Isocryl EP-575G

With carboxyl-containing polyesters and Primid XL 552 as a co-hardener, silky gloss, exterior-resistant “one-shot” powder coatings with excellent mechanical properties and good chemical resistance

ISOCRYL EP-575 is a glycidyl-functional acrylic copolymer designed for use as a hardener capable of producing matte exterior-durable polyester powder coatings with excellent impact and chemical resistance compared to previous generations of acrylic matting hardeners. Additional benefits include smooth cured film appearance and low contamination characteristics.

FORMULATING GUIDELINES
In standard white and black formulations, a binder comprising 20-30% ISOCRYL EP-575 acrylic resin with 70-80% linear carboxy polyester (acid value = 30 – 35mgKOH/g, Tg = 55 – 60 °C) provides coating compositions with optimal mechanical and chemical resistance in the matte range.

ISOCRYL EP-575 coating compositions require use of a secondary crosslinking additive such as Primid XL552 (EMS-CHEMIE) to achieve outstanding impact resistance, chemical resistance and adhesion. Primid XL-552 levels at 1 – 2.5% based on total formulation weight generally provide optimal performance.

Product Appearance Additional quantity* [%] Additional information
Isocryl® EP-575G Granules  20–30 to 70–80 Polyester with SZ 30–35 120–140 °C Melting point

*Calculated on total recipe