NAUGARD™ PHR is a liquid phosphite antioxidant for rubber and polymers that contains up to 1% triisopropanol amine to improve resistance to hydrolysis.
NAUGARD™ PHR is a phosphite antioxidant that protects polymers from degradation resulting from heat and oxygen exposure during processing. It also acts as a stabilizer for synthetic rubbers, such as SBR, BR, and NBR, and prevents resinification during manufacturing and storage. NAUGARD™ P and NAUGARD™ PHR may be interchangeable, with NAUGARD™ PHR being utilized when hydrolysis may occur. This particular grade of antioxidants prevents polymer degradation during the isolation and drying of emulsion rubbers, such as styrene-butadiene rubber (SBR) and nitrile butadiene rubber (NBR).
Form: Viscous liquid
Color: Light yellow
Specific gravity @ 25 °C: 0.98
Viscosity @ 21 °C: ~5200 cps
Primary Chemistry: Tris(mono-nonylphenyl) phosphite
Broad FDA food contact approvals
Nonstaining
Nondiscoloring
Synergizes with phenolic antioxidants in plastics
Stabilizes rubber; use 1 to 1.5 phr rubber hydrocarbon
Stabilizes plastics; use <0.5 wt%
Hydrolysis of phosphite antioxidants in plastic and rubber applications
Degradation of polymers in high-temperature processes
Unwanted resinification during manufacturing or storage
Discoloration or staining with the use of traditional phosphite antioxidants
Pressure-sensitive adhesives
Polymer coatings
Sealing gaskets for food containers
Compounders and recyclers face multiple challenges with the stabilization and processing of recycled plastics. Learn more and explore our solutions
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