KR100517164B1 - Composition of laundry detergent having a fabric softening effect - Google Patents

Abstract

The present invention relates to a laundry detergent composition capable of imparting a fiber softening effect, comprising: 0.1 to 15 parts by weight of a cationic surfactant coated with a water-soluble polymer; 5 to 20 parts by weight of anionic surfactant; 5 to 30 parts by weight of nonionic surfactant; Bentonite 1 to 20 parts by weight; And 0.3 to 10 parts by weight of a fluorescent brightener. When washing using the laundry detergent composition according to the present invention, not only the fiber softening effect is sufficiently given at the same time as washing, but yellowing does not occur or the whiteness does not change even after continuous repeated washing.

Description

Composition of laundry detergent having a fabric softening effect

The present invention relates to a laundry detergent composition capable of imparting a fiber softening effect, and more particularly, not only the fiber softening effect is sufficiently given at the same time as washing, but also washing does not change yellowness or whiteness after washing repeatedly. It relates to a detergent composition.

At the same time, efforts have been made to develop laundry detergents to give flexibility to clothing. In order to impart a softening effect to the laundry detergent, a surfactant is usually used as a quaternary ammonium salt. These cationic surfactants are attached to clothes to exert a softening effect. On the other hand, generally, cationic surfactants and anionic surfactants cannot be added to a laundry detergent at the same time. This is because cationic surfactants and anionic surfactants are difficult to dissolve in water because they are changed into a form of a large hydrophobic molecule by saponification by ionic bonds, and thus, detergency is lowered. In addition, in order to give a flexible effect on clothes, cations are present in the wash water, so that the clothes must be adsorbed during the washing and rinsing process.

For this reason, a laundry detergent containing a cationic surfactant and a nonionic surfactant which does not bind with a cationic surfactant has been proposed as a conventional laundry detergent having a fiber softening effect. For example, US Pat. No. 4,239,659 discloses a laundry detergent having a fiber softening effect using an alkyl polyethoxylate nonionic surfactant and a cationic surfactant having a single long-chain hydrocarbon chain simultaneously. U.S. Patent No. 4,770,815 discloses a laundry detergent having a fiber softening effect using a nonionic surfactant, a cationic surfactant, and clay.

However, cationic surfactants not only have a problem of remaining white in clothing as they are oxidized or changed into nitrogen compounds by self-decomposition over time, and yellowing occurs when white clothing becomes yellow as the cationic surfactant accumulates in the clothing. Done. In addition, when a fluorescent brightener having an anion charge is used in a laundry detergent, a cationic surfactant is combined with the fluorescent brightener to reduce whiteness. In the conventional washing process, the softening agent used separately at the last rinse does not cause a yellowing problem even after repeated washing. This is because the anionic surfactant and the softening agent in the laundry detergent are combined with each other and are rinsed off by washing water. This is because cationic surfactants do not accumulate in the garment.

In order to solve this problem, U.S. Patent No. 4,062,647 uses no cationic surfactants at all, and uses dispersibility and hygroscopicity, which are characteristic of smectite clay, using nonionic surfactants and anionic surfactants as main raw materials. A technique that gives a softening effect and an antistatic effect of clothing is disclosed. However, these laundry detergents that do not use cationic surfactants are difficult to be commercialized due to problems such as deterioration of fiber softening effect and antistatic function, compared to conventional detergents using cationic surfactants.

US Pat. No. 4,898,680 discloses a laundry detergent that coats the cation surface with a hydrophobic material to prevent the formation of a complex with an anionic surfactant in the product. In the washing process, the cationic surfactant is not dissolved in water due to the water-insoluble coating material, but after dehydration, the coating material is heat-recorded by the hot air of the dryer. This is an example of a flexible effect. This case can be said to solve the problem of yellowing and whiteness degradation, but it does not have the disadvantage that can not expect the softening effect for consumers who do not actually use the dryer.

As described above, the conventional laundry detergent having a fiber softening effect is insignificant enough to not recognize the fiber softening effect, or the yellowing and the whiteness deterioration accumulated in the clothes due to the repeated washing cannot be overcome.

Accordingly, the technical problem to be achieved by the present invention is to solve the above problems, to provide a laundry detergent composition that is not only given a sufficient flexibility of the fiber and at the same time washing, but also does not yellow or change the whiteness of the laundry even after repeated repeated washing. .

In order to achieve the above technical problem, the present invention is 0.1 to 15 parts by weight of a cationic surfactant coated with a water-soluble polymer; 5 to 20 parts by weight of anionic surfactant; 5 to 30 parts by weight of nonionic surfactant; Bentonite 1 to 20 parts by weight; And 0.3 to 10 parts by weight of a fluorescent brightener; provides a laundry detergent composition containing.

In the laundry detergent composition according to the present invention, it is preferable to use a quaternary ammonium compound represented by the following formula (1) or an imidazonium quaternary salt represented by the following formula (2) as the cationic surfactant.

In Formula 1, R 1 and R 2 are each independently selected from the group consisting of -CH ₃ , -CH ₂ CH ₃ , -CH ₂ OH, and -CH ₂ CH ₂ OH, and R3 and R4 are independently of each other. Any one selected from the group consisting of lauryl, myristyl, palmityl, oleyl and stearyl, X is chloride or methylsulfate.

In Formula 2, R1 and R2 are independently selected from the group consisting of lauryl, myristyl, palmityl, oleyl and stearyl.

In addition, in the laundry detergent composition according to the present invention, as the water-soluble polymer, water-soluble polyethylene, ethylene-acrylic acid copolymer, polyamide, polyethylene-vinyl acetate copolymer, silicone-based polymer, polyvinyl alcohol, polyethylene glycol may be used. have.

In addition, the laundry detergent composition according to the invention 10 to 70 parts by weight of alkali builders; And 5 to 40 parts by weight of an emollient; may be further added, and 0.01 to 0.5 parts by weight of an enzyme is preferably added.

Hereinafter, the laundry detergent composition having the fiber softening effect of the present invention will be described in detail.

The laundry detergent composition of the present invention contains 0.1 to 15 parts by weight of a cationic surfactant coated with a water-soluble polymer. Due to the water-soluble polymer coated on the cationic surfactant, the cationic surfactant is prevented from being combined with the anionic surfactant and the fluorescent brightener in the laundry detergent at the beginning of washing, so that the anionic surfactant acts on the contamination first, thus degrading the cleaning power. It does not prevent the binding with the fluorescent brightener in the anionic form, so as not to reduce the whiteness. In the later stage of washing, the coated water-soluble polymer is dissolved in water and completely removed, so that the cationic surfactant is sufficiently attached to the clothes to give a softening effect. Therefore, the water-soluble polymer coated on the cationic surfactant should be able to be completely dissolved later in the laundry, which can be controlled by changing the type and coating thickness of the water-soluble polymer. Preferably, the coating layer of the water-soluble polymer is adjusted to be completely dissolved within 10 minutes to 1 hour depending on the type of laundry. As the cationic surfactant, any fabricating cationic surfactant capable of imparting a fiber softening effect to clothing and having a water-soluble polymer can be used, but a quaternary ammonium compound represented by the following formula (1) or an already represented by the following formula (2) It is preferable to use dazonium quaternary salts.

<Formula 1>

In Formula 1, R 1 and R 2 are each independently selected from the group consisting of -CH ₃ , -CH ₂ CH ₃ , -CH ₂ OH, and -CH ₂ CH ₂ OH, and R3 and R4 are independently of each other. Any one selected from the group consisting of lauryl, myristyl, palmityl, oleyl and stearyl, X is chloride or methylsulfate.

<Formula 2>

In Formula 2, R1 and R2 are independently selected from the group consisting of lauryl, myristyl, palmityl, oleyl and stearyl.

In addition, the water-soluble polymer coated on the cationic surfactant may be water-soluble polyethylene, ethylene-acrylic acid copolymer, polyamide, polyethylene-vinyl acetate copolymer, silicone-based polymer, polyvinyl alcohol, polyethylene glycol, and the like. As for the molecular weight, the polyethyleneglycol of 1,000-100,000, the polyvinyl alcohol, the polyethylene of 500-20,000 can be used, As for the coating thickness, 0.01-10 micrometers is preferable, More preferably, it is 0.1-1 micrometer. As a method of coating a cationic surfactant with a water-soluble polymer, a known coating method may be used. For example, the cationic surfactant dissolved at high temperature may be granulated through a cold spray dryer, and then fluid A water-soluble polymer may be coated using a bed, or noodle is coated using a cationic surfactant and a binder, followed by coating using a fluid bed.

In addition, the laundry detergent composition of the present invention contains 5 to 20 parts by weight of anionic surfactant. As the anionic surfactant, anionic surfactants commonly used in laundry detergent compositions may be used. Anionic surfactants are specifically lauryl benzene sulfonate, alpha-olefin sulfonate, sodium lauroyl sulfate. Sodium lauroyl detoxylated sulfate and the like.

In addition, the laundry detergent composition of the present invention contains 5 to 30 parts by weight of the nonionic surfactant. Nonionic surfactants include anionic surfactants commonly used in laundry detergent compositions, such as polyoxyethylene alkyl ethers, coconut diethanolamides, fatty acid alkanolamines, amine oxides, alkyl polyglucosides, kenyl polyethylene alkyls. Ethers, sugar ethers and the like can be used.

In addition, the laundry detergent composition of the present invention contains 1 to 20 parts by weight of bentonite. Bentonite is a material used as an inorganic softener, and it is swellable when dispersed in water, and has a feature of deeply entering clothing in the form of ise particles. In addition, the strong absorbency gives flexibility and antistatic function after washing. Bentonite has Na-type and Ca-type, but mainly produced in Korea is Ca-type. It is preferable to use Na-type because Na-type is relatively superior to Ca-type in absorbency and swelling property.

In addition, the laundry detergent composition of the present invention contains 0.3 to 10 parts by weight of the optical brightener. Fluorescent dyes mainly used in laundry detergents include biphenyl compounds and stilbene compounds, and amphoteric or nonionic fluorescent dyes may be used. Biphenyl-based or stilbene fluorescent dyes have an anionic charge, and thus have a property of binding to cationic surfactants, thus affecting whiteness when used in conventional laundry detergents, and have no effect of improving yellowing. However, since the cationic surfactant is coated with the water-soluble polymer in the laundry detergent of the present invention, the use of such anionic fluorescent dyes does not affect the whiteness.

Meanwhile, an alkali builder and a softener may be optionally added to the laundry detergent composition of the present invention as needed.

Alkali builders can be used soda ash, sodium bicarbonate (sodium bicarbonate), forget-me-not, and the like, the proper combination of these can prevent the rise of the pH of the product, it can prevent the dye transfer phenomenon that may occur during high temperature washing. . Soda ash not only has the function of making inorganic particles easy to remove by giving alkali to powder granulation and powder detergent, and also neutralizes acidic substances in dry manufacturing process. In addition, sodium bicarbonate is used as a pH adjuster because it is characterized by a low pH by replacing sodium and hydrogen in soda ash serves as a pH buffer of the wash water. Forget-me-not is also one of the main detergents used to control pH of products. It is preferable to add 10-70 weight part of such alkali builders.

As a softener, a zeolite commonly used may be exemplified, and among various types of zeolites, it is preferable to use Zeolite 4A type and Zeolite p type, and the difference between them is in particle size and powder properties. Although somewhat different, it may be optionally used for the preparation of detergent compositions and for the desired product design. The content of the softener is preferably 5 to 40 parts by weight.

In addition, the laundry detergent composition of the present invention is protease (protease) used for protein contamination, lipase (lipase) used for lipid contamination, carbohydrate degrading enzyme (amylase) for food contamination, lint of cotton fiber An enzyme such as cellulase mainly used for removal may be further included, and a preferable content is 0.01 to 0.5 parts by weight.

In addition to the above components, other components such as anti-inflammatory agents may be further added without departing from the object of the present invention.

Hereinafter, the present invention will be described in detail with reference to Examples. However, embodiments according to the present invention can be modified in many different forms, the scope of the present invention should not be construed as limited to the embodiments described below. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

Examples 1-2 and Comparative Examples 1-2

To prepare a powder detergent in accordance with the components and proportions shown in Table 1. Powder detergent was prepared by the conventional method of mixing the raw material components except the additive to prepare a granular powder and then mixing the remaining additives.

In Table 1, as the cationic surfactant (**) of the quaternary ammonium compound of Comparative Example 1, uncoated dimethyl distearyl ammonium chloride was used, and the quaternary ammonium compound cations of Examples 1 and 2 were used. As the surfactant (*), the same material as that of the quaternary ammonium compound of Comparative Example 1 was used, but the coating was treated with a water-soluble polymer, water-soluble polyethylene glycol, and its coating thickness was 0.3 μm. The fluorescent dye is Tinopal CBS-X manufactured by Ciba Specialty Chemical Co., Ltd., and the protease is Savinase 12.0T manufactured by Novozymes, the cellulose degrading enzyme is Carezyme 900T manufactured by Novozymes, and the carbohydrate is Novozymes. Manufacture Termamyl 120T.

Yellowing and whiteness prevention effect evaluation

Yellowing is a problem caused by repeated washing, so it must be evaluated by repeated washing so that the correct evaluation is performed. Therefore, it is not a preferable method to evaluate the actual clothes by using a general evaluation device, the Terg-O-Tometer, so the evaluation was performed by repeated washing using a general washing machine or a drum type washing machine directly. . The clothes and fabrics to be used to examine the yellowing were described in Table 2 below in terms of size, number of uses and evaluation purposes, and pretreatment conditions of the clothes and fabrics.

The white towels were used to evaluate the flexibility of the white towels used in Table 2, and the white color was used to determine the whiteness of the fluorescence-treated garments. This is to prepare for the change in the whiteness that occurs. Yellowing is intensified with increasing b-value measured by the color difference meter, and as the yellowing decreases, it develops to a color close to blue. In addition, in order to measure the whiteness, the whiteness of the fluorescent agent was measured by measuring the Ganz whiteness using a color difference meter. The yellowing and whiteness prevention effects of the laundry detergents of Examples and Comparative Examples were measured and shown in Table 3 below.

As can be seen in Table 3, Examples 1 and 2 can be seen that yellowing does not occur at a level similar to Comparative Example 1 without using a cationic surfactant. On the other hand, in Comparative Example 2, it can be confirmed that yellowing occurs. The same phenomenon can be seen in the degree of whiteness. That is, in the laundry detergents of Examples 1 to 2, since the cationic surfactant is coated with the water-soluble polymer, the binding of the anionic surfactant and the anionic fluorescent agent is blocked, so that the cationic surfactant is not bound to the cation, and the washing detergent remains in the conventional washing process. Since cationic surfactants and anionic surfactants bind, cationic surfactants do not accumulate, and yellowing does not occur.

Textile Flexible Effect Evaluation

Hereinafter, in order to evaluate the flexibility of the laundry washed with the laundry detergent prepared according to the Examples and Comparative Examples, a professionally selected panel to evaluate the flexibility. Flexibility evaluation was measured based on the following 5-point measure for 10 professional evaluators using the white towel in Table 2. These towels are washed at least 5 times at room temperature using a detergent containing an anionic surfactant as a main ingredient after purchase, and additionally washed 3 times without detergent, at 20% RH, 25 ℃ for one day at a place where constant temperature and humidity Dried towels were used.

<5-point measurement standard>

1 point: no flexibility

2 points: Insufficient flexibility

3 points | pieces: Flexible but moderate level

4 points: Feeling flexible and in good condition

5 points: Feeling flexible and satisfied

Table 4 shows the average value of the results of the flexibility evaluation.

As shown in Table 4, Examples 1 to 2 it can be seen that there is a high fiber flexibility compared to Comparative Example 1, which is determined by the presence or absence of a cationic surfactant. Comparative Example 2 has a high fiber flexibility, but as shown in Table 3 above, there is a problem in yellowing and whiteness.

Detergency Test

Evaluation of the cleaning power was evaluated using a washing machine under the same conditions, and the evaluation conditions were used for the general tap water, the temperature was set to 40 ℃ during washing and after washing the rinsing process did not specifically set the temperature. Thirty grams of each detergent prepared in Examples 1 and 2 and Comparative Examples 1 and 2 were put in a washing machine, and the 5 × 5 cm size of the Japan Laundry Science Association contaminated cloth (20 sheets) had the actual clothing form. -Staining cloth was attached to the shirt. After doing this, after washing with a standard course of the washing machine, the dehydrated contaminated cloth was dried in a constant temperature and humidity room (25 ° C., 20% RH) for 1 day, and ironed, and the Wb value was measured by a color difference meter. Using a color difference meter, the pre-measured pre- and post-Wb values of the contaminated cotton cloth were substituted into the Kubelka Munch equation represented by Equation 1 below to calculate the washing power, and the results are shown in Table 5 below.

In Equation 1, R _s is the surface reflectivity of the contaminated cotton cloth, R _c is the surface reflectivity of the cotton cloth after decontamination, and R _o is the surface reflectivity of the white cotton cloth.

When the cationic surfactant is used, the washing power is generally lowered. However, when the nonionic surfactant is added together as in Examples 1 and 2 and Comparative Example 2, the removal ability of the organic oil component by the nonionic surfactant is excellent. The result is equivalent to the general detergent of 1. As a result of analyzing these values using statistical tools, there was no significant difference.

As described above, the laundry detergent composition according to the present invention is not only imparted with sufficient fiber softening effect at the same time as washing, and does not yellow or change the whiteness of the laundry even after continuous repeated washing. In addition, since the cleaning power is comparable with the existing detergent, it is useful as a laundry detergent composition which simultaneously imparts a fiber softening effect.

Claims (8)

0.1 to 15 parts by weight of a cationic surfactant coated with a water-soluble polymer; 5 to 20 parts by weight of anionic surfactant; 5 to 30 parts by weight of nonionic surfactant; Bentonite 1 to 20 parts by weight; And 0.3 to 10 parts by weight of a fluorescent brightener; laundry detergent composition comprising a. The laundry detergent composition according to claim 1, wherein the cationic surfactant is a quaternary ammonium compound represented by the following Chemical Formula 1 or an imidazonium quaternary salt represented by the following Chemical Formula 2. <Formula 1> In Formula 1, R 1 and R 2 are each independently selected from the group consisting of -CH ₃ , -CH ₂ CH ₃ , -CH ₂ OH, and -CH ₂ CH ₂ OH, and R3 and R4 are independently of each other. Any one selected from the group consisting of lauryl, myristyl, palmityl, oleyl and stearyl, X is chloride or methylsulfate. <Formula 2> In Formula 2, R1 and R2 are independently selected from the group consisting of lauryl, myristyl, palmityl, oleyl and stearyl. The method of claim 1, wherein the water-soluble polymer is any one or more selected from the group consisting of polyethylene, ethylene-acrylic acid copolymer, polyamide, polyethylene-vinyl acetate copolymer, silicone-based polymer, polyvinyl alcohol and polyethylene glycol Laundry detergent composition. The method of claim 1, wherein the coating layer made of a water-soluble polymer is a detergent composition, characterized in that 0.01 to 10㎛. The method of claim 1, wherein the anionic surfactant is at least one selected from the group consisting of lauryl benzene sulfonate, alpha-olefin sulfonate, sodium lauroyl sulfate and sodium lauroyl detoxylated sulfate. Detergent composition. The nonionic surfactant according to claim 1, wherein the nonionic surfactant is any one selected from the group consisting of polyoxyethylene alkyl ether, coconut diethanolamide, fatty acid alkanolamine, amine oxide, alkyl polyglucoside, kenyl polyethylene alkyl ether, and sugar ether. The laundry detergent composition characterized by the above. According to claim 1, Alkali builder 10 to 70 parts by weight; And softener 5 to 40 parts by weight; Laundry detergent composition comprising a. The laundry detergent composition of claim 1, further comprising 0.01 to 0.5 parts by weight of enzyme.