Doverphos HiPure 4HR Plus Trisnonylphenyl phosphite 26523-78-4 ICC Industries-Dover Antioxidants >> Phosphite Acrylics/ Acrylates Rubber - Elastomer (Chloroprene, Butyl …) PU - Prepolymers Polyvinyl Chloride (PVC) Polyolefins (PE, PP…) ADHESIVE Doverphos HiPure 4HR Plus offers the highest purity TNPP with the lowest level of free nonylphenol of any commercially available product. You get more active phosphite per pound with less free nonylphenol that could come off as a volatile during polymer processing. This patented process heat stabilizer is so cost effective that you can probably use a truckload less if you typically purchase one million pounds. Doverphos HiPure 4 has 0.1% residual nonylphenol (NP) maximum, compared to the 2.5% to 6.0% typically contained in competitive products. Doverphos HiPure 4 is an effective liquid phosphite heat stabilizer for a wide variety of polymer and rubber systems, including: Polyolefins Acrylics Polycarbonates Elastomers ABS Polyethylene Terephthalate Adhesives PVC Polyurethanes Gives better final color in end-use products and less free nonylphenol released during processing. Trisnonylphenyl phosphite. Used as antioxidant and heat stabilizer in adhesives. Gives better final color in end-use products and less free nonylphenol released during processing. Contains 1.O% triisopropanolamine for maximum hydrolytic stability. Use level: 0.05-3.0 %.