SI Group Products


SI Group is the world’s largest producer of liquid phosphites, specialty antioxidants and additives in non-dust forms, including its patented ANOX™ NDB™ stabilizer blend technology that enables up to eight components to be delivered in a single homogeneous blend. Recognized for its extensive portfolio of specialty additives, including light stabilizers, polymer modifiers, polymerization inhibitors and intermediates, SI Group is the former antioxidant and UV stabilizer solutions business of Chemtura Corporation (later known as Addivant). The company's global headquarters is in Schenectady, NY USA, with regional offices in Al Jubail, Saudi Arabia; Basel, Switzerland and Shanghai, China. It has over 30 manufacturing plants on five continents, as well as research and sales facilities around the globe.

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SI Group Articles
Antioxidant and UV Stabilizers for Coatings and Adhesives thumbnail

SI Group™ carries a full portfolio of IRGANOX®, TINUVIN®, and Uvinul® drop-in equivalent antioxidants and UV stabilizers for the coatings and adhesive industries.

SI Group | Polyurethane Additives thumbnail

The SI Group is a leader and innovator in polymer additives and stabilizers that support a wide range of industries and markets.

How Plastics Can Fuel the Demand for Electric Vehicles thumbnail

The plastic and elastomer industry is fueling the way towards a completely electric automotive market. 

WESTON™ 705 for Sustainable Packaging thumbnail

WESTON™ 705 is the new generation of nonylphenol-free liquid phosphite antioxidants that can help contribute to a circular economy around food packaging.

Polymer Stabilization for Electric Vehicles thumbnail

With their recent expansion into phenolic antioxidants for plastics, the SI Group continues to develop innovate solutions for the automotive electric vehicle market.