Calcium Stearate CaSt₂ Calcium distearate CAS 1592-23-0

Tree Chem Calcium Stearate CAS 1592-23-0 is produced through a controlled process ensuring consistent quality, low moisture, and uniform particle size. It functions as a multifunctional additive widely used in polymer processing, providing lubrication, mold release, and anti-caking benefits. In coatings and rubber, it improves smoothness, reduces friction, and enhances product stability under thermal stress.

Tree Chem provides various grades of Calcium Stearate, allowing flexibility for manufacturers in plastic compounding, masterbatch, and surface treatment industries. For more information or technical data, please contact cohete@cntreechem.com.

Especificación

Información básica

Especificación técnica

Aplicaciones

Plastics Industry

• Calcium stearate plays a highly important role in the plastics industry and is an irreplaceable heat stabilizer in PVC systems. It can effectively absorb hydrogen chloride released during PVC degradation and replace active chlorine in polymer chains, thereby suppressing further thermal decomposition. This process greatly enhances thermal stability, color retention, and long-term durability of the final material. Calcium stearate not only delays polymer aging but also improves long-term performance, making it widely used in high-quality PVC pipes, profiles, and cable sheaths.
• In plastic processing, calcium stearate exhibits excellent lubricating and mold-release properties. It forms a stable lubricating film between polymers and processing equipment, reducing friction and shear heat accumulation while preventing melt degradation. It lowers melt viscosity, improves flowability, and enables smoother extrusion, calendaring, and injection molding, allowing easy mold release and smoother, glossier finished surfaces with improved production efficiency.
• Across different polymer systems, calcium stearate demonstrates strong versatility. In PVC processing, it serves as both internal and external lubricant; in polyethylene and polypropylene, it acts as a lubricant and dispersant, promoting uniform pigment and filler distribution; and in engineering plastics such as polycarbonate and nylon, it reduces melt viscosity, minimizes molding defects, and enhances both surface and mechanical quality.

Rubber Industry

• Calcium stearate is a key vulcanization activator and processing aid in rubber formulations. It reacts with zinc oxide to form active complexes that accelerate vulcanization, increase crosslink density, and enhance mechanical properties such as tensile strength, elasticity, and abrasion resistance. Rubber containing calcium stearate shows better heat resistance and anti-aging performance, making it widely applied in tires, seals, and heat-resistant rubber parts.
• During mixing, calcium stearate provides excellent internal lubrication and dispersion. It reduces mixing torque, minimizes equipment wear, and prevents scorching, while promoting uniform filler distribution such as carbon black and silica within the rubber matrix. This improves compound homogeneity and surface quality. In molding and extrusion, calcium stearate minimizes mold sticking and enhances release efficiency, producing smoother and more uniform surfaces.

Coatings Industry

• Calcium stearate is a multifunctional additive in the coatings industry, serving as a drier, matting agent, anti-settling agent, and rheology modifier. In alkyd, epoxy, and acrylic systems, it promotes oxidative polymerization, accelerates film drying, and shortens both surface and through-dry times. In water-based coatings, calcium stearate improves slip and smoothness, ensuring easier application and better film formation.
• As a matting agent, calcium stearate forms a fine microstructure that reduces surface reflectivity and provides a soft matte finish. It also offers excellent anti-settling and rheological control properties, preventing pigment sedimentation and improving storage stability. In powder coatings, calcium stearate acts as a flow modifier and anti-caking agent, improving powder flowability and electrostatic spray performance, resulting in smoother, more uniform coating surfaces.

Cosmetics Industry

• Calcium stearate plays a multifunctional role in cosmetics as an emulsifier, thickener, and texture enhancer. In creams and lotions, it enhances emulsion stability, prevents oil-water separation, and increases viscosity and softness. It forms a thin protective film on the skin, reducing moisture loss, improving hydration, and enhancing spreadability.
• In pressed powders and loose powders, calcium stearate improves adhesion and smoothness, creating a finer texture and more even finish. Its oil-absorbing property helps control sebum secretion and maintain a long-lasting matte appearance, making it ideal for oil-control and long-wear cosmetic products.

Pharmaceutical Industry

• Calcium stearate is a widely used pharmaceutical excipient with lubricating, mold-release, and thickening properties. In tablet and capsule manufacturing, it reduces friction between powders and tooling surfaces, prevents sticking, and improves tablet surface quality and production efficiency. It also enhances powder flowability, ensuring uniform drug content and accurate dosing.
• In ointments and suppositories, calcium stearate functions as a base modifier that improves viscosity, stability, and consistency. It forms a stable protective layer, enhances spreadability, and reduces moisture migration, which improves product stability and shelf life.

Emerging Applications

• Calcium stearate has also found limited but growing applications in emerging sectors, including rheological control in recycled plastics, anti-caking and dispersion regulation in powder coatings, interfacial lubrication in bio-based materials, and mold-release enhancement in 3D printing resin systems.

Almacenamiento y manipulación

• Store in a dry, ventilated area, away from moisture and strong acids.
• Avoid exposure to excessive heat or direct sunlight.
• Use clean and dry tools during handling to maintain product integrity.

Aviso de uso

• Avoid dust formation during transfer and mixing.
• Use appropriate PPE when handling powders.
• Ensure thorough dispersion in the formulation for best performance.
• PVC Stabilizer System: Calcium stearate 0.8%, zinc stearate 0.6%, epoxidized soybean oil 3%, tribasic lead sulfate 1%. Calcium stearate functions as an HCl absorber and active chlorine replacer, enhancing PVC thermal stability and processing flow.
• Rubber Vulcanization System: Zinc oxide 5 parts, calcium stearate 2 parts, accelerator CZ 0.6 part, sulfur 2 parts. Calcium stearate promotes the reaction between zinc oxide and accelerators, accelerating vulcanization and improving rubber mechanical strength.
• Powder Coating Formula: Polyester resin 60%, epoxy resin 30%, calcium stearate 0.8%, pigment 8%, leveling agent 0.2%. Calcium stearate improves powder flow and dispersion, prevents caking, and ensures uniform coating application.
• Solvent-Based Paint Formula: Alkyd resin 55%, solvent 30%, pigment 10%, calcium stearate 1%, drier 0.5%. Calcium stearate prevents pigment sedimentation, enhances leveling, and improves surface smoothness.
• Compact Powder Formula: Talc 70%, titanium dioxide 10%, mica 10%, calcium stearate 5%, fragrance and colorant 5%. Calcium stearate increases powder adhesion and spreadability, resulting in a smoother makeup finish.
• Lotion Formula: Water 60%, glycerin 10%, mineral oil 15%, emulsifying wax 10%, calcium stearate 2%, preservatives and fragrance 3%. Calcium stearate stabilizes the emulsion system and improves viscosity for a more uniform texture.
• Tablet Formula: Active ingredient 90%, starch 5%, calcium stearate 1%, talc 1%, lactose 3%. Calcium stearate serves as a lubricant, reducing friction during compression and preventing sticking.
• Ointment Base: Vaseline 60%, liquid paraffin 30%, calcium stearate 1%, emulsifier 5%, water 4%. Calcium stearate enhances consistency and stability, keeping the ointment smooth and homogeneous.
• Candy Formula: Sucrose 60%, glucose syrup 30%, calcium stearate 0.8%, flavor 0.5%, colorant 0.2%. Calcium stearate prevents caking, improves mold release, and enhances product appearance.

Embalaje

• 20 kg per bag
• 400 kg per jumbo bag
• Custom packaging available upon customer request