What is a montan wax? A brief analysis of the specific application in plastics

The amide wax Licolub Fa1 is often used as an internal lubricant in PS production to improve demolding. In order to improve the activity of the particles, a small amount of Fa1 can also be used. Since the particle size of Fa1 is less than 40 microns, it adheres firmly to the particles. The dosage was 0.05% at this time. The addition of Fa1 to granulation requires additional procedures and leads to excessive lubrication, which in particular reduces yield in single-screw granulators. Manufacturers have tried to melt Fa1 in the monomer to overcome the above shortcomings, but the problem is that Fa1 is too volatile when vacuuming out the remaining monomer. The montan wax shows excellent performance here and can be added before the polymerization process. The addition of 0.1-0.2% of the montan wax is sufficient to improve the release properties of the PS injection molding. In terms of mold release, the OP wax is slightly better than the E wax, but the E wax is more transparent.

(1) Application of Montan wax in linear polyester (PET/PBT) This refers to application to injection molding rather than spinning. Montan wax plays an important role in improving the release and activity of filled PET/PBT. Licowax E, OP and WE4 show the best performance in polyester.

(2) Application of Montan wax in thermoplastic polyurethane Thermoplastic polyurethane (TPU) is very viscous after processing. As a result, it is difficult to mold release and stack adhesion. It is difficult to open the anti-sunrise tube when it is rotated inside. Licolub Fa1 is useful as an internal lubricant. However, the disadvantage is that in the usual amount of 0.5-1.0%, the product will migrate to the surface and bloom during the hiding process. Licowax E gives a very good release effect without migrating. It can be used alone in an amount of 0.5-1.0%, or in an amount of 0.3-0.5% with 0.3% of Fa1.

(3) Application of Montan wax in thermosetting plastics. Thermosetting plastics require lubricants and mold release agents during production and processing. These products must be precisely and consistent with each other. The use of a compatible internal lubricant improves the mobility, while the external lubricant reduces the adhesion of the material to the hot machine parts, thus improving the release. As a pure internal lubricant, it is of course possible to use a fatty acid ester and a metal stearate as a release agent. In contrast, the montan wax combines with the internal lubricant with a strong release effect, providing a greater range of manipulations. They neither plasticize the product nor migrate, which is very important for further processing of the article. In the Montan wax, Licowax OP has the best lubrication and release properties. Its optimum use concentration is over 02-0.5%. Especially in phenolic resin esters, the basic point must be neutralized, 0.3% of Licowax OP and 0.2% of Licowax S are used in combination to produce the best effect. The S wax reacts with the amine, and the product, montanoic acid amide, provides additional Release effect.

(4) The application of Mengdan wax in the recently developed engineering plastics. Due to the continuous demand for engineering plastics and the efforts of plastics manufacturers to develop new markets for special products, the development of new plastics has been growing. As application technology is constantly in the process of continuous improvement, these plastics often bring processing difficulties. They either have very high molecular weights and are therefore extremely poorly mobile, or such as durable copolymers at low temperatures, which are very viscous after processing. In these applications, Montan wax is a valuable processing aid due to its low volatility and its combination of internal and external lubrication in polar and non-polar plastics, additional release and migration resistance. . There are already examples in newly developed plastics that show that only the application of Munden wax, these plastics have market development value.

(5) Montan wax is used as a carrier for the pigment concentrate. The pigment is dispersed in Licowax OP to impart non-spot coloring to PVC, and can also be used for coloring polyamide while improving demolding. Licowax E has proven to be an excellent binder for binding pigments to polymer particles and an excellent binder for producing dust-free, non-agglomerating, and easily active pigment concentrates in high-speed mixers.