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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
WESTON™ 619F
Fulfilled By ChemPoint
SKU
0113974
WESTON™ 619F is a highly effective, phosphite-based color and molecular weight stabilizer for polymers, elastomers, and adhesives. It is similar to WESTON™ 618F but with improved hydrolytic stability.
Package Sizes
Quantity
Documents
Specifications
Appearance: White flakes
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): 188°C
Bulk density: 0.43 g/mL
Melting point: 37°C–46°C
Molecular weight: 732 g/mol
Primary Chemistry:
Distearyl pentaerythritol diphosphite
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Conor Robertson, Technical Specialist
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Authorized Countries
Canada
Mexico
United States
Overview
WESTON™ 619F is a phosphite antioxidant similar to WESTON™ 618F but with improved hydrolytic stability. It is highly effective at stabilizing color and molecular weight for a variety of polymers, elastomers, and adhesives. WESTON™ 619F also contributes to the thermal and UV stability of these materials.
Features & Benefits
- Food contact approvals
- 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
Problems Solved
Low hydrolytic stability of solid phosphite antioxidants
Discoloration issues in polymeric formulations caused by TiO2 pigments
Poor thermal or UV stability of adhesives or elastomeric formulations
Synergy or incompatibility issues of phosphite antioxidants with benzophenone or benzotriazole light stabilizers
Applications
Polyolefins, polyesters, elastomers, styrenics, engineering thermoplastics, and adhesives
Related Chemistries
Plastics
Related End Markets
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