Avaliação de diferentes tipos de neutralizantes e suas influências no desempenho das tintas látex standard em substituição ao hidróxido de amônio

Abstract

Currently, Brazil is among the five largest paint markets in the world. However, industries are constantly innovating their production chain, in order to offer more sustainable products that include the sustainability pillar such as the reduction of volatile organic compounds (VOCs), occupational health and the environment, maintaining quality and price competitive in the market. As a result, the proposed study deals with the evaluation of the performance of different types of neutralizers (alkalinizers and adhesion promoters) in latex paints to replace ammonium hydroxide (NH4OH). NH4OH is a toxic product and difficult to handle due to the evaporation of ammonia. However, on the other hand, it is a great neutralizer, stabilizer and efficiently helps the manufacturing process of latex paints. To ensure the behavior and good performance of the proposed replacement, the latex paints were subjected to several laboratory tests such as pH, viscosity, density, wet and dry covering power, resistance to wet abrasion, yield and yellowing degree, following the norms of evaluation methodologies for latex paints published by ABNT. The results obtained were compared to the minimum performance requirements published in the ABNT requirements standards, aiming to certify that the latex paint would meet the specifications and indications for use. Through this change it was possible to reduce the costs per kilogram of the product, since the adhesion promoters, by increasing the abrasion resistance of the paint film, end up reducing the amount of resin in the formulation. With this work it was also possible to catalog the performance characteristics of each sample when replacing ammonium hydroxide, as well as the stability of the finished product.