Claims
- 1. A method of making a mono-substituted fluorinated oxetane (FOX) monomer having the structure: ##STR14## where n is 1 to 3, R is methyl or ethyl, and R.sub.f is a linear or branched chain perfluorinated alkyl or isoalkyl having from 1 to 20 carbons or a oxa-perfluorinated polyether, having from 4 to about 60 carbons comprising the steps of:
- a) providing a mono-substituted oxetane premonomer having the structure: ##STR15## where R.sup.1 is selected from the group consisting of methyl and ethyl and X is a leaving group selected from the group consisting of bromo, chloro and iodo, said mono-substituted oxetane premonomer being mixed with water to provide an aqueous mixture of said mono-substituted oxetane premonomer;
- b) charging a reaction vessel with said aqueous mixture of said mono-substituted oxetane premonomer, a fluoroalcohol having the formula R.sub.f CH.sub.2 OH, wherein R.sub.f is a linear or branched chain perfluorinated alkyl or isoalkyl having from 1 to 20 carbons or a oxa-perfluorinated polyether, having from 4 to about 60 carbons, a phase transfer catalyst and a strong base to form a reaction mixture; and
- c) heating said reaction mixture until the reaction is complete and forms the FOX monomer as an organic layer.
- 2. A method of making a mono-substituted FOX monomer as in claim 1 which includes the steps of:
- a) cooling the reaction mixture; and
- b) separating the mono-substituted FOX monomer as an organic layer from the aqueous reaction mixture.
- 3. A method of making a mono-substituted fluorinated oxetane monomer as in claim 1 wherein:
- a) said fluorinated alcohol is selected from the group consisting essentially of trifluoroethanol, heptafluorobutanol, pentadecafluorooctanol, tridecafluorooctanol and other fluorinated alcohols having the following formulas: ##STR16## wherein n is 1 and x is 1 to 20 and mixtures thereof.
- 4. A method of making a mono-substituted FOX monomer as in claim 3 wherein:
- a) said phase transfer catalyst is selected from the group consisting of tetrabutylammonium bromide, tetraethylammonium bromide, trimethylbutylammonium bromide, tetramethylammonium iodide, cetyltributylammonium bromide, crown ethers, glycols and mixtures thereof.
- 5. A method of making a mono-substituted FOX monomer as in claim 4 wherein:
- a) said strong base is selected from the group consisting of sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, tetrabutylammonium hydroxide and mixtures thereof.
- 6. A method of making a mono-substituted FOX as in claim 5 wherein:
- a) said strong base is potassium hydroxide and said phase transfer catalyst is tetrabutylammonium bromide.
- 7. A method of making a mono-substituted fluorinated oxetane monomer as in claim 1 wherein said reaction mixture is heated to a temperature of 80-85.degree. C.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a Divisional Application of copending application of the same title, Ser. No. 08/371,914, filed by us on Jan. 1, 1995 now U.S. Pat. No. 5,807,977. That application in turn is a Continuation-In-Part application entitled "Preparation and Polymerization of Perfluoroalkoxy Alkylene Oxides to Prepare Hydrophobic Ethers", Ser. No. 08/206,618, filed Mar. 7, 1994, now abandoned, which in turn is a Continuation application of that same title, Ser. No. 08/080,614, filed Jun. 21, 1993, now abandoned, which in turn is a Continuation-In-Part application of that same title, Ser. No. 07/911,461 filed Jul. 10, 1992, now abandoned. This application is related to the application of that same title, Ser. No. 08/206,859, filed Mar. 7, 1994, now abandoned, which in turn is a continuation of that same title, Ser. No. 07/911,461, filed Jul. 10, 1992, now abandoned. This application is also related to Divisional Applications of the same title Ser. No. 08/483,219, now U.S. Pat. No. 5,668,250, and Ser. No. 08/483,220, now U.S. Pat. No. 5,703,194, filed Jun. 7, 1995. The subject matter of each is incorporated by reference herein to the extent need be.
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348350A1 |
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Divisions (1)
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371914 |
Jan 1995 |
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Continuations (1)
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080614 |
Jun 1993 |
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Continuation in Parts (2)
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911461 |
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