Overview
Waterborne polyamide wax dispersion is a colloidal system where micronized polyamide wax particles are uniformly distributed in water with the aid of surfactants. Developed as an environmentally friendly alternative to solvent-based wax additives, it combines the hardness and durability of polyamide with the easy handling of waterborne systems. The technology emerged in the 2000s to meet VOC reduction requirements in industrial coatings. Unlike traditional wax additives, it eliminates solvent emissions while maintaining comparable performance in surface modification and protection.
Physical and Chemical Properties
The dispersion typically contains 20-30% solid content with particle sizes ranging from 1-10 microns. Its viscosity ranges from 500-2000 mPa·s at 25°C, depending on the formulation. The pH is alkaline (8-10) to ensure dispersion stability. Key performance parameters include its softening point (135-145°C) and acid value (<5 mg KOH/g). The wax particles reorganize during film formation, creating micro-roughness that delivers matting effects (60-85° gloss at 60°) without compromising film integrity.
Main Applications
In wood coatings, it provides simultaneous matting and scratch resistance, allowing up to 30% reduction in other matting agents. Automotive OEM coatings utilize its anti-settling properties and thermal stability (up to 200°C) for clearcoat formulations. Printing inks benefit from its slip properties (coefficient of friction reduction by 40-60%) and anti-blocking effects. Emerging applications include 3D printing supports and textile coatings where its low-temperature flexibility proves advantageous.
Safety and Storage
Classified as non-hazardous under GHS, though prolonged skin contact should be avoided. Storage tanks should incorporate slow-speed agitators (30-60 rpm) to prevent sedimentation without causing foam. Shelf life is typically 12 months when stored properly. Freeze-thaw stability varies by formulation; premium grades withstand 3-5 freeze-thaw cycles. For large-volume storage, nitrogen blanketing is recommended to prevent microbial growth and oxidation at the liquid-air interface.
B2B Procurement Guide
Industrial buyers should specify required performance parameters: matting efficiency (gloss reduction per % addition), recoatability, and compatibility with specific resin systems. Bulk shipments (IBC totes or tank trucks) offer 15-25% cost savings versus drum quantities. Technical audits should verify manufacturing consistency through particle size distribution (laser diffraction) and stability testing (centrifugation at 3000 rpm for 30 min). Leading producers include BYK, Elementis, and specialty chemical manufacturers in Germany and Japan.
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