WO2017114827A1

WO2017114827A1 - Water-based lubricant for metalworking

Info

Publication number: WO2017114827A1
Application number: PCT/EP2016/082703
Authority: WO
Inventors: Véronique VERROUL; Richard Frelechoux; David KUPIEC
Original assignee: Total Marketing Services
Priority date: 2015-12-28
Filing date: 2016-12-27
Publication date: 2017-07-06
Also published as: FR3046178A1

Abstract

The present application relates to a lubricating composition including: at least 70 wt.% water; at least one corrosion inhibitor; and between 2 and 15 wt.% of at least one alkoxylated fatty alcohol obtained by adding at least four oxide ethylene (OE) moles and optionally at least one mole of propylene oxide (PO) to one fatty alcohol including between 8 and 15 carbon atoms. This composition is particularly useful as a metalworking lubricant.

Description

Water-based lubricant for metalworking

The present application relates to the field of lubricating compositions, especially lubricating compositions for working metal. In particular, the present application relates to aqueous-based lubricating compositions, in particular for working metals, and in particular for metal deformation operations.

For metal working, and especially for deformation operations, in particular on aluminum, there are products based on formulas comprising a solvent and a fatty substance. The solvent generally serves as a vector for depositing the fatty substance useful for lubrication on the surface of the metal, the solvent evaporating during the operation. The solvent also makes it possible to provide good wettability of the surface of the metal giving it the properties necessary for its deformation.

However, these products including solvents can be toxic and therefore pose a potential health risk. The presence of these solvents may also lead to the marketing of labeled products and the need for people using these products to wear protective equipment, including personal protective equipment, when handling the product.

In addition, these solvent-based products can be difficult to clean and therefore require the use of specific and complex cleaning products to handle. There is therefore an interest in providing a lubricating composition, in particular for working metals, to meet the disadvantages of the prior art and in particular limiting the use of solvent, including toxic or potentially toxic solvent.

An object of the present invention is to provide a lubricating composition, especially a lubricating composition for working metals, limiting the use of solvent, in particular of toxic or potentially toxic solvent.

Another object of the invention is to provide such a composition which allows good lubrication, especially of the surface of the metal to be treated.

Another object of the present invention is also to provide such a composition which also makes it possible to obtain a good wettability of the surface to be treated and therefore a homogeneous spread of the active ingredient responsible for the lubrication.

Another objective of the present invention is also to provide such a composition which also makes it possible to facilitate the cleaning of the post-treatment surface, in particular by simple passage with water. An object of the invention is therefore to provide a lubricant composition that provides a good compromise between reduced toxic risk, good lubrication and good wettability. A further object is also to provide such a composition which has sufficient anti-corrosion and anti-wear properties.

Other objectives will appear on reading the description of the invention which follows.

In order to meet the above objectives and the drawbacks cited in the state of the art, the present invention proposes a lubricant composition comprising:

at least 70% by weight of water;

at least one anti-corrosion agent; and

between 2 and 15% by weight of at least one alkoxylated fatty alcohol obtained by addition of at least 4 moles of ethylene oxide (EO) and optionally at least one mole of propylene oxide (PO) , on a fatty alcohol comprising from 8 to 15 carbon atoms. Particularly advantageously, the lubricant composition of the present invention is a lubricating composition for working metals, especially for the transformation of metals. The lubricant composition according to the invention is particularly suitable for working with metals chosen from aluminum, steel, galvanized steel, yellow metals (for example copper, brass, preferably copper), etc. Preferably, the lubricating composition according to the present invention is advantageously suitable for working aluminum.

Preferably, the composition according to the invention comprises at least 75% by weight of water, preferably at least 80% by weight of water, preferably at least 85%, for example the composition according to the invention comprises 70% by weight of water. at 98% by weight of water, especially 70 to 95% or 75 to 98% or 75 to 95% or 80 to 98% or 80 to 95% or 85 to 98%, or 85 to 85% by weight. 95%. This makes it possible to obtain a composition that has little toxicological impact, particularly for people using this product. Particularly advantageously, the inventors have shown that despite this large proportion of water, the surface to be treated was properly lubricated and the composition ensured good wettability of the surface.

In addition, the presence of a large proportion of water makes it easier to clean the surface to be treated, especially by simply passing or rinsing with water.

In addition, the composition according to the invention retains good anti-corrosion and anti-wear properties. Preferably, the composition according to the present invention comprises from 4 to 10% by weight of at least one alkoxylated fatty alcohol, or preferably from 5 to 15% by weight of at least one alkoxylated fatty alcohol, or preferably from 5 to 15% by weight of at least one alkoxylated fatty alcohol, or preferably from 5 to 15% by weight of at least one alkoxylated fatty alcohol. 10% by weight of at least one alkoxylated fatty alcohol.

The alkoxylated fatty alcohol in the composition according to the invention acts as a lubricant. Preferably, the alkoxylated fatty alcohol of the invention is obtained from a fatty alcohol comprising from 9 to 15 carbon atoms. Preferably, in the alkoxylated fatty alcohols of the invention, and to guarantee a solubility of the compound in water, the number of moles of ethylene oxide is between 4 and 15, preferably between 4 and 10. Preferably, in order to guarantee a good solubility of the alkoxylated fatty alcohol according to the invention in water, the number of moles of proylene oxide is at most equal to the number of moles of ethylene oxide, preferably number of moles of propylene oxide is between 0 and 5.

In the context of the present invention, the term alkoxylated fatty alcohol obtained by adding at least 4 moles of ethylene oxide (EO) and optionally at least one mole of propylene oxide (PO) on a fatty alcohol comprising from 8 to 15 carbon atoms a compound of formula (I):

R- (OA) _z OH (I)

in which :

R represents a saturated or unsaturated, linear or branched alkyl group comprising from 8 to 15 carbon atoms;

A, all identical or different, represents a CH ₂ CH ₂ group or a CH ₂ CH (CH ₃ ) group;

z represents an integer greater than or equal to 2, preferably an integer greater than or equal to 4;

the compound of formula (I) comprising at least two ethylene oxide units ((OCH ₂ CH ₂ ), OE).

Preferably, in the compounds of formula (I), R represents a saturated or unsaturated, linear or branched alkyl group comprising from 9 to 15 carbon atoms. Preferably, the compounds of formula (I) comprise from 2 to 15 ethylene oxide units, preferably from 2 to 10 ethylene oxide units, advantageously from 4 to 15 ethylene oxide units, preferably from 4 to 10 ethylene oxide units. Preferably, in the compounds of formula (I), the number of propylene oxide units is at most equal to the number of ethylene oxide units, preferably the compounds of formula (I) comprise from 0 to 5 units of propylene oxide. Preferably, the compounds of formula (I) comprise from 2 to 15 ethylene oxide units, preferably from 2 to 10 ethylene oxide units, advantageously from 4 to 15 ethylene oxide units, preferably from 4 to 10 ethylene oxide units and the number of propylene oxide units is at most equal to the number of ethylene oxide units, preferably the compounds of formula (I) comprise from 0 to 5 units of propylene oxide.

Preferably, the alkoxylated fatty alcohol according to the invention is a compound chosen from the formulas (II) or (III):

R- (OCH ₂ CH ₂ ) _x (OCH ₂ CH (CH ₃ )) _y OH (II); R - (OCH ₂ CH (CH ₃ )) _y (OCH ₂ CH ₂ ) _x OH (III) in which:

x represents an integer greater than or equal to 2, preferably greater than or equal to 4, y represents an integer greater than or equal to 0.

Preferably in the compounds (II) or (III) according to the invention, R represents a saturated or unsaturated, linear or branched alkyl group comprising from 9 to 15 carbon atoms. Preferably, in the compounds of formula (II) or (III) according to the invention, x is an integer between 2 and 15, preferably between 2 and 10, advantageously from 4 to 15, preferably from 4 to 10. Preferably, in the compounds of formula (II) or (III), y is an integer between 0 and x, preferably between 0 and 5. Preferably, in the compounds of formula (II) and (III), x is an integer between 2 and 15, preferably between 2 and 10, advantageously from 4 to 15, preferably from 4 to 10, and y is an integer between 0 and x, preferably between 0 and 5.

The composition according to the invention comprises at least one anti-corrosion agent. The anti-corrosion agents that can be used in the compositions of the invention can be determined by those skilled in the art depending on the metal to be treated. For example, the anti-corrosion agents of the invention can be chosen from the anti-corrosion agents of aluminum, steel, galvanized steel, yellow metals (for example copper, brass, preferably copper ), etc., alone or in mixture. These anti-corrosion agents are known to those skilled in the art. The anti-corrosion agents for aluminum are, for example, a mixture of maleic acid derivative and benzotriazole, an anti-corrosion agent for galvanized steel is, for example, benzylpyridinium (for example marketed by BASF under the name Lugalvan BPC48), examples of anti-corrosion agents for steel are organic polycarboxylic acids neutralized by TEA, examples of anti-corrosion agents for yellow metals are triazole and for example tolyltriazole.

Preferably, the composition comprises from 0.03 to 2.5% by weight of anti-corrosion agent, preferably from 0.03 to 2% by weight, preferably from 0.03 to 1.5% by weight, preferably from 0.03 to 1%, for example from 0.03 to 0.6%.

The lubricating composition according to the present invention preferably does not comprise an oil which is not soluble in water. By non-water-soluble oil is meant in particular the lubricating base oils belonging to groups I to V according to the classes defined in the API classification (or their equivalents according to the ATIEL classification) or their mixtures. The lubricating composition of the invention may comprise at least one ester which is soluble in water, for example comprising ethoxylated and optionally propoxylated groups, for example ethylene oxide or at least one water-soluble polyalkylene glycol (PAG), for example based on monomer ethylene oxide or propylene oxide monomer, alone or in mixture.

The composition according to the invention may furthermore comprise at least one additive chosen from the additives conventionally used by the person skilled in the art in lubricating compositions for working metals, preferably at least one additive chosen from antifoams, biocides, wetting agents, friction modifiers, anti-freeze additives, preferably anti-foams and biocides, alone or in admixture.

The composition according to the invention can be obtained by simple mixing of the various constituents, preferably the biocides and antifoam are added at the end of the preparation of the composition.

The present invention also relates to the use of the composition according to the invention as a lubricating composition for working metals, for example aluminum.

The present invention also relates to a method of lubricating the metal surfaces for working these surfaces, in particular aluminum, comprising depositing on the metal surface, in particular aluminum, the lubricating composition according to the invention.

The present invention also relates to a method of deforming a metal surface, in particular aluminum, comprising at least one step of contacting the the metal surface, in particular aluminum, with the lubricating composition according to the invention.

The present invention also relates to the use of an alkoxylated fatty alcohol obtained by the addition of at least 4 moles of ethylene oxide (EO) and optionally at least one mole of propylene oxide (PO) on a fatty alcohol comprising 8 to 15 carbon atoms in a lubricating composition comprising at least 70% by weight of water and at least one anti-corrosion agent for improving the lubricating properties of a metal surface, in particular aluminum, of the composition lubricating.

The set of characteristics and preferences relating to the alkoxylated fatty alcohol defined above also applies to the above use.

The present invention will now be illustrated by non-limiting examples.

Example 1: Lubricating compositions according to the invention

Lubricating compositions according to the invention are prepared according to Table 1 below (the compositions are given by weight (g)). These compositions were obtained by simple mixing of the various components, the biocide being introduced last.

In the compositions below:

Emulsogen LCN 088 (sold by the company Clariant): ethoxylated C 9 -C 1 branched oxoalcohol comprising 8 moles of ethylene oxide (EO) HLB 13

Emulsogen LCN 18 (sold by the company Clariant): Oxoalcohol branched C9-1 1 ethoxylated comprising 10 moles EO

Genapol 0100 (marketed by Clariant): polyglycol fatty alcohol ether C16 / 18 comprising 10 moles EO,

Genapol X 080 (marketed by Clariant): Isotridecyl alcohol polyglycol ether with 8 moles EO

Genapol EP 0244 (marketed by Clariant): Fatty alcohol C10 / C12-EO (4 moles) -OP (4 moles) (OP = propylene oxide)

Genapol EP 2564 (marketed by Clariant): Oxo-alcohol C12 / 15-oxo alcohol OE (6 moles) -OP (4 moles) Irgacor L184 (marketed by BASF): TEA neutralized organic polycarboxylic acid, anti-corrosion steel

Tolyltriazole Na 50%: pH 12. anti-corrosion yellow metals

Mergal 758 (marketed by Troy Corporation): Biocide (bactericide, fungicide) pH: 4-6

Table 1

Example 2: Determination of contact angles The method of determining the contact angle used is described below:

In this method, a drop of the lubricating composition of interest is deposited on a specific material consisting of an aluminum surface. The angle formed by the drop on the material is calculated by the Laplace Young model, following the extraction of the optical profile of the drop using a camera associated with a software (SCA 20 from Dataphysics)

The contact angles (in degrees) were measured at 20 ° C.

The results obtained are shown in Table 2 below.

comparative

Composition 1 2 3 4 5 6

1

Angle of

<15 46 <15 20 17 <15 <15

contact (°) Table 2

The contact angle is considered good, that is to say that the lubricating composition has good wettability of the surface when it is less than 30 °. The results therefore show that the lubricant compositions of the invention provide good wettability of the surface, especially with respect to the use of fatty alcohol comprising 16 or more carbon atoms.

Example 3: CNOMO corrosion tests on aluminum, steel and galvanized steel

The corrosion evaluation methods used correspond to the methods according to the IP 287 standard or the C.N.O.M.O. D 63 5223

Aluminum, steel and galvanized steel plates were coated with compositions 1 and 2 of Example 1 and the corrosion of these plates was studied.

The results obtained are shown in Table 3 below and include the quotation of the test piece and the quotation of the composition after the test.

Quotation of the test specimen:

0 polished plate appearance

1 slight tarnishing

2 important tarnishing

3 corrosion and / or pitting.

Composition after test:

0 unchanged aspect

1 slight color

2 pronounced color

3 staining and / or deposition.

Table 3

The results show that the lubricant compositions according to the invention retain good anticorrosion properties, irrespective of the treated metal surface. The The results also show that the appearance of the lubricating compositions according to the invention does not vary or soon after treatment and therefore that the lubricant compositions according to the invention are stable over time.

Example 4: Determination of the impression diameter

The determination method used corresponds to the method according to D55 / 1078 with the following characteristics:

- load: 40 kg,

- speed: 1500 rpm,

- ambient temperature,

- duration: 1 h.

The compositions 1 and 2 as well as the comparative composition 1 of example 1 were thus evaluated on the basis of this method.

The results are summarized in Table 4 below.

The composition is considered to have good anti-wear properties if the imprint diameter is less than 1.35.

Table 4

The results show that the lubricant compositions according to the invention retain good anti-wear properties.

Claims

1. Lubricating composition comprising:

at least 70% by weight of water;

at least one anti-corrosion agent; and

between 2 and 15% by weight of at least one alkoxylated fatty alcohol obtained by addition of at least 4 moles of ethylene oxide (EO) and optionally at least one mole of propylene oxide (PO) on a fatty alcohol comprising 8 to 15 carbon atoms.

2. - Composition according to claim 1 comprising from 4 to 10% by weight of at least one alkoxylated fatty alcohol.

3. - Composition according to claim 1 or 2, wherein the alkoxylated fatty alcohol is obtained from an alcohol comprising from 9 to 15 carbon atoms.

4. - Composition according to any one of claims 1 to 3, wherein the alkoxylated fatty alcohol comprises from 2 to 15 moles of ethylene oxide, preferably from 2 and 10, preferably from 4 to 15, preferably from 4 to 10.

5. - Composition according to any one of claims 1 to 4, wherein the number of moles of propylene oxide in the alkoxylated fatty alcohol is at most equal to the number of moles of ethylene oxide, preferably is between 0 and 5.

6. A composition according to any one of claims 1 to 5, characterized in that it does not include oil insoluble in water.

7. - Composition according to any one of claims 1 to 6, further comprising at least one additive selected from antifoam, biocides, wetting agents, friction modifiers, anti-freeze additives, preferably anti-blocking agents. mosses and biocides, alone or in admixture.

8. - Use according to any one of claims 1 to 7 as a lubricating composition for working metal.

9. A method of deformation of a metal surface, in particular aluminum, comprising at least one step of contacting the metal surface, in particular aluminum, with the lubricant composition according to one of claims 1 to 7.