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
  • C11D1/83—Mixtures of non-ionic with anionic compounds
• • 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
  • C11D3/37—Polymers
  • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/3707—Polyethers, e.g. polyalkyleneoxides
• • 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
  • C11D3/43—Solvents
• • 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
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/28—Sulfonation products derived from fatty acids or their derivatives, e.g. esters, amides
• • 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
• • 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
  • C11D3/2006—Monohydric alcohols
  • C11D3/201—Monohydric alcohols linear
• • 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
  • C11D3/2044—Dihydric alcohols linear
• • 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

Definitions

• the present invention relates to a liquid detergent composition.
• Priority is claimed on Japanese Patent Application No. 2009-238354, filed October 15, 2009 , the amount of which is incorporated herein by reference.
• Patent Document 1 discloses a liquid detergent composition using both primary alcohol ethoxylate and secondary alcohol ethoxylate to which ethyleneoxide and propyleneoxide are added as a nonionic surfactant.
• Patent Document 2 discloses a surfactant composition which can be easily applied to a liquid detergent composition including 35 to 80 % by mass of ⁇ -sulfo fatty acid alkyl ester salt as an anionic surfactant and alcohol with a carbon number of 6 to 22 .
• a liquid detergent composition using primary alcohol ethoxylate as a nonionic surfactant has attracted attention, in that it has great sebum detergency and has low cost and superior versatility.
• a surfactant is apt to form a high-viscosity higher-order association structure such as hexagonal liquid crystal in a high-concentration region and the primary alcohol ethoxylate forms a high-viscosity liquid crystal phase in a relatively high-concentration region when the concentration thereof is equal to or higher than 40 % by mass.
• the primary alcohol ethoxylate since the primary alcohol ethoxylate has a large high-viscosity region, the primary alcohol ethoxylate is apt to increase in viscosity with an increase in concentration and it is thus difficult to obtain a concentrated liquid detergent composition into which 40 % by mass or more of the primary alcohol ethoxylate is mixed. Moreover, when the liquid detergent composition includes the primary alcohol ethoxylate at a high concentration, the solubility thereof is apt to decrease in a washing bath. Particularly, when the washing is performed with low-temperature water in winter, there is a problem in that gel-like attachments are apt to remain on clothes at the end of washing.
• Patent Document 3 discloses a high-concentration anionic surfactant water-based paste including primary alcohol ethoxylate, 50 to 80 % by mass of an anionic surfactant (such as an ⁇ -sulfo fatty acid ester salt), and polyethylene glycol with an average molecular weight of 200 to 800 so as to contain the anionic surfactant at a high concentration and to suppress a daily increase in viscosity.
• Patent Document 4 discloses a clothing liquid detergent composition including primary alcohol ethoxylate and polyoxyalkylene amine so as to exhibit high detergency at a low concentration.
• Patent Document 5 discloses a liquid detergent composition using both primary alcohol ethoxylate and an anionic surfactant such as alkyl benzene sulfonate (LAS) or sulfate ester salt of polyoxyethylene alkyl ether (AES).
• Patent Documents 6 and 7 disclose a concentrated liquid detergent composition including primary alcohol ethoxylate and an anionic surfactant such as ⁇ -sulfo fatty acid derivatives or sulfonation products of polyalkylene glycol monomethyl ether unsaturated fatty acid ester or salts thereof.
• the detergency for a sebum stain is not satisfactory.
• the high-concentration anionic surfactant water-based paste disclosed in Patent Document 3 serves to improve the fluidity when including the anionic surfactant at a high concentration (50 % by mass or more), but does not satisfy preservation stability at a low temperature (at about 5°C), low-temperature solubility (at about 15°C), and sebum detergency.
• the viscosity may increase during preservation at a low temperature.
• the liquid detergent composition disclosed in Patent Document 5 contains 30 % by mass or more of LAS or AES and thus cannot be said to be an environmentally-friendly composition.
• the synthesis of an anionic surfactant may require a high cost and thus is not satisfactory in cost or versatility. It is also inferior in biodegradability.
• the invention is made in consideration of the above-mentioned problems and an object thereof is to provide a liquid detergent composition which includes a surfactant at a high concentration and which has superior low-temperature preservation stability and superior low-temperature solubility and sebum detergency during washing.
• the inventors actively studied and finally found that it is possible to mix a surfactant at a high concentration without decreasing the low-temperature solubility while suppressing an increase in viscosity by mixing a primary alcohol ethoxylate and a specific anionic surfactant at a specific amount and using two or more species of specific hydrotropic agents. Moreover, since the low-temperature solubility can be retained, the inventors found that it is not necessary to mix the hydrotropic agent at a high concentration and it is possible to satisfactorily mix the functional components such as an enzyme and a chelating agent, and realized the invention.
• R 1 represents a straight-chain alkyl group with a carbon number of 10 to 22
• R 2 represents a straight-chain or branched-chain alkyl group with a carbon number of 9 to 14 or a straight-chain or branched-chain alkenyl group with a carbon number of 9 to 16
• R 3 represents a straight-chain or branched-chain alkyl group with a carbon number of 1 to 3
• R 4 represents a straight-chain or branched-chain alkyl group with a carbon number of 9 to 14 or a straight-chain or branched-chain alkenyl group with a carbon number of 9 to 16
• R 5 represents a hydrogen or a straight-chain or branched-chain alkyl group with a carbon number of 1 to 3 which may have a hydroxyl group
• M 1 and M 2 each identically or differently represents alkali metal, alkaline-earth metal, protonated primary to tertiary amines or ammonium with a total carbon number of 1 to
• Another aspect of the invention relates to the liquid detergent composition, wherein the component (C) includes at least ethanol.
• Yet another aspect of the invention relates to the liquid detergent composition, wherein the component (C) includes at least ethanol and polyethylene glycol with an average molecular weight of 570 to 1050.
• Yet another aspect of the invention relates to the liquid detergent composition, wherein the amount of the component (A) is in the range of 20 to 60 % by mass, the amount of the component (B) is in the range of 4 to 45 % by mass, and the amount of the component (C) is in the range of 2 to 20 % by mass.
• the liquid detergent composition according to the invention includes a surfactant at a high concentration and has superior low-temperature preservation stability and superior low-temperature solubility and sebum detergency during washing.
• a liquid detergent composition according to the invention includes components (A) to (C) described below.
• a component (A) is a nonionic surfactant represented by the following formula (1) R 1 O(CH 2 CH 2 O) n H (1)
• R 1 represents a straight-chain alkyl group with a carbon number of 10 to 22. Since the alkyl group has a straight-chain shape, detergency is enhanced. Since the carbon number of the alkyl group is equal to or greater than 10, sebum detergency is enhanced. Since the carbon number of the alkyl group is equal to or less than 22, low-temperature preservation stability and low-temperature solubility during washing is improved. The carbon number of the alkyl group is preferably in the range of 10 to 20 and more preferably in the range of 10 to 18.
• R 1 originates from alcohol (R 1 -OH) which is a source material. Examples of the alcohol include primary higher alcohol, higher fatty acid, and higher fatty acid amide. Specific examples of the alkyl group of R 1 include decyl, undecyl, dodecyl, tridecyl, tetradecyl, hexadecyl, stearyl, and icosyl.
• n represents an average mol number of ethyleneoxide added. n is in the range of 5 to 20, preferably in the range of 8 to 18, and more preferably in the range of 10 to 16. When n is in the above-mentioned range, the sebum detergency is enhanced.
• the mol number distribution of ethyleneoxide added is not particularly limited.
• the added mol number distribution varies depending on the reaction method of producing the component (A). For example, when ethyleneoxide is added to a hydrophobic material using a general alkali catalyst such as sodium hydroxide or potassium hydroxide, a relatively wide distribution is apt to be obtained.
• component (A) examples include components obtained by adding ethyleneoxide to natural alcohol such as product name "CO-1214" or “CO-1270” made by P & G Co. so that the average added mol number was 12 moles or 15 moles.
• the examples of the component (A) may be used alone or in combination of two or more species.
• a component (B) is at least one species of anionic surfactant selected from the group consisting of compounds represented by the following formulas (2) and (3).
• R 2 represents a straight-chain or branched-chain alkyl group with a carbon number of 9 to 14 or a straight-chain or branched-chain alkenyl group with a carbon number of 9 to 16. Since the carbon number of the alkyl group is equal to or greater than 9, the sebum detergency is enhanced. When the carbon number is equal to or less than 14, the precipitation in the preservation at a low temperature can be suppressed. From the viewpoint of an increase in sebum detergency or prevention of viscosity at a low temperature, the carbon number of the alkyl group is preferably in the range of 10 to 14 and more preferably in the range of 10 to 12. On the other hand, the carbon number of the alkenyl group is preferably in the range of 10 to 16 and more preferably in the range of 10 to 12.
• R 3 represents a straight-chain or branched-chain alkyl group with a carbon number of 1 to 3. Since the carbon number of the alkyl group is equal to or greater than 1, the precipitation at a low temperature can be suppressed. Since the carbon number is equal to or less than 3, the low-temperature solubility during washing is improved.
• the carbon number of the alkyl group is preferably in the range of 1 to 2.
• M 1 represents a counter ion and forms a water-soluble salt along with R 2 CH(COOR 3 )SO 3 - .
• Examples thereof include alkali metal, alkaline-earth metal, protonated primary to tertiary amines or ammonium with a total carbon number of 1 to 6 which may have a hydroxyl group.
• the alkali metal and the alkaline-earth metal can be present as cations and the number of atoms coupled to R 2 CH(COOR 3 )SO 3 - varies depending on the valence of the cations.
• Examples of the alkali metal include sodium and potassium.
• Examples of the alkaline-earth metal include calcium.
• the protonated primary to tertiary amines with a total carbon number of 1 to 6 may have a hydroxyl group or may not have a hydroxyl group. From the viewpoint of improvement of the low-temperature solubility at a low temperature, it is preferable that they have a hydroxyl group.
• the primary to tertiary amines include alkanolamine. Specific examples thereof include monoethanolamine, diethanolamine, and triethanolamine. Sodium, monoethanolamine, and triethanolamine can be preferably used as M 1 .
• Examples of the compound represented by the formula (2) include ⁇ -sulfo fatty acid ester salt (MES). Specific examples thereof include ⁇ -sulfolauric methyl ester monoethanolamine salt, ⁇ -sulfolauric methyl ester sodium salt, and ⁇ -sulfopalmitic methyl ester monoethanolamine salt.
• MES ⁇ -sulfo fatty acid ester salt
• Specific examples thereof include ⁇ -sulfolauric methyl ester monoethanolamine salt, ⁇ -sulfolauric methyl ester sodium salt, and ⁇ -sulfopalmitic methyl ester monoethanolamine salt.
• the compounds represented by the formula (2) may be used alone or in combination of two or more species thereof.
• R 4 represents a straight-chain or branched-chain alkyl group with a carbon number of 9 to 14 or a straight-chain or branched-chain alkenyl group with a carbon number of 9 to 16. Since the carbon number of the alkyl group is equal to or greater than 9, the sebum detergency is enhanced. When the carbon number is equal to or less than 14, the precipitation in the preservation at a low temperature can be suppressed. From the viewpoint of prevention of an increase in sebum detergency or viscosity at a low temperature, the carbon number of the alkyl group is preferably in the range of 10 to 14 and more preferably in the range of 12 to 14.
• the carbon number of the alkenyl group is preferably in the range of 10 to 16 and more preferably in the range of 12 to 16.
• R 2 and R 4 may be identical to or different from each other.
• Specific examples of the alkyl group of R 2 include nonyl, secondary nonyl, decyl, secondary decyl, undecyl, secondary undecyl, dodecyl, secondary dodecyl, tridecyl, isotridecyl, secondary tridecyl, tetradecyl, and secondary tetradecyl.
• alkenyl group of R 2 include nonenyl, decenyl, undecenyl, dodecenyl, and tetradecenyl.
• alkyl group of R 4 include nonyl, secondary nonyl, decyl, secondary decyl, undecyl, secondary undecyl, dodecyl, secondary dodecyl, tridecyl, isotridecyl, secondary tridecyl, tetradecyl, and secondary tetradecyl.
• alkenyl group of R 4 include nonenyl, decenyl, undecenyl, dodecenyl, and tetradecenyl.
• R 5 represents hydrogen or a straight-chain or branched-chain alkyl group with a carbon number of 1 to 3 which may have a hydroxyl group. Since the carbon number of the alkyl group is equal to or greater than 1, the precipitation at a low temperature can be suppressed. Since the carbon number is equal to or less than 3, the low-temperature solubility during washing is improved.
• the carbon number of the alkyl group is preferably in the range of 2 to 3.
• the alkyl group may have one or more hydroxyl groups or may not. From the viewpoint of improvement of the low-temperature solubility at a low temperature, it is preferable that the alkyl group have a hydroxyl group.
• the straight-chain alkyl group is more excellent in low-temperature preservation stability than the branched-chain alkyl group.
• M 2 represents a counter ion and forms a water-soluble salt along with R 4 CH(COOR 5 )SO 3 - .
• Examples thereof include alkali metal, alkaline-earth metal, protonated primary to tertiary amines or ammonium with a total carbon number of 1 to 6 which may have a hydroxyl group.
• the alkali metal and the alkaline-earth metal can be present as cations and the number of atoms coupled to R 4 CH(COOR 5 )SO 3 - varies depending on the valence of the cations.
• Examples of the alkali metal include sodium and potassium.
• Examples of the alkaline-earth metal include calcium.
• the protonated primary to tertiary amines with a total carbon number of 1 to 6 may or may not have a hydroxyl group. From the viewpoint of improvement of the low-temperature solubility at a low temperature, it is preferable that they have a hydroxyl group.
• the primary to tertiary amines include alkanolamine. Specific examples thereof include monoethanolamine, diethanolamine, triethanolamine and the like. Sodium, monoethanolamine, and triethanolamine can be preferably used as M 2 . M 1 and M 2 may be identical to or different from each other.
• Examples of the compound represented by the formula (3) include derivatives of ⁇ -sulfo fatty acid ester salt. Specific examples thereof include ⁇ -sulfolauric monoethanolamide sodium salt and ⁇ -sulfolauric isopropanolamide sodium salt.
• the compounds represented by the formula (3) may be used alone or in combination of two or more species thereof.
• the compounds represented by the formula (2) may be used, the compounds represented by the formula (3) may be used, or they may be used together, but the compounds represented by the formula (3) can be preferably used.
• the compounds represented by the formula (3) are more bulky in molecular structure than the compounds represented by the formula (2) (that is, the steric hindrance is larger). As the steric hindrance becomes larger, the formation of a liquid crystal phase is more apt to be prevented. Accordingly, it is possible to suppress the increase in viscosity even when a surfactant is included with a high concentration.
• the component (A) is blended into the liquid detergent composition according to the invention for the purpose of imparting detergency (particularly, sebum detergency).
• the component (B) has a function of preventing the formation of a liquid crystal phase, and is superior in water solubility because it is a salt. Therefore, in the liquid detergent composition according to the invention, since the increase in viscosity is suppressed by using the component (A) and the component (B) together, the liquid detergent composition can include the surfactant at a high concentration and is thus superior in sebum detergency. In addition, since the liquid detergent composition is not easily gelated in spite of the dilution with water during washing, it is possible to effectively exhibit excellent sebum detergency.
• the liquid detergent composition includes the component (A) but does not include the component (B) and the liquid detergent composition is input to a washing machine, gelation may be caused and the liquid detergent composition may not be easily dissolved in water, thereby not exhibiting satisfactory sebum detergency.
• the liquid detergent composition does not include the component (A) but includes the component (B) at a high concentration, precipitates insoluble in water can be easily generated, thereby degrading the low-temperature preservation stability or the low-temperature solubility. The degradation in solubility is remarkable particularly when low-temperature water is used in winter or the like.
• the amount of the component (A) is preferably in the range of 20 to 60 % by mass with respect to 100 % by mass of the liquid detergent composition, more preferably in the range of 25 to 55 % by mass, and still more preferably in the range of 30 to 45 % by mass.
• the amount of the component (A) is equal to or greater than 20 % by mass, superior sebum detergency can be imparted to the liquid detergent composition.
• the amount of the component (A) is equal to or less than 60 % by mass, it is possible to maintain good solubility and low-temperature preservation stability of the liquid detergent composition.
• the amount of the component (B) is preferably in the range of 4 to 45 % by mass with respect to 100 % by mass of the liquid detergent composition, more preferably in the range of 9 to 40 % by mass, and still more preferably in the range of 10 to 35 % by mass.
• the amount of the component (B) is equal to or greater than 4 % by mass, it is possible to suppress the increase in viscosity at a low temperature and thus to impart the preservation stability (particularly, low-temperature preservation stability) and the solubility to the liquid detergent composition.
• the amount of the component (B) is equal to or less than 45 % by mass, it is possible to maintain good sebum detergency of the liquid detergent composition.
• the total amount of the component (A) and the component (B) is in the range of 40 to 75 % by mass with respect to 100 % by mass of the liquid detergent composition.
• the total amount is preferably in the range of 45 to 70 % by mass and more preferably in the range of 50 to 65 % by mass.
• the total amount is equal to or greater than 40 % by mass, it is possible to impart the sebum detergency to the liquid detergent composition and thus to satisfactorily exhibit the function of a concentrated liquid detergent.
• the total amount is equal to or less than 75 % by mass, it is possible to maintain good low-temperature preservation stability of the liquid detergent composition.
• the mass ratio of the amount of the component (B) to the total amount of the component (A) and the component (B) is in the above-mentioned range, it is possible to impart the low-temperature preservation stability, the low-temperature solubility, and the sebum detergency to the liquid detergent composition.
• the ratio of the component (B) is excessively low, the low-temperature solubility of the liquid detergent composition is lowered.
• the ratio of the component (B) is excessively high, the sebum detergency of the liquid detergent composition is lowered.
• the mass ratio of the amount of the component (B) to the total amount of the component (A) and the component (B) is in the above-mentioned range but the total amount of the component (A) and the component (B) is greater than 75 % by mass, the fluidity or the low-temperature fluidity may be lowered.
• a component (C) includes at least two species of water-miscible solvents selected from the group consisting of methanol, ethanol, propanol, butanol, ethylene glycol, propylene glycol, butylene glycol, butyl carbitol, phenoxy ethanol, and polyethylene glycol with an average molecular weight of 570 to 3800.
• the component (C) serves as a hydrotropic agent imparting the low-temperature preservation stability and the low-temperature solubility to the liquid detergent composition. However, when one species of solvent described above is used alone, the liquid detergent composition is not easily soluble in water.
• the ratio of the component (C) When it is intended to enhance the solubility of the liquid detergent composition, the ratio of the component (C) has only to be raised, but the ratio of the surfactant may be lowered as much, or it is difficult to blend the functional components such as an enzyme or a chelating agent as much.
• the functional components such as an enzyme or a chelating agent as much.
• two or more species of solvents are together used as the component (C)
• it is not necessary to raise the ratio of the component (C) it is possible to blend a satisfactory amount of functional components without lowering the ratio of the surfactant.
• the combination of solvents used as the component (C) is not particularly limited, but it is preferable that at least ethanol be used from the viewpoint that it is easy to prevent the formation of a liquid crystal phase and it is easy to prevent microorganisms from reproducing.
• ethanol it is possible to further enhance the low-temperature solubility or the low-temperature preservation stability.
• one or more species of methanol, ethanol, propanol, butanol, and phenoxy ethanol which are classified into monohydric alcohol and one or more species of ethylene glycol, propylene glycol, butylene glycol, butyl carbitol, and polyethylene glycol which are classified into polyhydric alcohol can be combined for use.
• phenoxy ethanol can be preferably used in addition to ethanol.
• polyhydric alcohols ethylene glycol, polyethylene glycol, and propylene glycol can be preferably used.
• polyethylene glycol with an average molecular weight of 570 to 3800 can be more preferably used.
• the average molecular weight is more preferably in the range of 570 to 1050 and still more preferably in the range of 950 to 1050.
• the average molecular weight means the average molecular weight described in Japanese Standards of Quasi-drug Ingredients 2006.
• Examples of polyethylene glycol with an average molecular weight of 570 to 3800 include Polyethylene Glycol 600 (with an average molecular weight of 570 to 630), Polyethylene Glycol 1000 (with an average molecular weight of 950 to 1050), Polyethylene Glycol 2000 (with an average molecular weight of 1850 to 2150), and Polyethylene Glycol 4000 (with an average molecular weight of 2600 to 3800).
• # may be interposed between polyethylene glycol and a numerical value.
• the combination of ethanol and polyethylene glycol with an average molecular weight of 570 to 1050 can be preferably used and the combination of ethanol and polyethylene glycol with an average molecular weight of 950 to 1050 can be more preferably used.
• the amount of the component (C) is preferably in the range of 2 to 20 % by mass with respect to 100 % by mass of the liquid detergent composition and more preferably in the range of 2 to 15 % by mass.
• the amount of the component (C) is equal to or greater than 2 % by mass, the low-temperature preservation stability and the low-temperature solubility can be imparted to the liquid detergent composition.
• the amount of the component (C) is equal to or less than 20 % by mass, a satisfactory amount of optional components can be blended into the liquid detergent composition.
• ethanol used as the component (C)
• the amount thereof is preferably in the range of 3 to 10 % by mass with respect to 100 % by mass of the liquid detergent composition.
• polyethylene glycol is used as the component (C)
• the amount thereof is preferably in the range of 2 to 8 % by mass with respect to 100 % by mass of the liquid detergent composition.
• the liquid detergent composition according to the invention includes components (A) to (C) described above as essential components, and may include only components (A) to (C) or may further include water, other surfactants other than components (A) to (B), and other components if necessary without damaging the advantageous effect of the invention.
• the liquid detergent composition according to the invention include water, from the viewpoint of easy preparation, preservation stability, and solubility in water.
• the amount of water is preferably in the range of 15 to 50 % by mass with respect to 100 % by mass of the liquid detergent composition and more preferably in the range of 20 to 45 % by mass.
• nonionic surfactants other than the component (A) examples include nonionic surfactants other than the component (A), anionic surfactants other than the component (B), cationic surfactants, and amphoteric surfactants.
• nonionic surfactants other than the component (A) include alkylphenol, alkyleneoxide adduct of higher fatty acid, higher amine, or the like, polyoxyethylene polyoxypropylene block copolymer, fatty acid alkanolamine, fatty acid alkanolamide, polyhydric alcohol fatty acid ester or alkyleneoxide adduct thereof, polyhydric alcohol fatty acid ester, alkyl (or alkenyl)amine oxide, alkyleneoxide adduct of hydrogenated castor oil, saccharide fatty acid ester, N-alkylpolyhydroxy fatty acid amide, and alkyl glycoside.
• anionic surfactant other than the component (B) examples include carboxylic acid type anionic surfactants such as straight-chain alkyl benzene sulfuric acid or salt thereof, ⁇ -olefin sulfonate, straight-chain or branched-chain alkyl ester sulfonate, alkyl ether ester sulfonate or alkenyl ether ester sulfonate, alkane sulfonate having an alkyl group, higher fatty acid salt, alkyl ether carboxylate, polyoxyalkylene ether carboxylate, alkyl (or alkenyl)amide ether carboxylate, and acylamino carboxylate, and ester phosphate type anionic surfactants such as alkyl ester phosphate, polyoxyalkylene alkyl ester phosphate, polyoxyalkylene alkyl phenyl ester phosphate, and glycerin fatty acid ester monoester phosphate.
• Examples of the cationic surfactant include anionic surfactants such as alkyltrimethylammonium salt, dialkyldimethylammonium salt, alkylbenzyl dimethylammonium salt, and alkylpyridinium salt.
• Examples of the amphoteric surfactant include amphoteric surfactants such as alky betaine type, alkylamide betaine type, imidazoline type, alkylamino sulfone type, alkylamino carboxylate type, alkylamide carboxylate type, amideamino acid type, and phosphate type.
• the liquid detergent composition according to the invention can include an enzyme typically used in clothing liquid detergent compositions.
• the enzyme include commercially-available lipase (lipase preparation) such as Production Names "Liquanase”, “Savinase”, “Alcalase”, “Everlase”, “Kannase”, and “Esperaze”, made by Novozymes Inc.; Product Name “API 21” made by Showa Denko K.K.; product Names “Maxtaze”, “Maxacal”, “Purafect”, “Maxapem”, and “Properase” made by Genencor International Inc.; Product Name “KAP” made by Kao Corporation; Product Names "Protease K-14” and “Protease K-16” described in JP-A-5-25492 ; Product Names “Termamyl”, “Duramyl”, “Stainzyme”, and “Promozyme 200L” made by Novozymes Inc.; Product Name "Maxa
• the amount of the enzyme is preferably in the range of 0.1 to 3 % by mass with respect to 100 % by mass of the liquid detergent composition.
• the amount of the enzyme is equal to or greater than 0.1 % by mass, the detergency for various stains (particularly, the detergency for oily stains such as a sebum stain) is improved.
• the amount of the enzyme is equal to or less than 3 % by mass, the detergency for various stains can be easily obtained, which is economically advantageous.
• the liquid detergent composition according to the invention may have a viscosity reducer such as paratoluene sulfonic acid, benzoate (which also serves as an antiseptic agent), and urea and a solubilizer, for example, by 0.01 to 15 % by mass.
• the liquid detergent composition according to the invention may include a metal ion scavenger such as a malonic acid, a succinic acid, a malic acid, a diglycol acid, a tartaric acid, and a citric acid, for example, by 0. 1 to 20 % by mass.
• the liquid detergent composition according to the invention may include an antioxidant such as butylhydroxy toluene, distyrenated cresol, sodium sulfite, and sodium hydrogen sulfite, for example, by 0.01 to 2 % by mass.
• the liquid detergent composition according to the invention may include an antiseptic agent such as Product Name "Kathon CG" made by Rohm and Haas Co., for example, by 0.001 to 1 % by mass.
• the liquid detergent composition according to the invention may include a flexibilizer or a texture improver, an alkali builder such as alkanolamine, a pH control agent, a hydrotropic agent other than the component (C), a fluorescent agent, a migration-proofing agent, an anti-soil redeposition agent, a pearl agent, and a soil-release agent, for the purpose of improvement of the detergency or stability.
• the flexibilizer examples include long-chain aliphatic amide alkyl tertiary amines such as caprylic dimethylaminopropylamide, caprylic dimethylaminopropylamide, lauric dimethylaminopropylamide, myristic dimethylaminopropylamide, palmitic dimethylaminopropylamide, stearic dimethylaminopropylamide, behenic dimethylaminopropylamide, and oleic dimethylaminopropylamide or salts thereof; palmitic diethanolaminopropylamide; and stearic diethanolaminopropylamide.
• long-chain aliphatic amide alkyl tertiary amines such as caprylic dimethylaminopropylamide, caprylic dimethylaminopropylamide, lauric dimethylaminopropylamide, myristic dimethylaminopropylamide, palmitic dimethylaminopropylamide
• the liquid detergent composition according to the invention may include stearic dimethylaminopropylamide by 1 to 5 % by mass.
• the texture improver include polyether-modified silicones such as Product Names "CF1188HV”, “SH3748”, “SH3794”, “SH3772M”, “SH3775M”, “SF8410”, “SH8700”, “BY22-008”, “BY22-012”, “SILWET L-7001", “SILWET L-7002", “SILWET L-7602", “SILWET L-7604", "SILWET FZ-2104", “SILWET FZ-2120", “SILWET FZ-2161”, “SILWET FZ-2162”, “SILWET FZ-2164", “SILWET FZ-2171”, “ABN SILWET FZ-F1-009-01”, “ABN SILWET FZ-F1-009-02”, “ABN SILWET FZ-F1-009-03", “ABN SILWET FZ-F1-0
• the liquid detergent composition according to the invention may include an aromatizer, a colorant or an emulsifier, and a natural material for the purpose of improvement in added value of products.
• a representative example of the aromatizer is a perfume composition described in JP-A-2002-146399 .
• a preferable blending amount thereof is in the range of 0.1 to 1 % by mass.
• General-purpose paints or pigments such as "Acid Red 138", “Polar Red RLS”, “Acid Yellow 203”, “Acid Blue 9", “Blue No. 1", “Blue No. 205", “Green No. 3", and “Turquoise P-GR" (all of which are product names) can be included, for example, by 0.00005 to 0.005 % by mass as the colorant.
• emulsifier examples include polystyrene emulsion and polyvinyl acetate emulsion.
• An emulsion with a solid content of 30 to 50 % by mass can be typically suitably used.
• Product Name "Saibinol RPX-196 PE-3 with solid content of 40 % by mass” made by Saiden Chemical Industry Co., Ltd. can be added thereto by 0.01 to 0.5 % by mass.
• Examples of an extract of the natural material include plants such as Maackia amurensis, Arctostaphylos uva-ursi), Echinacea, Scutellaria baicalensis, Phellodendron amurense, Coptis japonica, allspice, oregano, Styphnolobiumjaponicum, Matricaria chamomilla L., Lonicera japonica, Sophora flavescens, Schizonepeta tenuifolia, cinnamon, laurel, Magnolia hypoleuca, burdock, comfrey, Torilis japonica seed, great burnet, Paeonia lactiflora, ginger, Solidago altissima, Sambucus nigra, common sage, European mistletoe, Atractylodes lancea, thyme, Anemarrhena asphodeloides, clove tree, Citrus unshiu, tea tree, barberry, Houttuynia cordata, Nan
• the pH is preferably in the range of 4 to 9 at 25°C and more preferably in the range of 4 to 8.
• the pH of the liquid detergent composition can be adjusted by the use of the pH control agent.
• the pH control agent include inorganic acids such as a hydrochloric acid, a sulfuric acid, a phosphoric acid; organic acids such as polyvalent carboxylic acids and hydroxyl carboxylic acids; sodium hydroxide; potassium hydroxide; alkanolamine; and ammonia.
• the sulfuric acid, the sodium hydroxide, the potassium hydroxide, and the alkanolamine can be preferably used from the viewpoint of temporal stability of the liquid detergent composition.
• the pH control agents can be used alone or in combination of two or more species.
• the inorganic acid (preferably the hydrochloric acid or the sulfuric acid) or the potassium hydroxide can be added thereto for fine adjustment of the pH of the liquid detergent composition.
• the pH (the pH at 25°C) of the liquid detergent composition is a value measured through the use of a pH meter (product name "HM-30G", made by DKK-Toa Corporation).
• the viscosity at 25°C is preferably in the range of 40 to 150 mPa ⁇ s and more preferably in the range of 50 to 130 mPa ⁇ s.
• the pickup cup is small and thus the picked-up quantity (used quantity) is small. Accordingly, when the liquid detergent does not have appropriate viscosity, it is difficult to measure a desired quantity of the liquid detergent.
• the viscosity is equal to or greater than 40 mPa ⁇ s, appropriate viscosity can be maintained and thus the convenience for use is good, thereby easily measuring an appropriate quantity.
• the viscosity is equal to or less than 150 mPa ⁇ s, it is possible to suppress the gelation in inputting the liquid detergent composition to a detergent inlet of a washing machine at a low temperature.
• the viscosity of the liquid detergent composition is measured as follows. First, a measurement sample is heated to 25°C in a constant-temperature bath set to 25°C. Then, the measurement sample heated to 25°C is set into a B-type viscometer (product name "viscometer Model DVM-B", made by Tokyo Keiki Inc.), rotation thereof is started at a rotation speed of 60 rpm/min by the use of rotor Nos. 2 to 4, and the viscosity is measured under the measuring condition of a measuring time of 60 seconds.
• a B-type viscometer product name "viscometer Model DVM-B", made by Tokyo Keiki Inc.
• the liquid detergent composition according to the invention can be produced by the use of usual methods.
• the liquid detergent composition can be produced by blending components (A) to (C) and optional components if necessary. At this time, water can be preferably added thereto.
• the obtained liquid detergent composition according to the invention can be used in the same way as typically used clothing liquid detergents. That is, examples thereof include a method of inputting the liquid detergent composition according to the invention (the product of the invention) to water along with the laundry during washing, a method of directly applying the product of the invention to oil stains or sebum stains, and a method of dissolving the product of the invention in water and immersing clothes therein. In addition, a method of applying the product of the invention to the laundry, appropriately leaving the laundry, and then performing a typical washing operation using a usual detergent can be also preferably used.
• the liquid detergent composition according to the invention includes the components (A) to (C).
• the component (A) is a nonionic surfactant which is obtained by processing an environmentally-friendly surfactant source material, that is, the fat and oil material, and which is superior in biodegradability (particularly, sebum detergency) and is excellent in cost and source supply.
• the component (B) is an anionic surfactant having a function of preventing the formation of a liquid crystal phase which can be more easily formed when the concentration of the surfactant becomes higher.
• the liquid detergent composition can include the surfactant at a high concentration and thus is superior in sebum detergency. Since the liquid detergent composition is not easily gelated in diluting the liquid detergent composition with water during washing, it is possible to effectively exhibiting superior sebum detergency.
• the liquid detergent composition according to the invention has superior low-temperature preservation stability and low-temperature solubility.
• the liquid detergent has viscosity. Accordingly when the low-temperature preservation stability is not sufficient, the viscosity unnecessarily increases and it is difficult to measure the liquid detergent in picking up the liquid detergent from the vessel. This tendency is marked in winter.
• the liquid detergent composition according to the invention is superior in low-temperature preservation stability, appropriate viscosity can be maintained at a low temperature in winter and thus the liquid detergent composition can be easily handled.
• the residual component of the detergent may be attached to clothes.
• the liquid detergent composition according to the invention is superior in low-temperature solubility, the non-dissolved residual component of the detergent is not easily attached to clothes.
• the resultant was aged for 30 minutes while maintaining the inside of the vessel at a temperature of 180°C and a pressure of 0.2 to 0.3 MPa, then the pressure in the vessel was lowered to 5.5 to 6.0 kPa, and non-reacted ethyleneoxide was distilled away for 10 minutes. Subsequently, the temperature in the vessel was lowered to 80°C to 100°C, and then 70 % by mass p-toluenesulfonic acid was added thereto to neutralize the resultant so that the pH of the 1 % by mass aqueous solution of the reactant was about 7, whereby a-1 was obtained.
• a-2 was obtained in the same way as obtaining a-1, except that 224.4 g of natural alcohol "CO-1214" made by P & G Co. was used as source alcohol and the amount of ethyleneoxide was changed to 760.6 g.
• a-3 was obtained in the same way as obtaining a-1, except that the amount of ethyleneoxide was changed to 610.2 g.
• a-4 was obtained in the same way as obtaining a-1, except that 224.4 g of natural alcohol "CO-1214" made by P & G Co. was used as source alcohol and the amount of ethyleneoxide was changed to 457.2 g.
• the nonionic surfactant was defined as "component (A')".
• component (A') polyoxyethylene lauryl ether, EO (ethyleneoxide)-average 3 mol adduct (product name "EMALEX 703", made by Nihon Emulsion Co., Ltd.) (with a purity of 100%)
• a-6 polyoxyethylene lauryl ether, EO-average 25 mol adduct (product name "EMALEX 725", made by Nihon Emulsion Co., Ltd.) (with a purity of 100%)
• a-7 C 12 H 25 O(CH 2 CH 2 O) 10 (CH 2 CH(CH 3 )O)H, (with a purity of 100%).
• a-8 C 14 H 29 O(CH 2 CH 2 O) 7 (CH 2 CH(CH 3 )O)(CH 2 CH 2 O) 3 H, (with a purity of 100%).
• a-9 polyoxyethylene
• beef tallow alkylamine composition of beef tallow alkylamine: 1 % by mass of an alkyl group with a carbon number of 12, 3 % by mass of an alkyl group with a carbon number of 14, 31 % by mass of an alkyl group with a carbon number of 16, 20 % by mass of an alkyl group with a carbon number of 18, 1 % by mass of an alkyl group with a carbon number of 20, and 44 % by mass of an alkenyl group with a carbon number of 18), EO-average 15 mol adduct (product name "Ethomeen T/25", made by Lion Akzo Co., Ltd.) (with a purity of 100%)
• the resultant was aged for 30 minutes while maintaining the inside of the vessel at a temperature of 180°C and a pressure of 0.2 to 0.3 MPa, then the pressure in the vessel was lowered to 5.5 to 6.0 kPa, and non-reacted ethyleneoxide was distilled away for 10 minutes.
• the temperature in the vessel was lowered to 80°C to 100°C, then 1231 g of the crude product was taken out of the vessel, and the temperature in the vessel was raised to 120°C. 173 g of propyleneoxide (gaseous state) was slowly added to the reactant while stirring the residual reactant and adjusting the adding rate by the use of a blowing tube so that the reaction temperature not be higher than 125°C.
• the resultant was aged for 2 hours while maintaining the inside of the vessel at a temperature of 120°C and a pressure of 0.25 to 0.30 MPa, then the pressure in the vessel was lowered to 5.5 to 6.0 kPa, and non-reacted propyleneoxide was distilled away for 10 minutes, whereby a-7 was obtained.
• the resultant was aged for 30 minutes while maintaining the inside of the vessel at a temperature of 180°C and a pressure of 0.2 to 0.3 MPa, then the pressure in the vessel was lowered to 5.5 to 6.0 kPa, and non-reacted ethyleneoxide was distilled away for 10 minutes.
• the temperature in the vessel was lowered to 80°C to 100°C, then 1463 g of the crude product was taken out of the vessel, and the temperature in the vessel was raised to 120°C.
• 110 g of propyleneoxide (gaseous state) was slowly added to the reactant while stirring the residual reactant and adjusting the adding rate by the use of a blowing tube so that the reaction temperature not be higher than 125°C.
• the resultant was aged for 2 hours while maintaining the inside of the vessel at a temperature of 120°C and a pressure of 0.2 to 0.3 MPa, then the pressure in the vessel was lowered to 5.5 to 6.0 kPa, and non-reacted propyleneoxide was distilled away for 10 minutes. Then, the temperature in the vessel was raised to 140°C, and 251 g of ethyleneoxide (gaseous state) was slowly added to the reactant while stirring the reactant and adjusting the adding rate by the use of a blowing tube so that the reaction temperature not be higher than 180°C.
• the resultant was aged for 30 minutes while maintaining the inside of the vessel at a temperature of 180°C and a pressure of 0.2 to 0.3 MPa, then the pressure in the vessel was lowered to 5.5 to 6.0 kPa, and non-reacted ethyleneoxide was distilled away for 10 minutes, whereby a-8 was obtained.
• reaction solvent carbon tetrachloride
• methanol aqueous monoethanolamine
• b-1 is a compound corresponding to the formula (2).
• ⁇ -sulfo laurate methyl ester sodium salt (b-2) was obtained in the same way as obtaining b-1, except that the pH of the reactant solution was adjusted to 7 using 20 % by mass aqueous sodium hydroxide instead of 0.5 mol/L aqueous monoethanolamine.
• b-2 is a compound corresponding to the formula (2).
• ⁇ -sulfo palmitate methyl ester monoethanolamine salt (b-3) was obtained in the same way as obtaining b-1, except that 68 g (0.25 mol) of palmitate methyl ester was used instead of 54 g (0.25 mol) of laurate methyl ester.
• b-3 is a compound corresponding to the formula (2).
• the resultant was cooled to room temperature, 1.3 mL of 5 N aqueous hydrochloric acid was added thereto, and the resultant was boiled along with isopropanol to completely distill away the solvent (toluene), whereby a solid crude product was obtained.
• b-4 was ⁇ -sulfo laurate monoethanolamide sodium salt.
• b-4 is a compound corresponding to the formula (3).
• a solid crude product was obtained in the same way as obtaining b-4, except that 4.98 g (66.4 mmol) of 3-amino-2-propanol was used instead of 4.05 g (66.4 mmol) of 2-aminoethanol.
• the obtained b-5 (15 mg) was dissolved in 0.5 mL of heavy water and the resultant was subjected to measurement at a measuring temperature of 25°C by the use of 1 H-NMR (270 MHz, product name "FT NMR SYSTEM JNM-EX270", made by Jeol Datum Ltd.). With reference to the peak of the heavy water of 4.75 ppm, the chemical shift was ⁇ 0.71 (br, 3H), ⁇ 1.05-1.15 (m+br, 19H), ⁇ 1.87 (br, 2H), ⁇ 3.18 (br, 2H), ⁇ 3.60 (br, 1H), and ⁇ 3.82 (br, 1H). As a result, it could be seen that the obtained b-5 was ⁇ -sulfo laurate isopropanolamide sodium salt.
• b-5 is a compound corresponding to the formula (3).
• the anionic surfactant was defined as "component (B')".
• component (B') polyoxyethylene alkyl ether sodium sulfate (AES) (ethyleneoxide was added to alcohol “Neodol 23", made by Shell Chemicals Limited) (mixture in which a mass ratio of alcohol with a carbon number of 12 and alcohol with a carbon number of 13 is 1:1, with a branching ratio of 20%) so that the average added mol number was 2 mol (with a purity of 66.3%)
• b-6 was synthesized as follows. 400 g of "Neodol 23" made by Shell Chemicals Limited as source alcohol and 0.8 g of potassium hydroxide as a catalyst were put into a 4 L autoclave, the inside of the autoclave was replaced with nitrogen, and the temperature was raised while stirring the resultant. Thereafter, 272 g of ethyleneoxide was added while maintaining the inside of the autoclave at a temperature of 180°C and a pressure of 0.3 MPa, whereby the reactant (alcohol ethoxylate) in which an average added mol number of ethyleneoxide is 2 was obtained.
• reactant alcohol ethoxylate
• Sodium benzoate product name "Sodium Benzoate”, made by Toa Gosei Co., Ltd. (with a purity of 100%)
• Citric acid product name "Liquid Citric Acid”, made by Ipposha Oil Industries Co., Ltd. (with a purity of 50%)
• Palmitic acid product name "NAA-160", made by NOF Corporation (with a purity of 100%)
• Paratoluenesulfonic acid product name "PTS Acid”, made by Kyowa Hakko Kirin Co., Ltd. (with a purity of 70%)
• Liquanase product name "Liquanase Ultra 2.5XL", made by Novozymes Inc.
• Dibutylhydroxy toluene product name "Sumilzer BHT-R", made by Sumitomo Chemical Co., Ltd. (with a purity of 100%)
• Monoethanolamine made by Nippon Shokubai Co., Ltd. (with a purity of 75%)
• Perfume perfume composition A described in Tables 11 to 18 of JP-A-2002-146399 (with a purity of 100%)
• Green No. 3 (pigment) product name "Green No. 3", made by Taketombo Co., Ltd. (with a purity of 100%)
• Blending quantities of the components used for preparation of the liquid detergent composition are shown in Table 1.
• the values in Table 1 are quantities reduced to purity.
• the "balance” means the amount of water blended to the liquid detergent composition when the total amount of all the components included in the liquid detergent composition is adjusted to 100 % by mass.
• a beaker containing 100 g of the liquid detergent composition was put into a constant-temperature bath of 25°C and was heated for 1 hour.
• the heated liquid detergent composition was set to a B-type viscometer (product name "Viscometer Model DVM-B", made by Tokyo Keiki Inc.), rotation thereof was started at a rotation speed of 60 rpm/min by the use of rotor No. 2 or 3, and the viscosity was measured under the measuring condition of a measuring time of 60 seconds.
• B-type viscometer product name "Viscometer Model DVM-B", made by Tokyo Keiki Inc.
• rotation was started at a rotation speed of 60 rpm/min by the use of rotor No. 4 and the viscosity was measured under the measuring condition of a measuring time of 60 seconds.
• 100 mL of the liquid detergent composition was put into a transparent glass bottle (wide-mouthed standard bottle PS-No. 11), and the bottle was covered and sealed with a lid. In this state, the bottle was left at room temperature (25°C) for 1 month and this resultant was set as a room-temperature preserved sample. 100 mL of the liquid detergent composition was put into a transparent glass bottle, and the bottle was covered and sealed with a lid. In this state, the bottle was left in a constant-temperature bath for 1 month. Thereafter, the liquid detergent composition was taken out from the constant-temperature bath and was left at room temperature (25°C) for 1 hour.
• the liquid appearance and the liquid viscosity of the resultant contents were observed with the naked eye and the low-temperature preservation stability was evaluated on the basis of the following criteria.
• a cotton cloth piece not having a sebum stain was defined as a non-stained cloth piece
• a cotton cloth piece not subjected to the washing operation was defined as a stained cloth piece
• a cotton cloth piece having been subj ected to the washing operation was defined as a washed cloth piece.
• the reflectance of the non-stained cloth piece, the stained cloth piece, and the washed cloth piece was measured by the use of a spectral color-difference meter ("SE2000", made by Nippon Denshoku Industries Co., Ltd.) and the deterging rates thereof were calculated using Expression (I).
• Deterging rate (%) ⁇ (K/S of stained cloth-K/S of washed cloth)/(K/S of stained cloth-K/S of non-stained cloth) ⁇ ⁇ 100 ...
• K/S represent (1-R/100) 2 /(2R/100) (where R represents the reflectance (%) of the non-stained cloth, the stained cloth, or the washed cloth).
• the deterging rates (%) of 10 pieces of stained cloth were calculated and the sebum detergency was evaluated using the average value thereof on the basis of the following criteria.
• the liquid detergent compositions obtained in the examples could include surfactants with high concentrations without enhancing the viscosity thereof.
• the liquid detergent compositions had superior low-temperature preservation stability and had superior low-temperature solubility and sebum detergency during washing.
• the sebum detergency was apt to be improved as the ratio of the component (A) in the surfactants increased, and the low-temperature solubility was apt to be improved as the ratio of the component (B) increased.
• the compounds represented by the formula (3) were used as the component (B), the increase in viscosity was further suppressed and thus the low-temperature preservation stability was superior, compared the case where the compounds represented by the formula (2) were used.
• the concentration of the surfactant that is, the total amount of the component (A) and the component (B)
• the sebum detergency was apt to be improved.
• Example3 In the comparison result of Example3 with Examples 18 and 19, the low-temperature solubility in Example 3 including a larger amount of ethanol was superior. In the comparison result of Examples 7 and 20, the low-temperature preservation stability in Example 7 including a larger amount of ethanol was superior. In the comparison result of Examples 21 to 36, when the compounds represented by the formula (3) were used as the component (B), the low-temperature preservation stability was superior. When two species of solvents were used as the component (C) and when three species of solvents were used, the same tendency was exhibited.
• Comparative Example 1 not including a component (B)
• the viscosity was apt to easily increase and the low-temperature preservation stability and the low-temperature solubility were inferior.
• the gelation was caused by inputting the liquid detergent composition and thus the liquid detergent composition was hardly dissolved in water, thereby degrading the sebum detergency.
• Comparative Example 2 not including a component (A)
• the sebum detergency was inferior. Since the component (B) was included with a high concentration, precipitates insoluble in water were generated and the low-temperature preservation stability and the low-temperature solubility were inferior.
• Comparative Example 6 including a-6 instead of the component (A) the increase in viscosity could be easily caused at a low temperature and thus the low-temperature preservation stability was inferior.
• Comparative Example 7 including the component (B') instead of the component (B) the viscosity was apt to easily increase and the low-temperature preservation stability and the low-temperature solubility were inferior.
• the gelation was caused by inputting the liquid detergent composition and thus the liquid detergent composition was hardly dissolved in water, thereby degrading the sebum detergency.
• Comparative Examples 8 to 10 not including a component (B) but including the component (A') instead, the viscosity was apt to easily increase and the low-temperature preservation stability and the low-temperature solubility were inferior.
• Comparative Example 11 in which the total amount of the component (A) and the component (B) was 35 % by mass, the sebum detergency was inferior.
• Comparative Example 12 in which the total amount of the component (A) and the component (B) was 80 % by mass, the viscosity was apt to easily increase and the low-temperature preservation stability was inferior. The initial appearance was not good and the low-temperature solubility was inferior.
• Comparative Example 13 In Comparative Example 13 in which the mass ratio of the amount of the component (B) to the total amount of the component (A) and the component (B) was 0.5/10, the low-temperature preservation stability and the low-temperature solubility were inferior. In Comparative Example 14 in which the mass ratio of the amount of the component (B) to the total amount of the component (A) and the component (B) was 7/10, the low-temperature preservation stability and the sebum detergency were inferior.
• liquid detergent composition according to the invention includes a surfactant at a high concentration and has superior low-temperature preservation stability and superior low-temperature solubility and sebum detergency during washing, it is applicable to a clothing detergent or the like.

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• 2010
  • 2010-10-14 KR KR1020127010596A patent/KR101791707B1/ko active IP Right Grant
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• 2012
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