The application of molecular sieves in coatings is mainly reflected in the following aspects:

1、 Remove moisture and impurities

Molecular sieves have a uniform microporous structure and can effectively remove moisture and impurities from coatings through adsorption. If these moisture and impurities remain in the coating, they may affect the performance of the coating in terms of brushing performance, hardness, glossiness, wear resistance, and other aspects. Therefore, adding molecular sieves can significantly improve the quality and performance of coatings.

2、 Improve the physical properties of coatings

Molecular sieves also help optimize the physical properties of coatings by removing moisture and impurities from them. For example, it can enhance the coating performance, weather resistance, water resistance, corrosion resistance and aging resistance of coatings. These performance improvements enable coatings to maintain better stability and durability over long-term use.

3、 Reduce the generation of bubbles

In specific types of coatings such as polyurea waterproof coatings, molecular sieves also play a role in reducing the generation of bubbles. The main component of polyurea waterproof coating, isocyanate, reacts with water to produce carbon dioxide gas, leading to the formation of bubbles. And molecular sieves can adsorb moisture in coatings, thereby reducing the reaction between isocyanates and water and avoiding the generation of bubbles. In addition, the reaction is exothermic and generates a large amount of heat to accelerate the formation of bubbles. The addition of molecular sieves can alleviate this situation to some extent.

4、 Improve the uniformity and strength of coatings

The addition of molecular sieves can also improve the uniformity and strength of coatings. Its strong adsorption capacity makes the components in the coating more evenly distributed, thereby improving the overall performance of the coating. Meanwhile, molecular sieves can also react with certain components in the coating, further enhancing the strength of the coating.

5、 Application examples

In the production process of polyurea waterproof coatings, molecular sieves are often used as additives to improve the quality stability of the coatings. By adding molecular sieve activated powder as a dehydrating agent to the system before the reaction between isocyanate and polyurea resin, the moisture and impurities in the system can be adsorbed, thereby improving the quality and performance of the coating. In addition, some studies have used graphene modified mesoporous molecular sieves in water swelling waterproof rubber sealing materials to further improve the chemical stability and durability of the materials.

In summary, the application of molecular sieves in coatings has broad prospects and significant value. It can not only improve the quality and performance of coatings, but also optimize the physical properties of coatings and reduce the generation of bubbles. With the continuous advancement of technology and the expansion of application fields, the application of molecular sieves in coatings will become more extensive and in-depth.