Classifications

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  • 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
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  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/02—Water
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  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/06—Metal compounds
  • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/06—Metal compounds
  • C10M2201/063—Peroxides
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  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/10—Compounds containing silicon
  • C10M2201/102—Silicates
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  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/10—Compounds containing silicon
  • C10M2201/105—Silica
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
• • 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
  • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
  • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
• • 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
  • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
  • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
  • C10M2203/108—Residual fractions, e.g. bright stocks
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  • 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
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/14—Synthetic waxes, e.g. polythene waxes
• • 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
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/16—Paraffin waxes; Petrolatum, e.g. slack wax
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  • 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
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/17—Fisher Tropsch reaction products
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  • 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
  • C10M2207/02—Hydroxy compounds
  • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
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  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
• • 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
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/129—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of thirty or more carbon atoms
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  • 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
• • 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
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  • 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
  • C10M2207/402—Castor 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
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
• • 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
• • 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
  • C10M2223/041—Triaryl phosphates
• • 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
• • 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
  • C10M2223/06—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds
  • C10M2223/065—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds containing sulfur
• • 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
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/04—Groups 2 or 12
• • 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
• • 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
  • C10N2060/00—Chemical after-treatment of the constituents of the lubricating composition
  • C10N2060/04—Oxidation, e.g. ozonisation

Definitions

• This invention relates to aprocess for the preparation of calcium soap greases. More: particularly it is concerned with a process for the production of greases containing substantial amounts of wax whereby the required calcium soap content is minimized.
• the first type of grease comprises calcium soaps mixed with calcium salts of low aliphatic acids such as calcium acetate. wherein. the salt and soap appear to exist in a complex relationship enabling the use of the greases made therefrom at relatively high. tem peratures. Such greases contain substantially no water.
• the low temperature: greases" gelled with calcium soaps contain no calcium salts for stabilization butdepend upon the presence of water to form a hydrate of the soap which in turn comprises the crystal lattice forming the basis of these' greases.
• This invention is concerned with the second type of grease and does not relate to calcium acetatestearatev greases and the like.
• Waxes and similar substances have been added to various greases to improve properties such as high temperature performance bleeding, and other characteristics. For the most part these have been greases. gelled with soaps other than calcium but certain calcium soap greases have been prepared incorporating either macrocrystalline or microcrystalline waxes. In such greases the normal procedure has been to incorporate the wax and other grease ingredients prior to formationofi a grease structure. Under these conditions'the greases so formed have been excessively soft or have required additional components to maintain a proper grease structure. For example, such major componentsv as turpentine have: been added or additives in substantial quantities have been employed 7 such as oil-soluble wetting agents. Other materials which have: been.
• incorporatedv to overcome the soft character of suchgreases include; free fatty acids in amounts up tov 1.0% or wool grease in amounts up to. 4% andvegetable oils in. quantities of approximately 35%.
• Greasemade under. the conditions of. wax incorporation prior to grease formation require as much or more calcium soap in the final product asv is necessary in ordinary calcium. greases.
• a calcium soap lubricating grease can be obtained when a primary lubricating grease formed from a mineral lubricating oil and a calcium soap is mixed below its dropping point with a paraflin Wax having. a melting point above about 50 C,-
• the temperature is still ICC 2 further limited in that it is necessary to commingle the grease and wax at a temperature above the melting point of the wax.
• the process Essentially the. process of the present invention comprises first. forming a. normal calcium grease using a calcium soap to gel a mineral lubricating oil. Subsequently this grease, referred to herein as primary calcium lubricating grease, is cornrningled. with. a hydrocarbon wax at a temperature below the dropping point of the grease but above the. melting point of the wax. Ordinarily thisv temperature of'mixing will be between about r'oomtemperature. and. C. Preferably it is between about 20 and 60 C. However, if high temperature waxes are employed or if. especially stiff greases are utilized, it may be necessary to operate at a somewhat higher temperature above 60 C. but below about 100 C. In this case the mixture of grease and wax should be subjected to shearing at least until the mixture has been cooled to a temperature of 60 C.
• a preferred process comprises heating the wax to a temperature above its melting point and thereafter mixing it by means of stirringwiththe primary calcium grease, the latter being at ordinary room temperatures (usually 20-30 C.).
• An alternative additional feature of this invention comprises the incorporation of inorganic colloidal gels;
• the point at which such incorporation occurs is optional but preferably is effected by incorporating the colloidal gel in lubricating oil prior to the formation of the primary calcium grease structure;
• the primary calcium greases to be utilized in the compositions prepared according to-this invention comprise those containing up to about 310% by weight of calcium soaps of higher fatty acids. These. may be calcium soaps of a single fatty acid or of mixtures such as those derived from the hydrolysis of. natural fat. and. oils.
• the fatty acids should. contain at least 12 carbon atoms per molecule andusually willcomprise mixtures of fatty acids having from 12 to 24 carbon atoms per molecule.
• These acids may be either saturated or unsaturated and include such species as oleic, linoleic, linolenic, stearic, 12-hydroxy' stearic, and similar fatty acids or hydroxy fatty acids well-known for their soap-forming and grease-forming properties. It is preferred that the major proportion of the lubricating oil component of such primarygreases is a hydrocarbon oil of ordinary lubricating viscosity range. Minor amounts of modifying substance may be present to. improve properties such as.
• Such minor components may comprise phosphorus containing esters including tricresyl phosphate; trioctyl phosphate; dihexyl hexane phosphonate; dihexyl benzene phosphonate; di(3,5,5-trimethylhexyl) iso-octene phosphonate; bis- [2-(dioctyl phosphono)ethyl]ether; bis[2-(dinonyl phosphono)-ethyl]ether; 1,5-pentanediol bis(dibutyl phosphate), and 1,5-pentanediol bis(dioctyl phosphate).
• esters including tricresyl phosphate; trioctyl phosphate; dihexyl hexane phosphonate; dihexyl benzene phosphonate; di(3,5,5-trimethylhexyl) iso-octene phosphonate;
• esters may also be employed, such as the esters formed between monohydric alcohols and dicarboxylic aliphatic acids.
• a typical member of this group is bis(2-ethylhexyl)sebacate.
• polymeric lubricants such as oxyalkylene polymers may be utilized. It is preferred that the proportion of these modifying lubricants be held to a minimum and preferably to less than about by weight of the final composition.
• the lubricant component consists essentially of a mineral lubricating oil.
• the primary calcium grease should contain an amount of water at least sufiicient tov provide the grease with a suitable grease-like structure.
• the waxes to be incorporated in accordance with the process of this invention comprise hydrocarbon waxes having melting points above about C. and preferably between about and about C. If waxes having lower melting points are employed the final grease composition is limited in its utility due to undue softness of the composition at moderately elevated temperatures.
• the waxes may be either macroor microcrystalline paraffin waxes obtained in the normal manner from waxy petroleum distillates or residues or may be the waxy residues remaining from the preparation of alkenes by the cracking of heavy paraflin hydrocarbons.
• a special variety of wax which has been found to have a particularly effective utility comprises the high melting point wax having melting points above C.
• Such waxes are obtained by the fractionation of waxes from heavy lubricating oil distillates or by fractionation of residual waxes. They are usually associated with microcrystalline waxes in residual wax mixtures prior to their separation.
• the preferred high melting point parafiin waxes are those having a substantially unbranched or only slightly branched structure as opposed to the highly branched or cyclic structures occurring in microcrystalline waxes of the same melting point.
• compositions of this invention comprise those having the following ingredients:
• Parafiin wax 25-67% (preferably 40 55%) by weight.
• Calcium soap 410% (preferably 4 7%) by weight.
• Water 0.33% (preferably 0.5-
• hydrophobic active agents may be used to overcome this eifeet but for the most part these have comprised high molecular weight amines and the like.
• the gels may be present in amounts up to about 10% by weight of the final grease composition.
• the type of colloidal structure suitable for use in such greases is exemplified by a typical aerogel although the usual process for preparing inorganic aerogels is not required.
• the gels should have a maximum particle size of millimicrons.
• Typical gels include the metallic oxides and hydroxides as well as silicates and mixtures of these classes. Suitable species are silica, magnesia, calcium hydroxide, magnesium silicate and mixtures of magnesium silicate, silica and magnesia. It has been determined that greases containing both inorganic colloidal gels and the particular waxes of the present invention provide normal calcium greases with exceptionally beneficial properties including elevated dropping points and resistance to disintegration by the action of water. It would appear to be a cooperative action between the calcium soap and the substantial amounts of waxes present in these compositions which enable the inorganic gel to resist the deleterious action of the water component. This is especially true if the high melting point waxes referred to herein before are employed. Preferably the inorganic colloidal gels are present in an amount less than about 10% by weight of the final composition and appreciably improved dropping points may be obtained by the addition of as little as 1% by weight of the final compositions.
• Examples I and II illustrate the fact that when paratfin wax is added to the base oil, before the latter has formed a grease structure with the soap, only a thick fiuid mass having no lubricating properties is obtained.
• Examples HI through VII refer to the process according to the present invention.
• a mixture of commercial fatty acids which consists of about 60% by weight of oleic acid and of about 40% by weight of
• the product obtained is a fluid mass which does not have the structure of a lubricating grease at all.
• the mass is slightly acidic.
• a fluid mass is again obtained which is slightly alkaline. Moreover, after a time, the calcium soap settles out.
• This mixture is saponified in the manner indicated in the preceding examples. Afterwards the mass is cooled, whilst being stirred, to 80 C. and 102 parts by weight of the paraflinous cracked residue, as used in the preceding examples, is then added to the primary calcium lubricating grease thus obtained.
• This cracked residue had previously been heated to a temperature of 70 C., at
• Example IV --A calcium lubricating grease, prepared in the same way as the primary calcium lubricating grease of Example III, is placed, at room temperature in an open agitator with an amount equal to it of the same paraifinous cracked residue as used in the preceding examples.
• This cracked residue had previously been heated to 70 C. and is therefore in a fluid state.
• the mixture of the original calcium grease and the cracked residue is stirred until the temperature falls to 40 C., a good, rather darkly coloured, lubricating grease having the following properties being obtained:
• Example VI.-A calcium lubricating grease prepared in the same way as the primary calcium lubricating grease of Example III, is placed, at room temperature in an open agitator and heated whilst being stirred to 75 C. Afterwards, again in course of stirring, an equal amount by weight of a microcrystalline wax with a melting point of 71 C. is slowly added. The paraffin wax had previously been heated to 80 C. and is therefore in a fluid state. The mixture obtained is finally stirred again whilst being cooled until a temperature of 40 C. is reached.
• Example VII.--The composition according to Example III can be modified by the incorporation of 2-8% by tact of 'the finalcomposition with water even upon prolonged contact.
• a grease composition prepared according to the process of claim 1 said pre-formed grease consisting essentially of a gelling proportion of calcium soaps of higher aliphatic monocarboxylic acids and a mineral lubricating oil, the soap content of the final wax-containing grease being between 4% and 10% by weight.
• a grease composition prepared according to the process of claim 2 said pre-formed grease consisting essentially of a gelling proportion of calcium soaps of higher aliphatic monocarboxylic acids and a mineral lubricating oil, the soap content of the final wax-containing grease being between 4% and 10% by weight.

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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)

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  • BE BE510080D patent/BE510080A/xx unknown
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• 1952
  • 1952-02-25 US US273360A patent/US2854409A/en not_active Expired - Lifetime
  • 1952-03-20 FR FR1058929D patent/FR1058929A/fr not_active Expired
  • 1952-03-20 GB GB7193/52A patent/GB708982A/en not_active Expired
  • 1952-03-21 DE DEN5245A patent/DE942525C/de not_active Expired

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