DD145470A3 - METHOD FOR THE PRODUCTION OF A LUBRICANT WITH PREFERABLE ANTIBODY CARE BEHAVIOR - Google Patents

Description

Process for the preparation of a lubricant with excellent anti-wear behavior

The invention relates to a method for producing a lubricant with excellent anti-wear behavior, which is particularly suitable for the lubrication of Eiseniaetallreibpaarungen in Mischerbungsgebiet.

It is known that the wear of machine parts depends on the materials and the lubricants used. To improve the friction and wear behavior, anti-wear additives are added to the lubricants, such as mineral oils or synthetic lubricants. As anti-splicing additives, mainly metal-dialkyldithiophosphates, in particular zinc dialkyldithiophosphate, and organophosphorus and organosulfur compounds are used. Lubricants alloyed with known anti-wear agents cause controlled chemical mechanical wear. As a result, there is an increase in the lubrication gap until the frictional unit is unusable, as a result of which great economic material and time losses arise.

For the preparation of the known anti-wear additives usually a large expenditure on equipment and technology is necessary.

Zvieck of the invention is to provide a method for producing a lubricant, which has an excellent anti-wear behavior in addition to good corrosion inhibiting and aging-inhibiting properties and is suitable for the lubrication of Eisenmetallreibpaarungen in Mischreibungsgebiet.

The invention has for its object to develop a method that allows the production of lubricants with very good anti-wear properties, with only wenig.technologischen and equipment expense.

It has been found that from polyols e.g. Diols and juliols of different chain length and OH position, as well as of technical polymerization products, e.g. the general formula

HOC _n H _2n . (OC _n H _{2 &} ) _a OC _n H _2n OH (η = 2-3; m = 1-30)

and copper powder or. Copper oxide at temperatures of 0 to 1 $ 0 ⁰ C, preferably at 20 to 90 ⁰ C, a lubricant is obtained., Which has an excellent anti-wear behavior. By introducing air or oxygen or intensive stirring, the reaction time of the lubricant with the copper powder or copper oxide can be shortened.

175 © 82 -3-

The solution according to the invention makes it possible to produce a simple ax lubricant, which by its versciileißniindernden properties the fit of. machine parts not adversely affected. are contributing to the lifespan increase of the machines.

The invention will be explained in more detail in two embodiments.

example 1

Sin polyethylene glycol with an average molecular weight of 400. ' is added in a container with 1% copper powder. This mixture remains standing as long as the desired amount of copper has reacted with the lubricant. The implementation takes place in about 14 days. Hicht implemented copper powder can be separated by filtration, Sentrifugafeion or sedimentation. The reaction time can be shortened by heating, stirring and / or introducing air or oxygen. The resulting reaction product is a lubricant with excellent anti-wear performance, as evidenced by the following test values η. For comparison, a conventional mineral oil viscosity 22.5 cSt at 50 ⁰ C which was alloyed with 1.5% Zinkdialkyldithiophosphat and an untreated polyethylene glycol having an average molecular weight of 400 was used.

- Test machine : .. Amsler test machine

(Disc and 6 mm steel pin)

proof test:

Test values:

step test

Initial pressure: 90 kp

'Pressure increase after every 25 min'um'90 kp read after every 25 min by 90 kp

Product according to embodiment i

Polyethylene glycol techn.,

'

mg 400 unalloyed

alloyed mineral oil

print

Temp. Friction coefficient abrasion ( ⁰ G) (cm kp) (mg)

Temp. friction abrasion Temp, friction abrasion ι ( ⁰ C) (cm kp) (Mg) (° G) (cm kp) (Mg) I 32 3.8 3.8 36.5 6.1 4.4 38.5 6.95 8.95 44 10.3 7.3 49.5 11.9 13.3 5 ^, 8 16.7 12.3 60 14.1 25.0 64.5 22.9 19.7

90 kp 28 , 7 3.0 1.7 180 kp • 30 , 5 38.3 3.0 270 kP 32 , 5 5.7 4.6 360 kp 34 3 7.1 5.8

175 ® S2 -β-

Example 2

Hexanetriol (1,2,6) is stirred with 1.2% copper (I) oxide for 3 hours at 60 ⁰ C and then separated by centrifugation of unreacted copper oxide.

The reaction can also be carried out at room temperature and without stirring, the reaction time is then extended. The resulting reaction product has an excellent anti-wear behavior and is due to its high viscosity of 320 cSt at 50 ⁰ G also suitable for use at higher temperatures.

Test results: Testing machine:

proof test:

Aimen Wieland testing machine

Load: 250 kp (about 350 kgf / cm)

Time 25o minutes

Friction pairing: steel-steel

Weight difference: determined gravimetrically after the 50-minute run

K Product according to execution example Hexanetriol unalloyed GL 125 23 32 38 Friction force (kp)

Weight difference +1.8 (mg)

0.2

- 0.1

Claims (3)

claims 1. A process for the preparation of a lubricant with excellent anti-wear behavior, characterized in that polyols are reacted at temperatures of 20 to 150 ⁰ C with copper powder or copper oxide and the nichtrr- .- set copper powder or copper oxide is separated, 2. A process for the preparation of a lubricant according to claim 1, characterized in that at temperatures of 40 to 90 ⁰ G, with stirring η and. Begasen with air or oxygen the reaction time is shortened. Process according to claim 1, characterized in that polyols, e.g. Diols or triols of different chain length and OH position or technical polymerization products, ie those of the general formula HOC H _0n . (OC H _{o jnn TT ηττ} α 2a ^x η 2n -m. OC rip OH in which η between three and m means an integer from 1 to 30.