Hydraulic working oil composition for buffers

Details Hydraulic working oil composition for buffers Hydraulic working oil composition for buffers

1995-03-20

1996-08-27

Medley, Margaret

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

Organic components

252 76, 252 783, 252 785, C09K 500

Patent

active

055498388

ABSTRACT:
A hydraulic working oil composition for buffers which comprises:
a lubricating oil as a base oil,
[I] at least one phosphorus-containing compound selected from the group consisting of a phosphoric acid having a specific structure and a phosphorous acid ester having a specific structure, and
[II] at least one nitrogen-containing compound selected from the group consisting of an alkyleneoxide adduct of an aliphatic monoamine having a specific structure, an aliphatic polyamine having a specific structure and a salt of the above aliphatic polyamine having a specific structure, and
[III] an aliphatic monoamine having a specific structure, the components [I] to [III] being essential components added to said base oil in a predetermined ratio; and a process for lubricating buffers with said hydraulic working oil composition.

REFERENCES:
patent: 3090758 (1963-05-01), Lonstrup et al.
patent: 3203904 (1965-08-01), Brown
patent: 3280029 (1966-10-01), Waldmann
patent: 3645903 (1972-02-01), Stram et al.
patent: 4543199 (1985-09-01), Kuntschik et al.
patent: 4548726 (1985-10-01), Morris-Sherwood et al.
patent: 4795583 (1989-01-01), Papy
patent: 5320768 (1994-06-01), Gutierrez et al.
patent: 5382374 (1995-01-01), Takemitsu et al.
Abstract JP-05255683-, Naoto.

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