JP2005170984A - Laundry pretreatment composition for clothing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing pretreatment agent composition for clothes, which yields an excellent washing performance when applied to clothes to be washed before washing. <P>SOLUTION: The washing pretreatment agent composition for clothes contains prescribed proportions of (a) a surfactant, (b) glycine and/or taurine, (c) a chelating agent which has a molecular weight of ≤1,000, a calcium-capturing capacity of 200-600 CaCO<SB>3</SB>mg/g and a calcium stability constant of 4-10, (d) an alkaline agent and (e) water. The composition has a pH of 7.5-12 measured at 20°C through a method according to JIS K 3362:1998. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a laundry pre-treatment composition for clothing that is applied to an object to be cleaned.

  In the case of partial stains such as collared sleeves, socks, and spilled food, normal washing may not remove the stains sufficiently or leave stains. In general, collar sleeves and stains are dealt with by partially increasing the detergent concentration by directly applying detergent. It was difficult to clean socks even if the detergent concentration was partially increased and mechanical force such as hand scissors or brushing was applied.

For example, Patent Documents 1 and 2 disclose an applied cleaning agent that performs washing after being applied to an object to be cleaned. Moreover, the washing | cleaning pre-treatment agent composition of the low surfactant density | concentration which mix | blended the chelating agent is known (patent documents 3-5).
JP-A-60-101199 Japanese Patent Laid-Open No. 10-298599 JP 2003-34799 A JP 2003-34800 A JP 2003-41479 A

  However, in the contents disclosed in Patent Documents 1 and 2, the cleaning power is insufficient, and in particular, the cleaning power is insufficient for human-derived dirt such as sock dirt. In addition, in Patent Documents 3 to 5, it is desired to further improve the cleaning power against dirt derived from humans such as socks dirt and collar dirt.

  An object of the present invention is to provide a laundry pretreatment agent composition for clothing which can obtain excellent cleaning performance by washing after being applied to an object to be cleaned. In particular, it is an object of the present invention to provide a laundry pretreatment composition for clothes that can further improve the cleaning performance of sock dirt and can be easily processed without applying mechanical force such as hand scrubbing or brushing.

The present invention comprises (a) a surfactant (hereinafter referred to as component (a)) 0.05 to 10% by mass, (b) glycine and / or taurine (hereinafter referred to as component (b)) 0.05 to 10% by mass. %, (C) a chelating agent having a molecular weight of 1000 or less having a calcium capture amount of 200 to 600 CaCO ₃ mg / g and a calcium stability constant of 4 to 10 (hereinafter referred to as component (c)), 1 to 30% by mass, (d) alkali 1 to 30% by mass of an agent (hereinafter referred to as component (d)) and 50 to 95% by mass of (e) water (hereinafter referred to as component (e)), and 20 ° according to the method described in JIS K 3362: 1998. The present invention relates to a laundry pretreatment agent composition having a pH measured by C of 7.5 to 12.

  In addition, the present invention provides a post-treatment composition containing 0.005 to 0.2% by mass of a surfactant and water after the article to be cleaned is brought into contact with the laundry pre-treatment composition for clothing of the present invention. It is related with the washing method made to contact.

  By performing washing after applying the laundry pretreatment composition for clothes of the present invention to an article to be washed, excellent washing performance against socks and collar stains, particularly excellent washing performance against socks stains can be obtained.

  The laundry pretreatment composition for clothes of the present invention has a pH of 7.5 to 12 at 20 ° C. according to the method described in JIS K 3362: 1998, preferably 8 to 11 in terms of detergency and safety. 5-11 are more preferable, 9-11 are still more preferable, and 10-11 are especially preferable.

  In addition, the laundry pretreatment composition for clothing preferably has a viscosity at 20 ° C. of 1 to 50 mPa · s (B-type viscometer, 60 r / min) from the viewpoint of easy discharge from the container at the time of application. Or when discharging | emitting to foam form, 1-30 mPa * s is more preferable, 1-20 mPa * s is still more preferable, and 2-15 mPa * s is especially preferable.

  The pretreatment composition for washing of the present invention may be applied directly to the object to be cleaned from the hole of the container discharge part, applied through a sponge, brush or roll, or measured by a measuring container and applied. From the viewpoint of convenience, it is more preferable to apply in the form of spray or foam, and in order to avoid the user from sucking a fine mist, it is more preferable to apply in the form of foam.

<(A) component>
The laundry pretreatment composition for clothes of the present invention contains 0.05 to 10% by mass of a surfactant [component (a)]. 0.1-9 mass% is preferable at the point of washing | cleaning performance and applicability | paintability, 0.5-8 mass% is more preferable, 1-7 mass% is still more preferable.

  Examples of the surfactant include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants. Among them, it is preferable to contain an amphoteric surfactant in terms of cleaning performance, more preferably 50% by mass or more, more preferably 60% by mass or more, more preferably 70% by mass or more in the surfactant. It is particularly preferred.

  Examples of amphoteric surfactants include alkyl betaines, imidazolinium betaines, amine oxides, and alkylalanines. In terms of cleaning performance, the compound represented by the following general formula (II) or (III) is preferably 50% by mass or more, more preferably 60% by mass or more, particularly preferably 70% by mass or more in the surfactant. The compound represented by the general formula (II) is preferably 50% by mass or more, more preferably 60% by mass or more, and particularly preferably 70% by mass or more in the surfactant.

[Wherein R ¹ is an alkyl or alkenyl group having 7 to 20 carbon atoms, preferably 9 to 15 carbon atoms, and R ² and R ³ are each an alkyl or alkenyl group having 1 to 3 carbon atoms, preferably 1 carbon atom. An alkyl group or a hydrogen atom; R ⁴ represents a hydrogen atom or an alkyl or alkenyl group having 1 to 5 carbon atoms, preferably a hydrogen atom or a methyl group, and m represents a number of 1 to 5, preferably 3. ]

[Wherein R ⁵ is an alkyl group or alkenyl group having 8 to 20 carbon atoms, preferably 12 to 14 carbon atoms, and R ⁶ and R ⁷ are each an alkyl group or alkenyl group having 1 to 3 carbon atoms, preferably an alkyl group having 1 carbon atom. A group or a hydrogen atom, p represents a number of 0 to 10, preferably 2 to 4; ]

  Anionic surfactants include alcohol sulfates, alcohol ethoxylate sulfates, alkylbenzene sulfonates, paraffin sulfonates, α-olefin sulfonates, α-sulfo fatty acid salts, α-sulfo salts. Examples include fatty acid alkyl ester salts or fatty acid salts. In particular, linear alkylbenzene sulfonates having 12 to 14 carbon atoms in the alkyl chain and alkyl sulfate esters having 12 to 18 carbon atoms are preferred, and alkali metals and alkanolamine salts are preferred as the counter ion.

  Nonionic surfactants include polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenyl ether, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene glycol fatty acid ester, polyoxyethylene polyoxypropylene block polymer, fatty acid alkanolamide, alkyl polyalkylene. Glycosides are preferred. In particular, alkyl polyglycosides are preferred.

  Examples of the cationic surfactant include quaternary mono long chain alkyl or di long chain alkyl ammonium salts.

<(B) component>
The laundry pretreatment composition for clothes of the present invention contains 0.05 to 10% by mass of glycine and / or taurine [component (b)]. Among the garments, 0.1 to 9% by mass is preferable, so that the sock dirt cleaning performance and applicability are preferable, 0.3 to 8% by mass is more preferable, and 0.5 to 7% by mass is still more preferable. Due to the presence of the component (b), the detergency against sock dirt is greatly improved.

<(C) component>
The laundry pretreatment composition for clothing of the present invention comprises 1 to 30 masses of a chelating agent (component (c)) having a molecular weight of 1000 or less and having a calcium capture amount of 200 to 600 CaCO ₃ mg / g and a calcium stability constant of 4 to 10. %contains. 2-25 mass% is preferable at the point of washing | cleaning performance and applicability | paintability, 3-20 mass% is more preferable, 3.5-15 mass% is still more preferable, 4-12 mass% is the most preferable. In terms of cleaning performance, the molecular weight is preferably 800 or less, and more preferably 600 or less. Further, the lower limit of the molecular weight is preferably 150 or more.

(C) calcium trapping quantity of component is 200~600CaCO ₃ mg / g, detergency, 250~550CaCO ₃ mg / g are preferable in terms of environmental suitability, 300~500CaCO ₃ mg / g is more preferable. The calcium stability constant is 4 to 10, preferably 5 to 9, more preferably 6 to 8, and still more preferably 6.5 to 8 in terms of detergency and environmental suitability.

  In the present invention, the calcium stability constant and the calcium capture amount are those obtained by the following method.

(Measurement method of calcium stability constant)
_{0.1mol / NH 4 Cl-NH 4} OH (pH10) liters to prepare a solution as a buffer. All sample solutions are prepared using this buffer. For measuring the Ca ²⁺ concentration, an ion meter 920A manufactured by Orion Co., Ltd. and a Ca ²⁺ ion electrode are used. First, a relationship between the calcium chloride concentration and the electrode potential is obtained, and a calibration curve is created. 5.36 × 10 ^-2 mol / l solution of calcium chloride, a 5.36 × 10 ^-4 mol / l solution of a chelating agent sample are prepared. Add 1 ml of calcium chloride solution to 100 ml of chelating agent sample solution and stir for 5 minutes. The remaining Ca ²⁺ concentration is measured using a Ca ²⁺ ion electrode. Assuming that the chelating agent forms a chelate complex with Ca ²⁺ at 1: 1, the calcium stability constant (Ca stability constant) is obtained from the following formula.

(Measurement method of calcium capture amount)
All solutions are prepared using the following buffers. In addition, a calcium ion electrode was appropriately used.
Buffer solution: 0.1M-NH ₄ Cl-NH ₄ OH buffer (pH 10.0)
(1) Preparation of calibration curve Various standard calcium ion solutions are prepared, and a calibration curve showing the relationship between the logarithm of the calcium ion concentration and the potential as shown in FIG. 1 is prepared.
(2) Measurement of calcium ion trapping amount
About 0.1 g of sample (chelating agent) is weighed into a 100 ml volumetric flask, and a 100 ml solution is prepared with the above buffer solution. To this, a CaCl ₂ aqueous solution (pH 10.0) corresponding to 20000 ppm (calculated in terms of CaCO ₃ ) is dropped from a burette (a blank is also measured).
The dropping is carried out by adding 0.1 to 0.2 ml of an aqueous CaCl ₂ solution, reading the potential at that time, and obtaining the calcium ion concentration from the calibration curve in FIG. Based on this, a graph showing the relationship between the calcium ion concentration and the dropping amount of the CaCl ₂ aqueous solution is prepared, and FIG. 2 is obtained. The calcium ion concentration at the sample dropping amount A in FIG. 2 is the calcium ion trapping amount of the sample.

Examples of the component (c) include compounds having 2 to 5, preferably 3 to 5, COOM groups (M is H, Na, K, NH ₄ ) in the molecule. Among these, the compounds represented by the following general formula (I) are preferable from the viewpoint of cleaning performance and environmental suitability.

[Wherein, R is — (CH ₂ ) _n —A, A is H, OH, COOM, M is H, Na, K, NH ₄ , preferably Na, and n is 0-5. Indicates a number. ]

  In the present invention, the mass ratio of the component (c), preferably the compound represented by the general formula (I), and the component (a), preferably the amphoteric surfactant, is (a) / (c) = 3/1. From the viewpoint of cleaning performance, it is preferably ˜1 / 5, more preferably 2/1 to 1/3, still more preferably 1/1 to 1/3, and particularly preferably 1/1 to 1/2.

  In the present invention, the mass ratio of the component (c), preferably the compound represented by the general formula (I), and the component (b) is (b) / (c) = 1/100 to 1/1. It is preferable in terms of sock dirt cleaning performance, more preferably 1/80 to 3/4, still more preferably 1/50 to 2/3, and particularly preferably 1/10 to 1/2.

<(D) component>
The laundry pretreatment composition for clothes of the present invention contains 1 to 30% by mass of an alkaline agent [component (d)]. 3-25 mass% is preferable at the point of washing | cleaning performance and applicability | paintability, 5-20 mass% is more preferable, and 5-15 mass% is still more preferable.

  Examples of the component (d) include alkali metal carbonates such as sodium carbonate, sodium hydrogen carbonate, potassium carbonate and potassium hydrogen carbonate, alkali metal silicates such as sodium silicate and potassium silicate, orthophosphate, metaphosphate and pyrophosphate. Examples thereof include salts, polyphosphates such as hexametaphosphate, alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine, disodium hydrogen phosphate, trisodium phosphate, and borate.

  The component (d) has a cleaning performance, and the maximum pH of the 0.025 mass% aqueous solution or dispersion of the component (d) is 10 or more (20 ° C.), and 1 liter of the aqueous solution or dispersion is pH 9 It is preferable that the compound requires 10 ml or more of a 0.1N hydrochloric acid aqueous solution in order to achieve (20 ° C.). Examples of such compounds include sodium carbonate, potassium carbonate, sodium silicate, trisodium phosphate, monoethanolamine and the like. Of these, sodium carbonate, potassium carbonate, and sodium silicate are more preferable, and sodium carbonate is particularly preferable.

<(E) component>
The laundry pretreatment agent composition of the present invention contains 50 to 95% by mass of water [component (e)]. 55-90 mass% is preferable at the point of washing | cleaning performance and applicability | paintability, 60-85 mass% is more preferable, 65-80 mass% is still more preferable.

<Component (f)>
The pretreatment composition for laundry of the present invention comprises (f) a chelating agent having a molecular weight of 2000 or more (component (f)) having a calcium capture amount of 50 to 500 CaCO ₃ mg / g and a calcium stability constant of 1 to 8. It is preferable to contain 15 mass%. 0.1-12 mass% is preferable at the point of washing | cleaning performance and application | coating property, 0.2-10 mass% is more preferable, 0.3-5 mass% is still more preferable, 0.5-3 mass% is the most preferable. . Moreover, the molecular weight of (f) component is 2000 or more in terms of stability and washing | cleaning performance, 2000-20000 are preferable and 2000-10000 are more preferable. In addition, this molecular weight is a weight average molecular weight about a high molecular compound.

Calcium trapping amount of the component (f) is 50~500CaCO ₃ mg / g, preferably 80~400CaCO ₃ mg / g in terms of detergency, 100~350CaCO ₃ mg / g is more preferable. Moreover, a calcium stability constant is 1-8, 1-6 are preferable at the point of a detergency, 2-6 are more preferable, and 2-4 are still more preferable. These measuring methods are the same as those of the component (c).

Examples of the component (f) include compounds having a COOM group (M is H, Na, K, NH ₄ ) in the molecule. Among them, in terms of cleaning performance, polyacrylic acid or a salt thereof, polymaleic acid or a salt thereof, carboxymethyl cellulose, an acrylic acid-maleic acid copolymer or a salt thereof, a maleic anhydride-diisobutylene copolymer or a salt thereof, anhydrous Maleic acid-methyl vinyl ether copolymer or salt thereof, maleic anhydride-isobutylene copolymer or salt thereof, maleic anhydride-vinyl acetate copolymer or salt thereof, and claim 1 of JP-A-59-62614 Organic polycarboxylic acids such as polymers described in -21 (page 1, column 3, line 5 to page 3, column 4, line 14) and / or salts thereof are preferred. Particularly preferred is polyacrylic acid or a salt thereof.

  In the present invention, the mass ratio of the component (c), preferably the compound represented by the general formula (I), and the component (f) is (f) / (c) = 1/50 to 1/1. Is preferable in terms of cleaning performance, more preferably 2/30 to 1/2, still more preferably 1/20 to 1/3, and particularly preferably 1/10 to 1/4. Further, in terms of cleaning performance, the calcium stability constant of the component (c) is preferably larger than the calcium stability constant of the component (f), more preferably 1.1 times or more, and 1.3 times or more. Further preferred is 1.5 times or more. The upper limit is preferably 10 times or less. Further, in terms of cleaning performance, the amount of calcium captured by the component (c) is preferably larger than the amount of calcium captured by the component (f), more preferably 1.1 times or more, and even more preferably 1.5 times or more. 2 times or more is particularly preferable. The upper limit is preferably 12 times or less.

<(G) component>
The laundry pretreatment composition of the present invention preferably contains 1 to 30% by mass of (g) hydrotrope agent (component (g)) in terms of low-temperature stability and applicability, and 2 to 15% by mass. Is more preferable, and 3-10 mass% is still more preferable.

  (G) As a component, C1-C4 lower alcohol, such as methanol, ethanol, propanol, glycerin, ethylene glycol, propylene glycol, toluenesulfonic acid or its salt, xylenesulfonic acid or its salt, the following general formula (IV ) And the like.

_{X- (Ph) -O (CH 2} CH 2 O) p (CH 2 CHRO) q Y (IV)
[In the formula, X is a hydrogen atom, an alkyl or alkenyl group having 1 to 4 carbon atoms, a hydroxyl group, or a halogen; Y is a hydrogen atom, a methyl group, or an ethyl group; Ph is a phenylene group; Yes, R is a hydrogen atom, a methyl group, or an ethyl group, p is 1-6, preferably 1-3, q is 0-4, preferably 0-2, and p + q is 1- 10, preferably 1-6. ]

  Of these, lower alcohols having 2 to 3 carbon atoms, p-toluenesulfonic acid or salts thereof are more preferable.

<Other ingredients>
The pretreatment composition for laundry of the present invention includes (1) an anti-contamination agent and a dispersant of 0.01 to 10% by mass, such as (1) polyethylene glycol having a weight average molecular weight of 5000 or more, naphthalene sulfonate formalin condensate, (2 ) 0.01 to 10% by mass of a color transfer inhibitor such as polyvinylpyrrolidone, (3) 0.01 to 2% by mass of a foaming agent such as silicone and silica, (4) butylhydroxytoluene, distyrenated cresol, sodium sulfite and 0.01-2% by mass of an antioxidant such as sodium bisulfite, (5) a coloring agent, (6) an enzyme such as amylase, protease, lipase, cellulase, (7) calcium chloride, calcium sulfate, formic acid, boric acid ( Enzyme stabilizers such as boron compounds), (8) perfume, (9) antibacterial preservatives and the like can be blended.

<How to wash>
A washing method in which an object to be cleaned is brought into contact with the pretreatment composition for washing of the present invention and then brought into contact with a posttreatment composition containing 0.005 to 0.2% by mass of a surfactant and water is a washing performance. It is preferable in terms of simplicity.

  After the object to be cleaned and (A) the pretreatment composition of the present invention are brought into contact, the object to be cleaned is brought into contact with (B) the posttreatment composition while holding the (A) pretreatment composition. The interval from the completion of the contact of the (A) pretreatment composition to the contact of the (B) posttreatment composition is preferably 30 seconds or more in terms of cleaning performance, and preferably 1 minute or more. More preferred is 5 minutes or longer. In terms of effects and convenience, 5 hours or less is preferable, 2 hours or less is more preferable, 1 hour or less is further preferable, and 30 minutes or less is particularly preferable.

  The contact between the article to be cleaned and the (B) post-treatment composition is preferably performed by immersing the article to be cleaned in the (B) post-treatment composition in terms of cleaning performance. Moreover, it is preferable to immerse with a washing machine and to stir.

  The (B) post-treatment composition used in the present invention preferably has a pH of 7.5 to 12 at 20 ° C. according to the method described in JIS K3362: 1998, in terms of detergency and safety. More preferably, 8.5-11 are still more preferable, 9-11 are especially preferable, and 10-11 are the most preferable.

  The (B) post-treatment agent composition used in the present invention preferably has a viscosity at 20 ° C. of 0.5 to 5 mPa · s (B-type viscometer, 60 r / min) in terms of easy contact with the object to be cleaned. 0.6 to 2 mPa · s is more preferable, and 0.8 to 1.5 mPa · s is still more preferable.

  The post-treatment agent composition (B) used in the present invention contains 0.005 to 0.2% by mass of a surfactant. 0.01-0.1 mass% is preferable at the point of washing | cleaning performance and contact property, and 0.015-0.05 mass% is more preferable.

  (B) As the surfactant in the post-treatment composition, one or a combination of an anionic surfactant, a nonionic surfactant, an amphoteric surfactant, and a cationic surfactant can be exemplified. Anionic surfactants and nonionic surfactants are preferred. In particular, in terms of detergency, the mass ratio of the anionic surfactant / nonionic surfactant is preferably 20/1 to 1/10, more preferably 10/1 to 1/5, and 5/1 to 1 /. 1 is more preferable.

  Examples of the anionic surfactant include a sulfate ester salt of an alcohol having 10 to 18 carbon atoms, a sulfate ester salt of an alkoxylated product of an alcohol having 8 to 20 carbon atoms, an alkylbenzene sulfonate, a paraffin sulfonate, and an α-olefin sulfonic acid. Salts, α-sulfo fatty acid salts, α-sulfo fatty acid alkyl ester salts or fatty acid salts are preferred. In the present invention, a linear alkylbenzene sulfonate having an alkyl chain with 10 to 14 carbon atoms, preferably 12 to 14 carbon atoms is preferred, and an alkali metal salt or an amine is preferred as the counter ion, particularly sodium and / or potassium. Monoethanolamine and diethanolamine are preferred.

  Nonionic surfactants include polyoxyalkylene alkyl (carbon number 8 to 20) ether, alkyl polyglycoside, polyoxyalkylene alkyl (carbon number 8 to 20) phenyl ether, polyoxyalkylene sorbitan fatty acid (carbon number 8 to 22). ) Ester, polyoxyalkylene glycol fatty acid (carbon number 8-22) ester, and polyoxyethylene polyoxypropylene block polymer are preferable. In particular, as a nonionic surfactant, 4 to 20 moles of alkylene oxide such as ethylene oxide (hereinafter referred to as EO) or propylene oxide (hereinafter referred to as PO) was added to an alcohol having 10 to 18 carbon atoms. Polyoxyalkylene alkyl ethers are preferable, and those having an HLB value (calculated by the Griffin method) of 10.5 to 15.0, preferably 11.0 to 14.5 are preferable.

  The (B) post-treatment agent composition used in the present invention contains water. 99-99.99 mass% is preferable at the point of washing | cleaning performance and contact property, 99.5-99.98 mass% is more preferable, 99.8-99.95 mass% is still more preferable.

  The (B) post-treatment composition used in the present invention preferably contains an enzyme in terms of cleaning performance. (B) Examples of the enzyme contained in the post-treatment composition include amylase, protease, lipase, and cellulase. Of these, protease and cellulase are preferable.

  The (B) post-treatment agent composition used in the present invention is composed of (1) inorganic builder such as zeolite, amorphous aluminosilicate, crystalline silicate, (2) organic carboxylic acid polymer or its Salt, (3) alkaline agent such as carbonate and silicate, (4) bleaching agent such as percarbonate and perborate, (5) bleach activator, (6) anti-contamination agent, (7) A foam control agent, (8) perfume, (9) fluorescent whitening agent, (10) reducing agent and the like can be contained.

Examples 1-7, Comparative Examples 1-5
The laundry pretreatment agent composition shown in Table 1 was prepared. The pH of 20 degreeC of the composition of the obtained Example was all 10-11. The viscosities of the compositions of the examples were 2 to 15 mPa · s (B-type viscometer, 20 ° C., 60 r / min).

  About these, the cleaning power was evaluated by the method shown below. The results are shown in Table 1.

<Evaluation of cleaning power>
(1) Socks Dirty Cloth (1-1) Pre-treatment method 40L of water described in JIS K3362: 1998 is placed in the washing tub of a fully automatic two-tank washing machine (Toshiba Galaxy 3.6). Insert new socks [Support & Clean (cotton, acrylic, polyester, polyurethane), Gunze Co., Ltd.]. Furthermore, 53 g (in terms of anhydride) of the detergent for determining cleaning power described in JIS K3362: 1998 (no addition of fluorescent brightener) is added. Washing for 10 minutes, dehydration for 1 minute, running water rinsing with a water amount of 15 L / min for 8 minutes, and dehydration for 5 minutes were performed, and the film was naturally dried indoors. This washing cycle is repeated 5 times to make a pretreatment.

(1-2) Preparation of Socks Dirty Cloth Distribute socks treated by the above method to 10 elementary and junior high school students and wear them for one day. Of the collected socks, six pairs with a large amount of dirt and equivalent dirt on the left and right sides are selected, and these are designated as sock dirt cloths.

(2) Collar red cloth A collar red cloth described in JIS K3362: 1998 is prepared.

(3) Washing conditions and evaluation method 40 L of used water described in JIS K3362: 1998 is put in a washing tub of an automatic two-tank washing machine (Toshiba Galaxy 3.6), and 1.4 kg of cotton unweared underwear and Put a 0.6 kg cotton / polyester blended shirt. Furthermore, 53 g (in terms of anhydride) of an indicator detergent for determination of detergency described in JIS K3362: 1998 (no addition of fluorescent brightener) is added. Furthermore, after applying 4 g of the pretreatment composition on one sock-stained cloth (or collar-skin cloth), six socks-stained cloths (or collar-skin cloths) that were allowed to stand for 5 minutes (each of three levels of stains) 2) in a washing tub and wash normally for 10 minutes. Then dehydrate for 1 minute and rinse with running water at a rate of 15 L / min for 8 minutes. Then dehydrate for 5 minutes and let it air dry indoors.

  A pair obtained by performing the same operation without applying the laundry pretreatment agent composition as a blank is visually compared, and evaluated according to the following criteria.

Evaluation criteria A: All three levels of dirt are clearly removed from the blank.
○: Slightly less dirt than blanks in all three stages of dirt.
(Triangle | delta): There is almost no difference with a blank in all three levels of dirt.
X: In all three stages of dirt, the dirt is inferior to that of the blank.

・ Amphoteric surfactant 1: Lauramidopropylamine oxide (Softazolin LAO-C, Kawaken Fine Chemicals Co., Ltd.)
-Amphoteric surfactant 2: dimethyl lauryl amine oxide (Amphithol 20N, Kao Corporation, pure conversion)
Amphoteric surfactant 3: Lauryl (2-hydroxy-3-sulfopropyl) dimethylbetaine (Amphithol 20HD, Kao Corporation, pure conversion)
Nonionic surfactant 1: Decylglucoside (Mydol 10, Kao Corporation, pure conversion)
・ Nonionic surfactant 2: Random addition of average 8 mol of EO and average 2 mol of PO to linear primary alcohol having 10 to 14 carbon atoms ・ Anionic surfactant 1: Sodium coconut oil fatty acid Anionic surfactant 2: Sodium alkylbenzenesulfonate having a linear alkyl group having 10 to 14 carbon atoms and chelating agent 1: Trisodium methylglycine diacetate (Trilon M, BASF Japan Ltd., pure component conversion) (Ca Amount captured 430 CaCO ₃ mg / g, Ca stability constant 6.1)
Chelating agent 2: aspartic acid-N, N-tetrasodium diacetate (Ca trapping amount 328CaCO ₃ mg / g, Ca stability constant 6.7)
Chelating agent 3: serine diacetate trisodium (Ca trapping amount 347 CaCO ₃ mg / g, Ca stability constant 6.5)
Chelating agent 4: tetrasodium glutamate diacetate (Ca trapping amount 305 CaCO ₃ mg / g, Ca stability constant 5.8)
Chelating agent 5: trisodium ethylglycine diacetate (Ca trapping amount 419 CaCO ₃ mg / g, Ca stability constant 5.7)
Carboxylic acid-based polymer 1: phenoxypolyethylene glycol, acrylic acid, maleic acid copolymer (weight average) synthesized by the method described in Japanese Patent Application Laid-Open No. 10-60476, item 4, left column, line 43 to item 4, right column, line 2 Molecular weight 10,000, solid content 51.2% by mass, Ca trapping amount 75CaCO ₃ mg / g, Ca stability constant 3.6)
Carboxylic acid polymer 2: sodium polyacrylate (weight average molecular weight 5000, Ca trapping amount 205CaCO ₃ mg / g, Ca stability constant 3.4)
Carboxylic acid-based polymer 3: Aqualic DL365 (manufactured by Nippon Shokubai Co., Ltd., sodium polyacrylate, weight average molecular weight 5000, Ca trapping amount 220 CaCO ₃ mg / g, Ca stability constant 3.2)
Enzyme: Everase 16.0L-EX (protease, manufactured by Novozymes)
-Dye: Kayashi Onturkis KNA (manufactured by Nippon Kayaku Co., Ltd., 10 ppm (mass ratio) added to the composition)

It is a calibration curve for calculating | requiring a calcium ion concentration from an electric potential. It is a graph showing a dropping amount of related calcium ion concentration and the CaCl ₂ aqueous solution.

Claims (6)

(A) surfactant 0.05 to 10% by mass, (b) glycine and / or taurine 0.05 to 10% by mass, (c) calcium capture amount 200 to 600 CaCO ₃ mg / g and calcium stability constant 4 to 20 containing 1 to 30% by mass of a chelating agent having a molecular weight of 1000 or less, 10 (d) 1 to 30% by mass of an alkaline agent, and (e) 50 to 95% by mass of water, and 20 according to the method described in JIS K 3362: 1998 A laundry pretreatment composition for clothing having a pH of 7.5 to 12 measured at ° C. Furthermore, before washing for clothes according to claim 1, further comprising (f) 0.05 to 15% by mass of a chelating agent having a molecular weight of 2000 or more and having a calcium capture amount of 50 to 500 CaCO ₃ mg / g and a calcium stability constant of 1 to 8. Treatment agent composition. The laundry pretreatment composition for clothing according to claim 1 or 2, further comprising (g) 1 to 30% by mass of a hydrotrope agent. The laundry pretreatment composition for clothing according to any one of claims 1 to 3, wherein (c) is a compound represented by the following general formula (I).

[In the formula, R is — (CH ₂ ) _n —A, A is H, OH, COOM, M is a hydrogen atom, Na, K, NH ₄ , and n is a number from 0 to 5. . ] The laundry pretreatment composition for clothing according to any one of claims 1 to 4, wherein 50% by mass or more in (a) is a compound represented by the following general formula (II).

[Wherein, R ¹ is an alkyl group or alkenyl group having 7 to 20 carbon atoms, and R ² and R ³ are each an alkyl group or alkenyl group having 1 to 3 carbon atoms, or a hydrogen atom. R ⁴ is a hydrogen atom or an alkyl or alkenyl group having 1 to 5 carbon atoms. m shows the number of 1-5. ] After bringing the article to be cleaned into contact with the laundry pre-treatment composition for clothing according to any one of claims 1 to 5, a post-treatment composition containing 0.005 to 0.2% by mass of a surfactant and water Washing method to contact.

Images