Patent ID: 7615522

Claim:
A polymeric compound of the formula X-[(A x -B y )—Y-Z] m (I), wherein X represents the fragment of a polymerisation initiator which initiates polymerisation of ethylenically unsaturated monomers by atom transfer radical polymerisation (ATRP) in the presence of a catalyst which activates controlled radical polymerisation by ATRP; A and B represent polymer blocks composed of repeating units of ethylenically unsaturated monomers; One of x and y independently of one another represents zero, one or a numeral greater than one and the other one represents one or a numeral greater than one, provided that the sum of x and y is at least two; Y represents the direct bond or a bivalent group; Z represents a polymer chain terminal group structurally modified with a functionally effective group of a lubricant or polymer additive, wherein Z is derived from an antioxidant molecule selected from the group consisting of alkylated monophenols, alkylthiomethyl phenols, alkylidene bisphenols, esters of β-(5-tert-butyl-4-hydroxy-3-methylphenyl)-propionic acid, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, β-(3,5-dicyclohexyl-4-hydroxyphenyl) propionic acid or 3,5-di-tert-butyl-4-hydroxyphenylacetic acid, diphenylamines, benzofuranones, phosphites, phosphonites and thiosynergists, or a metal deactivator molecule selected from the group consisting of benzotriazoles, triazoles, benzimidazoles, imidazoles, benzothiazoles and thiadiazoles and derivatives thereof, or an antioxidant, extreme pressure or antiwear (EP/AW) molecule selected from the group consisting of phosphates, thiophosphates, thiophosphites, dithiophosphates, phosphonates, thiophosphonates, dithiocarbamates and esters of thiodipropionic or thiodiacetic acid and m represents a numeral from one to six.