CS199097B1 - Rolling oil for cast belts - Google Patents

Description

SSSS DESCRIPTION OUT

REPUBLIC <19> TO THE COPYRIGHT CERTIFICATE 199 997 (Π) (Bl)

OFFICE OFFICE

AND DISCOVERIES (61) (23) Show Priority (22) Enrolled 21 11 77 (21) PV 7651-77 (32) (31) (33) 13 12 76 (WP C 10 m / 196 282) Democratic Republic of Germany (40 ) Published 17 09 79 (45) Published 39 09 82

The inventor of ROLLXG MANFRED, dipl.chem. , MERSEBURGSCHORCHT UWE dipl.chem..MAGDEBURGK0HLER J0ACHIM RNDr.dipl.chem., MAGDEBURG / NDR / (54) Casting Rolling Oil (51) Int. Cl? C 10 M 1/14 MXSTECKI HANS dipl.chem.

G0NSCH3ER GUNTER dipl.ing..FEEIBERGHERRMANN HARTI dipl.chem., ANNABERG / BUCHHOLZ

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rolling oil for the production of strips and foils of aluminum cast strips.

It is known to add low-grade mineral oils as process lubricants. These mineral oils may contain various active ingredients to achieve a particular friction reduction effect, improve ductility and improve other technological parameters such as surface quality, dimensional stability and poresitapholia.

According to DE Pat. It is known that the addition of fatty alcohols reduces the friction of the rolling process and improves ductility. In addition, by adding natural products with an ester structure, such as fatty oils, coconut oil and equally adapted synthetic products such as butyl stearate, the rolling process is improved. In order to achieve a removal during operation, DE Pat. They also use free fatty acids. Known compounds containing heteroatoms, such as tricresyl phosphate, are added as EP additives in lubricating oil according to DAS 1 265 900 in order to positively influence the wear of the steel rollers and to achieve non-permanent properties. Furthermore, it is known to increase the lifetime of heat-loaded oils by aging inhibitors such as di-tertiarybutyl paracresol. 199,097 2,199,097

For special working steps in cold rolling aluminum from pre-hot rolled material, combinations of active ingredients are used. When rolling cold-rolled aluminum sheets, it is in contrast to pre-hot rolled materials by converting the cast structure directly into cold forming, bitter ductility due to different grain structure, poor texture, and higher oversaturation of mixed crystal elements. The known rollers are not, by virtue of technological peculiarities, capable of ensuring that the technical parameters needed for the economical operation of the forming machines are achieved on the rolling mills corresponding to the state of the art; in particular, the use of known rolling oils increases the number of garments and the rolled structure occurs. The base oils used so far allow the active ingredients to act under a limited range of performance, based on the individual processing stages of the cast strips. For example, it may be possible to achieve speeds for which the machines are designed and cannot be rolled out of a 4 nm thick film of sheet. The limited range of action of the known base oils in relation to the effect of known additives does not permit the setting of optimum visco-oil ratios to resistance when the cast strip is changed. In addition, the proposed solutions have the advantage that the base oils and active ingredients used to support the basic technological process adversely affect the parameters of the by-process processes. For example, the proposed fatty acids and fatty products exacerbate the results of the annealing process, in which spots and stickiness appear. The necessary increase in the rolling stock results in an increase in these drawbacks. SUMMARY OF THE INVENTION It is an object of the present invention to provide a rolling oil that allows aluminum strip and aluminum foil to be rolled out of the aluminum strip as a starting material, maximizing the performance of installed rolling stands corresponding to the current state of the art, without adversely affecting the technological side characteristics. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a base oil which has a broader action for added additives and which, by means of a suitable combination of these active ingredients, guarantees the rollability of the material throughout the processing process from aluminum cast sheets as starting material to aluminum foil. The combination of active ingredients must eliminate the contradictory negative effect on action in relation to the technological baseline process and properties in the improvement of technological side processes.

Low viscosity oil | with the following characteristics: viscosity at 20 ° C 3.2 to 9.2 o mm / s viscosity at 50 ° C 1.5 to 4.5 Q mm / s flash point 101 to 170 ° C boiling range 220 to 340 ° C Engler distillation analysis medium molar mass 175 to 215 g / mol 3 199 097 grouping of compounds by IR spectroscopy 1 aromatics 0 to 30% 1 'naphthenes 0 to 50% 1' paraffins 30 to 100% density 0 75 to 0.87 g / cm2 prepared from paraffinic oil by distillation, acidic and basic refining or distillation, selective refining on molecular sieves, chemical refining or distillation, selective refining on molecular sieves, distillation, acid refining and optionally mixed fractions, shows a substantially wider range of action for the active ingredients during rolling. The wide range of action of this base oil in conjunction with the additives exhibits variations in the rolling, rolling torque and rolling forces required. When using the described 0.2 to 4 wt% 0.1 to 4 wt% 0.1 to 0.4 wt% 0.01 to 0.5 wt% 0.01 to 2 wt% 0.1 to 1 wt% of base oil, the combination of the active substances consisting of a medium chain fatty alcohol C 1 -, butyl stearate and / or epoxidized fatty acid butyl ester, oleylsarcosine, a fatty acid containing at least 50%, and optionally cresylphosphate or diphenylcresylphosphate; beyond the passage that exhausts the technical capabilities. With this combination, the overall production line is manageable, and the grading of the active ingredient concentration of the individual components allows for an optimal adaptation to the individual working stage of the overall production line. By adding a special amino acid, oleyl sarcosine, it is possible to eliminate the additional static charge and the associated fire risk by utilizing the total active ingredients active for rolling and using only a small proportion of other fatty acids. The reduction of the free fatty acids in the active ingredient combination results in the elimination of the so far occurring adsorption blocking of surfactant filter aids in a cleaning system, although the active ingredient combinations disclosed result in a consequent active rolling action to poorer filtering of small wear particles. Surprisingly, it has been found that the oxygen-containing active ingredients contained in this combination result in improved annealing properties over the known effective combinations. In particular, the addition of epoxidized fatty acid butyl ester leads to inhibition which has so far been achieved only by the addition of inhibitors which have been adversely affected by rolling. In contrast to the prior art, it has been found that the aluminum foil using the lubricants of the invention can be rolled to a lower thickness, the higher its strength. The theoretical derivations, regardless of the effect of the lubricating agents, still give the opposite proportion. Accordingly, the foils should be rolled more thinly, the lower their strength. The following table lists the parameters of the aluminum strip processed by the use of rolling oils according to Examples 1 to 4 below.

Table material Thickness range (mm) strip width (mm) Rolling speed (m / min) per-pass inspection (%) Quality Annealing behavior at 400 ° C in air 1 Hot-rolled aluminum strip Aluminum cast strip 8 - 0 , 5 1200 450 57 very good no-to-thin spots lerance thickness, dry surface 2 foil strip 50-5 pan 1400 720 54 pore-free, tiny specks lerance thickness 3 aluminum cast strip aluminum alloy 8 - 0.2 1550 600 51 very good, no-to-thin spots lerance thickness 4 aluminum cast strip aluminum alloy 8-2 1050 350 59 very good no to tiny stains thickness, dry surface 5 199097 Example 1 In mineral oil, prepared distillation and subsequent refining, with the following structural grouping: π aromatically boundπ naphthenic bound paraffinically bound with characteristic viscosities at 20 ° density at 20 ° flash point 16% 24% 60% values

5.6 mm < 2 &gt; / s 0.850 g / ml &lt; RTI ID = 0.0 &gt; 108 C &lt; / RTI &gt; are admixed to form a homogeneous mixture according to the following recipe: up to 70 ° C base oil fatty alcohol <C1O to C16} epoxidized fatty acid butyl ester with a minimum of 90% up to Ο 6 -oleylsarcosine lauric acid (min. 80% C. 96.5% w / w 1% w / w 0.25% w / w) 0.25% w / w Example 2 Base oil, prepared by distillation, refined by molecular sieve, redistillation by additional chemical with a structural grouping of C. 100% by weight paraffinic and with viscosity characteristics at 20 ° C 3.4 mm 2 / s density at 20 ° C 0.78 g / ml

Flash point 101 ° C is mixed with heating up to a maximum of 70 ° C and with stirring to form a homogeneous solution with admixtures according to the following formula: basic oily alcohol (Ο ^ θ up to 98.3% 0.5% by weight 6 199097poxidized fatty acid butyl ester) from 90% C g ažΟΟΟeyeyeyeyeyl sarcosine lauric acid (min. 80% C ^)) tricresylphosphate 0.5% w / w 0.1% w / w 0.5% w / w 0.1% w / w Example 3 To base oil, prepared from a mixture of mineral oil fractions obtained by distillation followed by refining on a molecular mesh and a chemical refining with a structural grouping of n aromatically bound naphthenic bonded paraffinic and characteristic

viscosity at 20 ° C Density at 20 ° C Flash point 112 ° 0 add admixtures according to the following recipe with warming up to a maximum of 60 ° C: 21.5% w / w 29.5% w / w49.0% w / w 4.8 mm2 / s0,795 g / ml base oil fatty alcohol (C 1-6 to C 16 g) butyl stearate epoxidized fatty acid butyleeter with chain lengths. from 90% C g g to C ^ololeylsarcosine lauric acid (minimum 70% C ^ gg) 94.7% by weight 3% by weight 1% by weight 1% by weight 0.05% by weight 0.25% by weight Example 4 Base oil prepared from mixtures of mineral oil fractions obtained by distillation followed by refining on a molecular network and chemical refining with a structural grouping 7 193 097 Π aromatically bound to naphthenic bonded paraffinically bound 28,4% by weight 37,7% by weight33,9% by weight and with characteristic viscosity values at 20 Density at 20 [deg.] C. Flash point 7.10 mm &lt; 2 &gt; / s0.83 g / ml

117 ° C with heating of the recipe: to a maximum temperature of 70 ° C and mixing with admixture according to the following base oil fatty alcohol (C 10 to C 16) butyl stearate oleylsarcosine lauric acid (minimum 60% C 12) tricresylphosphate 97.94% 1% by weight 0 5% by weight 0.01% by weight 0.5% by weight 0.05% by weight

Claims (1)

BRIEF DESCRIPTION OF THE INVENTION Rolling oil for aluminum cast strips based on a low-viscosity mixture of refined mineral oil with fatty alcohols and active ingredients by effective rolling and optionally with 0.1 to 1% by weight of tricresylphosphate or diphenylcurylphosphate, characterized in that the mixture consists of 0 2 to 4% by weight of a fatty alcohol having a chain length of from 0 to 0% and from 0.1 to 4% by weight of a fatty acid ester such as butyl stearate / or 0.1 to 4% by weight 0.01 to 0.5% by weight. 1 to 2% by weight to 100% by weight of epoxidized fatty acid butyl ester, the chain length of which is at least 90% C g až to ololeylsarcosine or oleylsarcosinate acid with a minimum of 50% C ^ 2 and low viscosity oil component with viscosity at 20 ° Viscosity at 50 ° Boiling point mean molecular weight distribution of groups 3.2 to 9.2 mm2 / s1.5 to 4.5 mm / s220 to 340 ° C 175 to 215 g and with an aromatically bound naphthenic bond, paraffinically bound 0 to 30% 0 to 50% 30 to 100%. Price 2.40 Kčs TZ 6/70