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1. (WO2011156129) FLUIDES HYDRAULIQUES À BASE DE SILICONE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

1. A composition comprising:

(A) 2 to 99 parts of at least one polydiorganosiloxane selected from

(Al) 0 to 99 parts of a polydiorganosiloxane having a formula

R'R2Si-0(Me2SiO)wSiR2R' having a viscosity of 1.00 x 10"6 m2/s to 1.00 x 10"4 m2/second at 25° C, and

(A2) 0 to 99 parts having a formula R'R2Si-0(Me2SiO)x(MeRaSi<¾SiR2R' having a viscosity of 1.00 x 10"5 m2/s to 1.00 x 10"4 m2/s at 25° C, wherein Me represents the methyl group, each R represents a monovalent group selected from hydrocarbon groups containing from 1 to 6 carbon atoms, and halogenated hydrocarbon groups containing from 1 to 6 carbon atoms, each R' represents a group selected from R groups, the hydride group, and the hydroxy group, w has an average value from 1 to 70, each Ra represents an aryl hydrocarbon group having from 6 to 10 carbon atoms, x has an average value from 5 to 50,

and y has an average value from 0.5 to 6;

(B) 0.9 to 60 parts by weight of a chlorendate diester having the formula

R"02CQC02R", wherein -02C-QC02- represents the chlorendate residue,

CI o

I II

Cl-C-C CHC-O- I

CC12

I

Cl-C-C CHC-0- 1 II

CI o

each R" represents a group selected from alkyl groups containing from 4 to 10 carbon atoms and the tetrahydrofurfuryl group; and

(C) 0.1 to 38 parts by weight of a lubricant compound selected from N,N-dialkyldithiocarbamates of lead and antimony and dialkylphosphorodithioates of lead and antimony, the total parts of (A) plus (B) plus (C) being 100 parts by weight.

2. The composition of claim 1 wherein component (A) comprises at least two polydiorganosiloxanes selected from (Al) 1 to 99 parts of a polydiorganosiloxane having a formula R'R2Si-0(Me2SiO)wSiR2R' and a viscosity of 1.00 x 10"6 m2/s to 1.00 x 10"4 m /second at 25° C and (A2) 1 to 99 parts of a polydiorganosiloxane having a formula R'R2Si-0(Me2SiO)x(MeRaSiO)3,SiR2R', wherein Me represents the methyl group, each R represents a monovalent group selected from hydrocarbon groups containing from 1 to 6 carbon atoms, and halogenated hydrocarbon groups containing from 1 to 6 carbon atoms, each R' represents a group selected from R groups, the hydride group, and the hydroxy group, w has an average value from 1 to 70, each Ra represents an aryl hydrocarbon group having from 6 to 10 carbon atoms, x has an average value from 5 to 50, and y has an average value from 0.5 to 6

3. The composition of Claim 1 or 2 where R is methyl, R' is methyl, Ra is phenyl, R" is 2-ethylhexyl, R" ' is propyl, w has an average value from 3 to 35, x has an average value of from 11 to 37, y has an average value of 3 to 4, 30 to 40 parts of Component (Al) having a viscosity of 5.00 x 10"6 m2/second to 3.00 x 10"5 m2/second at 25° C, 50 to 60 parts of

Component (A2) having a viscosity of 2.00 x 10 -"5 m 2 /second to 5.00 X 10 -"5 m 2 /second at 25° C, 4.5 to 10 parts of Component (B), 0.5 to 10 parts of Component (C) where component (C) is a dipropylphosphorodithioate.

4. In a process of transmitting power from one place to another place via a hydraulic fluid, the improvement which comprises using as the hydraulic fluid the composition of claim 1, 2 or 3.