Select Your Region
- Manufacturer: SI Group
- Product Line: SI Group Phosphite Antioxidants
- Product: WESTON™ Liquid Phosphite Antioxidants
- Industries: Adhesives | Elastomers | Metal Processing & Fabrication | Plastics
- Authorized Countries: Canada | Mexico | United States
WESTON™ DPP
WESTON™ DPP is a 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.
Quantity
Documents
Specifications
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
- Manufacturer: SI Group
- Product Line: SI Group Phosphite Antioxidants
- Product: WESTON™ Liquid Phosphite Antioxidants
- Industries: Adhesives | Elastomers | Metal Processing & Fabrication | Plastics
- Authorized Countries: Canada | Mexico | United States
Manufacturer
Product Line
Authorized Countries
Canada
Mexico
United States
Overview
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 and relatively low molecular weight and can be used to prevent plate-out in PVC.
Specifications
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
Features & Benefits
- Prevents plate-out in PVC
Problems Solved
Low phosphorus content of traditional diphenyl phosphite antioxidants
Low color or light stability in non-food plastic or polymer applications
Plate-out or degradation issues in PVC plastics
Applications
Unsaturated polyesters
Related Chemistries
Plastics
Related End Markets
Elastomers
Metal Processing & Fabrication
Plastics
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.
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.
SI Group Additives for Packaging Plastics
SI Group offers a broad range of plastic additives for the stability and durability of your packaging plastics. Learn more today!
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
ChemPoint is here to help
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 - United States
