JP2001139987A - Presoaking detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a presoaking detergent composition for clothes, capable of exhibiting excellent detergency to an accumulated sebum fouling which causes darkish or yellowed parts formed on clothes, bedding such as a quilt cover, and a shirt and blouse preserved for a long period, sometimes generates unpleasant odor, and can not be removed completely by normal laundry. SOLUTION: A presoaking detergent providing high activities against the sebum fouling, and excellent in low-temperature solubility is discovered, when carrying out the presoaking and washing without using an anionic surfactant such as an LAS in the system using a nonionic surfactant and a specific sodium carbonate. The presoaking detergent composition is characterized by the composition comprising (a) 12-35 wt.% nonionic surfactant having 12-14 average alkyl chain length, 4-10 polyoxyethylene chain length and 0-5 polyoxypropylene chain length, and (b) 25-50 wt.% heavy sodium carbonate, and substantially not containing anionic surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a presoaked detergent composition, and more particularly to a presoaked detergent composition for clothing.

[0002]

2. Description of the Related Art Bedding such as clothing, sheets, and a blanket cover,
Y-shirts, blouses, and the like stored for a long period of time may cause darkening or yellowing, and may sometimes generate an unpleasant odor. There is a problem that these stains cannot be completely removed by ordinary washing. JP-A-8-170095 and JP-A-8-70095
No. 176590 describes an invention in which a nonionic activator is combined with a soap or an anionic activator or a lipolytic enzyme. However, according to the method described in each of these patent publications, sebum such as skin shirts and blouses accumulates and cannot be easily removed from aging stains (darkening, yellowing), and it is necessary to enhance the cleaning effect. When washing was carried out after washing, especially at low water temperatures in winter, the detergent particles were extremely agglomerated, and there was a problem in solubility.

[0003]

SUMMARY OF THE INVENTION According to the present invention, beddings such as clothing, sheets, and umbrella covers, and Y-shirts and blouses that have been stored for a long period of time produce darkening or yellowing, and sometimes produce an unpleasant odor. It is another object of the present invention to provide a pre-soaked detergent composition for clothing having excellent detergency against accumulated sebum stains that cannot be completely removed by ordinary washing.

[0004]

The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have found that an anion such as LAS in a system using a specific nonionic surfactant and a specific sodium carbonate. When pre-soaked and washed without using an activator, a pre-soaked detergent having a high effect on sebum stains and excellent in low-temperature solubility was found, and the present invention was completed. That is, according to the present invention, a) the average alkyl chain length is 12 to 14;
A polyoxyethylene chain having 4 to 10 and a polyoxypropylene chain having 0 to 5; a nonionic surfactant having 12 to 35% by weight; b) 25 to 50% by weight of heavy sodium carbonate; Provided is a pre-soaked detergent composition characterized by being substantially free of a surfactant.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Skin shirts, blouses and Y-shirts that have been stored for a long period of time may experience a case where the accumulated sebum stains are oxidized to cause yellowing and smell, thereby significantly impairing the appearance. These sebum stains contain a large amount of unsaturated triglycerides and long-chain fatty acids, and are very hydrophobic and water-insoluble, so they cannot be easily removed with ordinary detergents and washing conditions. Was common. However, when immersed in cold winter water, detergent particles aggregate,
This causes a problem in solubility. In addition, we found that when pre-soak cleaning was performed using a detergent containing an anionic surfactant, calcium salts derived from the anionic surfactant were formed during pre-soaking and hindered the solubility of the detergent particles. .

According to the present invention, by using a nonionic surfactant having a specific structure and a specific sodium carbonate, and immersing and washing without using an anionic surfactant, the clothing is not damaged. It has been found that dirt is effectively removed and the solubility at low temperatures is excellent. In particular, as a method of using this detergent, before the main washing, a predetermined amount of the present agent is dissolved in a washing machine or a bucket, and the clothes contaminated with sebum are soaked for 30 minutes to overnight, and then the main washing is performed as it is. Alternatively, it is preferable to wash by adding a normal powder or liquid detergent, and a higher detergency can be obtained by pre-soaking with bath water or hot water. Even if it is put together with laundry and washed as usual like a normal powder detergent, the same effect as a normal detergent is obtained, and high sebum detergency cannot be obtained.

The nonionic surfactant of component a) used in the present invention is an alkylene oxide adduct of a higher alcohol, which may be saturated or unsaturated, linear or branched. good. In general, nonionic surfactants are known to have a higher solubilizing ability for oily substances than anionic surfactants, and have an average alkyl chain length of C12 to 14, and a shorter alkylene oxide chain length (HLB). Smaller) has higher solubilization performance. However, when the EO chain length is less than 4, there is a problem that the solubility in water is remarkably deteriorated and the EO chain length does not function as an activator. Solubilized. On the other hand, the alkylene oxide-added nonionic surfactant used in the present invention has an EO chain length of 4 to 10, preferably 5 to 8, more preferably 5 to 7, and a polyoxypropylene chain of 0. ~ 5 mol, preferably 2-5 mol, more preferably 2
Up to 4 moles of oily soil can be effectively removed by increasing the hydrophobicity as much as possible within a range where water solubility can be imparted. Further, the polyoxyethylene chain and the polyoxypropylene chain may be used alone, or may be copolymerized or mixed. Further, it is more effective if the ethylene oxide chain has a narrow molecular weight distribution as described in JP-A-3-265695. These can be produced by the method described in JP-A-1-16437. Further, the average carbon chain length needs to be 12 or more on average from the viewpoint of oil solubilizing ability, and if the average carbon chain length is less than 12, the washability of oily dirt decreases. On the other hand, if the average length is 15 or more, the solubility is greatly reduced. The compounding amount is 12 to 35% by weight, preferably 12 to 30% by weight.
When the content is less than 12% by weight, the detergency decreases, and when it exceeds 36%, the fluidity and stability of the detergent particles are deteriorated due to the liquid state, so that a large amount of impregnating agent such as white carbon does not contribute to the detergency. There is a problem that you need.

The bulk specific gravity of the heavy sodium carbonate as the component (b) used in the present invention is 1 g / ml or more, preferably 1.0 g / ml or more.
5 g / ml or more. This sodium carbonate not only has a high ability as an alkaline agent but also has a low cohesiveness in low-temperature water, and thus has a feature of enhancing the low-temperature solubility of the detergent. Moreover, the compounding quantity can be mix | blended 25-50 weight%, Preferably it is 30-50 weight%. If the amount is less than 25% by weight, the detergency decreases, and if it exceeds 50% by weight, the low-temperature solubility decreases.

It is important that the presoaked detergent composition of the present invention does not substantially contain an anionic surfactant which is usually blended. When an anionic surfactant is added, a calcium salt is formed at the time of pre-soaking, which inhibits the solubility of the detergent particles and causes a problem. The substance in the present invention is 0.5% by weight.
Means less than.

The presoaked detergent composition of the present invention may contain a metal-trapping component in addition to the above components. these,
Examples of the metal scavenger include A-type zeolite, P-type zeolite, tripolyphosphate, ethylenediaminetetraacetate, diethylenetriaminepentaacetate, nitrilotriacetate, 1-type
Examples thereof include inorganic phosphorus compounds such as hydroxyethane-1,1-diphosphonate and the like, and organic phosphates such as polyphosphonic acid and phytic acid. Particularly preferred as the metal scavenger in the presoaked detergent composition is P-type zeolite,
The ratio of silicon to aluminum is 1.33 or less, preferably 0.9 to 1.33, more preferably 0.9 to 1.20. Aluminosilicate is at least 160m / g of anhydrous aluminum silicate
Those having calcium binding performance of g CaO are preferred.
Also, the particle size preferably has a d50 in the range of 0.1 to 5.0 microns, preferably up to 1.0 micron, a d80 of less than 1 micron and a d90 of less than 3 microns. Such P-type zeolites include:
Japanese Patent Application Laid-Open No. 02-173094 can be used.
Commercially available as osil A24. P-type zeolites have a higher impregnating property of a liquid nonionic surfactant than A-type zeolites, and thus have a feature of improving the fluidity and stability of powder. Usually, the pre-soaked detergent composition of the present invention contains 20
It is preferable to mix it by 50 to 50% by weight, particularly preferably 25 to 40% by weight.

Further, the presoaked detergent composition of the present invention comprises a protease, a carbohydrate-degrading enzyme, a percarbonate, a perborate, an organic peracid precursor, and a metal supplement, which are usually added to a detergent and a bleaching agent. , A re-staining agent, a fluorescent agent, a fragrance, and the like. In addition, those blended in a bleaching agent can also be blended. As an enzyme,
There are Cannase 12T, Savinase 12T, Evalase 8T, Lipolase Ultra, Cellulase, Amylase 60T, etc., manufactured by Novo Nordisk Bioindustry, and usually 0.1 to 2% by weight. As other components, sodium silicate, sodium sulfite, sodium sulfate, and magnesium sulfate can be used as inorganic salts. Usually, 1 to 30% is used in a detergent.
5% to 25% is preferred. Sodium percarbonate as percarbonate, monohydrate of sodium perborate as perborate,
There is tetrahydrate, and from the viewpoint of stability,
It is preferable to use those described in Japanese Patent Publication No. Examples of the organic peracid precursor include an alkanoyloxybenzene derivative and TAED which is widely used in Europe. From the viewpoint of stability, JP-A-09-241689 and JP-A-09-310
It is preferable to mix a granulated product using PEG or the like described in JP-A-271. Examples of the anti-staining agent include polyvinyl alcohol, carboxymethyl cellulose, and the like, and examples of the optical brightener include binaphthyl type (Tinopearl C).
BS-X, Ciba Specialty Chemicals) or stilbene type (Tinopearl AMS-GX). As the fragrance, those described in JP-A-4-11699 can be used. In addition, impurities derived from raw materials may be contained as long as they do not adversely affect the performance. sodium methyl sulfate contained in α-sulfofatty acid methyl ester salt,
Sodium methanesulfonate, α-sulfofatty acid disalt,
There are acrylic acid and maleic acid monomers or salts thereof contained in a copolymer (salt) of acrylic acid and maleic acid, higher alcohols contained in nonionic surfactants, polyethylene glycol (molecular weight 200 to 5000), and the like.
Any of these may be contained in the pre-soaked detergent composition in an amount of less than 0.5% by weight. Further, the presoaked detergent composition of the present invention can be prepared by a stirring granulation method as disclosed in JP-A-05-209200, or by a method described in JP-A-61-209200.
It can be manufactured by a rolling granulation method such as -89300.

[0012]

[Effects of the present invention] The present invention is intended for use in beddings such as clothing, sheets, and umbrella covers, as well as Y-shirts and blouses stored for a long period of time, when darkening or yellowing occurs and sometimes unpleasant odors are generated. A pre-soaked detergent composition for clothing having excellent detergency against accumulated sebum stains that cannot be completely removed by ordinary washing can be provided.

[0013]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto. Examples 1 to 19 and Comparative Examples 1 to 6 JP-A-61-89300 having compositions shown in Tables 4, 5, 6, and 7
Various pre-soak compositions were prepared in accordance with the method described in Japanese Patent Application Publication No. H10-115, and their sebum dirt cleaning properties and low-temperature solubility were evaluated according to the following criteria. The results are shown in Tables 4, 5,
6 and 7.

<Evaluation Method of Accumulated Sebum Soil Detergency> 1) Preparation of Accumulated Sebum Soil Contaminated Fabric 1.7 g of Nitta Gelatin and 0.43 g of common salt are dissolved in 3 L of ion-exchanged water. While stirring this solution with a homogenizer, 15 g of an oily soil component shown in Table 1 was gradually added to prepare a soil solution. The cotton knit which has been extracted and washed with ethanol / chloroform in advance and cut is soaked for 10 seconds. Cloth removed from dirty liquid at 105 ° C for 1 hour
dry. The evaluation cloth thus treated was washed with a cloth detergent model detergent solution shown in Table 2 for 10 minutes and rinsed for 3 minutes.
After 1 minute of dehydration, natural drying was performed. As described above, the immersion, drying, washing, and drying in the above steps were repeated a total of five times to obtain an accumulated sebum stained cloth.

[0015]

[Table 1]

[0016]

[Table 2]

2) Evaluation of detergency of accumulated sebum stains 5 × 5 cm20 of accumulated sebum stained cloth prepared by the above method.
Using the detergent compositions shown in Tables 4, 5, 6, and 7,
3DH, volume 30L, detergent concentration 0.0 by tub type washing machine
It was left for 1 hour under the condition of 5% by weight and a temperature of 25 ° C., washed for 10 minutes, and dehydrated for 1 minute. Then, it was rinsed with 3 DH, 25 ° C. water for 3 minutes, dehydrated for 1 minute, and air-dried. The dried washing cloth was extracted with ethanol / chloroform for 8 hours, and the ratio of the extraction amount after washing to the extraction amount of oily stain before washing was defined as the sebum stain cleaning power. In addition, the adjusted accumulated sebum soiled cloth 5 × 5 cm
Cut 10 sheets diagonally in half and OI without cleaning
L VIOLET: Fat Red 7B solution (OIL
VIOLET / ethanol / water = 0.8635 g / 13
Immersion in ethanol / water solution (13 mL).
(00mL / 700mL) and water.
Non-heat drying was performed. On the other hand, the detergent compositions shown in Tables 4, 5, 6, and 7 were used, and a 3 ° D.
H, an amount of 30 L, a detergent concentration of 0.05% by weight and a temperature of 25 ° C. were kept for 1 hour, washed for 10 minutes, and dehydrated for 1 minute. Then, it was rinsed with water at 3 ° DH and 25 ° C. for 3 minutes, dehydrated for 1 minute, and air-dried. The dried washing cloth was dyed by the above method.
The a value of the unwashed cloth and the washed cloth was measured with a reflectometer, and the difference (Δa) was defined as the sebum dirt cleaning power by a coloring method. Since the a value is proportional to the amount of sebum remaining on the cloth, Δa
The larger the value, the higher the detergency.

<Measurement of Low-Temperature Solubility of Granular Detergent Sample> Seven cotton shirts, two polyester shirts, and two acrylic shirts are folded and overlapped, and this is added to tap water 30 of 5 ° C.
Float gently in a two-tank washing machine with an L. 40 g of a sample detergent is gently placed on the shirt, left for 1 hour, and then stirred for 10 minutes with a weak stream of water. After draining, the fabric is gently dewatered to pick up any remaining detergent particles on the fabric and in the washing machine. The amount of undissolved detergent particles is evaluated by a five-point method according to the following criteria. The above experiment is performed three times to obtain an average score. 1 point: almost no undissolved residue 2 points: slightly undissolved residue (2 to 3 mm particles
3 points) Recognized 3 points: About 5 particles remaining undissolved (particles of about 1 to 5 mm) Recognized 4 points: About 10 particles undissolved (particles of about 1 to 5 mm)
Recognized 5 points: 10 or more undissolved particles (including particles of 5 mm or more) are recognized

The abbreviations and details of the presoaked detergent compositions shown in Tables 4, 5, 6, and 7 are as follows. Note that n
Represents the average addition mole number of ethylene oxide, and m represents the average addition mole number of propylene oxide.

[0020]

[Table 3]

LAS: C10-C14 sodium linear alkyl benzene sulfonate AS: C12-C14 sodium alkyl sulfate Soap: C8-C18 fatty acid sodium P-type zeolite: DOSI manufactured by Crossfield Corporation
L-A24 (average particle size: 2 μm) A-type zeolite: manufactured by Mizusawa Chemical Co., Ltd. (average particle size: 5 μm) AC / MA-Na: Sodium acrylate / sodium maleate copolymer (Sokaran CP7 from BASF) Fluorescent agent CBS : Tinopearl CBS-X (manufactured by Ciba Specialty Co., Ltd.) Fluorescent agent AMS: Cinopearl AMS-GX (manufactured by Ciba Specialty Co., Ltd.) Sodium percarbonate: Mitsubishi Gas Chemical Co., Ltd. (SPC-D): average particle size 600 μm Enzyme: Cannase 12T Organic peracid precursor 1: 4-decanoyloxybenzoic acid (manufactured by Mitsui Chemicals, Inc.) manufactured by Novo Nordisk Bioindustry Company Organic peracid precursor 2: decanoyloxybenzenesulfonic acid White carbon : Tokusil N (Tokuyama Corporation) Heavy sodium carbonate: Granulated ash (1.1 g / m, made by Asahi Glass)
l) Light sodium carbonate: Light ash made by Asahi Kasei (0.56 g / m
l)

[0022]

[Table 4]

[0023]

[Table 5]

[0024]

[Table 6]

[0025]

[Table 7]

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B155 AA13 BB08 GA01 GA28 3B201 AB45 BB94 CA01 4H003 AC08 AC23 BA09 DA01 EA16 EA20 EA28 EB09 EB22 EB32 EC01 ED02 EE05 FA15 FA38 FA43

Claims (1)

[Claims] 1. A) 12 to 35% by weight of a nonionic surfactant having an average alkyl chain length of 12 to 14, polyoxyethylene chains of 4 to 10 and polyoxypropylene chains of 0 to 5, b) heavy carbonic acid A composition containing 25 to 50% by weight of sodium, wherein the composition is substantially free of an anionic surfactant.