR available as both liquid and 70% active powder. 175.300 – Resinous & Polymer Coatings – (Can End Cement) Nondiscoloring and nonstaining tris(mono-nonylphenyl) phosphite with triisopropanol amine. Used as a stabilizer for SBR, BR, nitrile rubbers and EPDM polymers in coatings. Prevents resinification of the polymer during manufacturing and storage. Offers protection against heat and oxygen degradation and reduces gel build-up during processing. Can be used in combination with amine or phenolic type antioxidants. Gives improved hydrolysis resistance.