Preparation method of nano coating

Abstract

The invention provides a preparation method of a nano coating. In the method, nano-composite size is adopted and added with fillers and various auxiliary agents; the mixture is mixed and reacts in a reaction kettle, sheared, emulsified, milled and dispersed in a sand mill, concocted in a paint mixing kettle and filtered in a filter so as to prepare the nano coating. The method comprises the following steps: step 1: concocting nano calcium carbonate size; step 2: preparing nano-composite size; step 3: employing the reaction kettle for mixing and reaction; step 4: employing a high-speed shear emulsifying machine for shearing and emulsifying for 30min; step 5: transferring the size to the sand mill for milling and dispersion for 2-3 times, with 30-50min per times; step 6: transferring the size to the paint mixing kettle to be stirred, adding phenylethylene-propyl ethylene acid ester emulsion, a film forming auxiliary agent and a defoamer while stirring and finally adding propylene glycol and a bactericide; step 7: adjusting the pH value to 8-9; step 8: adding a thickener to ensure the viscosity to be 3000-4000 MPa.S; step 9: adopting a coating filter for filtering and preparing the finished product after filtering. The coating is bactericidal, nontoxic, tasteless and resistant to 300000 times of washing.

Description

technical field [0001] The invention relates to a coating, in particular to a preparation method of a nano coating. Background technique [0002] At present, a large number of wall paints sold on the market in our country contain organic solvents. Although some powder materials are inorganic powders, the material components used contain certain toxic pigments and fillers, which produce certain harmful substances during production and use. Pollution affects human health. [0003] The reason why the paint coating is not resistant to stains, dust, and dirt is mainly determined by the surface structure of the paint and the characteristics of the material. The paints sold on the market are either hydrophobic or oleophobic. The former Good water resistance, but not oil resistance; the latter has good oil resistance, but not water resistance. For this reason, making the amphiphobic structure of the nano coating is very beneficial to people's living requirements. [0004] The scr...

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Problems solved by technology

[0004] The scrub resistance of nano-coatings depends on the surface effect of nano-materials, and it shows scrub resistance on the coating. For ordinary latex paints, the scrub resistance is very low, generally only 1000-2000 times. Therefore, use The number of years is short and cannot meet people's requirements

[0005] General paint coatings do not have strong weather resistance, color retention, gloss retention and aging resistance. Therefore, the service life of the coating is short. Nanomaterials have a strong shielding effect on ultraviolet rays, which can greatly slow down the sunlight on the coating. The destruction of the layer makes the coating have stronger weather resistance, color retention, gloss retention and aging resistance

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