Highly effective, phosphite-based color and molecular weight stabilizer for polymers, elastomers, and adhesives.
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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 contributes to the thermal and UV stability of these materials as well.
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): 185 °C
Bulk Density: 0.43 g/mL
Melting Point: 37-46 °C
Molecular Weight: 732 g/mol
Primary Chemistry: Distearyl Pentaerythritol Diphosphite
Discoloration and color stability issues of polymers caused by TiO2 pigments
Low thermal and UV stability of adhesives and elastomeric formulations
Synergy issues of phosphite antioxidants with benzophenone and benzotriazole light stabilizers
Polyolefins, polyesters, elastomers, styrenics, engineering thermoplastics, and adhesives
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