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Application of water-based zinc stearate in coatings

wallpapers News 2021-01-12
1. Application of water-based zinc stearate as a waterproofing agent in coatings
Friction will cause material wear. The way to ease friction and wear is lubrication. Adding water-based zinc stearate to the surface coating can reduce the effect of friction coefficient and form a self-lubricating material
When the friction pairs slide against each other, the temperature rise produced changes the properties of the material surface, thereby affecting the friction coefficient and changes with the working conditions of the friction pair. When water-based zinc stearate is heated, it melts from solid to liquid, absorbs a lot of heat, stabilizes the performance of the material surface, and reduces the coefficient of friction.
During the friction process, due to the low shear strength of the lubricating coating film with water-based zinc stearate adhering to the surface of the substrate, it will transfer to the surface of the mating material to form a transfer film, causing friction to occur between the coating film and the transfer film, Thus playing a role in reducing friction. And the lubricating film added with water-based zinc stearate can firmly adhere to the surface of the substrate, and it is not easy to fall off during friction. It can provide a stable and long-lasting specific nanofilm, so that the formation and consumption of the transferred nanofilm are balanced, so The lubrication state is good.
2. Application of water-based zinc stearate as a wear-resistant additive in coatings
The wear resistance of wear-resistant coatings actually refers to the ability of the coating film to resist friction, abrasion, and erosion. It is related to many properties of the coating film, including hardness, scratch resistance, cohesion, tensile strength, elastic mode, and toughness, etc..
The existing commonly used wear-resistant coating films are composed of polyurethane and its modified products, epoxy and its modified products, and organic silicon and its modified products. Although polyurethane elastomer is recognized as a good anti-corrosion material, it has the disadvantages of too low hardness and poor adhesion, and sometimes it cannot give full play to its performance advantages. Epoxy resin has good adhesion and cured ring Oxygen resin coating film has high hardness, but the coating is brittle; silicone has poor wear resistance, which can not meet the needs of practical applications.