With the development of The Times, people's invention is more and more magical, super hydrophobic coating is one of them, the use of the product can make the surface of the pollutants or dust can be gravity, rain or wind and other external forces automatically removed or degraded.What factors will affect the coating hydrophobicity, let us know about it. 1 hydrophobic principle The wettability of water on a solid surface is related to the state of the solid surface.For different permeability models, the roughness of solid surface is different. Water is usually affected by Young s equation on an ideal smooth plane.When the solid surface has a certain roughness, the equation is not applicable to the wettability model of rough surface mainly including Wenzel model.The model has an important assumption: it is assumed that liquid can always fill grooves on rough surfaces, which does not seep liquid into the rough mechanism.In this case, the Cassie-Baxter model is mainly used, which assumes that the droplet base on the rough surface is compound contact, and the apparent liquid-solid interface is actually composed of solid and gas. 2 Factors affecting the hydrophobicity of coating The hydrophobicity of the coating is mainly determined by the chemical composition of the coating and the physical structure of the surface. The chemical composition mainly affects the hydrophobicity of the coating as a chemical group with low surface energy. At present, the widely used hydrophobic coating has fluorine coating, silicon coating and paraffin fluorine coating. The surface energy of fluorine group in fluorine coating decreases with the substitution of fluorine atom number, so fluorine atom number increases the hydrophobic function of the coating.The silicon-containing coating mainly forms special structures on the surface of the coating by sol-gel method, and silane monomers with a certain length of carbon chain can also be introduced to increase hydrophobicity. Paraffin is a mixture of straight-chain alkanes with 16-30 carbon atoms, which has low surface energy and water will not penetrate into its surface. When the organic coating contains larger hydrocarbon groups, it also has lower surface energy and a certain degree of hydrophobicity.The physical structure of the surface has a great influence on it.The hydrophobic coating on the surface of biological surface is mainly constructed by a special knot.Structurally, nanoparticles are constructed on the surface of particles to obtain micro/nano structure and achieve hydrophobicity. Our company produces all kinds of nano coating, used for car body, car windshield, building wall, textile fabric.Welcome to consult

Solvent selection In the printing ink manufacturing process, considering the overall solvent system of the volatile ladder, improve the printing ink solvent release and reduce printing solvent organic solvent residue, the solvent used is often a mixture of several volatile solvents. In the printing ink manufacturing process, the main organic solvents are toluene butyl ketone cyclohexanone ethyl acetate butyl acetate n-propyl acetate isopropyl alcohol, customers can adjust the volatility of the ink according to seasonal changes. Pigment selection Due to the large difference in the grade of pigments on the market, the performance of dispersive ink stability and other aspects of the same pigment from different manufacturers of the same resin in polyurethane inks often varies greatly, so it is suggested that users choose pigments carefully according to their actual customer needs Selection of auxiliaries Wax powder: the wax powder used in the production of polyurethane ink is often low molecular weight polyethylene wax, the relative molecular weight is generally 1000~6000, has good solubility in the organic solvent of ink, and has good affinity with the polyurethane resin itself, and has good chemical stability Mainly play to increase the friction resistance of the ink film surface, at the same time can appropriately alleviate the anti-viscosity of the ink itself Dispersing agent:A class of surfactants, mainly used for wetting the surface of pigments to shorten the ink manufacturing time, is conducive to the dispersion of pigments, sometimes can appropriately reduce the amount of oil absorption of pigments.In the manufacture of high concentration ink, can reduce the yield value of ink, prevent ink pigment particles agglutination and precipitation has a certain effect. Adhesion promoter: printing inks containing a large number of polar groups, such as BOPP PE nonpolar substrate surface even by corona surface treatment, surface tension in 38 dyne ~ 42 dyne, to improve the polyurethane ink on the substrate surface adhesion fastness, often need to add the appropriate ester titanate coupling agent or chlorinated polypropylene adhesion promoter. We are a manufacturer of acrylic resin for water base inks,welcome customers to inquire.

Glass hydrophobic is a new product in recent years, the product is generally used in automobile glass, to bring hydrophobic performance of the glass when the material is applied to the product, let us know about it. Step 1: Surface treatment  When cleaning and degreasing, special glass cleaners must be used to ensure the success of the coating, to ensure that the hydrophobic nano coating and the substrate surface is easy to clean, forming a complete chemical bond, the surface should be carefully cleaned before use Degree of the combination of hydrophobic nano coating and substrate directly determines the life and scratch resistance of coatings products, use the detergent for cleaning glass, the glass surface with a clean towel or non fiber tissue glass cleaner, repeatedly is wiped, reoccupy clear water is rinsed clean, and then with a clean towel or no fiber paper towel dry, to ensure that no float glass surface clean and dry the blues No grease and other dirt easy to clean, should be used immediately after cleaning Step 2: Surface coating Please note that direct sunlight should be avoided during construction. If the windshield is to be treated, the left and right sides should be treated separately 1. apply a certain amount of hydrophobic nano liquid that is easy to clean on the glass, form a thin liquid film with medical gauze or dust-free cloth, and then wait 20 to 30 seconds, immediately wipe with dry cloth, wipe in the way of drawing circles, until there is no trace on the surface 2. After 6 to 8 hours, the glass surface will show good hydrophobic effect 3. If you feel that the result is not ideal, you can repeat steps 1 and 2, and then do it again 4. For the treatment of automobile windshield, please do not use windshield wipers when handling and drying Our company sells all kinds of products such as nano superhydrophobic on automobile glass, welcome to consult

According to the current development trend of waterborne polyurethane coating, green polyurethane coating technology is mainly divided into two categories: waterborne polyurethane coating and solvent-free polyurethane coating.Among them, solvent-free polyurethane coating mainly contains polyurethane hot melt adhesive coating and light curing polyurethane coating.Waterborne polyurethane (WPU) is a polyurethane system with water as the dispersion medium instead of organic solvent. Compared with the traditional solvent-based polyurethane coating agent, it is environmentally friendly and more safe and reliable in logistics, transportation, production and manufacturing. The actual physical and chemical properties are shown in the figure below. Comparison of waterborne polyurethane and solvent-based polyurethane property Water based polyurethane Solvent-based polyurethane viscosity It is affected by the interparticle force of emulsion particle size It is affected by relative molecular weight, solid content, solvent, etc film-processing ability Film-forming slowly Easy to film toxicity The relative environmental protection Organic solvents are volatile and have a toxic smell solvent resistance Poor water resistance Poor resistance to toluene butanone Difference in solvent polyurethane film link of waterborne polyurethane in the film, the emulsion in water at high temperature evaporation concentration gradually, latex particle formation sedimentary gradually, until the interface disappeared and mutual fusion between latex particles, the final latex particle in thread shaped polyurethane chain close to each other mutual diffusion chain end, the last film, as the chart shows. Difference in solvent polyurethane film link of waterborne polyurethane in the film, the emulsion in water at high temperature evaporation concentration gradually, latex particle formation sedimentary gradually, until the interface disappeared and mutual fusion between latex particles, the final latex particle in thread shaped polyurethane chain close to each other mutual diffusion chain end, the last film, as the chart shows. The stability of waterborne polyurethane emulsion is an important standard in the production, processing and application of products. In order to obtain better emulsion stability, waterborne polyurethane emulsion is generally prepared by self-emulsification method.According to the introduction of hydrophilic groups in polyurethane molecular chain, stable emulsions can be formed without adding emulsifiers, which can obviously improve the phenomenon of large particle size and multiple dispersion of emulsion and the residue and migration of small molecule emulsifiers commonly existing in external emulsification method.However, the widespread existence of hydrophilic groups in the polyurethane chain segment is easy to reduce the color fastness to water and wet friction of waterborne polyurethane coating products.In order to improve the shortcomings of the self-...