Discover our main brands websites

Arkema worldwide

en
top

New advanced architectural paints, wood coatings, and more generally industrial coatings (for home appliance, for instance) are designed to withstand the intensive use and high-volume traffic of commercial, institutional, and residential buildings. Formulators need to create a wide variety of glossy to matte, smooth to textured finishes with excellent durability, suitable for use in a variety of environments.

Burnish resistance is a key property for matte and semi-gloss coatings. Conventional matting agents have limitations when it comes to formulating burnish-resistant coatings. Orgasol® polyamide 12 powder offers a unique combination of properties, which makes it the additive of choice for the formulator.

Orgasol® PA12 powder key properties for burnish resistance:


  • Unique spherical shape and narrow particle size distribution

  • Wide range of particle size, from 5 to 60 microns

  • Semi-crystalline polyamide 12 : a combination of hardness and flexibility

  • Good compatibility with all binders

Furniture Coating Formulation: A deep matte, clear, burnish resistant topcoat

A 2-component polyurethane deep matte coating formulated using Orgasol® polyamide 12 powders. 

Weight Composition % Formulation Supplier
PART A    
Butyl Acetate 9.2  
SYNOCURE® 213 BA 50 33.4 ARKEMA
OCTA SOLIGEN ZINC 8% 0.1 Borchers
Butyl Acetate 16.2  
Solution CAB 381-2 (10% AB-PMA) 28.7 Eastman
BORCHI® GOL LAC 80 (10% in ethyl acetate 0.2 Borchers
ORGASOL® 2001 UD NAT1 2.5 ARKEMA
ORGASOL® 2002 D NAT1 3.0 ARKEMA
PART B    
DESMODUR® N75 BA 3.2 Covestro
Butyl Acetate 6.0  

Orgasol® and Synocure® are registered trademarks of Arkema Inc. Borchi® is a registered trademark of Borchers GmbH. Desmodur® is a registered trademark of Coverstro Deutschland AG

Burnish Resistance Test

In order to evaluate burnish resistance, a coated panel is submitted to rubbing using a felt pad for a defined number of cycles. After rubbing, the gloss of the coating is measured and compared to the initial gloss.  The lower the gloss increase, the better the burnishing resistance.

A comparison of Orgasol® PA12 powder performance with a standard matting agent, silica

Burnish Chart.PNG

formulation-1-silica.png formulation-2-silica-and-op.png formulation-3-op.png

The superiority of Orgasol® polyamide 12 powder is clear as no change of gloss is observed after the burnishing test was performed. Even a partial substitution of silica with the adapted Orgasol® PA12 powders improves significantly the burnish resistance of the coating, while keeping a very low gloss.