GMA Acrylic Powder Coating

GMA Acrylics

GMA acrylic powders are based on glycidyl methacrylate (GMA) functional acrylic polymers. These chemical groups react readily with carboxyl groups. DDDA (dodecanedioic acid) is the most common curing agent for GMA acrylic resins and is somewhat crystalline in nature. This physical feature enhances flow and leveling, which provides excellent smoothness and high gloss. GMA acrylics are well known for their superior weathering resistance, which easily eclipses 10 years of Florida durability. Not only does this technology possess excellent UV durability and scratch resistance, it also offers outstanding resistance to environmental contaminants (e.g., acid rain), petrol, and automotive cleaners and chemicals.

GMA acrylic powders have been used as a high-performance clearcoat for automotive alloy wheels since the 1980s. In addition, BMW used clear acrylic powder topcoats for their 5 and 7 series cars produced from 1998 to 2014 in their Dingolfing, Germany, assembly plant. GMA acrylic powders are used for an array of other demanding coating requirements, including automotive exterior trim parts, door and security hardware, kitchen and bath water taps, and architectural trim components.

While GMA acrylic powders are typically cured between 175 to 190°C, specialty formulations can cure as low as 150°C and below. This opens the possibility of coating high-temperature plastics and composites.