In coating construction, the general coating viscosity has construction viscosity and original viscosity. The original viscosity and construction viscosity of the coating change with the temperature rise and fall, so it can only be measured under the same temperature condition. The coating construction methods are diversified, including brushing, scraping, roller coating, spraying, curtain coating, dipping, etc. The viscosity required for each construction method is different, and in most cases, the matching solvent is used to dilute to achieve the required viscosity At this time, the appropriate amount of thinner is directly related to the construction quality.
The choice and amount of solvent in solvent-based coatings have a great impact on the viscosity and film properties of the coating. It is extremely important for the production, storage and construction of the coating. The appropriate choice of solvents when making paint is also partly reflected in the viscosity of the paint. When the proportions of the components in the solvent are balanced, the coating has a certain suitable viscosity, but when the proportion of thinner or cosolvent is high, the viscosity of the paint solution will be significantly increased, and even the coating will suddenly thicken and lose fluidity, thereby affecting Production, construction and paint film quality.