Preparation method of coating paint film containing modified silica sol

Abstract

The invention discloses a preparation method of a coating paint film containing modified silica sol. The preparation method comprises the following procedures: (1) adding toluene diisocynate and the like into a first reaction kettle, so as to obtain a primary product; (2) adding dimethylolpropionic acid and the like into the primary product, so as to obtain an aromatic waterborne polyurethane emulsion; (3) preparing modified silica sol; (4) adding the modified silica sol and the aromatic waterborne polyurethane emulsion into a third reaction kettle, so as to obtain a mixed emulsion; (5) adding a proper amount of acrylic copolymer sylvite and the like into the fourth reaction kettle containing distilled water, so as to obtain a mixed base solution; (6) adding the mixed emulsion into the mixed base solution, so as to obtain a coating containing the modified silica gel; (7) carrying out air-drying on a plastic film, and diluting the coating containing the modified silica gel; and (8) spraying the coating containing the modified silica gel to the plastic film, so as to obtain the coating paint film containing the modified silica sol. The paint film prepared by virtue of the preparation method can be used for conveniently testing the properties such as tensile property, corrosion resistance, vapor permeability and peel strength of the coating containing the modified silica sol.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a method for preparing a paint coating film containing modified silica sol. Background technique [0002] In order to prevent the materials or semi-products exposed to the atmosphere from being polluted, corroded and damaged, and prolong their service life, they are usually coated with good protective and peelable coatings on their surfaces for effective and temporary maintenance. Archive protection. In this way, it can not only isolate the invasion of air, salt spray, and microorganisms from the outside to achieve anti-corrosion effect; but also achieve the effect of cleaning and decontamination by adsorbing pollutants. Compared with solvent-based protective coatings, water-based protective coatings are safer and more environmentally friendly, so they are widely used in the field of product packaging and decoration. However, the existing water-based protective coatings...

AI Technical Summary

Problems solved by technology

However, the existing water-based protective coatings still have the disadvantages of low film strength, poor peelability and single protective performance.