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Publication numberUS2899390 A
Publication typeGrant
Publication dateAug 11, 1959
Filing dateMar 29, 1956
Publication numberUS 2899390 A, US 2899390A, US-A-2899390, US2899390 A, US2899390A
InventorsJohn J. Plemich
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Non-staining aluminum rolling
US 2899390 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

NON-STAINDJG ALUMINUM ROLLHJG LUBRICANT John J. Plemich, Whiting, Ind., assignor to Standard Oil Company, Chicago, 111., a corporation of Indiana No Drawing. Application March 29, 1956 Serial No. 574,589

'1 Claim. (Cl. 252- 56) This invention relates to the avoidance of staining of aluminum sheet by lubricant employed in the rolling operation which is usually effected at a temperature of about 600 to 650 F.

Many types of compounds have been employed as lubricants in the rolling of aluminum sheets but most of them either provide inadequate lubrication or result in an objectionable stain or imperfection on the surface of the resulting sheet. One of the best aluminum rolling lubricants heretofore known was a low boiling petroleum distillate containing a high molecular weight polybutene (U.S. 2,256,603). The object of this invention is to provide an improvement in this type of lubricant, i.e. to provide an effective aluminum rolling lubricant of improved nonstaining characteristics.

I have discovered that an undiluted polybutene which has a viscosity in the range of about 40 to 80 seconds Saybolt at 100 R, which contains no components boiling as high as 650 F. and which has an average molecular weight below 300 and preferably in the range of about 200 to 270, when it is subjected to the standard aluminum stain test is remarkably superior to polymers of higher viscosity and molecular weight and to blends of such polymers in conventional low boiling mineral oil, such as mineral seal oil. The oil film that remains on an aluminum sheet after it has been rolled with this improved lubricant does not cause staining of the aluminum even in a subsequent annealing step.

The procedure for testing the stain properties of aluminum rolling lubricants is substantially as follows: about .8 mil. of the lubricant to be tested is carefully spread over the entire surface of a clean aluminum test plate which is then placed in an electric mufile furnace where it is held at a temperature of about 650 F. for a period of about 30 minutes, the test plate being horizontally placed so that the lubricant will not run oif. At the end of the test period the plate is removed and compared with standard plates which are rated from A to H, the A plate being bright and free from stain and the H plate being most stained.

Test data obtained on a series of lubricants is shown in the following table:

Patented Aug. 11, 1959 The test data show that high viscosity and high molecular weight polybutenes per se (tests a and b) are unsatisfactory as aluminum rolling lubricants; although such polymers have the known properties of decomposing without substantial carbon formation at high temperatures, they nevertheless cause undesirable staining of aluminum at 650 F. Mineral seal oil, which might be expected to vaporize completely at 650 F., nevertheless causes appreciable staining either when employed alone (test g) or with a viscous and high molecular weight polymer (test h). The low molecular weight polybutene of lubricating oil viscosity (tests d, e and f) in the absence of mineral oil diluent proved to be outstandingly superior to any of the other lubricants tested. For best nonstaining properties it appears that the polybutene should have a viscosity below 100 seconds Saybolt at 100 F. (run 0 showed a stain test of B). Ordinary commercial polybutene of 100 seconds Saybolt viscosity at 100 F. has an average molecular weight of about 330 and contains substantial amounts of components boiling upwards of 650 F.; apparently it is these high molecular weight, high boiling components which are responsible for stain and it is therefore important that the polybutene used as an aluminum rolling lubricant be free from components boiling above 650 F., i.e. it should boil in the range of about 460 to 645 F.

Similar tests made at 600 F. showed the 40 and 50 vis. materials (1 and e) to have stain ratings of A, the vis. polymer (d) to have a stain rating of about B and the vis. polymer (c) to have a stain rating of D. Here again the materials of about 40 to 80 seconds Saybolt viscosity at about 100 F. were found to be outstandingly superior to heavier polymers.

As a specific example, an aluminum rolling lubricant has been successfully tested which has a viscosity of 80 seconds Saybolt at 100 F., a boiling range of 560 to! 645 F., a flash point of 310 F., and an API gravity of 38.8, this particular lubricant having an average molecular weight below 270 and being substantially free from components boiling above 650 F. In the actual rolling of aluminum an effective amount of a non-staining lubricity agent, e.g. about 1 percent of butyl stearate is added to the polybutene.

The polybutenes herein referred to are those prepared by polymerizing butenes from a butane-butylene stream as described, for example, in US. 2,407,873, and 2,677,000-1-2.

I claim:

A non-staining aluminum rolling lubricant which consists essentially of an undiluted polybutene, prepared by polymerizing butenes from a butane-butylene stream, which polybutene has a Saybolt viscosity at 100 F. in the range of about 40 to 80 seconds, which boils in the range of about 460 to 645 R, which has an average molecular weight in the range of about 200 to 270, and which polybutene contains about 1 percent of butyl stearate.

References Cited in the file of this patent UNITED STATES PATENTS 2,256,603 Wright Sept. 23, 1941 2,403,238 Rosenstiehl July 2, 1946 2,407,873 Evering et a1 Sept. 17, 1946 2,590,451 Perry Mar. 25, 1952 2,605,224 Jahn July 29, ,1952 2,652,362 Woods et a1. Sept. 15, 1953 2,729,992 Wankat Jan. 10, 1956

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2256603 *Dec 21, 1939Sep 23, 1941Standard Oil Development CompanyProcessing with nonstainingcom
US2403238 *Feb 2, 1944Jul 2, 1946Texas CoMethod of lubrication as applied to the processing of aluminum and aluminum alloys
US2407873 *Nov 13, 1943Sep 17, 1946Standard Oil CoPolymerization of olefins
US2590451 *Aug 9, 1947Mar 25, 1952Shell DevMetalworking lubricant
US2605224 *Jun 24, 1949Jul 29, 1952Shell DevMetalworking lubricant
US2652362 *Aug 15, 1950Sep 15, 1953Shell DevGrease composition
US2729992 *Jul 19, 1952Jan 10, 1956Universal Oil Prod CoRolling of metals
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3062745 *Dec 2, 1958Nov 6, 1962Standard Oil CoGlass grinding process employing a non-foaming oiliness agent
US3298951 *Jan 24, 1966Jan 17, 1967Roman D GuminskiStabilized polybutene composition
US3298954 *Mar 1, 1965Jan 17, 1967Standard Oil CoMetal working lubricant
US4062784 *Aug 2, 1976Dec 13, 1977Swiss Aluminium Ltd.Oil-in-water emulsion for cold rolling
US4151102 *May 26, 1978Apr 24, 1979Swiss Aluminium Ltd.Synthetic bearing lubricant
US4488979 *Feb 7, 1983Dec 18, 1984Swiss Aluminium Ltd.Hydraulic fluid
US4761241 *Aug 8, 1986Aug 2, 1988Nihon Kousakuyu Co., Ltd.Oily lubricant for cold plastic processing of metallic material
US5783530 *Mar 1, 1994Jul 21, 1998Alcan International LimitedNon-staining solid lubricants
US6461730 *Aug 29, 1996Oct 8, 2002Danfoss A/SLubricant for wire used for forming the stator windings of an electrical refrigerating compressor
US6562767 *Feb 12, 1996May 13, 2003Danfoss Compressors GmbhProcess for producing a lubricant coated laquered wire used for forming the stator winding of an electrical refrigerating compressor
DE1594330B1 *Apr 23, 1965Oct 15, 1970Alcan Res & DevWaessrige Schmiermitteldispersion fuer das Heisswalzen von Aluminium
EP0087386A1 *Feb 1, 1983Aug 31, 1983Schweizerische Aluminium AgHydraulic fluid