Polyethylene waxes are being produced through the highpressure polymerization of ethylene. Highly derived, very stable (temperature, pressure, UV light, chemicals) molecular structures are being produced. Final products made from these are very durable and do not yellow.
SYNTHESIS BY THE ZIEGLER-NATTA METHOD
The polymerization named after Karl Ziegler and Giulio Natta is carried out at low pressures and temperatures with the use of organometallic catalysts. This causes low-branched, crystalline structures.
THERMAL DEGRADATION PROCESS OF POLYETHYLENE
The term degradation means the targeted and controlled reduction of the molecular weight of polymers under pressure and temperature. The main purpose here is to improve the rheological properties and the specific formation of required carbon chains (molecular weight). Shorter carbon chains are flexible, offer good adhesion properties, are polishable and emulsifiable.
OXIDATION OF SYNTHETIC WAXES
With the aid of oxygen all synthetic waxes can be oxidized at temperatures usually just below the melting point. Oxidized waxes of the DEUREX EO series are used for the preparation of water borne emulsions and serve as internal lubricants.
Walter Reppe was the name giver of the synthesis with acetates under increased pressure. The polyethylene wax is being produced according to the vinylation method.