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

The internal structure of waterborne acrylic emulsion particles will affect several aspects of waterborne paint formulations.According to the order in which the effects are affected, the phase structure will first affect the selection and addition of the filming aid.Different phases have different hydrophilic/lipophilic characteristics, and the oleophilic properties of various coalescents are different. For example, dipropylene glycol methyl ether (DPM) is more hydrophilic than dipropylene glycol butyl ether (DPnB). Low oiliness.If the outer layer of the aqueous acrylic emulsion particles is a very lipophilic phase, the addition of DPM is not only ineffective for film formation, but also causes excess DPM to be free in water to affect other properties of the water based paint film. Another effect of the phase structure on the aqueous paint formulation is the effect on the film quality of the waterborne paint film.The key to film quality is that during the fusion of the aqueous acrylic emulsion particles, the phases that need to be mixed are thoroughly mixed, while the phases that need to be separated remain separated.If different phases are required to participate in the fusion, a mixed filming aid should be chosen for best results. Many domestic and foreign literatures on aqueous acrylic emulsion polymerization mostly mention the structural problems of various emulsion particles such as core shell. For example, various structures such as nuclear shell, half moon, multinuclear, hollow, and strawberry have been reported.While the description of these structures is useful for understanding the complexity of aqueous acrylic emulsion particle structures, the structure of aqueous acrylic emulsions is actually much more complicated.For example, only emulsions of single phase structured particles are absent. Particles in practical aqueous acrylic emulsions are distributed in a variety of structures, possibly with more core shells, possibly more strawberries, and the like.Waterborne acrylic emulsion manufacturers control the phase structure of aqueous acrylic emulsions by the choice of monomers, the order of addition, the amount of surfactant used, and the like. Since the phase structure of a typical aqueous acrylic emulsion is a technical secret of the emulsion manufacturer, this information is generally not disclosed.However, suppliers will provide recommended additives and ratios for their supplied acrylic emulsions. This is often the case for different aqueous acrylic emulsions that require different combinations of additives. Sinograce Chemical produces water-based acrylic coatings for various water-based coatings visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone               :+86 0551 63459511

Water - based acrylic emulsion formulation needs to be considered: water - based acrylic resin composition The choice of emulsion raw materials is the most important decision for engineers when formulating aqueous paint formulations.The main properties of the coating are determined by the resin.A wide variety of water-based acrylate emulsions, including polystyrene-acrylate emulsions, are on the market. Different aqueous acrylate resin compositions have a great influence on the film-forming properties and cost of the water-based paint.Here are a few simple discussion of the influencing factors. 1.Main ingredients： a.The main reason why styrene: polyacrylate emulsions are introduced into the monomer is that it can provide a higher glass transition temperature (Tg), thereby increasing the hardness of the film formation; another reason is cost.Styrene is used in the packaging industry and is one of the most important and mature downstream products in the petroleum industry. It is low in price but highly affected by the macro economy.However, the introduction of styrene, especially when it is more than 15% of the total monomer amount, also has many negative effects on the water-based paint film-forming property.First, the styrene-containing polymer segment lacks flexibility, macroscopically, the water-based paint film is hard and not tough; and the benzene ring contained in styrene is an ultraviolet light absorber. When the monomer content is high, The ultraviolet light passes through the adjacent benzene ring to shear the polymer chain, so that the water-based paint film becomes brittle, the gloss is decreased, and the life is reduced; the structure of styrene also determines its affinity for many organic solvents, water-based paint. The solvent resistance of the paint film is also significantly different from other resins. b.Acrylate monomers: There are many types of acrylate monomers, and the performance and price vary greatly.The most commonly used in China is butyl acrylate, which has the lowest cost. It is the monomer used by most emulsion manufacturers to match the styrene and make the emulsion of cheap wall paint. Its function is to provide the flexibility of the water-based paint film.Since the acrylate polymer main chain does not contain a group other than the ester group, the main chain and the ester group side chain are both flexible, so that the water-based paint film lacks hardness. Although this type of polyacrylate emulsion is the choice of interior and exterior wall coatings, performance is not enough as a wood lacquer with high hardness and toughness requirements. c. Methacrylate monomers: Methacrylate monomers, which are a step further in performance than acrylate monomers.Since the methyl group has a methyl group on the main chain, the activity of the main chain is restricted, the main chain is strengthened, and the ester side chain provides flexibility, so that the methacrylate type The body has the best balance of hardness and t...

Adding certain kinds and dosages of substrate wetting agent and adhesion promoter to the transparent base formulation helps to improve the adhesion of the paint film; the type and quality of the color paste are not only related to the phase of the color paste and the transparent base. Capacity also has a certain influence on the adhesion of the paint film. The thickness of the paint film, the drying time of the paint film, and the temperature and humidity of the paint curing environment are all important factors affecting the adhesion of the water-based glass paint film.From the viewpoint of the adhesion mechanism of the paint film on the substrate, the polarity of the paint film and the surface to be coated, the cohesion and thermal expansion coefficient of the paint film, and the wettability of the paint liquid to the substrate,Theoretically, the quality of the paint film adhesion performance is determined. Sinograce Chemical produces wetting agent and tackifier for all kinds of waterborne coatings,Welcome to consultation. visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone               :+86 0551 63459511