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WESTON™ 618F
WESTON™ 618F is a highly effective, phosphite-based color and molecular weight stabilizer for polymers, elastomers, and adhesives.
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- Manufacturer: SI Group
- Product Line: SI Group Phosphite Antioxidants
- Product: WESTON™ Solid Phosphite Antioxidants
- Industries: Adhesives | Elastomers | Plastics
- Authorized Countries: Canada | Mexico | United States
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Fulfilled By ChemPoint
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Canada
Mexico
United States
Overview
WESTON™ 618F is a phosphite antioxidant that is highly effective at stabilizing color and molecular weight for a variety of polymers, elastomers, and adhesives. WESTON™ 618F offers both thermal and UV stability while reducing discoloration in polymers containing titanium dioxide pigments (TiO2).
Specifications
Form: Flakes
Color: White
CAS number: 3806-34-6
Molecular formula: C41H82O6P2
Specific gravity @ 15.5°C: 0.92–0.935
Acid number: 1.0 mg KOH/g
Refractive index @ 60°C: 1.456–1.459
Phosphorus content: 7.8%–8.2%
Flash point (closed cup): 185°C
Bulk density: 0.43 g/mL
Melting point: 37°C–46°C
Molecular weight: 732 g/mol
Primary Chemistry: Distearyl pentaerythritol diphosphite
Features & Benefits
- FDA food contact approvals
- Broad range of solubility in most common aprotic organic solvents
- Excellent color stability during processing, fabrication, and end use
- Synergizes when used with benzophenone and benzotriazole light stabilizers
- Reduced discoloration of polymers containing pigments like TiO2
- High performance at low loading levels
- Reduces discoloration of polymers with high processing temperatures that are stabilized with a sulfur-containing nickel-organic complex
- Compatible with polyolefins (such as LDPE and LLDPE), polyesters, elastomers, styrenics, and engineering thermoplastics
Problems Solved
Discoloration or color stability issues of polymers caused by TiO2 pigments Low thermal or UV stability of adhesives or elastomeric formulations Synergy issues of phosphite antioxidants with benzophenone or benzotriazole light stabilizers
Applications
Adhesives Automotive Coatings Paints Sealants Packaging and packaging films Aerospace Furniture Marine Tapes and labels Healthcare devices
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