Verfahren zum Herstellen niedrigmolekularer,wachsartiger Polyaethylene

摘要

1,215,837. Low molecular weight polyethylene. BADISCHE ANILIN. & SODAFABRIK A.G. 2 May, 1968 [6 May, 1967], No. 20861/68. Heading C3P. Low molecular weight waxy polyethylene (a molecular weight up to 10,000) is prepared by-polymerizing ethylene at 200-300‹ C. and under a pressure of 1200-2500 atmospheres using a free-radical initiation, wherein the ethylene contains (a) 10-30% by volume of hydrogen or a C 2 -C 4 alkane and (b) 0À5-3% by volume of a C 3 -C 4 alkene. The alkane component (a) may be one or more of ethane, propane, butane and isobutane and (b) may be one or more of propene, butene-1, butene-2 and isobutylene. The initiator, which may be oxygen or dilauroyl peroxide, is perferably used in amounts of 0À5-2 moles per mole of ethylene. In the examples, ethylene containing hydrogen or propane, and propene or isobutylene, is continuously polymerized, the initiator being oxygen or dilauroyl peroxide.