US 12,227,713 B2
Polysiloxane hydraulic fluids
Mathew John Ballard, Oakleigh East (AU); Philip Stephen Casey, Heathmont (AU); Susan Wan-Yi Holmes, Murrumbeena (AU); Cameron David Way, Heathmont (AU); Kevin Norman Winzenberg, Camberwell (AU); and James Hull, Seattle, WA (US)
Assigned to THE BOEING COMPANY, Arlington, VA (US); and COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION, Acton (AU)
Filed by THE BOEING COMPANY, Arlington, VA (US); and Commonwealth Scientific and Industrial Research Organisation, Acton (AU)
Filed on Apr. 11, 2022, as Appl. No. 17/717,647.
Application 17/717,647 is a continuation of application No. 16/300,579, granted, now 11,299,688, issued on Apr. 12, 2022, previously published as PCT/AU2017/050435, filed on May 11, 2017.
Claims priority of provisional application 62/334,555, filed on May 11, 2016.
Prior Publication US 2023/0323233 A1, Oct. 12, 2023
Prior Publication US 2025/0011671 A9, Jan. 9, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. C10M 107/50 (2006.01); C10M 107/48 (2006.01); C10M 137/12 (2006.01); C10N 30/02 (2006.01); C10N 30/04 (2006.01); C10N 30/08 (2006.01); C10N 40/08 (2006.01)
CPC C10M 107/50 (2013.01) [C10M 107/48 (2013.01); C10M 137/12 (2013.01); C10M 2223/0603 (2013.01); C10M 2229/0425 (2013.01); C10N 2030/02 (2013.01); C10N 2030/04 (2013.01); C10N 2030/08 (2013.01); C10N 2040/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic fluid composition comprising a polysiloxane compound and a non-halogenated diphosphonate compound, wherein the polysiloxane compound is represented by a compound of Formula 1:

OG Complex Work Unit Chemistry
wherein:
y is an integer selected from 1 to 40;
R1, R2, R3, and R4 are each independently selected from the group consisting of C1-10alkyl, aryl, and C1-10alkylaryl;
each R5 and each R6 is independently selected from the group consisting of C1-10alkyl, aryl, and C1-10alkylaryl;
at least one of R1 to R4 or at least one of R5 and R6 of at least one of the y units is C1-10alkylaryl; and
the polysiloxane compound has a mol % of aryl moieties of about 15 mol % to about 35 mol %, relative to silicon.