As the saying goes, three-point paint, seven-point painting. For water-based coatings, especially for water-based wood coating in the home improvement market, the level of coating technology has a direct impact on product use. In order to let everyone better master the water-based paint technology, we specially launched the water-based paint coating process series this week. The substrate treatment includes three steps: polishing, deburring and sealing. 1.Polishing The general wood surface to be painted should be ground first with 200# sandpaper and then polished with 600# sandpaper to make it smooth and smooth. The fine wood workpiece can be directly polished with 600# sandpaper. Fine sanding will make the wood grain tight and reduce the graininess of the grain. 2.Deburring After the wood is flooded, the water penetrates into the micro-gap between the wood fiber tube and the wood grain, causing it to expand and enlarge, highlighting the surface of the wood, and cannot be restored after drying.Therefore, after the water-based paint is applied to the wood, wood grain protrusions, granules, and burrs may occur. There are two ways to eliminate or reduce the occurrence of granulation and burrs after applying the first water-based paint. The surface to be coated is rubbed with a damp cloth that can be squeezed out of water to sufficiently wet the surface of the wood, and after drying, the formed burrs and granules are polished with fine sandpaper. Then apply a primer and dry it with a sandpaper of about 400#. The porous wood should be painted with two primers and then polished. At this time, the first primer should be diluted with 5% to 10% of water before use. The wood surface is closed with a wax-free shellac paint. This method is better than the wet method of water, in addition to preventing granulation and long burrs from being applied to the water-based paint, and also increasing the layering of the wood. However, due to the color of the shellac itself, the wood tends to have a light amber color.The shellac paint back cover is very useful for the old paint surface and the surface of wood that may have been contaminated by grease, mold release agent and silicone compound, which can prevent the construction of water-based paint from shrinkage, fisheye and other construction problems. If the painted surface is found during the painting process, especially when there are shrinkage holes and fish eyes after painting the old paint surface, the applied water-based paint should be wiped off, and then sealed with dewaxed rubber paint and then water-coated paint.Shellac paint is an alcohol solution of shellac, which can be applied by brushing or wiping. After the back cover, use sandpaper of 400# or more, and then wipe the cleaned surface with alcohol or a damp cloth to increase the adhesion of the topcoat. Please pay attention to the next step on the third step: the details of the water-based paint sealing Sinograce chemical industry co., LTD. Specializes...

What parameters of resin determine coating gloss? Question: What parameters of the resin determine the gloss of the film? Some people say that it is solid content, some people say it is OH value. So, what is the most important determinant of gloss? Answer: There are many parameters that determine the gloss of the paint film. The saturation of the resin: that is, its monomer structure, this index determines the absorption rate of light by the resin. For example, it is reflected that the monomer containing a benzene ring is lower in brightness than the saturated monomer. Polarity of the resin: The monomer structure also affects the polarity of the resin, which affects its surface tension and produces a surface phenomenon like fish orange peel, which affects gloss. Molecular Weight and Tg: These two indicators determine viscosity, ie, leveling. The better the leveling, the higher the gloss. Reactivity of the resin: The rapid occurrence of the crosslinking reaction is not conducive to leveling, thereby affecting the gloss. Particle size of the emulsion: If it is an emulsion resin, the particle size of the emulsion, the filming effect will also affect the gloss. sinograce chemical specializes in producing water-based acrylic resin, polyurethane resin and other special resins. For more information, please click here. visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone :+86 0551 63459511

In recent years, with the increasing awareness of environmental protection and the importance and legislation of governments in environmental protection, more and more anti-rust paints are turning to water-based.Many foreign customers have begun to demand waterborne anti-corrosive paints for domestic suppliers. After sinograce chemical successfully launched our water-based anti-corrosive paint|water-based anti-corrosion coating product series, we have received more and more inquiries about water-based anti-rust paint.Because waterborne anticorrosive paint is still a relatively new field in China, here are a few simple questions to consider when choosing a waterborne anticorrosive paint. The answers to these questions will determine the type and cost of waterborne paint. 1.Requirements for anti-corrosion performance of water-based rust remover: The most common anti-corrosion test index is the salt spray test result calculated by hour. When selecting water-based anti-rust paint, it should first clear whether there is a clear salt spray test in the material process requirements. Indicator, if any, how many hours the indicator is. The low requirements of the project may not require the results of the salt spray test, which can be as high as several thousand hours. 2.Water-based anti-rust paint requirements on the process conditions: the content of the process conditions can contain a number of contents. It mainly includes the composition of the coating, the coating method, the film thickness requirements, the drying conditions and the like. The composition of the coating means whether a two-component coating can be used. The coating method can include various processes such as spraying, rollers, and brushing. Whether there is heating and drying equipment at the construction site, and whether there is any restriction on the drying time, it is the content of the drying conditions. The difference in process will determine the performance requirements of the anti-corrosive paint. 3.Water-based anti-rust paint requirements: This problem is self-evident, but for water-based paints, the variables are larger than solvent-based paints. Due to the new stage of water-based anti-rust paint, the maturity of various technologies is different, and the cost gap is relatively large. The choice should be considered from the perspective of cost performance. 4. Waterborne anti-rust paint requirements for laws and regulations: As the main driving force of domestic waterborne anti-rust paint is still foreign customers, domestic manufacturers should choose the volatile organic content (VOC) contained in the water-based paint. The indicators such as monomer content are known, and relevant documents and certificates should be obtained from suppliers when necessary to meet the domestic regulatory requirements of foreign customers. Sinograce chemical specializes in the production of water-based anti-rust coatings for metal surfaces, water-based anti-corrosion coatings, please ...

How to deal with the surface of water-based anti-rust paint before painting As the saying goes, "seven-point paint three-point paint." The correct handling of the substrate can have a major impact on the performance of the coating. Waterborne anti-corrosive paint is no exception. During the processing, transportation and storage of the workpiece, the surface often has the molding sand, the slag dust and the oil and other contaminants left by the oxide scale and the rust mold.In order to make the deep layer firmly adhere to the surface of the workpiece, the surface of the workpiece must be cleaned before painting. Otherwise, it not only affects the bonding strength and corrosion resistance of the coating with the base metal, but also makes the base metal even Corrosion can also continue under the protection of the coating, causing the coating to peel off, affecting the mechanical properties and service life of the workpiece.Therefore, the surface treatment before the painting of the workpiece is an important guarantee and measure for obtaining a good quality protective layer and prolonging the service life of the product. In order to provide a good surface of the workpiece, the surface of the workpiece is treated before painting: 1.No oil 2. No rust and oxide 3. No adhesion impurities 4. No residue such as acid and alkali 5. The surface of the workpiece has a certain roughness Many solvent-based anti-corrosive paints and anti-rust oils have drying requirements in addition to coating, otherwise anti-corrosive paints or anti-rust oils cannot adhere. Waterborne anti-rust paint is not the case.Because water-based paint is water-based, it can be successfully attached to a wet surface, eliminating the need for drying. This is an advantage of water-based anti-rust paint. Sinograce chemical specializes in the production of water-based anti-rust coatings for metal surfaces, water-based anti-corrosion coatings, please click here for more information visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone :+86 0551 63459511