Coating formula: design principle of diatom mud formula

Core tip: the formulation design of diatom mud should fully consider the requirements of construction, use, decoration, environmental protection and health as decoration materials Select raw materials according to the requirements and determine the proportion In the design of proportioning, all kinds of performance should be taken into account The formulation of diatom mud is basically in line with the design principle of inorganic powder wall decoration coating The formulation design of diatom mud should include four parts: cementitious material (or binding material), diatomite material, other pigments and fillers and appropriate additives (1) Selection of common cementitious materials Diatom mud as wall decoration coating material should be guaranteed first Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Coating House News: the formulation design of diatom mud should fully consider the requirements of construction, use, decoration, environmental protection and health as decoration materials Select raw materials according to the requirements and determine the proportion In the design of proportioning, all kinds of performance should be taken into account The formulation of diatom mud is basically in line with the design principle of inorganic powder wall decoration coating The formulation design of diatom mud should include four parts: cementitious material (or binding material), diatomite material, other pigments and fillers and appropriate additives (1) In order to "get on the wall", it is necessary to choose diatom mud as wall decoration coating material for common cementitious materials In latex coating, the binding material or film-forming material is polymer resin; in diatom mud products, the binding material is inorganic cementitious material, including lime, white cement, gypsum or other active mineral materials, etc Choosing lime or white cement as bonding material has the characteristics of forming alkaline environment and environmental protection, but we should pay attention to the problems of long time of complete hardening, easy cracking, short construction window, etc., which can be solved by adding appropriate additives White cement is a kind of hydraulic material, which is formed by forming stable silicate through hydration reaction Its hydration reaction is completely hardened, and the maximum strength should be over 28 days It has the advantages of environmental protection, anti bacteria and anti mildew Lime is a kind of pneumatic cementitious material, which is hardened by absorbing carbon dioxide and water vapor in the air It will take some time to fully harden The utility model has the advantages that the carbon dioxide in the air can be absorbed in a certain period of time, which is beneficial to the improvement of the indoor environment; the strong alkalinity of the utility model is also beneficial to the antibacterial and mildew proof properties of the decoration layer Gypsum is a kind of air hardening cementitious material, which absorbs moisture in the air and hardens Anhydrous gypsum and hemihydrate gypsum form dihydrate gypsum in absorbing water crystallization, dihydrate gypsum forms needle like crystal body, which is porous after cementation molding, and has good humidity regulation function The performance of the wall decoration materials made of diatom mud with different cementitious materials will be different At present, the enterprises with better market brands mostly choose high-quality lime and high-quality white cement as cementitious materials (2) The main characteristic of diatomite material diatomite mud decorative wall material comes from diatomite Because there are a lot of diatomaceous earth in the wall material of diatomaceous mud decoration, its surface and interior are rich in micropores, which makes it have the function of humidity regulation and air purification The selection of diatomite is very important in the design of diatomite mud formula Of course, there are many porous mineral materials, diatomite is only one of them, and because of its excellent comprehensive performance, it has been selected as one of the main functional materials for wall material formula design Diatomite is a kind of biogenic siliceous sedimentary rock, which is mainly composed of ancient diatom remains Its chemical composition is mainly SiO2, containing a small amount of Al2O3, Fe2O3, Cao, MgO, K2O, Na2O, P2O5 and organic matter Diatoms in diatomite have many different shapes, such as disc, needle, tube, feather and so on The loose density is 0.3g/cm3 ~ 0.5g/cm3, the porosity is 80% ~ 90%, it can absorb 1.5 ~ 4 times of its own weight of water, and it is a bad conductor of heat, electricity and sound When choosing diatomite, we should pay attention to its whiteness, density and pore size distribution Diatomite generally needs to be processed after mining The purpose of diatomite beneficiation is to remove mud, debris, iron, aluminum and other impurities, so as to enrich diatom Generally, gravity beneficiation method is adopted, which is divided into dry and wet beneficiation methods Dry separation uses air separator to remove gangue, or rotary dryer to remove organic matter, volatile matter and moisture, which is mainly used for high-grade ore; wet separation uses hydrocyclone to remove gangue impurities with high density, which is mainly used for low-grade ore In general, the processing flow of diatomite beneficiation is: raw ore, grinding and drying in the first stage, grinding and drying in the second stage, pre separation, hydrocyclone separation and powder products If further processing is required, it shall be sent to rotary kiln for calcination (with or without flux), grinding and cooling, separation and classification - filler level or filter aid level products The natural diatomite can also be used for chemical impurity removal by sulfuric acid and hydrochloric acid, but the cost is high and the waste liquid needs to be treated to prevent environmental pollution After removing impurities and some metals, natural diatomite is sintered at high temperature by adding sodium carbonate and sodium chloride Part of amorphous silicon on the surface generates sodium metasilicate, iron oxide generates sodium silicate iron complex salt, and aluminum oxide generates sodium metasilicate In addition to the role of reaming, it also plays a role in color change However, there is no detailed report on the changes of nano channels before and after sintering Diatomite with developed micropore diameter of 3nm ~ 6nm is more suitable for wall material Such pore diameter is conducive to the adsorption and release of water molecules and the adsorption of harmful substances such as formaldehyde (3) In the formulation of diatomite wall materials, diatomite is an important component and functional filler According to the requirements of application performance and construction performance of coating materials, in addition to cementitious materials and diatom materials, other fillers should be added to adjust the performance of diatom mud Commonly used fillers include other mineral fillers with appropriate fineness, such as lime calcium powder, fine colored sand, quartz sand, etc These fillers should be added properly according to the texture of the design and color, which can not affect the other properties of diatom mud, such as touch, humidity regulation, adsorption and purification, etc The fineness of the filler shall be determined according to the texture requirements of the coating pattern In order to meet the requirements of vision, a proper amount of powder pigment should be added according to the different needs of color texture The selection of pigment should pay attention to its environmental protection, heavy metal should not exceed the standard, color stability, etc The pigment should be evenly dispersed in diatom mud, and the coordination with other materials should be reasonable, so as to prevent the problems of uneven color, alkali return, and blooming (4) In the formulation design of diatom mud, it is necessary to add some other additives according to the different formulations In the formula of diatom mud, if the hydraulic cementitious material is used, the coating is thin, the base course is not closed and easy to absorb water, the water in the coating will be lost quickly, the cement cannot be hydrated and lose its strength, resulting in pulverization In order to ensure the construction performance and extend the construction window period of materials, it is also necessary to add a proper amount of retarder, water retaining agent materials, etc In the formulation design of diatom mud, inorganic cementitious materials are required, but in order to adjust some properties of the coating, it is normal to add appropriate organic additives The addition amount shall be controlled to prevent adverse effects on the mildew resistance and environmental protection of the coating Diatom mud has the function of humidity regulation, which can store water molecules and affect the antibacterial and mildew resistance of materials In the formulation design, it is necessary to add proper amount of anti mildew materials 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,