JPS59129293A - Lubricating oil for power transmission equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricating oil for a power transmission device. (Details) In particular, it relates to lubricating oil used in traction drives.

Gear devices and hydraulic devices have traditionally been used to transmit power or change speeds, but a drive method called traction drive (rolling friction drive device) that uses point contact or line contact between rotating rigid bodies is also known. It is beginning to be put into practical use in some industrial machinery because it does not involve meshing, produces little vibration during operation, and has high power transmission efficiency.

In this case, the lubricating oil that is most suitable from a functional standpoint must be selected as the oil present in the contact portions of the device. In other words, the oil present in the contact area undergoes a reversible glass transition under high pressure and its viscosity changes, which has a large power transmission effect on the rotating contact surface, and immediately returns to a fluid state when the contact surface is rotated. property and prevent direct contact between metal objects, prevent seizure, wear and fatigue damage,
It must also have the same important effects as general lubricants, such as rust prevention and cooling.

Friction or traction drive devices for power transmission have been described in many prior technical documents, such as U.S. Pat.
1.3CiQ specification, Journal of Chemical
& Engineering Data Vol. 5 No. 4 No. 49
9 to 507, and the proceedings of a symposium on rolling contact phenomena by Huco et al., pages 157 to 185 [Nilsepia Publishing Co., Amsterdam, 1962].

As lubricating oils for traction drives, mineral oil (Japanese Patent Publication No. 39-24, No. 635), mixed oil of dialkyl aromatic hydrocarbon and diallyl alkane (Japanese Patent Publication No. 47-40.
525@), polymethyl methacrylate (Special Publication 1972-
31,828), pivalic acid monoester (Special Publication No. 4
9-11,309), halogenated alkylnaphthalenes (Special Publication No. 16,900/1982), adamantanes (
Special Publication No. 4B-42,067 and No. 4g-42,06
A large number of such compounds have been proposed, including polyrefine (Japanese Patent Application Laid-open Nos. 46-4.76G and 47-2,229), and alkylnaphthalenes (US Pat. No. 2,549,377).

There are also many proposals regarding naphthenic oils having hydrogenated rings. Such naphthenic oils include dicyclohexylethane (Japanese Patent Publication No. 48-29.715), dicyclohexylpropane (Japanese Patent Publication No. 53-36.105), and hydrogenated condensed ring compounds (U.S. Patent No. 3,411,36).
No. 9), naphthenes with one or more saturated carbon-containing rings (U.S. Pat. No. 3,440,894), naphthenes with two or more saturated carbon-containing rings (U.S. Pat. No. 3,925)
, 217), mixed oils of naphthenes and paraffins (U.S. Pat. Nos. 3,595,796 J5 and 3,595.7)
No. 97) etc. In addition, JP-A No. 55-43.108 summarizes and introduces these prior art in a concise manner, and describes the process of hydrogenation of the alkylation reaction product of xylene and/or 1-toluene with styrene. It is said that hydrogenated 1,1-diallylethane compounds (mainly hydrogenated 1,1-diallylethane compounds) are superior among naphthenic oils.

However, the aforementioned U.S. Pat. No. 3,411.36'Jq
includes a wide range of naphthenic compounds and exemplifies many naphthenes, but does not disclose hydrogenated diallylmethane hydrocarbons.

It can be seen from these prior art documents that naphthenic oils having hydrogenated rings generally exhibit excellent properties as lubricating oils, especially lubricating oils for 1-action drives. However, the fact that many similar patents have been filed and each patent has been granted, which means that even if nanotene-based oils are generally effective, depending on the type, the This means that many compounds have been found whose performance in lubricating applications has changed and whose performance has been unpredictable.

Therefore, an object of the present invention is to provide a novel lubricating oil for power transmission devices. Another object of the present invention is to provide a lubricating oil for power transmission devices that not only has excellent performance such as traction properties, oxidation stability, and corrosion resistance, but also can be easily synthesized using inexpensive raw materials. Our goal is to provide the following.

In these various terms, one allyl group is a monocyclic hydrocarbon group, and the other allyl group has a skeleton obtained by hydrogenating diallylmethane, which is a condensed ring hydrocarbon group, and has a carbon number of 16. ~21 hydrocarbon compound with l-action coefficient of 0.08 or more and oxidation stability or rotary cylinder type of 20
This is achieved by a lubricating oil for a power transmission device that uses a hydrocarbon compound having a molecular weight of 0 to 12 minutes.

That is, it has been discovered that a specific hydrogenated diallylmethane is uniquely effective for the purpose of the present invention due to its molecular structure.

Examples of the hydrogenated diallylmethane hydrocarbon compound that is the main component of the lubricating oil for power transmission devices according to the present invention include compounds represented by the following general formula.

Here, R is a methyl group or an edyl group, which may be the same or different, and 1) or m is 1 of 0.1 or 2.
The number is 1. Then, the total number of carbon atoms is selected from 16 to 21.

The compound represented by this general formula has a good traction coefficient and oxidation coefficient, but the compound used in the present invention has a traction coefficient of 1, 08J, and an oxidation stability of 2QO in a rotary cylinder type. Minutes or more, you need to set the value to the right value. 1- If the traction coefficient is lower than 0.08, the performance as a lubricating oil for a power transmission device will be poor. In addition, as another property of (/IQ"C, the dynamic viscosity of Δ3U is 10 to 10
0 c st , preferably 10 to 50 cS[, and a pour point of 0'c or less, preferably -10'C or less.

Here, the traction coefficient refers to the value measured as shown in the figure below.Test equipment: Soda type cylindrical friction test! Machine A test piece cylindrical grain bearing m 5UJ-2 hard 1i Hv 7
60-800 dimensions Outer cylinder 40mmx9mm Inner cylinder 4. Q m1llX 5111111 (diameter x width) Lubrication method Dripping method Flow rate Approx. 10mλ/mi
nSupplied oil temperature 28℃ Average Hertzian pressure horn 1.157GPa Rotational speed f'1
4.19m/sec edge rate
0.5% In addition, the oxidation stability was determined by adding 0.3% by weight of 2,6-di-tertiary-butyl para-cresol as an antioxidant to the hydrogenated hydrocarbon compound to determine the JISK-2514-
Refers to the oxidation life evaluated according to Section 3.3 of 82 [Rotating cylinder oxidation stability test] at a temperature of 150°C, an initial pressure of 6.3 kg/cm2, and a catalyst of TFe and C1l. Unless this oxidation stability is 200 minutes or more, it cannot be used for a practical period.

Examples of hydrocarbon compounds suitable as the lubricating oil for power transmission devices of the present invention include benzene or 1-toluene as the monocyclic hydrocarbon that forms one allyl group, and a fused ring hydrocarbon that forms the other allyl group. is a hydrocarbon compound having a skeleton that can be formed by hydrogenating diallylmethane, which is naphthalene, methylnaphthalene, indene or acenaphthene.

These compounds include fused aromatics such as halogenated pencil or halogenated (methyl)benzyl, naphthalene, methyl nanotalene, intene or acenaphthene.
jq can be obtained by hydrogenating diallylmethane obtained by reacting N hydrocarbon in the presence of a Friedelkraff catalyst. Hydrogenation catalysts include platinum, palladium, and rhodium.

Rudenium or nickel catalysts are preferred. The hydrogenation rate is at least 80%, preferably 9.96% or more, and more preferably 95% or more. It is difficult to carry out hydrogenation until the hydrogenation rate of unsaturated bonds reaches 99% or more, but even if a small amount of unsaturated bonds exists, the purpose of the present invention is unlikely to be impaired. , it doesn't have to take that long.

When the desired hydrogenation rate is obtained, the reaction is stopped and the hydrogenated hydrocarbon compound is separated. This separation can be done by simply removing the catalyst, and if necessary, the usual lubricating oil treatment FJI method such as activated clay treatment before filtration can also be used.
Distilled in some cases. However, since it is difficult to separate completely hydrogenated diallylmethane from hydrogenated diallylmethane and partially hydrogenated diallylmethane by distillation or separate the isomers from each other, the low θ1j point is a by-product. There are few advantages of the distillation method except when the hydrocarbon compound of the present invention is produced.Also, there is no problem in the presence of small amounts of by-products produced during the process of producing the hydrocarbon compound of the present invention.

The lubricating oil for power transmission devices according to the present invention uses at least one of the above-mentioned hydrogenated hydrocarbon compounds having a lJ diallylmethane skeleton, and in addition, a viscosity modifier, a diluent, etc. There is no problem in containing mineral oil, other naphthenic oil, etc. as long as the above-mentioned traction coefficient and oxidation stability are maintained. It is also natural that the lubricating oil for power transmission devices may contain additives such as antioxidants, corrosion inhibitors, rust inhibitors, anti-wear agents, dry maro index improvers, antifoaming agents, etc. . For example, in addition to the above-mentioned properties 1 to 1, the properties required of a lubricating oil for traction drives include oxidation stability, viscosity temperature characteristics, and corrosion resistance required of general lubricating oils.

These properties include abrasion resistance, anti-leaving properties, rubber swelling properties, anti-foaming properties, etc., and it is necessary to mix appropriate additives according to each use. Here, the compounds according to the invention include:
These additives include, for example, argyl phenols such as 2,6-theta cidal butylvala cresol as antioxidants, sulfur and phosphorus compounds such as zinc dialkyldidiyl phosphate, amines, esters, and metal salts as anti-W S agents. of,
It is possible to add polymethacrylates as a viscosity index improver and silicone polymers as an antifoaming agent.

Next, the present invention will be explained in detail with reference to Examples. In addition, "parts" in the following examples are based on weight unless otherwise specified.

4 parts of the condensed polycyclic aromatic hydrocarbon compound of the example and 1 part of benzyl chloride were reacted for 1 hour at a reaction temperature of 70 to 100 DEG C. using 0.01 part of aluminum chloride as a catalyst. The reaction product was then washed with water to remove the catalyst, and then distilled to separate unreacted substances.

The obtained diallylmethane (isomer mixture) was fed into a crepe to O 1, and heated to a pressure of 50 mm using a nickel catalyst.
~100kg/C mouth 12, ζS9 degree 100~18
The hydrogenation reaction was carried out at 0'C for about 5 hours to obtain hydrogenated diallylmethane A, B, C and D represented by the following general formula. This Shino's general normality is shown in Table 1.

Adding 2,6 to the hydrogenated diallylmethane as an antioxidant
- A lubricating oil for traction drive was prepared by adding 0.3% by weight of di-tert-butyl para-cresol.

This lubricating oil was subjected to measurement of traction coefficient and oxidation stability test under the conditions described above. The results are shown in Table 2.

Table 1 - Membrane properties Hydrogenated dia
25.7G 3.77 0.91 -27.
5B 10.70 2. GO0,93<-50
CI7,89 3,34 0.93 -37.
5D 40.25 5.34 0.97
-27.5 Table 2 Traction Coefficient and Oxidation Provision Hydrogenation Shear Traction Coefficient of Lumethane Distributed by Rotating Cylinder
0.087 320B O,086
222 C0,089305 D 0.093 203 Comparative Example Hydrogenating a condensed polycyclic aromatic compound to obtain 1q et al. A commercially available synthetic traction drive lubricant was tested in the same manner as in the example. The results of 1+ results are shown in Table 3.

3rd surface kinematic viscosity (cSt)
100 'C Coefficient Miya''L'l'l'Hydrogenated Nanotalene 1.85 - 0.06 Hydrogenated A is Naphthene -1,50,065 Hydrogenated Fethyne 1~Ren 6.4 2.10.0Ci5 Mizuki Kaan 1 ~ Spiral solid -- Lubricating oil for I-traction drives prepared from nanoten mineral oil 9.8 2. A O, 05130α
-Methylstyrene linear diconic hydrogen compound system 1~ Lubricant oil for traction drives 30,3 5.5 0,09. 18
0Special applicant: Nippon Steel Chemical Industry Co., Ltd. Mitsubishi Oil Co., Ltd. Teitouri Neichij ■ Maro Showa 58'J ``February 24'' I special case Indication of 1981 Patent Application No. 4,206 Bow 2, Name of the invention Dynamic horn transmission device 6 River A 8 Juice 1 Oil 3, ?l 111 Relationship with A'1 Patent No. 6'F Applicant Address: 6-17-2Ginza, Chuo-ku, Tokyo Name:
(Gf34) New Japan V, chemical industry stock trial (Idiot 1
Name) Representative This month Omuro 5, "1 I" of the amendment order Voluntary amendment r II "I Subdivision 70 Subdivision 01 J4 Correction ■ 1 Explanation 1 column 35 shishi ≥\゛\6, Supplementary IJl: Target 7 , the details of the correction are as follows: a3.

(1) Page 3, line 15 "Polyrefin" Corrected to "Polyrefin."

(2) Page 5, line 6 "For lubrication" Corrected as "lubricating oil" (3) Page 7'f55 line [oxidation coefficient j, Corrected to "oxidation stable 1 odor".

(4) Page 10, line 11 "Low boiling point" “Low boiling point component” and revised IE 0 (5) Page 11, line 3 "Mukai" two (2), Corrected as "enhancing agent."

6) Page 11, line 14 "Preservative" (7) 12th @ 13th line "General normality" Corrected as “-membrane properties.”

(8) On page 12, line 4, "4 parts of compound" was corrected to "4 parts of compound (methylnaphthalene, indene, nophthalene or arenaphthene)".

*Correct the third person listed in lines 15 and 16 as shown in the attached sheet.

Table 3

Claims (2)

[Claims] (1) One allyl group is a monocyclic hydrocarbon group, and the other allyl group is a condensed ring hydrocarbon group, by hydrogenating diallylmethane (having a skeleton with a carbon number of 16 to 21
is a hydrocarbon compound with a traction coefficient of 0.0
A 7/l lubricating oil for power transmission devices using a hydrocarbon compound with an oxidation stability of 8 or more and an oxidation stability of 20'O or more in a rotary cylinder type. (2) The monocyclic hydrocarbon is benzene or toluene, and the fused ring hydrocarbon is naphthalene, mediyl nanotalene,
Claim 1 which is indane or acenaphthene
Lubricating oil for power transmission devices as described in .