Nonylphenol-free phosphite antioxidant, designed as a drop-in replacement for TNPP with a 20% lower loading rate. Similar to WESTON™ 705 but with improved hydrostability.
Product Overview
WESTON™ 705T 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. Based on proprietary chemistry and technology, it has been developed to replace TNPP in food-contact applications. It has improved hydrostability when compared to WESTON™ 705.
Product Specifications
Appearance: Colorless liquid free of particulates
Phosphorus Content: 5.0%
Assay: >98%
Specific Gravity @ 25 °C: 1.004-1.035
Acid Number: <0.5 mg KOH/g
TIPA Content: 0.5%
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


exposure to NOx gas
Broad food contact approvals
Problems Solved
High loading rate of traditional TNPP and phosphite antioxidants
Low hydrostability of traditional phosphite antioxidants
Regulatory restrictions for the use of TNPP antioxidants in food contact applications
Nonylphenol in liquid phosphite antioxidants
Food packaging