CN1015376B - Binary carboxylic asid double ester constutuent for instrument oil - Google Patents
Binary carboxylic asid double ester constutuent for instrument oilInfo
- Publication number
- CN1015376B CN1015376B CN 88108667 CN88108667A CN1015376B CN 1015376 B CN1015376 B CN 1015376B CN 88108667 CN88108667 CN 88108667 CN 88108667 A CN88108667 A CN 88108667A CN 1015376 B CN1015376 B CN 1015376B
- Authority
- CN
- China
- Prior art keywords
- alcohol
- acid
- constituent
- selecting
- present
- 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
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Abstract
The present invention relates to a bi-noncarboxylic acid diester composition for low temperature and no flowing instrument oil. The composition has the advantages of suitable viscosity, good low temperature (-54 DEG C) property, no flowing property, etc. The composition of the present invention is composed of at least one kind of acid selected from (a) C4 to C12 fatty dicarboxylic acid and a diester mixture derived by (b) two classes of alcohol, wherein the (b) two classes of alcohol comprise (1) benzyl alcohol or at least two kinds of alcohol selected from alcohol of C7 to C 18 containing aromaticring, and at least one kind of alcohol selected from (2)fatty monohydric alcohol of C3 to C13 with branched chains.
Description
The present invention relates to low temperature, not wandering binary carboxylic asid double ester constutuent for instrument oil.What more particularly, the present invention relates to is low temperature (54 ℃) performance and the good binary carboxylic asid double ester constutuent for instrument oil of non-Diaspora Performance.This constituent is by C
4～C
12At least a kind of acid selecting among the fat dicarboxylic acid and two classes alcohol deutero-diester mixture.
Various precision meters and clock and watch adopt stone bearing and miniature bearings usually.Its lubricated characteristics are, the lubricant housings is little, and is few with oil mass, and it is long once to assemble duration of service.Therefore, require jewel lubricating oil, except that the physicochemical property that should have general lubricating oil, also must have good not Diaspora Performance.These requirements can only be satisfied with ucon oil.
Known instrument ucon oil has the alcohol ether type, Etheric ester type and the alcohol ether that contain aromatic ring to answer ester type etc.Though these known ucon oils have good not Diaspora Performance etc., can satisfy the service requirements of the precision meter under the normal temperature condition, its low-temperature performance is relatively poor, the pour point height, and low temperature viscosity is big, is not suitable for the lubricated of low temperature jewel.
Be used for Aeronautics and Astronautics technical field and extremely cold geographic precision meter bearing, usually be under the extremely low temperature condition.Therefore, the lubrication problem of anxious low temperature jewel to be solved.
As everyone knows, dibasic acid esters is a kind of excellent lubrication oil.For example, the dibasic acid esters of the sebacic acid/isooctyl alcohol of single component has the many good physicochemical property (lubricity and low-temperature performance etc.) as lubricating oil.But Diaspora Performance is not relatively poor for it.
This shows that known instrument ucon oil or known Binary Carboxylic diester can't satisfy the lubricating requirement of low temperature jewel.
The purpose of this invention is to provide binary carboxylic asid double ester constutuent for instrument oil.This constituent can not only keep good not Diaspora Performance that known instrument ucon oil has etc.But also have the good performance of general dibasic acid esters lubricating oil, particularly good low-temperature performance.
We have finished the present invention through studying intensively.
Binary Carboxylic diester's constituent of the present invention is by (a) C
4～C
12At least a kind of acid selecting among the fat dicarboxylic acid and (b) two classes alcohol deutero-diester mixture.(b) two class alcohol comprise (1) benzyl alcohol or C
7～C
12Contain at least 2 kinds of alcohol selecting in the alcohol of aromatic ring, (2) C
3～C
13Prop up at least a kind of alcohol selecting in the chain fatty monohydroxy-alcohol.
In the above-mentioned constituent, the mol ratio that (1) alcohol is pure with (2) though there is no particular limitation, can be 9: 1～1: 9 usually, preferably 4: 1～1: 4.The performance of this ratios affect constituent, when ratio was excessive, Diaspora Performance was ungood, and poor performance at low temperatures; When ratio was too small, just in time opposite, low-temperature performance was good, and Diaspora Performance is not poor.
In the above-mentioned constituent, available (a) acid has Succinic Acid, pentanedioic acid, hexanodioic acid, 2,2,4-trimethyladipic acid, nonane diacid, sebacic acid and dodecanedioic acid etc.Usually, (a) acid can be from C
6～C
12Select among the fat dicarboxylic acid, preferably at least a kind of acid from hexanodioic acid, nonane diacid and sebacic acid, selecting.Alternative (1) alcohol has benzyl alcohol or benzyl alcohol, 2-phenoxyethyl alcohol, isopropyl benzyl alcohol, 2-benzyl octanol and 2-(isodecyl phenoxy group) at least 2 kinds of alcohol selecting in the ethanol etc.Usually, (1) alcohol can be benzyl alcohol or C
7～C
10Contain at least 2 kinds of alcohol selecting in the alcohol of aromatic ring, preferably the alcohol mixture of benzyl alcohol or benzyl alcohol and 2-phenoxyethyl alcohol.Alternative (2) alcohol has Virahol, primary isoamyl alcohol, isohexyl alcohol, isooctyl alcohol, isodecyl alcohol and different tridecanol etc.Usually, (2) alcohol can be from C
5～C
13Prop up in the chain fatty monohydroxy-alcohol and select, preferably at least a kind of alcohol from primary isoamyl alcohol, isohexyl alcohol and isooctyl alcohol, selecting.
Constituent of the present invention can be by the fat dicarboxylic acid of calculated amount, suitably excessive (common, for calculated amount 110～120%) the alcohol mixture and the appropriate amount of catalysts of two class alcohol, at solvent or solvent-free, normal pressure or decompression are carried out esterification one step to obtain under the condition of temperature 100～250 ℃ (best 110～200 ℃).Usually, catalyst for esterification reaction commonly used be can use, sulfuric acid and tosic acid etc. preferably used.If when using solvent, can use toluene and dimethylbenzene etc.In solvent-free reaction, can remove the water that generates in the esterification with nitrogen stripping or decompression.After reaction was finished, thick ester was through alkali cleaning and washing, and the topping that reduces pressure at last obtains product.
Constituent of the present invention also can prepare at least 2 dibasic acid esters or diester mixture respectively by above-mentioned preparation process earlier, they is obtained by the proper proportion blending again.
Constituent of the present invention has suitable viscosity and good low temperature properties, 100 ℃ of kinematic viscosity V
100Can reach 2.5mm
2More than/the S, for guaranteeing also normally to lubricate under-54 ℃, its pour point can reach below-60 ℃ ,-40 ℃ of kinematic viscosity V
-40Can reach 2,000mm
2About/S.Constituent of the present invention also has good not Diaspora Performance and higher surface tension.Therefore, constituent of the present invention achieves satisfactory results as low temperature instrument oil.
Constituent of the present invention has excellent adaptability to various common instrument oils with additive, as required, can contain anti-current loose additive, anticorrosive and oxidation inhibitor etc. usually.But selected additive must have good low-temperature (54 ℃) solubleness in constituent.
In order to further specify the present invention, enumerate following embodiment.
Embodiment 1
In the 1000ml there-necked flask of reflux water-dividing device, thermometer and agitator is housed, add 73g(0.5mol) hexanodioic acid and 94g(0.5mol) nonane diacid, 61.2g(0.6mol) isohexyl alcohol, 78g(0.6mol) isocaprylic acid and 129.6g(1.2mol) benzyl alcohol, the 45g concentrated sulfuric acid catalyst.Temperature of reaction progressively rises to 200 ℃ from 110 ℃, carries out the esterification of 8～10h.Reaction mixture is cooled to below 80 ℃, with the alkali aqueous solution washing, is washed to neutrality more earlier.At last, the decompression topping obtains A constituent of the present invention.
Embodiment 2
According to the method for embodiment 1, carry out same reaction, obtain B of the present invention and C constituent.B with 20% and 80% C carry out mechanically mixing, obtain D constituent of the present invention.Carry out mechanically mixing by 50% bis adipate, 20% nonane diacid dibasic acid esters and 30% sebacic acid dibasic acid esters, provide E constituent of the present invention.
Table 1 is listed the A of the present invention～raw material acid of E constituent and the proportioning of raw alcohol.
Comparative example
Prepared F and G Binary Carboxylic diester constituent (referring to table 1) as a comparison by technique known.
Embodiment 3
Viscosity, pour point, Diaspora Performance and the surface tension of A of the present invention～E constituent and F～G constituent have relatively been measured.Measurement result is listed in the table 2.
As can be seen from Table 2, bisgallic acid constituent of the present invention has good low-temperature performance and non-Diaspora Performance.And dibasic acid esters constituent as a comparison is not a poor performance at low temperatures, is exactly that Diaspora Performance is not poor.
Table 1
Constituent the present invention product are product relatively
Raw material mol counts * A B C D E F G
Adipic acid 0.5 0.5 0.5
Nonane diacid 0.5 1.5 1.5 1.5 0.2 0.5
Sebacic acid 0.3
Dissident's alcohol 0.5 1.5 1.3 1.34 0.2
Isooctyl alcohol 0.5 0.8 1.0
Benzyl alcohol 1.0 0.9 1.7 1.54 1.0 1.0
Phenoxyethyl alcohol 0.6 0.12
* the mol number average is listed by equivalent in the table
Table 2
Constituent the present invention product are product relatively
Performance A B C D E F G
Kinematic viscosity,
mm
2/s，100℃ 2.73 2.94 2.79 2.77 2.66 3.26 2.41
40℃ 8.64 10.64 9.27 9.15 8.96 11.87 9.74
Solidify 860 for-40 ℃ 1,275 2,492 1,197 1,296 1557
Pour point, ℃ ← 60 ← 60 ← 60 ← 60 ← 60 ← 60
Not Diaspora Performance test, *
Wandering rate %＜1＜1＜1＜1＜1＜1＞40
Surface tension,
10
-3N/cm 27.4 27.5 27.7 31.0 27.3 38.9 24.7
* formation testing is dropped on No. 45 steel discs, the wandering rate of formation testing is calculated as follows:
Wandering rate=(d
7-d
o)/(d
o) * 100%
d
0Be initial droplet diameter, mm d
7Be the droplet diameter behind the placement 7d under the normal temperature, mm
Claims (3)
1, a kind of low temperature, not wandering binary carboxylic asid double ester constutuent for instrument oil; It is characterized in that this constituent is by (a) C
4～C
12At least a kind of acid selecting among the fat dicarboxylic acid and (b) two classes alcohol deutero-diester mixture, (b) two class alcohol comprise the alcohol mixture of (1) benzyl alcohol or benzyl alcohol and 2-phenoxyethyl alcohol, (2) C
3～C
13Prop up at least a kind of alcohol selecting in the chain fatty monohydroxy-alcohol.
2, constituent as claimed in claim 1 is characterized in that (1) alcohol and the mol ratio of (2) alcohol can be 9: 1～1: 9.
3, as claim 1 and 2 described any one constituent, it is characterized in that (a) can be at least a kind of acid selecting in hexanodioic acid, nonane diacid and the sebacic acid, (b) two class alcohol can comprise the alcohol mixture of (1) benzyl alcohol or benzyl alcohol and 2-phenoxyethyl alcohol, at least a kind of alcohol selecting in (2) primary isoamyl alcohol, isohexyl alcohol and the isooctyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108667 CN1015376B (en) | 1988-12-20 | 1988-12-20 | Binary carboxylic asid double ester constutuent for instrument oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108667 CN1015376B (en) | 1988-12-20 | 1988-12-20 | Binary carboxylic asid double ester constutuent for instrument oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043523A CN1043523A (en) | 1990-07-04 |
| CN1015376B true CN1015376B (en) | 1992-02-05 |
Family
ID=4835154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88108667 Expired CN1015376B (en) | 1988-12-20 | 1988-12-20 | Binary carboxylic asid double ester constutuent for instrument oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015376B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4028982B2 (en) * | 2001-12-27 | 2008-01-09 | 新日鐵化学株式会社 | Fluid bearing unit and lubricating oil composition for bearing |
| CN108165351B (en) * | 2017-12-22 | 2020-11-17 | 武汉博达特种润滑技术有限公司 | High-low temperature instrument oil composition and preparation method thereof |
| CN113801018A (en) * | 2021-10-29 | 2021-12-17 | 中国石油化工股份有限公司 | Dibasic acid isomeric alcohol ester and preparation method thereof |
-
1988
- 1988-12-20 CN CN 88108667 patent/CN1015376B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1043523A (en) | 1990-07-04 |
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