Poly(perfluoroalkylene oxide) derivatives
AssigneeMinnesota Mining and Manufacturing Company
InventorsRonald A. Mitsch, Joseph La Mar Zollinger
Life of this patent
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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.
Claims11
Linear functionally-terminated poly(perfluoroalkylene oxide) compounds having 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 --X.sub.a YZ.sub.b or --X'.sub.a' Y'Z'.sub.b', X and X' are each a polyvalent linking organic radical, Y and Y' are each a polyvalent linking organic radical free of non-aromatic double bonds, Z and Z' are each a polymerizable functional group, a and a' are zero or one, b and b' are integers of 1 to 3, m and n designate the number of randomly distributed perfluoroethyleneoxy and perfluoromethyleneoxy subunits, respectively, the ratio m/n being 0.2/1 to 5/1, said compounds having a number average molecular weight of 500 to 20,000, a glass transition temperature lower than -78.degree. C, and polymerizable to polymers 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 polymers a glass transition temperature lower than -78.degree. C.
Linear hydroxy-terminated poly(perfluoroalkylene oxide) compounds having a number average molecular weight of 500 to 10,000 and the general formula
- R--CF.sub.2 O--(CF.sub.2 CF.sub.2 O).sub.m (CF.sub.2 O).sub.n OCF.sub.2 --R'
- where R and R' are hydroxy-substituted organic radicals, 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.
Liquid, linear hydroxy-terminated poly(perfluoroalkylene oxides) having a glass transition temperature lower than -78.degree. C., a number average molecular weight of 500 to 10,000, and having the general formula
- HOCH.sub.2 --CF.sub.2 O--(CF.sub.2 CF.sub.2 O).sub.m (CF.sub.2 O).sub.n --CF.sub.2 --CH.sub.2 OH
- where m and n designate randomly distributed perfluoroethyleneoxy and perfluoromethyleneoxy backbone subunits, respectively, the ratio m/n being 0.2/1 to 5/1.
Liquid, linear hydroxy-terminated poly(perfluoroalkylene oxide) compounds having a glass transition temperature lower than -78.degree. C, a number average molecular weight of 500 to 10,000, and having the general formula
- R--CF.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 hydroxy-substituted aliphatic radicals, 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 being 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.