Thermosetting coatings are a type of coating widely used in the field of raw materials for the production of chemicals, and their manufacturing method involves a number of links and technologies. In this article, the manufacturing method of thermosetting coatings will be introduced in detail, including raw material preparation, mixing and stirring, grinding and dispersing, adjusting pH value, packaging and storage steps.
I. Preparation of raw materials
The manufacture of thermosetting coatings requires the preparation of a variety of raw materials, mainly including resins, pigments, fillers, solvents and additives. Among them, resin is the main film-forming material of the coating, pigment is used to give the coating color and covering power, filler is used to improve the mechanical properties of the coating and filler, solvent is used to regulate the construction performance of the coating and the drying speed, and additives are used to improve the leveling, anti-sinking, anti-sagging and other properties of the coating. Mixing and stirring
The prepared raw materials will be added into the mixing tank according to a certain proportion, and the high-speed mixing equipment will be used to mix the various raw materials well. During the mixing process, attention should be paid to controlling the mixing speed and time to avoid excessive mixing or uneven mixing.
Third, grinding and dispersing
Thermosetting coatings in the pigment and filler particles are large, need to be milled and dispersed in order to be fully dispersed in the resin. Grinding and dispersing can be carried out by sand mill, ball mill or three-roller machine, etc., to grind the pigment and filler particles to a certain fineness and make them evenly dispersed in the resin.
Four, adjust pH value
Thermosetting coating pH value has an important influence on its construction performance and drying speed, so it is necessary to adjust pH value according to the specific requirements of the coating. Generally, acidic or alkaline substances are used for adjustment, and attention should be paid to control the stable range of pH value at the same time.
V. Packaging and storage
manufactured thermosetting coatings need to be packaged and stored to ensure its quality and stability. Packaging generally use iron drums, plastic drums or cartons and other containers, storage needs to pay attention to avoid direct sunlight and high temperature environment, and need to be regularly checked and maintained.
The above is the general method of thermosetting coatings manufacturing, the specific manufacturing process also needs to be properly adjusted and optimized according to the type of product and requirements. At the same time, in order to ensure the quality and performance of thermosetting coatings, it is also necessary to pay attention to the following points:
1. Strictly control the quality and proportion of raw materials to ensure that the various indicators of the coatings meet the requirements;
2. In the process of mixing and mixing and grinding and dispersing, it is necessary to maintain the cleanliness and sealing of the equipment, to avoid the emergence of impurities and contamination;
3. Adjustment of the pH value needs to pay attention to the control of regulator dosage and joining speed to avoid over-regulation or regulation of the speed. Avoid over-adjustment or uneven adjustment;
4. Packaging and storage need to choose the right container and storage conditions to avoid leakage and deterioration and other problems. In conclusion, the manufacture of thermosetting coatings needs to strictly control the process parameters and quality indexes of each link to ensure that the quality and performance of coatings meet the requirements. At the same time, it is also necessary to continue to explore and improve the manufacturing process, improve production efficiency and quality stability, and contribute to the development of the field of raw materials for the production of chemicals.
