Lubricant for thin film storage media
View Patent ↗Embodiments relate to lubricants disposed over magnetic storage media, such as rotatable thin film magnetic discs. One embodiment comprises a lubricant compound of a fluoropolyether chain having one or more carbonyl-imide pairs. For example, the carbonyl-imide pair may be located at one end, both ends, and/or in the middle of the fluoropolyether chain.
1. A lubricant composition, comprising a compound selected form the group consisting of Formula CI 1 —FPE 1 , Formula CI 2 —FPE 2 —CI 3 , and Formula FPE 3 —Cl 4 —FPE 4 wherein
FPE 1 , FPE 2 , FPE 3 , and FPE 4 are each a fluoropolyether chain and
CI 1 , CI 2 , CI 3 , and CI 4 , are each a carbonyl-imide pair, wherein the nitrogen of the imide group is linked to an alpha position carbon of the carbonyl group and the fluoropolyether chain is attached to carbonyl-imide pair.
2. The lubricant composition of claim 1 , wherein one carbonyl-imide pair is located at one end of the fluoropolyether chain.
3. The lubricant composition of claim 2 , wherein another carbonyl-imide pair is located at the other end of the fluoropolyether chain.
4. The lubricant composition of claim 1 , wherein at least one carbonyl-imide pair is located within the fluoropolyether chain.
5. The lubricant composition of claim 2 , wherein at least one carbonyl-imide pair is located within the fluoropolyether chain.
6. The lubricant composition of claim 1 , wherein the carbonyl-imide pair is selected from the group consisting of 2-pyridinecarbonyl, 2-quinolinecarbonyl, 3-isoquinolinecarbonyl, 2-pyrimidinecarbonyl, 2-quinazolinecarbonyl, 4-quinazolinecarbonyl, 1-pyrazolecarbonyl, 1-benzopyrazolecarbonyl, 2-benzopyrazolecarbonyl, 2-imidazolecarbonyl, 2-benzimidazolecarbonyl, 2,6-pyridine-biscarbonyl, and derivatives thereof.
7. A lubricant composition, comprising a compound selected form the group consisting of Formula CI 1 —FPE 1 , Formula CI 2 —FPE 2 —CI 3 , and Formula FPE 3 —CI 4 —FPE 4 , wherein each of CI 1 , CI 2 and CI 3 , are independently selected form the group consisting of
CI 4 is
wherein
each R is independently selected from the group consisting of hydrogen, halogen, aqlkyl, haloalkyl, alkenyl, haloalkenyl, alkoxy, haloalkoxy, aryl, haloaryl, arylalkyl, and haloarylalkyl;
FPE 1 , FPE 3 , and FPE 4 are independently selected from the group consisting of —OCH 2 CF 2 —(O—CF 2 ) p —(O—CF 2 —CF 2 ) q —OCF 2 CH 2 —OH, —OCH 2 CF 2 —(O—CF 2 —CF 2 ) q —(O—CF 2 ) p —OCF 2 CH 2 —OH, —(O—CF 2 ) p —(O—CF 2 —CF 2 ) q —O—CF 3 , (O—CF 2 —CF 2 ) q —(O—CF 2 ) p —O—CF 3 , (O—CF 2 ) p —(O—CF 2 —CF(CF 3 )) q —O—CF 3 , —(O—CF 2 —CF(CF 3 )) q —(O—CF 2 ) p —O—CF 3 , —(O—CF 2 —CF 2 —CF 2 ) p —O—CF 2 —CF 3 , —(O—CF 2 —CF 2 —CF 2 ) p —O—CF 2 —CF 2 —CF 3 , —(O—CF 2 —CF(CF 3 )) q —O—CF 2 —CF 2 —CF 3 , and —(O)—(CF(CF 3 )—CF—O) q —CF 2 —CF 2 —CF 3 ;
FPE 2 is —OCH 2 CF 2 —(O—CF 2 ) p —(O—CF 2 —CF 2 ) q —OCF 2 CH 2 —O—;
q is from 1 to 500, and
p is from 1 to 500.
8. The lubricant composition of claim 7 , wherein the compound is a compound of Formula CI 1 —FPE 1 .
9. The lubricant composition of claim 7 , wherein the compound is a compound of Formula CI 2 —FPE 2 —CI 3 .
10. The lubricant composition of claim 7 , wherein the compound is a compound of Formula FPE 3 -CI 4 —FPE 4 .
11. The lubricant composition of claim 9 , wherein the compound of Formula CI 2 —FPE 2 —CI 3 is
12. The lubricant composition of claim 9 , wherein the compound of Formula CI 2 —FPE 2 —CI 3 is
13. The lubricant composition of claim 10 , wherein the compound of Formula FPE 3 —CI 4 —FPE 4 is