Water-based organic silicon high-temperature-resistant coating and preparation method thereof

Abstract

The invention relates to a water-based organic silicon high-temperature-resistant coating and a preparation method thereof, wherein the water-based organic silicon high-temperature-resistant coating comprises the following components in percentage by mass: 40.0-50.0% of water-based organic silicon resin, 0.8-1.5% of a dispersing agent, 0.5-1.0% of a wetting agent, 0.7-1.0% of a defoaming agent, 0.2-0.6% of a rheological additive, 9.0-17.0% of a high-temperature-resistant filler, 9.0-13.0% of a high-temperature-resistant pigment, 3.0-6.0% of an anti-rust pigment, 0.3-0.6% of a composite drier, 0.2-1.5% of a flash rust resisting agent, and 15.0-20.0% of deionized water, wherein the water-based organic silicon resin is formed by mixing DOWSIL 8016 and 3141 according to the mass ratio of (7-9):1. The preparation method comprises the steps: sequentially adding the dispersing agent BYK-190, the wetting agent, the defoaming agent and the rheological additive into the deionized water, uniformly stirring, dispersing at a high speed, adding the water-based organic silicon resin, dispersing at a high speed, stirring at a low speed, adding the drier and the anti-flash-rust agent, and uniformly dispersing at a medium speed to obtain the coating. The water-based organic silicon high-temperature-resistant coating does not contain a cosolvent, the VOC content is less than 20 g / L, and the water-based organic silicon high-temperature-resistant coating is environmentally friendly and excellent in high temperature resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based organosilicon high temperature resistant coating and a preparation method thereof. Background technique [0002] The country's environmental protection requirements are becoming increasingly strict. With the release of VOC (volatile organic compound) emission standards, solvent-based coatings can no longer meet policy and market requirements. Enterprises' awareness of environmental protection is constantly improving. Green environmental protection coatings have become the development trend of the coatings industry. . Among them, water-based coatings have developed rapidly in the fields of wood coatings, containers, construction machinery and steel structures, and have been vigorously promoted and applied. However, the existing water-based silicone high-temperature resistant coatings are still limited in high-temperature resistance, and are only suitable for enviro...

AI Technical Summary

Problems solved by technology

However, the existing water-based silicone high-temperature resistant coatings are still limited in high-temperature resistance, and are only suitable for environments below 400°C, and cannot be used for a long time at higher temperatures. Solvent-based silicone coatings are still used in high-temperature protection fields, and the widespread use of solvent-based silicone coatings still does not meet environmental protection and market requirements. It is necessary to develop water-based silicone high-temperature resistant coatings that can withstand above 400°C to replace existing high-temperature protection applications. Solventborne Silicone Coatings for the Field

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