Solubility of perfluorinated polyethers in fluorinated solvents
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorJohn Burns
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Abstract
Methods of improving the solubility of highly functionalized polar perfluorinated polyethers in fluorinated solvents are described. In preferred embodiments, the ratio of solubilizer to fluorinated solvent is the azeotropic ratio. The solubilizer can be an alcohol or cyclic ether. The methods finds utility in hard disc drive applications, where perfluorinated polyethers are used as lubricants. Compositions are also provided.
Claims34
A method of improving the solubility of perfluorinated polyethers in fluorinated solvents, comprising adding a solubilizer to the solvent, wherein the solubilizer is selected from alcohols and cyclic ethers.
A method of dissolving a perfluorinated polyether for use in hard disk drive applications, comprising:
- (a) providing a fluorinated solvent;
- and
- (b) adding a solubilizer and a perfluorinated polyether to the solvent;
- wherein the solubilizer is selected from alcohols and cyclic ethers.
A lubricating composition comprising a perfluorinated polyether, a fluorinated solvent and a solubilizer selected from alcohols and cyclic ethers.
Dependencies are inferred from the claim text.