JPS635439B2 - - 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.
Balm oil and tallow-based rolling oil are no longer able to satisfy this condition, but at present no alternative rolling oil has 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. The carboxyl group of a dicarboxylic acid monoester obtained from a dicarboxylic acid and a hydroxy compound having an alkyl group or alkenyl group having 11 or more carbon atoms as the group (A), and a part of the hydroxyl group of castor oil or hydrogenated castor oil. Castor oil derivative obtained by esterification reaction with Carboxyl group of dicarboxylic acid monoester obtained from dicarboxylic acid and a hydroxyl compound having an alkyl group or alkenyl group having 11 or more carbon atoms as group (B), and castor oil with alkylene oxide added or hydrogen with alkylene oxide added. A castor oil derivative obtained by an esterification reaction with a portion of the hydroxyl groups of added castor oil. The main component is a reaction product obtained by the reaction of at least one member selected from the above group (A) or (B) with a dicarboxylic acid, and can be used as is or as necessary,
The present invention relates to a metal rolling oil characterized in that it is used in combination with animal and vegetable oils, mineral oils, surfactants, extreme pressure additives, and the like. The hydrogenated castor oil in the present invention is obtained by hydrogenating castor oil by a conventional method (hereinafter referred to as hydrogenated castor oil). 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 dicarboxylic acid monoester obtained from a hydroxy compound having an alkyl group or an alkenyl group having 11 or more carbon atoms and a dicarboxylic acid,
Castor oil derivative obtained by reacting castor oil or hydrogenated castor oil (hereinafter referred to as castor oil derivative (A))
is obtained by a generally known esterification reaction. That is, the castor oil derivative used in the present invention
(A) is obtained by a dehydration esterification reaction between a hydroxyl group bonded to castor oil or hydrogenated castor oil and the above dicarboxylic acid monoester. however,
It is essential that this castor oil derivative (A) has at least one hydroxyl group remaining in the molecule of the castor oil derivative (A) at the end of the reaction. It is obtained by reacting 0.5 to 2 moles of the above dicarboxylic acid monoester. Next, a dicarboxylic acid monoester obtained from a hydroxy compound having an alkyl group or an alkenyl group having 11 or more carbon atoms and a dicarboxylic acid,
Castor oil derivatives (hereinafter referred to as castor oil derivatives (B)) obtained by reacting castor oil to which alkylene oxide has been added or hydrogenated castor oil to which alkylene oxides have been added (hereinafter referred to as castor oil derivatives (B)) are similar to castor oil derivatives (A). The above dicarboxylic acid monoester per mol of castor oil with added oxide or hydrogenated castor oil with added alkylene oxide.
Castor oil derivative obtained by reacting 0.5 to 2 mol
The essential condition for (B) is that at least one hydroxyl group remains in the molecule. Also castor oil derivative (A) or castor oil derivative (B)
The dicarboxylic acid monoester used to obtain is a compound obtained by reacting a hydroxy compound having an alkyl group or alkenyl group with 11 or more carbon atoms and a dicarboxylic acid at a molar ratio of 1:1, and has a carboxyl group in the molecule. Has 1 piece. Examples of hydroxy compounds having an alkyl group 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. tate, polyethylene glycol oleate, glycerin stearate, sorbitol laurate, sorbitol oleate,
Examples include pentaerythritol stearate, etc., and alkylene oxide added to these hydroxy compounds, and dicarboxylic acids include dibasic acids such as succinic acid, adipic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, and itaconic acid. Examples include so-called dimer acids obtained by polymerizing carboxylic acids, their acid anhydrides, and unsaturated fatty acids. Next, the reaction product of at least one member selected from group (A) or (B) and dicarboxylic acid is an ester of a hydroxyl group bonded to the castor oil derivative of (A) or (B) and dicarboxylic acid. It is synthesized according to a conventional method by a chemical reaction. That is, for 1 mole of at least one species selected from group (A) or (B), dicarboxylic acid
It is obtained by reacting 0.3 to 2 moles at a molar ratio of 130 to 200°C, and the castor oil derivatives of group (A) and/or (B) are crosslinked with dicarboxylic acid to form a chain or network reaction product. bring about things. The dicarboxylic acids used in the present invention include dibasic carboxylic acids such as succinic acid, adipic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, and itaconic acid, their acid anhydrides, and those obtained by polymerizing unsaturated fatty acids. Examples include so-called dimer acids. The reaction product of at least one selected from the group (A) or (B) above and a dicarboxylic acid has extremely high rolling performance even when used as a rolling oil as it is, but other products may be used as needed. It is possible to use a mixture of animal and vegetable oils, mineral oils, surfactants, and extreme pressure additives. The present invention will be explained below with reference to Examples. Example 1 941 parts of hydrogenated castor oil, 368 parts of maleic acid monooleyl ester, para-toluenesulfonic acid (hereinafter referred to as
(denoted as PTSA) 13 parts under _N2 gas stream for 150-180 min.
The reaction was carried out at ℃ for 10 hours to obtain a castor oil derivative having an acid value of 1.5 and a hydroxyl value of 82.6. Add 101 parts of sebacic acid to this castor oil derivative.
Reacted at 150-180℃ for 8 hours, acid value 4.2, hydroxyl value 7.5
A reaction product was obtained. Example 2 624 parts of stearic acid diglyceride and 100 parts of succinic anhydride were reacted at 100 to 110°C for 4 hours under a N ₂ gas stream to obtain stearic acid diglyceride succinate. Next, 935 parts of castor oil and 15 parts of PTSA were added and reacted at 150 to 180°C for 10 hours under a N ₂ gas stream to obtain a castor oil derivative having an acid value of 5.0 and a hydroxyl value of 70.0. In addition to this castor oil derivative, maleic anhydride
Add 49 parts and react at 150-180℃ for 10 hours, acid value 5.5,
A reaction product with a hydroxyl value of 8.0 was obtained. Example 3 Castor oil with 3 moles of ethylene oxide added
1067 parts, adipic acid monostearyl ester 288
and 13 parts of PTSA at 150-180 °C under _N2 gas flow.
After reacting for 10 hours, a castor oil derivative with an acid value of 2.0 and a hydroxyl value of 79.0 was obtained. In addition to this castor oil derivative, azelaic acid 94
The mixture was reacted at 150 to 180°C for 10 hours to obtain a reaction product with an acid value of 5.0 and a hydroxyl value of 10.2. Example 4 1601 parts of hydrogenated castor oil with 15 moles of ethylene oxide added, sebacic acid monolauryl ester
370 parts and 20 parts of PTSA at 150-180℃ under _N2 gas flow
The mixture was reacted for 12 hours to obtain a castor oil derivative with an acid value of 2.0 and a hydroxyl value of 62.0. In addition to this castor oil derivative, 100% of dimer acid
150 to 180°C for 15 hours to obtain a reaction product with an acid value of 5.7 and a hydroxyl value of 9.0. 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. For rolling oil No. 1, the oil was applied as it was to the rolling material, and for Nos. 2 to 4, the oil was applied as a 15% emulsion and tested. The amount of oil adhering to the rolled material was set to 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 regarding the lubricity of the 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 At that time, the rolling load (ton) 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. A carboxyl group of a dicarboxylic acid monoester obtained from a dicarboxylic acid and a hydroxy compound having an alkyl group or alkenyl group having 11 or more carbon atoms as the (A) group, and castor oil or hydrogenated castor Castor oil derivatives obtained by esterification reaction with a portion of the hydroxyl groups of the oil. The carboxyl group of a dicarboxylic acid monoester obtained from a dicarboxylic acid and a hydroxy compound having an alkyl group or alkenyl group having 11 or more carbon atoms as group (B), and castor oil with an alkylene oxide added or hydrogen with an alkylene oxide added. A castor oil derivative obtained by an esterification reaction with a portion of the hydroxyl groups of added castor oil. The main component is a reaction product obtained by the reaction of at least one member selected from the above group (A) or (B) with a dicarboxylic acid, and it can be used as it is or if necessary, added with animal or vegetable oil, mineral oil, or surfactant. A metal rolling oil characterized by containing a mixture of additives, extreme pressure additives, etc.