Patent ID: 9403923
Filing Date: 2016-08-02
CPC Classification: C08F,C08L,C09D,C09J

Claim Text:
1. A process for preparing a polyethylene wax, the wax having a penetration number in accordance with DIN 51579 of not more than 1 mm·10 −1 , by polymerizing of ethylene in the presence of a Ziegler-Natta catalyst system composed of titanium tetrachloride and a dialkylaluminium halide, wherein the polymerization temperature is in the range from 170 to 200° C., the polymerization is carried out essentially in the absence of solvents, the dialkylaluminium halide is added to the process at a rate of 1.4 kg/hour, and the Al/Ti molar ratio is less than 1.6.