JP6348839B2 - Rinsing agent composition for steel sheet - Google Patents

Description

  The present invention relates to a rinsing agent composition used in a rinsing process after cleaning and a method for manufacturing a steel plate in cleaning in steel strip manufacturing.

  When manufacturing a cold-rolled steel sheet and a cold-rolled coil, it goes through various processing steps. As the treatment step, there is an acid cleaning step for removing the oxide layer, or an alkali cleaning step for removing rolling oil or rust preventive oil. In these cleaning steps, an acidic or alkaline cleaning solution is rinsed with warm water and dried with hot air. Since rust is generated when the drying is insufficient, draining to remove water adhering to the steel sheet is an important process, and various draining methods are implemented. As the draining method, water is mechanically squeezed with a rubber roll called a ringer roll, or an air wiper is attached before hot air drying, and water attached to the steel sheet is skipped as much as possible. Further, the temperature of the rinsing water when rinsing the cleaning liquid is generally 70 ° C. or higher in order to improve the drying property. However, since a large amount of water is used for this rinsing, it takes a lot of energy costs to raise the temperature to a predetermined temperature. There is also a need to improve the productivity of steel sheets.

  Patent Document 1 discloses a specific cation as a rinsing agent composition that is inexpensive and has no adverse effects on the subsequent process even if it remains on the surface of the steel strip, has a small wastewater treatment load, and can reduce the cost of steam for raising the temperature of rinse water. A rinsing agent composition for steel sheet containing a functional compound and a specific nonionic compound is disclosed.

JP 2006-265726 A

  Patent Document 1 describes a steel sheet rinsing agent in which a specific amine compound and a specific nonionic surfactant are blended. However, in order to further reduce the steam cost for raising the temperature of the rinse water and further improve the productivity of the steel sheet, a rinsing process in a short time by increasing the line speed is desired.

  The subject of this invention is providing the rinse agent composition for steel plates which is excellent in the drainage property also in the rinse process in low temperature, and is excellent in the drainage property also in the short rinse process rather than the conventional rinse agent.

（式中、Ｒ^１は炭素数６以上２２以下の炭化水素基を示し、Ｒ^２は水素原子又は炭素数１以上２２以下の炭化水素基、Ｒ^３及びＲ^４は、同一又は異なって、水素原子又は炭素数１以上３以下の炭化水素基を示す。Ｘ^―は無機アニオンあるいは有機アニオンを示す。）で表される化合物から選ばれる少なくとも１種である成分（ａ）と、下記一般式（２）：
Ｒ^５−Ｏ−（Ａ^１Ｏ）_ｍＨ （２）
（式中、Ｒ^５は炭素数１０以上２０以下の直鎖又は分岐鎖のアルキル基又はアルケニル基、Ａ^１Ｏは炭素数２以上４以下のアルキレンオキシ基、ｍは平均付加モル数を示し、１以上１００以下の数である。ｍ個のＡ^１Ｏはそれぞれ同一でも異なっていても良い。）で表される化合物から選ばれる少なくとも１種である成分（ｂ）と、炭素数１２以上２２以下の脂肪酸と水酸基数が２以上６以下の多価アルコールとのエステルから選ばれる少なくとも１種である成分（ｃ）とを含有する、鋼板用リンス剤組成物である。 The rinse agent composition for steel sheets of the present invention has the following general formula (1):

(Wherein R ¹ represents a hydrocarbon group having 6 to 22 carbon atoms, R ² represents a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, R ³ and R ⁴ are the same or different, .X indicating the atom or having 1 or more carbon atoms of 3 or less hydrocarbon groups ^-. the component (a) is at least one selected from compounds represented by) indicating an inorganic anion or an organic anion, the following general formula ( 2):
R ⁵ —O— (A ¹ O) _m H (2)
(In the formula, R ⁵ is a linear or branched alkyl group or alkenyl group having 10 to 20 carbon atoms, A ¹ O is an alkyleneoxy group having 2 to 4 carbon atoms, m represents the average number of moles added, The number of m A ¹ Os may be the same or different, and at least one component (b) selected from the compounds represented by: It is the rinse agent composition for steel plates containing the following fatty acid and the component (c) which is an at least 1 sort (s) chosen from the ester of the polyhydric alcohol whose hydroxyl number is 2-6.

  ADVANTAGE OF THE INVENTION According to this invention, the rinse agent composition for steel plates which is excellent in the drainage property also in the rinse process in low temperature than the conventional rinse agent, and is excellent in the drainage property also in the short rinse process can be provided.

<Rinsing agent composition for steel plate>
The steel sheet rinse agent composition of the present embodiment (hereinafter referred to as the steel sheet rinse agent composition α, also simply referred to as the rinse agent composition α) is at least one selected from the compounds represented by the general formula (1). Component (a) which is a seed, Component (b) which is at least one selected from the compound represented by Formula (2), a fatty acid having 12 to 22 carbon atoms and a hydroxyl number of 2 to 6 The component (c) which is at least 1 sort (s) chosen from ester with the polyhydric alcohol of this is contained.

  The rinse agent composition α for a steel sheet according to the present embodiment contains the component (a) and the component (b) described in Patent Document 1. And compared with the said patent document 1, in order to reduce a steam cost and to improve the rinse process effect in a short time, the rinse agent composition (alpha) for steel plates of this embodiment contains a component (c) further. . The steel sheet rinse agent composition α of the present embodiment is superior in drainage property even in a rinsing process at a low temperature, and in a drainage property even in a short-term rinse treatment, as compared with a conventional rinse agent. The reason for this effect is not clear, but it is considered as follows.

  When the cationic compound of component (a) is adsorbed on the steel strip, the surface of the steel strip is hydrophobized and exhibits sufficient drainage. Component (b) is likely to form micelles at a lower concentration than component (a), and is considered to form micelles in which component (a) and further component (c) are incorporated in the micelle of component (b). And when the component (a) in the micelle is adsorbed on the steel sheet surface, the component (c) is also adsorbed on the steel sheet surface by ester groups and further hydroxyl groups on the steel sheet, so that the water is drained by the hydrophobic group of the component (c). It is considered that the property is further improved. Generally, when the line speed of steel plate production is increased, the amount of adsorption of each component of the rinse agent composition tends to decrease, but it is sufficient by increasing the amount of adsorption of component (a) and adsorbing component (c). It is thought that drainage is maintained.

[Component (a)]
Component (a) is at least one organic cationic compound selected from the compounds represented by the general formula (1), preferably an alkylamine acid salt and an alkylammonium salt, more preferably Alkylamine acid salt.

In the general formula (1), R ¹ has 6 or more carbon atoms, and is preferably 8 or more, more preferably 12 or more, still more preferably 16 or more, from the viewpoint of sufficiently hydrophobizing the steel sheet surface. It is 22 or less, preferably 18 or less, and from the viewpoint of sufficiently hydrophobizing the steel sheet surface, a linear or branched alkyl group or alkenyl group is preferable, and a linear alkyl group or alkenyl group is preferable. Examples of R ¹ include hexyl group, octyl group, 2-ethylhexyl group, decyl group, lauryl (dodecyl) group, tridecyl group, myristyl (tetradecyl) group, palmityl (hexadecyl) group, stearyl (octadecyl) group, and behenyl. Group, oleyl group, etc. From the viewpoint of sufficiently hydrophobizing the steel sheet surface, hexyl group, octyl group, lauryl (dodecyl) group, tridecyl group, myristyl (tetradecyl) group, palmityl (hexadecyl) group, stearyl (octadecyl) ) Group, behenyl group and oleyl group are preferred, and palmityl (hexadecyl) group, stearyl (octadecyl) group, behenyl group and oleyl group are more preferred.

In the general formula (1), R ² is preferably a hydrogen atom or 1 or more carbon atoms, and from the viewpoint of sufficiently hydrophobizing the steel sheet surface, preferably 6 or more, more preferably 8 or more, still more preferably 12 or more, and even more. Preferably, it is 16 or more, and is 22 or less, preferably 18 or less. From the viewpoint of sufficiently hydrophobizing the steel sheet surface, a linear or branched alkyl group or alkenyl group is preferable, and a linear alkyl group or An alkenyl group is more preferred. Examples of R ² include hydrogen atom, methyl group, ethyl group, isopropyl group, hexyl group, octyl group, 2-ethylhexyl group, decyl group, lauryl (dodecyl) group, tridecyl group, myristyl (tetradecyl) group, palmityl. (Hexadecyl) group, stearyl (octadecyl) group, behenyl group, oleyl group and the like can be mentioned. R ² is preferably a hydrogen atom from the viewpoint of sufficiently hydrophobizing the steel sheet surface.

R ³ and R ⁴ are the same or different and represent a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms such as a methyl group, an ethyl group, and an isopropyl group, and from the viewpoint of sufficiently hydrophobizing the steel sheet surface, Atoms are preferred.

Specific examples of X ⁻ include halide ions such as chloride ions and bromide ions, organic anions obtained by removing protons from organic acids such as acetic acid, lactic acid and citric acid, and alkyl sulfate ions having 1 to 5 carbon atoms ( CH ₃ SO ₄ ⁻ , C ₂ H ₅ SO ₄ ⁻ , C ₃ H ₇ SO ₄ ⁻ etc.), alkyl carbonate ions (CH ₃ CO ₃ ⁻ ), alkyl phosphate ions, etc. From the viewpoint of hydrophobization, halide ions such as chloride ions and bromide ions and organic anions such as CH ₃ CO ₃ ^— are preferable, and organic anions are more preferable.

As the component (a), dioctylamine, didecylamine, dilaurylamine, dimyristylamine, decyloctylamine, lauryloctylamine, laurylamine, lauryldimethylamine, myristylamine, myristyldimethylamine, palmitylamine, palmityldimethylamine , Stearylamine, stearyldimethylamine, oleylamine, acid neutralized product or quaternized product (quaternary ammonium salt) of oleyldimethylamine. In the case of an acid neutralized product, at least one of R ² , R ³ and R ⁴ is a hydrogen atom.

  Preferred acids for obtaining an acid neutralized product include hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, acetic acid, formic acid, maleic acid, fumaric acid, citric acid, tartaric acid, adipic acid, sulfamic acid, toluenesulfonic acid, lactic acid, pyrrolidone -2-carboxylic acid, succinic acid and the like are mentioned, and from the viewpoint of sufficiently hydrophobizing the steel sheet surface, hydrochloric acid and acetic acid are preferable, and acetic acid is more preferable. Preferred quaternizing agents for obtaining quaternary ammonium salts include alkyl halides such as methyl chloride, ethyl chloride, methyl bromide and methyl iodide, dimethyl sulfate, diethyl sulfate, di-n-propyl sulfate and the like. The general alkylating agent of these is mentioned.

  The component (a) is an acid neutralized product of monoalkylamine having 6 to 22 carbon atoms, an acid neutralized product of monoalkylmethylamine having 6 to 22 carbon atoms, and having 6 to 22 carbon atoms. Acid neutralized product of monoalkyldimethylamine, acid neutralized product of dialkylmethylamine having 1 to 22 carbon atoms, acid neutralized product of dialkyldimethylamine having 1 to 22 carbon atoms, carbon number of 6 to 22 Examples thereof include the following alkyltrimethylammonium and dialkylammonium having 1 to 22 carbon atoms. Specifically, laurylamine hydrochloride, stearylamine hydrochloride, oleylamine hydrochloride, hexylamine acetate, behenylamine acetate, laurylamine acetate, myristylamine acetate, palmitylamine Acetate, stearylamine acetate, oleylamine acetate, dioctylamine hydrochloride, lauryltrimethylammonium bromide, stearyltrimethylammonium chloride, oleyltrimethylammonium chloride, lauryltrimethylammonium chloride, myristyltrimethylammonium chloride, palmityltrimethylammonium chloride , Stearyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, dioctyl dimethyl ammonium chloride , Dilauryldimethylammonium chloride, dimyristyldimethylammonium chloride, distearyldimethylammonium chloride, dioleyldimethylammonium chloride, and the like. From the viewpoint of sufficiently hydrophobizing the steel sheet surface, hexylamine acetate, octylamine Acetate, laurylamine acetate, hexadecylamine acetate, oleylamine acetate, stearylamine acetate, behenylamine acetate, hexylamine hydrochloride, octylamine hydrochloride, laurylamine hydrochloride Hexadecylamine hydrochloride, oleylamine hydrochloride, stearylamine hydrochloride and behenylamine hydrochloride are preferred, hexadecylamine hydrochloride, oleylamine hydrochloride and oleylamine acetate are more preferred. Arbitrariness.

  The concentration of the component (a) is preferably 5 mg / kg or more, more preferably 10 mg / kg or more, still more preferably 12 mg / kg or more, from the viewpoint of sufficiently hydrophobizing the steel sheet surface, and an excessive component (a). Is not more than 1000 mg / kg, more preferably not more than 800 mg / kg, still more preferably not more than 500 mg / kg, and more preferably 300 mg / kg. The following is more preferable, 150 mg / kg or less is more preferable, 100 mg / kg or less is still more preferable, and 70 mg / kg or less is still more preferable.

[Component (b)]
The component (b) is at least one compound selected from the compounds represented by the general formula (2).

In the general formula (2), A ¹ O means an alkyleneoxy group having 2 to 4 carbon atoms such as an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group. Of these, an ethyleneoxy group and a propyleneoxy group are preferable. There may be a plurality of types of A ¹ O. In that case, block bonds, random bonds, alternating bonds, etc. can be used, block bonds and / or random bonds are preferred, and random bonds are more preferred.

In the general formula (2), R ⁵ is a linear or branched alkyl or alkenyl group having 10 or more carbon atoms, preferably 12 or more, and 20 or less, preferably 18 or less. Examples of the alkyl group include a decyl group, a sec-decyl group, a lauryl (dodecyl) group, a sec-lauryl group, a myristyl group, a cetyl group, a palmityl group, and a stearyl group. A decyl group, a lauryl group, a myristyl group, and a palmityl group are exemplified. Group and a stearyl group are preferable, and a myristyl group, a palmityl group, and a stearyl group are more preferable. In the general formula (2), m represents an average added mole number, 1 or more, preferably 3 or more, more preferably 10 or more, and 100 or less, preferably 50 or less, more preferably 40 or less, and still more preferably. Is 35 or less, more preferably 30 or less.

  Specifically, the component (b) includes one or more selected from the following.

C _j1 H _{2j1 + 1} −O (EO) _p1 H
C _j1 H _{2j1 + 1} -O (EO) _q1 (PO) _r1 H (however, EO and PO are added as a block)
C _j1 H _{2j1 + 1} -O (PO) _r1 (EO) _q1 H (however, EO and PO are added as a block)
C _j1 H _{2j1 + 1} -O (EO) _s1 (PO) _t1 (EO) _u1 H (however, EO and PO are added as a block)
C _j1 H _{2j1 + 1} -O (EO) _q1 (PO) _r1 H (however, EO and PO are randomly added)

In the formula of the previous paragraph, EO is an ethyleneoxy group (C ₂ H ₄ O), PO is a propyleneoxy group (C ₃ H ₆ O), j1 is an integer of 10 to 20, p1, q1, r1, s1, t1 , U1 is the average number of moles added, p1 is a number from 3 to 40, q1 is a number from 1 to 40, r1 is a number from 1 to 40, s1 is a number from 1 to 30 and t1 is The number is from 1 to 30; u1 is a number from 1 to 30; q1 + r1 is a number from 3 to 100; and s1 + t1 + u1 is a number from 3 to 100.

More preferably, 1 or more things chosen from the following are mentioned.
_{C 18 H 35 O (EO)} 4 H, C 12 H 25 O (EO) 5 (PO) 2 (EO) 5 H, C 14 H 29 O (EO) 7 (PO) 2 (EO) 7 H, C ₁₆ H ₃₃ O (EO) ₇ (PO) ₂ (EO) ₇ H, C ₁₆ H ₃₃ O (EO) ₁₀ (PO) ₁₂ H, C ₁₈ H ₃₇ O (EO) ₁₀ (PO) ₉ H, C ₁₈ H ₃₇ O (EO) ₈ (PO) ₆ H (however, EO and PO are randomly added), C ₁₈ H ₃₇ O (EO) ₁₂ (PO) ₂₁ H (however, EO and PO are randomly added) ), C ₁₈ H ₃₇ O (EO) ₁₅ (PO) ₁₅ H (however, EO and PO are added as a block), C ₁₈ H ₃₇ O (EO) ₈ (PO) ₂₁ H (where EO and PO are Random addition).

  Note that (EO) and (PO) indicate that blocks are added in this order unless otherwise specified.

  The concentration of the component (b) in the rinse agent composition α is preferably 1 mg / kg or more, more preferably 3 mg / kg or more from the viewpoint of promoting the adsorption of the component (a) and promoting the hydrophobization of the steel sheet. And from the viewpoint of not hindering the subsequent annealing process and plating process, 500 mg / kg or less is preferable, 300 mg / kg or less is more preferable, 200 mg / kg or less is more preferable, and 100 mg / kg or less is more preferable. 80 mg / kg or less is more preferable, and 50 mg / kg or less is still more preferable.

  The mass ratio of the component (a) to the component (b) is preferably 0.1 or more in terms of (a) / (b) from the viewpoint of expressing water repellency and suppressing the adhesion of water on the steel sheet surface. The above is more preferable, 1.0 or more is further preferable, 2.0 or more is further preferable, 15 or less is preferable, 10 or less is more preferable, and 7.0 or less is further preferable.

[Component (c)]
Component (c) is at least one selected from esters of fatty acids having 12 to 22 carbon atoms and polyhydric alcohols having 2 to 6 hydroxyl groups.

  The number of carbon atoms of the fatty acid constituting the component (c) is 12 or more and 22 or less, preferably 14 or more, more preferably 16 or more, and preferably 20 or less from the viewpoint of sufficiently hydrophobizing the steel sheet surface. is there. The fatty acid constituting the component (c) is preferably a fatty acid having a linear or branched alkyl group or alkenyl group from the viewpoint of sufficiently hydrophobizing the steel sheet surface, and a fatty acid having a linear alkyl group or alkenyl group. More preferred. Examples of fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, behenic acid, oleic acid and the like. From the viewpoint of sufficiently hydrophobizing the steel sheet surface, myristic acid, palmitic acid, stearic acid, olein An acid is preferable, and stearic acid and oleic acid are more preferable.

  The polyhydric alcohol constituting component (c) has a hydroxyl number of 2 or more and 6 or less, preferably 3 or more, more preferably 4 or more, and preferably 5 from the viewpoint of sufficiently hydrophobizing the steel sheet surface. It is as follows. Examples of the polyhydric alcohol include polyalkylene glycol, glycerin, pentaerythritol, sorbitan, and sorbitol. From the viewpoint of sufficiently hydrophobizing the steel sheet surface, polyalkylene glycol, glycerin, and sorbitan are preferable, and sorbitan is more preferable. Further, the number of carbon atoms of the alkylene glycol of the polyalkylene glycol is preferably 2 or more, and preferably 4 or less, more preferably 3 or less. The average degree of polymerization of the alkylene glycol of the polyalkylene glycol is 1 or more, preferably 6 or more, and preferably 50 or less, more preferably 20 or less, still more preferably 15 or less.

  The number of ester groups in component (c) is 1 or more, preferably 5 or less, more preferably 3 or less.

  The esterification rate of the hydroxyl group of the ester of fatty acid and polyhydric alcohol is preferably [0.16 or more, more preferably 0.20 or more] in [number of ester groups / number of hydroxyl groups of polyhydric alcohol] in the ester compound. More preferably, it is 0.25 or more, preferably 0.80 or less.

  Esters include polyethylene glycol monolaurate, polyethylene glycol monomyristate, polyethylene glycol monostearate, polyethylene glycol monooleate, polypropylene glycol monooleate, polybutylene glycol monooleate, glycerol monooleate, glycerol dioleate, bentaerythritol mono Examples include oleate, sorbitan monostearate, sorbitan monooleate, sorbitan diolate, sorbitan trioleate, and the like, from the viewpoint of sufficiently hydrophobizing the steel sheet surface, preferably polyethylene glycol monooleate, glycerol monooleate, sorbitan monooleate, Sorbitan trioleate, more preferably polyethylene glycol monooleate, sorbitan monoole Over DOO, sorbitan trioleate, more preferably sorbitan monooleate, and sorbitan trioleate, from the viewpoint of expressing a draining properties even at low concentrations, even more preferably a sorbitan trioleate.

  The concentration of the component (c) in the rinse agent composition α is preferably 1 mg / kg or more, more preferably 3 mg / kg or more from the viewpoint of promoting the hydrophobization of the steel sheet, and the subsequent annealing process or plating process. From the viewpoint of avoiding an obstacle, 500 mg / kg or less is preferable, 300 mg / kg or less is more preferable, 200 mg / kg or less is more preferable, 100 mg / kg or less is still more preferable, 50 mg / kg or less is even more preferable, 30 mg / kg or less is more preferable, and 10 mg / kg or less is more preferable.

  The mass ratio of the component (b) and the component (c) is preferably 0.20 or more, more preferably 0.40 in terms of the component (b) / component (c) from the viewpoint of sufficiently hydrophobizing the steel sheet surface. More preferably, it is 0.80 or more, and preferably 9.0 or less, more preferably 4.5 or less, still more preferably 2.0 or less, and still more preferably 1.2 or less.

  The component (a), the mass ratio of the component (b) and the component (c) is [component (a) / [component (b) + component (c)] from the viewpoint of sufficiently hydrophobizing the steel sheet surface. ], Preferably 0.80 or more, more preferably 1.5 or more, still more preferably 1.6 or more, preferably 9.0 or less, more preferably 4.0 or less, still more preferably 3.2 or less. More preferably, it is 2.5 or less.

  The rinse agent composition α is an aqueous composition containing the component (a), the component (b), and the component (c), and water is used as the aqueous medium. As water, deionized water, ion-exchanged water, tap water, industrial water and the like can be preferably used.

（式中、Ｒ^６は炭素数６以上２２以下の直鎖又は分岐鎖のアルキル基又はアルケニル基、Ａ^２Ｏは炭素数２以上４以下のアルキレンオキシ基、ｅ、ｆ及びｇはそれぞれＡ^２Ｏの平均付加モル数を表す。ｎは重合数を示し、１以上３以下の数である。ｅ、ｆ、ｇ個のＡ^２Ｏはそれぞれ同一でも異なっていても良い。）で表されるアルキルグルコシドから選ばれる少なくとも１種と、下記一般式（４）：
Ｒ^７−Ｏ−（Ａ^３Ｏ）_ｈＨ （４）
（式中、Ｒ^７は炭素数１以上９以下の直鎖又は分岐鎖のアルキル基又はアルケニル基、Ａ^３Ｏは炭素数２以上４以下のアルキレンオキシ基、ｈは平均付加モル数を示し、１以上１００以下の数である。ｈ個のＡ^３Ｏはそれぞれ同一でも異なっていても良い。）で表されるポリオキシアルキレンアルキルエーテルから選ばれる少なくとも１種からなる群から選ばれる少なくとも１種である成分（ｄ）を含有するのが好ましい。 [Component (d)]
From the viewpoint of sufficiently hydrophobizing the steel sheet surface, the rinse agent composition α is further represented by the following general formula (3):

(Wherein R ⁶ is a linear or branched alkyl group or alkenyl group having 6 to 22 carbon atoms, A ² O is an alkyleneoxy group having 2 to 4 carbon atoms, and e, f, and g are each A ^2. This represents the average number of moles of O. n represents the number of polymerizations, and is a number of 1 to 3. e, f, and g of A ² O may be the same or different. At least one selected from alkyl glucosides and the following general formula (4):
R ⁷ —O— (A ³ O) _h H (4)
(In the formula, R ⁷ is a linear or branched alkyl group or alkenyl group having 1 to 9 carbon atoms, A ³ O is an alkyleneoxy group having 2 to 4 carbon atoms, h is the average number of moles added, And at least one selected from the group consisting of at least one selected from polyoxyalkylene alkyl ethers represented by h) A ³ O may be the same or different. It is preferable to contain the component (d) which is.

[Alkylglucoside represented by general formula (3)]
In the general formula (3), R ⁶ has a carbon number of preferably 6 or more, more preferably 8 or more, still more preferably 10 or more, from the viewpoint of sufficiently hydrophobizing the steel sheet surface. More preferably, it is 12 or more, and preferably 22 or less, more preferably 16 or less, and further preferably 14 or less, and a linear or branched alkyl group from the viewpoint of blending stability of the concentrate. Or an alkenyl group is preferable. Examples of R ⁶ include hexyl group, octyl group, 2-ethylhexyl group, decyl group, lauryl (dodecyl) group, tridecyl group, myristyl (tetradecyl) group, palmityl (hexadecyl) group, stearyl (octadecyl) group, and behenyl. Group, oleyl group, etc., from the viewpoint of sufficiently hydrophobizing the steel sheet surface, octyl group, 2-ethylhexyl group, decyl group, lauryl (dodecyl) group, tridecyl group, myristyl (tetradecyl) group, palmityl (hexadecyl) Groups are more preferred.

In the general formula (3), A ² O is the same or different and represents an alkyleneoxy group having 2 or more and 4 or less, such as an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group. In the general formula (3), A ² O is preferably an ethyleneoxy group or a propyleneoxy group, more preferably an ethyleneoxy group, from the viewpoint of the blending stability of the concentrate.

In the general formula (3), e, f, and g represent the average number of moles of A ² O added, and are each 0 or more and 5 or less, preferably 0 or more and 3 or less, more preferably 0 or more and 2 or less. is there. Each of e, f, and g of A ² O may be the same or different.

  In the general formula (3), n represents a polymerization number, and from the viewpoint of sufficiently hydrophobizing the steel sheet surface, it is preferably 1 or more, more preferably 1.1 or more, and preferably 3 or less, more preferably 2. 5 or less, more preferably 2 or less.

[Polyoxyalkylene alkyl ether represented by the general formula (4)]
In the general formula (4), A ³ O means an alkyleneoxy group having 2 to 4 carbon atoms, such as an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group. Of these, an ethyleneoxy group is preferred. There may be a plurality of types of A ³ O. In that case, block bonds, random bonds, alternating bonds, etc. can be used, block bonds and / or random bonds are preferred, and random bonds are more preferred.

In the general formula (4), R ⁷ is a linear or branched alkyl group or alkenyl group having 1 or more carbon atoms, preferably 3 or more, more preferably 6 or more, and 9 or less, preferably 8 or less. . As the alkyl group, for example, a hexyl group, an octyl group, and a 2-ethylhexyl group are more preferable. In the general formula (4), h represents an average added mole number and is 2 or more, preferably 4 or more, and 30 or less, preferably 20 or less, more preferably 10 or less, and still more preferably 8 or less.

  Specifically, the polyoxyalkylene alkyl ether represented by the general formula (4) includes one or more selected from the following.

C _j2 H _{2j2 + 1} −O (EO) _p2 H
C _j2 H _{2j2 + 1} -O (EO) _q2 (PO) _r2 H (however, EO and PO are added as a block)
C _j2 H _{2j2 + 1} -O (PO) _r2 (EO) _q2 H (however, EO and PO are added as a block)
C _j2 H _{2j2 + 1} -O (EO) _s2 (PO) _t2 (EO) _u2 H (however, EO and PO are added as a block)
C _j2 H _{2j2 + 1} -O (EO) _q2 (PO) _r2 H (however, EO and PO are randomly added)

In the formula in the previous paragraph, EO is an ethyleneoxy group (C ₂ H ₄ O), PO is a propyleneoxy group (C ₃ H ₆ O), j2 is an integer of 1 to 9, and p2, q2, r2, s2, t2 , U2 is the average number of moles added, p2 is a number from 3 to 40, q2 is a number from 1 to 40, r2 is a number from 1 to 40, s2 is a number from 1 to 30 and t2 is A number from 1 to 30; u2 is a number from 1 to 30; q2 + r2 is a number from 3 to 100; and s2 + t2 + u2 is a number from 3 to 100.

More preferably, 1 or more things chosen from the following are mentioned.
_{C 4 H 9 O (EO)} 4 H, C 6 H 13 O (EO) 4 H, C 8 H 17 O (EO) 4 H, C 8 H 17 O (EO) 2 H, C 8 H 17 O ( EO) ₆ H, C ₈ H ₁₇ O (EO) ₈ H, C ₈ H ₁₇ O (EO) ₁₁ H, C ₈ H ₁₇ O (EO) ₂₀ H, C ₈ H ₁₇ O (EO) ₃₀ H.

  Note that (EO) and (PO) indicate that blocks are added in this order unless otherwise specified.

  The concentration of the component (d) in the rinse agent composition α is preferably 3.5 mg / kg or more, more preferably 3.7 mg / kg or more from the viewpoint of the blending stability of the concentrated solution, and the repellency of the steel sheet surface. 200 mg / kg or less is preferable from the viewpoint of hydration, 150 mg / kg or less is more preferable, and 35 mg / kg or less is more preferable from the viewpoint of blending stability.

  The rinse agent composition α may further contain an antifoaming agent, a chelating agent, a preservative, and the like as long as the effect of the present embodiment is obtained. The rinse agent composition α has a pH of preferably 3 or more, more preferably 5 or more, still more preferably 6 or more, and preferably 10 or less, preferably 9 or less, from the viewpoint of water repellency on the surface of the steel strip. More preferred.

<Manufacturing method of steel plate>
The said rinse agent composition (alpha) can be used for manufacture of a steel plate. The manufacturing method of the steel plate using the rinse agent composition α includes a cleaning step (1) for cleaning the steel plate after cold rolling, and a rinsing step (2) for the steel plate after the cleaning step (1) has been performed. A method of manufacturing a steel sheet including a drying step (3) for drying the steel plate after the rinsing step (2) is performed, wherein the rinsing step (2) includes one or more rinsing processes, and the last rinsing The rinse agent composition α is used for the treatment.

[Washing step (1) for washing the steel sheet after cold rolling]
In the cleaning step (1), dirt such as rolling oil adhering to the steel sheet is cleaned with a cleaning agent in accordance with conventional conditions. The steel plate may be any metal, but it is preferable to target iron from the viewpoint of promoting drying and preventing rust. As the cleaning agent, for example, alkaline cleaning agents as described in JP-A-10-280179 and JP-A-10-324900 can be used.

  As the alkaline detergent, an aqueous solution containing an alkaline agent is used. Any alkaline agent can be used as long as it is a water-soluble alkaline agent in order to ensure the removal of oil stains. Specific examples of alkali agents include hydroxides of alkali metals such as sodium hydroxide and potassium hydroxide, silicates such as sodium orthosilicate, sodium metasilicate and sodium sesquisilicate, phosphates such as trisodium phosphate, Examples thereof include carbonates such as disodium carbonate, sodium hydrogencarbonate and dipotassium carbonate, and borate salts such as sodium borate. Two or more water-soluble alkaline agents may be combined. The content of the alkaline agent is preferably 0.1% by mass or more, more preferably 1% by mass or more, and preferably 10% by mass or less, more preferably 5% by mass or less in the alkaline detergent.

  In addition to alkaline agents, alkaline detergents include nonionic surfactants such as polyoxyalkylene alkyl ethers; chelate iron ions etc. by acting on dirt such as iron soap, and easily dissolve the dirt as fatty acid soap Thus, an aliphatic carboxylic acid or a salt thereof can be added from the viewpoint of ensuring stability during storage and stability of effects after storage. In addition, any additive can be added to the alkaline detergent, for example, a commonly used additive such as an organic builder that improves the washability is formulated in consideration of an increase in cost. can do. Although the ratio of components other than the alkali agent in the alkali detergent is appropriately determined, it is preferably 1 part by mass or less, more preferably 0.5 part by mass or less with respect to 1 part by mass of the alkali agent. Moreover, as for the alkali detergent, the ratio of the non volatile matter containing components other than an alkali agent and an alkali agent has preferable 1 mass% or more and 10 mass% or less.

  Examples of the cleaning step (1) include immersion cleaning, spray cleaning, brush cleaning, and electrolytic cleaning. Electrolytic cleaning is a cleaning method in which the steel sheet is made positive (or negative) in the cleaning liquid and a direct current is passed through it. Oxygen (or hydrogen) bubbles generated from the steel sheet by the current are used, and oil stains attached to the steel sheet by physical force. It is a process of removing solid dirt such as iron powder. Moreover, the acid cleaning which removes the oxide film produced | generated on the steel plate surface with an acid cleaning agent may be used.

[Rinsing step after washing step (1) (2)]
In the rinsing step (2), the steel plate after the washing step (1) is rinsed with water or a rinsing agent to remove the cleaning agent and remaining rolling oil. From the viewpoint of improving the drying property of the steel sheet, the rinse agent composition α is used for the final rinsing process in the rinsing step (2).

  In the rinsing step (2), the rinsing agent composition α is preferably 50 ° C. or lower, more preferably 40 ° C. or lower, and further preferably 35 ° C. in order to reduce the energy cost required to raise the temperature of the rinsing agent. Hereinafter, it is more preferably used at 30 ° C. or lower. There is no particular lower limit, but it is usually 5 ° C or higher.

  In the rinsing step (2), one or more rinsing treatments can be included, but the rinse agent composition α is brought into contact with the steel sheet in the final rinsing treatment before reaching the drying step, and the cleaning step (1) is performed. The applied steel sheet is processed. When two or more rinsing processes are included, the rinsing process (2) can be rinsed with a rinsing agent or water other than the rinsing agent composition α, but in the final rinsing process of the rinsing process (2), It is preferable to use the rinse agent composition α.

  As a specific example of the rinsing agent treatment using the rinsing agent composition α performed in the final rinsing process of the rinsing step (2), the steel sheet is rinsed with a brush to rinse the steel sheet, and the spray is not brushed. The above-mentioned spray rinsing treatment for rinsing the steel sheet, and the rinsing rinsing treatment for rinsing the steel sheet. Among these, from the viewpoint of allowing the rinse agent composition α to efficiently act on the steel sheet, immersion rinse treatment and / or spray rinse treatment is preferable, and the rinse agent composition α can be directly and efficiently acted on the steel sheet. The spray rinse treatment is more preferable. Moreover, the rinse agent composition (alpha) sprayed with the rinse agent composition (alpha), the rinse agent composition (alpha) distilled from the steel plate surface after spray treatment can be introduce | transduced into an immersion tank, and can be reused.

  In the brush rinsing treatment, the rinse agent composition α is brought into contact with the steel sheet by spraying the rinse agent composition α on the steel sheet and the brush roll while conveying the steel sheet between the brush rolls or between the brush roll and the transport roll. . The rotation speed of the brush roll is preferably 100 revolutions / minute or more, more preferably 500 revolutions / minute or more, and preferably 1200 revolutions / minute or less, more preferably 1000 revolutions / minute or less.

In the spray rinsing treatment, the rinse agent composition α is directly sprayed on the steel sheet, and the rinse agent composition α is brought into contact with the steel sheet. The spraying conditions are preferably a spray pressure of 0.01 MPa or more, more preferably 0.05 MPa or more, further preferably 0.1 MPa or more, more preferably 3 MPa or less, more preferably 2 MPa or less, and further preferably 1.5 MPa or less. Preferably, 1 MPa or less is still more preferable. Spray volume is preferably 0.01 m ³ / time or more, more preferably at least 0.05 m ³ / time, 0.1 m ³ / time or more, and then, preferably 100 m ³ / time or less, 50 m ³ / time or less Is more preferably 10 m ³ / hour or less. The spray time (contact time in the spray rinse treatment) is preferably 0.01 seconds or more, more preferably 0.1 seconds or more, still more preferably 1 second or more, and preferably 30 seconds or less, more preferably 10 seconds or less.

  In the immersion rinse treatment, the immersion time in the rinse agent composition α is preferably 1 second or more and 5 seconds or less, and when showering, the spray pressure is 0.05 MPa or more and 1.5 MPa or less, and 0.1 seconds or more and 5 seconds. The following is preferred.

  In the case where two or more rinse treatments are included in the rinsing step (2), when the steel sheet is treated with a rinse agent other than water or the rinse agent composition α, the brush rinse is performed with a rinse agent other than water or the rinse agent composition α. A method of treating and rinsing with a rinse agent composition α and a method of immersing and rinsing with a rinse agent other than water or the rinse agent composition α and spray rinsing with the rinse agent composition α are preferred. From the viewpoint of reducing the drying load of the steel sheet, it is more preferable to treat with a rinse agent composition α after treating with water. Specifically, a method of performing a brush rinse treatment with water and an immersion rinse treatment with the rinse agent composition α and a method of performing an immersion rinse treatment with water and a spray rinse treatment with the rinse agent composition α are more preferable.

  Further, for example, when treating with a rinse agent other than water or the rinse agent composition α, the temperature of the water used is preferably 5 ° C. or higher, more preferably 10 ° C. or higher, and preferably, in order to reduce energy costs. Is 40 ° C. or lower, more preferably 35 ° C. or lower, and still more preferably 30 ° C. or lower. As a method of treating with water, the steel plate may be immersed in water or a rinse agent, and may be rinsed with a shower or the like.

  In the brush rinsing treatment, water or a rinse agent is brought into contact with the steel sheet by spraying the steel sheet and the brush roll while conveying the steel sheet between the brush rolls or between the brush roll and the transport roll. The rotation speed of the brush roll is preferably 100 revolutions / minute or more, more preferably 500 revolutions / minute or more, and preferably 1200 revolutions / minute or less, more preferably 1000 revolutions / minute or less.

In the spray rinsing process, water or a rinse agent is directly sprayed on the steel sheet, and the steel sheet is brought into contact with water or a rinse agent. The spraying conditions are preferably a spray pressure of 0.01 MPa or more, more preferably 0.05 MPa or more, further preferably 0.1 MPa or more, more preferably 3 MPa or less, more preferably 2 MPa or less, and further preferably 1.5 MPa or less. Preferably, 1 MPa or less is still more preferable. Spray volume is preferably 0.01 m ³ / time or more, more preferably at least 0.05 m ³ / time, 0.1 m ³ / time or more, and then, preferably 100 m ³ / time or less, 50 m ³ / time or less Is more preferably 10 m ³ / hour or less. The spray time (contact time in the spray rinse treatment) is preferably 0.01 seconds or more, more preferably 0.1 seconds or more, still more preferably 1 second or more, and preferably 30 seconds or less, more preferably 10 seconds or less.

  In the rinsing step (2), when the steel sheet is immersed in water or a rinse agent, the immersion time of the steel sheet in water or rinse agent is preferably 0.5 seconds or more, more preferably 1 second or more, and 10 Seconds or less are preferable, and 5 seconds or less are more preferable.

  The said washing | cleaning process (1) and the rinse process (2) are normally provided as a continuous line which conveys a steel plate. The conveying speed of the steel plate is usually 30 m / min or more, and from the viewpoint of productivity of the steel plate, it is preferably 50 m / min or more, more preferably 100 m / min or more, still more preferably 300 m / min or more, and 1000 m / min. The processing time in the washing step (1) and the rinsing step (2) is set in consideration of the conveyance line speed.

  Furthermore, from the viewpoint of reducing the load in the drying step (3), the rinse agent treatment using the rinse agent composition α was performed between the rinse agent treatment using the rinse agent composition α and the drying step (3). It is preferable to perform a process of holding the surface of the steel plate substantially perpendicular to the ground. By this treatment, the amount of water remaining on the surface of the steel sheet is reduced because the water on the surface of the steel sheet to which water repellency is imparted with the rinse agent composition α falls due to gravity. From the viewpoint of reducing the moisture content on the surface of the steel sheet, the time for maintaining the substantially vertical is preferably 1 second or longer, more preferably 3 seconds or longer, and 30 seconds or shorter, preferably 20 seconds or shorter from the viewpoint of transporting the steel sheet. Is more preferable.

[Drying step (3) for drying the steel sheet after the rinsing step (2) is performed]
In the drying step (3), the rinsing step (2) is performed, and the steel sheet to which the rinse agent composition α is attached is dried. In the drying step (3), the steel sheet to which the rinsing agent composition α is adhered is dried in accordance with conventional conditions. From the viewpoint of reducing energy in a drying means at a high temperature such as an oven, after the rinsing agent treatment using the rinsing agent composition α, a gas such as air is sprayed onto the steel sheet surface at the beginning of the drying step (3). It is preferable to perform a process of blowing off moisture on the steel plate. As a drying means in the drying step, for example, a method of putting in an oven at 80 ° C. or higher and 150 ° C. or lower, preferably 120 ° C. or lower is given. Moreover, the method of injecting gas, such as air adjusted to these temperatures, to the steel plate surface is mentioned. For example, the drying time is preferably 60 seconds or less, more preferably 40 seconds or less, and even more preferably 20 seconds or less from the viewpoint of reducing the number of heaters in a continuous line that conveys the steel sheet and reducing the energy cost. In a production facility of a steel sheet factory, a method of heating at 80 ° C. or higher and 150 ° C. or lower, preferably 120 ° C. or lower, for 3 to 10 seconds and drying is exemplified.

  The steel plate obtained after washing can be used in various applications such as automotive steel plates, steel plates for beverages such as canned foods, and steel plates for home appliances.

（式中、Ｒ^１は炭素数６以上２２以下の炭化水素基を示し、Ｒ^２は水素原子又は炭素数１以上２２以下の炭化水素基、Ｒ^３及びＲ^４は、同一又は異なって、水素原子又は炭素数１以上３以下の炭化水素基を示す。Ｘ^―は無機アニオンあるいは有機アニオンを示す。）で表される化合物から選ばれる少なくとも１種である成分（ａ）と、下記一般式（２）：
Ｒ^５−Ｏ−（Ａ^１Ｏ）_ｍＨ （２）
（式中、Ｒ^５は炭素数１０以上２０以下の直鎖又は分岐鎖のアルキル基又はアルケニル基、Ａ^１Ｏは炭素数２以上４以下のアルキレンオキシ基、ｍは平均付加モル数を示し、１以上１００以下の数である。ｍ個のＡ^１Ｏはそれぞれ同一でも異なっていても良い。）で表される化合物から選ばれる少なくとも１種である成分（ｂ）と、炭素数１２以上２２以下の脂肪酸と水酸基数が２以上６以下の多価アルコールとのエステルから選ばれる少なくとも１種である成分（ｃ）とを含有する、鋼板用リンス剤組成物。 This specification discloses the following compositions and manufacturing methods further regarding embodiment mentioned above.
<1> The following general formula (1):

(Wherein R ¹ represents a hydrocarbon group having 6 to 22 carbon atoms, R ² represents a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, R ³ and R ⁴ are the same or different, .X indicating the atom or having 1 or more carbon atoms of 3 or less hydrocarbon groups ^-. the component (a) is at least one selected from compounds represented by) indicating an inorganic anion or an organic anion, the following general formula ( 2):
R ⁵ —O— (A ¹ O) _m H (2)
(In the formula, R ⁵ is a linear or branched alkyl group or alkenyl group having 10 to 20 carbon atoms, A ¹ O is an alkyleneoxy group having 2 to 4 carbon atoms, m represents the average number of moles added, The number of m A ¹ Os may be the same or different, and at least one component (b) selected from the compounds represented by: The rinse agent composition for steel plates containing the following fatty acid and the component (c) which is an at least 1 sort (s) chosen from ester with the polyhydric alcohol whose hydroxyl number is 2-6.

<2> R ¹ has 6 or more carbon atoms, preferably 8 or more, more preferably 12 or more, still more preferably 16 or more, and 22 or less, preferably 18 or less, The rinse agent composition for steel sheet according to <1>, which is a branched alkyl group or alkenyl group.
<3> R ¹ is hexyl, octyl, 2-ethylhexyl, decyl, lauryl (dodecyl), tridecyl, myristyl (tetradecyl), palmityl (hexadecyl), stearyl (octadecyl), behenyl Group, oleyl group is preferable, hexyl group, octyl group, lauryl (dodecyl) group, tridecyl group, myristyl (tetradecyl) group, palmityl (hexadecyl) group, stearyl (octadecyl) group, behenyl group, oleyl group are more preferable, palmityl The rinsing agent composition for steel sheet according to <1> or <2>, wherein (hexadecyl) group, stearyl (octadecyl) group, behenyl group, and oleyl group are more preferable.
<4> The R ² is a hydrogen atom or 1 or more carbon atoms, preferably 6 or more, more preferably 8 or more, still more preferably 12 or more, still more preferably 16 or more, and 22 or less, preferably 18 The rinsing agent for steel sheet according to any one of <1> to <3>, which is preferably a linear or branched alkyl group or alkenyl group, more preferably a linear alkyl group or alkenyl group. Composition.
<5> R ² is a hydrogen atom, methyl group, ethyl group, isopropyl group, hexyl group, octyl group, 2-ethylhexyl group, decyl group, lauryl (dodecyl) group, tridecyl group, myristyl (tetradecyl) group, palmityl (Hexadecyl) group, stearyl (octadecyl) group, behenyl group, oleyl group are preferable, and a hydrogen atom is more preferable, The rinse agent composition for steel plates in any one of said <1>-<4>.
<6> R ³ and R ⁴ are the same or different and are preferably a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms such as a methyl group, an ethyl group, and an isopropyl group, and more preferably a hydrogen atom. The rinse agent composition for steel plates in any one of 1>-<5>.
<7> X ⁻ represents a halide ion such as a chloride ion or a bromide ion, an organic anion obtained by removing a proton from an organic acid such as acetic acid, lactic acid or citric acid, an alkyl sulfate ion having 1 to 5 carbon atoms (CH ₃ SO ₄ ⁻ , C ₂ H ₅ SO ₄ ⁻ , C ₃ H ₇ SO ₄ ^— etc.), alkyl carbonate ions (CH ₃ CO ₃ ⁻ ), alkyl phosphate ions are preferred, and halides such as chloride ions and bromide ions ions and CH ₃ CO ₃ ^- organic anions are more preferred, such as, organic anions are more preferred, the <1> to steel rinse composition according to any one of <6>.
<8> The component (a) is an acid neutralized monoalkylamine having 6 to 22 carbon atoms, an acid neutralized monoalkylmethylamine having 6 to 22 carbon atoms, and 6 or more carbon atoms. An acid neutralized product of monoalkyl dimethylamine having 22 or less, an acid neutralized product of dialkylmethylamine having 1 to 22 carbon atoms, an acid neutralized product of dialkyldimethylamine having 1 to 22 carbon atoms, The rinsing agent composition for steel sheet according to any one of <1> to <7>, wherein 6 to 22 alkyltrimethylammonium and dialkylammonium having 1 to 22 carbon atoms are preferable.
<9> The component (a) is laurylamine hydrochloride, stearylamine hydrochloride, oleylamine hydrochloride, hexylamine acetate, behenylamine acetate, laurylamine acetate, myristylamine acetate , Palmitylamine acetate, stearylamine acetate, oleylamine acetate, dioctylamine hydrochloride, lauryltrimethylammonium bromide, stearyltrimethylammonium chloride, oleyltrimethylammonium chloride, lauryltrimethylammonium chloride, myristyltrimethylammonium chloride, Palmityl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, dioctyl dimethyl ammonium Preference is given to um chloride, dilauryl dimethyl ammonium chloride, dimyristyl dimethyl ammonium chloride, distearyl dimethyl ammonium chloride, dioleyl dimethyl ammonium chloride, hexylamine acetate, octylamine acetate, laurylamine acetate, hexadecylamine Acetate, oleylamine acetate, stearylamine acetate, behenylamine acetate, hexylamine hydrochloride, octylamine hydrochloride, laurylamine hydrochloride, hexadecylamine hydrochloride, oleylamine hydrochloride Stearylamine hydrochloride and behenylamine hydrochloride are more preferable, hexadecylamine hydrochloride, oleylamine hydrochloride and oleylamine acetate are more preferable, <1> to < Steel rinse composition according to any one of>.
The concentration of the <10> component (a) in the rinsing agent composition for steel sheet is preferably 5 mg / kg or more, more preferably 10 mg / kg or more, still more preferably 12 mg / kg or more, and preferably 1000 mg / kg or less. 800 mg / kg or less, more preferably 500 mg / kg or less, still more preferably 300 mg / kg or less, even more preferably 150 mg / kg or less, still more preferably 100 mg / kg or less, and more preferably 70 mg / kg or less. More preferably, the rinse agent composition for steel sheet according to any one of <1> to <9>.
<11> The above <1> to <1>, wherein R ⁵ is a linear or branched alkyl group or alkenyl group having 10 or more carbon atoms, preferably 12 or more, and 20 or less, preferably 18 or less. 10> The rinse agent composition for steel plates according to any one of the above.
<12> The alkyl group is preferably a decyl group, a sec-decyl group, a lauryl (dodecyl) group, a sec-lauryl group, a myristyl group, a cetyl group, a palmityl group, or a stearyl group, and a decyl group, a lauryl group, a myristyl group, The rinse agent composition for steel sheet according to any one of <1> to <11>, wherein a palmityl group and a stearyl group are more preferable, and a myristyl group, a palmityl group, and a stearyl group are further preferable.
<13> The m is 1 or more, preferably 3 or more, more preferably 10 or more, and 100 or less, preferably 50 or less, more preferably 40 or less, still more preferably 35 or less, still more preferably 30 or less. The rinsing agent composition for steel sheet according to any one of <1> to <12>.
<14> The concentration of the component (b) in the rinse agent composition for steel sheet is preferably 1 mg / kg or more, more preferably 3 mg / kg or more, and preferably 500 mg / kg or less, more preferably 300 mg / kg or less. Preferably, 200 mg / kg or less is further preferred, 100 mg / kg or less is more preferred, 80 mg / kg or less is more preferred, and 50 mg / kg or less is still more preferred. Any one of <1> to <13> A rinsing agent composition for steel sheets.
<15> The mass ratio ((a) / (b)) between the component (a) and the component (b) is preferably 0.1 or more, more preferably 0.5 or more, and even more preferably 1.0 or more. 2.0 or more is still more preferable, 15 or less is preferable, 10 or less is more preferable, and 7.0 or less is still more preferable, The rinse agent composition for steel plates in any one of said <1>-<14> object.
<16> The fatty acid constituting the component (c) has 12 to 22 carbon atoms, preferably 14 or more, more preferably 16 or more, and preferably 20 or less. <15> The rinse agent composition for steel sheets according to any one of the above.
<17> Fatty acids constituting the component (c) are preferably lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, behenic acid, oleic acid, etc., and myristic acid, palmitic acid, stearic acid, oleic acid are preferred. More preferably, stearic acid and oleic acid are still more preferable, The rinse agent composition for steel plates in any one of said <1>-<16>.
<18> The polyhydric alcohol constituting the component (c) has 2 to 6 hydroxyl groups, preferably 3 or more, more preferably 4 or more, and preferably 5 or less <1> ~ Rinsing agent composition for steel sheet according to any one of <17>.
<19> The polyhydric alcohol is preferably a polyalkylene glycol, glycerin, pentaerythritol, sorbitan, or sorbitol, more preferably a polyalkylene glycol, glycerin, or sorbitan, and even more preferably sorbitan, the steel sheet rinse according to the above <18> Agent composition.
<20> The rinse agent composition for steel sheet according to <19>, wherein the number of carbon atoms of the alkylene glycol of the polyalkylene glycol is preferably 2 or more, and preferably 4 or less, more preferably 3 or less. .
<21> The average polymerization degree of the alkylene glycol of the polyalkylene glycol is 1 or more, preferably 6 or more, and preferably 50 or less, more preferably 20 or less, still more preferably 15 or less, The rinse agent composition for steel plates as described in <19> or <20>.
<22> The number of ester groups in the component (c) is 1 or more, preferably 5 or less, more preferably 3 or less, for the steel sheet according to any one of <1> to <21>. Rinse agent composition.
<23> The esterification rate of the hydroxyl group of the ester of the fatty acid and polyhydric alcohol of the component (c) is [number of ester groups / number of hydroxyl groups of polyhydric alcohol] in the ester compound, preferably 0.16. The rinsing agent composition for steel sheet according to any one of <1> to <22>, more preferably 0.20 or more, still more preferably 0.25 or more, and preferably 0.8 or less.
<24> The ester is polyethylene glycol monolaurate, polyethylene glycol monomyristate, polyethylene glycol monostearate, polyethylene glycol monooleate, polypropylene glycol monooleate, polybutylene glycol monooleate, glycerol monooleate, glyceroldiolate, Bentaerythritol monooleate, sorbitan monostearate, sorbitan monooleate, sorbitan diolate, sorbitan trioleate are preferred, polyethylene glycol monooleate, glycerol monooleate, sorbitan monooleate, sorbitan trioleate are more preferred, polyethylene glycol monooleate, sorbitan Monooleate and sorbitan trioleate are more preferred Sorbitan monooleate, more preferably more sorbitan trioleate, sorbitan trioleate and further preferably more, the <1> to steel rinse composition according to any one of <23>.
<25> The concentration of the component (c) in the rinsing agent composition for steel sheet is preferably 1 mg / kg or more, more preferably 3 mg / kg or more, preferably 500 mg / kg or less, more preferably 300 mg / kg or less, 200 mg / kg or less is more preferred, 100 mg / kg or less is more preferred, 50 mg / kg or less is more preferred, 30 mg / kg or less is still more preferred, 10 mg / kg or less is more preferred, <1> to <24> The rinse agent composition for steel plates according to any one of the above.
<26> The mass ratio of the component (b) to the component (c) (component (b) / component (c)) is preferably 0.20 or more, more preferably 0.40 or more, and still more preferably 0.80. Any of the above <1> to <25>, preferably 9.0 or less, more preferably 4.5 or less, still more preferably 2.0 or less, and still more preferably 1.2 or less. A rinse agent composition for steel sheets according to claim 1.
<27> The mass ratio ([component (a) / [component (b) + component (c)]]) of the component (a), the component (b) and the component (c) is preferably 0.00. 80 or more, more preferably 1.5 or more, still more preferably 1.6 or more, preferably 9.0 or less, more preferably 4.0 or less, still more preferably 3.2 or less, and even more preferably 2. The rinse agent composition for steel plates according to any one of <1> to <26>, which is 5 or less.
<28> Furthermore, the general formula (3) (wherein R ⁶ is a linear or branched alkyl group or alkenyl group having 6 to 22 carbon atoms, and A ² O is alkyleneoxy having 2 to 4 carbon atoms) Groups, e, f and g each represent the average number of moles added of A ² O. n represents the number of polymerizations and is a number from 1 to 3. Each of e, f and g A ² O may be the same. And at least one selected from alkyl glucosides represented by general formula (4) (wherein R ⁷ is a linear or branched alkyl group having 1 to 9 carbon atoms, or An alkenyl group, A ³ O is an alkyleneoxy group having 2 to 4 carbon atoms, h is an average added mole number, and is a number from 1 to 100. The h A ³ Os may be the same or different. Polyoxyalkylene alkyl ester represented by Preferably contains the component (d) is at least one selected from the group consisting of at least one selected from ether, the <1> to steel rinse composition according to any one of <27>.
<29> The R ⁶ preferably has 6 or more carbon atoms, more preferably 8 or more, still more preferably 10 or more, still more preferably 12 or more, and preferably 22 or less. A rinsing agent for steel sheet according to any one of <1> to <28>, wherein a linear or branched alkyl group or alkenyl group is preferred, more preferably 16 or less, and still more preferably 14 or less. Composition.
<30> The A ² O may be the same or different, and is preferably an alkyleneoxy group having 2 or more and 4 or less, such as an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group, more preferably an ethyleneoxy group or a propyleneoxy group, The rinse agent composition for steel sheets according to any one of <1> to <29>, wherein an oxy group is more preferable.
<31> The A ³ O is preferably an alkyleneoxy group having 2 to 4 carbon atoms such as an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group, and more preferably an ethyleneoxy group or a propyleneoxy group. ~ Rinsing agent composition for steel sheet according to any one of <30>.
<32> The R ⁷ is preferably a linear or branched alkyl group or alkenyl group having 1 or more carbon atoms, preferably 3 or more, more preferably 6 or more, preferably 9 or less, more preferably 8 or less. >-<31> The rinse agent composition for steel plates in any one of.
<33> The concentration of the component (d) in the rinse agent composition α is preferably 3.5 mg / kg or more, more preferably 3.7 mg / kg or more, preferably 200 mg / kg or less, more preferably 150 mg / kg or less. The rinse agent composition for steel sheet according to any one of <1> to <32>, preferably 35 mg / kg or less.
<34> After washing step (1) for washing the steel sheet after cold rolling, rinsing step (2) for the steel plate after the washing step (1), and after the rinsing step (2) A method for producing a steel plate including a drying step (3) for drying the steel plate, wherein the rinsing step (2) includes one or more rinsing processes, and the last rinsing process is any one of <1> to <33> The manufacturing method of a steel plate using the rinse agent composition for steel strips described in 1.
<35> The method for producing a steel sheet according to <34>, wherein the last rinsing process in the rinsing step (2) is preferably an immersion rinse process and / or a spray rinse process, and more preferably a spray rinse process.
<36> The washing step (1) and the rinsing step (2) are provided as a continuous line for conveying a steel plate, and the conveyance speed of the steel plate is preferably 30 m / min or more, more preferably 50 m / min or more, and further Preferably, it is 100 m / min or more, More preferably, it is 300 m / min or more, Preferably it is 1000 m / min or less, More preferably, it is 800 m / min or less, The manufacturing method of the steel plate as described in <34> or <35>.
<37> Use of the composition according to any one of <1> to <33> in the production of a steel plate.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited at all by these Examples.

[Examples A-1 to A-68, B-1 to B-13, Comparative Examples A-1 to A-11, B-1 to B-4]
(Preparation of detergent)
Sodium hydroxide 2% by mass, sodium gluconate 0.16% by mass, ethylenediaminetetraacetate 0.05% by mass, polyoxyethylene dodecyl ether 0.1% by mass, sodium polyacrylate 0.05% by mass, water 97. An aqueous solution in which 64% by mass was added and mixed was used as the cleaning agent A.

[Preparation of rinse agent composition]
The total amount of each component of oleylamine and acetic acid as component (a) by heating water to 60 ° C., nonionic surfactant as component (b) and component (c) shown in Tables 1-6 is 18 The concentrated solution was adjusted by adding an amount of mass% and mixing until oleylamine was dissolved. In the test, it was used after diluting (4500 times) to the concentration shown in the table.

C ₁₈ H ₃₇ O (EO) ₁₂ (PO) ₂₁ H (random) in Tables 1 to 12 is a compound (HLB1.9) obtained by randomly adding 12 mol of ethylene oxide and 21 mol of propylene oxide to 1 mol of stearyl alcohol. In the general formula (2), R ⁵ is a linear alkyl group having 18 carbon atoms, A ¹ O is an ethyleneoxy group and a propyleneoxy group, and m is 33. C ₁₈ H ₃₇ O (EO) ₈ (PO) ₆ H (random) in Table 1 is a compound in which 8 mol of ethylene oxide and 6 mol of propylene oxide are randomly added to 1 mol of stearyl alcohol. ), R ⁵ is a linear alkyl group having 18 carbon atoms, A ¹ O is an ethyleneoxy group and a propyleneoxy group, and m is 14. In Tables 1 to 12, (EOx) [where x is a number] is a compound having an average addition mole number of ethylene oxide x, (Cy) [where y is a number] is an alkyl group having y carbon atoms, (Cy-z (Where y and z are numbers) represents a mixture of alkyl groups having from y to z carbon atoms.

[Evaluation of drainability]
<Washing process: alkali cleaning>
Cold rolled steel sheet (dirt: iron powder and rolling oil) with a thickness of 70 mm cut to a length of 70 mm and a width of 100 mm is immersed in the cleaning agent A in the alkali cleaning tank (immersion time 2 seconds), and the alkali cleaning tank Pulled up from.

<Washing process: Electrolytic cleaning>
The steel plate subjected to the alkali cleaning step is immersed in the cleaning agent A in an electrolytic cleaning tank, and subjected to electrolytic cleaning (electrolytic time 1 second, switching interval between negative electrode and positive electrode 0.5 seconds each, current density 10 A / dm ^2. ) And pulled up from the electrolytic cleaning tank.

<Washing process: Brush cleaning>
While spraying water (25 ° C.) at a spray pressure of 0.2 MPa and a spray amount of 5 L / min, using a nozzle (spray nozzle 1/4 MVE11578 manufactured by Ikeuchi Co., Ltd.) Brush cleaning was performed with a brush roll cleaning tester (manufactured by Showa Kogyo Co., Ltd., nylon brush, brush rotation speed 600 rpm, brush rolling 2.5 mm, steel plate feed rate 100 m / min).

<Rinse process: spray rinse treatment>
Rinsing agent compositions shown in Tables 1 to 12 at a spray pressure of 0.2 MPa and a spray rate of 5 L / min, using a nozzle (spray nozzle 1 / 4MJ100NBW manufactured by Ikeuchi Co., Ltd.) after the brush cleaning process. The product (25 ° C.) was sprayed onto the steel plate. And it hold | maintained for 5 second so that the surface of the steel plate which processed the rinse agent might become perpendicular | vertical with respect to the ground. Examples B-1 to B-3 and Comparative Example B-1 have a steel plate feed rate of 100 m / min, and Examples B-4 to B-6 and Comparative Example B-2 have a steel plate feed rate of 500 m / min. The feeding rate of the steel sheet was 60 m / min, except for the above.

<Drying process>
The steel plate after the rinsing step was dried using an EDM dryer manufactured by Wingo Seiki Co., Ltd. The drying operation was performed for about 15 seconds at a position about 10 cm away from the nozzle with the dryer switch set to the HEAT side, and moisture was removed so that water droplets on the surface of the steel plate disappeared visually. In the production of a steel plate, usually, the steel plate is further heated and then dried.

<Measurement of amount of attached water>
Immediately after the rinsing step, the mass of the steel sheet and the mass of the steel strip after air blowing were measured. The difference, that is, the amount of attached water was calculated by the following formula, and the amount of attached water per unit area (g / m ² ) was obtained.
[Amount of adhered water (g)] = [Mass of steel strip after rinsing step (g)] − [Mass of dry steel strip after air blowing (g)]

<Evaluation of compounding stability>
After blending the concentrated solution, the turbidity of the solution was visually evaluated according to the following criteria. The clearer the liquid, the better the compounding stability.
A: Transparent immediately after blending and after one week at room temperature B: Transparent immediately after blending, but turbid after one week at room temperature C: Turbid immediately after blending

  The results are shown in Tables 1-12. In addition, since the lot of the cold-rolled steel plate to which the dirt used adhered differs in the result of Table 6, it cannot be directly compared with the drainability of Tables 1 to 5 and 7 to 12.

Claims (8)

The following general formula (1):

(Wherein R ¹ represents a hydrocarbon group having 6 to 22 carbon atoms, R ² represents a hydrogen atom or a hydrocarbon group having 1 to 22 carbon atoms, R ³ and R ⁴ are the same or different, .X indicating the atom or having 1 or more carbon atoms of 3 or less hydrocarbon groups ^- from component (a) is at least one selected from compounds represented by represents an inorganic anion or an organic anion).
The following general formula (2):
R ⁵ —O— (A ¹ O) _m H (2)
(In the formula, R ⁵ is a linear or branched alkyl group or alkenyl group having 10 to 20 carbon atoms, A ¹ O is an alkyleneoxy group having 2 to 4 carbon atoms, m represents the average number of moles added, A number of 1 to 100. m A ¹ Os may be the same or different from each other.) The component (b) is at least one selected from the compounds represented by:
The rinse agent composition for steel plates containing the component (c) which is at least 1 sort (s) chosen from the ester of a C12-C22 fatty acid and a hydroxyl group having a C2-C6 polyhydric alcohol.   The rinse agent composition for steel sheets according to claim 1, wherein the polyhydric alcohol constituting the component (c) is at least one selected from polyalkylene glycol, glycerin and sorbitan.   The rinse agent composition for steel sheet according to claim 1 or 2, wherein a mass ratio of the component (b) and the component (c) is 0.20 or more and 9.0 or less as a component (b) / component (c). .   The mass ratio of said component (a), said component (b), and said component (c) is 0.80 or more and 9.0 or less by component (a) / [component (b) + component (c)]. Item 4. A rinsing agent composition for steel sheet according to any one of Items 1 to 3.   Furthermore, it contains one or more compounds selected from the group consisting of an alkyl glycoside having an alkyl group having 6 to 22 carbon atoms and a polyoxyalkylene alkyl ether having an alkyl group having 1 to 9 carbon atoms. Item 5. A rinsing agent composition for steel sheet according to any one of Items 1 to 4. A cleaning step (1) for cleaning the steel sheet after cold rolling;
Rinsing step (2) after the washing step (1)
A method for producing a steel sheet comprising a drying step (3) for drying the steel plate after the rinsing step (2) has been performed,
The said rinsing process (2) contains the 1 or more rinse process, The manufacturing method of the steel plate using the rinse agent composition for steel plates in any one of Claims 1-5 for the last rinse process.   The manufacturing method of the steel plate of Claim 6 whose last rinse process of the said rinse process (2) is a spray rinse process.   The said washing | cleaning process (1) and a rinse process (2) are provided as a continuous line which conveys a steel plate, and the conveyance speed of a steel plate is 30 m / min or more and 1000 m / min or less of Claim 6 or 7. A method of manufacturing a steel sheet.