US3069387A - Thixotropic thread lubricant - Google Patents
Thixotropic thread lubricant Download PDFInfo
- Publication number
- US3069387A US3069387A US588626A US58862656A US3069387A US 3069387 A US3069387 A US 3069387A US 588626 A US588626 A US 588626A US 58862656 A US58862656 A US 58862656A US 3069387 A US3069387 A US 3069387A
- Authority
- US
- United States
- Prior art keywords
- teflon
- thixotropic
- lubricant
- grams
- castor oil
- 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
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- 239000000314 lubricant Substances 0.000 title claims description 28
- 230000009974 thixotropic effect Effects 0.000 title claims description 17
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- -1 POLYTETRAFLUOROETHYLENE Polymers 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- OGQYPPBGSLZBEG-UHFFFAOYSA-N dimethyl(dioctadecyl)azanium Chemical compound CCCCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCCCC OGQYPPBGSLZBEG-UHFFFAOYSA-N 0.000 claims description 4
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims 1
- 239000004809 Teflon Substances 0.000 description 26
- 229920006362 Teflon® Polymers 0.000 description 26
- 239000004359 castor oil Substances 0.000 description 13
- 229960001777 castor oil Drugs 0.000 description 13
- 235000019438 castor oil Nutrition 0.000 description 13
- 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 13
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 10
- 239000003349 gelling agent Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000009736 wetting Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 235000013305 food Nutrition 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- YEVQZPWSVWZAOB-UHFFFAOYSA-N 2-(bromomethyl)-1-iodo-4-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC=C(I)C(CBr)=C1 YEVQZPWSVWZAOB-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229940067597 azelate Drugs 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 235000012343 cottonseed oil Nutrition 0.000 description 1
- 239000002385 cottonseed oil Substances 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 229940096810 diethylhexyl sebacate Drugs 0.000 description 1
- VJHINFRRDQUWOJ-UHFFFAOYSA-N dioctyl sebacate Chemical compound CCCCC(CC)COC(=O)CCCCCCCCC(=O)OCC(CC)CCCC VJHINFRRDQUWOJ-UHFFFAOYSA-N 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- C10M5/00—Solid or semi-solid compositions containing as the essential lubricating ingredient mineral lubricating oils or fatty oils and their use
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/14—Inorganic compounds or elements as ingredients in lubricant compositions inorganic compounds surface treated with organic compounds
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/08—Aldehydes; Ketones
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/34—Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
- C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
-
- 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
- C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2211/06—Perfluorinated compounds
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- 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
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/02—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen and halogen only
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- 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
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/06—Perfluoro polymers
- C10M2213/062—Polytetrafluoroethylene [PTFE]
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- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
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- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/26—Amines
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- 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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
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- 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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/042—Metal salts thereof
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- 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
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S384/00—Bearings
- Y10S384/90—Cooling or heating
- Y10S384/91—Powders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/90—Fastener or fastener element composed of plural different materials
- Y10S411/901—Core and exterior of different materials
- Y10S411/902—Metal core
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/914—Coated bolt
Definitions
- the lubricant is characterized by reducing the galling between threaded members of stainless steel, titanium, aluminum and the like, and employs a relatively high concentration of powdered polytetrafiuoroethylene, i.e., Teflon, and a mild pressure lubricant in a thixotropie gelling agent, such as Bentone 34.
- This invention relates, then, to a thread lubricant having a mild pressure, wetting type lubricating oil, such as castor oil with an organophilic gelling agent, such as Bentone 34, and powdered polytetrafiuoroethylene, which will be referred to hereinafter for simplicity as Teflon.
- a thread lubricant having a mild pressure, wetting type lubricating oil, such as castor oil with an organophilic gelling agent, such as Bentone 34, and powdered polytetrafiuoroethylene, which will be referred to hereinafter for simplicity as Teflon.
- An object of this invention is to provide a new and improved lubricant, particularly a thread lubricant, having a spacer or cushioning element which will prevent locking of the threads
- a further object of this invention is to provide a nonsettling thixotropic lubricant which will have permanently suspended therein spacer particles of small size of polytetrafiuoroethylene to cushion the locking action of the threads.
- Teflon is employed because of its good anti-friction properties, and it is intended to be used in specific sizes, viz., 1 to 20 microns in "dimension, i.e., 1 to 20 millionths of a meter. This will be less than the average (root mean square) size of the asperites of the threaded particles, yet small enough to fill depressions on the tops of the asperites.
- Teflon is characterized by its low modulus of elasticity and its extremely low co-efflcient of friction.
- the modulus of elasticity of Teflon is important because it means that each of these little particles of Teflon serves as a rider or cushioning element for the asperite and can be deformed by the asperite rather than serving as rigid particles which would increase the friction. When they are small enough and have a low enough modulus, they tend to bend elastically and permit the surfaces to glide with respect to one an other.
- a partial explanation of the low co-eflicient of friction of Teflon with steel may be due to the low surface shear stress of Teflon.
- Teflon particles of small size in a thixotropic lubricant containing a fatty acid base mild pressure lubricating oil
- castor oil is a good lubricant in that it bonds to the metallic surfaces, forming both a physical and a chemi-sorbed bond.
- a thixotropic gelling agent such as Bentone 34, and Teflon.
- the Teflon serves as a lubricating medium in itself, having a very low co-eflicient of friction. However, it would be ineffective if not held in position, i.e., in the thixotropic thread lubricant, so that it is ready to perform its function at the surface of the moving or gelling parts. It further will be held to the surface by the wetting action of the lubricating material such as castor oil.
- the combination of the thixotropic gelling agent and the mild pressure lubricant which in this particular instance is a castor oil-Bentone mixture, has a considerably lower frictional co-eflicient with the Teflon than without it.
- the Teflon in this combination acts in several ways.
- the material itself and in combination with the mild pressure lubricant has a particularly low co-eflicient of friction with a metal such as steel.
- the Teflon stays in position because of the wetting action of the mild pressure lubricant.
- the thixotropic gelling agent further increases the adherence of the mild pressure lubricant to the Teflon.
- a standard composition for one batch might be 2000 cc. of castor oil; 160 grams of a thixotropic gelling agent, such as Bentone 34, which is dimethyldioctadecyl ammonium bentonite; cc. of acetone; and 730 grams of Teflon.
- Bentone 34 which is dimethyldioctadecyl ammonium bentonite
- cc. of acetone acetone
- Teflon 730 grams
- Teflon may be used from 20 to 50 percent of the mixture with the balance being fluid, principally lubricating oil and the thixotropic gelling agent.
- the powdered Teflon is processed as follows. Teflon is stored in a deep-freeze to prevent agglomeration. It is scraped through a stainless steel screen into the media, castor oil. This is to break up any agglomeration that may have been formed. If particles have been agglomerated in spite of these precautions by being stored for a time at higher temperatures, it is recommended that the Teflon be frozen and screened again. A limited amount of mixing and stirring is performed in the castor oil after the Bentone and acetone have been added, and these effectively make a thixotropic gelling agent and carrier for the Teflon;
- the Bentone 34 is, of course, an organophilic gelling agent suitable for use with castor oil.
- a Manton-Gaulin homogenizer was used to impart shear into the mixture. It may be possible under some conditions to use a high speed ball or rod mill, propeller agitation and heaters. A limited amount of agglomeration takes place in this means, but does not seem to harm the final product,
- thixotropic lubricants containing Teflon are satisfactory, that is, any lubricant that is a wetting, mild pressure lubricant may be substituted for the castor oil if suitable thixotropic agents may be used in connection therewith.
- suitable thixotropic agents might be sperm oil, soybean oil or mineral oil.
- diester fluids normally used as plasticizers examples of which are trioctyl phosphate, ethyl azelate and diethylhexyl sebacate.
- Du Pont Teflon 3086 a sticky polytetrafluoroethylene polymer, in a proportion usually ranging from to 40 percent of the T efion powder used, i.e., this material may be used up to 40 percent of the entire mixture.
- this material may be used up to 40 percent of the entire mixture.
- castor oil 1000 cc.
- Teflon 350 grams
- Du Pont Teflon 3086 34 grams
- acetone, 40 cc. and possibly suitable coloring matter.
- a thixotropic thread lubricant having a proportion f. of ingredients as specified; castoroil 2000 cc. and additional ingredients in the following varying proportions: dimethyldioctadecyl ammonium bentonite from to 400 grams; acetone from 25 to 200 cc.; finely powdered polytetrafluoroethylene from 1 to 20 microns in size from about 500 to 850 grams.
- a thixotropic thread lubricant having a proportion of ingredients as specified: castor oil 2000 cc.; dimethyldioctadecyl ammonium bentonite from 120 to 170 grams; actone from about to cc.; finely powdered polytetrafluoroethylene from 1 to 20 microns in size from about 700 to 800 grams.
- a thixotropic thread lubricant having a proportion of ingredients as specified: castor oil, 2000 cc.; dimethyldioetadecyl ammonium bentonite, of grams; acetone, 85 cc.; finely powdered polytetrafluoroethylene, from 1 to 20 microns in size, 730 grams.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Description
3,06%,337 THTXQTRQPMZ THREAT) LUBRHCANT Lloyd it. Alien, Eelmont, and Dudley H. Woodard, Cambridge, Mass, assignors, by rnesne assignments, to Kenmore Research Company, Framingham, Mass., a corporation of (thin No Drawing. Filed June 1, 1956, Ser. No. 588,626 3 (Claims. (Cl. 252-495) This invention, relating as indicated to thixotropic lubricants, is particularly directed to a thixotropic thread lubricant adaptable for use over a Wide range of temperatures, especially under 400 F. The lubricant is characterized by reducing the galling between threaded members of stainless steel, titanium, aluminum and the like, and employs a relatively high concentration of powdered polytetrafiuoroethylene, i.e., Teflon, and a mild pressure lubricant in a thixotropie gelling agent, such as Bentone 34.
in the prior art, various types of lubricants, greases and thread lubricants have been known, but these have had certain limiting conditions and have not had as low a co-eflicient of friction as was desirable, particularly over a wide temperature range.
This invention relates, then, to a thread lubricant having a mild pressure, wetting type lubricating oil, such as castor oil with an organophilic gelling agent, such as Bentone 34, and powdered polytetrafiuoroethylene, which will be referred to hereinafter for simplicity as Teflon.
An object of this invention is to provide a new and improved lubricant, particularly a thread lubricant, having a spacer or cushioning element which will prevent locking of the threads A further object of this invention is to provide a nonsettling thixotropic lubricant which will have permanently suspended therein spacer particles of small size of polytetrafiuoroethylene to cushion the locking action of the threads.
In connection with this invention, Teflon is employed because of its good anti-friction properties, and it is intended to be used in specific sizes, viz., 1 to 20 microns in "dimension, i.e., 1 to 20 millionths of a meter. This will be less than the average (root mean square) size of the asperites of the threaded particles, yet small enough to fill depressions on the tops of the asperites.
in this connection Teflon is characterized by its low modulus of elasticity and its extremely low co-efflcient of friction. The modulus of elasticity of Teflon is important because it means that each of these little particles of Teflon serves as a rider or cushioning element for the asperite and can be deformed by the asperite rather than serving as rigid particles which would increase the friction. When they are small enough and have a low enough modulus, they tend to bend elastically and permit the surfaces to glide with respect to one an other. A partial explanation of the low co-eflicient of friction of Teflon with steel may be due to the low surface shear stress of Teflon.
Further in connection with this composition of Teflon particles of small size in a thixotropic lubricant containing a fatty acid base, mild pressure lubricating oil, it is intended to use castor oil. Castor oil is a good lubricant in that it bonds to the metallic surfaces, forming both a physical and a chemi-sorbed bond. With this lubricant, we intend to use a thixotropic gelling agent, such as Bentone 34, and Teflon.
The Teflon serves as a lubricating medium in itself, having a very low co-eflicient of friction. However, it would be ineffective if not held in position, i.e., in the thixotropic thread lubricant, so that it is ready to perform its function at the surface of the moving or gelling parts. It further will be held to the surface by the wetting action of the lubricating material such as castor oil. The combination of the thixotropic gelling agent and the mild pressure lubricant, which in this particular instance is a castor oil-Bentone mixture, has a considerably lower frictional co-eflicient with the Teflon than without it.
It will be seen from the foregoing that the Teflon in this combination acts in several ways. First, it acts as a barrier particle or spacer element so that the metal particle, such as steel, never would rub against the oppositely disposed surface and, in performing this function, it reduces the co-efiicient of friction. The material itself and in combination with the mild pressure lubricant has a particularly low co-eflicient of friction with a metal such as steel. The Teflon stays in position because of the wetting action of the mild pressure lubricant. The thixotropic gelling agent further increases the adherence of the mild pressure lubricant to the Teflon.
Under tests of threaded parts employing this combination of materials, the galling was greatly reduced by the action described.
As an example of these compositions and how they are made, the following is given. A standard composition for one batch might be 2000 cc. of castor oil; 160 grams of a thixotropic gelling agent, such as Bentone 34, which is dimethyldioctadecyl ammonium bentonite; cc. of acetone; and 730 grams of Teflon. The followlog are examples of the ranges that may be employed:
From the foregoing, it will be seen that Teflon may be used from 20 to 50 percent of the mixture with the balance being fluid, principally lubricating oil and the thixotropic gelling agent.
in these compositions, the powdered Teflon is processed as follows. Teflon is stored in a deep-freeze to prevent agglomeration. It is scraped through a stainless steel screen into the media, castor oil. This is to break up any agglomeration that may have been formed. If particles have been agglomerated in spite of these precautions by being stored for a time at higher temperatures, it is recommended that the Teflon be frozen and screened again. A limited amount of mixing and stirring is performed in the castor oil after the Bentone and acetone have been added, and these effectively make a thixotropic gelling agent and carrier for the Teflon; The Bentone 34 is, of course, an organophilic gelling agent suitable for use with castor oil. A Manton-Gaulin homogenizer was used to impart shear into the mixture. It may be possible under some conditions to use a high speed ball or rod mill, propeller agitation and heaters. A limited amount of agglomeration takes place in this means, but does not seem to harm the final product,
As additional examples of the manner in which this invention may be carried out, the minimum and maximum ranges may be used and have been used as examples, and compositions at varying points within the preferred range have been used.
While only a few examples have been given herein, other thixotropic lubricants containing Teflon are satisfactory, that is, any lubricant that is a wetting, mild pressure lubricant may be substituted for the castor oil if suitable thixotropic agents may be used in connection therewith. Examples of these might be sperm oil, soybean oil or mineral oil. Examples of other fluids that may be used are the diester fluids normally used as plasticizers, examples of which are trioctyl phosphate, ethyl azelate and diethylhexyl sebacate.
In connection with thread lubricants, particularly in the food and drug industries, we may use a lubricant of cottonseed oil and bentone, water and bentonite, or other combinations of these materials which would not contaminate the food or products with which they are used.
In addition to Teflon, We may also use Du Pont Teflon 3086, a sticky polytetrafluoroethylene polymer, in a proportion usually ranging from to 40 percent of the T efion powder used, i.e., this material may be used up to 40 percent of the entire mixture. As an example of this, we may use the following: castor oil, 1000 cc.; Teflon, 350 grams; Du Pont Teflon 3086, 34 grams; Bentone 34-, 80 grams; acetone, 40 cc. and possibly suitable coloring matter.
This invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments and examples are, therefore, considered in all respects to be illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are, therefore, intended to be embraced therein.
We claim:
1. A thixotropic thread lubricant having a proportion f. of ingredients as specified; castoroil 2000 cc. and additional ingredients in the following varying proportions: dimethyldioctadecyl ammonium bentonite from to 400 grams; acetone from 25 to 200 cc.; finely powdered polytetrafluoroethylene from 1 to 20 microns in size from about 500 to 850 grams.
2. A thixotropic thread lubricant having a proportion of ingredients as specified: castor oil 2000 cc.; dimethyldioctadecyl ammonium bentonite from 120 to 170 grams; actone from about to cc.; finely powdered polytetrafluoroethylene from 1 to 20 microns in size from about 700 to 800 grams.
3. A thixotropic thread lubricant having a proportion of ingredients as specified: castor oil, 2000 cc.; dimethyldioetadecyl ammonium bentonite, of grams; acetone, 85 cc.; finely powdered polytetrafluoroethylene, from 1 to 20 microns in size, 730 grams.
References Cited in the tile of this patent UNITED STATES PATENTS 2,510,078 Compton et al June 6, 1950 2,510,112 Holbrook lune 6, 1950 2,531,440 iordan Nov. 28, 1950 2,644,802 Lontz July 7, 1953 2,679,479 Peterson et al May 25, 1954 2,746,887 ONeil May 22, 1956 2,824,060 White Feb. 18, 1958 2,833,720 Stratton May 6, 1958
Claims (1)
1. A THIXOTROPIC THREAD LUBRICANT HAVING A PROPORTION OF INGREDIENTS AS SPECIFIED; CASTOR OIL 2000 CC. AND ADDITIONAL INGREDIENTS IN THE FOLLOWING VARYING PROPORTIONS: DIMETHYLDIOCTADECYL AMMONIUM BENTONITE FROM 50 TO 400 GRAMS; ACETONE FROM 25 TO 200 CC; FINELY POWDERED POLYTETRAFLUOROETHYLENE FROM 1 TO 20 MICRONS IN SIZE FROM ABOUT 500 TO 850 GRAMS.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US588626A US3069387A (en) | 1956-06-01 | 1956-06-01 | Thixotropic thread lubricant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US588626A US3069387A (en) | 1956-06-01 | 1956-06-01 | Thixotropic thread lubricant |
Publications (1)
Publication Number | Publication Date |
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US3069387A true US3069387A (en) | 1962-12-18 |
Family
ID=24354629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US588626A Expired - Lifetime US3069387A (en) | 1956-06-01 | 1956-06-01 | Thixotropic thread lubricant |
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Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3159577A (en) * | 1959-12-23 | 1964-12-01 | Gulf Research Development Co | Grease containing polytetrafluoroethylene |
US3194762A (en) * | 1961-06-12 | 1965-07-13 | Int Harvester Co | Extreme pressure lubricant and method for making the same |
US3234758A (en) * | 1959-10-08 | 1966-02-15 | Gen Motors Corp | Drive shaft slip spline assembly |
US3247116A (en) * | 1961-11-07 | 1966-04-19 | Duriron Co | Lubricants containing degraded polytetrafluoroethylene |
DE1272479B (en) * | 1965-06-14 | 1968-07-11 | Falkensteiner Gardinen Und Spi | Dry lubricant for reel machines |
US3437630A (en) * | 1965-12-20 | 1969-04-08 | Baker Oil Tools Inc | Thread sealing composition |
US3437593A (en) * | 1966-05-25 | 1969-04-08 | Peter N Bellavin | Antiseize sealing compound |
US3462175A (en) * | 1965-04-20 | 1969-08-19 | Sonel | Connector for unthreaded pipe,and method of making the same |
US3526593A (en) * | 1964-01-02 | 1970-09-01 | Chevron Res | Pipe thread sealant containing polytetrafluoroethylene |
US3879302A (en) * | 1973-07-10 | 1975-04-22 | Ebert Michael | Fluorocarbon-based sealing compound |
US4213868A (en) * | 1978-10-27 | 1980-07-22 | Witco Chemical Corporation | Galvanic corrosion prevention coupling |
US4548960A (en) * | 1978-10-17 | 1985-10-22 | Unasco Pty. Limited | Pipe jointing compounds |
US4692988A (en) * | 1986-08-19 | 1987-09-15 | Nowsco Well Service (U.K.) Limited | Screw thread protection |
US4830411A (en) * | 1987-02-23 | 1989-05-16 | Nippon Steel Corporation | Threaded joint for oil-well pipe |
US4835819A (en) * | 1986-09-15 | 1989-06-06 | Nylok Fastener Corporation | Coated fasteners and process for making the same |
US4917601A (en) * | 1989-02-02 | 1990-04-17 | Professional Learning Programs, Inc. | Orthodontic expansion screw appliance |
US5221170A (en) * | 1986-09-15 | 1993-06-22 | Nylok Fastener Corporation | Coated threaded fasteners |
US6156392A (en) * | 1999-07-13 | 2000-12-05 | Nylok Fastener Corporation | Process for triboelectric application of a fluoropolymer coating to a threaded fastener |
US20060171795A1 (en) * | 2005-01-28 | 2006-08-03 | Cromwell Stephen D | Substantial embedment of metallic debris |
US20070054052A1 (en) * | 2005-06-01 | 2007-03-08 | Gregory Alaimo | Fluoropolymer coating compositions for threaded fasteners |
US20100178422A1 (en) * | 2003-01-09 | 2010-07-15 | Maxtor Corporation | Encapsulation of particulate contamination |
US20110081220A1 (en) * | 2009-10-02 | 2011-04-07 | Illinois Tool Works Inc. | Fastener and method of prolonging use of a driver blade in a fastening tool |
US20170298970A1 (en) * | 2014-09-30 | 2017-10-19 | Lisi Aerospace | Fastener using lubricated interference fit |
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Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3234758A (en) * | 1959-10-08 | 1966-02-15 | Gen Motors Corp | Drive shaft slip spline assembly |
US3159577A (en) * | 1959-12-23 | 1964-12-01 | Gulf Research Development Co | Grease containing polytetrafluoroethylene |
US3194762A (en) * | 1961-06-12 | 1965-07-13 | Int Harvester Co | Extreme pressure lubricant and method for making the same |
US3247116A (en) * | 1961-11-07 | 1966-04-19 | Duriron Co | Lubricants containing degraded polytetrafluoroethylene |
US3526593A (en) * | 1964-01-02 | 1970-09-01 | Chevron Res | Pipe thread sealant containing polytetrafluoroethylene |
US3462175A (en) * | 1965-04-20 | 1969-08-19 | Sonel | Connector for unthreaded pipe,and method of making the same |
DE1272479B (en) * | 1965-06-14 | 1968-07-11 | Falkensteiner Gardinen Und Spi | Dry lubricant for reel machines |
US3437630A (en) * | 1965-12-20 | 1969-04-08 | Baker Oil Tools Inc | Thread sealing composition |
US3437593A (en) * | 1966-05-25 | 1969-04-08 | Peter N Bellavin | Antiseize sealing compound |
US3879302A (en) * | 1973-07-10 | 1975-04-22 | Ebert Michael | Fluorocarbon-based sealing compound |
US4548960A (en) * | 1978-10-17 | 1985-10-22 | Unasco Pty. Limited | Pipe jointing compounds |
US4213868A (en) * | 1978-10-27 | 1980-07-22 | Witco Chemical Corporation | Galvanic corrosion prevention coupling |
US4692988A (en) * | 1986-08-19 | 1987-09-15 | Nowsco Well Service (U.K.) Limited | Screw thread protection |
US4835819A (en) * | 1986-09-15 | 1989-06-06 | Nylok Fastener Corporation | Coated fasteners and process for making the same |
USRE33766E (en) * | 1986-09-15 | 1991-12-10 | Nylok Fastener Corporation | Coated fasteners and process for making the same |
US5221170A (en) * | 1986-09-15 | 1993-06-22 | Nylok Fastener Corporation | Coated threaded fasteners |
US4830411A (en) * | 1987-02-23 | 1989-05-16 | Nippon Steel Corporation | Threaded joint for oil-well pipe |
US4917601A (en) * | 1989-02-02 | 1990-04-17 | Professional Learning Programs, Inc. | Orthodontic expansion screw appliance |
US6156392A (en) * | 1999-07-13 | 2000-12-05 | Nylok Fastener Corporation | Process for triboelectric application of a fluoropolymer coating to a threaded fastener |
US20100178422A1 (en) * | 2003-01-09 | 2010-07-15 | Maxtor Corporation | Encapsulation of particulate contamination |
US8182868B2 (en) | 2003-01-09 | 2012-05-22 | Maxtor Corporation | Encapsulation of particulate contamination |
US20060171795A1 (en) * | 2005-01-28 | 2006-08-03 | Cromwell Stephen D | Substantial embedment of metallic debris |
US20070054052A1 (en) * | 2005-06-01 | 2007-03-08 | Gregory Alaimo | Fluoropolymer coating compositions for threaded fasteners |
US20110081220A1 (en) * | 2009-10-02 | 2011-04-07 | Illinois Tool Works Inc. | Fastener and method of prolonging use of a driver blade in a fastening tool |
US20170298970A1 (en) * | 2014-09-30 | 2017-10-19 | Lisi Aerospace | Fastener using lubricated interference fit |
US10544815B2 (en) * | 2014-09-30 | 2020-01-28 | Lisi Aerospace | Fastener using lubricated interference fit |
US11560910B2 (en) | 2014-09-30 | 2023-01-24 | Lisi Aerospace | Fastener using lubricated interference fit |
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