Why can't the standard formula for paint production be directly formulated into abrasive paint slurry?

Although the standard formula determines the final composition of the color paint product, it cannot be directly used to prepare the ground paint base. This is determined for the following two reasons. One is that in the production of colored paints, depending on the scale of production and the size of the equipment used, it is always necessary to increase the amount of material in the actual operation batch by a certain multiple on the basis of the standard formula. The second is because in the production of colored paints, in order to disperse the pigments to the required fineness in the shortest time, in addition to selecting good pigments and effective grinding equipment and other conditions, the processing method must also be considered.

A millbase with a high pigment content is much more efficiently ground on the same Grinder than a millbase with a low pigment content. This is because the pigment content in the grinding mill base is relatively high (or called rich pigment composition), then a larger amount of other components (paint, solvent, etc.) can be added to the mill base with qualified fineness to obtain a larger quantity Many paint products. Therefore, in the production of color paints, all the pigments, part of the paint, part of the solvent and the additives (such as dispersants, wetting agents, anti-sedimentation, etc.) Grinding and dispersing to obtain a grinding mill slurry, and then adding the remaining paint, solvent and additives (such as drier, anti-skinning agent) to the qualified grinding mill slurry in the paint mixing stage , leveling agent, etc. are mixed evenly to prepare colored paint products.

That is to say, in the production of colored paints, it is necessary to first increase the amount of materials added by a certain multiple according to the standard formula to make it meet the needs of the size of the equipment. There are two parts, the type and quantity of materials added in the stage of toning and lacquer preparation. Under the premise of ensuring the ratio of various raw materials stipulated in the standard formula, the formula formed by expanding the amount of material in proportion and dividing the material into two parts: grinding paint slurry feeding and color mixing paint feeding is what we are talking about. Process formula or production formula. Only the process formula is an instructional technical document directly used in the production of color paints.

The process formula design, that is, the basis for the quantitative distribution of the raw materials into two parts, the grinding mill base feeding and the color mixing paint feeding, is to first determine the composition of the grinding mill base (that is, the appropriate amount of pigments, solid resins and solvents in the grinding mill base). Proportion), the determination of the composition is equivalent to determining the amount of ground paint slurry, and the rest of the amount of addition in the total amount has naturally become the amount of addition of toning paint.

The composition of grinding varnish varies with different pigments, different grinding and dispersing equipment and different grinding and pulping methods. In addition, the depolymerization of pigments with a reasonable composition of grinding varnish is an important factor to improve the grinding efficiency of colored paint production. Therefore, the research on the reasonable composition of millbase has become an important topic for coating scientists for a long time. And producing with reasonable grinding mill pulp has just become an important way to save energy and improve labor productivity.