2-Amino-2-Methyl-1-Propanol in Paints and Coatings: A VOC Exemption Story

摘要

A primary amine produced by ANGUS Chemical Company, 2-amino-2-methyl-l-propanol (AMP), has been used as a neutralizer, pH adjuster and co-dispersant in water-based architectural paints since the early 1970s. AMP has helped formulators meet a broad range of requirements including in-can stability, moisture and scrub resistance, gloss development and color stability. This unique amino alcohol has enabled reduction of other components, including primary dispersants, which can remain in the film and reduce moisture resistance. Finally, AMP helps paint producers and consumers avoid odor issues associated with ammonia. Regulations in the U.S. have forced architectural paint manufacturers to reduce volatile organic compounds (VOCs) in their formulations below 50 grams/liter. In addition, consumer requirements have forced the industry to develop formulations containing less than five grams/liter VOC. This presents a tremendous challenge in maintaining the expected levels of film performance. Inorganic neutralizers, in particular sodium hydroxide and ammonia, have been the only alternatives available. However, performance in several areas including pH stability and moisture resistance is often less than optimal. Use of AMP would be much preferred, given its favorable impact on paint performance relative to inorganics, and effective June 25, 2014, AMP is exempted by the U.S. Environmental Protection Agency (EPA) from regulation as a VOC. This presentation will review the VOC exemption petitioning process for AMP, and the supporting information leading to the exemption.