By BoB Cregg Sherwin-williamS
This alternative to TGIC-based
polyester powder coatings
ofers similar performance
and enhanced transfer
eficiencies.
Are TGIC-Free Powder
Coatings Right For You?
24
JUNE 2014 — pfonline.com
POwDer COaTinGS
Durability and weather-resistance are non-negotiable
requirements when specifying powder coatings for appli-
cations such as heavy equipment, agricultural vehicles,
outdoor lighting and architectural products, playground
equipment, and recreational goods.
For years, triglicydyl isocyanurate crosslinkers (TGICs)
have been employed in exterior, polyester-based powder
coating applications to provide those required characteris-
tics. TGIC cross-links the film within a powder coating. At a
certain temperature in the coating process, it reacts with the
polyester resin to create a durable, weather-resistant film
that adheres to a wide range of substrates.
A commercial alternative to TGIC powder coatings was
developed in the early '90s using beta hydroxyalkylamide
(HAA), an alternative crosslinker that reacts with the same
or improved versions of polyester resin used with TGIC.
HAA (TGIC-free) delivered a durable, UV-resistant finish
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