Coating raw material selection: resin and pigment selection

Most coatings are made up of raw materials for coatings such as substations (one or more resin mixtures), pigments (including body pigments and functional pigments), solvents, and small amounts of additives. In coating production, after selecting the various coating raw materials necessary for coating components, the next step is how to make rational use of the technical and economic performance of coating raw materials to produce high-quality coatings., it is well known that the selection of various coating raw materials has a great impact on the performance of coatings
the
. Improper selection of one ingredient can result in the failure of the entire coating formulation. Therefore, in the overall composition of coating formulations, in addition to taking full account of the role of each ingredient, there are considerations between the various ingredients of the matching and synergy. The volume concentration of the pigment must also be taken into account after the appropriate part has been selected. In addition, the effect of solvent on coating construction process and coating performance, as well as the role of solvent in controlling the fluidity, viscosity and drying time of coatings, are the correct choice of coating raw materials and the overall raw material formulation design must be considered.is the most used resin in coating production, its raw materials are easy to get, simple manufacturing process. Aolic acid resin contains a lot of ester base, so the modified road is very wide. Polyamide modified alicic acid resin can be used to make tentacle paint, and amino resin can be used as a perfect coating raw material for coils and home appliance coatings.varnishes do not require pigment ratios. However, paint must be pigmented to increase color and mulch. The varnish is colorless, transparent and has no mulch, so the color and cover paint has the highest proportion of paint varieties. Pigments are one of the most important coating raw materials for color paint.pigments should focus on color, masking and coloring properties before they are added as raw materials for coatings. Color is the color that paint products need to achieve, in the paint production master plan clearly, when selecting pigments correctly, pigment coverage is related to its refractive index, crystallization type and particle size. Of the known pigments, the redstone Type TiO2 has the largest refractive index and the largest difference in refractive index between it and the polymer, making it the white pigment with the best masking force. Pigment cover depends not only on the amount of light scattered by the coating, but also on the absorption capacity of the light shining on it. Carbon black, for example, does not reflect light at all, but absorbs all the light that shines on it, so it has the strongest cover. In addition, the particle size of the pigment also has a direct impact on the covering force,pigment coloring force, is the most easily confused with the pigment cover force concept. The similarity between the coloring force and the covering force is that the pigment absorbs and scatters the light, the difference is that the covering force is biased towards scattering and the coloring force is biased towards absorption. It can be said that the stronger the pigment absorption performance, the higher its coloring force. The greater the pigment coloring force, the less it can be used, so the choice of pigment coloring force is related to the ability to reduce the cost of coating production.