US3098825A - Non-corrosive hydraulic fluids - Google Patents
Non-corrosive hydraulic fluids Download PDFInfo
- Publication number
- US3098825A US3098825A US751145A US75114558A US3098825A US 3098825 A US3098825 A US 3098825A US 751145 A US751145 A US 751145A US 75114558 A US75114558 A US 75114558A US 3098825 A US3098825 A US 3098825A
- Authority
- US
- United States
- Prior art keywords
- alkaline
- hydraulic
- fluids
- csi
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 title claims description 68
- 230000009972 noncorrosive effect Effects 0.000 title claims description 7
- 239000000203 mixture Substances 0.000 claims description 45
- 239000003112 inhibitor Substances 0.000 claims description 31
- 238000005260 corrosion Methods 0.000 claims description 26
- 230000007797 corrosion Effects 0.000 claims description 26
- 150000003377 silicon compounds Chemical class 0.000 claims description 22
- 150000005846 sugar alcohols Polymers 0.000 claims description 16
- 150000002170 ethers Chemical class 0.000 claims description 14
- -1 ferrous metals Chemical class 0.000 description 39
- 238000012360 testing method Methods 0.000 description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 18
- 150000001298 alcohols Chemical class 0.000 description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 16
- 229910052710 silicon Inorganic materials 0.000 description 16
- 239000010703 silicon Substances 0.000 description 13
- 125000004432 carbon atom Chemical group C* 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 150000001875 compounds Chemical class 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000002585 base Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 125000003118 aryl group Chemical group 0.000 description 8
- 239000002244 precipitate Substances 0.000 description 8
- 238000010186 staining Methods 0.000 description 8
- 125000000217 alkyl group Chemical group 0.000 description 7
- 239000004359 castor oil Substances 0.000 description 7
- 235000019438 castor oil Nutrition 0.000 description 7
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 7
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 7
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 6
- 239000003963 antioxidant agent Substances 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 6
- 229910052605 nesosilicate Inorganic materials 0.000 description 6
- 150000004762 orthosilicates Chemical class 0.000 description 6
- 229910052700 potassium Inorganic materials 0.000 description 6
- 239000011591 potassium Substances 0.000 description 6
- 150000004760 silicates Chemical class 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- OLLFKUHHDPMQFR-UHFFFAOYSA-N dihydroxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](O)(O)C1=CC=CC=C1 OLLFKUHHDPMQFR-UHFFFAOYSA-N 0.000 description 5
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 5
- 150000002334 glycols Chemical class 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 150000004819 silanols Chemical class 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- FHVAUDREWWXPRW-UHFFFAOYSA-N triethoxy(pentyl)silane Chemical compound CCCCC[Si](OCC)(OCC)OCC FHVAUDREWWXPRW-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000003078 antioxidant effect Effects 0.000 description 4
- 229910021538 borax Inorganic materials 0.000 description 4
- 150000001768 cations Chemical class 0.000 description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 description 4
- 239000003085 diluting agent Substances 0.000 description 4
- FSTSIHBJBSLSQV-UHFFFAOYSA-N ethyl 3-triethoxysilylpropanoate Chemical compound CCOC(=O)CC[Si](OCC)(OCC)OCC FSTSIHBJBSLSQV-UHFFFAOYSA-N 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 4
- 229920001451 polypropylene glycol Polymers 0.000 description 4
- 159000000000 sodium salts Chemical class 0.000 description 4
- 235000010339 sodium tetraborate Nutrition 0.000 description 4
- 125000001424 substituent group Chemical group 0.000 description 4
- NLSXASIDNWDYMI-UHFFFAOYSA-N triphenylsilanol Chemical compound C=1C=CC=CC=1[Si](C=1C=CC=CC=1)(O)C1=CC=CC=C1 NLSXASIDNWDYMI-UHFFFAOYSA-N 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 150000005840 aryl radicals Chemical class 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 125000000853 cresyl group Chemical group C1(=CC=C(C=C1)C)* 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- 125000003698 tetramethyl group Chemical group [H]C([H])([H])* 0.000 description 3
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 3
- GDXHBFHOEYVPED-UHFFFAOYSA-N 1-(2-butoxyethoxy)butane Chemical compound CCCCOCCOCCCC GDXHBFHOEYVPED-UHFFFAOYSA-N 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 150000001346 alkyl aryl ethers Chemical class 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 2
- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000004328 sodium tetraborate Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 125000003944 tolyl group Chemical group 0.000 description 2
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 2
- LEEANUDEDHYDTG-UHFFFAOYSA-N 1,2-dimethoxypropane Chemical compound COCC(C)OC LEEANUDEDHYDTG-UHFFFAOYSA-N 0.000 description 1
- QWOZZTWBWQMEPD-UHFFFAOYSA-N 1-(2-ethoxypropoxy)propan-2-ol Chemical compound CCOC(C)COCC(C)O QWOZZTWBWQMEPD-UHFFFAOYSA-N 0.000 description 1
- ZNRLMGFXSPUZNR-UHFFFAOYSA-N 2,2,4-trimethyl-1h-quinoline Chemical compound C1=CC=C2C(C)=CC(C)(C)NC2=C1 ZNRLMGFXSPUZNR-UHFFFAOYSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- QCDWFXQBSFUVSP-UHFFFAOYSA-N 2-phenoxyethanol Chemical compound OCCOC1=CC=CC=C1 QCDWFXQBSFUVSP-UHFFFAOYSA-N 0.000 description 1
- 125000004203 4-hydroxyphenyl group Chemical group [H]OC1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 244000233967 Anethum sowa Species 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical class [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- KEQFTVQCIQJIQW-UHFFFAOYSA-N N-Phenyl-2-naphthylamine Chemical compound C=1C=C2C=CC=CC2=CC=1NC1=CC=CC=C1 KEQFTVQCIQJIQW-UHFFFAOYSA-N 0.000 description 1
- 101100409308 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) adv-1 gene Proteins 0.000 description 1
- 206010073261 Ovarian theca cell tumour Diseases 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- DHXVGJBLRPWPCS-UHFFFAOYSA-N Tetrahydropyran Chemical compound C1CCOCC1 DHXVGJBLRPWPCS-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- FZQSLXQPHPOTHG-UHFFFAOYSA-N [K+].[K+].O1B([O-])OB2OB([O-])OB1O2 Chemical compound [K+].[K+].O1B([O-])OB2OB([O-])OB1O2 FZQSLXQPHPOTHG-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 125000004104 aryloxy group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- DAKRXZUXJUPCOF-UHFFFAOYSA-N diethyl(dihydroxy)silane Chemical compound CC[Si](O)(O)CC DAKRXZUXJUPCOF-UHFFFAOYSA-N 0.000 description 1
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 1
- RBSBUSKLSKHTBA-UHFFFAOYSA-N dihydroxy-methyl-phenylsilane Chemical compound C[Si](O)(O)C1=CC=CC=C1 RBSBUSKLSKHTBA-UHFFFAOYSA-N 0.000 description 1
- VFUGMTAIQWBRCM-UHFFFAOYSA-N dihydroxy-methyl-trimethylsilyloxysilane Chemical compound C[Si](C)(C)O[Si](C)(O)O VFUGMTAIQWBRCM-UHFFFAOYSA-N 0.000 description 1
- XCLIHDJZGPCUBT-UHFFFAOYSA-N dimethylsilanediol Chemical compound C[Si](C)(O)O XCLIHDJZGPCUBT-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- CWAFVXWRGIEBPL-UHFFFAOYSA-N ethoxysilane Chemical compound CCO[SiH3] CWAFVXWRGIEBPL-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical class CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- DRXHEPWCWBIQFJ-UHFFFAOYSA-N methyl(triphenoxy)silane Chemical compound C=1C=CC=CC=1O[Si](OC=1C=CC=CC=1)(C)OC1=CC=CC=C1 DRXHEPWCWBIQFJ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- UWJJYHHHVWZFEP-UHFFFAOYSA-N pentane-1,1-diol Chemical class CCCCC(O)O UWJJYHHHVWZFEP-UHFFFAOYSA-N 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- KCIKCCHXZMLVDE-UHFFFAOYSA-N silanediol Chemical compound O[SiH2]O KCIKCCHXZMLVDE-UHFFFAOYSA-N 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 208000001644 thecoma Diseases 0.000 description 1
- DENFJSAFJTVPJR-UHFFFAOYSA-N triethoxy(ethyl)silane Chemical compound CCO[Si](CC)(OCC)OCC DENFJSAFJTVPJR-UHFFFAOYSA-N 0.000 description 1
- 150000004072 triols Chemical class 0.000 description 1
- WUUHFRRPHJEEKV-UHFFFAOYSA-N tripotassium borate Chemical compound [K+].[K+].[K+].[O-]B([O-])[O-] WUUHFRRPHJEEKV-UHFFFAOYSA-N 0.000 description 1
- SOBHUZYZLFQYFK-UHFFFAOYSA-K trisodium;hydroxy-[[phosphonatomethyl(phosphonomethyl)amino]methyl]phosphinate Chemical compound [Na+].[Na+].[Na+].OP(O)(=O)CN(CP(O)([O-])=O)CP([O-])([O-])=O SOBHUZYZLFQYFK-UHFFFAOYSA-K 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0834—Compounds having one or more O-Si linkage
- C07F7/0838—Compounds with one or more Si-O-Si sequences
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M3/00—Liquid compositions essentially based on lubricating components other than mineral lubricating oils or fatty oils and their use as lubricants; Use as lubricants of single liquid substances
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- C—CHEMISTRY; METALLURGY
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
Definitions
- This invention relates to fluid compositions, and particularly to alkaline inhibited hydraulic fluids which effectively prevent corrosion and staining of non-ferrous metals and which have the advantage of remaining essentially free of precipitation in hydraulic systems adapted for the transfer of mechanical energy. More particularly the invention relates to new and improved alkaline inhibited hydraulic fluids comprising alcohols, alcohol ethers, mixtures of alcohols and ethers, and silicon compounds which contain the CSi bond.
- hydraulic fluid compositions have been suggested for use in mechanisms adapted for the transfer of mechanical energy, typical of :which are hydraulic brake systems, recoil devices, shock absorbers, and the like.
- various hydraulic fluids which are already known in the art are the so-called alkaline inhibited compositions which comprise alcohols, alcohol ethers, or mixtures of both, and an alkaline corrosion inhibitor such as sodium borate, potassium borate or sodium hydroxide, etc.
- alkaline inhibited compositions which comprise alcohols, alcohol ethers, or mixtures of both
- an alkaline corrosion inhibitor such as sodium borate, potassium borate or sodium hydroxide, etc.
- alkaline inhibitor materials have been employed in hydraulic fluids for preventing corrosion of ferrous metals in hydraulic systems. While fluids of this type may be suitable for use in hydraulic systems embodying ferrous metals, such hydraulic fluids, however, are frequently corrosive to aluminum as well as other non-ferrous metals such as brass and copper.
- the alkaline inhibitors are believed responsible for producing aluminum stain, apparently aluminum oxide produced by the action of aqueous alkaline solutions, which iscause for rejection when the fluid is tested according to Federal Specification VVF45 la Corrosion Test.
- alkaline inhibited hydraulic fluids refers to fluids comprising one or more compounds from thefclass of alcohols, alcohol ethers, mixtures of such alcolipls and ethers, together with an alkaline inhibitor material in an amount sufiicient to create a pH value of from about 7.0 to 11.5 in the formulated fluids.
- silicon compounds which possess the CSi bond are effective corrosion inhibitors when used in admixture with alkaline inhibited fluids.
- Numerous compounds are operative within the broader scope of the invention including, for example, CSi bonded silanols, silicates, and salt compounds.
- the defined silicon compounds When blended with alkaline inhibited hydraulic fluids, the defined silicon compounds provide hydraulic compositions which eifectively inhibit corrosion and discoloration of non-ferrous metals such as aluminum, brass and copper, and, in addition, show good stability with substantially no tendency to form precipitates for extended periods of time during storage and use.
- R is a monovalent hydrocarbon radical
- R can be a hydrogen, aryl, or alkyl group containing from about 1 to 18 carbon atoms or a cation selected [from the group consisting of sodium, potassium and ammonium
- x is a member selected fromthe group of R and OR.
- a represents a value of l, 2 or '3
- b and 0 represent a value of 0, l or 2
- d represents a value of 0 or 1
- e represents a value of 1 or 2.
- the silicon compounds contemplated within the scope of the formula possess at least one carbon atom bonded to eachv silicon atom with at least one OR group per molecule.
- the preferred compounds contain up to about .13 0 carbon atoms to the molecule.
- alkyl and aryl groups represented by R are branched and straight chain alkyl groups such as methyl, ethyl, propyl, butyl, amyl, octyl, decyl, undecyl, dodecyl, Z-ethylbutyl, Q-methylpenty-l, Z-ethylhexyl, etc., and substituted or unsubstituted aryl groups such as tolyl, phenyl and cresyl, etc.
- the monovalent' hydrocarbon radicals represented by R include aliphatic and aryl groups, as above described, as Well as carbalkoxyalkyl groups, such as carbethoxyethyl, wherein the al-koxy and alkyl groups, each, may contain from about 1 to 18 carbon atoms.
- the groups represented by R and R may be alike or diiferent.
- Preferred silanol compounds encompassed within the scope of the above formula include triphenylsilanol and the silanediols such as dipheny-l silanediol, dimethyl silane diol, diethyl silanediol, methylphenyl silanediol, tetramethyl disiloxanediol-1,3 and other silancdiols which contain aryl and/or alkyl substituents occupying the 1, 2, or 3 positions on each silicon atomwith the remaining valences being satisfied with hydroxyl groups.
- silanediols such as dipheny-l silanediol, dimethyl silane diol, diethyl silanediol, methylphenyl silanediol, tetramethyl disiloxanediol-1,3 and other silancdiols which contain aryl and/or alkyl substituents occupying the 1, 2, or 3
- the substituent group may consist of methyl, ethyl, propyl, butyl, octyl, decyl, tolyl, phenyl, cresyl, or a carbalkoxy-substituted hydrocarbon group.
- silicate compounds falling within the scope of the above formula the trialkoxy or triaryloxy compounds are preferred.
- examples of such compounds include methyl triethoxysilane, ethyl triethoxysilane, dimethyl tetra-2- ethylhexoxy disiloxane, phenyl triethoxysilane, methyl triphenoxysilane, beta-carbethoxyethyl triethoxysilane, as Well as other CSi bonded silicates which contain substituent groups occupying the l, 2 or 3 positions on each silicon atom, as above described, with the remaining valences being occupied by ester groups.
- the preferred CSi bonded silicon salt compounds are the mono-, di-, or trisodium, potassium or ammonium salts of methyl, ethyl, propyl, butyl, amyl, phenyl, cresyl, etc., siloxanes.
- CSi bonded silanols, silicates and salt compounds can be used alone or in combination for the.
- compositions prepared in accordance with this invention are the alkaline inhibited hydraulic fluids which contain one or more compounds from the class of alcohols, alcohol ethers, mixtures of such alcohols and Weight percent Lubricant 15 to 35 Dilucnt 65 to 85 Antioxidant to 2 Alkaline inhibitor 0.1 to 2 Silicon compound 0.0001 to 1.0
- the lubricant portion contains one or more polyhydric alcohols or polyhydric alco'hol ethers including polyethers, or a mixture of polyhydric alcohols and ethers, all preferably having average molecular weights of at least 300 as a minimum.
- the lubricant can also contain, as modifiers, esters and polyesters of polyhydric alcohols; reaction products of alkylene oxides and polyfunctional amines, e.g., polyalkylene .polyamines; ethanolarnines and the like; castor oil; blown castor oil, i.e., castor oil which is polymerized by air oxidation; bodied castor oil, i.e., castor oil which is polymerized by heat alone; acetylated oastor oil; glycol modified castor oil, and the like, or mixtures thereof.
- reaction products of alkylene oxides and polyfunctional amines e.g., polyalkylene .polyamines; ethanolarnines and the like
- castor oil blown castor oil, i.e., castor oil which is polymerized by air oxidation
- bodied castor oil i.e., castor oil which is polymerized by heat alone
- acetylated oastor oil
- the diluent portion acts as a solvent permitting adjustments to the composition viscosity, as desired, and can comprise one or more monohydric alcohols or dihydric alcohol monoethers or mixtures thereof and can contain from 0 to 50 weight percent dihydric alcohols all of which have average molecular weights below about 300.
- any suitable method can be used in preparing our hydraulic liquid compositions.
- the components can be added together or one at a time in any desired sequence. It is preferable, however, to add the antioxidant and alkaline inhibitor as a solution in the alcohol component. It is also preferable to warm this solution during its preparation in order to facilitate dissolution. All components are mixed until a single phase composition is obtained.
- polyhydric alcohols which can be used in the fluid compositions are the alkylene glycols, ie.g., ethylene glycol, propylene glycol, the bntanediols, the pentanediols, the hexanediols and the like, the polyoxyalkylene glycols such as polyoxyethylene glycols, polyoxypropylene glycols, polyoxybutylene glycols and the like, mixed polyoxyalkylene glycols, e.g., polyoxythylenepolyoxypropylene glycols, and polyoxyalkylene triols.
- alkylene glycols ie.g., ethylene glycol, propylene glycol, the bntanediols, the pentanediols, the hexanediols and the like
- polyoxyalkylene glycols such as polyoxyethylene glycols, polyoxypropylene glycols, polyoxy
- polyhydric alcohol ethers are the alkyl and aryl monoethers, diethers and triethers of polyhydric alcohols such as those specified above.
- polyhydric alcohol ethers are ethylene glycol monomethyl ether, dipropylene glycol monoethyl ether, polyoxyethylene glycol monophenyl ether and the like, ethylene glycol dibutyl ether, propylene glycol dimethyl ether, polyoxypropylene glycol dibutyl ether and the like.
- antioxidants and alkaline inhibitors are well known materials.
- Typical antioxidants include phenolic compounds, such as 2,2-di-(4-hydroxyphenyl)propane and polymerized trimethyldihydroquinoline and the like, aminessuch as phenyl alpha-naphthylarnine and .phenyl beta-naphthylamine, and the like, as well as hindered phenols and the like.
- Alkaline inhibitor materials which can be employed in an amount sufficient to maintain alkaline conditions in the fluid composition, i.e. a pH value of from about 7.0 to 11.5, include alkali metal hydroxides, e.g. potassium hydroxide, sodium hydroxide,
- alkali metal borates e.g. sodium borate, potassium.
- nitrites such as morpholine, ethanolamine, triethanolamine, etc.
- amine salts such as, for example, the monoor dibutyl ammonium bora-tes and phosphates.
- Organic orthosilicate i.e., organo-si-licon compounds characterized by only alkoxy or only aryloxygroups attached to a single silicon atom or to groups of silicon atoms interconnected by silicon to oxygen to silicon bonds, have been used heretofore in heat transfer fluids and their use as inhibitors in brake fluids is described in copending application, Serial Number 633,178, filed January 9, 1957, now abandoned.
- Freshly prepared hydraulic fluids thus inhibited show a beneficial effect with respect to metal staining as well as a lack of precipitation in corrosion tests at 212 F. and in Federal Specification VVF-45 1a Water Tolerance Tests at 140 F.
- organic orthosilicates such as ethyl silicate eventually precipitate due to small amounts of water inevitably present in any hydraulic system which hydrolyze the silicate to insoluble silica or condensed silica polymers.
- orthosili'cate-inhibited fluids after being stored for extended periods of time, especially in tin-lined containers, such as those ordinarily used to package fluids, are subject to failure in the Water Tolerance Test due to metal contaminants, soldered seams, etc, which have a pronounced effect in promoting and accelerating the rate and degree of precipitation.
- the hydraulic fluids remain essentially free of precipitation overextended periods of time by virtue of such compounds being substantially resistant to hydrolysis and polymerization.
- the substituent groups apparently act as hindering groups which retard the rate of hydrolysis and polymerization, or as solubilizing groups in the event that polymerization occurs.
- diphenylsilanediol possesses only two reactive groups, as opposed to the four reactive substituent groups on ethyl silicate through which polymerization can proceed.
- the CSi bonded silicon corrosion inhibitors defined herein differ widely from the organic orthosilicates.
- EXAMPLE 1 Ethylene glycol monobutyl ether 33.75 Diethylene glycol mo-noethyl ether 25.49 Ethylene glycol 8.26
- this base fluid mixture 0.5 part by weight of 2,2-di-(4-hydroxyphenyl)pro1:1ane as antioxidant and 0.5 part by weight of borax, i.e., sodium tetraborate (Na B O -5H O), as alkaline inhibitor were added.
- borax i.e., sodium tetraborate (Na B O -5H O)
- the antioxidant and alkaline inhibitors were first dissolved at a temperature of 70 C. to 100 C. in the ethylene glycol and the resulting solution was then introduced into the remainder of the mixture.
- EXAMPLE 2 To 100 parts by weight of the alkaline inhibited mixture of the fluids prepared in Example 1, eight hydraulic liquid compositions were formulated which contained the fol lowing CSi bonded silicon inhibitors.
- EXAMPLE 3 An alkaline inhibited base fluid containing the following materials was prepared. Polyoxyethylene-polyoxypropylene glycol monobutyl ether (2000 S.U.S. at 25 C.)
- Example 3 To 100 parts by weight of the alkaline inhibited mixture of the fluid prepared in Example 3, two hydraulic fluid compositions were formulated, one of which contained .005 part by Weight of diphenylsilanediol and the other .005 part by weight of methyl triethoxysilane.
- the hydraulic fluid compositions were prepared for corrosion testing by incorporating therein five parts by volume of water and each were tested for corrosion with metal strips as indicated above in Example 2.
- the CSi bonded silicon inhibitors substantially eliminated corrosion and staining of all the test strips whereas without the added silicon compound each fluid caused corrosion and staining of the metals.
- EXAMPLE 4 An alkaline inhibited base fluid containing the following materials was prepared. Polyoxyethylene-polyoxypropylene glycol monobutyl ether (260 S.U.S. at 26 C.)
- EXAMPLE 6 Table I below illustrates a direct comparison between 1 the hydrolytic stability of alkaline inhibited hydraulic fluids containing organic orthosilicates and the CSi bonded silicon inhibitors of the invention.
- the coma temperature 140:3 F. and held at that temperature to the point of failure. Failure of the test occurs when the hydraulic fluids show precipitation, separation, sedimentation, or crystallization. This test demonstrates the relative resistance of the organic orthosilicate and the CSi bonded silicon-containing fluids of this invention to hydrolysis and polymerization which results in precipitation.
- the fluids containing organic orthosilicates i.e., ethylsilicate or hexa-2-ethylbutoxydisiloxane formed heavy precipitates.
- the fluids containing the CSi bonded silicon inhibitors were free of precipitates.
- x is a member selected from the group consisting of R and OR;
- a represents a value of 1 to 3', b and c represent a value of 0 to 2;
- d represents a value of 0 to 1; and 2 represents a value of 1 to 2, said silicon compound being present in an amount sufficient to eifectively inhibit corrosion.
- a non-corrosive hydraulic brake fluid composition consisting essentially of a lubricant selected from the group consisting of polyhydric alcohols and polyhydric alcohol ethers and mixtures thereof, said alcohols and ethers having a minimum average molecular weight of at least 300, and a diluent selected from the group consisting of dihydric alcohols and the manoalkyl ethers of dihydric alcohols, said dihydric alcohols and ethers having average molecular weights of below 300; an alkaline inhibitor suificient to provide a pH value of from about 7.0 to 11.5, and as a corrosion inhibitor, from about Table II WATER TOLERANCE TESTS (3%% ADDED WATER), ONE DAY AT 140 F WITH INHIBITED BRAKE FLUIDS Inhibitors Base fluid of Base fluid of Ex. 4
- a non-corrosive hydraulic brake fluid composition consisting essentially of a hydraulic fluid selected from the group consisting of polyhydric alcohols, polyhydric alcohol ethers and mixtures thereof; an alkaline inhibitor sufiicient to provide a pH value of from about 7.0 to 11.5, and as a corrosion inhibitor therefor a CSi bonded silicon compound of the formula (OR')b Riv-Si 0.0001 to 1.0 percent by Weight of a CSi bonded compound of the formula:
- R is a radical having 1-18 carbon atoms, selected from the group consisting of alkyl, aryl and carbalkoxyalkyl; R is a member selected from the group consisting of hydrogen, alkyl radicals having 1-18 carbon-atoms, aryl radicals having 618 carbon atoms, and cations selected from the group consisting of sodium, potassium and ammonium;
- x is a member selected from the group consisting of R and OR; a represents a value of 1 to 3; b and c represent a value of 0 to 2; d represents a value of 0 to 1; and e represents a value of 1 to 2.
- a non-corrosive hydraulic brake fluid composition consisting essentially of 15 to 35 weight percent of a lubricant selected from the group consisting of polyhydric alcohols, polyhydric alcohol ethers and mixtures thereof, said alcohols and ethers having a minimum average molecular weight of at least 300; from 65 to weight percent of a diluent selected from the group consisting of dihydric alcohols and the monoalkyl ethers of said dihydride alcohols, having average molecular weights of below 300; an alkaline inhibitor sufliciemt to provide a pH value of firom about 7.0 to 11.5 and as a corrosion inhibitor, a C-Si bonded silicon compound of the formula:
- alias l member selected from the group consisting of R and OR;
- a represents a value of 1 to 3; b and 0 represent a.value of 0 to 2; d represents a value of 0 to 1; made re resents a value of 1 to 2, said silicon compound being present in an amount suflicient to, effectively inhibit corrosion.
- a non-corrosive hydraulic brake fluid composition consisting essentially of 15 to 35 weight percent of a lubricant selected from the group consisting of polyhydric alcohols, polyhydric alcohol ethers and mixtures thereof, said alcohols and others having a minimum average molecular weight of at least 300; from 65 to 85 weight percent of a diluent selected from the group consisting of dihydric alcohols and the monoalkyl ethers of said dihydride alcohols, having average molecular weights of below 300; an alkaline inhibitor sufiicient to provide a pH value of from about 7.0 to 11.5 and as a corrosion inhibitor, from about 0.0001 to 1.0% by weight of a C-Si bonded silicon compound of the formula:
- n represents a value of 0 to 5;
- R is a radical, having 118 carbon atoms, selected from the group consisting of alkyl, aryl, and carbalkoxyalkyl;
- R is a member selected from the group consisting of hydrogen, alkyl radicals having 1-18 carbon atoms, aryl radicals having 6-18 carbon atoms, and cations selected from the group consisting of sodium, potassium and ammonium;
- x is a member selected from the group consisting of R and OR;
- a represents a value of 1 to 3;
- b and 0 represent a value of 0 to 2;
- d represents a value 0 to 1; and e represen a value of 1 to 2.
- the hydraulic brake fluid composition of claim 4 h i th C-Si bonded silicon compound is tetramethyl disiloxanediol.
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Description
3,098,825 NON-CORROSIVE HYDRAULIC FLUIDS Richard W. Shifiler, Pittsburgh, Pa., assignor to Union Carbide Corporation, a corporation of New York No Drawing. Filed July 28, 1958, Ser. No. 751,145 9 Claims. (Cl. 252-78) This invention relates to fluid compositions, and particularly to alkaline inhibited hydraulic fluids which effectively prevent corrosion and staining of non-ferrous metals and which have the advantage of remaining essentially free of precipitation in hydraulic systems adapted for the transfer of mechanical energy. More particularly the invention relates to new and improved alkaline inhibited hydraulic fluids comprising alcohols, alcohol ethers, mixtures of alcohols and ethers, and silicon compounds which contain the CSi bond.
A wide variety of hydraulic fluid compositions have been suggested for use in mechanisms adapted for the transfer of mechanical energy, typical of :which are hydraulic brake systems, recoil devices, shock absorbers, and the like. Among the various hydraulic fluids which are already known in the art are the so-called alkaline inhibited compositions which comprise alcohols, alcohol ethers, or mixtures of both, and an alkaline corrosion inhibitor such as sodium borate, potassium borate or sodium hydroxide, etc. Although hydraulic fluids of this type possess one or more desired characteristics of viscosity-temperature variation, volatility or pour point,
their use has been handicapped to a large extent by the fact that a Wide range of suitable properties cannot be obtained. -F or example, alkaline inhibitor materials have been employed in hydraulic fluids for preventing corrosion of ferrous metals in hydraulic systems. While fluids of this type may be suitable for use in hydraulic systems embodying ferrous metals, such hydraulic fluids, however, are frequently corrosive to aluminum as well as other non-ferrous metals such as brass and copper.
With aluminum, for example, the alkaline inhibitors are believed responsible for producing aluminum stain, apparently aluminum oxide produced by the action of aqueous alkaline solutions, which iscause for rejection when the fluid is tested according to Federal Specification VVF45 la Corrosion Test.
As used herein, the term alkaline inhibited hydraulic fluids refers to fluids comprising one or more compounds from thefclass of alcohols, alcohol ethers, mixtures of such alcolipls and ethers, together with an alkaline inhibitor material in an amount sufiicient to create a pH value of from about 7.0 to 11.5 in the formulated fluids.
In accordance with this invention it has been found that small amounts of silicon compounds which possess the CSi bond are effective corrosion inhibitors when used in admixture with alkaline inhibited fluids. Numerous compounds are operative within the broader scope of the invention including, for example, CSi bonded silanols, silicates, and salt compounds. When blended with alkaline inhibited hydraulic fluids, the defined silicon compounds provide hydraulic compositions which eifectively inhibit corrosion and discoloration of non-ferrous metals such as aluminum, brass and copper, and, in addition, show good stability with substantially no tendency to form precipitates for extended periods of time during storage and use.
United States Patent The silicon compounds used in accordance with the invention are represented by the formula:
)b I l R )d 1 R,,S1 0-8: -a:
(c R), L 1'1, n wherein n represents a value of 0 to 5 R is a monovalent hydrocarbon radical; R can be a hydrogen, aryl, or alkyl group containing from about 1 to 18 carbon atoms or a cation selected [from the group consisting of sodium, potassium and ammonium; and x is a member selected fromthe group of R and OR. In the formula, a represents a value of l, 2 or '3; b and 0 represent a value of 0, l or 2; d represents a value of 0 or 1, and e represents a value of 1 or 2. The silicon compounds contemplated within the scope of the formula possess at least one carbon atom bonded to eachv silicon atom with at least one OR group per molecule. The preferred compounds contain up to about .13 0 carbon atoms to the molecule. Examples of alkyl and aryl groups represented by R are branched and straight chain alkyl groups such as methyl, ethyl, propyl, butyl, amyl, octyl, decyl, undecyl, dodecyl, Z-ethylbutyl, Q-methylpenty-l, Z-ethylhexyl, etc., and substituted or unsubstituted aryl groups such as tolyl, phenyl and cresyl, etc. The monovalent' hydrocarbon radicals represented by R include aliphatic and aryl groups, as above described, as Well as carbalkoxyalkyl groups, such as carbethoxyethyl, wherein the al-koxy and alkyl groups, each, may contain from about 1 to 18 carbon atoms. The groups represented by R and R may be alike or diiferent.
Preferred silanol compounds encompassed within the scope of the above formula include triphenylsilanol and the silanediols such as dipheny-l silanediol, dimethyl silane diol, diethyl silanediol, methylphenyl silanediol, tetramethyl disiloxanediol-1,3 and other silancdiols which contain aryl and/or alkyl substituents occupying the 1, 2, or 3 positions on each silicon atomwith the remaining valences being satisfied with hydroxyl groups. The substituent group may consist of methyl, ethyl, propyl, butyl, octyl, decyl, tolyl, phenyl, cresyl, or a carbalkoxy-substituted hydrocarbon group.
For silicate compounds (falling within the scope of the above formula the trialkoxy or triaryloxy compounds are preferred. Examples of such compounds include methyl triethoxysilane, ethyl triethoxysilane, dimethyl tetra-2- ethylhexoxy disiloxane, phenyl triethoxysilane, methyl triphenoxysilane, beta-carbethoxyethyl triethoxysilane, as Well as other CSi bonded silicates which contain substituent groups occupying the l, 2 or 3 positions on each silicon atom, as above described, with the remaining valences being occupied by ester groups.
The preferred CSi bonded silicon salt compounds are the mono-, di-, or trisodium, potassium or ammonium salts of methyl, ethyl, propyl, butyl, amyl, phenyl, cresyl, etc., siloxanes.
The above CSi bonded silanols, silicates and salt compounds can be used alone or in combination for the.
purposes described herein. Each. group of silicon compounds constitutes a well known class of prior art materials.
Preferred compositions prepared in accordance with this invention are the alkaline inhibited hydraulic fluids which contain one or more compounds from the class of alcohols, alcohol ethers, mixtures of such alcohols and Weight percent Lubricant 15 to 35 Dilucnt 65 to 85 Antioxidant to 2 Alkaline inhibitor 0.1 to 2 Silicon compound 0.0001 to 1.0
The lubricant portion contains one or more polyhydric alcohols or polyhydric alco'hol ethers including polyethers, or a mixture of polyhydric alcohols and ethers, all preferably having average molecular weights of at least 300 as a minimum. The lubricant can also contain, as modifiers, esters and polyesters of polyhydric alcohols; reaction products of alkylene oxides and polyfunctional amines, e.g., polyalkylene .polyamines; ethanolarnines and the like; castor oil; blown castor oil, i.e., castor oil which is polymerized by air oxidation; bodied castor oil, i.e., castor oil which is polymerized by heat alone; acetylated oastor oil; glycol modified castor oil, and the like, or mixtures thereof. The diluent portion acts as a solvent permitting adjustments to the composition viscosity, as desired, and can comprise one or more monohydric alcohols or dihydric alcohol monoethers or mixtures thereof and can contain from 0 to 50 weight percent dihydric alcohols all of which have average molecular weights below about 300.
Any suitable method can be used in preparing our hydraulic liquid compositions. The components can be added together or one at a time in any desired sequence. It is preferable, however, to add the antioxidant and alkaline inhibitor as a solution in the alcohol component. It is also preferable to warm this solution during its preparation in order to facilitate dissolution. All components are mixed until a single phase composition is obtained.
Representative of polyhydric alcohols which can be used in the fluid compositions are the alkylene glycols, ie.g., ethylene glycol, propylene glycol, the bntanediols, the pentanediols, the hexanediols and the like, the polyoxyalkylene glycols such as polyoxyethylene glycols, polyoxypropylene glycols, polyoxybutylene glycols and the like, mixed polyoxyalkylene glycols, e.g., polyoxythylenepolyoxypropylene glycols, and polyoxyalkylene triols. Representative ofpolhydric alcohol ethers are the alkyl and aryl monoethers, diethers and triethers of polyhydric alcohols such as those specified above. Examples of polyhydric alcohol ethers are ethylene glycol monomethyl ether, dipropylene glycol monoethyl ether, polyoxyethylene glycol monophenyl ether and the like, ethylene glycol dibutyl ether, propylene glycol dimethyl ether, polyoxypropylene glycol dibutyl ether and the like.
The useful antioxidants and alkaline inhibitorsare well known materials. Typical antioxidants include phenolic compounds, such as 2,2-di-(4-hydroxyphenyl)propane and polymerized trimethyldihydroquinoline and the like, aminessuch as phenyl alpha-naphthylarnine and .phenyl beta-naphthylamine, and the like, as well as hindered phenols and the like. Alkaline inhibitor materials which can be employed in an amount sufficient to maintain alkaline conditions in the fluid composition, i.e. a pH value of from about 7.0 to 11.5, include alkali metal hydroxides, e.g. potassium hydroxide, sodium hydroxide,
etc.; alkali metal borates, e.g. sodium borate, potassium.
nitrites; amines such as morpholine, ethanolamine, triethanolamine, etc.; amine salts such as, for example, the monoor dibutyl ammonium bora-tes and phosphates.
Organic orthosilicate, i.e., organo-si-licon compounds characterized by only alkoxy or only aryloxygroups attached to a single silicon atom or to groups of silicon atoms interconnected by silicon to oxygen to silicon bonds, have been used heretofore in heat transfer fluids and their use as inhibitors in brake fluids is described in copending application, Serial Number 633,178, filed January 9, 1957, now abandoned. Freshly prepared hydraulic fluids thus inhibited show a beneficial effect with respect to metal staining as well as a lack of precipitation in corrosion tests at 212 F. and in Federal Specification VVF-45 1a Water Tolerance Tests at 140 F. However, organic orthosilicates such as ethyl silicate eventually precipitate due to small amounts of water inevitably present in any hydraulic system which hydrolyze the silicate to insoluble silica or condensed silica polymers. Additionally, orthosili'cate-inhibited fluids after being stored for extended periods of time, especially in tin-lined containers, such as those ordinarily used to package fluids, are subject to failure in the Water Tolerance Test due to metal contaminants, soldered seams, etc, which have a pronounced effect in promoting and accelerating the rate and degree of precipitation. However, with alkaline inhibited fluids containing the CSi bonded silicon compounds described herein, the hydraulic fluids remain essentially free of precipitation overextended periods of time by virtue of such compounds being substantially resistant to hydrolysis and polymerization. Although there is some opportunity for C--Si bonded silicon compounds to hydrolyze and polymerize, the substituent groups apparently act as hindering groups which retard the rate of hydrolysis and polymerization, or as solubilizing groups in the event that polymerization occurs. As an example, diphenylsilanediol possesses only two reactive groups, as opposed to the four reactive substituent groups on ethyl silicate through which polymerization can proceed. In this respect the CSi bonded silicon corrosion inhibitors defined herein differ widely from the organic orthosilicates.
The following examples illustrate the fluid compositions of the invention and are not to be considered as limiting the scope of the invention.
EXAMPLE 1 Ethylene glycol monobutyl ether 33.75 Diethylene glycol mo-noethyl ether 25.49 Ethylene glycol 8.26
To parts by weight of this base fluid mixture, 0.5 part by weight of 2,2-di-(4-hydroxyphenyl)pro1:1ane as antioxidant and 0.5 part by weight of borax, i.e., sodium tetraborate (Na B O -5H O), as alkaline inhibitor were added. In the above base fluid and those hereinafter, the antioxidant and alkaline inhibitors were first dissolved at a temperature of 70 C. to 100 C. in the ethylene glycol and the resulting solution was then introduced into the remainder of the mixture.
EXAMPLE 2 To 100 parts by weight of the alkaline inhibited mixture of the fluids prepared in Example 1, eight hydraulic liquid compositions were formulated which contained the fol lowing CSi bonded silicon inhibitors.
The above hydraulic compositions thus prepared were tested for corrosion by incorporating in each of the liquid composition-s five parts by volume of water. 'Six strips, one each of the following (bolted together in the order listed), tin, steel, aluminum, cast iron, brass and copper, were immersed in each of the hydraulic liquid-water solutions and the temperature of the solutions raised to 212 F. This temperature was maintained for five days. At the end of this period all of the test strips remained clean and bright without any corrosion or staining. Without the silicon compounds each of the fluid compositions caused corrosion and staining of the test strips.
EXAMPLE 3 An alkaline inhibited base fluid containing the following materials was prepared. Polyoxyethylene-polyoxypropylene glycol monobutyl ether (2000 S.U.S. at 25 C.)
parts by volume 12.5 Polyoxyethylene-polyoxypropylene glycol monobutyl ether-(260 S.U.S. at 25 C.) do 12.5 Diethylene glycol monoethyl ether do 60.0 Diethylene glycol monobutyl ether do 10.0 Ethylene glycol do 5.0 2,2adi-'(4-hydroxyphenyl) propane percent by wt 0.5 Sodium tetrabOPate-SH O do 0.5
To 100 parts by weight of the alkaline inhibited mixture of the fluid prepared in Example 3, two hydraulic fluid compositions were formulated, one of which contained .005 part by Weight of diphenylsilanediol and the other .005 part by weight of methyl triethoxysilane. The hydraulic fluid compositions were prepared for corrosion testing by incorporating therein five parts by volume of water and each were tested for corrosion with metal strips as indicated above in Example 2. The CSi bonded silicon inhibitors substantially eliminated corrosion and staining of all the test strips whereas without the added silicon compound each fluid caused corrosion and staining of the metals.
EXAMPLE 4 An alkaline inhibited base fluid containing the following materials was prepared. Polyoxyethylene-polyoxypropylene glycol monobutyl ether (260 S.U.S. at 26 C.)
parts by volume Diethylene glycol m'onomethyl ether do Ethylene glycol monobutyl ether do 25 Ethylene glycol monoethyl ether ..do 25 Ethylene glycol do 5 2,2-di-(4 hydroxyphenyl)propane percent by -wt 0.5 Sodium tetraborate-d0H O do 0.5
6 EXAMPLE 5 An alkaline inhibited base fluid containing the following materials was prepared. Polyoxyethylene-polyoxypropylene glycol monobutyl ether (260 S.U.S. at 25 C.)
parts by volume 25 Diethylene glycol monoethyl ether do 61 'Polyoxypropylene glycol (150 avg. mol. wt.) do 5 Ethylene lglycol do 4 Reaction product of about equal parts by weight of castor oil and polyoxypropylene glycol (150 avg. mol. wt.) do 5 2,2-di-(4-hydroxyphenyl)propane percent by wt 0.5 Potassium tetraborate do 0.5
To 100 parts by weight of the alkaline inhibited mixture of fluids of Example 5, five hydraulic liquid compositions were formulated which contained 0.005 part by weight of beta-carbethoxyethyl triethoxysilane, 0.005 part by weight of diphenylsilanediol, 0.005 part by weight of phenyl tm'ethoxysilane, 0.01 part by weight of methyl triethoxysilane, and 0.005 part by weight of amyl triethoxysilane, respectively.
With each fluid composition thus formulated the CSi bonded silicon inhibitors eliminated the corrosion and staining of all the test strips when such fluids were subjected to the corrosion test described in Example 2. Without the added silicon inhibitors each hydraulic fluid caused corrosion and staining of the test metals.
EXAMPLE 6 Table I below illustrates a direct comparison between 1 the hydrolytic stability of alkaline inhibited hydraulic fluids containing organic orthosilicates and the CSi bonded silicon inhibitors of the invention. The coma temperature of 140:3 F. and held at that temperature to the point of failure. Failure of the test occurs when the hydraulic fluids show precipitation, separation, sedimentation, or crystallization. This test demonstrates the relative resistance of the organic orthosilicate and the CSi bonded silicon-containing fluids of this invention to hydrolysis and polymerization which results in precipitation.
Without the added silicon inhibitors each Table l EXTENDED WATER TOLERANCE TEST (3%% ADDED WATER) AT F. WITH INHIBITED BRAKE FLUIDS Days to failure due to precipitation 1 Inhibitors Base Base fluid of fluid of Ex. 3 Ex. 4
None (control 28+ 28+ Organic orthosilicates:
0.003% ethyl si1icate 2 3 0.006% ethyl silicate 1 1 0.005% hexa-2-ethylbutoxydisiloxane 4 28+ 0.01% hexa-2-ethylbutoxydisiloxane 3 4 CSi bonded silicates:
0.005% Methyl triethoxysilane 28+ 28+ 0.01% Methyl triethoxysilane 28+ 28+ 0.005% Amyl triethoxysilane- 28+ 23+ 0.01% amyl triethoxysilane 28+ 28+ 0.005% phenyl triethoxysilane. 28+ 0.01% phenyl tricthoxysilane 28+ 0.01% dimethyl tetra-2-ethylhexoxydisiloxane.. 28+ 28+ 0.02% dimethyl tetra-Z-ethylhcxoxydisiloxanen 28+ 28+ 0.005% beta-carbethoxyethyl triethoxysilane 28+ 28+ 0.01% beta-carbethoxyethyl triethoxysilanc.. 28+ 28+ CSi bonded silanols:
0.005% dlphenysilanediol 28+ 28+ 0.01% diphenylsilanediol 28+ 28+ 0.005% triphenylsilanol 28+ 28+ 0.01% triphenylsilanol 28+ 28+ 0.005% tetramethyl disiloxanediol-1,3 28+ 28+ CSi bonded salts: 0.00156% sodium salt of methyl siloxane 28+ 28+ 0.00312% sodium salt of methyl siloxane 28+ 28+ 1 sign indicates that failure has not occurred.
7 EXAMPLE 7 Table II below illustrates the superior stability of CSi bonded silicon com-pounds in alkaline inhibited hydraulic fluids which are stored in tin-lined containers over extended periods of time. As little as 7 ppm. of combined tin and lead contamination in organic orthosilicate-inhibited hydraulic fluids has been found to promote copious precipitates in Water Tolerance and Corrosion Tests. In Table II below, each of the formulations were stored in tin-lined containers for several days at an elevated temperature prior to performing the Water Tolerance Test at 140 F. as described in. Federal Specification VV-F- 451a (Sec. 3.7.2). This test is the same as described in Example 6 except that the test period is 24 hours. Under these conditions the fluids containing organic orthosilicates; i.e., ethylsilicate or hexa-2-ethylbutoxydisiloxane formed heavy precipitates. The fluids containing the CSi bonded silicon inhibitors were free of precipitates.
radicals having 1-18 carbon atoms, aryl radicals having 6-18 carbon atoms and cations selected from the group consisting of sodium, potassium and ammonium; x is a member selected from the group consisting of R and OR; a represents a value of 1 to 3', b and c represent a value of 0 to 2; d represents a value of 0 to 1; and 2 represents a value of 1 to 2, said silicon compound being present in an amount sufficient to eifectively inhibit corrosion.
2. A non-corrosive hydraulic brake fluid composition consisting essentially of a lubricant selected from the group consisting of polyhydric alcohols and polyhydric alcohol ethers and mixtures thereof, said alcohols and ethers having a minimum average molecular weight of at least 300, and a diluent selected from the group consisting of dihydric alcohols and the manoalkyl ethers of dihydric alcohols, said dihydric alcohols and ethers having average molecular weights of below 300; an alkaline inhibitor suificient to provide a pH value of from about 7.0 to 11.5, and as a corrosion inhibitor, from about Table II WATER TOLERANCE TESTS (3%% ADDED WATER), ONE DAY AT 140 F WITH INHIBITED BRAKE FLUIDS Inhibitors Base fluid of Base fluid of Ex. 4
None (Control) Trace haze Clear. Organic Orthosilicates:
0.003% ethyl silicate. Flocculent precipitate. 0.006% ethyl silicate. Flocculent pre- Flocculent precipitate, 0.005% hexa-Z-ethylbutoxydisiloxane cipitate. slight haze 0.01% hexa-2-ethylbutoxydisiloxane Flocculent precipitate. CSi bonded silicates: 0.005% methyl triethoxysilane Clear Clear.
0.01% methyl trieth0xysilane (1 .Do. 0.005% amyl triethoxysilane Do. 0.01% amyl triethoxysilane Do. 0.005% phenyl triethoxysilan Do. 0.01% phenyl trieth0xysilane D0. 0.01% dimethyl tetra-Z-ethylhexoxy-disi- Do.
soloxane. 0.02% dimethyl tetra-Z-ethylhexoxy-clisi- Do.
oxane. 0.005% beta-carbethoxyethyl triethoxy-sil- V. sl. haze Do.
ane. 0.01% beta-carbethoxyethyl triethoxy-sil- Clear D0.
ane. CSi bonded silanols:
0.005% diphenylsilanediol Slight haze D0. 0.01% diphenylsilanedioh do D0. 0.005% triphenylsilanol. Trace haze Do 0.01%triphenylsilano1 0 Do. 0.005% tetramethyl disilixanediol-l,3 Slight haze Do. CSi bonded salts:
0.00156% sodium salt of methyl siloxane Trace haze Do. 0.00312% sodium salt of methyl siloxane Clear D0.
CSi bonded compounds remained clear after 2 days.
Although the invention has been illustrated by the preceded examples, the invention is not to be construed as limited to the materials employed in the above exemplary examples, but rather, the invention encompasses the generic concept as here-inbefore disclosed. Various modifications and embodiments of this invention can be made without departing from the spirit and scope thereof.
What is claimed is:
1. A non-corrosive hydraulic brake fluid composition consisting essentially of a hydraulic fluid selected from the group consisting of polyhydric alcohols, polyhydric alcohol ethers and mixtures thereof; an alkaline inhibitor sufiicient to provide a pH value of from about 7.0 to 11.5, and as a corrosion inhibitor therefor a CSi bonded silicon compound of the formula (OR')b Riv-Si 0.0001 to 1.0 percent by Weight of a CSi bonded compound of the formula:
0 R) (OR) I all Il -Si I r L e in wherein n represents a value of 0 to 5; R is a radical having 1-18 carbon atoms, selected from the group consisting of alkyl, aryl and carbalkoxyalkyl; R is a member selected from the group consisting of hydrogen, alkyl radicals having 1-18 carbon-atoms, aryl radicals having 618 carbon atoms, and cations selected from the group consisting of sodium, potassium and ammonium; x is a member selected from the group consisting of R and OR; a represents a value of 1 to 3; b and c represent a value of 0 to 2; d represents a value of 0 to 1; and e represents a value of 1 to 2.
3. A non-corrosive hydraulic brake fluid composition consisting essentially of 15 to 35 weight percent of a lubricant selected from the group consisting of polyhydric alcohols, polyhydric alcohol ethers and mixtures thereof, said alcohols and ethers having a minimum average molecular weight of at least 300; from 65 to weight percent of a diluent selected from the group consisting of dihydric alcohols and the monoalkyl ethers of said dihydride alcohols, having average molecular weights of below 300; an alkaline inhibitor sufliciemt to provide a pH value of firom about 7.0 to 11.5 and as a corrosion inhibitor, a C-Si bonded silicon compound of the formula:
b a alias l member selected from the group consisting of R and OR;
a represents a value of 1 to 3; b and 0 represent a.value of 0 to 2; d represents a value of 0 to 1; made re resents a value of 1 to 2, said silicon compound being present in an amount suflicient to, effectively inhibit corrosion.
4. A non-corrosive hydraulic brake fluid composition consisting essentially of 15 to 35 weight percent of a lubricant selected from the group consisting of polyhydric alcohols, polyhydric alcohol ethers and mixtures thereof, said alcohols and others having a minimum average molecular weight of at least 300; from 65 to 85 weight percent of a diluent selected from the group consisting of dihydric alcohols and the monoalkyl ethers of said dihydride alcohols, having average molecular weights of below 300; an alkaline inhibitor sufiicient to provide a pH value of from about 7.0 to 11.5 and as a corrosion inhibitor, from about 0.0001 to 1.0% by weight of a C-Si bonded silicon compound of the formula:
u R'nL in wherein n represents a value of 0 to 5; R is a radical, having 118 carbon atoms, selected from the group consisting of alkyl, aryl, and carbalkoxyalkyl; R is a member selected from the group consisting of hydrogen, alkyl radicals having 1-18 carbon atoms, aryl radicals having 6-18 carbon atoms, and cations selected from the group consisting of sodium, potassium and ammonium; x is a member selected from the group consisting of R and OR; a represents a value of 1 to 3; b and 0 represent a value of 0 to 2; d represents a value 0 to 1; and e represen a value of 1 to 2.
5. The hydraulic brake fluid compositi n 0f 01mm 4 wherein the CSi bonded silicon compcund 1S dlpheflylsilanediol.
The hydraulic brake fluid composition of claim 4 h i th C-Si bonded silicon compound is tetramethyl disiloxanediol.
7. The hydraulic brake fluid composition of claim 4 wherein the CSi bonded silicon compound is methyl triethoxysilane.
8. The hydraulic brake fluid composition of claim 4 wherein the Cfi i bonded silicon compound is betacarbethoxyethyl triethoxysilane.
9. The hydraulic brake fluid composition of claim 4 wherein the C-Si bonded silicon compound is amyl triethoxysilane.
References Cited in the file of this patent UNITED STATES PATENTS 2,345,586 Clark Apr. 4, 1944 2,407,037 Sowa Sept. 3, 1946 2,834,748 Bailey et a1. May 13, 1958 2,905,642 Miller et al Sept. 22, 1959 2,914,548 Sch-roll Nov. 24, 1959 2,995,590 Peeler et a1. Aug. 8, 1961 FOREIGN PATENTS 550,090 Canada Dec. 10, 1957
Claims (1)
1. A NON-CORROSIVE HYDRAULIC BRAKE FLUID COMPOSITION CONSISTING ESSENTIALLY OF A HYDRAULIC FLUID SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS, POLYHYDRIC ALCOHOL ETHERS AND MIXTURES THEREOF; AND ALKALINE INHIBITOR SUFFICIENT TO PROVIDE A PH VALUE OF FROM ABOUT 7.0 TO 11.5, AND AS A CORROSION INHIBITOR THEREFOR A C-SI BONDED SILICON COMPOUND OF THE FORMULA
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US751145A US3098825A (en) | 1958-07-28 | 1958-07-28 | Non-corrosive hydraulic fluids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US751145A US3098825A (en) | 1958-07-28 | 1958-07-28 | Non-corrosive hydraulic fluids |
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| Publication Number | Publication Date |
|---|---|
| US3098825A true US3098825A (en) | 1963-07-23 |
Family
ID=25020683
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US751145A Expired - Lifetime US3098825A (en) | 1958-07-28 | 1958-07-28 | Non-corrosive hydraulic fluids |
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| Country | Link |
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| US (1) | US3098825A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4405469A (en) * | 1978-03-08 | 1983-09-20 | Consortium Fur Elektrochemische Ind. Gmbh | Greases prepared from organosiloxanes with SiC-bonded groups |
| EP0622444A1 (en) * | 1992-08-18 | 1994-11-02 | Ethyl Japan Corporation | Lubricating oil composition for wet clutch or wet brake |
| US20080058232A1 (en) * | 2006-08-31 | 2008-03-06 | Chevron Oronite Company Llc | Tetraoxy-silane lubricating oil compositions |
| US20100081588A1 (en) * | 2008-09-30 | 2010-04-01 | Chevron Oronite Company Llc | Lubricating oil compositions |
| US7867960B2 (en) | 2006-08-31 | 2011-01-11 | Cherron Oronite Company LLC | Method for forming tetraoxy-silane derived antiwear films and lubricating oil compositions therefrom |
| WO2015153004A3 (en) * | 2014-03-31 | 2016-02-25 | Exxonmobil Research And Engineering Company | Low viscosity, low volatility lubricating oil basestocks |
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| US2345586A (en) * | 1940-08-03 | 1944-04-04 | Packard Motor Car Co | Hydraulic fluid |
| US2407037A (en) * | 1939-10-21 | 1946-09-03 | Frank J Sowa | Lubricant and process of lubricating surfaces therewith |
| CA550090A (en) * | 1957-12-10 | Texaco Development Corporation | Foam-inhibiting and foam-inhibited compositions | |
| US2834748A (en) * | 1954-03-22 | 1958-05-13 | Union Carbide Corp | Siloxane-oxyalkylene block copolymers |
| US2905642A (en) * | 1956-02-27 | 1959-09-22 | Gen Aniline & Film Corp | Viscosity hydraulic fluid |
| US2914548A (en) * | 1956-12-14 | 1959-11-24 | Ethyl Corp | Process for producing aryloxyphenyl silanes |
| US2995590A (en) * | 1958-06-30 | 1961-08-08 | California Research Corp | Alkoxysilanes |
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| CA550090A (en) * | 1957-12-10 | Texaco Development Corporation | Foam-inhibiting and foam-inhibited compositions | |
| US2407037A (en) * | 1939-10-21 | 1946-09-03 | Frank J Sowa | Lubricant and process of lubricating surfaces therewith |
| US2345586A (en) * | 1940-08-03 | 1944-04-04 | Packard Motor Car Co | Hydraulic fluid |
| US2834748A (en) * | 1954-03-22 | 1958-05-13 | Union Carbide Corp | Siloxane-oxyalkylene block copolymers |
| US2905642A (en) * | 1956-02-27 | 1959-09-22 | Gen Aniline & Film Corp | Viscosity hydraulic fluid |
| US2914548A (en) * | 1956-12-14 | 1959-11-24 | Ethyl Corp | Process for producing aryloxyphenyl silanes |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4405469A (en) * | 1978-03-08 | 1983-09-20 | Consortium Fur Elektrochemische Ind. Gmbh | Greases prepared from organosiloxanes with SiC-bonded groups |
| EP0622444A1 (en) * | 1992-08-18 | 1994-11-02 | Ethyl Japan Corporation | Lubricating oil composition for wet clutch or wet brake |
| EP0622444A4 (en) * | 1992-08-18 | 1995-02-15 | Ethyl Japan Corp | Lubricating oil composition for wet clutch or wet brake. |
| US20080058232A1 (en) * | 2006-08-31 | 2008-03-06 | Chevron Oronite Company Llc | Tetraoxy-silane lubricating oil compositions |
| US7867960B2 (en) | 2006-08-31 | 2011-01-11 | Cherron Oronite Company LLC | Method for forming tetraoxy-silane derived antiwear films and lubricating oil compositions therefrom |
| US8067346B2 (en) | 2006-08-31 | 2011-11-29 | Chevron Oronite Company Llc | Tetraoxy-silane lubricating oil compositions |
| US20100081588A1 (en) * | 2008-09-30 | 2010-04-01 | Chevron Oronite Company Llc | Lubricating oil compositions |
| US8153566B2 (en) | 2008-09-30 | 2012-04-10 | Cherron Oronite Company LLC | Lubricating oil compositions |
| WO2015153004A3 (en) * | 2014-03-31 | 2016-02-25 | Exxonmobil Research And Engineering Company | Low viscosity, low volatility lubricating oil basestocks |
| US9822326B2 (en) | 2014-03-31 | 2017-11-21 | Exxonmobil Research And Engineering Company | Low viscosity, low volatility lubricating oil basestocks |
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