JPH02311600A - Detergent composition in tablet form - Google Patents

Abstract

PURPOSE:To obtain the subject composition which has an improved releasability from a metal mold and readily disintegrates in water by using as the constituents a granular anionic surface active agent and a CMC powder hardly soluble in water and having a specified particle size. CONSTITUTION:5 to 50wt.% granular anionic surface active agent (A) (e.g. potassium 14 to 18C alpha-olefinsulfonate) is mixed with 1 to 30wt.% CMC powder hardly soluble in water and having such a particle size that the fraction passing through a 200-mesh sieve accounts for at least 80%, and if necessary, a builder, a viscosity modifier, an enzyme, a softening agent, further with a bleaching agent, a fluorescent agent, a perfume, a coloring matter, etc. A tablet having a diameter of 20 to 60mm, a thickness of 5 to 20mm, and a weight of 5 to 60g is formed from this mixture by a tablet molding process.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tablet detergent composition that easily disintegrates in water and has excellent releasability from molds during production.

Conventional laundry detergents have a bulk density of 0.3 g / c.
It was produced as bead-shaped hollow particles of about

However, such detergents have a low specific gravity and a low concentration of active agent, which increases transportation costs and requires a considerable amount of space for storage and display. Furthermore, in ordinary households,
There were inconveniences such as having trouble finding a place to store it and making it difficult to weigh it. Therefore, recently, high bulk density granular detergents that can be used for cleaning with a small amount of detergent have been promoted.

In order to further improve convenience, attempts have recently been made to develop tablet detergents. However, while tablet detergents are simple and easy to use, they have the disadvantage that they do not easily disintegrate in water.

Such easy disintegration in water is also required for tablets used in other fields such as pharmaceuticals and foods.

Therefore, in general, such tablets are made by mixing the main ingredients with succinic acid and sodium carbonate or sodium bicarbonate in a dry state and forming a tablet, so that when it comes into contact with water, the acid and carbonate are mixed together. A method has been adopted in which the disintegrability is improved and the dissolution of the main component is promoted by reacting with carbon dioxide to generate carbon dioxide.

However, in tablet detergents, when an anionic surfactant, which is recognized to have excellent detergency, is added as the main active ingredient to the above-mentioned foaming ingredients, the amount of 112
Mold adhesion occurs during manufacturing, significantly deteriorating manufacturability, and
There was a problem that the disintegration properties of the tablets were insufficient. Furthermore, while the tablet detergent is being stored, it absorbs the moisture contained in it and the moisture in the air, and an acid-alkaline reaction gradually occurs, generating carbon dioxide, so the tablet detergent is poured into water after storage. Then, there was a problem that the disintegration property deteriorated significantly.

The present invention overcomes the drawbacks of conventional tablet detergents, and provides a tablet detergent that has excellent releasability from molds during production and also easily disintegrates in water. It is something to do.

The tablet detergent composition of the present invention is characterized by containing the following components (A) and (B).

(A) Powdered anionic surfactant = 5-50% by weight
.

(B) 80% fraction passed through 200 mesh sieve
Slightly water-soluble carboxymethyl cellulose powder having a particle size of 1 to 30% by weight.

The present invention will be explained in more detail below.

Examples of the anionic surfactant as component (A) include the following.

1) Straight-chain alkylbenzene sulfonate having an alkyl group having an average carbon number of 8 to 16; 2) α-olefin sulfonate having an average carbon number of 10 to 20.

3) Sulfonate of a fatty acid lower alkyl ester having 8 to 22 carbon atoms as a fatty acid residue; 4) Alkyl sulfate having an average of 10 to 20 carbon atoms; 5) Straight chain or branched alkyl having an average of 10 to 20 carbon atoms. or alkenyl group, and an alkyl ether sulfate or alkenyl ether sulfate to which an average of 0.5 to 8 moles of ethylene oxide is added; 6) a saturated or unsaturated fatty acid salt having an average carbon number of lθ to 22;

As counter ions in these anionic surfactants, alkali metal salts such as sodium and potassium are usually suitable.

These anionic surfactants may be used alone or in combination of two or more.

(A) The anionic surfactant is blended in the tablet detergent composition in an amount of 5 to 50% by weight, preferably 10 to 40% by weight. If the blending amount is less than 5% by weight, the shape of the tablet must be made larger or the number of tablets used must be increased in order to satisfy the cleaning power, which poses a practical problem. On the other hand, if it exceeds 50% by weight, the amount of other components such as builders will be reduced, which is not preferable.

In addition, it is appropriate that the water content of (A) the anionic surfactant or the intermediate raw material for tableting is 10% by weight or less;
~10% by weight is preferred. If the water content is less than 1% by weight, a large amount of energy is required for production and it is not practical from an economical point of view.

On the other hand, if the water content exceeds 10% by weight, the tablets will adhere to the mold during production, making release from the mold difficult.

Examples of the poorly water-soluble carboxymethylcellulose of component (B) include free (acid type) carboxymethylcellulose, carboxymethylcellulose calcium, carboxymethylcellulose magnesium, carboxymethylcellulose aluminum, and the like, and these may be used alone or in combination of two or more. Even when a water-soluble salt such as sodium carboxymethylcellulose is used, neither the mold release property nor the water disintegration property is improved.

In carboxymethylcellulose, carboxymethyl groups are distributed in the primary or secondary alcoholic hydroxyl groups of glucose in cellulose, and theoretically the degree of substitution (
Etherification degree) up to 3.0 can be obtained. In the present invention, carboxymethyl cellulose having a degree of substitution of 0.2 to 0.8 is preferred. Moreover, the water content of carboxymethyl cellulose is preferably 10 weight or less.

(B) The carboxymethyl cellulose has a fraction passing through a 200 mesh sieve of 80% or more, preferably 10 to 10%.
A particle size of 50 μm is used. If particles having a particle size outside this range are used, the swelling of the carboxymethyl cellulose particles will be delayed and the particles will adhere to laundry, impairing the feeling of use, which is undesirable.

(B) Carboxymethylcellulose is blended in the tablet detergent composition in an amount of 1 to 30% by weight, preferably 10 to 25% by weight. On the other hand, if the blending amount is less than 1% by weight, the effects of the present invention will not be fully exhibited.

Even if it is blended in an amount exceeding 30 weight, it is meaningless as the effect does not improve in spite of the increase in the amount.

In addition to the above components (A) and (B), the detergent composition of the present invention further contains inorganic builders such as sodium tripolyphosphate and sodium birophosphate; aluminosilicate (zeolite), sodium citrate, and ethylenediaminetetra Calcium ion scavenging builders such as sodium acetate, nitrilotriacetate, sodium polyacrylate, sodium acrylate-sodium maleate anhydride copolymer, polyacetal carboxylate; carbonate;

Alkali builders such as silicates; sulfites, sulfates; anti-recontamination agents such as polyethylene glycol; viscosity modifiers such as nickladolene sulfonate, toluene sulfonate, xylene sulfonate, urea; protease, lipase, cellulase. , enzymes such as amylase (such as alkaline lipase which is particularly active in an alkaline atmosphere); softening agents such as quaternary ammonium salts and bentonite; bleaching agents, fluorescent agents, perfumes, pigments, etc. can be used.

The tablet detergent composition of the present invention can be easily molded into tablets according to a normal tablet molding method, and can be prepared by combining, for example, powdered (A) anionic surfactant and (B) carboxymethyl cellulose, or other optional ingredients. Mixed, diameter is about 20-60mm, thickness is about 5-20mm
It is molded into tablets each weighing approximately 5 to 60 g.

According to the present invention, (A) an anionic surfactant is blended with (B) poorly water-soluble carboxymethyl cellulose having a specific particle size range as a disintegrating agent, so that it quickly disintegrates when added to water. Moreover, a tablet detergent with excellent releasability from a mold during production can be obtained, and its commercial value can be significantly increased.

Hereinafter, the effects of the present invention will be explained in more detail with reference to Examples. Prior to this, the evaluation method used in the examples will be described.

(1) After uniformly mixing the releasable powder components from the mold, 20 g of this mixture is placed in a cylinder with an inner diameter of 40 mm, and the amount of 200 to 500 kg/
AJ was pressurized for 1 minute to form a tablet with a diameter of 40 mm and a weight of 20 g. The releasability from the mold was evaluated based on the following criteria.

A: No adhesion to the mold B: Slight adhesion C: Considerable adhesion (2) Disintegration test Two of the above detergent tablets (40 g in total) were heated at 25°C for 30 minutes.
The tablets were placed in a washing machine (spiral type 1 reversal type) filled with tap water, washed for 10 minutes, drained, and the disintegration properties of the tablets were evaluated according to the following criteria.

A: Collapsed and no lumps are observed B: Slight lumps are observed C: Large spots are observed A detergent slurry with a solids content of 45% was prepared using the following methods. This detergent slurry was dried using a countercurrent spray drying tower at a hot air temperature of 380°C to a moisture content of 5%.
A spray-dried product was obtained.

Next, various disintegrants and fragrances as component (B) were mixed with the dried product, and the mixture was compressed into tablets to obtain a tablet detergent composition.

The releasability and disintegration properties of each of these detergent compositions from the mold were evaluated, and the results are shown in Table 1.

(Margin below)

Claims (1)

[Claims] 1. (A) Powdered anionic surfactant: 5 to 50% by weight (B) Fraction passing through a 200 mesh sieve is 80%
A tablet detergent composition characterized by containing 1 to 30% by weight of poorly water-soluble carboxymethyl cellulose powder having a particle size of the above particle size.