The color gel coat is actually unsaturated polyester resin. Its production process is mainly batch production. The high temperature reaction occurs under the protection of the color gel coat inert gas. The resulting polyester is filled with diluent and polymerization inhibitor In the kettle, and mixed at a certain temperature, a viscous liquid unsaturated polyester resin is prepared. Of course, the production of gel coat on FRP also has specific process requirements.
Color gel coat is different from mold gel coat.
The mold gel coat resin is a surface coating that gives the composite a beautiful layer on the surface of the product, which is resistant to chemical attack, scratches, and aging. Therefore, it is critical to select high-quality mold gel coat resin and correct application process. Since Cobb's gel coat resin makes the products have high gloss, good weather resistance and wear resistance, and other different properties and excellent manufacturability, it naturally becomes the first choice for many FRP manufacturers. In Futian color gel coat resin formula, special unsaturated resin is used as matrix. High-quality imported color paste and imported additives such as aging resistance, easy defoaming and high thixotropy are adopted. Therefore, the gel coat exhibits high surface gloss, high surface hardness, high strength and resistance.
Color gel coat should pay attention to the following issues:
The degree of deflocculation of pigment particles by the color gel coat determines the size and stability of the color paste dispersion. Generally speaking, it is impossible to achieve complete deflocculation. It is only uniformly distributed in the system in the form of agglomerates of pigment particles. A good color paste has a relatively high degree of deflocculation, that is to say, the agglomerates are as small as possible, so as to ensure good color strength, excellent color development and storage stability. Due to the poor dispersion of the color paste, the difference in mobility between the pigment flocs in the color gel coat and the white pigments and filler particles in the base material is relatively easy to manifest. Due to the slight difference in temperature, density and surface tension inside the paint film, the pigment floc and the paint base naturally participate in this movement, and the pigment floc separates, resulting in floating color and blooming. If the dispersion of the color paste is good, the occurrence of floating color and flowering can be avoided. The dispersion of the color gel coat itself is good, if it is not the same, it will directly affect the product