Metalworking fluid compositions and preparation thereof

a technology of metalworking fluid and composition, applied in the field of metalworking composition, can solve the problems of affecting the effect of lubricant composition, affecting the effect of lubricating effect, so as to reduce the formation of mis

Inactive Publication Date: 2012-01-12
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]In one embodiment, there is provided a metalworking fluid comprising a lubricant base oil having consecutive numbers of carbon atoms and less than 10 wt % naphthenic carbon by n-d-M; and 0.10 to 10 wt. %. of at least an additive selected from the group of a metalworking fluid additive package; metal deactivators; corrosion inhibitors; antimicrobial; anticorrosion; extreme pressure agents; antifriction; antirust agents; polymeric substances; anti inflammatory agents; bactericides; antiseptics; antioxidants; chelating agents such as edetic acid salts, and the like; pH regulators; antiwear agents; and mixtures thereof, and wherein the metalworking fluid has an average mist accumulation rate of less than 300 mg/mm3 within 30 seconds after start in an aerosol mist formation test. In another embodiment, the metalworking fluid has an average mist accumulation rate of less than 150 mg/mm3 in

Problems solved by technology

In high-speed machining operations that require rapid fluid application and recirculation, foam and air entrainment are sometimes experienced with undesirable results.
Foaming is undesirable because it may reduce cooling at the workpiece-tool contact zone and causes containment transport and control problems.
The use of certain foam control agent(s) such as such as silicon-based foam inhibitors leaves residues on machined parts, making it rather difficult to subsequently paint the parts.
Additionally for some foam control agent(s), their use is generally found to worsen the metalworking fluid

Method used

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  • Metalworking fluid compositions and preparation thereof
  • Metalworking fluid compositions and preparation thereof
  • Metalworking fluid compositions and preparation thereof

Examples

Experimental program
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examples

[0086]Unless specified otherwise, the compositions are prepared by mixing the components in the amounts indicated in the Examples / Tables. The components used in the Examples are listed below.

[0087]EP agent is a commercially available sulfurized polymerized ester, 10% inactive sulphur extreme-pressure agent.

[0088]HYNAP™ N100HTS hydrotreated, naphthenic oil (Group V) is from San Joaquin Refining Oil, Inc. of Bakersfield, Calif.

[0089]Ashland™ 100SN Group 1 oil is from Ashland Inc.

[0090]Chevron™ 100R group 2 oil, Chevron™ 100R group 3 oil, and Chevron Synfluid 4 cSt PAO oil are all from Chevron Corporation of San Ramon, Calif.

[0091]Additive 2 is a sulfurized vegetable fatty acid ester. Defoamer is an acrylate oligomer antifoam / defoamer. Additive CAS is a commercially available overbased calcium sulphonate PEP metalworking additive containing carbonated alkylbenzene sulfonate. Additive SO is a sulfurized olefin.

[0092]Mineral seal oil (MSO) having a viscosity of 3.39 mm2 / sec at 40° C., an...

examples 1-6

[0095]A number of metalworking fluid compositions having components as listed in Table 1 were formulated and their properties were measured using various standard test methods: ASTM D1401-02 for Water Separability of Petroleum Oils and Synthetic Fluids; ASTM D 3427 (2003) Standard Test Method for Air Release Properties of Petroleum Oils; and ASTM D892-95 Foam Stability Sequence Test. As shown in the table, the example incorporating the isomerized base oil shows low foaming tendency (foam height of nil) and air release property that is comparable if not better than the prior art oil (in view of the test repeatability of 1 min.).

TABLE 1Example 1Example 2Example 3Example 4Example 5Example 6Group VGroup 1Group 2Group 3PAOGTLwt %wt %wt %wt %wt %wt %Sample IDSJR Hynap N100HTS - Group V95—————Ashland 100 SN - Group 1—95————Chevron 100 R - Group 2——95———Chevron UCBO 4R - Group 3———95——Chevron Synfluid, 4 cSt - PAO————95—GTL GST0449 isomerized base oil—————95EP agent555555Kinematic Viscosity...

examples 7-13

[0096]A number of metalworking fluid compositions having components as listed in Table 2 were formulated and their properties were measured / recorded. Examples 11-13 compare the compositions each with 0.25 wt. % of an anti-mist agent added (a high molecular weight oil soluble polymer tackifier).

[0097]The samples were subject to an aerosol (mist) formation experiment similar to the one described in “Polymer Additives as Mist Suppressants in Metal Cutting Fluids,” by Marano et al., Journal of the Society of Tribologists and Lubrication Engineers, October 1995, pp. 25-35. Basically in the test, metalworking fluid (in 100 mil. sample) was supplied to a coaxial atomizer's tip through a tube (e.g., ID of 0.0011 m) by a syringe pump at constant flow rates up to 0.0084 litre / min. Compressed air was supplied through the annulus between the outer and inner tubes (ID 0.0021 m and OD 0.0013 m, respectively) at flow rates up to 35 litres / min. Mist generated by the atomizer was directed to a long ...

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Abstract

A metalworking fluid composition comprising an isomerized base oil having consecutive numbers of carbon atoms and less than 10 wt % naphthenic carbon by n-d-M is provided. The metalworking fluid has reduced mist formation, low foaming tendency and excellent air release properties, and excellent wear properties.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of copending application Ser. Nos. 11 / 831,910, filed Jul. 31, 2007, Ser. No. 11 / 831,896, filed Jul. 31, 2007 and Ser. No. 13 / 045,816, filed Mar. 11, 2011 and claims priority therefrom.TECHNICAL FIELD[0002]The invention relates generally to metalworking compositions exhibiting improved anti-mist properties, having a low foaming tendency excellent air release properties, and excellent wear properties.BACKGROUND[0003]In industrial metal cutting operations or in the semiconductor industry for cutting silicon wafers, machining or metalworking fluids are employed. Metalworking fluids are used as cutting oils, rolling oils, drawing oils, pressing oils, forging oils, abrasive working oils for aluminium disks, abrasive oils for silicon wafers and coolants. In high-speed machining operations that require rapid fluid application and recirculation, foam and air entrainment are sometimes experienced with unde...

Claims

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Application Information

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IPC IPC(8): C10M135/06
CPCC10M111/04C10M169/04C10N2240/40C10N2230/30C10N2230/00C10M2219/046C10M2219/024C10M2219/022C10M2209/084C10M2203/1025C10M2203/1065C10M2205/0206C10M2205/173C10N2220/025C10N2220/021C10N2220/022C10N2210/02C10N2030/00C10N2030/30C10N2040/20C10N2020/065C10N2020/04C10N2020/02C10N2010/04
Inventor HEE, ALLAN GEORGEROSENBAUM, JOHN M.MUNOZ, ALEXANDER C.PASS, KATRINACASTRO, EMERSONSCHOLIER, THEIRRY R.DE KEYSER, MARIANNE
Owner CHEVROU USA INC
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