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WESTON™ 705T
WESTON™ 705T is a nonylphenol-free phosphite antioxidant, designed as a drop-in replacement for TNPP with a 20% lower loading rate. This grade is similar to WESTON™ 705 phosphite additive but with improved hydrostability.
SI Group's WESTON™ 705T is an industry-pioneering liquid phosphite stabilizer additive free of nonylphenol. It can be used in various polymer systems, such as HDPE, LLDPE, SBR, NBR, SBC, SBS, ABS, and PVC. This grade is based on proprietary chemistry and technology to replace TNPP in food contact plastics packaging. Weston™ 705T has improved hydrostability when compared to WESTON™ 705.
Specifications
Form: Liquid, free of particulates Color: Clear 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
Nonylphenol-free Drop-in replacement for TNPP, reduces 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 retention allows for increased usage of regrind Threefold improvement in color retention upon 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
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.
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