Improved Block Resistance in Low-VOC Acrylic Topcoats Without Fluorinated Additives
Author: Matt Andersson, R&D Senior Chemist and Karl Booth, R&D Technical Manager, Engineered Polymer Solutions, Marengo, IL
As customer needs and regulations drive VOC demands lower, difficulties arise when attempting to balance the multitude of film properties that consumers require. Currently, the lowest VOC restriction for waterborne industrial maintenance coatings is 100g/L, which can be a challenging target for coatings designed to offer substrate protection in addition to aesthetics. Traditionally, polymer hardness has been sacrificed through Tg reduction to ensure film formation at a reduced solvent demand. This can have a significant impact on film hardness, block and tack.
Presented at the Western Coatings Show in October, 2015
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