Polyfluorinated, branched-chain diols and diisocyanantes and fluorinated polyurethanes prepared therefrom
AssigneeFluorochem, Inc.
InventorsKurt Baum, Thomas G. Archibald, Aslam A. Malik
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Abstract
Branched-chain diols and a method of forming them by reacting 1,4-diiodoperfluorobutane and perfluoropropylene to obtain branched-chain diiodide adducts thereof, reacting the diiodide adducts with ethylene to obtain I--CH.sub.2 CH.sub.2 --R--CH.sub.2 CH.sub.2 --I, wherein R is a branched-chain perfluoroalkyl radical, and hydrolysing the iodo groups to alcohols to obtain HO--CH.sub.2 CH.sub.2 --R--CH.sub.2 CH.sub.2 --OH. These diols can be reacted with branched-chain diisocyanates to form polyurethanes of better processability and lower glass transition temperatures than polyurethanes prepared from linear fluorinated monomers.
Claims5
A new composition of matter selected from the group consisting of I--CH.sub.2 CH.sub.2 --R--CH.sub.2 CH.sub.2 --I, which is an ethylene-inserted diiodide adduct of an .varies.,.omega.-diiodoperfluoroalkane having the formula I(CF.sub.2).sub.n I, wherein n is a whole number of from 2 to 12, inclusive, and CF.sub.2 .dbd.CF(CF.sub.2).sub.n F, wherein n is a whole number of from 1 to 10, inclusive, R being a branched-chain perfluoroalkyl radical;
- HO--CH.sub.2 CH.sub.2 --R--CH.sub.2 CH.sub.2 --OH;
- H.sub.2 N--CH.sub.2 CH.sub.2 --R--CH.sub.2 CH.sub.2 --NH.sub.2 ;
- and OCN--CH.sub.2 CH.sub.2 --R--CH.sub.2 CH.sub.2 --NCO, wherein R, each instance, is the same as defined above.
Dependencies are inferred from the claim text.