The way of adding wax powder in paints, 3 main issues should be noted.
PE wax will be dissolved at higher temperature, and the coarse phenomenon will appear when it is coagulated again, and it cannot be dispersed again, therefore, the stirring temperature should be controlled below 45℃. Polyethylene wax dissolves in aromatic, aliphatic and chlorinated solvents; it has less solubility in glycol ether, esters, ethanol and acetone solvents.
In the use of water-based system, the wax powder should be made into wax slurry firstly:
1, with a small amount of solvent will be fully wetted wax powder;
2, in the case of sufficient shear fully stirred;
3, according to the formula to add solvent and high-speed stirring, made of slurry spare;
4, slurry can be stored: to ensure that the solvent does not evaporate, the slurry can be stored for not less than 30 days;
5, solvent: preparation of wax dispersion, generally use esters or alcohols to do solvent
In the solvent-based system, the wax powder can be added directly. The addition requires a proper shear force and at least enough vortex when mixing with a spiral stirrer to ensure a proper dispersion of the wax micro-powder particles.
In the case of grinding process, it can be added together with other powders when grinding color, but we should pay attention to control the grinding temperature, which should not exceed 45℃, otherwise the micronized wax is easy to crystallize and return to coarse after softening.
1, stir at a low speed until a vortex is generated, then add the wax powder to the center of the vortex in small quantities in batches
2, after all the wax powder is added, then increase the mixing speed to 1200rpm and stir fully until the complete dispersion and mixing is uniform.
This kind of micronized waxes are non-toxic, tasteless, non-chemical corrosive, with good chemical stability and solvent resistance. It can be widely used in powder coating, furniture paint, decoration paint, motorcycle paint, automobile paint, plastic paint, toy paint, industrial paint, UV floor paint, cell phone paint, floor paint, anti-corrosion paint, various inks, coatings, paints, UV coatings, PU synthetic leather, leather surface treatment, varnish additives, can play a good dispersion performance, and can significantly improve the wear resistance, anti-scuffing and slipperiness, hardness etc.
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