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Axalta Presents Method for Finding Non-crosslinked Components in Cured Coatings

Published on 2015-08-24. Author : SpecialChem

GLEN MILLS, Pa. -- Dr. Stacey Korf, a Research Associate at Axalta Coating Systems, one of the leading global manufacturers of liquid and powder coatings, presented a new method for determining the presence of non-crosslinked components in cured coatings. Dr. Korf presented her findings at the 250th American Chemical Society National Meeting & Exposition in Boston, Massachusetts on August 16, 2015. The meeting and exposition typically attracts more than ten thousand attendees, including industrial and academic experts from around the world.

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Fig. 1: Axalta

A cured coating is typically comprised of components that crosslink to form a polymer network. This network can help provide desired coating properties like coating strength, durability, appearance, and corrosion protection. In addition, there are also non-crosslinked components that are not chemically attached to the network. These non-crosslinked components can have an impact on the overall film performance and appearance, and may lead to coating defects, reduced chip resistance and reduced color stability. Information pertaining to the identity of these non-crosslinked components is difficult to obtain.

“Currently, there is no suitable method available to meet our needs. To understand their identities and possible contributions to coating properties, we developed a solvent-based method to extract non-crosslinked components from cured coating films,” said Dr. Korf. “We then analyzed the extracts using gas chromatograph equipped special detection technologies. Mass selective and thermal conductivity detectors, pyrolysis detectors, and gel permeation chromatography were used to identify and quantify the non-crosslinked components extracted from the coating films.”

Using this method, Dr. Korf and her team identified and measured a number of non-crosslinked components, such as solvents trapped in cured coating films, un-reacted crosslinkers, un-reacted resin components, and other components that are not part of the crosslinked coating film network. This level of insight and detailed understanding are critical to designing and formulating coating systems with optimal performance characteristics.

About Axalta Coating Systems


Axalta is one of the leading global companies focused solely on coatings and providing customers with innovative, colorful, beautiful and sustainable solutions. From light OEM vehicles, commercial vehicles and refinish applications to electric motors, buildings and pipelines, its coatings are designed to prevent corrosion, increase productivity and enable the materials it coat to last longer. With nearly 150 years of experience in the coatings industry, the approximately 12,800 people of Axalta continue to find ways to serve its more than 120,000 customers in more than 130 countries better every day with the finest coatings, application systems and technology.

Source: Axalta

 


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