Product Model: ADM-TQ
Appearance color: Transparent liquid
Packing specification: 5KG/25KG/160KG
Main application: ADM-TQ anti-mildew agent for wall coating is widely used in anti-mildew and anti-corrosion treatment of internal and external decoration coatings of buildings.
Water-based air-drying alkyd coatings and solvent-based alkyd coatings have basically the same automatic oxidation drying mechanism, but due to the presence of a large amount of water dispersion media and the influence of neutralizers, surfactants, etc., it will bring many new coatings problem. The application of water-based driers in water-diluted alkyd and water-emulsified alkyd are discussed below.
Water-reducible alkyd paint
Factors affecting the drying performance of water-dilutable air-drying alkyd resin coatings include basf montan wax resin, drier, temperature, humidity and solvent, as well as storage conditions and stability, pigment varieties, neutralizers and other factors. In the early days, people found that compared with the water-dilutable alkyd paint with the same type of alkyd as the base material, the drying of the former is slower than the latter, and the equation y=1.5x+ 1, y is the drying time of water-diluted air-drying alkyd paint, Wang is the drying time of the same type of solvent-based alkyd paint. This shows that the water in the water-based alkyd coating may extend the drying time, and the dryness gradually decreases during the storage process, resulting in a “loss of dryness” phenomenon. In recent years, after in-depth research and continuous improvement of the above influencing factors, while optimizing the drier system, water-based alkyd coatings have completely reached the drying level T60 of solvent-based alkyd coatings.
Effect of neutralizer
The neutralizer is mainly used to react with the free carboxyl groups in the alkyd resin to produce salt groups, so that the resin is dissolved in a co-solvent and then dispersed in water, and can be diluted with water. At present, ammonia, triethylamine and N,N-dimethylethanolamine are commonly used. Studies have shown that neutralized alkali (especially ammonia) can “inactivate” the cobalt drier by complexing the cobalt drier, reducing the drying effect and indirectly affecting the drying time of the coating film (see Table 6-26) . If the cobalt drier is complexed with potassium, the influence of the neutralizer can be reduced.
Leave a message
We’ll get back to you soon