Formula and production method of waterproof breathable water-in-water multicolour coating

Abstract

The invention discloses a formula and a production method of waterproof breathable water-in-water multicolour coating. The formula of the waterproof breathable water-in-water multicolour coating comprises the following components in parts by mass: 20-30 parts of protective glue, 32-35 parts of basic paint, 9-11 parts of deionized water, 25-30 parts of elastic silicone acrylic emulsion, 2-2.5 parts of propylene glycol, 1.5-2 parts of a coalescing agent, 0.15-0.25 part of a preservative 1, 0.3-0.5 part of a preservative 2, 0.2-0.3 part of a defoaming agent and 0.2-0.3 part of a thickening agent. According to the invention, the formula comprising the components changes hydrophobicity and breathability of multicolour basic paint, usage amount of the multicolour basic paint is reduced, addition of hydrophilic substances such as an anion wetter and sodium pyrophosphate is avoided, the condition that a bubble is formed as the surface of a colour point is dry and internal moisture is not volatilized after the colour point is sprayed onto a wall surface can be avoided, and waterproof and breathable water-in-water multicolour coating is produced.

Description

Technical field: [0001] The invention relates to the technical field of coatings, in particular to a water-resistant, air-permeable water-in-water multi-color coating formulation and a preparation method thereof. Background technique: [0002] Water-in-water multi-color paint is a multi-phase suspension system in which the small droplets of water-based color latex paint are used as the dispersed phase, and the protective glue solution is used as the continuous phase. In order to realize the "water-in-water" suspension, it is necessary to disperse the small droplets of the water-based glue in the protective glue solution. In this way, the protective glue solution forms a water-insoluble protective layer on the surface of the small droplet. This protective layer can prevent latex droplets from diffusing to the protective glue aqueous solution, and can also prevent the injection droplets from aggregating with each other, and this protective state will continue to the wet film ...

AI Technical Summary

Problems solved by technology

However, the strength of this kind of colored pellets is not high, so it is not suitable for rolling and brushing [2] , and the system stability is poor when the ion content is low

Later, Cervelllati Gianfranco used modified film-forming substances to prepare water-based colorful coatings on the basis of JohnC.Zola. After the improvement, it can be applied to roller coating, but there is still the problem of poor stability when the ion content is low. [3]

In the 1990s, EdoardoRossetti used the reaction of colored colloids and Al ions to prepare colorful paints. By controlling the concentration of Al ions, a large amount of colloidal hard non-hydrating colored precipitates can be obtained, which is suitable for brushing. Easy to sag, so it cannot be used directly on the substrate [4]

[0006] Most of the "water-in-water" products currently on the market still have the following problems: color dot bleeding, post-thickening, color dot hardening and brittleness, instability between batches, poor water (white) resistance, and coating swelling when the temperature is high bubble etc.

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