Coated Calcium Carbonate

Coated Calcium Carbonate: Specialized Applications and Performance Benefits

Introduction to Coated Calcium Carbonate

Coated calcium carbonate represents an advanced form of this versatile mineral filler, where the surface of calcium carbonate particles is chemically modified to enhance performance in specific applications. This surface treatment transforms the material’s interaction with polymers, solvents, and other components in composite materials.

Surface Coating Technologies

. Stearic Acid Coating

• • Most common coating method for calcium carbonate

• • Forms a monomolecular layer on particle surfaces

• • Typically uses 1-3% stearic acid by weight

• • Creates hydrophobic surface properties

• Improves compatibility with non-polar polymers

Performance Advantages of Coated Calcium Carbonate

1. Enhanced Dispersion Characteristics

• • Prevents particle agglomeration in polymer matrices

• • Reduces viscosity in molten polymers

• • Improves processing rheology

• • Enables higher filler loading without compromising processability

2. Improved Mechanical Properties

• • Better stress transfer at filler-matrix interface

• • Higher tensile and flexural strength

• • Improved impact resistance

• • Enhanced elongation at break

3. Superior Surface Quality

• • Reduces surface defects in final products

• • Improves gloss and smoothness

• • Minimizes plate-out during processing

• • Enhances paintability and printability

4. Optimized Thermal Properties

• • Better heat dissipation

• • Improved dimensional stability

• • Reduced coefficient of thermal expansion

• • Enhanced flame retardancy

Industrial Applications

1. Plastics Industry

• • PVC cables and profiles (up to 70% filler content)

• • Engineering plastics (PP, PE, ABS composites)

2. Rubber Products

• • High-performance tires

• • Footwear components

• • Seals and gaskets

3. Coatings and Paints

• • High-solid coatings

• • Automotive paints

• • Powder coatings

• • Industrial protective coatings

4. Specialty Applications

• • Masterbatch production

• • Adhesives and sealants

• • Printing inks
  •  Pharmaceutical excipients

Selection Guidelines

When choosing coated calcium carbonate, consider:

• • Processing Requirement
  • Matrix Material Compatibility

• • Final Product Specification
  • Cost-Performance Balance

Product	Median Particle size D50 (µm)	Top Cut D98 ( µm)	Particles under 2µm	Treated	Data Sheet
Mach 70	1.40	5.0	70%	ok	Mach 70
Mach 60	1.60	6.0	60%	ok	Mach 60
Mach 50	2.0	8.0	50%	ok	Mach 50
Mach 40	2.70	10	40%	ok	Mach 40
Mach 1	4.0	15	25%	ok	Mach 1
Mach 2	4.50	20	20%	ok	Mach 2
Mach 3	5.80	30	15%	ok	Mach 3
Mach 4	7.0	40	—	x	Mach 4