| 摘要 |
<p>Perfluoropolyether lubricants containing sulphonylfluoride groups pending along the perfluoropolyether chain and having the following formula: <CHEM> wherein: T are end groups selected from -CF2X (X=F,CF3,Cl), -C3F7, -COF, -CF(CF3)COF, -CF2COF, -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 5x10<5>, preferably from 1,000 to 50,000.</p> |
