Specialty alkyl phosphite antioxidant that effectively stabilizes heat, color and viscosity in a variety of polymers.
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WESTON™ 430 is a specialty alkyl phosphite antioxidant that is particularly effective at stabilizing color, as well as heat and viscosity in polymers such as polyester fibers. It has a hydroxyl number of 395 mg KOH/gm.
Appearance: Clear liquid
Specific Gravity @ 25 °C: 1.088-1.098
Molecular Weight: 430 g/mol
Color (Pt - Co): 50 max
Acid Number: 0.20 mg KOH/g max
Refractive Index @ 25 °C: 1.4600-1.4635
Viscosity @ 38 °C: 42.2 cps
Phosphorus Content: 7.2%
Density @ 25 °C: 1.09 g/mL
Vapor Pressure @ 10 mm Hg: 145 °C
Flash Point (Closed Cup): 118 °C
Primary Chemistry: Tris (dipropylene glycol) phosphite
Excellent color stability
Stabilizes viscosity
Poor color stability and staining with the use of traditional phosphite and phosphite ester stabilizers
Limited viscosity control in the processing of polyesters and polyolefin products
Polyester fibers
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