lf-804 has strong ability of sterilization and anti-mold, wide range of use, anti-mold effect is obviously better than the traditional anti-mold agent, is the replacement product of traditional polymer materials, diatomaceous earth, interior and exterior wall latex paint, glue, putty powder, diatomaceous earth, cellulose anti-mold.
This product can also be widely used in plastics, building materials, paints, emulsion paints, adhesives, paper, bamboo and wood products. It is suitable for the production of type emulsion paint and powder products against mildew as well as products that need anti-corrosion and mildew.
The contact angle of the system containing the polyacrylate leveling agent is basically the same at all temperatures and at all times, is not affected by the degree of curing, and the contact angle is low; while the system without the leveling agent has a high contact angle and is In the initial stage of the curing reaction, the contact angle increases with the increase in the degree of curing, and then tends to be constant. This is because the leveling agent is the component with the lowest surface tension in the powder coating system, and has a certain incompatibility with the system. It quickly migrates to the surface of the coating film during the melting stage of the powder coating, and adjusts the melting and curing process. The homogenization of the surface tension makes the coating film exhibit a constant surface tension, thereby eliminating the defects caused by the unbalanced surface tension.
The commonly used anti-cratering and leveling agents for powder coatings are acrylic homopolymers and copolymers with medium molecular weight and relatively narrow molecular weight distribution, which have little effect on surface tension. They are mainly used to maintain the coating during the process of melting and solidifying the film. The surface tension of the film is uniform and constant to promote leveling. Some polyacrylate leveling agents micronized amide wax rheology modifier with active groups such as epoxy, hydroxyl, hydroxymethyl, and carboxyl groups, because these active groups have hydrophilicity, improve the wettability of the leveling agent to the substrate.
The anti-cratering function is more obvious; secondly, these groups can cross-link with the resin or curing agent in the system, so that the leveling agent and the system are closely combined through chemical bonds, which improves the mechanical properties and gloss of the coating film, even if the amount is over It will not cause the coating film to become sticky. The fluorine-modified acrylic polymer and the high-temperature-resistant modified polysiloxane have a significant effect on reducing surface tension and are mainly used to prevent shrinkage. For some powder coatings, choosing a suitable polyacrylate leveling agent can achieve good wetting and leveling effects, but for powder coating systems that are difficult to wet, it is necessary to focus on anti-crater flow The best synergistic effect can be achieved when the leveling agent is used in conjunction with the leveling agent that focuses on preventing orange peel.
The ability of polyacrylate leveling agent to control surface defects in epoxy-polyester powder coating system.
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