Transparent powder is a new type of functional transparent filler with high transparency, good hardness, excellent color, high gloss, good anti-collapse and less dust during use. Widely used in oily furniture paints, decorative paints, adhesives, inks, and plastics. At first, the transparent powder was only used in oily wood lacquer. In more than 10 years, the market has been familiar with, familiar with, cautious use, familiarity, and extensive application, and has been widely used up to now. Transparent powder can be said to have undergone a revolutionary change.
First, the classification and characteristics of transparent powder
The transparent powder is classified into a type containing crystal water and no crystal water. The crystallization-containing variety means that the molecular structure of the product contains chemical structure water (ie, H2O), and its volatile content is generally 15%-20%. The amount of volatile matter depends on the crystal rock itself, and also depends on the production process. control. In general, the high volatility of the variety has a relatively high transparency, which makes many technicians worry that the volatiles will affect the use and effect of the coating.
In fact, the material that really affects the quality of the coating is the physical moisture of the transparent powder, that is, the surface water. The physical moisture will participate in some direct or indirect reactions, affecting the use and performance of the coating, and most transparent powder manufacturers will take their physical water. The content is controlled below 0.5%, which maintains other properties of the product, such as dispersibility, anti-fog, drying, side effects, etc., while ensuring its transparency. However, if the transparent powder containing crystal water is improperly treated during use, it will easily absorb moisture and produce a phenomenon of condensed particles, which must be achieved by means of grinding pressure to achieve a normal dispersion effect.
In response to this, many manufacturers are constantly improving, and the current situation of this phenomenon is also becoming less. In addition, although the transparent powder has good transparency, it also has a certain blue light phenomenon like fumed silica. If it is too thick or too disposable for use on some dark substrates, it is easy to cause fogging by blue light phenomenon. And whitish, this is also a phenomenon that some enterprise technicians do not want to see, so it is also subject to some limitations in use.
Second, the use of transparent powder
1, wood coating: can be applied to PU, PE, NC transparent wood paint primer and UV light curing paint to increase transparency, oiliness, hardness, improve anti-collapse, can also be used for waterborne wood paint, oily white paint, etc. The color primer improves the gloss and oxidation resistance of the paint film and increases the fluidity of the paint liquid.
2, oily adhesive: can be used in adhesives to improve solid content, adhesion, hardness, dryness and other physical and chemical properties.
3, artificial stone: in the stone can improve its transparency, gloss, hardness, reduce overall costs.
4, plastic filler: improve product hardness, fire resistance, acid and alkali resistance, electrical insulation, dimensional stability, creep resistance, crack resistance, high transparency, good toughness.
Third, the problem that transparent powder should be paid attention to during use
After the product containing crystal water is made into paint, the paint liquid is micro-belt blue phase. When producing paints and coatings for dark substrates, if the construction is too thick and easy to whiten, please use it together with other powders, or determine by experiment. Use after appropriate addition.
2. Due to the high hardness and smoothness of the transparent powder (especially the glass transparent powder), the paint film is difficult to be polished. It is necessary to adjust the formulation system, adjust the dry speed of the paint film, and appropriately increase the cost of the polishing agent.
3, transparent powder oil absorption is low, anti-settling is relatively difficult. In the coating system, the precipitation of the transparent powder is relatively fast compared to the raw materials such as resin, talc, zinc stearate, etc., because its specific gravity is larger than that of the resin, and the oil absorption value is low, so the precipitation is fast, and it is required to properly prepare the anti-settling system. Adjust to meet the market's requirements for product anti-sedimentation.
4. Transparent powder containing crystal water is easy to lose water and easy to absorb moisture, so it is required to be packaged in moisture-proof and stored in a cool dry place. The requirements for products in the process of storage and transportation are also relatively high.
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