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Emulsified Wax

Updated: 2026-07-20

Overview

Emulsified wax is a colloidal system where microscopic wax particles are uniformly dispersed in water using emulsifiers. It combines the hydrophobic properties of wax with the ease of application of water-based systems. Commonly used waxes include paraffin, polyethylene, and carnauba. The emulsion is stabilized by surfactants, typically non-ionic or anionic, to prevent separation. First developed in the mid-20th century, emulsified wax solved challenges in industries requiring thin, even wax layers without organic solvents. Its eco-friendly profile has driven adoption in place of solvent-based waxes, aligning with modern environmental regulations.

Physical and Chemical Properties

Emulsified wax exhibits low viscosity (50-500 cP) and neutral to slightly alkaline pH (7-9). The particle size ranges from 0.1-5 microns, affecting gloss and penetration. It has excellent thermal stability up to 50°C but may separate above 60°C. Unlike solid wax, it shows Newtonian flow behavior. Key chemical resistance includes tolerance to weak acids and alkalis but susceptibility to strong ionic solutions that break the emulsion. Electrical conductivity is higher than pure wax due to water content. The emulsion can be diluted with water but destabilizes upon freezing or prolonged high-shear mixing.

Main Applications

In coatings, emulsified wax acts as a matting agent, scratch-resistant additive, and moisture barrier. Textile industries use it for fiber lubrication and waterproofing, particularly in canvas and technical fabrics. Paper coating applications improve surface smoothness and printability. The cosmetic sector employs carnauba-based emulsions in hair care and creams for emollient properties. Industrial polishes for floors and automobiles rely on its easy spreadability. Emerging uses include 3D printing support materials and biodegradable packaging coatings, capitalizing on its renewable sourcing potential.

Safety and Storage

Classified as non-hazardous under GHS, emulsified wax requires no special transport permits. Skin contact may cause mild irritation; PPE like gloves is recommended for prolonged handling. Spills create slippery surfaces but are easily cleaned with water. Storage tanks should be epoxy-lined or stainless steel to prevent corrosion. Shelf life is typically 6-12 months; microbial growth is prevented by biocides in humid climates. Freezing causes irreversible wax separation, while temperatures above 40°C accelerate sedimentation. Always stir before use if stored long-term.

B2B Procurement Guide

Specify wax type (paraffin, beeswax, synthetic), melting point, and solid content (usually 35-50%). Particle size affects performance: <1 micron for transparent coatings, 1-3 microns for opacity. Request technical data sheets for emulsion stability (ASTM D3707) and freeze-thaw resistance. Bulk shipments (IBC totes or tankers) reduce costs for volumes >1 ton. Verify supplier QC measures like zeta potential testing. For international procurement, consider preservative requirements (e.g., CIT/MIT-free for EU). Sample testing should include application-specific evaluations like rub resistance for coatings or wash durability for textiles.

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