Abstract The effect of structural factors, including the type of diisocyanates and glycols, degree of crosslinking, hard‐segment content, crystallinity and hydrophilic group content, on optical properties of waterborne polyurethane (WPU) was investigated. Based on the relationship between structure and properties, a series of self‐matting WPUs with excellent transmittance were synthesized. Results demonstrated that refractive index of constituent groups was an important factor to influence the … Continue reading Synthesis of self‐matting waterborne polyurethane coatings with excellent transmittance

Abstract The durability of stone monuments is a constant problem as their decay through weathering is irremediable and endless. Fortunately, coatings are becoming more and more efficient and tailored to specific alterations of the stone material. This study aimed at developing an eco-friendly coating with both hydrophobic and biocide properties based on a silane/siloxane emulsion as a water repellent combined with chitosan and silver nitrate … Continue reading A new preventive coating for building stones mixing a water repellent and an eco-friendly biocide

Abstract Self-cleaning paints are capable of removing undesirable substances on their surface in the presence of the incidence of light. However, the photocleaning is not selective and, in addition to pollutants, the paint matrix of the polymer can be degraded. Therefore, in order to develop a suitable self-cleaning paint formulation it is necessary to find a balance between the non-selective activity and the degradation of … Continue reading Towards an efficient and durable self-cleaning acrylic paint containing mesoporous TiO2 microspheres

In this study, the high UV-shielding nanocomposite coatings based on pure acrylic emulsion and R-TiO2/or ZnO nanoparticles were successfully prepared. The effect of the nanoparticles on the photostability and UV shielding efficiency has been studied by using a UV/condensation weathering chamber equipped with UVB-313 fluorescent lamps. The obtained results showed that the coatings with the 2 wt% R-TiO2/or ZnO nanoparticles and a thickness of 45 μm have … Continue reading Effect of R-TiO2 and ZnO Nanoparticles on the UV-shielding Efficiency of Water-borne Acrylic Coating

ids are organic solvents that are widely used to accommodate the film formation of waterborne coatings. The influence of the volatility, hydrophilicity, and amount of coalescing aids on the properties of waterborne dispersions and the dynamics of film formation was investigated. The results show that coalescing aids increased the viscosity through particle swelling and solvation, with the effect being stronger with more hydrophilic solvents. The … Continue reading Influence of Coalescing Aids on The Latex Properties and Film Formation of Waterborne Coatings

This report briefed about the photo-catalytic and anti-bacterial activities of nanoporous magnesium oxide (MgO Nps) prepared by simple gel-combustion method. Further, MgO Nps dispersed alkyd coating (MOA) was prepared by mixing MgO Nps in resin matrix along with suitable non-toxic additives using high energy ball milling technique. The prepared MOA coating possesses self-cleaning behavior, degrades methyl violet dye when exposed to sunlight. Anti-bacterial activity of … Continue reading Nanoporous MgO as Self-cleaning and Anti-bacterial Pigment for Alkyd-based Coating