Diaryl phosphite ester antioxidant with a high phosphorus content and relatively low molecular weight. Improves color and light stability in polymers that do not require food contact.
WESTON™ DPP is a phosphite ester antioxidant that improves color and light stability in polyolefins and other polymers that do not require food contact approvals. It has a high phosphorus content, relatively low molecular weight and can be used to prevent plate-out in PVC.
Appearance: Clear liquid
Specific Gravity @ 25 °C: 1.200-1.220
Acid Number: 15.0 mg KOH/g
Refractive Index @ 25 °C: 1.5550-1.5575
Phosphorus Content: 11.6-12.0%
Color (APHA, Pt/Co): 50 max
Molecular Weight: 234 g/mol
Flash Point (Closed Cup): 143 °C
Viscosity @ 38 °C: 10.5 cps
Density @ 25 °C: 1.21 g/mL
Vapor Pressure @ 5 mm Hg: 140 °C
Soluble: Most common aprotic organic solvents
Insoluble: Water, with hydrolyze in the presence of water
Primary Chemistry: Diphenyl Phosphite
Prevents plate-out in PVC
Low phosphorus content of traditional diphenyl phosphite antioxidants
Low color and light stability in non-food plastic and polymer applications
Plate-out and degradation issues in PVC plastics
Unsaturated polyesters
The portfolio of WESTON™ liquid phosphite antioxidants offers excellent synergism, improved color, and processing stability and offers a variety of food contact approvals depending on your plastic applications.
The SI Group portfolio of WESTON™ phosphite antioxidants protects plastics and elastomers from peroxide decomposers and offers excellent synergism with primary antioxidants, such as hindered phenols.
SI Group offers a broad range of plastic additives for the stability and durability of your packaging plastics. Learn more today!
Compounders and recyclers face multiple challenges with the stabilization and processing of recycled plastics. Learn more and explore our solutions
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