JPS635437B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to rolling oil. Conventionally, palm oil has been used as a rolling oil for steel plates for a long time, but instead, animal and vegetable oils such as beef tallow, lard, Nagasu whale hardened oil, mineral oils, or mixtures of these oils are used as base oils, and additives and oil-based oils are used as rolling oils. Products containing improvers, antioxidants, surfactants, etc. are widely used. On the other hand, the progress of rolling machinery equipment has progressed significantly, and as mills have become larger, there has been a demand for rationalization and precision of the rolling process, such as reducing the number of passes, increasing rolling speed, and increasing the standard accuracy of rolled products. As a result, the conditions for rolling oil are becoming more severe.
Palm oil and tallow-based rolling oils are no longer able to satisfy this condition, but at present no alternative rolling oil has yet been found. The present invention aims to provide a rolling oil that has better lubrication performance than conventional palm oil or beef tallow-based rolling oils and can satisfy the harsh rolling processes currently required. . The rolling oil of the present invention is composed of the following. (A) group is castor oil or hydrogenated castor oil (hereinafter referred to as hydrogenated castor oil); (B) group is castor oil with alkylene oxide added or hydrogenated castor oil with alkylene oxide added (C) group A castor oil derivative obtained by esterifying a part of the hydroxyl group of (A) or (B) with a fatty acid having 12 or more carbon atoms.As group (D), a hydroxyl group having an alkyl or alkenyl group having 11 or more carbon atoms. A castor oil derivative obtained by an esterification reaction between the carboxyl group of a dicarboxylic acid monoester obtained from a compound and a dicarboxylic acid and a part of the hydroxyl group of (A) or (B). ), (C), and (D) and a polyvalent epoxy compound having two or three glycidyl groups in the molecule. The present invention relates to a metal rolling oil characterized in that it is used as it is or, if necessary, mixed with animal and vegetable oils, mineral oils, surfactants, extreme pressure additives, etc. The hydrogenated castor oil in the present invention can be obtained by hydrogenating castor oil in a conventional manner. Castor oil to which alkylene oxide has been added or hydrogenated castor oil to which alkylene oxide has been added can be obtained by adding alkylene oxide to castor oil or hydrogenated castor oil by a conventional method. As the alkylene oxide, one having 2 to 3 carbon atoms is added in an amount of 2 to 100 moles. Furthermore, a castor oil derivative (hereinafter referred to as castor oil derivative (C)) obtained by reacting (A) or (B) with a fatty acid having 12 or more carbon atoms can also be obtained by a generally known esterification reaction. That is, the castor oil derivative (C) used in the present invention can be obtained by a dehydration esterification reaction between a hydroxyl group bonded to (A) or (B) and the above fatty acid, or by a reaction between (A) or (B) and the above fatty acid. It can also be obtained by transesterification with lower esters. However, the essential condition for this castor oil derivative (C) is that at least one hydroxyl group remains in the molecule of the castor oil derivative (C) at the end of the reaction, and 1 mol of (A) or (B) For the above fatty acids
It is obtained by reacting 0.5 to 2 moles. The fatty acids having 12 or more carbon atoms used to obtain the castor oil derivative (C) of the present invention include saturated fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, and behenic acid, neoacids, and Examples include side chain saturated fatty acids such as the obtained fatty acids, and unsaturated fatty acids such as oleic acid, linoleic acid, linolenic acid, arachidonic acid, and ricinoleic acid. Next, (A) is added to a dicarboxylic acid monoester obtained from a hydroxy compound having an alkyl or alkenyl group having 11 or more carbon atoms and a dicarboxylic acid.
The castor oil derivative obtained by reacting or (B) (hereinafter referred to as castor oil derivative (D)) is a castor oil derivative.
Similarly to (C), it is obtained by reacting 1 mole of (A) or (B) with 0.5 to 2 moles of the above dicarboxylic acid monoester, and the castor oil derivative (D) has at least 1 mole in the molecule. It is an essential condition that hydroxyl groups remain. In addition, the dicarboxylic acid monoester used to obtain the castor oil derivative (D) is a compound obtained by reacting a hydroxy compound having an alkyl or alkenyl group having 11 or more carbon atoms with a dicarboxylic acid at a molar ratio of 1:1. It has one carboxyl group in the molecule. Examples of hydroxy compounds having an alkyl or alkenyl group having 11 or more carbon atoms include lauryl alcohol, palmityl alcohol, cetanol, stearyl alcohol, oleyl alcohol, ethylene glycol oleate, propylene glycol laurate, propylene glycol stearate, and polyethylene glycol palmitate. , polyethylene glycol oleate, glycerin stearate, sorbitol laurate, sorbitol oleate, pentaerythritol stearate, etc., and those obtained by adding alkylene oxide to these hydroxy compounds,
Examples of dicarboxylic acids include dibasic carboxylic acids such as succinic acid, adipic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, and itaconic acid, and so-called dimer acids obtained by polymerizing unsaturated fatty acids. Next, the reaction product of at least one selected from the four groups (A), (B), (C), and (D) and the polyvalent epoxy compound is the reaction product of the above-mentioned (A), (B), ( It is synthesized according to a conventional method by reacting at least one member selected from the four groups C) and (D) with a polyvalent epoxy compound having two or three glycidyl groups in the molecule. That is, it is due to the addition reaction of a polyvalent epoxy compound to a hydroxyl group bonded to a compound of groups (A) to (D), and for 1 mole of at least one species selected from groups (A) to (D), It is obtained by reacting a polyvalent epoxy compound at a ratio of 0.3 to 2 moles at 70 to 120°C, and the compounds of groups (A) to (D) are crosslinked with the polyvalent epoxy compound, resulting in a chain or network reaction. yields a product. Examples of polyvalent epoxy compounds having two or three glycidyl groups in the molecule used in the present invention include ethylene glycol diglycidyl ether, glycerin triglycidyl ether, adipic acid diglycidyl ester, succinic acid diglycidyl ester,
Examples include dimer acid diglycidyl ester, polyalkylene glycol diglycidyl ether, and triglycidyl ether of glycerin alkylene oxide adduct. The reaction product of at least one selected from the above groups (A) to (D) and a polyvalent epoxy compound has extremely high rolling performance even when used as a rolling oil as it is, but if necessary, it can be used as a rolling oil. , and other animal and vegetable oils and fats, mineral oils, surfactants, and extreme pressure additives can be mixed therewith. The present invention will be explained below with reference to Examples. Example 1 941 parts of hydrogenated castor oil, 564 parts of oleic acid, and 15 parts of para-toluenesulfonic acid (hereinafter referred to as PTSA) were added.
The reaction was carried out at 150 to 180° C. for 7 hours under a N ₂ gas stream to obtain a castor oil derivative having an acid value of 1.8 and a hydroxyl value of 40.5. 174 parts of ethylene glycol diglycidyl ether and 2 parts of boron trifluoride etherate were added to this castor oil derivative and reacted at 80°C for 6 hours to obtain a reaction product with an acid value of 0.9 and a hydroxyl value of 69.0. . Example 2 1601 parts of hydrogenated castor oil with 15 moles of ethylene oxide added, 568 parts of isostearic acid, PTSA20
A castor oil derivative having an acid value of 5.6 and a hydroxyl value of 22.0 was obtained. Add PEG-400 to the above castor oil derivative at 100-110℃.
-250 parts of diglycidyl ether was added and reacted for 6 hours to obtain a reaction product with an acid value of 2.0 and a hydroxyl value of 15. Example 3 Castor oil with 50 moles of ethylene oxide added
342 parts of adipic acid diglycidyl ester was added to 3135 parts and reacted at 80 to 100°C for 6 hours to obtain a reaction product having an acid value of 1.0 and a hydroxyl value of 48.0. Example 4 935 parts of castor oil, 368 parts of maleic acid monooleyl ester, and 13 parts of PTSA were added, and the mixture was heated under a stream of _N2 gas.
React at 150-180℃ for 10 hours, acid value 1.5, hydroxyl value
A castor oil derivative of 86.2 was obtained. 87 parts of ethylene glycol diglycidyl ether was added to the above castor oil derivative and reacted at 80 to 100°C for 6 hours to obtain a reaction product with an acid value of 1.0 and a hydroxyl value of 88.0. The reaction products of Examples 1 to 4 were subjected to a rolling performance test as shown in Table 1, either alone or as a blend. The friction coefficient (μ) and pressure resistance of rolling oils No. 1 to 4 were measured, and the results are shown in Table 2. Further, for rolling oil Nos. 1 and 2, the oil was applied as it was to the rolling material, and for Nos. 3 and 4, a 15% emulsion was applied to the rolling material for testing. The amount of oil adhering to the rolled material was set to about 1 g/m ² for all Nos. 1 to 4.

【table】

[Table] The results of the rollability test are shown in Figure 1 as a rolling performance evaluation based on the relationship between rolling reduction (%) and rolling load (ton). A commercially available tallow-based rolling oil was used as a comparative sample. The test method for the lubricating oil for rolling oil for steel plates of the present invention is as follows. Friction coefficient test method Soda type pendulum type oil tester N-type load capacity test method Shell type high speed four ball friction tester rolling test method Rolling mill: Four-roll rolling mill Work roll diameter 150mm Width 140mm Back-up roll diameter 250mm Width 140mm Roll material: Chrome steel Roll circumferential speed: 30m/min Rolling material: SPC-C Thickness 0.60mm x Width 50mm x Length 150mm Method of measuring rolling performance 2 rolls are placed on the steel plate before rolling at 50mm intervals (l ₁ ).
A line was drawn, the line was rolled, the distance (l ₂ ) after rolling was measured, and the rolling reduction was determined using the following formula. Rolling ratio (%) = l ₂ −l ₁ /l ₂ ×100 In addition, the rolling load (ton) at that time was measured using a load cell.

[Brief explanation of the drawing]

The drawing is a rolling performance comparison diagram showing the rolling performance of Examples and Comparative Examples in terms of the relationship between rolling load (ton) and rolling reduction (%).

Claims (1)

[Scope of Claims] 1. Castor oil or hydrogenated castor oil as group (A); (B) castor oil with alkylene oxide added, or hydrogenated castor oil with alkylene oxide added; (C) as group (A). ) or a castor oil derivative obtained by esterifying a part of the hydroxyl group of (B) with a fatty acid having 12 or more carbon atoms.Group D is a hydroxy compound having an alkyl or alkenyl group having 11 or more carbon atoms and a dicarboxylic acid. A castor oil derivative obtained by an esterification reaction between the carboxyl group of a dicarboxylic acid monoester obtained from an acid and a part of the hydroxyl group of (A) or (B). The main component is a reaction product obtained by the reaction of at least one member selected from the four groups C) and (D) with a polyvalent epoxy compound having two or three glycidyl groups in the molecule, and as it is. , or a metal rolling oil characterized in that it is mixed with animal and vegetable oils, mineral oils, surfactants, extreme pressure additives, etc., as necessary.