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Building coating with high rain mark resistance and preparation method thereof

A technology for architectural coatings and rain resistance, applied in the direction of coatings, etc., can solve the problems of poor rain marks, floating color, poor compatibility of water-based coating systems, etc., and achieve the effect of improving the performance of rain marks

Active Publication Date: 2021-12-28
FIRST NEW MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In related technologies, in order to reduce rain marks, exterior wall coating products mainly solve the problem of poor rain marks by selecting highly water-resistant dispersants, low HLB wetting agents and using highly hydrophobic emulsions. This method can be used to a certain extent The phenomenon of rain marks on the external wall can be alleviated, but the choice of hydrophobic dispersant and wetting agent will easily cause poor compatibility of the water-based coating system, and other quality problems such as floating color and blooming; and with the help of the hydrophobicity of the emulsion itself , can not solve the problem of dispersant, wetting agent and other small molecular weight substances precipitated with rainwater, that is, there will still be some rain marks

Method used

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  • Building coating with high rain mark resistance and preparation method thereof
  • Building coating with high rain mark resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A kind of high anti-rain mark architectural coating is prepared by the following method:

[0072] First add emulsion, water, 1 / 2 (weight) defoamer, wetting agent, dispersant, cellulose, PH value regulator, antifreeze into the dispersion tank, stir well under the state of 300-400rpm, and then Add titanium dioxide, calcium carbonate, kaolin and calcium silicate, disperse at 1200-1500rpm for 20 minutes until the fineness is ≤60 microns, then add film-forming aids, 1 / 2 (weight) defoamers, preservatives and polyurethane thickeners The agent is stirred evenly, and the viscosity is adjusted to obtain the coating.

[0073] Among them, the specific surface area of ​​calcium silicate is 300m 2 / g, the oil absorption value is 450ml / 100g. The content of each component is shown in Table 1, and the unit of the content of each component is kg.

Embodiment 2

[0075] The difference from Example 1 is that calcium silicate and calcium silicate are added in different amounts, and the specific amounts are shown in Table 1.

Embodiment 3

[0077] The difference from Example 1 is that the calcium silicate is replaced by sodium aluminosilicate of equal weight, and the specific surface area and oil absorption value of sodium aluminosilicate are equivalent to those of calcium silicate in Example 1. The parameters of specific specific surface area and oil absorption value are shown in Table 2.

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Abstract

The invention relates to the technical field of coatings, and particularly discloses a building coating with high rain mark resistance and a preparation method thereof. The building coating with high rain mark resistance is prepared from, by weight, 30-40% of an emulsion, 29.5-43% of fillers, 3.6-5.2% of auxiliaries and 10-30% of water. Based on 100% by weight of the fillers, 3.75-10.71 wt% of the filler has a specific surface area of 300-500 m<2> / g, and the filler with the specific surface area of 300-500 m<2> / g is the filler with a high specific surface area. The preparation method of the building coating with high rain mark resistance comprises the following step: uniformly mixing the emulsion, the high-specific-surface-area filler, the low-specific-surface-area filler, the auxiliaries and the water. The coating has the effect of improving the rain imprint resistance of the coating under the condition of ensuring the quality of the coating.

Description

technical field [0001] The present application relates to the technical field of coatings, in particular to a high rainmark-resistant architectural coating and a preparation method thereof. Background technique [0002] The bright spot rain mark phenomenon is that hydrophilic substances such as emulsifiers, wetting agents, and dispersants in the paint film migrate to the surface with rain or dew, and when the water is completely evaporated, they accumulate on the paint film and form bright spots. Rain marks in exterior wall coatings mainly appear in high emulsion content and low PVC exterior wall coatings, especially in water-based elastic coatings. Rain marks are a relatively common defect in water-based exterior wall latex paint, which seriously destroys the decorative effect of exterior wall latex paint. [0003] In related technologies, in order to reduce rain marks, exterior wall coating products mainly solve the problem of poor rain marks by selecting highly water-res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D7/61
CPCC09D133/00C09D7/61C08K2003/2241C08K2003/265C08K2201/006C08K3/22C08K3/26C08K3/34C08K3/346
Inventor 詹明佳赵雅文刘东华薛瑞娟
Owner FIRST NEW MATERIAL TECH DEV
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