Perfluoropolyether derivatives, and lubricants and magnetic reco

Details Perfluoropolyether derivatives, and lubricants and magnetic reco Perfluoropolyether derivatives, and lubricants and magnetic reco

1995-05-03

1996-07-16

Willis, Jr., Prince

Compositions

Magnetic

252 34, 252 546, 252 58, 252 6255, 252 6254, 252 6256, 428694TF, 428694TB, 562586, 508510, 508517, C07C 59115, C10M10524, H01F 1008

Patent

active

055364250

ABSTRACT:
Novel perfluoropolyether derivatives are described which are obtained from perfluoropolyethers having a carboxyl group at one or both ends and monoamines or diamines. The derivative is useful as a lubricant owing to its significantly improved lubricity. The lubricity is shown under severe high or low temperature and humidity conditions over a long term. The derivative is especially useful as a lubricant for magnetic recording mediums of the coating and metal thin film types.

REFERENCES:
patent: 5091249 (1992-02-01), Nishikawa et al.
patent: 5091269 (1992-02-01), Kondo et al.
patent: 5453539 (1995-09-01), Kondo et al.
Database WPIL Derwent Publications, Ltd., London GB; AN 89-057007 (08), JP-A-1 008 506 (Sony Corp.) Dec. 1989.
Database WPIL Derwent Publications, Ltd., London GB; AN 89-057715 (08), JP-A-1 009 961 (Sony Corp.), Abstract Jan. 1989.
Database WPIL Derwent Publications, Ltd., London GB; AN 91-374190 (51), JP-A-3 252 921 (Sony Corp.), Abstract Dec. 1991.
Database WPIL Derwent Publications, Ltd., London GB; AN 92-076915, JP-A-4 021 922 (Hitachi KK), Abstract Jan. 1992.

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