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St. Louis Group (SLG) and Zeller Polymer Solutions, an affiliate of St. Louis Group, have the same overarching commitment to excellence and innovation while bringing a wealth of expertise to the chemical additives industry.Founded in 2010, St. Louis Group has since grown into a leading supplier of Flame Retardants (FRs) and Smoke Suppressants with a diverse portfolio. SLG’s alliances with a global network of suppliers, in combination with our domestic manufacturing operations, allow us to offer halogenated and non-halogenated solutions to our customers. Due to our broad product lines and knowledge of additive, reactive, intumescent, and low smoke mechanisms, SLG is able to also provide tailor made low viscosity solutions to meet the most stringent flammability and smoke requirements. Our industry experience, reliable supply channels, cutting-edge technologies, custom offerings, and unsurpassed commitment to customer service make SLG your preferred choice in the industry.Zeller Polymer Solutions specializes in Antioxidant and UV Light Stabilizer solutions. Our team of experts are equipped with decades of experience in the chemical additives industry with the primary goal to exceed the expectations of our customers, both present and future. At Zeller, we understand the importance of efficient logistics and prompt delivery. With our robust global logistics capabilities and our strategically located warehouses, we ensure that our products reach customers around the world in a timely manner. We pride ourselves on delivering products of the utmost quality while still constantly driving innovation to provide you with the latest solutions and technologies. Zeller’s unwavering commitment to unparalleled customer service ensures that your needs are always our top priority. With our extensive global capabilities, we not only guarantee high-quality products but also strive to offer them at competitive prices, resulting in cost savings for our customer.Together, St. Louis Group and Zeller Polymer Solutions are at the forefront of the chemical additives industry, delivering excellence, innovation, and customer-focused solutions on a global scale.

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BroShield® 21-B is a high purity, non-diphenyl oxide, brominated flame retardant with excellent thermal stability.

BroShield® 21-B

BroShield® RB-11 is an efficient flame retardant for achieving the ASTM E-84 flammability test. The high halogen content & low viscosity make it a suitable choice over diols.

BroShield® RB-11

PhosGard® 140 is a low viscosity tris (2-butoxyethyl) phosphate that acts as an effective leveling agent and defoamer.

PhosGard® 140

PhosGard® NH4 is a halogen free phosphate flame retardant/plasticizer that demonstrates very low scorch & volatility.

PhosGard® NH4

SmokeShield® ZB4 is a fine particle sized zinc borate smoke suppressant. It also acts as a flame retardant synergist and a partial replacement of antimony oxide.

SmokeShield® ZB4

SmokeShield® ZM-2 is a high performance, non-molybdenum, low cost AOM replacement smoke suppressant with excellent thermal stability.

SmokeShield® ZM-2

Z-LITE® 94 is an effective hindered amine light stabilizer used in polyolefin and other polymers.

Z-LITE® 94

Z-NOX® 1076 is a hindered phenolic antioxidant that is suitable for thermoplastics and synthetic fibers.

Z-NOX® 1076

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St. Louis Group is an established &amp; viable supplier of brominated flame retardants. We are a domestic manufacturer of brominated polyols and blends. We also have contract manufacturing operations in China. Specialty dispersions and masterbatches are available upon request.

BroShield

St. Louis Group is one of the largest volume suppliers of antimony trioxide (ATO) in the US market. We are vertically integrated with mining and production operations in Bolivia and have contract manufacturing operations in China. Specialty dispersions and masterbatches are available upon request.

FireGard

Our FireBlend® line offers alternatives to antimony trioxide. We produce these proprietary products domestically and tailor them to flame retardant requirements.

FireBlend

St. Louis Group offers a wide range of highly effective liquid &amp; powder phosphorus based flame retardants. Specialty dispersions, blends, and masterbatches are available upon request.

PhosGard

St. Louis Group manufactures and distributes a comprehensive line of smoke suppressants that include traditional smoke suppressants, as well as low cost AOM alternatives and high-performance proprietary blends.

SmokeShield

Z-NOX

St. Louis Group offers a variety of magnesium hydroxide halogen free flame retardants.

MagFlam

CharFlam brand offers non-halogenated products that promote char formation in intumescent flame retardant applications &amp; engineering resins.

CharFlam

APYRAL

St. Louis Group Antimony Metal is a versatile ingot form of antimony, serving a range of vital roles. This metal finds its significance in applications such as batteries manufacturing and soldering flux, contributing to the creation of cables and supporting electrical and electronics markets. As an essential component in technical salts and inorganics, it embodies the prowess of antimony compounds. Antimony Metal is available in 4 grades: G1,G2,G3,G4.


St. Louis Group Antimony Metal

BroShield® 52B is a high-performance polymer additive tailored for enhancing flame retardancy in various plastics and elastomers. With a chemical composition based on Phenoxy Terminated Oligomer of TBBPA, this white powder additive offers excellent thermal and electrical properties. It's compatible with ABS, PBT, PC, PET, polysulfone, SAN, PC/ABS alloy, and PBT/PET alloy, ensuring versatile application possibilities. The product's good thermal and UV stability make it a reliable choice for materials requiring enhanced durability. Packaged in bags, BroShield® 52B conforms to regulatory standards, including TSCA (USA).

BroShield® 52-B

BroShield® 25B is a potent flame retardant for industrial applications. This powder, characterized by its white color, belongs to the brominated compounds family. Its chemical composition, Bis[3,5-dibromo-4-(2,3-dibromopropoxy)phenyl] sulphone, offers excellent thermal stability, ensuring reliable performance. BroShield® 25B is compliant with TSCA (USA) regulations and is conveniently packaged in bags. This solution excels in providing effective flame resistance and is a valuable addition to industrial additive portfolios.

BroShield® 25-B

SmokeShield® ZB4-XFA is a multifunctional additive designed to enhance the fire retardant properties of both plastics and elastomers. This product acts as a flame retardant, a smoke suppressant, and a synergist. Its compatibility with PVC makes it suitable for various applications. The white powder form ensures easy incorporation, and it functions as a char former, contributing to fire safety.

SmokeShield® ZB4-XFA

FireGard® Wetted ATO is a powerful flame retardant additive that combines Antimony Trioxide with 2% DIDP. This liquid-form industrial additive, designed to enhance fire resistance, serves as an effective flame retardant. Its applications include chemicals production, making it an essential choice for fire safety enhancement. FireGard® Wetted ATO is part of the industrial additives category and is available in convenient drum packaging. It is particularly suitable for various processes within chemicals production, offering advanced fire protection.


FireGard® Wetted ATO

Z-NOX® B900 represents an antioxidant blend composed of Z-NOX® 168 and Z-NOX® 1076, specifically developed for PE and PP films. With a white powder appearance, this blend is proficient in stabilizing heat degradation and oxidative degradation during processing and end applications. It can be used in conjunction with light stabilizers like Z-LITE® 22 or Z-LITE® 29.

Z-NOX® B900

Z-NOX® 1076 is an antioxidant mainly utilized in the electrical and electronics market segment, particularly for wire and cable applications like jacketing and insulation. It falls under both polymer additives and elastomer additives categories, functioning as an antioxidant. This product is compatible with various polymers and resins including acrylics, ABS, polycarbonates, polyethylenes, polyoxymethylene, polypropylenes, polyurethanes, PVC, and polystyrenes.

PhosGard® APP-MC emerges as a melamine-coated, fine particle crystal phase II modified Ammonium Polyphosphate, seen in its fine white powder form. Its role aligns with that of an effective non-halogenated flame retardant suitable for water-based coatings, polyurethanes, thermosets, and polyolefins.

PhosGard® APP-MC

Z-NOX® 3114 is an antioxidant formulated for plastics &amp; elastomers applications. Belonging to the chemical family of phenols, this product serves as a protective agent against oxidation processes. Compatible with polymers and resins such as acrylonitrile butadiene styrene (ABS), polycarbonates (PC), polyethylenes (PE), and polypropylenes (PP), Z-NOX® 3114 offers the benefit of low color formation and low gas fade. This essential additive enhances material quality by preventing degradation and maintaining the appearance and properties of plastics and elastomers in various technological uses.

Z-NOX® 3114

St. Louis Group

St. Louis Group (SLG) and Zeller Polymer Solutions, an affiliate of St. Louis Group, have the same overarching commitment to excellence and innovation while bringing a wealth of expertise to the chemi

St Louis Group - Flame Retardants - Smoke Suppressants - Knowde

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PhosGard® 148 is a clear and transparent liquid that stands as a robust solution in the realm of flame retardants for PVC. This exceptional product brings forth a range of advantages:


Effective in flexible PVC and vinyl plastisols, offering remarkable low-temperature flexibility and minimal volatility.
Demonstrates effectiveness in adhesive PVC, showcasing exceptional flame spread and smoke generation properties in vinyl resins.
Embodies excellence as a low volatile liquid flame retardant, designed to enhance the fire safety profile of PVC materials.


Experience the power of PhosGard® 148, a reliable choice for enhancing flame resistance in PVC applications.


PhosGard® 148

PhosGard® 1250 is an effective flame retardant solution enriched with Diethyl bis(2-hydroxyethyl)aminomethylphosphonate, a member of the Phosphonates chemical family. This halogen-free additive is designed for industrial applications, particularly as a flame retardant. Enhance the safety of your processes with PhosGard® 1250, a valuable addition to our range of processing additives.

PhosGard® 1250

PhosGard® 600 is a high-purity phosphorus/nitrogen intumescent flame retardant system, featuring low water solubility and good thermal stability. PhosGard® 600 has a white powder appearance, which signifies its role as an effective non-halogenated flame retardant suitable for engineering resins, thermosets, adhesives, and coatings.

PhosGard® 600

PhosGard® APP-BG presents a high phosphorus content, showcased in its fine white powder form. This non-halogen flame retardant, PhosGard® APP-BG functions effectively either alone or in conjunction with other flame retardants or synergists, with primary applications in intumescent coatings and systems.

PhosGard® APP-BG

PhosGard® RDP is a halogen-free phosphate ester flame retardant, appearing as a transparent to pale-yellow liquid. PhosGard® RDP offers low volatility and high heat stability, making it an ideal choice for flame retardancy in engineering resins, especially in foam applications.

PhosGard® RDP

PhosGard® 200 is a product that presents itself as a halogen-free phosphate ester flame retardant, noticeable by its white powder appearance. Notable for its good hydrolytic stability and high heat resistance, it proves effective in PC, PC/ABS, PPO/HIPS, and ABS applications.

PhosGard® 200

PhosGard® 675 shares similarities with PhosGard® 670 as a high-purity reactive non-halogen flame retardant, appearing as a transparent amber liquid. Its purpose aligns with that of PhosGard® 670, which is used as a non-halogen-reactive flame retardant for polyurethane foams and polyurethane coatings. The product offers excellent hydrolytic stability and high flame retardancy efficiency.

PhosGard® 675

PhosGard® 150 takes the form of a halogen-free phosphate-based flame retardant, characterized by its transparent liquid form. With a notably high phosphorus content, it's especially recommended for use in thermosets, particularly unsaturated polyester. It also finds utility in rigid polyurethane foams.

PhosGard® 150

PhosGard® 155 is a halogen-free phosphate-based flame retardant presented in transparent liquid form with similar attributes to PhosGard® 150. Notably, PhosGard® 155 boasts a significantly high phosphorus content, making it an ideal choice for thermosets, particularly in unsaturated polyester applications. Additionally, this product proves suitable for various uses, including rigid polyurethane foams, coatings, adhesives, sealants, and elastomers.

PhosGard® 155

PhosGard® 148 is a clear and transparent liquid that stands as a robust solution in the realm of flame retardants for PVC. This exceptional product brings forth a range of advantages:


Effective in f

PhosGard® 148 - St. Louis Group - Knowde

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