Water-based coatings also have its shortcomings: (1) The drying time is longer during film formation, especially in low temperature and high humidity environments; (2) Due to the high surface tension of water, it is difficult for the water-based coating to wet the substrate; (3) Water is used as a solvent, the metal matrix is ​​easily corroded; (4) The compatibility of the film-forming resin with water is not good, resulting in poor storage stability of water-based coatings; (5) Because the freezing point of water is higher than most organic solvents , The freeze-thaw stability of water-based paint is poor; (6) It is easy to suffer microbial damage. Stored in a cool, dry and ventilated place has a one-year shelf life. Anticorrosive paint is an important water-based paint in the industry. As the name suggests, it is a paint that uses water as a solvent or as a dispersion medium. Water-based paint includes three types: water-soluble paint, water-reducible paint, and water-dispersible paint (latex paint). Water-soluble coatings are based on water-soluble resin as the film-forming material, represented by polyvinyl alcohol and various modified products, in addition to water-soluble alkyd resin, water-soluble epoxy resin and inorganic polymer water-based resin.
From the composition of oil-based coatings and water-based coatings, we can clearly know that the biggest difference between these two coatings is the difference in solvents. In fact, the fluorescent whitening agent is also divided into oil-soluble and water-soluble, so oil-based paint must use oil-soluble fluorescent whitening agent, and water-based paint must use water-soluble fluorescent whitening agent. Because the coatings are all liquid and applied to the surface of the object, there are higher requirements for the dispersion, stability and weather resistance of the fluorescent whitening agent. So which fluorescent brightener should be used for oil-based paint and water-based paint? Lianda Chemical will introduce the commonly used oil-based paints and water-based paint brighteners. The surface drying time of water-based paint is 20 minutes, and the actual drying time is 15 hours. The surface drying time of traditional paint is 2 hours, and the actual drying time is more than 30 hours. Call the national toll-free number immediately to consult Chenguang Chemical: water-based anticorrosive paint! New customers can enjoy exclusive discounts on online orders. Traditional solvent-based coatings have been widely used because of their good comprehensive mechanical properties and surface properties. In recent years, many countries have successively promulgated laws and regulations concerning the control of volatile organic compounds (VOC), which has enabled the rapid development of water-based coatings.
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When it comes to water-based coatings, we all know that water-based coatings are mainly made of some resins and some additives. What are water-based coating additives? Let's take a look at what is water-based coating additives and water-based coatings. What are the additives for your reference. What are water-based paint additives? What are the environmentally friendly water-based paint additives that use water as a diluent, which is harmless to human health, while oil-based paints use banana water and thinner as diluents. It contains xylene and other harmful carcinogens.