Paint classification: thixotropic agent

Core tip: thixotropic product brief introduction thixotropic agent is a kind of additive which can make the liquid resin matrix (or gel coat resin) become a better fluidity additive When the external force is removed, such as when the stirring or shearing is interrupted, the thixotropic agent will return to the original state which is not easy to flow The function of thixotropic agent is to prevent the resin from flowing on the inclined or vertical surface of construction and avoid the uneven resin content in the upper and lower layers, so as to ensure the quality of products The commonly used thixotropic agents are fumed silica and precipitated silica Other thixotropic agents include asbestos, kaolin, attapulgite, emulsion chloroethylene compound, etc Product picture production 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 Home of coatings: thixotropic agent is a kind of additive which can make the liquid resin matrix (or gel coat resin) become a better fluidity additive When the external force is removed, such as stirring or shearing interruption, the thixotropic agent will return to the original state which is not easy to flow The function of thixotropic agent is to prevent the resin from flowing on the inclined or vertical surface of construction and avoid the uneven resin content in the upper and lower layers, so as to ensure the quality of products The commonly used thixotropic agents are fumed silica and precipitated silica Other thixotropic agents include asbestos, kaolin, attapulgite, emulsion chloroethylene compound, etc Thixotropic agent: the substance added into the resin, which can make the resin glue liquid have high consistency when it is still, and become low consistency fluid under the action of external force At present, there are four kinds commonly used: fumed silica, organobentonite, hydrogenated castor oil and polyamide wax However, these four kinds have great differences in use, and their influence on the thixotropy of paint is in order of polyamide wax, silica, Organobentonite and hydrogenated castor oil Fumed silica was first developed by Degussa company and has been in the leading position up to now Organic bentonite and hydrogenated castor oil can mostly be produced Polyamide wax is led by Hemingway in foreign countries and mainly developed and produced by meitexiang technology company in China, especially MT plus polyamide wax powder and MT st modified polyamide wax powder, which are only one in China In dry mixed mortar and paste mortar, the function of yield point is mainly to improve the stability and storage resistance The formation of yield point can improve the stability of mortar, that is to say, it can overcome the negative effects of mortar sagging or unity during construction The formation of yield point can also significantly improve the storage resistance of paste mortar and the precipitation resistance of self leveling system It can prevent the precipitation of additives and pigments, and inhibit the color penetration and bleeding When the mortar is being pumped, mixed or scratched, a slight increase in shear force is sufficient to overcome the yield point As a result, silicate flakes play the role of lubricant, reduce the relative viscosity and improve the workability of mortar Thixotropic principle of silica thixotropic is an important performance of liquid system, which directly affects the appearance, construction performance and storage stability of liquid system, and different liquid systems have different requirements for thixotropic agents For oily systems, most of the thixotropic agents work by forming hydrogen bonds There are many untreated silica aggregates on the surface, among them, one is isolated and undisturbed freedom, the other is linked to form hydrogen bond, which is easy to form three-dimensional network structure in oily system This structure is subject to mechanical When the shear stress is removed, the three-dimensional structure will recover the viscosity and increase In the completely non-polar liquid, the recovery time of viscosity is only a fraction of a second; in the polar liquid, the recovery time is longer, which depends on the concentration and dispersion of fumed silica This characteristic endows the oily liquid system with very good storage and construction performance, especially the thick slurry liquid system, which can not only ensure the good flow of the liquid system under a certain construction shear force In general, during the construction process, due to the fast volatilization of the solvent at the edge of the coating, the surface tension is uneven and it is easy to make the liquid move to the edge, while the silica network can effectively prevent the liquid from moving to form a thick edge, and at the same time, it can prevent the liquid from flowing and hanging during the curing process, so as to make the coating uniform At the same time, fumed silica can form hydrogen bond and improve the shear viscosity in the system, so it plays a thickening role Therefore, fumed silica is widely used in oily system 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,