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WESTON™ 619F
Highly effective, phosphite-based color and molecular weight stabilizer for polymers, elastomers, and adhesives, similar to WESTON™ 618F but with improved hydrolytic stability.
WESTON™ 619F is a phosphite antioxidant similar to WESTON™ 618F with improved hydrolytic stability. It is highly effective at stabilizing color and molecular weight for a variety of polymers, elastomers, and adhesives. WESTON™ 619F contributes to the thermal and UV stability of these materials as well.
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: 37-46 °C Molecular Weight: 732 g/mol
Primary Chemistry: Distearyl Pentaerythritol Diphosphite
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 and UV stability of adhesives and elastomeric formulations Synergy and incompatibility issues of phosphite antioxidants with benzophenone and benzotriazole light stabilizers
Applications
Polyolefins, polyesters, elastomers, styrenics, engineering thermoplastics, and adhesives
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.
Explore our extensive range of Antioxidants, Polymer Modifiers, and UV Stabilizers from SI Group explicitly designed for the wire and cable industry and plastic applications. The SI Group team in ChemPoint is available for any technical questions or product recommendations that meet your specific application needs.
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ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
Thank you
Thank you for your inquiry and interest in ChemPoint. We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
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