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Coated Calcium Carbonate
Coated Calcium Carbonate is a fine, white, odorless powder consisting of naturally occurring ground calcium carbonate (CaCO₃) treated with a surface coating—typically stearic acid or other fatty acids—to enhance compatibility with non-polar matrices. This coating improves dispersion in plastic and rubber formulations, reduces moisture pickup, and enhances the physical properties of the final product. Compared to uncoated grades, coated calcium carbonate offers better hydrophobicity, improved flow properties, and stronger interfacial bonding in polymeric systems. It is widely used in plastics, rubber, paints, sealants, adhesives, paper, and more.
Coated Calcium Carbonate
Primary Uses
- Plastics Industry
- Used as a functional filler in polypropylene (PP), polyethylene (PE), PVC, and thermoplastics.
- Improves dimensional stability, rigidity, and impact strength.
- Enhances dispersion and reduces compound viscosity.
- The stearic acid coating increases compatibility with polyolefins and reduces water absorption.
- Reduces material cost while maintaining mechanical performance.
- Rubber Industry
- Acts as a reinforcing agent and processing aid in natural and synthetic rubber.
- Improves tensile strength, elasticity, and abrasion resistance.
- Enhances surface finish and reduces curing time.
- Prevents moisture absorption, improving product shelf-life and consistency.
- Paints & Coatings
- Used as an extender pigment in architectural and industrial paints.
- Provides matting, opacity, and rheological control.
- Reduces oil absorption and improves weather resistance in exterior coatings.
- In powder coatings, it helps improve flow properties and electrostatic spray behavior.
- Adhesives & Sealants
- Used to modify rheology and reduce cost.
- Improves consistency, thixotropy, and bonding strength.
- Prevents cracking and enhances thermal resistance.
Secondary Uses
- Cable & Wire Compounding
- Filler in sheathing and insulation materials.
- Enhances dielectric strength, flame resistance, and processability.
- Coated version provides better moisture resistance.
- Paper Industry (Limited Use)
- Used in specialty papers requiring enhanced smoothness and printability.
- Coated calcium carbonate can be employed where improved water resistance is needed.
- Masterbatch & Compounding
- Used in color and additive masterbatches to ensure uniform dispersion of pigments and fillers.
- Aids in maintaining pellet strength and batch consistency.
- Construction Materials
- Incorporated into dry mix mortars and sealants to enhance flowability and durability.
- Contributes to crack resistance and improved surface smoothness.
- Inks
- Used in some ink systems for its opacity and matting properties while maintaining low viscosity.
1. Basic Identification Attributes
- Chemical Name (IUPAC): Calcium Carbonate
- Common/Trade Name: Coated Calcium Carbonate
- CAS Number: 471-34-1
- HS Code: 2836.50.00
- Molecular Formula: CaCO₃
- Synonyms:
- Surface-treated calcium carbonate
- Stearic acid coated CaCO₃
- Modified calcium carbonate
2. Physical & Chemical Properties
- Physical State: Fine powder
- Color & Odor: White; odorless
- Particle Size (D50): Typically 1–5 microns (varies by grade)
- Surface Treatment: Stearic acid (typically 1–2% by weight)
- Density: ~2.7 g/cm³
- Oil Absorption: Lower than uncoated grades
- Moisture Content: <0.5%
- pH (10% slurry): 8.5–9.5
- Solubility: Insoluble in water; reacts with acids to release CO₂
- Stability: Chemically stable under normal conditions
3. Safety & Hazard Attributes
- Hazard Class (GHS): Not classified as hazardous
- NFPA Ratings:
- Health: 1
- Flammability: 1
- Reactivity: 0
- Exposure Limits:
- OSHA PEL: 15 mg/m³ (total dust)
- ACGIH TLV: 10 mg/m³
- Toxicity: Non-toxic; may cause mild irritation if inhaled as dust
- Reactivity: Inert; reacts with strong acids to release carbon dioxide
4. Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry place away from moisture
- Container Type: Multi-layer paper or HDPE bags, or bulk containers
- Shelf Life: Indefinite if stored properly
- Special Handling:
- Use dust extraction during bulk handling
- Avoid breathing dust
- Store away from acids
5. Regulatory & Compliance Attributes
- FDA Status: Indirect food additive (restricted uses)
- REACH Status: Registered
- RoHS/ELV: Compliant
- Transportation: Not regulated as hazardous material
- Waste Disposal: Dispose according to local regulations; environmentally safe
6. Environmental & Health Impact
- Ecotoxicity: Non-toxic to aquatic and terrestrial life
- Persistence: Stable and non-reactive in the environment
- Bioaccumulation: Does not bioaccumulate
- Carcinogenicity/Mutagenicity: Not classified as carcinogenic
- Biodegradability: Not biodegradable but environmentally inert
Safety Handling Precautions
PPE Requirements:
- Dust mask or respirator
- Safety goggles
- Gloves and protective clothing if prolonged exposure
Handling Measures:
- Avoid creating dust clouds
- Use adequate ventilation
- Avoid contact with eyes and prolonged inhalation of dust
Storage Guidelines:
- Keep containers tightly sealed
- Store away from moisture and strong acids
- Use first-in, first-out inventory rotation
Hygiene Practices:
- Wash hands after handling
- Avoid eating, drinking, or smoking in handling areas
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if symptoms persist
- Skin Contact: Wash with soap and water
- Eye Contact: Rinse immediately with water for 15 minutes; seek medical advice if irritation continues
- Ingestion: Rinse mouth; not considered toxic, but seek medical advice for large amounts
Firefighting Measures
- Fire Hazards: Non-flammable
- Extinguishing Media: Use media suitable for surrounding fire
- Special Precautions: Avoid dust accumulation in fire-prone areas
- Decomposition Products: None under normal fire conditions
Related products
Aluminum Fine Powder
Aluminum fine powder consists of finely divided aluminum particles, typically metallic and silvery-white in appearance. It is produced by atomization or grinding of bulk aluminum and is valued for its high surface area, excellent conductivity, and lightweight metallic properties. Aluminum fine powder is extensively used in various industrial applications including metallurgy, pyrotechnics, coatings, additive manufacturing, and as a pigment. Due to its reactivity, it requires careful handling and storage. Its fine particulate nature makes it particularly useful where rapid oxidation or reaction is desired, such as in explosives or energetic materials. It is also employed in the manufacturing of paints, inks, and cosmetics to impart metallic luster.
Aluminum hydroxide
Aluminum Hydroxide, chemically known as Al(OH)₃, is a white, odorless, and odorless powder or gelatinous substance. It is widely used in pharmaceuticals as an antacid to neutralize stomach acid and relieve indigestion and heartburn. Beyond healthcare, aluminum hydroxide is a crucial component in water purification, fire retardants, and as a precursor or filler in various industrial applications. It functions as a flame retardant by releasing water upon heating, thus cooling the material and diluting flammable gases. Due to its amphoteric nature, it can react both as an acid and base, enhancing its versatility. Aluminum hydroxide is often utilized in manufacturing aluminum salts and in producing aluminum oxide.
Calcium Carbonate Filler
Calcium Carbonate Filler is a high-quality, uncoated ground calcium carbonate (GCC) specially engineered for use as a filler in polyethylene (PE) and other polyolefin resins. This grade of calcium carbonate is designed to enhance the physical and mechanical properties of plastics while providing cost-effective bulk and improved processing. It is a fine, white, odorless powder with excellent brightness, high purity, and uniform particle size distribution. Its use improves stiffness, impact resistance, dimensional stability, and surface finish in polyethylene applications such as films, sheets, pipes, and molded parts.
Calcium Carbonate Light
Calcium Carbonate Light is a finely ground, low bulk density natural mineral composed primarily of calcium carbonate (CaCO₃). Compared to standard grades, it has a lower density and larger particle size distribution, making it suitable for applications where light weight and high brightness are important. This form is extensively used as a filler and extender in industries such as plastics, paints, rubber, paper, adhesives, and construction materials to improve opacity, brightness, and texture, while maintaining low weight and cost efficiency. Its chemical inertness and whiteness provide functional and aesthetic advantages across formulations.
Calcium Carbonate Uncoated
Calcium Carbonate Uncoated is a naturally occurring mineral compound composed primarily of calcium, carbon, and oxygen with the chemical formula CaCO₃. It appears as a fine white powder or granules, widely used as a filler, pigment, and functional additive across various industries. The uncoated form means the calcium carbonate particles are not surface-treated, retaining their natural properties. It is valued for its high brightness, whiteness, and excellent compressibility. Uncoated calcium carbonate is used to enhance opacity, improve processing, and reduce costs in plastics, paints, coatings, adhesives, rubber, paper, and construction materials.
Cellulose Ether
Cellulose ether refers to a group of chemically modified cellulose derivatives where hydroxyl groups on the cellulose backbone are substituted with ether groups such as methyl, hydroxyethyl, or carboxymethyl groups. These modifications improve solubility, viscosity, and film-forming properties while maintaining biodegradability and non-toxicity. Cellulose ethers are white to off-white powders or granules that dissolve in water to form viscous, stable solutions. They are widely used as thickeners, binders, stabilizers, and film formers in industries such as construction, pharmaceuticals, cosmetics, food, and paper.
Filler WTD
Filler WTD is a versatile, finely processed powdered filler primarily used in a wide range of industrial applications including paints, coatings, plastics, adhesives, sealants, rubber compounds, and construction materials. It is engineered to improve product performance by enhancing mechanical properties, increasing volume, reducing cost, and improving processing characteristics. Filler WTD typically exhibits excellent dispersibility, consistent particle size distribution, and good compatibility with various resin systems and binders. Its primary role is to act as an inert extender or reinforcing agent, providing bulk and stability while maintaining or enhancing the physical and chemical properties of the final formulation.
Talcum Powder (Talc)
Talcum Powder is a naturally occurring mineral composed primarily of hydrated magnesium silicate. It is known for its softness, absorbency, and lubricating properties. Talc is widely used in cosmetic, pharmaceutical, industrial, and consumer products due to its ability to absorb moisture, improve texture, and provide a smooth, silky feel. The powder form allows easy dispersion and application across diverse sectors.
