Wax as a coating extinction agent used earlier, its characteristics is simple to use. After coating construction, because dissolvent volatilizes, the wax in lacquer is precipitate, form fine crystal, float in paint film surface, form the rough surface of a scattering light and have the effect of extinction. Nowadays, except for the polymer mineral wax, wax has been rarely used in paint, replaced by the polymer wax and their modified derivatives. They not only extinction effect is good, and can give paint film good water resistance, heat resistance, skid resistance, anti fouling, and have a good feel, their resistance to scratch is pigment extinction can not reach.

Macromolecule wax serves as extinguisher, its dosage is 0.5-3%, it applies to acrylic paint, alkyd acid paint, nitrocellulose paint and polyurethane paint, industrial baking paint, vinyl paint and emulsioni paint.

Polyethylene wax is a low molecular weight polyethylene homopolymer or copolymer widely used in coatings. By wax, the polymer is distributed on the coating surface in a microcrystalline form and performs a variety of practical functions similar to wax.

The main functions of polyethylene wax in solvent-based coating film are: extinction, precipitation resistance, thixotropy, good lubrication and processing, metal positioning.

Polyethylene wax powder should avoid high temperature in the coating, because polyethylene wax will dissolve in high temperature and solvent, and precipitation when cooling, forming larger particles.

The role of polyethylene wax depends on the following factors: the variety of polyethylene wax specifications, the formation of particle fineness, the ability to migrate to the surface coating and coating composition, the nature of the substrate coating, construction and application methods. Polyethylene wax as an additive, in addition to solvent coatings and inks, also used in water-based coatings and inks.

The function of polyethylene wax

1, good extinction

In the application of extinction coating, the amount of silicon dioxide in the same range of the amount of extinction effect. The amount of extinction depends on the particle fineness of the dispersed polyethylene wax and its ability to migrate to the coating. As a matting agent, its outstanding advantages are: excellent transparency, smoothness, soft appearance, chemical inertia, no precipitation, scratch resistance, wear resistance, anti contamination. Its comprehensive performance is far from that of other extinction agents.

Polyethylene wax as a glazing agent commonly used in: 1, nitro varnish; 2, acid curing varnish; 3, polyurethane varnish; 4, polyester varnish, high quality plain varnish.

2, scratch resistance, wear resistance, polishing resistance, anti imprint

One of the factors to enhance the friction resistance and scratch resistance is to reduce the friction coefficient of the coating surface, so that when the object contacts the coating surface, the sliding tendency is greater than the scratch tendency. In this respect, the effect of polyethylene wax is similar to silicon oil, the difference is that the former exists on the coating surface in the form of small dispersed particles. Scratch resistance is important for wood paint and other decorative coatings. Polyethylene wax, added to paint can greatly reduce the friction and be polished on the tendency, and maintain the durability of low gloss, often in the application is very needed. When metallic objects come into contact with coated products, they sometimes leave black marks on the film. Polyethylene wax added to the film can reduce this tendency or make the marks easier to erase.

3. Anti-adhesion

Some workpieces such as wooden or metal objects, often need to stack up in a short time after the film, printing technology progress also requires ink to avoid the stain of printing. Polyethylene wax can prevent adhesion and smudging caused by the accumulation and overlap of production or printed matter.

4, anti precipitation, anti flow, thixotropy. Orientation of metal pigments. Polyethylene waxes are dispersed in aromatic and aliphatic solvents to increase the precipitation resistance of paints and inks. They also exhibit varying degrees of thixotropy, flow resistance and orientation to metallic pigments.