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WESTON™ PDDP
WESTON™ is an alkyl-aryl phosphite ester antioxidant that provides color and processing stability in polymers that do not require food contact approvals. It is similar to WESTON™ DPDP but with a higher molecular weight and lower phosphorus content.
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Documents
- Manufacturer: SI Group
- Product Line: SI Group Phosphite Antioxidants
- Product: WESTON™ Liquid Phosphite Ester Antioxidants
- Industries: Adhesives | Elastomers | Metal Processing & Fabrication | Plastics
- Authorized Countries: Canada | Mexico | United States
Fulfilled By ChemPoint
Fulfilled By ChemPoint
Manufacturer
Product Line
Authorized Countries
Canada
Mexico
United States
Overview
WESTON™ PDDP is an alkyl-aryl phosphite ester antioxidant that provides color and processing stability in polycarbonate, polyurethanes, ABS polymers, PET fibers, and coatings. It also functions as a secondary antioxidant in PVC.
Specifications
Appearance: Clear liquid
Specific gravity @ 25°C: 0.938–0.947
Acid number: 0.05 mg KOH/g
Refractive index @ 25°C: 1.4780–1.4810
Phosphorus content: 7.1%
Color (APHA, Pt-Co): 50 max
Molecular weight: 438 g/mol
Flash point (closed cup): 182°C
Viscosity @ 38°C: 12.0 cps
Density @ 25°C: 0.94 g/mL
Vapor pressure @ 5 mm Hg: 190°C
Soluble: Most common aprotic organic solvents
Insoluble: Water
Primary Chemistry: Phenyl diisodecyl phosphite
Features & Benefits
- Functions as a secondary antioxidant for color and heat stability in PVC
Problems Solved
Low phosphorus content or molecular weight in phosphite ester antioxidants or stabilizers Heat or color stability issues in non-food PVC polymers or applications
Applications
PET fiber
Related Chemistries
Plastics
Related End Markets
Elastomers
Metal Processing & Fabrication
Plastics
Related Functions
Adhesives
SI Group Phosphite Antioxidants Articles
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SI Group WESTON™ Phosphite Antioxidants
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.
Stabilization and Processing of Recycled Plastics
Compounders and recyclers face multiple challenges with the stabilization and processing of recycled plastics. Learn more and explore our solutions
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