Features: High transparency and gloss, Good abrasion resistance Applications: Water-based coating system, Polish agent, Polish oil, Metal mold release agent, Leather finishing agents
Our waxes have been exported to Japan, Europe, North America, Brazil, New Zealand, and 20 other countries and regions throughout the world.
Wax can play a role in the various processes of curing powder coatings. Whether it is extinction or improving the performance of the film, the first time will think of using micronized wax. Of course, different types of micronized wax plays a different role in powder coatings.
The role of wax powder in paint, there are mainly the following aspects, let's learn together:
Since the powder coated substrate has small molecular substances on its surface, especially on porous substrates such as cast iron, cast aluminum, and zinc substrates, such micronized waxes solve such problems as pores, bubbles and depressions caused by the above substrates coating defects.
Some amino-modified, due to the same type as used in powder coatings, have better wetting in coated fillers and pigments.
Basically, each wax powder has the effect of improving the smoothness of the powder and increasing the storage stability of the paint. Generally, considering the cost, the amount added in the formulation is 0.2-0.5% (wt), and the selected wax powder is more popular. One thing to note is that the production process of low-grade wax and the influence of impurities on the powder coating cannot be ignored.
In addition, the micronized wax can also play a role in controlling gloss, chemical resistance, abrasion resistance, scratch resistance, anti-scratch, etc. in the coating ink. Please also consult the sales staff of Jin Yu International Wax Powder about which kind of micronized wax is suitable.
Characterization
Outside view: white powder
Density: 0.93g
Melting point: 120 C
Average particle size: 5um
1. Ultrafine modified micronized wax powder provides excellent scratch resistance and excellent extinction, transparency and handle.
2. It has a small particle size, good dispersion, and good anti-caking property.
3. It can significantly reduce the stacking phenomenon in the offset printing process. Scope of application:
Solvent-based wood coatings system, ink, industrial baking varnish, polyester baking varnish additions:
For 0.5-2% of the total amount, please test the optimum dosage before using due to the different system.
Micronized wax powders should be stored in a cool and dry ventilated place, sealed in containers, away from fire sources and heat radiation for a maximum storage period of 2 years.
Comparing the quality of imported and domestic polyethylene wax, there are the following differences:
1.Different molecular weight. The molecular weight distribution (MWD) of imported polyethylene wax is about 5 (the ratio of Mw to Mn), while that of domestic wax is about 10. Therefore, the quality of the color masterbatch is affected.
2. Imported polyethylene wax has different modification methods, so it can be used in different plastics (engineering plastics, rubber, etc.) and different pigments (powder coatings) to have better dispersion, internal and external lubrication, and achieve the excellent demoulding effect.
3. Imported polyethylene wax has less ash (impurities).
Wax is divided into emulsion form, flake, and micronized wax. There is pure natural wax, modified natural wax, semi-synthetic wax, synthetic wax and so on. Powder coatings are mainly used for polymer modification and synthetic wax, and are solid, such as polyolefin wax and polytetrafluoroethylene (PTFE wax).
Frosting effect
When the melting point of the selected wax is lower than the baking temperature, because the wax melts into a liquid during baking, a thin layer similar to frost is formed on the coating surface after film cooling.
Axis effect
The effect is that the wax is exposed to the outside by its own particle size similar to or larger than the thickness of the coating film so that the scratch resistance and scratch resistance of the wax can be shown.
Floating effect
Regardless of the wax particle morphology, wax drifts to the surface of the film during film formation and disperses evenly, which makes the top layer of the film protected by wax and shows the characteristics of wax.
Degassing
Because there are small molecular substances on the surface of powder coated substrates, especially in porous substrates such as cast iron, cast aluminum, and zinc substrates, this kind of wax solves coating defects such as pores, bubbles, and depressions caused by the above substrates.
Improving leveling
Some amino modified polyethylene waxes have better wettability in resin-coated fillers and pigments because they are of the same type as the leveling agents used in powder coatings. As a result, surface leveling also improves.
Increasing Smoothness of Powder
Basically, each kind of micronized wax powder has the effect of improving the smoothness of powder and increasing the storage stability of paint. Generally speaking, considering the cost, adding 0.2-0.5% (wt) in the formula, the micronized wax powder is more popular. It should be noted that the influence of the manufacturing process and impurities of low-grade wax on powder coatings cannot be ignored. More importantly, in addition to some wax formulations, when baking, odor and smoke are particularly large, which is not conducive to environmental protection and safety. Additionally, the raw material with a small amount of wax is not easy to stick to the cooling roll after extrusion.
Controlling glossiness
There are two kinds of extinction: physical extinction and chemical extinction. The extinction of polyolefin wax belongs to the former. The wax will float to the surface of the film and form fog when baking, thus reducing the gloss. If a micronized wax powder is used alone, the dosage is 1.0-3.5% (wt). In such applications, micronized wax should be used as far as possible because it is easy to disperse. If wax sheets are used and added to 1.5% (wt), there will be a small dent on the surface of the coating. And after re-extrusion, the depression will only increase. Planar products generally add up to 3.5% (wt). If this amount is exceeded, the horizontal fluidity of powder melting decreases obviously. Moreover, the greater the wettability of the powder, the worse the changeability of the powder.
It is chemically resistant.
Due to the floating effect of wax, a compact oil bearing layer is formed on the surface of the coating, so the boiling water resistance is better, and the salt spray resistance is superior.
It is wear-resistant, scratch-proof and scratch-proof.
Wax is distributed on the surface of the film to protect the film, prevent scratches, scratches and provide wear resistance. Generally, propylene modified wax and polytetrafluoroethylene wax are added, especially for dark flat formula and low gloss sand grain formula.
