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Nonylphenol-free phosphite antioxidant, designed as a drop-in replacement for TNPP with a 20% lower loading rate.




Product Overview

WESTON™ 705 is an industry pioneering phosphite stabilizer which is free of nonylphenol. It can be used in a variety of polymer systems such as HDPE, LLDPE, SBR, NBR, SBC, SBS, ABS, PVC. WESTON™ 705 reduces both plate-out and gel formation by a factor of 10. Based on proprietary chemistry and technology, it has been developed to replace TNPP in food-contact applications.

Product Specifications

Appearance: Colorless liquid free of particulates
Phosphorus Content: 5.2%
Assay: > 98%
Specific Gravity (@ 25°C, @ 15°C): 1.004, 1.035
Acid Number: <0.5 mg KOH/g
Primary Chemistry: Proprietary Phosphite

Features & Benefits

Drop-in replacement for TNPP, able to reduce loading by 20% while matching TNPP performance
Superior solubility in PE
Compared to AO168/ALKANOX® 240:
Tenfold reduction in plate-out
Tenfold reduction in gel formation
90% less additive blooming
Threefold improvement in melt flow
allows for increased usage of regrind
Threefold improvement in color retention
upon exposure to NOx gas
Broad food contact approvals


Food packaging

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SI Group Phosphite Antioxidants

SI Group Phosphite Antioxidants are solid and liquid secondary antioxidants that work in a variety of systems.

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