Common knowledge of coatings: hydrophobic modifier and compatibility with emulsion to prepare high resistance coatings

It is pointed out that with the improvement of people's awareness of environmental protection, it is the general trend to use water instead of solvent to prepare polymer liquid coatings But in the process of water-based transformation, more attention should be paid to the characteristics of water, so that it can better serve the coating industry This paper will mainly discuss the amphiphilic balance of surfactant in waterborne coatings and its influence on the formulation Water is characterized by high surface tension and low viscosity Although water will not pollute the atmosphere when evaporated, it needs to be used together with surfactant Most of the additives for waterborne coatings are surfactants and their derivatives, which may affect the soil and water source all Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Home of coatings news: with the improvement of people's awareness of environmental protection, it is the general trend to prepare polymer liquid coatings with water instead of solvent But in the process of water-based transformation, more attention should be paid to the characteristics of water, so that it can better serve the coating industry This paper will mainly discuss the amphiphilic balance of surfactant in waterborne coatings and its influence on the formulation Water is characterized by high surface tension and low viscosity Although water will not pollute the atmosphere when evaporated, it needs to be used together with surfactant Most of the additives for waterborne coatings are surfactants and their derivatives, which may affect the soil and water source Reducing the water content in the formula as much as possible helps to reduce the total amount of surfactant, is conducive to environmental protection, and also helps to balance the two parents of the formula Waterborne coatings must be water-resistant, but all film-forming substances need to be dispersed in the water phase This involves the screening and balancing of surfactants The problems in the preparation, storage and construction of the coating, even in the process of dehydration and film formation, and even the resistance of the dried coating are related to the added surfactant auxiliary 1) The molecular weight of acrylic acid, alkyd, nitro and other high molecular resins is higher, but the viscosity is higher, so a lot of diluents are needed 2) waterborne macromolecule resin is mainly emulsion or dispersive 3) in order to improve the volume and viscosity of the resin and reduce viscosity as much as possible, the two component cross-linked low molecular weight resin has been widely applied in coatings Such as epoxy, polyurethane, UV coating, etc There are common problems in the coatings prepared by the above resins, that is, there is only physical action between the resins and inorganic fillers and various pigments, and there is reaction between the two-component resins But there is no chemical reaction with other components The single component baking paint forms film when baking at high temperature, but there is no significant relationship between inorganic matters at this time In water-based coatings, when dehydrated, various particles gather and form a film, but they only adhere to each other * the pigment volume concentration PVC can reduce the resin volume fraction and increase the inorganic volume fraction by increasing PVC; the inorganic slurry with high solid and low viscosity can be prepared by proper wetting / dispersing agent * volume solid content: reduce the volume fraction of cosolvent and water, select the appropriate associating thickening rheological system * assist with the appropriate defoamer, substrate wetting agent, and the miscibility between resin and inorganic substance: the cross-linking between coupling resin between organic / inorganic substance / substrate and the cross-linking between resin and surface active treatment agent of inorganic substance * High volume solid content, low viscosity, no stratification, good storage stability and workability are the basic requirements for formula design * the water-resistant coating should be water-resistant after film-forming, and the water reducing formula is the center of gravity, so the total amount of hydrophilic surfactant can be reduced only by reducing * hydrophobic modified dispersant and rheological agent are the key links in the preparation of high solid and low viscosity water system 1) The interaction and equilibrium principle of dispersant and associated rheologic agent, hydrophobic modification and amphiphilic balance must be considered to meet the storage stability, constructability and film resistance 2) The properties and action mechanism of polyurethane / polyether rheological agent are aimed at the particles in the formula, which eventually form the coating How to make the properties of particles meet the requirements of association needs to follow the principle of hydrophobic modification Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,