Water-based Polyurethane

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We develop research in the area of nanotechnology since 2010, currently with FINEP project aimed at adding inorganic nanofillers in aqueous dispersion of commercial polyurethane system used as the basis for special inks used in the coating of surfaces such as wood and tiles.
Currently, the concern with the reduction of environmental impacts caused by solvent-based commercial products is a common fact, particularly with the limitation of products containing volatile organic compounds. As a result, these products have been replaced increasingly by commercial waterborne products. This latest technology "water­based" has been used in the formulation of various types of commercial products for coating surfaces, including, polyurethane waterborne paints.
The properties of these paints can be significantly improved by introducing the inorganic nanofiller polyurethane matrix ­ nanocomposite formation. The application of nanoparticles as fillers is interesting, that present the different properties of chemically similar macrocrystalines materials.
At a time when the world seeks solutions for environmentally friendly products that are free of organic solvents becomes extremely important to develop products whose performance equals or exceeds ace traditional paints solvent­based, It is estimated that daily consumption is 15,000 gallons / day of ink applied on wooden openings in the state of Rio Grande do Sul. Despite the attempt of several companies to market said solvent-borne paints "low odor", they still have lots of solvent in their composition and these solvents have only a destination, to contribute to environmental pollution, especially with the greenhouse effect.
The subject coatings water based it also imposes more clearly when we observe the very poor performance of these products to external openings (STAINS) "clear" where it is required reapplication almost annually. Knowing these technological limitations of market products, Exceller Coatings proposes to develop a 100% water based which will keep for at least three years, avoiding the emission of solvents to market products, and avoiding the annual reapplication of these products . The water­based formulations for this purpose in fact been developed, but its performance is justified only with the use of crosslinkers based on polyamines, which constitutes an additional complication to this type of product, still having a sufficient performance.
The attempt to align this need of performance required by the market and the design of a polyurethane­based aqueous nanodispersions is necessary in order to seek an innovative, high performance and environmentally friendly.
Impacts generated by the project
  • The use of Brazilian minerals as a source of inorganic nanofillers;
  • Production of knowledge on the effect of microstructures of nanofillers on the characteristics and final properties of polyurethane aqueous dispersions and formulated ink;
  • Publication of the main results in meetings, conferences, seminars and magazines;
  • The improved properties of these special paints obtained from PU Aqueous nanodispersions promote increased life time of the applied inks and substantial reduction in VOC emissions into the atmosphere;
  • The formation of new domestic technologies in strategic area (nanotechnology) and the absorption of these by Brazilian industry;
  • Integration between the University and industry;
  • Reduction of the final product costs due to the reduction of imported raw material used;
  • Reduced costs to the client based on the useful lifetime increase of the final product;
  • The generation of new products based water meets a growing demand with regard to environmental issues and the restrictive laws force the release of volatile organic compounds (VOCs);
  • Exploitation of mineral resources clean;
  • Decreased generation of toxic residues due to the useful life of the final product;
  • Training of human resources specialized in the field of polymeric nanodispersions;
  • The manufacture of new products by the domestic industry enables increased demand new jobs;
  • Transfer of knowledge and technology community;
Among thousands of projects submitted to the Ministry of Science and Technology, ours was one of 11 projects approved throughout Brazil.