High-pressure polyethylene pipe resins are mainly be produced to water pipes

gas pipes and a variety of industrial pipes

which special resins with high technology and good market prospect. Most of the high pressure-resistance polyethylene pipe resins have bimodal or multimodal molecular weight distribution

and the polymerizations are often be carried out in double or multiple series reactors with metallocene or Z-N catalyst which is with good copolymerization performance. The paper mainly describes the molecular structure

properties

catalyst and techniques of high-pressure polyethylene pipe resins

and provides a review of domestic catalysts and preparation technologies.