Coating knowledge: analysis of the problems of multi-color coating delamination, color penetration, caking and lusterless color particles

The key points are as follows: 1 The floating layer of multicolor coating should be controlled according to the specific gravity of enamel (dispersion phase) and protective glue solution (dispersion medium) and the difference between them This specific gravity difference has a suitable range, too large or too small will affect the stability of the coating According to experience, the specific gravity of enamel is generally controlled between d = 1.010-1.020, and that of protective glue is controlled between d = 1.003-1.006 The main problem of color penetration and turbidity of dispersion medium is to change the concentration of non solvent to control The concentration of non solvent is low, the color particles are small, the coating is very soft, and it is stored Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: 1 the floating layer problem of multicolor paint should be controlled according to the specific gravity of enamel (dispersion phase) and protective glue solution (dispersion medium) and the difference between them This specific gravity difference has a suitable range, too large or too small will affect the stability of the coating According to experience, the specific gravity of enamel is generally controlled between d = 1.010-1.020, and that of protective glue is controlled between d = 1.003-1.006 The main problem of color penetration and turbidity of dispersion medium is to change the concentration of non solvent to control When the concentration of non solvent is low, the color particles are small, the coating is very soft, and the storage stability is poor, the phenomenon of color penetration and dispersion medium turbidity will occur; However, the concentration of non solvent should not be too high At this time, the color drops will peel off, the spray film is uneven and obvious, and the hand feel is rough Therefore, the non solvent should be adjusted to a suitable concentration to improve the coating of color particles and overcome the phenomenon of color penetration and turbidity 3 The main problem of flocculation and agglomeration of dispersing medium is to control the acid value of the coating For the coating with active pigment in the ratio, it is generally suitable to control the acid value at 6-12koh / g, and other problems should also be strictly controlled according to the standard 4 The problem of dull luster of color particles should be adjusted from the following aspects: 1 Change cellulose thickener; 2 Reduce the amount of defoamer or change the type of defoamer; 3 Change the type of pigment and pay attention to the adjustment of pH 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,