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US 11,308,985 B2Granted
Fluoropolyether compound and lubricant
AssigneeSeagate Technology LLC
InventorsYu Lu, JiPing Yang, Jingyuan Zhuo, Qian Guo, Wen Liu
Life of this patent
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Abstract
Fluoropolyether compounds that can be used as a lubricant, such as for magnetic recording media. The compounds have a terminal group that includes a phenol or benzene. The fluoropolyether compounds reduce the head to media distance while keeping comparable reliability in a hard disk drive compared to current industrial widely used fluoropolyether based lubricants.
Claims13
A fluoropolyether compound having the formula (1):
- A-OH2C—p(F2C)—O—R1—(CF2)p—CH2O—CH2CH(OH)CH2—OCH2—(CF2)p—R1—O—(CF2)p—CH2O—B (1)
- where:
- R1 is —(CF2O)x(CF2CF2O)y(CF2CF2CF2O)z(CF2CF2CF2CF2O)w—, with x=4, y=0 and w=0;
- p is any integer within the range of 0 to 4;
- and
- A and B are independently represented by formula (2):
- where:
- R is a C1-10 alkyl group, or an alkoxy group;
- and
- n is 1 or 2.
7 more elements
An apparatus comprising:
- a substrate;
- a magnetic layer on the substrate for magnetic recording
- a protective overcoat layer protecting the magnetic layer;
- and
- a lubricant layer over the protective overcoat layer, the lubricant comprising a compound of formula (1):
- A-OH2C—p(F2C)—O—R1—(CF2)p—CH2O—CH2CH(OH)CH2—OCH2—(CF2)p—R1—O—(CF2)p—CH2O—B (1)
- where:
- R1 is —(CF2O)x(CF2CF2O)y(CF2CF2CF2O)z(CF2CF2CF2CF2O)w—, with x=4, y=0 and w=0;
- p is any integer within the range of 0 to 4;
- and
- A and B are independently represented by formula (2):
- where:
- R is a C1-10 alkyl group, or an alkoxy group;
- and
- n is 1 or 2.
12 more elements
Dependencies are inferred from the claim text.