SI Group is the world’s largest producer of liquid phosphites, specialty antioxidants, and additives in nondust forms. Explore SI Group's extensive portfolio of antioxidants and specialty additives, including light stabilizers, polymer modifiers, polymerization inhibitors, and intermediates engineered to meet the performance and regulatory needs of modern markets. Antioxidants effectively mitigate oxidation, extending the service life of plastics, coatings, and adhesives. UV stabilizers and absorbers protect from the effect of ultraviolet radiation, preventing degradation and maintaining aesthetic and structural integrity. Polymer modifiers optimize incompatible polymer materials and fillers by enhancing adhesion, strength, flexibility, and processability.
Begin by selecting your desired functionality below to find the right solution for your resin and formulation.
ANOX™ 1315 is a low-viscosity, liquid phenolic antioxidant for use in a diverse range of applications, from polyurethanes to lubricants to plastic formulations.
ANOX™ 20 Granular is a high–molecular weight hindered primary phenolic antioxidant. It prevents polymer degradation during long-term aging in various polymer systems.
ANOX™ 20 Powder is a high molecular weight hindered phenolic primary antioxidant. Effective as a process stabilizer, but is especially powerful at preventing polymer degradation during long-term aging.
ANOX™ IC-14 is a low-volatility phenolic antioxidant with excellent resistance to extraction in polymers, and provides outstanding protection against high-temperature degradation.
ANOX™ PP18 NDB is a hindered phenolic antioxidant with high molecular weight supplied in a non-dusting form. It provides excellent protection against polymer degradation.
ANOX™ PP18 Powder is a high molecular weight hindered phenolic antioxidant that effectively protects against polymer degradation during processing and long-term aging.
ETHANOX™ 330 Granular antioxidant is a high–molecular weight phenolic additive for elastomers, PE wire insulation, hot-melt adhesives, tackifiers, and engineering polymer applications. This phenolic antioxidant is similar to ETHANOX™ 330 Powder; however, it’s offered in a granular form for easy handling.
ETHANOX™ 330 Powder is a high–molecular weight phenolic antioxidant ideal for a wide variety of applications, including elastomers, PE wire insulation, hot-melt adhesives, tackifiers, and engineering polymers. It is similar to ETHANOX™ 330 Granular but in a powder form.
LOWILITE™ 19 is a Hindered Amine UV and Light Stabilizer (HALS) that protects organic polymers from ultraviolet caused degradation. LOWILITE™ 19 is excellent for use in thick and thin section fiber in PE, PP, and blended applications.
LOWILITE™ 28 benzotriazole-type UV light absorber provides strong protection from degradation for a variety of polymers when exposed to UV in the range of 290–400 nm.
LOWILITE™62 UV stabilizer has a low melting point and exhibits low interaction with co-additives, such as pigments. This HALS additive protects organic polymers from degradation caused by exposure to ultraviolet radiation.
LOWILITE™ 77 is a highly effective light stabilizer suitable for use alone or in combination with oligomeric HALS for thick parts, such as car bumpers.
LOWILITE™ 94 is an oligomeric hindered amine light stabilizer (HALS) with extremely low volatility, high thermal stability, and excellent compatibility with a wide variety of materials.
LOWILITE™ UV B1260 is a highly effective liquid blend of a phenolic antioxidant and light stabilizers for protecting polymers from exterior weathering.
LOWINOX™ AH24 is a sterically hindered phenolic antioxidant designed for use in unvulcanized rubber, giving excellent protection from oxygen and UV exposure.
LOWINOX™ HD98 is a hindered phenolic antioxidant that provides excellent color protection during polymerizing and manufacturing polyamide fibers, molded articles, and films.
LOWINOX™ MD24 combines an antioxidant and a metal deactivator for outstanding protection in a variety of polymers, including polyolefins and elastomers.
LOWINOX™ TBM-6 is a versatile Phenolic antioxidant stabilizer that is especially well suited for wire and cable applications, providing thermal stability during processing and end-use.
Low volatility, thioester antioxidant provides excellent long-term heat stabilization as well as low odor and plate-out. It is ideal for polyolefin and engineered thermoplastic systems.
NAUGARD™ 445 Granular is an excellent-performance amine antioxidant with significant synergy with phenolics, particularly effective in extreme heat and oxygen environments.
NAUGARD™ 445 Powder is an amine antioxidant with excellent synergy with phenolic antioxidants and excellent for use in extreme heat and oxygen environments.
NAUGARD™ Super Q is an amine antioxidant that imparts both processing and long-term heat stability in carbon black–filled polymers. It is a higher-purity version of NAUGARD™ Q.
NAUGARD™ XL-1 is a dual-function antioxidant and metal deactivator designed for use in polyolefins and polystyrenics with residual metallic ions due to mineral fillers, inorganic pigments, or catalysts.
POLYBOND™ 3002 is a low-functionality and high-viscosity maleic anhydride–modified polypropylene coupling agent ideal for use with processing equipment that does not have a low-feed-rate capability.
POLYBOND™ 3150 is a polypropylene-based coupling agent with moderate maleic anhydride content. It provides improved strength and enhanced physical properties. It can be used with processing equipment lacking low-feed-rate capabilities.
POLYBOND™ 3200 is a workhorse coupling agent for filled polypropylene and polyamide–polypropylene blends. It can be used with glass-, mineral-, or cellulose-fiber-reinforcing materials.
POLYBOND™ 3349 is a coupling agent and compatibilizer for linear low-density polyethylene and polyamide blends. It is excellent for use in composites with high levels of glass or mineral fillers.
POLYBOND™ 7200 acts as a high-efficiency coupling agent for cellulose fiber-filled polypropylene by reducing water uptake and providing higher flexural/tensile strength and impact properties than convential coupling agents.
ROYALTUF™ 498 a maleic anhydride grafted EPDM used for increasing low-temperature impact resistance of polyamides. It is ideal for recycled polyamide compounds.
ROYALTUF™ 527 is a maleic anhydride–grafted EPDM impact modifier that is especially useful for improving low-temperature performance in both virgin and recycled polyamides.
ULTRANOX™ 626 is a high performance solid phosphite antioxidant that improves color stability and reduces polymer degradation during compounding, fabrication, and end use in a variety of resins.
ULTRANOX™ 626A is a high performance solid phosphite antioxidant that improves color stability and reduces polymer degradation during compounding, fabrication, and end use in a variety of resins. Similar to ULTRANOX® 626 but in a granular form.
ULTRANOX™ 627AV is a high performance solid phosphite antioxidant that improves color stability and reduces polymer degradation during compounding, fabrication, and end use in a variety of resins. Similar to ULTRANOX™ 626 but in a free-flowing form with an inorganic neutralizer for improved handling characteristics.
Versatile phosphite stabilizer that improves color, processing stability, and end-use of a variety of polymers; similar to WESTON™ 398 but with food contact approvals.
WESTON™ DPDP is an alkyl-aryl phosphite ester antioxidant that provides color and processing stability in polymers that do not require food contact approvals.
WESTON™ is an alkyl-aryl phosphite ester antioxidant that provides color and processing stability in polymers that do not require food contact approvals. It is similar to WESTON™ DPDP but with a higher molecular weight and lower phosphorus content.
WESTON™ TLP is a trialkyl phosphite ester antioxidant that functions as a sulfur deactivator and improves antifriction and antiwear characteristics in lubricants.
WESTON™ TNPP is a versatile phosphite stabilizer that improves color, processing stability, and the end use of a variety of polymers; similar to WESTON® 399, but with a higher flash point.
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