WESTON™ TPP is a versatile aryl phosphite ester antioxidant that regulates viscosity, improves color, and prevents scorch in a variety of polymers.
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WESTON™ TPP is a phosphite ester antioxidant that can be used in a variety of materials, including adhesives, coatings, styrenics, and polyurethanes, to improve color stability, prevent scorch, and regulate viscosity. It acts as a catalyst adjuvant when used in polyolefins.
Appearance: Clear liquid
Specific gravity @ 25°C: 1.180–1.186
Acid number: 0.20 mg KOH/g max
Refractive index @ 25°C: 1.5880–1.5900
Phosphorus content: 10%
Color (APHA, Pt-Co): 50 max
Molecular weight: 310 g/mol
Flash point (closed cup): 146°C
Viscosity @ 38°C: 10.2 cps
Density @ 25°C: 1.18 g/mL
Vapor pressure @ 5 mm Hg: 205°C
Soluble: Most aprotic organic solvents
Insoluble: Water
Primary Chemistry: Triphenyl phosphite
Regulates viscosity and improves color stability in polyester
Catalyst adjuvant in polyolefins
Prevents scorch during curing in polyurethanes
Scorch or color-stability issues in coatings, adhesives, styrenics, or polyurethanes
Viscosity changes or limited control in polyester formulations
Styrenics
Engineering thermoplastics
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