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WESTON™ 439
WESTON™ 439 is a phosphite ester antioxidant designed to improve the color, clarity, and light stability of PVC and vinyl chloride copolymers.
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- 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™ 439 is a phosphite ester antioxidant that improves the color, light stability, and optical transparency of PVC and vinyl chloride copolymers. WESTON™ 439 offers high performance for PVC when used alongside primary metal stabilizers and epoxy stabilizers.
Specifications
Form: Liquid
Color: Clear
CAS number: 96152-48-6
Color (Pt-Co): 50 max
Acid number: 0.20 mg KOH/g max
Refractive index @ 25°C: 1.5040–1.5095
Phosphorus content: 5.4%
Specific gravity @ 25°C: 0.965–0.990
Vapor Pressure @ 6 mm Hg: 175°C
Flash point (closed cup): 177°C
Soluble: Most common aprotic organic solvents
Insolubility: Wate
Primary Chemistry: Poly 4,4' isopropylidenediphenol C12-15 alcohol phosphite
Features & Benefits
- Approved for food contact when used in PVC
- Improves optical transparency
- Soluble in most common aprotic organic solvents
- Synergizes with primary metal stabilizers and epoxy stabilizers
Problems Solved
Clarity or color stability issues in PVC or vinyl polymers Degradation or staining in PVC when exposed to light or processing temperatures
Applications
Packaging Consumer goods Building and construction Automotive Appliances Windows Decks Flooring Fences
Related Chemistries
Plastics
Related End Markets
Elastomers
Metal Processing & Fabrication
Plastics
Related Functions
Adhesives
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