Poly(perfluoroalkylene oxide) derivatives
AssigneeMinnesota Mining and Manufacturing Company
InventorsRonald A. Mitsch, Joseph La Mar Zollinger
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Abstract
Polyfunctional poly(perfluoroalkylene oxide) compounds, such as compounds of the formula A--CF.sub.2 O(CF.sub.2 CF.sub.2 O).sub.m (CF.sub.2 O).sub.n CF.sub.2 --A' where A and A' are reactive radicals containing a polymerizable functional group, e.g., hydroxyl, are provided, such compounds being useful as monomers in the preparation of polymeric materials, e.g., polyurethanes, possessing unusual low temperature stability and resistance to solvents.
Claims4
Linear hydroxy-terminated poly(perfluoroalkylene oxide) compounds having a number average molecular weight of 500 to 10,000 and the general formula
- R--FC.sub.2 O--(CF.sub.2 CF.sub.2 O).sub.m (CF.sub.2 O).sub.n CF.sub.2 --R'
- where R and R' are --C(O)N(R")CH.sub.2 CH.sub.2 OH where R" is hydrogen, lower alkyl of 1 to 8 carbon atoms, or ethylol, where m and n designate randomly distributed perfluoroethyleneoxy and perfluoromethyleneoxy backbone subunits, respectively, the ratio m/n being 0.2/1 to 5/1, said compounds having a glass transition temperature lower than -78.degree. C and polymerizable to polyurethanes having recurrent backbone units of the formula --CF.sub.2 O--(CF.sub.2 CF.sub.2 O).sub.m (CF.sub.2 O).sub.n --CF.sub.2 -- which impart to the polyurethanes a glass transition temperature lower than -78.degree. C.
Dependencies are inferred from the claim text.