DE1265901B - Cutting oil - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

ClOm

German KL: 23 c -1/04

Number: 1265 901

File number: '.

Filing date: January 11, 1963

Open date: April 11, 1968

Mineral oils, such as petroleum distillates, e.g. B. spindle oils, and / or kerosene used, to which certain extreme pressure additives are added, if they are severe Milling work, work on gears, thread cutters, etc. are to be used. It can too highly refined, low-aromatic spindle oils and synthetic oils, ζ. B. polyalkylene glycols and their esters, as Base oils or components of base oils are used. In general, the cutting oils contain active chlorine and / or active sulfur. Most known cutting oils have low viscosities, however, the use of materials of higher viscosity than cutting oils is also known. It is even known to use semi-solids, such as pork fat, as cutting oil. It is also known to sulfochlorinate such oils, since the oils obtained have extremely high pressure properties when the cutting oils are used exhibit.

It has now been found that sulfochlorinated cutting oils sometimes cause pitting or staining on the cutting tool or on the workpiece or on both. It has now been found that this disadvantage is avoided if a cutting oil based on mineral and synthetic oil containing chlorine and / or sulfur is added to a polyoxyaluminum acylate of the formula (OAlX) _n , in which X is an aliphatic monocarboxylic acid radical having 8 to 20 carbon atoms and η is an integer. The amount of the additive is 0.05 to 5 percent by weight, preferably 0.1 to 1.0 percent by weight.

The polyoxyaluminum cylates are well known compounds. Their manufacture is in the UK Patents 806 113 and 825 878 are described. You can, for example, by heating aluminum alcoholates, ζ. B. Aluminum tri (isopropoxide), with water and monocarboxylic acids in one or more Stages and preferably in an inert, non-volatile diluent, ζ. Β. in a light Lubricating oil. The production can, for example, by heating an aluminum alcoholate, preferably made of aluminum tri (isopropoxide). The alcoholate forms with a monocarboxylic acid an acyloxyaluminum alcoholate, and the latter is further heated to give the named compound. Some products of these reactions contain an ester formed during the reaction in one Amount that can be up to 50 percent by weight. The ester-containing products obtained in this way can be used according to the invention cutting oils can be added as an additive.

The cutting oils generally contain active cutting oil

Applicant:

The British Petroleum Company Limited,

London

Representative:

Dr.-Ing. A. ν. Kreisler,

Dr.-Ing. K. Schönwald, Dr.-Ing. Th. Meyer

and Dr. J. F. Fues, patent attorneys,

5000 Cologne 1, Deichmannhaus

Named as inventor:
Michael George Billett,
James Gibson,

Sunbury-on-Thames, Middlesex
(Great Britain)

Claimed priority:

Great Britain January 17, 1962 (1710)

Chlorine and / or active sulfur. You have to choose between the total chlorine content and the content of active chlorine as well as between the total sulfur content and the active sulfur content in the cutting oil differentiate. A cutting oil can contain chlorine, but some or all of the chlorine Chlorine can be chemically bound in such a way that it does not affect the properties of the cutting oil. A cutting oil can also contain sulfur, which is not active. Usually in a source material Sulfur present from petroleum is usually not active.

The activity of chlorine and sulfur in cutting oils is usually given in percent by weight and describes the proportion of cutting oil that reacts with copper powder under certain conditions. For this purpose, the cutting oil is ^{heated to 100 or 200 °} C. with an excess of copper powder, the solids are separated from the liquid, and the chlorine content and the sulfur content in the solid are then determined. The results are expressed in percent by weight based on the amount of cutting oil used.

Some cutting oils contain an additive that has active chlorine and active sulfur in the same molecule contains, e.g. B. a chlorinated and sulfurized

809 558 / Ψ79

Fatty substance. Others contain a chlorinated additive, e.g. B. a chlorinated wax, and / or a sulfurized additive, e.g. B. Sulphurized sperm acetate oil. Additives containing active chlorine and active sulfur in the same molecule are inherently less stable than other additives containing active chlorine in one molecule and active sulfur in another, but the former are more effective at high pressure. The viscosity according to the invention of 7.2 cSt at 60 ⁰ C, a flash point of 177 ° C and a sulfur content (inactive sulfur) of 2.6 percent by weight.

The mixture described above did not cause any pitting or staining on a cast iron plate after a contact time of 24 hours at room temperature. The same mixture, but without the addition of M 2, causes slight pitting after just a few hours and severe pitting Cutting oils can contain chlorine and / or sulfur in every io after 24 hours. A surprising effect is contained in the type described above, provided that it is also evident. 200 ⁰ C at least 0.1 percent by weight of active
Chlorine and / or at least 0.1 percent by weight
active sulfur is released. The following mixture is an example of a sulf o-

Polyoxyaluminum acylates can be made from most chlorinated cutting oils that contain only active chlorine: monocarboxylic acids and their mixtures
will. For the purposes of the invention, the monocarboxylic acids are 8 to 20 carbon atoms in the molecule
suitable. The natural acids such as behenic acid, lauric acid, myristic acid and zo are particularly suitable
especially stearic and oleic acids.

Example 2

Manufacturing example

A particularly suitable polyoxyaluminum acylate, hereinafter referred to as "M 2", is prepared as follows:

One molar proportion of aluminum tri (isopropoxide) and two molar proportions of oleic acid are reduced Heated under pressure until two molar proportions of isopropyl alcohol have distilled off from the solution. the Weight percent

Chlorinated hydrocarbons 61.5

M 2 0.5

Luminous kerosene 38.0

The analysis of this mixture resulted in the following values:

Viscosity at 6O ⁰ C (cSt) 2.0

Total chlorine content (percent by weight) 36

active at 100 ⁰ C 0.4

active at 200 ⁰ C 26

Sulfur content (percent by weight)

total 0.04

active at 100 ° C 0

active at 200 ° C 0

The temperature is then increased, a molar proportion each of isopropyl oleate and polyoxyaluminum oleate being formed. The chlorinated hydrocarbon was chlorinated. M 2 is a light brown liquid of a vis- tes hydrocarbon wax with 60 weight percent of viscosity of from about 0.5 poise at 2O ⁰ C. The hydrolysis using total chlorine. The used light resistance is about 80%. M 2 contains about 35 leum and had the following key figures: 50 percent by weight isopropyl oleate and 50 percent by weight

percent polyoxyaluminum oleate. Its aluminum content is 4.2 percent by weight.

example 1

The mixture below is an example of a sulfochlorinated cutting oil that contains both active chlorine as well as active sulfur contains:

Weight percent

Sulphochlorinated fat 8

M2 1

Lubricating oil 91

An analysis of the mixture resulted in the following values:

Viscosity at 60 ^° C. (cSt) 9.2

Total chlorine content (percent by weight) 0.64

active at 100 ⁰ C 0.1

active at 200 ⁰ C 0.5

Total sulfur content (percent by weight) 3.2

active at 100 ° C 0.1

active at 200 ⁰ C 0.6

40

The sulfochlorinated fat used contained 8 parts by weight of total chlorine and 8 parts by weight of total sulfur in the same molecule. The lubricating oil used was made from petroleum and had a

Initial boiling point ( ⁰ C) 180

End of boiling ( ⁰ C) 254

Flash point ( ⁰ C) 134

Specific weight at 15.6 / 15.6 ° C ... 0.787 aromatic content (percent by weight) .... 8.5 sulfur content, not active
(Weight percent) 0.069

The mixture described above does not cause any pitting of a cast iron plate after a contact time of 24 hours at ambient temperature. The same mixture, but without M 2, causes slight pitting after just a few hours and moderate erosion after 24 hours.

Claims (1)

Claim: Use of a polyoxyaluminum acylate of the formula (O Al X) _n , in which X is an aliphatic monocarboxylic acid radical with 8 to 20 carbon atoms and η is an integer, as an additive for cutting oils based on mineral and synthetic oils containing chlorine and / or sulfur . 55 60 References considered: British Patent Nos. 806 113, 825 878; U.S. Patent No. 2,695,877. 809 538/479 4.58 © Bundesdruckerei Berlin