What are the precautions for the use of paint slurry?

China Paint Online News Information
What do we say about paint slurry, most of which is water-based color paste, so what exactly is color paste? Color paste is a pigment or pigment filler scattered in the paint to form a semi-finished product, and in the paint slurry formula, is unique, the process of use, but also in accordance with the process of use. Now that you know what paint slurry is, let's trust that other information about the slurry, especially in the process of use, some precautions must be understood.
color paste is actually and literally meaning in general, is a pigment slurry. It is the use of different pigments, through a series of pigment treatment, and finally after rigorous processing developed. However, according to the solvent used in the production of color paste, the slurry can be divided into three categories, water-based color paste, oily color paste, water-oil general-purpose slurry, etc.
the difference between the paste and traditional coatings is that the traditional coating coloring method is to use pigment powder directly into the coating, and even some paint manufacturers make their own simple pigment into slurry, and then color the coating treatment. There are great drawbacks to this: the color of the paint will be very unnatural, coloring will appear uneven, and because there is no professional technology and technology, pigment particles are relatively large, coloring force is very weak, will have a certain impact on human health. With the increasingly fierce competition in the market, people's pursuit of high-end products more and more high, color pulp manufacturers followed, initially in the country there are one or two, and later became the mainstream of the industry.
the formulation of water-based slurry is not complicated as follows, but there are a few things to note, because the surface of water is too high, so water-based coatings than ordinary coatings are more prone to bubbles. Bubbles occur mainly because the active molecules on the surface come into contact. These surfactant molecular layers are generally distributed steadily in a dispersed air-satiety pattern and are not easily destroyed. If bubbles are brought in during construction, they are also prone to bubbles on rough substrate surfaces, and these factors must be considered when making color pastes. If you want to achieve the desired deblistering effect, then the debug agent must have a low surface pressure, and can not be dissolved in the foaming liquid, should be very fine particles evenly divided in the foaming liquid. After many experimental screening, we can choose the defoamer generally BYK-024BYK 1028 and Foamex810, these defoaming agent effect is very ideal, there are not too many defects. Mineral oil deblisters are not recommended because they have an effect on the gloss of the coating film.
precautions for the use of water- and water - based
formula. Effect of the acidity and alkalinity of the wall substrate on color preservation
1, the ideal pH value to maintain the stability of the water-based slurry is 6. Between 5 and 10.
2, before brushing color latex paint to pay special attention to the construction of painted wall alkaline strong or weak, alkaline too strong color easy to fade, the most obvious phenomenon is the wall alkali, bite color, white.
3, when conditions should be treated with the coating wall for alkaline strong and weak testing, such as alkaline too strong should first deal with the wall, so that the construction wall PH<10 (treatment method: with 5 to 10% of the herbic acid solution cleaning).
4, the construction wall must be clean and dry, oil-free, no shell, peeling phenomenon, water content is less than 10%, the construction site ambient temperature of more than 8 degrees C, the relative temperature is less than 85%. Make sure that the outer wall color preservation of the color paste formula
two. Color paste addition description
in the design of color formulation, should try to choose weather resistance, good light resistance of the color paste. Inor general color paste, weather resistance, light resistance is better, and cheap, but brightness is not high, can not modulation high saturation color. Organic pigment color paste, bright color, high coloring force, whether in the deployment of dark or light colors, have a high saturation, light resistance, weather resistance is also good. If the two can be used together, not only to meet the color and saturation, but also to ensure that the color weather resistance, and affordable.
At present, the harmful substances in the color paste composition sounds terrible, but in the production, the toxic elements in the color paste composition will be within the national standard, with the increase of the environmental quality requirements of the paint, the harmful substances produced in the color slurry composition to the human body basically no harm.
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