How to solve the water - based acrylic paint back adhesion problem? - ask a water-based paint expert Problem: How to solve the water - based acrylic paint back adhesion problem? Water - based acrylic paint back adhesion is a problem often encountered by water - based paint formulators.In order to solve the problem of water - based acrylic paint adhesion, we must fundamentally understand the reason of water - based acrylic paint adhesion .The readhesion of waterborne acrylic paint is due to the increase of rheological properties of linear thermo plasticpolymer at higher transition temperature than glass.The solution of water - based acrylic paint back adhesion can be considered from several perspectives. 1.High Tg acrylic resin was added and fast volatile film forming agent was used 2. Use self-crosslinking acrylic resin as far as possible 3.Choose acrylic emulsion with smaller particle size as far as possible 4.Add PUD. PUD has a certain thermosetting property and can reduce thermoplasticity 5.Add the wax emulsion. Wax emulsion can form wax film on the coating surface and reduce the surface viscosity 6.If the resin system contains carboxyl group, a little metal salt such as zinc or oxide can be added to play the role of ion crosslinking 7.Add filler with smaller particle size For more information about waterborne coatings, you can also visit the Sinograce Chemical industry news waterborne coatings repository, and the recipes in our waterborne coatings repository.Or ask questions directly to us through our water-based paint expert column. To promote waterborne paint in China is the goal of Sinograce Chemical. I hope you found the above explanation helpful. Sinograce Chemical produces acrylic emulsion, acrylic resin, for water based ink emulsion, Water Based Adhesive, water based industrial paint, water based building glue and other water based coatings. visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone :+86 0551 63459511

How to solve the poor adhesion of water-based paint after soaking in water? Problems: water-based acrylic resin, self-drying system,60 ℃ / 120 minutes after the bubble row down into the water, can use fingernail.But after taking out to wait for water to be able again, how should solve? Response: This test method is still very harsh.General water - based resins, acrylic acid, polyurethane or Self-crosslinking single component system, are difficult to meet.Consider the following alternatives： 1.Avoid resin systems with common surfactants. 2.If the resin system contains carboxyl group, why consider adding zinc salt to increase the crosslinking degree? 3. You can also consider adding some wax emulsion to increase the hydrophobicity of the formula. Sinograce Chemical produces acrylic emulsion, acrylic resin,water based polyurethane resin , wood paint, water based industrial paint, water based building glue and other water based coatings. visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone :+86 0551 63459511

Ask the water-based paint expert -water-based glass paint appears prickly heat when baking Problem: I use water-based acrylic and amino resin to make the glass paint when baking prickly heat. The details are as follows: Temperature: 80 degrees Time: 2 minutes It was already smooth when it was put into the oven Flash dry for 10 minutes Has been changed to defoamer, leveling agent, solvent, no effect. I would like to ask if there is any way to eliminate the prickly heat . Thank you . Answer Analyze (1) because your baking temperature is 80C, then the coating temperature is the highest but 80C, at this temperature, if you do not add a lot of catalyst in the system, there should not be any chemical reaction to cause bubbles. (2) the bubbles you see are probably caused by substances with low boiling points in the original recipe. Usually amino resins should not have this kind of problem. The problem may lie in other components of your recipe . Solution You might as well do an experiment, starting with the acrylic resin, one by one component to add, after each addition do coating baking experiment, until find the component foam . For more information on water-based coatings, you can also visit SINOGRACE CHEMICAL water-based coatings knowledge base, and our water-based paint recipes for water based metallic paints. It is SINOGRACE CHEMICAL goal to promote the development of waterborne paint in China. I hope you found the above explanation helpful. For more information on water-based coatings, you can also visit SINOGRACE CHEMICAL water-based coatings knowledge base, and our water-based paint recipes for water based metallic paints. It is SINOGRACE CHEMICAL goal to promote the development of waterborne paint in China. I hope you found the above explanation helpful. Sinograce Chemical co., LTD produces chemical additives for water based paint, such as defoaming agent, thickening agent, leveling agent, wetting agent visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone :+86 0551 63459511

Common problems with water-based paint: the coating contains bubbles and degassing Phenomenon: During the production of waterborne coating, it is found that the coating contains bubbles after thickening.The bubble volume is big bubble, the volume is small bubble, This kind of phenomenon often happens in paint of equal thickness thick pulp of elastic drawing. Bubble may cause pinhole or prickly heat and affect the appearance of paint film. Explain: Formation of air bubbles in waterborne coatings: In the paint manufacturing process, the dispersion of pigments and fillers, the stirring in the thickening and varnishing process, the vibration of the finished coating during the filtration and packaging process, the mixing of the paint in the toning process and the color paste, the introduction of air by the agitation, the air in the water The coating is stabilized by a surfactant and becomes a bubble in the coating.Specific to the water-based coating formulation and production process, the bubbles generated in the paint manufacturing process are mainly in the following processes. 1.The improper feeding sequence of pigments and fillers in the dispersing stage may easily lead to the generation of micro tip bubbles, especially in the coating system with high proportion of ultrafine fillers and high solids.The fillers with fine particle size have large specific surface area and absorb more air. They should be first put in at low viscosity to facilitate foam escape.If the fine particle size filler is put in the final stage, the slurry viscosity is high after the feeding of the fine filler, and a large amount of air brought by the fine filler enters the slurry to form microbubbles. It is difficult for the microbubbles to aggregate and rise until the surface of the coating is broken, so that it is difficult to escape the gas in the coating. 2.Excessive surfactant is used in the formulation of water - based coatings.The vibration in coating production, filtration and transportation, as well as the coating from the height of the dumping, mixing will produce bubbles again difficult to come out. 3.The design of the dispersing disc tooth of the dispersing machine is not reasonable, or the dispersing disc is placed in an improper position in the coating during the dispersing process. Under high-speed stirring, a large amount of air is brought into the high-speed dispersing coating by vortices. Prevention and solutions: 1.Water-based coating production feeding should be in the order of first fine then coarse, which is conducive to the emergence of bubbles and prevents the generation of microbubbles; 2.Wetting agent should not be overused in the production of water-based paint formula. Wetting agent should not replace dispersant. If you have to use for a certain requirement, it is appropriate to choose low foam wetting agent. Additional wetting agents are added during the paint conditioning phase.The antifoaming agent with high antifoaming ability was added into the ...