Lubricating greases
AssigneeAusimont S.p.A.
InventorsEzio Strepparola, Mario Alfieri, Piero Gavezotti
Life of this patent
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Abstract
New lubricating greases, the oily component of which is perfluoropolyether or fluoropolyether derivative of formula R--O--Q--CFX--(Y).sub.n --Z, having a number average molecular weight ranging from 1,500 to 10,000. wherein R is perfluoroalkyl radical R.sub.F or Z(Y).sub.n)--CFX; Q is perfluoroalkylpolyether or fluoroalkylpolyether chain; X is F or CF.sub.3 ; Y is a linking divalent radical; n is zero or 1; and Z is a radical selected from --CH.sub.2 OH, --CH.sub.2 OR.sup.1, --COOR.sup.2, --CONR.sup.3 R.sup.4 etc. . . . or from particular radicals containing heteroatoms or particular aromatic radicals.
Claims18
A lubricating grease comprising a thickening agent and a perfluoropolyether or fluoropolyether derivative of the formula R--O--Q--CFX--(Y).sub.n --Z, having a number average molecular weight ranging from 1,500 to 10,000, in which:
- R is a perfluoroalkyl radical containing 1 to 3 carbon atoms or it is the group Z--(Y).sub.n --CFX;
- Q is a perfluoroalkylpolyether or fluoroalkylpolyether chain;
- X is F or CF.sub.3 ;
- Y is a linking divalent radical;
- n is zero or 1;
- Z is a radical selected from the group consisting of --CH.sub.2 OH, --CH.sub.2 OR.sup.1, --COOR.sup.2, --CONR.sup.3 R.sup.4, --CN, --CH.sub.2 NH.sub.2, --CH.sub.2 NHR.sup.5, --CH.sub.2 NR.sup.6 R.sup.7, --CHOH--CH.sub.2 OH and --COR.sup.8,
- wherein
- R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8, alike or different from one another, are an alkyl group containing 1 to 8 carbon atoms, an aromatic group containing 6 or 10 carbon atoms or an alkyl aromatic group containing 7 to 11 carbon atoms and in which the aromatic ring or rings are unsubstituted or substituted with alkyl or polyethoxy substituting groups, or Z is an organic group selected from the group consisting of non-aromatic and non-fluorinated radicals containing two or more heteroatoms, alike or different from one another, selected from the group consisting of O, N, S, Se and P and located in position 1-3, 1-4, or 1-5 to one another;
- said aromatic or non-aromatic radicals are unsubstituted or substituted with one or more substituting groups selected from the group consisting of NO.sub.2, CN, R.sup.9 or OR.sup.9, wherein R.sup.9 is an alkyl radical containing 1 to 3 carbon atoms.
A lubricating grease comprising a thickening agent and a perfluoropolyether or fluoropolyether derivative of the formula R--O--Q--CFX--(Y).sub.n --Z, having a number average molecular weight ranging from 1,500 to 10,000, in which:
- R is a perfluoroalkyl radical containing 1 to 3 carbon atoms or it is the group Z--(Y).sub.n --CFX;
- Q is a perfluoroalkylpolyether or fluoroalkylpolyether chain;
- X is F or CF.sub.3 ;
- Y is a linking divalent radical;
- n is zero or 1;
- Z is an organic group selected from the group consisting of aromatic radicals unsubstituted or substituted by one or more heteroatoms, either alike or different from one another, selected from the group consisting of O, N, S, Se and P, said aromatic radicals are unsubstituted or substituted with one or more substituting groups selected from the group consisting of NO.sub.2, CN, R.sup.9 or OR.sup.9, wherein R.sup.9 is an alkyl radical containing 1 to 3 carbon atoms.
Dependencies are inferred from the claim text.