Hydroxyethyloxymethyl terminated perfluoropolyethers for lubrication of discs in information storage systems
US6190749A · kind A · utility
7Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1998 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Dec 4, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3154
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An information storage system including a perfluoropolyether lubricant having hydroxyethyloxymethyl terminated endgroups on the surface of a rigid storage medium is provided. In the subject invention, the perfluoropolyether lubricant has the general repeat formula of: HO.sub.p (CH.sub.2 --CH.sub.2 O)CH.sub.2 --Z--CH.sub.2 (OCH.sub.2 --CH.sub.2).sub.p OH where Z is --CF.sub.2 --(OC.sub.2 F.sub.4).sub.m --(CF.sub.2).sub.n --OCF.sub.2 --, p has an average value of 1.5, the ratio of m to n is approximately 1.0, and the mean molecular weight of the lubricant is in the range of approximately 2000 to 6000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.