Patent ID: 6403539
Filing Date: 2002-06-11
Classification: C08G,C10M

Abstract:
Perfluoropolyether lubricants containing sequences of oxyperfluoroalkylene units, characterized by the presence of sulphonylfluoride groups pending along the perfluoropolyether chain and having the following formula: wherein:T are end groups selected from â€”CF2X (X&boxH;F,CF3,Cl), â€”C3F7, â€”COF, â€”CF(CF3)COF, â€”CF2COF, â€”CF2COCF3; d,e,f,h are integers; a,b,c can be zero or integers; said units are statistically distributed along the chain being a+b+c+d+e+f+h such that the number average molecular weight ranges from 500 to 5Ã—105.