Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/825—Mixtures of compounds all of which are non-ionic
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D11/00—Special methods for preparing compositions containing mixtures of detergents ; Methods for using cleaning compositions
  • C11D11/0082—Special methods for preparing compositions containing mixtures of detergents ; Methods for using cleaning compositions one or more of the detergent ingredients being in a liquefied state, e.g. slurry, paste or melt, and the process resulting in solid detergent particles such as granules, powders or beads
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D11/00—Special methods for preparing compositions containing mixtures of detergents ; Methods for using cleaning compositions
  • C11D11/0094—Process for making liquid detergent compositions, e.g. slurries, pastes or gels
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2003—Alcohols; Phenols
  • C11D3/2041—Dihydric alcohols
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2068—Ethers
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/26—Organic compounds containing nitrogen
  • C11D3/30—Amines; Substituted amines ; Quaternized amines
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
  • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
  • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
  • C23G1/19—Iron or steel
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/38—Cationic compounds
  • C11D1/42—Amino alcohols or amino ethers
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/38—Cationic compounds
  • C11D1/42—Amino alcohols or amino ethers
  • C11D1/44—Ethers of polyoxyalkylenes with amino alcohols; Condensation products of epoxyalkanes with amines
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols

Definitions

• the present invention relates to a method for producing an alkaline detergent composition for a steel sheet used for cleaning oil stains, iron powder, and the like adhering to a steel sheet (steel strip) made of iron, aluminum, copper or the like.
• Degreasing and cleaning of the steel sheet surface is necessary as a pretreatment for performing surface treatment such as plating and painting along with pickling, and is a very large factor that determines the quality of products.
• the dirt adhering to the steel sheet surface include oil dirt such as rolling oil and rust preventive oil adhering during cold rolling, and solid dirt such as iron powder.
• rolling oil suitable for improving mill cleanliness and productivity has come to be used, and a cleaning agent having excellent cleaning properties for rolling oil is required.
• the cleaning agent is required to have fluidity even at a high concentration and to have excellent storage stability.
• the cleaning agent is also required to have low foaming and excellent workability.
• JP-A-7-41975 alcohols, surfactants, fatty acids, chelating agents, etc., which are usually poorly soluble at a high alkali concentration, can be blended, and the high detergency, foam suppression,
• the alkali agent is 10 to 35% by weight on the basis of Na 2 O
• the aliphatic compound having 2 to 6 polar groups in one molecule is 0.1 to
• a high-concentration one-component alkaline detergent composition characterized by containing 20% by weight is disclosed.
• Japanese Patent Application Laid-Open No. 2011-117043 discloses that a steel plate can be cleaned and removed with high cleaning efficiency while suppressing slippage of the steel plate on a roll at a low cleaning temperature of 40 to 60 ° C., and foaming is prevented.
• an alkaline detergent composition for steel sheet that can be suppressed an alkaline agent, two types of polyoxyalkylene alkyl ethers in which oxyalkylene is bonded to a secondary alcohol having 9 to 15 carbon atoms, An alkaline detergent composition for steel sheet containing a chelating agent and water is disclosed.
• Japanese Patent Application Laid-Open No. 2001-316693 has an object to provide a liquid alkaline detergent composition that has excellent detergency, does not foam during washing, can be stably stored in a concentrated state, and does not adversely affect the global environment.
• a liquid alkaline detergent composition comprising an alkali agent and a polyoxyethylene amino ether having a linear or branched alkyl group or alkenyl group having 10 to 20 carbon atoms is disclosed.
• a component containing an alkaline agent (A), a chelating agent (B), a nonionic surfactant (C), a slurrying agent (D), a dispersing agent (E) and water (F) is mixed with a stirring blade.
• a method for producing an alkaline detergent composition for a steel sheet comprising the step (1) of introducing into a stirring tank having a step and the step (2) of mixing the components by rotating the stirring blade, wherein the step (1)
• the proportion of the component introduced into the stirring tank in the above is as follows: alkaline agent (A) 34 wt% or more and 45 wt% or less, chelating agent (B) 0.5 wt% or more and 12 wt% or less, nonionic surfactant ( C) 0.1 wt% or more and 8 wt% or less, slurrying agent (D) 0.4 wt% or more and 4.5 wt% or less, dispersant (E) 0.05 wt% or more and 2.0 wt% or less
• the dispersant (E) is composed of compounds represented by the following general formulas (1) to (5) A dispersion in which oil droplets of the nonionic surfactant (C) having a particle diameter of less than 50 ⁇ m are dispersed in a
• R 1 is a hydrocarbon group having 1 to 4 carbon atoms
• R 2 is a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms
• R 3 is a hydrogen atom or a methyl group.
• R 4 is a hydrocarbon group having 1 to 6 carbon atoms
• a 1 O is an alkyleneoxy group having 2 or 3 carbon atoms
• m is an average added mole number of A 1 O of 0 or more. 3 or less
• the total number of carbon atoms of (A 1 O) m is 0 or more and 6 or less.
• R 5 represents a hydrogen atom or a hydrocarbon group having 1 or 2 carbon atoms.
• R 6 is a hydrogen atom or a methyl group.
• R 7 is — (A 2 O) n3 —H or a compound represented by the following general formula (6);
• a 2 O is an alkyleneoxy group having 2 or 3 carbon atoms, n1, n2, n3 and n4 are each an integer indicating the number of moles of A 2 O added, and the average value of the total of n1, n2, n3 and n4 is 0.5 or more and 8 or less.
• the present invention is for a steel sheet containing an alkali agent (A), a chelating agent (B), a nonionic surfactant (C), a slurrying agent (D), a dispersing agent (E) and water (F).
• A alkali agent
• B a chelating agent
• C nonionic surfactant
• D a slurrying agent
• E dispersing agent
• F water
• An alkaline detergent composition wherein the proportion of each component is from 34% to 45% by weight of the alkali agent (A), 0.5% to 12% by weight of the chelating agent (B), a nonionic interface Activator (C) 0.1 wt% to 8 wt%, Slurrant (D) 0.4 wt% to 4.5 wt%, Dispersant (E) 0.05 wt% to 2.0 wt% % Or less, and the dispersant (E) is at least one selected from the group consisting of compounds represented by the general formulas (1) to (5), and the alkaline detergent composition for steel sheet, Oil droplets of the nonionic surfactant (C) having a particle size of less than 50 ⁇ m are dispersed in the phase containing water (F). A dispersion, a steel sheet for an alkaline detergent composition.
• JP-A-7-41975 and JP-A-111-117043 concentrated detergents are produced.
• the blended raw materials are used as a line mixer.
• a step of stirring with an apparatus having a high shearing force such as a homomixer and a homogenizer is required.
• the liquid alkaline detergent composition disclosed in JP-A-2001-316693 can be stably stored, but if the shearing force during stirring of the raw material containing polyoxyethylene amino ether, which is an oil component, is low, the oil component is reduced. It became difficult to reduce the particle size, and the stability tended to decrease. Therefore, there is a demand for a method of producing a concentrated detergent composition having excellent storage stability by using a stirring device having a stirring blade having a low shearing force instead of a stirring device having a high shearing force.
• a component containing an alkaline agent (A), a chelating agent (B), a nonionic surfactant (C), a slurrying agent (D), a dispersing agent (E) and water (F) is mixed with a stirring blade.
• a method for producing an alkaline detergent composition for a steel sheet comprising the step (1) of introducing into a stirring tank having a step and the step (2) of mixing the components by rotating the stirring blade, wherein the step (1)
• the proportion of the component introduced into the stirring tank in the above is as follows: alkaline agent (A) 34 wt% or more and 45 wt% or less, chelating agent (B) 0.5 wt% or more and 12 wt% or less, nonionic surfactant ( C) 0.1 wt% or more and 8 wt% or less, slurrying agent (D) 0.4 wt% or more and 4.5 wt% or less, dispersant (E) 0.05 wt% or more and 2.0 wt% or less
• the dispersant (E) comprises the compounds represented by the general formulas (1) to (5).
• the present invention is for a steel sheet containing an alkali agent (A), a chelating agent (B), a nonionic surfactant (C), a slurrying agent (D), a dispersing agent (E) and water (F).
• A alkali agent
• B a chelating agent
• C nonionic surfactant
• D a slurrying agent
• E dispersing agent
• F water
• An alkaline detergent composition wherein the proportion of each component is from 34% to 45% by weight of the alkali agent (A), 0.5% to 12% by weight of the chelating agent (B), a nonionic interface Activator (C) 0.1 wt% to 8 wt%, Slurrant (D) 0.4 wt% to 4.5 wt%, Dispersant (E) 0.05 wt% to 2.0 wt% % Or less, and the dispersant (E) is at least one selected from the group consisting of compounds represented by the general formulas (1) to (5), and the alkaline detergent composition for steel sheet, Oil droplets of the nonionic surfactant (C) having a particle size of less than 50 ⁇ m are dispersed in the phase containing water (F).
• a concentrated detergent composition having excellent storage stability in a stirring tank having a stirring blade. Further, according to the present invention, a concentrated detergent composition having excellent storage stability can be provided.
• the nonionic surfactant forms oil droplets.
• the oil droplet particle size decreases and storage stability improves, but when the shear force is weak, there are oil droplets with large particle size, and there are chelating agents and slurry agents. Even with time, the oil droplets coalesce with each other to form larger oil droplets and finally separate from the water phase as the oil phase.
• a dispersant is formed at the interface between oil droplets and water together with a chelating agent and a slurrying agent.
• the oil droplets are adsorbed and the interfacial tension of the oil droplets is lowered, and the oil droplets are easily broken.
• the oil droplets are easily dispersed even with low shearing force stirring, and the particle size of the oil droplets is small.
• the oil droplets are stabilized by a chelating agent, a slurrying agent and a dispersing agent, and the storage stability of the cleaning composition is improved. That is, when stirring at a high shear force, a detergent composition having excellent stability can be obtained without a specific dispersant, but in the case of a low shear force, stability can be obtained by adding a specific dispersant. An excellent cleaning composition is obtained.
• the manufacturing method of this embodiment is a component containing an alkali agent (A), a chelating agent (B), a nonionic surfactant (C), a slurrying agent (D), a dispersing agent (E), and water (F).
• A alkali agent
• B a chelating agent
• C nonionic surfactant
• D a slurrying agent
• E dispersing agent
• F water
• any water-soluble alkaline agent can be used in order to ensure the removal of oil stains.
• alkali metal hydroxides such as sodium hydroxide and potassium hydroxide
• alkali metal silicates such as sodium orthosilicate, sodium metasilicate and sodium sesquisilicate
• alkali metal phosphorus such as trisodium phosphate.
• An alkali metal carbonate such as an acid salt, disodium carbonate, sodium hydrogen carbonate or dipotassium carbonate, an alkali metal borate such as sodium borate, or the like can be used.
• Two or more water-soluble alkaline agents may be combined.
• alkali metal hydroxides and alkali metal silicates preferred are alkali metal hydroxides.
• sodium hydroxide, potassium hydroxide, sodium orthosilicate and sodium metasilicate are preferable, and sodium hydroxide or potassium hydroxide is more preferable.
• the blending amount of the alkaline agent (A) is 34% by weight or more and 45% by weight or less.
• the blending amount of the alkaline agent (A) is preferably 35% by weight or more, and more preferably 37% by weight or more, from the viewpoint of the storage stability of the cleaning agent.
• the blending amount of the alkaline agent (A) is preferably 42% by weight or less, and more preferably 40% by weight or less, from the viewpoint of suppressing the viscosity increase of the cleaning agent.
• the blending amount of the alkaline agent (A) corresponds to the content of the alkaline agent in the alkaline detergent composition for steel sheet.
• ⁇ Chelating agent (B)> The chelating agent (B) used in this embodiment improves the storage stability by reducing the particle size of oil droplets (hereinafter also simply referred to as “oil droplets”) such as a nonionic surfactant (C), It is also presumed that it acts on iron soap and other soils to chelate iron ions and the like, making it easier to dissolve the soil using fatty acid sodium soap and improving the detergency of oil.
• oil droplets such as a nonionic surfactant (C)
• Examples of the chelating agent (B) include aldonic acids such as gluconic acid, glucoheptonic acid, glyceric acid, tetronic acid, pentonic acid, hexonic acid and heptonic acid, or alkali metal salts thereof or lower amine salts having 1 to 4 carbon atoms; Alkali metal salt or lower amine salt of aminocarboxylic acid such as acetic acid, ethylenediaminetetraacetic acid, ethylenediaminediacetic acid, tetraethylenetetraminehexaacetic acid; alkali metal salt or lower amine salt of citric acid, malic acid or the like or oxycarboxylic acid thereof; amino Phosphonic acids such as trimethylenephosphonic acid, hydroxyethylidene diphosphonic acid, ethylenediaminetetramethylenephosphonic acid, diethylenetriaminepentamethylenephosphonic acid or alkali metal salts or lower amine salts thereof; Ethanolamine, can be used
• aldonic acid or a salt thereof is preferable, and an alkali metal salt or a lower amine salt is preferable.
• alkali metal salts or lower amine salts of gluconic acid and glucoheptonic acid are preferable, and gluconate is more preferable.
• the alkali metal salt is preferably a sodium salt from the viewpoint of improving detergency.
• Chelating agent (B) should just use at least 1 type, and can be used in combination of 2 or more type. For example, a combination of an alkali metal salt of gluconic acid and an alkali metal salt of ethylenediaminetetraacetic acid can be used.
• the compounding amount of the chelating agent (B) is 0.5% by weight or more and 12% by weight or less.
• the blending amount of the chelating agent (B) is preferably 1% by weight or more, more preferably 3% by weight or more, and more preferably 5% by weight or more from the viewpoint of reducing the particle size of the oil droplets of the nonionic surfactant (C). Is more preferable, and 6% by weight or more is even more preferable.
• the blending amount of the chelating agent (B) is preferably 10% by weight or less, and preferably 8% by weight or less from the viewpoint of reducing the particle size of the oil droplets of the nonionic surfactant (C).
• the compounding amount of the chelating agent (B) corresponds to the content of the chelating agent in the alkaline detergent composition for steel sheet.
• Nonionic surfactant (C) used in the present embodiment those generally used for alkaline detergents can be used. However, the nonionic surfactant (C) does not include a compound belonging to the dispersant (E).
• the nonionic surfactant (C) used in the present embodiment include a compound having a structure in which an alkylene oxide is added to a monohydric alcohol having a hydrocarbon group having 8 or more carbon atoms, and having 8 or more carbon atoms.
• a compound having a structure in which an alkylene oxide is added to a monovalent or divalent amine having a hydrocarbon group can be used.
• polyoxyalkylene alkyl ether, polyoxyalkylene alkenyl ether, polyoxyethylene alkylamine, and polyoxyethylene alkenylamine can be used.
• the nonionic surfactant (C) is at least one selected from a compound represented by the following general formula (7) and a compound represented by the following general formula (8) from the viewpoint of oil detergency. It is preferable.
• R 8 represents a hydrocarbon group having 8 to 18 carbon atoms
• a 3 O represents an alkyleneoxy group having 2 to 4 carbon atoms
• o represents an average addition of A 3 O.
• the number of moles is 2 or more and 20 or less.
• R 9 represents a hydrocarbon group having 8 to 18 carbon atoms
• a 4 O represents an alkyleneoxy group having 2 to 4 carbon atoms
• p and q are averages of A 4 O, respectively. The number of added moles is shown, and p + q is 2 or more and 20 or less.
• R 8 may be a linear or branched aliphatic hydrocarbon group having 8 to 18 carbon atoms from the viewpoint of oil detergency.
• the aliphatic hydrocarbon group include saturated (alkyl group) and unsaturated (alkenyl group).
• the carbon number of R 8 is preferably 14 or less, and more preferably 12 or less, from the viewpoint of oil detergency.
• Specific examples of the compound represented by the general formula (7) include polyoxyalkylene alkyl ether and polyoxyalkylene alkenyl ether.
• the alkyleneoxy group represented by A 3 O is an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group. From the viewpoint of storage stability of the cleaning agent, an ethyleneoxy group and / or propylene An oxy group is preferable, and one having both an ethyleneoxy group and a propyleneoxy group is more preferable.
• the average addition mole number o of the alkyleneoxy group represented by A 3 O is 2 or more, and preferably 4 or more, from the viewpoint of oil detergency.
• the average added mole number o of the alkyleneoxy group represented by A 3 O in the general formula (7) is 20 or less, and preferably 16 or less, from the viewpoint of oil detergency.
• R 9 is a linear or branched aliphatic hydrocarbon group having 8 to 18 carbon atoms from the viewpoint of oil detergency.
• the aliphatic hydrocarbon group include saturated (alkyl group) and unsaturated (alkenyl group).
• the number of carbon atoms in R 9 is preferably 12 or more, more preferably 16 or more, from the viewpoint of oil detergency.
• Specific examples of the compound represented by the general formula (8) include polyoxyethylene alkylamine and polyoxyethylene alkenylamine.
• At least one kind of nonionic surfactant (C) may be used, and two or more kinds may be used in combination.
• the alkyleneoxy group represented by A 4 O is an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group, and is preferably an ethyleneoxy group and / or a propyleneoxy group from the viewpoint of detergency.
• An ethyleneoxy group is more preferable.
• the average added mole numbers p and q of the alkyleneoxy group in the general formula (8) are 2 or more, preferably 5 or more, and more preferably 8 or more. From the viewpoint of oil detergency, the average added mole numbers p and q of the alkyleneoxy group in the general formula (8) are 20 or less, more preferably 12 or less.
• the nonionic surfactant (C) is more preferably the general formula (7) than the general formula (8) from the viewpoint of the storage stability of the cleaning agent.
• the blending amount of the nonionic surfactant (C) is 0.1% by weight or more and 8% by weight or less. In the present embodiment, the blending amount of the nonionic surfactant (C) is preferably 0.5% by weight or more, and more preferably 0.8% by weight or more from the viewpoint of oil detergency. The blending amount of the nonionic surfactant (C) is preferably 5% by weight or less, more preferably 3% by weight or less from the viewpoint of storage stability and cost of the cleaning agent. The compounding amount of the nonionic surfactant (C) corresponds to the content of the nonionic surfactant in the alkaline detergent composition for steel sheet.
• the slurrying agent (D) can be blended with a water-soluble polymer carboxylic acid.
• the cleaning composition containing at least one kind of the water-soluble polymer carboxylic acid can improve the storage stability of the cleaning composition in a liquid or slurry state even at a high concentration.
• the cleaning composition containing water-soluble polymer carboxylic acid is diluted with water, it maintains the dispersion of the iron powder released in the steel plate cleaning process and makes it difficult to adhere to the steel plate. It contributes to the improvement.
• Water-soluble polymer carboxylic acid is a polymer containing at least one carboxylic acid, such as acrylic acid homopolymer, acrylic acid-maleic acid copolymer, ⁇ -hydroxyacrylic acid homopolymer, C5 olefin-maleic acid Copolymers, isobutylene-maleic acid copolymers, and alkali metal salts or amine salts such as sodium salts thereof can be used.
• carboxylic acid such as acrylic acid homopolymer, acrylic acid-maleic acid copolymer, ⁇ -hydroxyacrylic acid homopolymer, C5 olefin-maleic acid Copolymers, isobutylene-maleic acid copolymers, and alkali metal salts or amine salts such as sodium salts thereof can be used.
• the water-soluble polymeric carboxylic acids from the viewpoint of improving the storage stability of the detergent composition, one or more selected from acrylic acid homopolymers and acrylic acid-maleic acid copolymers are preferable.
• the weight average molecular weight (MW) of the water-soluble polymer carboxylic acid is 1,000 to 100,000, preferably 3,000 to 50,000, more preferably 5,000 to 20,000, still more preferably 5,000 to 10,000.
• the form of polymerization in the case of a copolymer may be block or random. Two or more water-soluble polymer carboxylic acids may be combined.
• a weight average molecular weight is measured by the method as described in an Example.
• the blending amount of the slurrying agent (D) is 0.4 wt% or more and 4.5 wt% or less.
• the blending amount of the slurry agent (D) is preferably 1% by weight or more, and more preferably 1.2% by weight or more from the viewpoint of storage stability of the cleaning agent.
• the blending amount of the slurry agent (D) is preferably 3% by weight or less, more preferably 2% by weight or less from the viewpoint of appropriately controlling the viscosity of the detergent composition and ensuring the piping transportation of the detergent composition. .
• the blending amount of the slurry agent (D) corresponds to the content of the slurry agent in the alkaline detergent composition for steel sheet.
• the weight ratio of the slurry agent (D) to the nonionic surfactant (C) [slurry agent (D) / nonionic surfactant (C)] is 0.1% from the viewpoint of storage stability of the cleaning agent.
• the above is preferable, and 1 or more is more preferable.
• the weight ratio of the slurry agent (D) to the nonionic surfactant (C) [slurry agent (D) / nonionic surfactant (C)] is 50 or less from the viewpoint of the storage stability of the cleaning agent.
• 15 or less is more preferable, 5 or less is further preferable, and 2 or less is still more preferable.
• Dispersant (E) at least one selected from the compounds represented by the general formulas (1) to (5) is used.
• Dispersant (E) is a stable flow that is obtained by finely dispersing a nonionic surfactant or the like that is hardly soluble in an alkaline aqueous solution in a high-concentration alkaline aqueous solution evenly using a stirring device having a low shearing force stirring blade. This makes it possible to prepare a detergent composition containing alkali at a high concentration. Further, the dispersant (E) stabilizes the cleaning composition, but does not adversely affect the antifoaming performance of the cleaning agent.
• R 1 is a hydrocarbon group having 1 to 4 carbon atoms.
• the number of carbon atoms of R 1 is preferably 1 or more and 3 or less from the viewpoint of storage stability of the cleaning agent.
• R 2 is a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms.
• the number of carbon atoms of R 2 is preferably 1 or more and 2 or less from the viewpoint of storage stability of the cleaning agent.
• R 3 is a hydrogen atom or a methyl group, and a hydrogen atom is preferable from the viewpoint of storage stability of the cleaning agent.
• the compound represented by the general formula (1) is N-alkylmonoalkanolamine or N, N-dialkylmonoalkanolamine, specifically, N-methylethanolamine, N-ethylethanolamine, Nn -Butylethanolamine, N-isobutylethanolamine, N-tert-butylethanolamine, N-methylisopropanolamine, N, N-dimethylethanolamine, N, N-diethylethanolamine, N, N-methylethylethanolamine and N, N-dimethylisopropanolamine or the like can be used.
• N-ethylethanolamine and N, N-dimethylethanolamine are preferable from the viewpoint of storage stability of the detergent, and N-ethylethanolamine is more preferable.
• R 4 is a hydrocarbon group having 1 to 6 carbon atoms.
• the aliphatic hydrocarbon group for R 4 include saturated (alkyl group) and unsaturated (alkenyl group), and saturated is preferable from the viewpoint of storage stability of the detergent.
• the aliphatic hydrocarbon group includes straight and branched chains, and is preferably a straight chain from the viewpoint of the storage stability of the detergent.
• the number of carbon atoms in R 4 is preferably 2 or more, and more preferably 3 or more, from the viewpoint of storage stability of the cleaning agent.
• the number of carbon atoms of R 4 is preferably 5 or less, and more preferably 4 or less, from the viewpoint of storage stability of the cleaning agent.
• the alkyleneoxy group has 2 or 3 carbon atoms, and 2 is preferable from the viewpoint of storage stability of the cleaning agent.
• the average added mole number m of the alkyleneoxy group is 0 or more and 3 or less.
• the average added mole number m of the alkyleneoxy group is preferably 1 or more, and preferably 2 or less, from the viewpoint of storage stability of the cleaning agent.
• the total number of carbon atoms of the alkyleneoxy group is 0 or more and 6 or less.
• the total number of carbon atoms of the alkyleneoxy group is preferably 2 or more from the viewpoint of the storage stability of the detergent.
• the total number of carbon atoms of the alkyleneoxy group is preferably 4 or less from the viewpoint of the storage stability of the detergent.
• primary alcohols having 1 to 6 carbon atoms As the compound represented by the general formula (2), primary alcohols having 1 to 6 carbon atoms, ethylene oxide adducts thereof, and propylene oxide adducts thereof can be used.
• Specific examples of primary alcohols having 1 to 6 carbon atoms include methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, secondary butanol, tertiary butanol, n-pentanol, and n-hexanol.
• primary alcohols having 1 to 6 carbon atoms include methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, secondary butanol, tertiary butanol, n-pentanol, and n-hexanol.
• an alkylene glycol monoalkyl ether which is an average of 1 to 3 mol adduct of these ethylene oxides and an average of 1 to 3 mol adducts of these propylene oxides can be used.
• Specific examples include methyl glycol, methyl triglycol, isopropyl glycol, isopropyl diglycol, butyl glycol, butyl diglycol, butyl triglycol, isobutyl glycol, isobutyl diglycol, isobutyl triglycol, hexyl glycol, methyl propylene glycol, methyl propylene Diglycol and allyl glycol can be used.
• R 5 is a hydrogen atom or a hydrocarbon group having 1 or 2 carbon atoms.
• 1,2-diol having 2 to 4 carbon atoms in total can be used. Specifically, ethylene glycol, propylene glycol, and butylene glycol can be used.
• R 6 is a hydrogen atom or a methyl group, and a methyl group is preferable from the viewpoint of storage stability of the detergent.
• N- ( ⁇ -aminoether) ethanolamine and N- ( ⁇ -aminoether) isopropanolamine can be used as the compound represented by the general formula (4).
• N- ( ⁇ -aminoether) isopropanolamine is preferable from the viewpoint of storage stability of the cleaning agent.
• R 7 is — (A 2 O) n1 —H or a compound represented by the general formula (6), and A 2 O is an alkyleneoxy group having 2 or 3 carbon atoms. Yes, 2 carbon atoms are preferred.
• n1, n2, n3 and n4 are each an integer indicating the number of moles of A 2 O added.
• the average value of the total of n1, n2, n3 and n4 in the compound represented by the general formula (5) is 0.5 or more and 8.0 or less, and preferably 1.0 or more from the viewpoint of the storage stability of the cleaning agent. 1.5 or more is more preferable, and 5.0 or less is preferable, 3.5 or less is more preferable, and 2.5 or less is more preferable.
• a compound obtained by adding ethylene oxide and / or propylene oxide to one or more compounds selected from glycerin and diglycerin can be used.
• a compound obtained by adding ethylene oxide and / or propylene oxide to glycerin is preferable.
• the compound represented by the general formula (1) and the compound represented by the general formula (4) are preferable from the viewpoint of the storage stability of the cleaning agent.
• N-ethylethanolamine and N- ( ⁇ -aminoether) isopropanolamine are preferable from the viewpoint of the storage stability of the cleaning agent, and N-ethylethanolamine is more preferable from the viewpoint of the cleanability of the steel sheet.
• the blending amount of the dispersant (E) is 0.05% by weight or more and 2.0% by weight or less.
• the blending amount of the dispersant (E) is preferably 0.1% by weight or more, more preferably 0.3% by weight or more, and still more preferably 0.4% by weight or more, from the viewpoint of the storage stability of the detergent composition. .
• the blending amount of the dispersant (E) is preferably 1.8% by weight or less, more preferably 1.5% by weight or less, more preferably 1.0% by weight from the viewpoint of the storage stability of the detergent composition and the blending cost of the detergent. % Or less is even more preferable.
• the compounding quantity of a dispersing agent (E) is corresponded to content of the dispersing agent in the alkaline cleaning composition for steel plates.
• the weight ratio of the dispersant (E) to the nonionic surfactant (C) [dispersant (E) / nonionic surfactant (C)] is preferably 0.1 or more from the viewpoint of the storage stability of the cleaning agent. 0.4 or more is more preferable.
• the weight ratio of the dispersant (E) to the nonionic surfactant (C) [dispersant (E) / nonionic surfactant (C)] is 4.0 or less from the viewpoint of the storage stability of the cleaning agent. Preferably, 2.0 or less is more preferable, and 1.5 or less is more preferable.
• the blending amount of water (F) is the total amount of alkali agent (A), chelating agent (B), nonionic surfactant (C), slurrying agent (D), dispersing agent (E) and other components.
• the blending amount of water (F) may be the balance of the total amount of alkaline agent (A), chelating agent (B), nonionic surfactant (C), slurrying agent (D), and dispersing agent (E).
• it is preferably 70% by weight or less, more preferably 65% by weight or less, still more preferably 60% by weight or less, and even more preferably 55% by weight or less.
• the alkaline detergent composition for a steel sheet includes an alkali agent (A), a chelating agent (B), a nonionic surfactant (C), a slurrying agent (D), a dispersing agent (E) and water (F).
• alkali agent (A) a chelating agent
• C a nonionic surfactant
• D a slurrying agent
• E dispersing agent
• G water
• Other components such as an antifoaming agent (G) can be contained.
• the antifoaming agent (G) from the viewpoint of storage stability of the cleaning composition, it is preferable to use a primary alcohol having 8 or more carbon atoms, more preferably a primary alcohol having 10 to 22 carbon atoms, A primary alcohol of 12 or more and 20 or less is more preferable.
• a primary alcohol having 8 or more carbon atoms more preferably a primary alcohol having 10 to 22 carbon atoms
• a primary alcohol of 12 or more and 20 or less is more preferable.
• decanol, lauryl alcohol, tridecanol, myristyl alcohol, palmityl alcohol, stearyl alcohol, isostearyl alcohol, and the like can be used.
• the blending amount of the antifoaming agent (G) is preferably 0.1% by weight or more, and more preferably 0.3% by weight or more from the viewpoint of further improving the storage stability of the cleaning composition.
• the blending amount of the antifoaming agent (G) is preferably 1% by weight or less, and more preferably 0.7% by weight or less from the viewpoint of storage stability of the cleaning composition.
• the compounding quantity of an antifoamer (G) is corresponded to content of the antifoamer in the said process (1).
• step (1) it is preferable to prepare a chelating agent aqueous solution by mixing the chelating agent (B) and water (F).
• the nonionic surfactant (C), the slurrying agent (D), the dispersing agent (E), and if necessary, the antifoaming agent (G) to the chelating agent aqueous solution and mixing them.
• an alkaline agent (A) it is preferable to add an alkaline agent (A) to these liquid mixture.
• a stirring device having a stirring blade with low shearing force can be used as the stirring device.
• the peripheral speed of rotation of the stirring blade is preferably 0.45 m / s or more, more preferably 0.48 m / s or more, still more preferably 0.52 m / s or more, from the viewpoint of the storage stability of the cleaning composition. 0.75 m / s or more is even more preferable.
• the peripheral speed of rotation of the stirring blade is preferably 1.20 m / s or less, more preferably 1.10 m / s or less, and 0.90 m / s from the viewpoint of preventing deterioration of the storage stability of the detergent due to entrainment of bubbles. The following is more preferable.
• the amount of electric power when rotating the stirring blade is preferably 3.5 kw / kg or more, more preferably 6.0 kw / kg or more, and 6.5 kw / kg or more from the viewpoint of storage stability of the cleaning composition. Further, from the viewpoint of preventing the storage stability of the cleaning agent from being lowered due to entrainment of foam, it is preferably 20 kw / kg or less, more preferably 18 kw / kg or less, and even more preferably 17 kw / kg or less.
• the type of the stirring blade is not particularly limited, and for example, stirring blades known in the art such as paddle blades, propeller blades, anchor blades, and the like can be used. From the viewpoint of uniform dispersion, the stirring blade is preferably a paddle blade. The number of blades can be selected as appropriate. In order to improve the stirring shear force, a baffle plate may be installed in the stirring tank.
• the stirring time is preferably 30 minutes or more, more preferably 60 minutes or more, and still more preferably 100 minutes or more, from the viewpoint of the storage stability of the cleaning composition.
• the stirring time is preferably 300 minutes or less, more preferably 200 minutes or less, and even more preferably 150 minutes or less from the viewpoint of the production efficiency of the cleaning composition.
• the temperature of the alkaline detergent composition for steel plate during stirring is not particularly limited, and may be room temperature, for example.
• the temperature of the alkaline detergent composition for steel plate during stirring is preferably 5 ° C or higher, more preferably 10 ° C or higher, and further preferably 20 ° C or higher, from the viewpoint of storage stability of the cleaning composition.
• the temperature of the alkaline detergent composition for steel plate during stirring is preferably 50 ° C. or less from the viewpoint of storage stability of the detergent composition.
• the alkaline detergent composition for steel sheet obtained in the step (2) is a dispersion in which oil droplets having a particle diameter of less than 50 ⁇ m are dispersed in a phase containing water.
• the particle diameter of the oil droplet is preferably 45 ⁇ m or less, more preferably 40 ⁇ m or less, still more preferably 35 ⁇ m or less, still more preferably 30 ⁇ m or less, and even more preferably 25 ⁇ m or less.
• the particle diameter of the oil droplet is preferably 10 ⁇ m or more, and more preferably 12 ⁇ m or more.
• the step (3) of further storing the alkaline detergent composition for steel sheet at 10 ° C. or more and 50 ° C. or less for 7 days or more, and water and the stored alkaline detergent composition for steel sheet are mixed It is preferable to have a step (4) of obtaining a water-diluted cleaning liquid (hereinafter also referred to as a second steel sheet alkaline cleaning composition) used for cleaning the steel sheet.
• the dilution factor is preferably 12 to 40 times, more preferably 15 to 30 times, from the viewpoint of the cleanability of the steel sheet.
• the storage temperature of the steel sheet alkaline detergent composition is preferably 10 ° C. or higher, more preferably 20 ° C. or higher, from the viewpoint of storage stability. Moreover, 50 degreeC or less is preferable from a viewpoint of storage stability, and, as for the storage temperature of the alkaline cleaning composition for steel plates obtained with the manufacturing method of this embodiment, 40 degrees C or less is more preferable.
• the said alkaline cleaning composition for steel plates is excellent in storage stability, it is suitable for storing for 7 days or more in the step (3), and more suitable for storing for 30 days or more.
• storage for 300 days or less is preferable, storage for 200 days or less is more preferable, and storage for 150 days or less is more preferable.
• the content of the alkaline agent (A) in the second alkaline detergent composition for steel sheet obtained in the step (4) is preferably 0.1% by weight or more, and 0.5% by weight from the viewpoint of the steel sheet detergency. % Or more is more preferable. Further, the content of the alkali agent (A) in the second steel sheet alkaline cleaning composition obtained in the step (4) is preferably 20% by weight or less, preferably 10% by weight or less, from the viewpoint of the cleanability of the steel sheet. Is more preferable, and 8 weight% or less is still more preferable.
• the second alkaline detergent composition for steel sheet obtained in the step (4) comprises a cold rolling process for cold rolling a steel sheet in the presence of rolling oil, and a detergent for removing the rolling oil adhering to the rolled steel sheet.
• cleaning process in the manufacturing method of the cold-rolled steel plate which has a washing
• cold rolled steel sheets can be produced by the same method as in the prior art.
• the cold rolling step is a processing step for cold rolling a steel sheet in the presence of rolling oil at a steel mill or the like.
• the rolling oil is cleaned and removed using the second alkaline cleaning composition for steel sheet by continuous cleaning, that is, immersion cleaning, spray cleaning, brush cleaning, electrolytic cleaning, and the like.
• the second alkaline cleaning composition for steel sheet is particularly alkaline cleaning agent when the cleaning process is immersion and electrolytic cleaning, and the rolled steel sheet is passed through a roll into an alkaline immersion cleaning tank and an alkaline electrolytic cleaning tank. Can be suitably used.
• the second steel sheet alkaline detergent composition obtained by the production method of the present embodiment can be used as an alkaline detergent at a washing temperature of 40 to 80 ° C. in the washing step.
• the balance of emulsification is improved, the detergency against dirt adhering to the steel plate is good, and the antifoaming property is good, and slippage on the roll in dipping / electrolytic washing can be suppressed.
• the present invention further discloses the following production method, composition, or application regarding the above-described embodiment.
• Components containing an alkali agent (A), a chelating agent (B), a nonionic surfactant (C), a slurrying agent (D), a dispersing agent (E), and water (F) are mixed with a stirring blade.
• a step (1) of introducing the mixture into a stirring tank having a step, and a step (2) of mixing the components by rotating the stirring blade A method for producing an alkaline detergent composition for steel sheet, comprising:
• the ratio of the components to be introduced into the stirring tank is Alkaline agent (A) is 34% by weight or more, preferably 35% by weight or more, more preferably 37% by weight or more, 45% by weight or less, preferably 42% by weight or less, more preferably 40% by weight or less, Chelating agent (B) 0.5% by weight or more, preferably 1% by weight or more, more preferably 3% by weight or more, still more preferably 5% by weight or more, still more preferably 6% by weight or more, and 12% by weight or less.
• Alkaline agent (A) is 34% by weight or more, preferably 35% by weight or more, more preferably 37% by weight or more, 45% by weight or less, preferably 42% by weight or less, more preferably 40% by weight or less
• Nonionic surfactant (C) is 0.1 wt% or more, preferably 0.5 wt% or more, more preferably 0.8 wt% or more, 8 wt% or less, and preferably 5 wt% or less.
• Slurry agent (D) is 0.4 wt% or more, preferably 1 wt% or more, more preferably 1.2 wt% or more, 4.5 wt% or less, preferably 3 wt% or less, 2 wt% % Or less is more preferable.
• the dispersant (E) is 0.05% by weight or more, preferably 0.1% by weight or more, more preferably 0.3% by weight or more, still more preferably 0.4% by weight or more, and 2.0% by weight or less.
• the dispersant (E) is one or more selected from the group consisting of compounds represented by the following general formulas (1) to (5), [In the general formula (1), R 1 is a hydrocarbon group having 1 or more carbon atoms and 4 or less, preferably 3 or less, and R 2 is a hydrogen atom or 1 or more carbon atoms and 3 or less, A hydrocarbon group of 2 or less is preferred, and R 3 is preferably a hydrogen atom, a methyl group or a hydrogen atom.
• R 4 has 1 or more carbon atoms, preferably 2 or more, more preferably 3 or more, 6 or less, preferably 5 or less, more preferably 4 or less, A 1 O is an alkyleneoxy group having 2 or 3 carbon atoms, m is an average added mole number of A 1 O of 0 or more, preferably 1 or more, 3 or less, and preferably 2 or less, (A 1 O) m The total number of carbon atoms is 0 or more, preferably 2 or more, 6 or less, and 4 or less.
• R 5 represents a hydrogen atom or a hydrocarbon group having 1 or 2 carbon atoms.
• R 6 is a hydrogen atom or a methyl group.
• R 7 is — (A 2 O) n3 —H or a compound represented by the following general formula (6);
• a 2 O is an alkyleneoxy group having 2 or 3 carbon atoms, preferably 2;
• n1, n2, n3 and n4 are each an integer indicating the number of moles of A 2 O added, and the total of n1, n2, n3 and n4
• the average value is 0.5 or more, preferably 1.0 or more, more preferably 1.5 or more and 8 or less, preferably 5.0 or less, more preferably 3.5 or less, still more preferably 2.5 or less. is there.
• the steel sheet alkaline detergent composition is a dispersion in which oil droplets of the nonionic surfactant (C) having a particle diameter of less than 50 ⁇ m are dispersed in a phase containing water (F).
• the stirring blade is preferably at least 3.5 kw / kg, more preferably at least 6.0 kw / kg, preferably at most 20 kw / kg, more preferably at most 18 kw / kg, even more preferably Is a method for producing an alkaline detergent composition for steel sheet according to the above ⁇ 1>, wherein each component is mixed by rotating at an electric energy of 17 kw / kg or less.
• R 8 preferably has 8 or more carbon atoms, preferably 18 or less, more preferably 14 or less, and still more preferably 12 or less, and A 3 O has 2 to 4 carbon atoms.
• An alkyleneoxy group is preferable, and o is an average added mole number of A 3 O, preferably 2 or more, more preferably 4 or more, preferably 20 or less, and more preferably 16 or less.
• R 9 preferably has 8 or more carbon atoms, more preferably 12 or more, still more preferably 16 or more, and more preferably 18 or less, and A 4 O has 2 to 4 carbon atoms.
• An alkyleneoxy group is preferable, an ethyleneoxy group is more preferable, p and q each represent an average added mole number of A 4 O, p + q is preferably 2 or more, more preferably 5 or more, still more preferably 8 or more, and 20 or less Is preferable, and 12 or less is more preferable.
• ⁇ 4> The method for producing an alkaline detergent composition for a steel sheet according to any one of ⁇ 1> to ⁇ 3>, wherein the slurry agent (D) is a water-soluble polymer carboxylic acid.
• the weight ratio of the slurry agent (D) and the nonionic surfactant (C), and the slurry agent (D) / nonionic surfactant (C) is preferably 0.1 or more, and preferably 1 or more. Is more preferably 50 or less, more preferably 15 or less, still more preferably 5 or less, and even more preferably 2 or less of the alkaline detergent composition for steel sheet according to any one of the above ⁇ 1> to ⁇ 4> Production method.
• the proportion of water (F) is preferably 45% by weight or more, more preferably 50% by weight or more, preferably 70% by weight or less, more preferably 65% by weight or less, still more preferably 60% by weight or less, 55
• the dispersant (E) is (1 ') Methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, senandary butanol, tertiary butanol, n-pentanol and n-hexanol, methyl glycol, methyl triglycol, isopropyl glycol, isopropyldi Glycol, butyl glycol, butyl diglycol, butyl triglycol, isobutyl glycol, isobutyl diglycol, isobutyl triglycol, hexyl glycol, methyl propylene glycol, methyl propylene diglycol, allyl glycol, (2 ′) ethylene glycol, propylene glycol, butylene glycol, (3 ′) N-methylethanolamine, N-ethylethanolamine, Nn-butylethanolamine, N-is
• the weight ratio of the dispersant (E) to the nonionic surfactant (C) [dispersant (E) / nonionic surfactant (C)] is preferably 0.1 or more, and 0.4 or more. More preferably, 4.0 or less, more preferably 2.0 or less, and even more preferably 1.5 or less, the method for producing an alkaline detergent composition for steel sheet according to any one of the above ⁇ 1> to ⁇ 7> .
• the weight average molecular weight (MW) of the slurry agent (D) is preferably 1,000 to 100,000, more preferably 3,000 to 50,000, still more preferably 5,000 to 20,000,
• the content of the antifoaming agent (G) is preferably 0.1% by weight or more, more preferably 0.3% by weight or more, preferably 1% by weight or less, more preferably 0.7% by weight or less.
• ⁇ 12> Further, a step (3) of storing the alkaline detergent composition for a steel sheet obtained by the production method according to any one of ⁇ 1> to ⁇ 11> at 10 ° C. or more and 50 ° C.
• the stirring blade has a peripheral speed of 0.45 m / s or more, preferably 0.48 m / s or more, more preferably 0.52 m / s or more, and further 0.75 m / s or more.
• the time for rotating and mixing each component is preferably 30 minutes or more and 60 minutes or more
• Alkaline detergent for steel sheet containing an alkali agent (A), a chelating agent (B), a nonionic surfactant (C), a slurrying agent (D), a dispersing agent (E) and water (F)
• Alkaline agent (A) is 34% by weight or more, preferably 35% by weight or more, more preferably 37% by weight or more, 45% by weight or less, preferably 42% by weight or less, more preferably 40% by weight or less
• Chelating agent (B) 0.5% by weight or more, preferably 1% by weight or more, more preferably 3% by weight or more, still more preferably 5% by weight or more, still more preferably 6% by weight or more, and 12% by weight or less.
• the nonionic surfactant (C) is 0.1% by weight or more, more preferably 0.5% by weight or more, still more preferably 0.8% by weight or more, 8% by weight or less, and 5% by weight or less.
• Slurry agent (D) is 0.4 wt% or more, preferably 1 wt% or more, more preferably 1.2 wt% or more, 4.5 wt% or less, preferably 3 wt% or less, 2 wt% % Or less is more preferable
• the dispersant (E) is 0.05% by weight or more, preferably 0.1% by weight or more, more preferably 0.3% by weight or more, still more preferably 0.4% by weight or more, and 2.0% by weight or less.
• the dispersant (E) is one or more selected from the group consisting of compounds represented by the following general formulas (1) to (5), [In the general formula (1), R 1 is a hydrocarbon group having 1 or more carbon atoms and 4 or less, preferably 3 or less, and R 2 is a hydrogen atom or 1 or more carbon atoms and 3 or less, A hydrocarbon group of 2 or less is preferred, and R 3 is preferably a hydrogen atom, a methyl group or a hydrogen atom.
• R 4 has 1 or more carbon atoms, preferably 2 or more, more preferably 3 or more, 6 or less, preferably 5 or less, more preferably 4 or less, A 1 O is an alkyleneoxy group having 2 or 3 carbon atoms, m is an average added mole number of A 1 O of 0 or more, preferably 1 or more, 3 or less, and preferably 2 or less, (A 1 O) m The total number of carbon atoms is 0 or more, preferably 2 or more, 6 or less, and 4 or less.
• R 5 represents a hydrogen atom or a hydrocarbon group having 1 or 2 carbon atoms.
• R 6 is a hydrogen atom or a methyl group.
• R 7 is — (A 2 O) n3 —H or a compound represented by the following general formula (6);
• a 2 O is an alkyleneoxy group having 2 or 3 carbon atoms, preferably 2;
• n1, n2, n3 and n4 are each an integer indicating the number of moles of A 2 O added, and the total of n1, n2, n3 and n4
• the average value is 0.5 or more, preferably 1.0 or more, more preferably 1.5 or more and 8 or less, preferably 5.0 or less, more preferably 3.5 or less, still more preferably 2.5 or less. is there.
• the steel sheet alkaline detergent composition is a dispersion in which oil droplets of the nonionic surfactant (C) having a particle diameter of less than 50 ⁇ m are dispersed in a phase containing water (F).
• Composition ⁇ 16> The steel sheet according to ⁇ 15>, wherein the nonionic surfactant (C) is at least one selected from the group consisting of compounds represented by the following general formulas (7) and (8).
• Alkaline detergent composition [In the general formula (7), R 8 preferably has 8 or more carbon atoms, preferably 18 or less, more preferably 14 or less, and still more preferably 12 or less, and A 3 O has 2 to 4 carbon atoms.
• An alkyleneoxy group is preferable, and o is an average added mole number of A 3 O, preferably 2 or more, more preferably 4 or more, preferably 20 or less, and more preferably 16 or less.
• R 9 preferably has 8 or more carbon atoms, more preferably 12 or more, still more preferably 16 or more, and more preferably 18 or less, and A 4 O has 2 to 4 carbon atoms.
• An alkyleneoxy group is preferable, an ethyleneoxy group is more preferable, p and q each represent an average added mole number of A 4 O, p + q is preferably 2 or more, more preferably 5 or more, still more preferably 8 or more, and 20 or less Is preferable, and 12 or less is more preferable.
• p + q is preferably 2 or more, more preferably 5 or more, still more preferably 8 or more, and 20 or less Is preferable, and 12 or less is more preferable.
• the weight ratio of the slurry agent (D) and the nonionic surfactant (C), and the slurry agent (D) / nonionic surfactant (C) is preferably 0.1 or more, and preferably 1 or more. Is more preferably 50 or less, more preferably 15 or less, still more preferably 5 or less, and even more preferably 2 or less, and the alkaline detergent composition for steel sheet according to any one of the above items ⁇ 14> to ⁇ 17>.
• the proportion of water (F) is preferably 45% by weight or more, more preferably 50% by weight or more, preferably 70% by weight or less, more preferably 65% by weight or less, still more preferably 60% by weight or less,
• the dispersant (E) is (1 ') Methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, senandary butanol, tertiary butanol, n-pentanol and n-hexanol, methyl glycol, methyl triglycol, isopropyl glycol, isopropyldi Glycol, butyl glycol, butyl diglycol, butyl triglycol, isobutyl glycol, isobutyl diglycol, isobutyl triglycol, hexyl glycol, methyl propylene glycol, methyl propylene diglycol, allyl glycol, (2 ′) ethylene glycol, propylene glycol, butylene glycol, (3 ′) N-methylethanolamine, N-ethylethanolamine, Nn-butylethanolamine, N-is
• the weight ratio of the dispersant (E) and the nonionic surfactant (C) [dispersant (E) / nonionic surfactant (C)] is preferably 0.1 or more, and 0.4 or more. More preferably, 4.0 or less, more preferably 2.0 or less, and even more preferably 1.5 or less, the alkaline detergent composition for steel sheet according to any one of ⁇ 15> to ⁇ 20>.
• the weight average molecular weight (MW) of the slurry agent (D) is preferably 1,000 to 100,000, more preferably 3,000 to 50,000, still more preferably 5,000 to 20,000, The alkaline cleaner composition for steel sheets according to any one of the above ⁇ 15> to ⁇ 21>, further preferably 5,000 to 10,000.
• the content of the antifoaming agent (G) is preferably 0.1% by weight or more, more preferably 0.3% by weight or more, preferably 1% by weight or less, more preferably 0.7% by weight or less,
• Step (1) As a chelating agent, 60.0 g (10.0 wt%) of sodium gluconate and 88.6 g (14.8 wt%) of water are put into a glass beaker (inner diameter 80.5 mm) having a capacity of 500 ml, An aqueous chelating agent solution was prepared.
• Step (2) The mixture is stirred for 40 minutes at 530 rpm with a stirrer having a stirring blade (four pitched paddles, diameter: 80 mm, blade height is 200 ml of beaker) to obtain an alkaline cleaning composition for steel sheet. It was.
• the peripheral speed is 0.71 m / s.
• Examples 2 to 55, Examples 2-1 to 2-12, Comparative Examples 1 to 32, Comparative Examples 2-1 to 2-5> Prepared in the same manner as in Example 1 except that the components and amounts shown in Tables 1 to 7 were used.
• the unit of the amount described in Tables 1 to 7 is% by weight.
• acetic acid (3.0 g) was added to the autoclave, kept at 80 ° C. for 30 minutes, and then extracted, and an average addition mole number of PO adduct of glycerin with 1 mol (glycerin A) Got.
• acetic acid (3.0 g) was added to the autoclave, kept at 80 ° C. for 30 minutes, then extracted, and an average addition mole number of 2 mol glycerin PO adduct (glycerin B) Got.
• acetic acid (3.0 g) was added to the autoclave, kept at 80 ° C. for 30 minutes, then extracted, and an average addition mole number of 3 mol glycerin PO adduct (glycerin C).
• acetic acid (3.0 g) was added to the autoclave, kept at 80 ° C. for 30 minutes, then extracted, and an average addition mole number of 7 mol glycerin PO adduct (glycerin D) Got.
• acetic acid (3.0 g) was added to the autoclave, kept at 80 ° C. for 30 minutes, then extracted, and an average addition mole number of 12 mol glycerin PO adduct (glycerin K) Got.
• acetic acid (3.0 g) was added to the autoclave, kept at 80 ° C. for 30 minutes, and then extracted, and the glycerin PO adduct (glycerin L) having an average addition mole number of 24 mol. Got.
• ⁇ Dispersant Production Example 12> The autoclave was charged with 92.1 g of glycerin and 1.4 g (1.5 wt%) of KOH, and dehydrated at 110 ° C. and 1.3 kPa for 30 minutes. After dehydration, the air in the autoclave was replaced with nitrogen, the temperature in the autoclave was raised to 130 ° C., and then 396.5 g of ethylene oxide was charged. After addition reaction and aging at 130 ° C., the mixture was cooled to 80 ° C., and unreacted ethylene oxide in the autoclave was removed at 4.0 kPa for 30 minutes. After removing unreacted ethylene oxide, acetic acid (3.0 g) was added to the autoclave, kept at 80 ° C. for 30 minutes, then extracted, and an EO adduct of glycerin having an average addition mole number of 9 mol (glycerin M). Got.
• ⁇ Dispersant Production Example 13> The autoclave was charged with 92.1 g of glycerin and 1.4 g (1.5 wt%) of KOH, and dehydrated at 110 ° C. and 1.3 kPa for 30 minutes. After dehydration, the air in the autoclave was replaced with nitrogen, the temperature in the autoclave was raised to 130 ° C., and 88.1 g of ethylene oxide was charged. After addition reaction and aging at 130 ° C., the mixture was cooled to 80 ° C., and unreacted ethylene oxide in the autoclave was removed at 4.0 kPa for 30 minutes. After removing unreacted ethylene oxide, 581.0 g of propylene oxide was charged.
• ⁇ Dispersant Production Example 16> The autoclave was charged with 166.2 g of diglycerin and 2.0 g of KOH, and dehydrated at 110 ° C. and 1.3 kPa for 30 minutes. After dehydration, the air in the autoclave was replaced with nitrogen, the temperature in the autoclave was raised to 130 ° C., and 88.1 g of ethylene oxide was charged. After addition reaction and aging at 130 ° C., the mixture was cooled to 80 ° C., and unreacted ethylene oxide in the autoclave was removed at 4.0 kPa for 30 minutes. After removing unreacted ethylene oxide, 116.2 g of propylene oxide was then charged.
• ⁇ Evaluation method> ⁇ Weight average molecular weight> The weight average molecular weight was measured in terms of standard polyethylene by gel permeation chromatography.
• Measurement condition Gel filtration chromatograph SC-8020 series build-up system manufactured by Tosoh Corporation Column: G2000HXL + G4000HXL Detector: UV220nm Carrier: Tetrahydrofuran 1mL / min Column temperature: 38 ° C ⁇ Particle size of oil droplet> About 0.03 ml (one drop with a Pasteur pipette) of the alkaline detergent composition for each steel plate was dropped on a slide glass, and a photograph was taken at 200 times magnification using an optical microscope (manufactured by NIKON).
• the diameter of the oil droplet with the largest particle size was measured with a ruler to obtain the maximum particle size.
• the maximum particle size is less than 50 ⁇ m, the storage stability is excellent.
• Tables 1 to 7 when separation or precipitation was observed and the particle size was not measured, “-” was indicated.
• ⁇ State> The alkaline detergent composition for each steel plate was placed in a transparent polypropylene bottle having a capacity of 500 ml and stored at room temperature (20 ° C. to 25 ° C.) for 24 hours, and the appearance of the alkaline detergent composition for each steel plate was visually observed. And the presence or absence of upper layer separation, thickening, solidification, etc. was evaluated. When no abnormality was found, “OK” was set. When an abnormality was found, the state (separation, bubbles, precipitation, etc.) is shown in Tables 1 to 7.
• ⁇ Electricity> The outlet of the motor of the stirrer was connected to a voltage detector and measured. The electric energy (kw / kg) was calculated by the effective voltage (V) ⁇ the effective current (A) ⁇ the power factor (PF) displayed by the voltage detector.
• the evaluation results are shown in Tables 1-7.
• the numerical values in the table are the content (% by weight) of each component in the cleaning agent, the D / C weight ratio is the weight ratio of the slurrying agent (D) / nonionic surfactant (C) content, E / C weight ratio shows weight ratio of content of a dispersing agent (E) and nonionic surfactant (C).
• Examples 56 to 59, Comparative Examples 33 to 35> The mixture was prepared in the same manner as in Example 1 except that the components and amounts shown in Table 8 were used.
• the unit of the blending amount shown in Table 7 is% by weight. This mixture was stirred with a stirring device having a stirring blade (four pitched paddles, diameter: 80 mm, blade height 200 ml position of beaker) under the stirring conditions shown in Table 7 to obtain an alkaline detergent composition for steel sheet. It was.
• Step (1) As a chelating agent, 50.4 g (6.3% by weight) of sodium gluconate and 78.7 g (9.8% by weight) of water are put into a glass tall beaker (inner diameter 92.6 mm) having a capacity of 1000 ml. A chelating agent aqueous solution was prepared. Subsequently, 8.0 g (1.0% by weight) of polyoxyethylene (10 mol addition) polyoxypropylene (2 mol addition) lauryl myristyl secondary ether as a nonionic surfactant, and isotridecyl alcohol as an antifoaming agent 4.
• Step (2) This mixture was stirred at 630 rpm for 120 minutes with a stirrer having a stirring blade (4 pitched paddles, diameter: 80 mm, blade height 300 ml of beaker) to obtain an alkaline cleaning composition for steel sheet. It was. The peripheral speed is 0.84 m / s.
• Step (1) As a chelating agent, 126.0 g (6.3 wt%) of sodium gluconate and 196.8 g (9.8 wt%) of water are put in a glass beaker (inner diameter 130 mm) having a capacity of 2000 ml and chelated. An aqueous agent solution was prepared. Subsequently, 20.0 g (1.0% by weight) of polyoxyethylene (10 mol addition) polyoxypropylene (2 mol addition) lauryl myristyl secondary ether as a nonionic surfactant, and isotridecyl alcohol 10.
• Step (2) This mixture was stirred at 770 rpm for 120 minutes with a stirrer having a stirring blade (4 pitched paddles, diameter: 80 mm, blade height 750 ml position of beaker) to obtain an alkaline cleaning composition for steel sheet. It was. The peripheral speed is 1.03 m / s.
• a chelating agent 126.0 g (6.3% by weight) of sodium gluconate and 196.8 g (9.8% by weight) of water were placed in a glass beaker having a capacity of 2000 ml to prepare an aqueous chelating agent solution. Next, 60.0 g of sodium polyacrylate (solid content 42%) as a slurrying agent was stirred and mixed, and 1579.2 g (NaOH) of 48% sodium hydroxide as an alkaline agent was further mixed.
• nonionic surfactant polyoxyethylene (10 mol addition) polyoxypropylene (2 mol addition) lauryl myristyl secondary ether 20.0 g (1.0 wt%), antifoaming agent
• polyoxyethylene (10 mol addition) polyoxypropylene (2 mol addition) lauryl myristyl secondary ether 20.0 g (1.0 wt%), antifoaming agent As a steel plate, 10.0 g (0.5% by weight) of isotridecyl alcohol and 8.0 g (0.4% by weight) of ethylethanolamine as a dispersing agent are added and stirred uniformly with high shear force (homomixer: 10,000 rpm). An alkaline detergent composition was obtained.
• ⁇ Evaluation method> ⁇ Particle size of oil droplet> The maximum particle size was measured by the same method as the measurement of the particle size of the oil droplet of Example 1. When the maximum particle size is less than 50 ⁇ m, the storage stability is excellent.
• the steel sheet alkaline detergent composition was placed in a gallusac type specific gravity bottle defined in JIS R 3503, and the specific gravity was measured at 30 ° C. by the method of JIS K 0061.
• the alkaline detergent composition for a steel sheet involves air bubbles during preparation, the storage stability tends to decrease.
• the specific gravity of the alkaline detergent composition for steel sheet decreases, so it is desirable that the specific gravity does not decrease.
• the evaluation results are shown in Table 8.
• the numerical values in the table are the content (% by weight) of each component in the cleaning agent, the D / C weight ratio is the weight ratio of the slurrying agent (D) / nonionic surfactant (C) content, E / C weight ratio shows weight ratio of content of a dispersing agent (E) and nonionic surfactant (C).
• the target particle size can be obtained if the peripheral speed during stirring is produced at 1.03 m / s.
• the entrainment of air bubbles is large, the specific gravity is decreased, and the stability is improved. I can't get it.
• the alkaline detergent composition for steel sheet according to the example can suppress the entrainment of bubbles even when the peripheral speed during stirring is increased, and can produce a stable alkaline detergent composition for steel sheet.
• the peripheral speed was higher than that in Example 60 and Comparative Example 36, the amount of power was small. This is because a vortex is formed by stirring and the stirring blade is exposed on the liquid surface.
• Step 3 The alkaline detergent composition for steel plate of Example 59 and the alkaline detergent composition for steel plate of Reference Example 2 were stored at 30 ° C. for 30 days.
• Step 4 After the storage, the alkaline detergent composition for steel plate of Example 59 and the alkaline detergent composition for steel plate of Reference Example 2 were stirred and further diluted 25 times with water, respectively, for the second steel plate. An alkaline detergent composition was prepared.
• the amount of adhered oil remaining on the surface of the steel sheet after the cleaning test (the amount of remaining adhered oil) was measured using a steel sheet adhered oil amount measuring device EMIA-111 (manufactured by Horiba, Ltd.).
• the measured value is an average value of five measurements. It represents that the smaller the amount of residual adhered oil, the better the cleaning performance of the steel sheet.
• the amount of residual adhered oil when washed with the second alkaline detergent composition for steel sheet prepared from the alkaline detergent composition for steel sheet of Example 59 was 15.7 mg / m 2 .
• the amount of residual adhered oil when washed with the second alkaline detergent composition for steel sheet prepared from the alkaline detergent composition for steel sheet is equivalent to 14.1 mg / m 2 , both of which are excellent cleaning for steel sheet Had sex.

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