Doverphos® 4-HR (TNPP) is a clear liquid made of trisnonylphenyl phosphite (TNPP) with pproximately 0.75% triisopropanolamine. Primarily used as a heat stabilizer, Doverphos® 4-HR (TNPP) is well suited for the production of polyolefin, acrylics, adhesives, elastomers, nylon, polycarbonate, polyurethanes, polystyrene, PVC, coatings, ABS, and polyethylene terephthalate.
Dover Chemical Corporation provides chemical specialty products, specifically chemical additives, to our customers around the world who make products that are useful in everyday life. Dover Chemical Corp.'s products help to improve a wide variety of materials, including polymers for use in industrial and household applications along with plasticizers or as an additive in paints, sealants, rubber, PVC, and PUF products. The company seeks to create sustainable growth and value through their commitment to the interests of Dover Chemical's stakeholders and compliance with the American Chemistry Council's Code of Responsible Care®.
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