JPH05171197A - Detergent for tableware washing machine - Google Patents

Abstract

PURPOSE:To obtain the subject detergent, excellent in detergency, degerming performance and emulsion stability without any residual bacteria and useful for homes, etc., by blending alkaline salts with a surfactant and a viscous polysaccharide. CONSTITUTION:The objective detergent is obtained by blending alkaline salts such as sodium carbonate with a surfactant such as a polyoxyethylene alkyl ether and a viscous polysaccharide such as sodium carboxymethyl cellulose.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher detergent used in a general household dishwasher.

[0002]

2. Description of the Related Art A dishwasher is a device originally developed for commercial use in restaurants and the like, and usually sprays hot water onto dishes to remove stains. The detergent used for this is mainly a peeling action due to strong alkalinity, which is mixed with a chelating agent or an organic acid that masks hardness components, and a chlorine agent such as sodium hypochlorite is further mixed until sterilization is performed. Is normal. In the dishwasher detergent that has evolved from commercial use to household use, in order to prevent danger, avoid the use of strong chemicals used for commercial use, make it weakly alkaline with a pH of 9 to 10, and reduce its detergency. It has been supplemented with an activator.

[0003]

However, a surfactant having a strong detergency has a strong foaming property, and the generation of bubbles hinders the jetting of hot water, so that there is a problem that the cleaning effect cannot be obtained. In addition, since foam outflow causes pollution problems, the surfactant to be blended must be a nonionic, fat-soluble and weak detergency agent. It was weak, and there was a problem that bacteria attached to the tableware remained.

An object of the present invention is to solve the above problems and to provide a household dishwasher detergent with high detergency.

[0005]

In order to solve the above problems, the present invention, in addition to alkaline salts and surfactants and the like which are blended in ordinary household dishwasher detergents,
It is a mixture of viscous polysaccharides.

[0006]

[Function] The viscous polysaccharide is added to promote the exfoliation of fine particles adhering to dishes. In addition, since the linear polymeric polycarboxylic acid of viscous polysaccharide interrupts between the surfactant micelles, the surfactant has increased emulsion stability and enhanced detergency. Furthermore, since the viscous polysaccharide has a strong metal ion masking action, it pulls out the polyvalent metal ions that crosslink the surface of the dish and the dirt substance to strengthen the dirt adhesion, and promotes washing.

[0007]

EXAMPLE One example of the present invention will be described based on the example of the dishwasher detergent formulation shown in Table 1.

[0008]

[Table 1]

In Table 1, alkaline salts, which are the main ingredients of this detergent as alkaline detergents, have a dissolution pH of 9.
The effect of stripping cleaning is low because it is kept as low as 5. Surfactants are used to supplement the cleaning but have an HLB value of 4.5.
Due to its high hydrophobicity, its detergency in water is weak.
The hydrophobic surfactant does not have a strong foaming power, but it still foams to the extent that it hinders the mechanical detergency of hot water jetting, so an antifoaming agent is added to suppress foaming. Organic acid sodium salt masks the hardness component in the wash water,
Prevents the deposition of scales in dishes and dishwashers, and also facilitates the removal of dirt that is bound to dishes through polyvalent metal ions. The enzyme agent decomposes starch-based stains such as cooked rice to make it easier to remove. The inorganic salt mainly has the effect of facilitating the mixing of each component into a powder form.

Next, the formulation of the viscous polysaccharide according to the present invention will be described.

The carboxymethyl cellulose sodium salt of carboxymethyl cellulose in Table 1 is a kind of viscous polysaccharide having the chemical structure shown in Chemical formula 1, and is usually a linear polymer having a length of about several millimeters. Is. It is also a polycarboxylic acid having a large number of carboxyl groups, and when it is made into a sodium salt, it dissociates in water, becomes hydrophilic, and dissolves.

[0012]

[Chemical 1]

The first combination effect of carboxymethyl cellulose sodium salt is a peeling cleaning effect. When one end of the molecule of carboxymethylcellulose adheres to the dirt substance, the force exerted on the dirt substance is increased by adding the amount added to the long carboxymethylcellulose molecule, and thus a strong peeling cleaning effect is obtained.

The second effect is to reinforce the emulsifying action of the surfactant. Since long carboxymethyl cellulose molecules enter between the surfactant micelles, the micelles cannot combine with each other, the emulsion stability is increased, and the detergency of the surfactant is improved.

The third effect is a masking effect of polyvalent metal ions involved in binding of hardness components and dirt substances. Already in the formulation example of Table 1, organic acid sodium salt is formulated for this purpose, but since the masking action of carboxymethyl cellulose having a large number of adjacent carboxyl groups is stronger than that of a low molecular weight organic acid, stains Improves the cleaning effect by extracting the polyvalent metal ions that bridge between the substance and tableware. Due to the above effects, the incorporation of carboxymethyl cellulose sodium salt enabled a high cleaning effect.

Further, since bacteria are also dirt substances having a diameter of about 1 μm, the incorporation of carboxymethyl cellulose sodium salt washes away the bacteria adhering to the dishes and prevented the residual of the bacteria after washing.

The same effect can be obtained with either potassium salt or ammonium salt of carboxymethyl cellulose, but it becomes insoluble with salts of polyvalent metals such as calcium salts and iron salts, and the above-mentioned polyvalent metal ions A high cleaning effect cannot be obtained because the masking effect cannot be obtained.

The above effects are not unique to carboxymethyl cellulose. Carboxymethyl cellulose is also a kind of viscous polysaccharide, but all of them are
An exceptionally small number of linear polymeric polycarboxylic acids have a sulfuric acid ester group, a sulfonic acid group or the like as an acidic dissociative group in place of the carboxyl group. All of these have the same cleaning effect as carboxymethyl cellulose. As the viscous polysaccharide, many linear polymeric polycarboxylic acids such as homopolymers of sugar acids such as glucuronic acid and galacturonic acid, and copolymers with other sugars are produced by animals, plants and microorganisms. .. Further, there are also viscous polysaccharides obtained by chemically synthetically introducing a carboxyl group into a polysaccharide having no carboxyl group such as cellulose and starch. Carboxymethyl cellulose is an example of this, and is a product obtained by introducing a carboxymethyl group into cellulose, which is a homopolymer of Glycoes.

As described above, the present embodiment utilizes the high cleaning effect of viscous polysaccharides to enhance the cleaning power of the dishwasher detergent and suppress the bacteria from remaining on the dishes.

Next, the results of comparing the cleaning effects of various viscous polysaccharides will be described with reference to Table 2.

[0021]

[Table 2]

After the porcelain curry dish was contaminated with curry rice, it was left to stand for a whole day and night under a humidified condition of a temperature of 30 ° C. to rot,
It was washed in a standard course of a commercially available dishwasher (NP-5600 manufactured by Matsushita Electric). As for the composition of the detergent and the amount of the detergent used, carboxymethyl cellulose was as shown in Table 1, and other viscous polysaccharides were used by mixing 10% instead of carboxymethyl cellulose of Table 1.

From Table 2, the effect of adding the alkali salt of water-soluble linear polymeric polycarboxylic acid or viscous polysaccharide was clear, and no bacterial residue was observed (detection lower limit value 1 cell / square centimeter). ..

[0024]

As described above, according to the present invention,
The combination of viscous polysaccharides produces a household dishwashing detergent with strong detergency and excellent sterilization performance.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI technical display part C11D 3:22) (72) Inventor Etsuzo Hamakawa 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. In the company

Claims (1)

[Claims] 1. A dishwasher detergent containing an alkaline salt, a surfactant and a viscous polysaccharide.