JP4493079B2 - Smoothness improver for hand washing - Google Patents

Description

  The present invention relates to a smoothness improving agent for hand-washing laundry. Specifically, by improving the smoothness between the objects to be washed during hand washing, it improves hand washing performance while maintaining the cleaning power, and eliminates hand cuts and scratches caused by rubbing the hand against the object to be washed. The present invention relates to an additive for washing based on a completely new idea for suppression. The present invention also relates to a detergent composition containing the slip property improving agent and a hand-washing washing method in the presence of the slip property improving agent.

  There are two types of washing methods: hand washing and washing machine washing. In recent years, there has been a tendency for washing machine washing to increase due to the widespread use of washing machines, but there are still many needs for hand-washing washing from the viewpoint of stain removal and economic efficiency.

  Therefore, conventionally, detergents having desirable physical properties at the time of hand-washing washing have been developed. For example, as disclosed in Patent Document 1, a method for improving skin irritation during hand-washing by blending an anionic surfactant, a cationic surfactant, and a nonionic surfactant at a specific ratio is disclosed. Has been. Regarding foam control, in general, high foaming surfactants such as LAS and AS are used for foam increase, nonionic surfactants such as polyoxyethylene alkyl ether are used for foam control, and foam breakage during rinsing. It is known to use soap or the like for improving the properties. Specifically, a detergent composition excellent in solubility, foamability and rinsing property by containing anionic surfactant, specific nonionic surfactant, and fatty acid soap listed in Patent Document 2 in a specific ratio Things are disclosed.

However, until now, there has been no investigation focusing on a technique for improving the ease of hand washing (slidability when rubbing an object to be cleaned).
This improvement in slipperiness is a particularly important improvement point when hand-washing laundry using a detergent containing a nonionic surfactant in recent years. Nonionic surfactants have good hard water resistance, outstanding detergency of oily dirt such as sebum dirt, and very good biodegradability. .
Japanese National Patent Publication No. 10-504056 Japanese Patent Publication No. 8-13987

Therefore, the object of the present invention is to improve the smoothness between objects to be washed in hand washing using a detergent composition, thereby facilitating hand washing without impairing detergency, and further enhancing the feel in hand washing, Furthermore, the present invention provides a slipperiness improving agent for hand-washing laundry that can also provide hand care, a detergent composition containing the slippage improving agent, and a washing method that improves the slipping property when objects to be cleaned are rubbed together during hand-washing. There is.
Furthermore, this time, for the first time, we discovered the problem that the smoothness between the objects to be cleaned decreases and the hand washing feeling deteriorates with the increase in the mixing ratio of the nonionic surfactant. It has been found to be particularly useful in the presence.

  In response to the need for easy hand-washing, the present inventors have conducted extensive research focusing on completely new physical properties such as smoothness when rubbing objects to be washed during hand-washing. It has been found that adding a substance at the time of washing can enhance the feel in hand washing without impairing the washing performance, and can also provide hand care, thereby completing the present invention.

That is, the gist of the present invention is as follows.
[1] A smoothness improving agent for hand-washing laundry comprising at least one selected from the group consisting of (a) clay minerals and (b) polysaccharides,
[2] A detergent composition for hand-washing laundry containing the smoothness improving agent according to [1], a surfactant and / or a builder, and [3] in the presence of the smoothness improving agent according to [1]. The present invention relates to a method for washing by hand.

  By using the smoothness improving agent for hand-washing laundry of the present invention, it is possible to improve the smoothness between objects to be washed, especially in the presence of a nonionic surfactant, during hand-washing, and to wash the hands without impairing the washability. This makes it easy to improve the feel of hand washing. Furthermore, as a slipperiness improving agent for hand washing and washing, an effect that hand care can be achieved is exhibited.

  In the present invention, a hand wash laundry slipperiness improver (hereinafter simply referred to as a slipperiness improver) containing at least one selected from the group consisting of (a) clay minerals and (b) polysaccharides is handwashed. Sometimes it is added separately from the detergent composition, or by hand washing with the slipperiness improving agent-containing detergent composition obtained by adding the slippage improving agent to the detergent composition, The smoothness is improved, and the effect of improving hand-washing washability while maintaining the detergency is exhibited. Furthermore, an effect of suppressing hand cuts, scratches, and the like, which are caused by increasing the feel of hand washing at the time of hand washing and by rubbing the hand against the object to be cleaned, a so-called hand care effect is also exhibited.

Below, each component used for this invention is demonstrated.
The smoothness improving agent in the present invention is not limited by the composition, form, manufacturing method, and the like of the detergent composition to be used, and can exert its effect on all detergent compositions.
Examples of the detergent composition include, for example, a detergent composition obtained by the composition and production method described in Japanese Patent Office Gazette 10 (1998) -25 (7159), well-known and commonly used technical collection (powder detergent for clothing).

The detergent composition for hand-washing laundry of the present invention means a detergent composition containing a smoothness improving agent. The detergent composition for hand-washing laundry may be in any dosage form such as powder, granule, liquid, or paste, and may be formed into an aggregate, tablet or the like by secondary processing.
In addition, the washing liquid refers to a liquid for washing such as the detergent composition dissolved or suspended.

1. Smoothness improver
(a) Component Clay minerals Clay minerals are not particularly limited, but are cation-exchange layered silicates that are highly water swellable and hold cationic or polar inorganic or organic substances between crystal structure layers (intercalated layers). To form an interlayer composite. An example of such a clay mineral is a swellable smectite clay mineral. Swellable smectite clay minerals are a group of cation-exchanged layered silicates belonging to clay minerals. Naturally, montmorillonite, well known as the main component of bentonite, beidellite, hectorite, saponite, nontronite. Examples of the composite include swellable fluorine-based mica.
Among these, hectorite and montmorillonite are preferable, and montmorillonite is particularly preferable.
These clay minerals may be used alone or in combination of two or more.

  (a) As a method for adding the component, it is preferably added at the time of manufacturing or washing the laundry composition for hand-washing laundry, and the amount of the component (a) added to the detergent composition is not particularly limited. 5 parts by weight or more, preferably 7 parts by weight or more, more preferably 10 parts by weight or more, and further preferably 15 parts by weight or more with respect to 100 parts by weight of the detergent composition. Is more preferable, and 20 parts by weight or more is particularly preferable. Further, when two or more types are selected from the swellable smectite and used in combination, it is preferable to add 5 parts by weight or more of each agent added to the detergent composition at 100 parts by weight when adding or washing 10 parts by weight. The above is more preferable, and 20 parts by weight or more is particularly preferable. Furthermore, it is preferable that the amount of component (a) added increases as the amount of nonionic surfactant in the detergent composition and the ratio to the total surfactant component increase.

  (a) When a component is added to a detergent composition, the addition method is not particularly limited, but in order to exhibit a sufficient effect as a smoothness improving agent, in the manufacturing process of the detergent composition, the smoothness is improved. An addition method in which the agent is more dispersed in the detergent composition is preferred. For example, in a normal detergent manufacturing process (mixing of a detergent component-containing slurry → spray drying → granulation → surface modification → after blending), an after blending process (detergent components such as fluorescent dyes, enzymes In the step of adding a fragrance, an antifoaming agent, a bleaching agent, a bleaching activator, etc.), the addition in the surface modification step is preferable to the addition of the component (a), and further the granulation step and slurry blending Addition in the process is more preferable. In addition, when a slipperiness improving agent is added to the washing liquid separately from the detergent composition during hand washing, it is used with other bases by extrusion granulation method etc. It is preferable to use it as a mixture. Any other base may be used as long as the base can sufficiently disperse / dissolve the component (a), such as sodium sulfate, zeolite, polyethylene glycol or alkyl sulfate. It can be used as appropriate.

(b) Component polysaccharide
As the polysaccharide (b), a polysaccharide having a sugar skeleton and water solubility is preferable, and specifically, hydroxyethyl cellulose (HEC), carboxymethyl cellulose (CMC), guar gum, hydroxypropyl methyl cellulose (HPMC). ), Hydroxybutylmethylcellulose (HBMC) and the like. Exhibiting solubility in water refers to a state in which an extreme undissolved residue does not occur in an actual use scene. Of these, HEC, CMC and guar gum are preferable, and HEC and CMC are more preferable, and HEC is most preferable from the viewpoints of improvement in smoothness when using the same amount and improvement in foam quality (creamy feeling).

  (b) As a method for adding the component, it is preferably added at the time of manufacturing or washing the laundry composition for hand washing, and the amount of the component (b) added to the detergent composition is not particularly limited. 1 part by weight or more is preferably added with respect to 100 parts by weight of the detergent composition in order to increase the smoothness of the hand and improve washability, and more preferably 3 parts by weight or more, and further preferably 5 parts by weight or more, 10 parts by weight or more is particularly preferable. Moreover, when selecting and using 2 or more types from polysaccharide together, it is preferable that the sum total of each agent addition amount adds 3 weight part or more, and 10 weight part or more is more preferable. Furthermore, it is preferable that the amount of component (b) to be added increases as the amount of nonionic surfactant in the detergent composition and the ratio to the total surfactant component increase.

  (b) When the component is added to the detergent composition, in the addition method, in order to exhibit a sufficient effect as a slipperiness improving agent, the slipperiness improving agent is added to the detergent composition in the manufacturing process of the detergent composition. An addition method in which it is more dispersed is preferable. For example, in an ordinary detergent manufacturing process, an after blending step (a step of adding detergent components such as fluorescent dyes, enzymes, fragrances, antifoaming agents, bleaching agents, bleach activators, etc. to the prepared detergent particles) Thus, the addition in the surface modification step is more preferable than the addition of the component (b), and the addition in the granulation step and the slurry blending step is more preferable.

  In addition, when component (b) is added to the washing liquid separately from the detergent composition during hand-washing, it is used in combination with other bases by extrusion granulation or the like in order to suppress the generation of the step of component (b). It is preferable to use it as a mixture. Any other base may be used as long as the base can sufficiently disperse / dissolve the component (b). For example, sodium sulfate, zeolite, polyethylene glycol, alkyl sulfate, etc. are appropriately used. Can be used.

  In addition, when two or more kinds are selected from the group consisting of the component (a) and the component (b) as a slipperiness improving agent, the required amount of each agent is determined according to the hand washing washing evaluation method described later. It can be determined as appropriate so as to obtain an improvement effect, and the combined use synergizes the effects of the respective agents without canceling each other. Also in this case, the total amount of component (a) and component (b) should be increased as appropriate in accordance with the increase in the amount of nonionic surfactant in the detergent composition and the ratio to all surfactant components. The total amount of each agent added is preferably 3 parts by weight or more, more preferably 5 parts by weight or more, still more preferably 7 parts by weight or more, and particularly preferably 10 parts by weight or more with respect to 100 parts by weight of the detergent composition. .

  The form of the slipperiness improving agent containing the component (a) and / or the component (b) is not particularly limited and may be any dosage form such as powder, granule, liquid or slurry / paste. May be formed into aggregates, granules, tablets, and the like. As these molding methods, known methods can be used.

2. Washing method The washing method of the present invention is a method of washing by hand washing in the presence of the smoothness improving agent of the present invention. For example, the smoothness improving agent is used as a part of the detergent component or separately from the detergent component. The method of adding and washing by hand washing etc. is mentioned.

  In the washing method of the present invention, there are no particular restrictions on the amount of the slipperiness improver used, the washing bath, or the washing temperature, but it is used for a generally sufficient amount of water. For example, with respect to 100 parts by weight of the detergent component, an actual feeling that the smoothness is sufficiently improved can be obtained even if it is 10 parts by weight or less.

  In the present invention, a particularly preferable smoothness improving effect can be evaluated by performing hand-washing under washing conditions according to the following hand-washing washing evaluation method.

<Hand washing evaluation method>
◎ Hand Washing Conditions The evaluation method for hand washing in the present invention will be described below. 2 liters of hard water (Ca / Mg molar ratio 7/3) corresponding to 89.3 mg CaCO ₃ / L adjusted to 25 ° C. is 30 cm in diameter, 13 cm in depth and 8.2 L in capacity of a washbasin made of polypropylene (manufactured by YAZAKI). The slipperiness-improving agent-containing detergent composition filled in and weighed to 15 g is poured into water, and then stirred by hand so that water does not scatter from the basin. Thirty seconds after the start of stirring, a 100% cotton T-shirt (Gunze white, L size) was soaked in the wash water in the wash basin so that the entire T-shirt was sufficiently wet, and then the T-shirt from the back of the T-shirt. Hold the chest with both hands and rub the chests of the T-shirts together. At this time, the parts to be rubbed are removed from the washing water. Every time 3 to 5 times of rubbing, the portion to be rubbed with cleaning water is immersed once. The ease of rubbing at the time of rubbing is determined as smoothness, and it is set to 1-5 rank. When this evaluation is performed only with the above-mentioned adjustment water, the wrinkles of the T-shirt hinder the smoothness, and since there are no bubbles in the rubbing portion, it is very difficult to rub, and the smoothness is poor. This time is assumed to be smoothness: 1. The status of each rank is shown below.
Rank 1: The slipperiness is very low, there is a squeaky feeling, and hand washing is very difficult.
Rank 2: Low smoothness, squeaky feeling, and difficult to wash by hand.
Rank 3: The smoothness is moderate, and there is no feeling of squeezing and it can be washed by hand.
Rank 4: High smoothness, no squeaky feeling and easy to wash by hand.
Rank 5: Very smooth, no squeaky feeling, and easy to wash by hand.
In the above test, the average value of the panel evaluation results of 6 persons is obtained and used as the rank.

  By using the washing method of the present invention having the above-described configuration, it is possible to improve the smoothness when rubbing the objects to be washed at the time of washing by hand, and in addition, without impairing the washability, The effect that the touch in hand washing is enhanced and hand care can be achieved is also exhibited.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, it is not limited to these Examples.

Preparation of detergent composition (Comparative Example 1)
325 kg of water, 200 kg of 50 wt% sodium dodecylbenzenesulfonate aqueous solution 200 kg, 40 wt% of No. 2 silicate aqueous solution 125 kg, sodium carbonate 25 kg, sodium sulfate 217.5 kg, polyethylene glycol 5 kg, dye 2.5 kg, zeolite 100 kg After preparing a homogeneous slurry, the slurry was spray dried to obtain a detergent composition. Table 1 shows the smoothness of the obtained detergent composition. It was a detergent composition having a smoothness rank of 2.

(Comparative Example 2)
A homogeneous slurry is prepared by mixing 465 kg of water, 48 kg of 50 wt% sodium dodecylbenzenesulfonate aqueous solution, 135 kg of 40 wt% sodium polyacrylate aqueous solution, 120 kg sodium carbonate, 60 kg sodium sulfate, 9 kg sodium sulfite, 3 kg dye, and 300 kg zeolite. Obtained. This slurry was spray-dried to obtain base granules.
100 parts by weight of this base granule, 15 parts by weight of a nonionic surfactant, 15 parts by weight of an anionic surfactant and 1 part by weight of polyethylene glycol were stirred and mixed to obtain a detergent composition. Table 1 shows the smoothness of the obtained detergent composition. The detergent composition had a smoothness rank of 1.

Example 1
4.0 kg of the detergent composition obtained in Comparative Example 1 was put into a concrete mixer (manufactured by Koyo Machine Industry Co., Ltd., capacity 40 L), followed by bentonite (detersoft GIB manufactured by Laviosa, composition: montmorillonite 95%, the same applies hereinafter). Was added and mixed at an inclination angle of 30 ° and a rotation speed of 20 r / m for 3 minutes to obtain a slipperiness improving agent-containing detergent composition. Table 1 shows the slipperiness of the obtained slipperiness improving agent-containing detergent composition. This was a detergent composition containing a smoothness improving agent having a smoothness rank of 3.5.

(Example 2)
Bentonite (detersoft GIB from Laviosa, composition: montmorillonite 95%
In the same manner as in Example 1, a detergent composition containing a slipperiness improving agent was obtained except that the amount added was 0.8 kg. Table 1 shows the slipperiness of the obtained slipperiness improving agent-containing detergent composition. This was a detergent composition containing a smoothness improving agent having a smoothness rank of 4.

(Example 3)
0.4kg of bentonite (detersoft GIB made by Laviosa) and 0.086kg sodium lauryl sulfate (Eoal 10 powder made by Kao Co., Ltd.) are put into a high speed mixer (Mitsui Miike Co., Ltd., capacity 2L, with jacket). The mixture was stirred until the temperature of the mixture reached 70 ° C. at 3600 r / m while flowing 80 ° C. warm water through the jacket at 10 L / min. Thereafter, 0.086 kg of polyethylene glycol (K-PEG6000, manufactured by Kao Corporation) heated to 70 ° C. in advance was added and stirring was continued for 3 minutes, and then the mixture was extracted. Next, the obtained mixture was extruded through a screen having a pore diameter of φ1 mm by an extrusion granulator (Dalton Co., Ltd., Dome Gran) and consolidated. After cooling the obtained extrudate, it was crushed with a granulator (Power Mill manufactured by Dalton Co., Ltd.), and a smoothness improver granulated product (70% bentonite, 15% sodium lauryl sulfate, 15% polyethylene glycol) )

  Table 1 shows the smoothness when the detergent composition obtained in Comparative Example 1 and the above-described smoothness improver granulated product were added so as to have the ratio shown in Table 1 during hand washing. It was a smoothness improving agent granulated product having a smoothness rank of 3.5.

Example 4
In the same manner as in Example 1, 4.0 kg of the detergent composition obtained in Comparative Example 2 was charged into a concrete mixer, and then 0.8 kg of bentonite (ground product: average particle size 20 μm) was added, and the inclination angle was 30 °. The mixture was mixed for 3 minutes at a rotational speed of 20 r / m to obtain a slipperiness improving agent-containing detergent composition. Table 1 shows the slipperiness of the obtained slipperiness improving agent-containing detergent composition. Smoothness rank: A detergent composition containing a smoothness improving agent of 3.

(Example 5)
In the production process of Comparative Example 2, bentonite (ground product: average particle size 20 μm) in the ratio shown in Table 1 was simultaneously added to the step of stirring and mixing the base granule and the mixed solution (surface modification step). The smoothness of the detergent composition containing detergent is shown in Table 1. This was a detergent composition containing a smoothness improving agent having a smoothness rank of 4.

(Example 6)
4.0 kg of the detergent composition obtained in Comparative Example 1 was put into a concrete mixer (manufactured by Koyo Machine Industry Co., Ltd., capacity 40 L), followed by addition of 0.12 kg of hydroxyethyl cellulose (manufactured by Hercules: NATROSOL250HHX) By mixing at an angle of 30 ° and a rotation speed of 20 r / m for 3 minutes, a slipperiness improver-containing detergent composition was obtained. Smoothness rank: A detergent composition containing a smoothness improving agent of 3.

(Example 7)
A slipperiness improving agent-containing detergent composition was obtained in the same manner as in Example 9, except that the amount of hydroxyethyl cellulose added was 0.4 kg. Table 1 shows the slipperiness of the obtained slipperiness improving agent-containing detergent composition. It was a detergent composition containing a smoothness improving agent having a smoothness rank of 5.

(Example 8)
4.0 kg of the detergent composition obtained in Comparative Example 1 was put into a concrete mixer (manufactured by Koyo Machine Industry Co., Ltd., capacity 40 L), followed by addition of 0.4 kg of carboxymethylcellulose (Nippon Paper Industries Co., Ltd .: F10MC), A detergent composition containing a slipperiness improving agent was obtained by mixing for 3 minutes at an inclination angle of 30 ° and a rotational speed of 20 r / m 2. Table 1 shows the slipperiness of the obtained slipperiness improving agent-containing detergent composition. It was a slipperiness improving agent-containing detergent composition having a slippage rank of 3.

Example 9
4.0 kg of the detergent composition obtained in Comparative Example 1 was put into a concrete mixer (manufactured by Koyo Machine Industry Co., Ltd., capacity 40 L), followed by 0.2 kg of bentonite (detersoft GIB manufactured by Laviosa) and carboxymethylcellulose (Japan) (Made by paper: F10MC)
Was added and mixed at an inclination angle of 30 ° and a rotation speed of 20 r / m for 3 minutes to obtain a slipperiness improving agent-containing detergent composition. Table 1 shows the slipperiness of the obtained slipperiness improving agent-containing detergent composition. It was a slipperiness improving agent-containing detergent composition having a slippage rank of 3.

After drying, the skin feel is about 5 minutes after hand washing and washing, and the washing solution adhering to the hand is washed for 15 seconds with tap water, and the front and back of the hand on the towel (100% cotton) are left for 10 seconds. The feel of the hand after allowing the towel to absorb moisture on the front and back of the hand was evaluated based on the following evaluation criteria.
〔Evaluation criteria〕
○: Same as when using detergents that do not contain viscous minerals or polysaccharides

  The slipperiness improving agent for hand washing of the present invention is preferably used in hand washing of clothes and the like.

Claims (4)

  A smoothness improving agent for hand-washing laundry, comprising at least one selected from the group consisting of (a) clay minerals and (b) polysaccharides, for improving the smoothness during hand-washing.   2. The smoothness improving agent for hand-washing laundry according to claim 1, wherein the clay mineral is a swellable smectite clay mineral.   (a) The clay for hand-washing laundry according to claim 1 or 2, wherein the clay mineral is one or more selected from the group consisting of montmorillonite, beidellite, hectorite, saponite, nontronite and swellable fluorine-based mica. Sex improver.   The smoothness improving agent for hand-washing laundry according to claim 1, wherein the polysaccharide (b) contains one or more selected from the group consisting of hydroxyethyl cellulose, carboxymethyl cellulose and guar gum.