Montan wax

Montan wax (CAS 8002-53-7), also known as lignite wax, is a hard, high-melting mineral wax extracted from lignite coal.

Where is Montan wax used?

• Coatings, plastics processing and industrial formulations: lubricant and release agent
• Plastics compounding: internal and external lubricant during PVC and engineering thermoplastic processing
• Extruded profiles: reduces die buildup and improves surface finish
• Floor polishes, car care products and industrial coatings: builds slip resistance
• Adhesives and sealants: controls rheology and prevents blocking in hot-melt systems
• Metalworking: component in drawing compounds and stamping lubricants where high-temperature performance is required
• Plastic formulations: helps disperse pigments for consistent and stable colours.
• PVC production: bleached Montan Wax 'OP' acts as an effective lubricant and mixes well with waxes, resins and polymers.
• Industrial paints and polishes: functions as a matting and surface-modifying agent, contributing hardness, scratch resistance and a matte appearance.
• Coatings industry: used as a dispersing agent.

Good to know: OP wax is a refined, partially saponified derivative that buyers frequently specify as a distinct commercial grade.

Formulation notes

• Good solubility in aromatic solvents; carnauba wax has limited solubility in hydrocarbons.

Typical specification

• Available in crude and refined grades.
• Bleached Montan Wax 'S' (PHC 0051) is a very pale, hard wax with excellent glossing characteristics, high acid number, and crystalline structure.
• Melts at about 80 to 90 degrees Celsius.
• Can be emulsified by adding an alkali.
• Possesses higher polarity compared to paraffin waxes.

Regulatory status

• CLP-labelled in the EU.

Storage, packaging and handling

• Commonly sold in 25 kilo bags.

Frequently asked questions about Montan wax

How does montan wax behave in PVC and engineering thermoplastics during extrusion and injection molding?

It acts as an internal/external lubricant, reducing mold buildup and improving surface quality.

What forms is montan wax supplied in?

It is supplied in granular and flake form.

What role does montan wax play in automotive underbody coatings?

It is used to repel water and resist corrosion.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.