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    Bis (chlorophenyl)-tetramethyl-disiloxanes
    404.
    发明授权
    Bis (chlorophenyl)-tetramethyl-disiloxanes 失效
    双（氯苯基） - 四甲基 - 二硅氧烷

    公开(公告)号：US2891981A

    公开(公告)日：1959-06-23

    申请号：US53788855

    申请日：1955-09-30

    Applicant: WESTINGHOUSE ELECTRIC CORP

    Inventor： GAINER GORDON C ,  LEWIS DANIEL W

    IPC: C07F7/08 ,  C07F7/12 ,  C07F7/18 ,  C08G77/00

    CPC classification number: C08G77/00 ,  C07F7/085 ,  C07F7/122 ,  C07F7/184 ,  C07F7/1844 ,  C10M2201/00 ,  C10M2201/041 ,  C10M2201/042 ,  C10M2201/061 ,  C10M2201/065 ,  C10M2201/066 ,  C10M2201/08 ,  C10M2201/081 ,  C10M2201/082 ,  C10M2201/084 ,  C10M2201/102 ,  C10M2201/105 ,  C10M2201/16 ,  C10M2201/18 ,  C10M2207/09 ,  C10M2215/14 ,  C10M2227/04 ,  C10N2210/01 ,  C10N2210/02 ,  C10N2240/08

    Abstract: A liquid organopolysiloxane is made by hydrolysing and condensing either (1) at least one silane of the formula where X is selected from chlorine, bromine, fluorine and halophenoxy radicals, m is an integer from 1 to 5, Y is a hydrolysable radical and n is 1 or 2, or (2) a mixture of 1 mol. of the above silane and 1 to 49 mols. of a silane of formula R2-Si-Y2, where R is a monovalent radical selected from methyl and phenyl radicals, the phenyl radicals not exceeding the number of methyl radicals. The resulting liquid polymers may be mixed in amount of at least 0.1 per cent. by weight with liquid organo-polysiloxanes of the formula R(2a+2)-SiaO(a-1) where each R is an alkyl, cycloalkyl, aryl, alkaryl or aralkyl radical, a major proportion of the radicals being either methyl or methyl and phenyl radicals and the latter, if present, comprising at least 10 per cent. of the R radicals, and a is at least 2. The liquid polymers may be stabilized with the metal chelates as disclosed in Specification 630,319, and may be mixed with 1 to 100 per cent. of solid lubricant materials, e.g. molybdenum disulphide, silver sulphate, tungsten sulphide and boron nitride, and with fillers, e.g. colloidal silica, talc, titania, mica powder, zinc oxide and graphite. Examples disclose the preparation of bis(p-bromophenyl)-, bis(p-chlorophenyl)-, bis(p-fluorophenyl)-, bis(p-chlorophenoxyphenyl)-, bis(p-bromo-phenoxyphenyl)-and bis(p-fluorophenoxyphenyl)-disiloxanes and corresponding polysiloxanes tetramethyl. The liquids, pastes or greases may be used as lubricants, and the liquids may be used as power transmission media in hydraulic machines. Specification 544,143 also is referred to.ALSO:A liquid organopolysiloxane is made by hydrolyzing and condensing either (1) at least one silane of the formula where X is selected from chlorine, bromine, fluorine and halophenoxy radicals, m is an integer from 1 to 5. Y is a hydrolyzable radical and N is 1 or 2, or (2) a mixture of 1 mol of the above silane and 1 to 49 mols of a silane of the formula R2-Si-Y2, where R is selected from methyl and phenyl radicals, the phenyl radicals not exceeding the number of methyl radicals. Examples disclose the preparation of bis (p-bromophenyl)-, bis (p-chlorophenyl)-, bis- (p-fluorophenyl)- and the corresponding bis (halo-phenoxyphenyl)-tetramethyldisoloxanes. The above silane (1) may be made by reacting magnesium in ether with a polysubstituted benzene compound, wherein one of the substituents will react with magnesium to form a Grignard reagent the other substituent(s) on the benzene ring being selected from chlorine, bromine, fluorine and halophenoxy radicals, and admixing one mol of the Grignard reagent thus formed with at least 1 mol of a methyl silane having not more than 2 methyl radicals, the remaining radicals being hydrolyzable. Alternatively, the polysubstituted benzene compound may be added slowly to the magnesium in ether, with subsquent refluxing of the mixture and separation of the required silane. Polysubstituted benzenes specified are o-, m- and pdibromo-, trichlorobromo-, difluoroiodo-, 1-chloro-2-fluoro-4-bromo-, 4-bromo- (p-chlorophenoxy)-, tetrabromo-iodo- and pentachlorobenzenes. Examples disclose the preparation of p-bromo-, p-chloro- and p-fluorophenyldimethylchloro-and ethoxy silanes, the corresponding methyldichloro- and diethoxy silanes, and p-chlorophenoxyphenyldimethylchlorosilane.ALSO:A lubricating composition comprises a polysiloxane made by hydrolyzing and condensing at least one silane of the formula where X is selected from chlorine, bromine, fluorine and halophenoxy radicals, m is from 1 to 5, Y is a hydrolyzable radical and n is 1 or 2, with or without a silane of the formula R2SiY2, where R is selected from methyl and phenyl radicals (see Group IV (a)). The liquid polymers may be mixed in amount of at least 0.1 per cent. by weight with liquid polysiloxanes of the formula R (2a+2) Sia O(a-1) where each R is an alkyl, cycloalkyl, aryl, alkaryl or aralkyl radical and a is at least 2, or they may be stabilised with the metal chelates as disclosed in Specification 630,319, (Group IV (a)). Solid lubricant materials, e.g. molybdenum disulphide, silver sulphate, tungsten sulphide, and boron nitride may be added in amounts of 1 to 100 per cent. of the liquid polymers, and fillers, e.g. colloidal silica, talc, titania, mica powder, zinc oxide and graphite may also be added.

    SLIDING SYSTEM
    409.
    发明申请
    SLIDING SYSTEM 审中-公开

    公开(公告)号：US20170247625A1

    公开(公告)日：2017-08-31

    申请号：US15417452

    申请日：2017-01-27

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Hiroyuki MORI ,  Mamoru TOHYAMA ,  Masaru OKUYAMA ,  Keiji HAYASHI ,  Naoya IKEDA

    IPC: C10M125/22 ,  C10M125/08

    CPC classification number: C10M125/22 ,  C10M125/08 ,  C10M135/18 ,  C10M2201/061 ,  C10M2201/066 ,  C10M2219/068 ,  C10N2210/06 ,  C10N2230/06 ,  C10N2270/00 ,  C10N2280/00

    Abstract: [Technical Problem] An object is to provide a sliding system which can achieve both the reduced friction and the enhanced wear resistance by means of a novel combination of a sliding film and a lubricant oil.[Solution to Problem] The sliding system of the present invention comprises: a pair of sliding members having sliding surfaces that can relatively move while facing each other; and a lubricant oil interposed between the sliding surfaces facing each other. At least one of the sliding surfaces comprises a coating surface of a crystalline chromium carbide film. The lubricant oil contains an oil-soluble molybdenum compound that has a chemical structure of a trinuclear of Mo. When the chromium carbide film as a whole is 100 at %, the chromium carbide film contains 40-75 at % of Cr. The chromium carbide film in contact with the lubricant oil containing a Mo-trinuclear appears to react with the Mo-trinuclear adsorbed during the sliding to generate a layered structural body (boundary film) similar to MoS2 on the surface, thereby developing a considerably low friction property.

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