Paint formulation: how to design primer formulation

Core tip: Generally speaking, the transparent primer with finer particle size has better permeability, penetrating into the wall capillary, with more permeability than barrier When the solid color paint with PVC value of 20% - 30% is applied to the cement mortar wall, its anti efflorescence and anti salting out are mainly reflected by film forming barrier For the formulation design of waterborne transparent primers, the emulsion with good alkali resistance and good water resistance and small particle size is chosen as the film forming material and added with related auxiliaries According to the different requirements of various types of walls, the resin solid content during construction is generally controlled 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 Paint Home News: Generally speaking, the transparent primer with finer particle size has better permeability, penetrating into the wall capillary, with more permeability than barrier When the solid color paint with PVC value of 20% - 30% is applied to the cement mortar wall, its anti efflorescence and anti salting out are mainly reflected by film forming barrier For the formulation design of waterborne transparent primers, the emulsion with good alkali resistance and good water resistance and small particle size is chosen as the film forming material and added with related auxiliaries According to the different requirements of various walls, the solid content of resin in construction is generally controlled at 10% - 25% Too high solid content will affect the workability For the white primer, according to the difference of sealing requirements, the PVC designed by the general formula is about 20% - 40%, and the material with high oil absorption should not be selected in the formula composition as far as possible, but the sheet filler with high diameter thickness ratio or the principle of combining coarse and fine powder can improve the film density and effectively improve the sealing performance of the primer Similarly, the resin used for solvent based transparent primer is generally acrylic resin or epoxy resin mainly polymerized in solution For single component acrylic resin, try to choose the resin with moderate molecular weight, alkali resistance and water resistance Primer, as a matching product of coating, especially the design of its formulation, has not been paid enough attention In the past, there was a misunderstanding in the industry It was thought that it was easy to prepare primer, except for resin, additives, water (or solvent), or diluted coating But in the process of practical application, the requirements of primer are very high In order to make primer meet the requirements of different substrates, primer needs to have some basic performance requirements, and these properties have internal relations with each other To achieve a certain balance, we need to work hard on the design of formula 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,