Question: Dear expert, I am now eager to develop a new water-based paint mainly for wood. The problem that needs to be solved urgently is the drying time of water-based paint. I want his dry time to be in 30 seconds, can you achieve excuse me, excuse me be colophony its key effect. Response: Hello, the dry time of water - based paint has two concepts commonly."Surface dryness" refers to the basic dryness when touched, while "actual dryness" describes the state in which water completely evaporates.For your problem, I guess you are referring to the dry surface time of the paint. Usually the surface is required to evaporate at least 80% of the water.The evaporation rate of water is slower than that of solvent-based paints. This is a physical property that cannot be changed.The only way to speed up the evaporation rate of water is to bake. Our experience is that for a 20 micron thick film, the substrate temperature is above 150C, and it is possible to evaporate and dry most of the water in about 60 seconds, which is generally unrealistic for wood. The type of resin does have an effect on the drying rate.Such as Sinograce Chemical of Special resin polymer for Acrylic Industrial coatings PF - 136 is outstanding in terms of quick drying.But the best resin is unmatched by the 30-second indicator you mentioned. I do not know why you "dry time within 30 seconds" requirements? Is it possible to extend the drying time by changing the process?You can also check out our blog for a special article on how to achieve quick drying in recipes. Quick drying (2)。For more information about water-based coatings, you can also visit Sinograce Chemical'swater-based coatings knowledge base, and the recipes in our water-based coatings library. Or ask questions directly to us through our water-based paint expert column . 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

Common problems of water-based paint: causes of shrinkage and solutions Shrinkage, known as cratering, is a common problem with water-based paints。The main cause of shrinkage cavity is impurities in water-based paint. In particular, there is oil in the area where the shrinkage cavity occurs, making the area unable to be wetted.In practical operation, the main causes of shrinkage cavity are as follows: 1.The substrate is contaminated with oil or impurities 2.Apply a paint to the old paint or finish without sanding 3.The construction interval between the two paints is too long 4. Too much defoamer in the paint The difference in surface tension is the main cause of the formation of shrinkage cavities.Low viscosity of the coating is conducive to the flow of the coating, and low thixotropy increases the flow time of the coating. Not conducive to the control of shrinkage holes.Therefore, reducing the source of shrinkage cavities which cause a difference in the surface tension of the coating, improving the viscosity of the coating and improving the thixotropy are all favorable for resisting the formation of shrinkage cavities.Specifically, the shrinkage cavity can be reduced from the following aspects: 1.Thoroughly polish and clean the substrate, and seal it with shellac if necessary 2.Shorten the interval and polish the surface to be painted 3.Add leveling agent appropriately 4.Check the compatibility between the antifoaming agent and the system, and choose the defoaming agent with good compatibility 5.Use a hydrophobic dispersant in combination with a high molecular weight thickener, and appropriately add an antifoaming agent to prevent agitation and foaming. Sinograce Chemical production chemical additives for water based paint, such as defoaming agent, thickening agent, leveling agent, wetting agent, welcome to consult, there will be professional recommended for you. visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone :+86 0551 63459511

Problem：Some of the materials used in the construction of wood products are plywood and wood chip fiberboard. One of the rubber is the most afraid of water, water paint spray will dissolve the inside of the glue. The effect that USES close lacquer also is not ideal, how should solve? Is it easy to use sinograce chemical raw material solution? thank you . Response:This type of wood is usually bonded with a phenolic resin, which is water-resistant.Are you sure the glue has been dissolved? What is the phenomenon that you see? Is the wood deformed, not necessarily the glue dissolved?The commonest problem of waterborne coating is lumber be out of shape, this is the hydroscopicity that causes as a result of lumber itself. We've just published an article on wood ridges on our website, and it describes some of the treatments.Including the use of our Special resin polymer for Acrylic Industrial coatings PF - 136 products, you can refer to it. It is sinograce chemical goal to promote the development of waterborne paint in China. I hope you found the above explanation helpful. Sinograce chemical Specializes in producing waterborne coatings, waterborne wood lacquer,topcoat ,primer etc. To learn more, please click here visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone :+86 0551 63459511

Wood bumps - Common problems with water paint Wood grain is exposed when broken or damaged wood comes into contact with water.A good example of this is when a curved toothpick is placed in water, it will draw water through the capillaries, elongate, and straighten.When the fibers on the board are exposed, they suck water into the wood like a straw, causing the fibers to swell and stick to the surface. Woodiness processing is having main effect to grain protuberance. Plywood made with a blunt saw blade has more damaged wood fibers and has a "fuzzy" feel to the surface.Hardwoods with pipe holes often have wood ridges in the wooden pipe-holes . Red oak usually has triangular wood grain protuberance sometimes, wood fiber two ends join in board surface, and among protuberance, form an inverted "V" wood grain protuberance.Such ridges are very difficult to remove.Sanding is merely a temporary flattening of the wood fibers.When the next layer of water-based paint is applied to the wood surface, the wood fibers will resurface.A more effective method is to use a hard brush or wire brush to remove wood fibers or pipe holes before painting. Although ridges are almost impossible to remove, we can add some steps to the recipe to reduce the occurrence of ridges.One way is to use a saturated coating. A typical saturated coating is a transparent coating of 3-4% adhesive solids.A typical saturated coating is a transparent coating of 3-4% adhesive solids.On the wood substrate, apply the saturated coating between any coating added.The effect of saturated coating is to cause grain process, and wood grain coagulation, so that wood grain in the saturated coating drying can not relax.Next, gently polish to remove the worst grain. Scotchbrite, by Scotchbrite, is the preferred tool for this type of sanding because it is not good for breaking more wood. A quick-drying coating can also help reduce ridges.A quick film-forming or water-based coating that removes water quickly can limit water intrusion into the wood fibers, thereby reducing the ridges.Sinograce Chemical of Special resin polymer for Acrylic Industrial coatings PF - 136 with a small particle size, good permeability, quick drying, etc, especially suitable for closed application of timber, effectively prevent because of the wood fiber water swelling and shrinkage problem.In addition, azeotropic solvents such as ethanol and isopropanol help to remove water from the coating. If such a method is used, care must be taken not to increase the formation of microbubbles while shortening the drying time. Additives that limit the flow of water and prevent it from entering the substrate will naturally reduce ridges. Compared with other thickeners, alginate, CMC and HEC really thicken the water, rather than reacting with polymers and pigments, and have no effect on thickening the continuous phase of the coating. Finally, the best way to prevent ridges is to use a hybrid system, which is a combination of water-based and solven...