Patent ID: 6368239
Filing Date: 2002-04-09
Classification: C08K,C09D,Y02P

Abstract:
A method of making a modified particle comprising a particle having attached a group having the formula: wherein Ar represents an aromatic group; R1 represents a bond, an arylene group, an alkylene group, wherein R4 is an alkyl or alkylene group or an aryl or arylene group; R2 and R3, which can be the same or different, represent hydrogen, an alkyl group, an aryl group, â€”OR5, â€”NHR5, â€”NR5R5, or â€”SR5, wherein R5, which is the same or different, represents an alkyl group or an aryl group; and SFR represents a stable free radical, wherein said method comprises reacting a) a particle having attached an aromatic group with a group containing an abstractable proton and which leaves behind a carbon-centered radical when the proton is abstracted with b) a reactive free radical source and c) a stable free radical source.