Patent ID: 6573410
Filing Date: 2003-06-03
Classification: C07C,C08G

Abstract:
A process for preparing perfluoropolyether iodides, by reaction with LiI of monoacyl- or diacyl-halides of perfluoropolyethers, having number average molecular weight from 200 to 3,000, and having the following structure:XCOâ€”CF2O[(CF2O)n(CF2CF2O)m]pCF2â€”Qâ€ƒâ€ƒ(II) Wherein:m/n=0.5-10; p=0-20; X=Cl, F; Q=H, CF3, X as above or COXâ€², wherein Xâ€² is Cl, F with the proviso that Xâ€²=X; said process being characterized in that the iodination reaction is carried out at a temperature from 180Â° C. to 260Â° C.