Select Your Region
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.
Fulfilled By ChemPoint
- Manufacturer: SI Group
- Product Line: SI Group Phosphite Antioxidants
- Product: WESTON™ Liquid Phosphite Ester Antioxidants
- Industries: Adhesives | Elastomers | Metal Processing & Fabrication | Plastics | Silicones
- Authorized Countries: Canada | Mexico | United States
Documents
Package Sizes
Quantity
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
Silicones
Related Functions
Adhesives
SI Group Phosphite Antioxidants Articles
SI Group WESTON™ Liquid Phosphites
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.
Antioxidant and UV Stabilizers for TPO Membranes
The SI Group's extensive portfolio of specialty antioxidants and UV stabilizers holds the solution to your TPO roof membrane formulating challenges.
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
Have questions? Can't find the right product?
Ask our Experts
When You're Ready
Get a Quote
Ask a Question
Request a Sample
Request a Document
Document Download
Thank you
Your document download will begin shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
Thank you
Thank you for your inquiry and interest in ChemPoint.
We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
Thank you
Thank you for your inquiry and interest in ChemPoint.
We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
Document Download
The document currently is provided in the following languages from the supplier at this time.
Document Download
The document currently is provided in the following languages from the supplier at this time.
Are you in the correct region?
We’ve detected that you are located in a different region than the region selected on the website. Would you like to change your region?
Current Region: English - Mexico
