How paints are made How paints are used

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General paint is done in the following steps:

1. Beat and disperse, put solvent or water, additives, and pigments and fillers into the dispersion tank in order for high-speed dispersion for 20-30 minutes.

2. If the process requires sanding to achieve the fineness of use, it will be sanded. After reaching the specified fineness, move on to the next process.

3. In the paint mixing stage, resin or emulsion, defoamer, thickener (need to be diluted according to the product manual or engineer's instructions) and so on are added in turn.

4. Sampling inspection, factory inspection according to different types of products. (Type inspection is also required once a year or when the main raw materials are replaced, so as to ensure product quality).

5. Filter packaging after qualification.

1. Check the wall of the room that needs to be painted with latex paint to see if the wall is solid and smooth, if there are large cracks and holes in the plastering layer of the wall, it should be dealt with in time.

2. Clean the wall surface with a steel brush before brushing latex paint, ensure that the wall is free of floating dust and floating soil, etc., clean up the concrete interface agent on the wall stick, try to ensure uniformity, wait until 2 hours later to see if it is dry, and you can scrape putty after drying.

3. The wall putty can be scraped twice, if the putty with poor flatness needs to be scraped several times, you can also consider scraping the plaster first and then scraping the putty, and the time of each scraping putty should be spaced between more than 2 hours before the next step of construction.

4. After 1 or 2 days after the putty is scraped, the putty grinding should begin, and the grinding time period can be selected at night, illuminate the wall with an electric light bulb, and check whether the wall is smooth while grinding.

5. After the putty is polished, clean up the floating dust on the lower surface, and then you can carry out the construction of the primer, the primer must be painted evenly, and the general brush can be done once, and the next step of construction can be carried out after the primer is dry, and the primer drying time is generally about 2 4 hours, depending on the primer.

6. After the primer is completely dry, start to brush the topcoat, the topcoat should be painted on both sides, and each topcoat painting must wait for the first time to be completely dry.

Look at the instructions, if it is diluted, you can brush it directly.

In the grinding and dispersion stage, water or solvent and various additives are added to the dispersion tank, and after stirring evenly, pigments and fillers are added for mixing and dispersion, and sand grinding is carried out if necessary, so that it can reach its own primary particles, and can maintain long-term stable suspension in the system; In the paint mixing stage, a film-forming substance (base material) is added to the dispersed pigment slurry, which is fully mixed, defoamed, and the viscosity is adjusted. After the product is inspected, it is filtered and packed into storage.

Attention should be paid to the production of paint.

The coating production process is simple and the quality is easy to control, so the quality of the coating mainly lies in the technical content and cost. This problem is more complex, involving different types of coatings, process precautions or critical control points are also different, the basic is:

Cleaning of the working cylinder and the equipment used to avoid pollution; Pay attention to the feeding process, remember to add low viscosity to high viscosity, and do not add it the other way around; Pay attention to the dispersion time and shear forces; Pay attention to the name and quantity of the feeding material to avoid misdelivery; The wetting and dispersion of the effect pigment should be uniform, and it should be inspected before use.

The coating belongs to the organic chemical polymer material, and the coating film formed belongs to the type of polymer compound. According to the classification of modern chemical products, coatings belong to fine chemical products. Modern coatings are gradually becoming a multifunctional engineering material and an important industry in the chemical industry.

The key also depends on what kind of paint you are, let me give you a brief introduction to the production process of latex paint:

The first step: the first thing is to do a good job of the formula and prepare the raw materials, for example, if you produce one ton, then you must calculate the formula list for one ton of production; Check whether the raw materials are complete;

Step 2: Make the face and filler slurry; It is to add water in turn, add the corresponding additives at low speed, and then put in the color and filler (generally add the large amount of oil absorption first), and wash the machine after the powder is added. Then disperse at high speed for about 20 minutes until the fineness is qualified; Of course, if you need a sand machine, I think you only need a medium-speed fractional straight powder with no obvious particles.

Step 3: Paint mixing stage; After the pigment and filler slurry is made, reduce the speed to about 600 rpm, add the emulsion and the corresponding test additives, and finally adjust the pH and viscosity.

Liquid solvent paint.

Colorants: Reins, solvents and pigments--- premixed--- tackified--- ground -- tack -- packaging.

High-gloss varnish: resin, solvent --- mixed --- viscous --- packaging.

Matte varnish: resin, solvent--- mixed --- matting powder, viscous --- packaging.

Paint: main color paste--- auxiliary color paste color pale--- viscosity --- packaging.

Aluminum powder paint: aluminum powder soaking--- resin--- color toning, gloss adjustment--- viscosity --- packaging.

Powder coatings: resins, fillers, pigments, additives--- mixing--- extrusion--- cooling--- crushing--- sieving --- packaging.

The general production process of architectural coatings includes the preparation of base materials, the dispersion and grinding of solid materials such as pigments (fillers), the configuration, filtration, inspection of coatings, product weighing, packaging and other processes, Figure 1 is the production process flow chart of architectural coatings.

For example, the preparation of binders for large and medium-sized paint manufacturers includes the synthesis reaction process of polymers, while small paint manufacturers purchase binders as raw materials or simply modify them. The formulation process of latex coatings is generally higher than the requirements of solvent-based and water-soluble, and there are some differences in the selection of process equipment. A schematic diagram of the relationship between the coating production process and the product is shown in Figure 2.

Generally, latex paint is completed in the following steps:

1. Beat and disperse, and put water, additives, and pigments and fillers into the dispersion tank in order for high-speed dispersion for 20-30 minutes.

2. If the process requires sanding to achieve the fineness of use, it will be sanded. After reaching the specified fineness, move on to the next process.

3. In the painting mixing stage, emulsion, defoamer, thickener (need to be diluted according to the product manual or engineer's instructions) and so on are added in turn.

4. Sampling inspection, factory inspection according to different types of products. (Type inspection is also required once a year or when the main raw materials are replaced, so as to ensure product quality).

5. Filter packaging after qualification.

The process and inspection items of different formulas are also different, so the specific process should be formulated by engineers. The above is just an approximate process.