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WESTON™ 398
Versatile phosphite stabilizer that improves color, processing stability, and end-use of a variety of polymers.
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- 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
Fulfilled By ChemPoint
Fulfilled By ChemPoint
Manufacturer
Product Line
Authorized Countries
Canada
Mexico
United States
Overview
WESTON™ 398 is a phosphite antioxidant that improves color and processing stability during recovery, drying, compounding, processing and end use. It has low nonylphenol content and synergizes when used along side hindered phenolic antioxidants.
Specifications
Appearance: Clear liquid
Specific Gravity @ 25 °C: 0.980-0.992
Color (Pt - Co): 75 max
Flash Point (Closed Cup): 196 °C
Density @ 25 °C: 0.98 g/mL
Vapor Pressure @ 6 mm Hg: 245 °C
Molecular Weight: 688 g/mol
Viscosity @ 60 °C: 250 cps
Acid Number: 0.25 mg KOH/g
Refractive Index @ 25 °C: 1.5250-1.5280
Free Nonylphenol Content: ≤0.1
Phosphorus Content: 4.1-4.5%
Chlorine Content: Free Phenol Content: Specific Heat: 0.4 mcal/mg°C
Thermal Conductivity: 0.0003 gcal/sec(cm²)(°C/cm)
Auto-ignition Temperature: 439 °C
Primary Chemistry: Trisnonylphenyl Phosphite
Features & Benefits
- Low color
- Low nonylphenol content
- Synergizes when used along side phenolic antioxidants
Problems Solved
High concentration of nonylphenols in liquid phosphite antioxidants
Staining and coloring issues with the use of phosphite antioxidants
Compatibility and processability of phosphite antioxidants in HDPE and LLDPE applications
Applications
High density polyethylene, linear low density polyethylene
Related Chemistries
Plastics
Related End Markets
Elastomers
Metal Processing & Fabrication
Plastics
Related Functions
Adhesives
SI Group Phosphite Antioxidants Articles
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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