Patent ID: 6077909
Filing Date: 2000-06-20
Classification: C08F,C10L,C10M

Abstract:
A method for making halogen containing polyolefin reaction products having labile halogen substituents for use in lubricants, the method comprising the steps of:A. forming a mixture comprising a conventional polyolefin having a molecular weight of Mn 300-10,000 and having a total of tetra- and tri-substituted unsaturated end groups in the amount of up to about 90 mole percent based on the moles of said polyolefin and a halogen, said halogen being bromine or chlorine or mixtures thereof, and wherein said mixture further comprises hexane or other substantially chlorine inert liquid as a solvent, and wherein said mixture is heated at a temperature of less than about 70.degree. C.; andwherein said halogen is present in said mixture on a molar basis up to about an amount equal to the moles of tetra- and tri-substituted end groups;B. reacting said mixture under time and temperature parameters selected to effect reaction of said polyolefin end groups and said halogen to produce a polyolefin reaction product having labile halogen substituents, andwherein the polyolefin reaction product halogen content is limited by correlating said amount of halogen reacted to said tetra and tri-substituted end groups, and wherein said reaction is carried out using a dilution gas.