Isocryl EP-581 LT

GENERAL DESCRIPTION
Isocryl® EP-581 LT is a glycidyl-functional acrylic hardener designed to produce low gloss, exterior-durable polyester powder coatings. Benefits include consistent gloss, smooth matte appearance and dependable performance. Standard and superdurable polyester resins used for TGIC, Primid or Araldite PT-912 powder coatings are well suited for use with Isocryl EP-581 LT. A key advantage is its lower cure capability over conventional matting hardeners and its predecessors Isocryl EP-570G and EP-575G.

ISOCRYL EP-581 LT HIGHLIGHTS
Designed to achieve <10 gloss pigmented coatings with a variety of standard and super-durable resins in a single extrusion system. Best results for chemical and mechanical properties are achieved by formulating a polyester resin with acid value 35 and Isocryl EP-581 LT at a 70:30 ratio with a second crosslinker such as Primid® XL-552 at 1% on total formulation. Primid QM-1260, TGIC, PT-912 are also suitable as a second crosslinker.

Formulations with Isocryl EP-581 LT are very stable to multiple extrusions indicating good process stability and have minimum gloss change with different cure temperatures, film thickness variations or part mass.

It is recommended that formulated powders be tested for both physical and chemical advancement when stored at elevated temperatures.

STORAGE AND HANDLING
Keep container tightly closed and store in a dry, well ventilated area away from heat and sources of ignition. Store Isocryl EP-575G and finished formulations containing Isocryl EP-581 LT at ≤30°C for optimal performance. Shelf life of unopened containers is one year from date of shipment.