Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Addivant WESTON TNPP Antioxidant

Addivant WESTON TNPP Antioxidant is a tri-nonylphenyl phosphite (TNPP)–based secondary antioxidant designed for polyolefins, styrenics, and engineering plastics. It offers exceptional hydrolytic stability, color retention, and processing protection while synergizing with primary antioxidants like hindered phenols. Widely used in PP, PE, ABS, and PC applications.
  • addivant weston tnpp antioxidant_bd8fc427
  • addivant weston tnpp antioxidant_bd8fc427

Features Of Addivant WESTON TNPP Antioxidant

  1. High-performance secondary antioxidant based on tri(nonylphenyl) phosphite (TNPP) chemistry.

  2. Excellent hydrolytic stability and low volatility for extended processing window in high-temperature compounding.

  3. Effective peroxide decomposer that synergizes with primary antioxidants (e.g., hindered phenols) to enhance long-term thermal stability.

  4. Low color formation and minimal impact on polymer clarity—ideal for light-colored and transparent applications.

  5. Compatible with polyolefins, engineering thermoplastics, and elastomers including PP, HDPE, LDPE, and EPDM.

Typical Applications Of Addivant WESTON TNPP Antioxidant

  1. Polypropylene (PP) automotive interior parts requiring long-term heat resistance and low fogging.

  2. HDPE and LDPE blow-molded containers for food, pharmaceutical, and chemical packaging.

  3. Thermoplastic elastomer (TPE) compounds used in medical tubing and consumer goods.

  4. Masterbatch formulations where high additive loading and dispersion stability are critical.

  5. Recycled polyolefin streams needing robust stabilization against thermo-oxidative degradation.

Specifications Of Addivant WESTON TNPP Antioxidant

Chemical TypeTri(nonylphenyl) phosphite (TNPP)
Product FormPale yellow to amber liquid
AppearanceClear, homogeneous liquid at room temperature
Density (25°C)0.97–0.99 g/cm³
Phosphorus ContentApprox. 3.4–3.6 wt%
Acid Value (mg KOH/g)< 0.5
Flash Point (Cleveland Open Cup)> 200°C
Primary ApplicationsPolyolefins, engineering plastics, elastomers, masterbatches


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