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Fischer Tropsch Wax consists of straight chain that its relative molecular mass is between 500-1000, saturated high alkanes, so it results in this chemical fine crystal structure, high melting point, narrow melting range, low oil content, low penetration, low mobility, low melt viscosity, hard, wear and high stability.
The difference between Fischer Tropsch wax and PE wax:
(1) Molecular weight. Fischer-Tropsch wax molecular weight is much lower than the PE wax. Its branch is also less . It has high crystallinity.It is easy to penetrate into the high viscosity macromolecular chain. Then it can reduce the melt viscosity significantly. Its migration is small in the process.And lubrication effect is obvious in late period.
(2) Fischer-Tropsch wax is saturated straight-linked alkane without double bond. It has strong oxidation resistance and good weather resistance.
(3) Fischer-Tropsch wax viscosity is much lower than PE wax. Its viscosity is only about 10. Less Fischer-Tropsch wax can achieve the same lubrication.Its use is only 70-80% of PE wax.Fischer-Tropsch wax is well compatible with PVC and is qualified for both internal and external lubricants. Fischer-Tropsch wax can be used as good internal lubricants to effectively control the shear conditions, promote flow, control friction and has good melt properties. So, it can improve thermal stability. At the same time, due to its high crystallinity and high linearity of the structure, PVC products can get the best physical and processing performance. During process ,Fischer-Tropsch wax can synthesize alkanes of different chain lengths to change the molecular weight of the final product to form a series of products.
Table 1: Compare Fischer Tropsch Wax with PE Wax
Fischer Tropsch Wax
Powdery, columnar, flaky
Melt viscosity (140 ° C)
Penetration 0.1 mm