JPH0449600B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a detergent composition used for washing clothes, and more specifically to a new form of detergent composition that has outstanding solubility despite having a higher bulk density than conventional granular detergents. The present invention relates to a detergent composition. Heavy duty detergents are currently available on the market in granular or liquid form. Comparing these two, current granular detergents generally have an average particle size of 200~
Since they are hollow particles of about 800 μm (their bulk density is around 0.3 g/cc), they are usually bulky relative to their weight. Therefore, current granular detergents are not only inconvenient to carry, but also require a considerable amount of space for storage and display. In addition, when using granular detergent at home, even if the proper amount to be used and the means for measuring it are clearly indicated on the carton, it is troublesome for consumers to put it into practice. On the other hand, liquid detergents have the advantage of having a high concentration of active ingredients, so they are not as bulky as granular detergents, and because they are liquid, they are easy to handle, and the amount used per wash can be easily measured. We are prepared. However, liquid detergents have a problem in that their cleaning power is slightly inferior to that of granular detergents due to the difficulty in blending alkaline builders, and the cost of the bottles containing the detergents is higher than cartons of granular detergents. I can't escape the disadvantage. In view of the current state of heavy-duty detergents as described above, the present invention proposes a high bulk density detergent composition that can be used as a detergent in a form different from conventional detergents.According to the present invention, the bulk density of the detergent is increased. For example, the high bulk density detergent composition of the present invention can be made into a tablet, so the amount to be used per wash can be measured in tablets. do not have. Furthermore, according to the present invention, active ingredients and other ingredients can be contained in a single particle at a high concentration, so that the detergent composition of the present invention is not as bulky as current granular detergents. Unlike liquid detergents, it does not interfere with the formulation of alkaline builders. Incidentally, although some high bulk density type detergents are commercially available in Europe and America, they have not yet been developed in Japan. This is thought to be due to differences in washing habits. In Western countries, it is customary for ordinary households to use hot water for washing, but in Japan, with some exceptions, the cold water supplied from the tap is used for washing, so high bulk density detergents are difficult to dissolve. This is because there is a concern that it will take a long time. Therefore, in order to develop high bulk density detergents that suit Japan's laundry habits, the most important issue is to give high bulk density detergents the ability to easily dissolve in cold water in a short period of time. I can say it. As a result of extensive research to solve this problem, the present inventors have found that if metal hydrogen sulfite and/or metal hydrogen phosphite and an alkaline compound are blended into a detergent composition, the composition can be compressed and granulated. Even though it has a high bulk density, it was confirmed that it dissolves in cold water in a short time. In the present invention, metal hydrogen sulfite and/or metal hydrogen phosphite (component A) and one or more alkaline compounds selected from alkali metal salts of carbonic acid, silicic acid, phosphoric acid, and boric acid ( What is component B)?
It functions as a disintegrant in water for the granulated high bulk density detergent, but the amount of the hydrogen sulfite metal salt and/or hydrogen phosphite metal salt, which is component A, is about 2% in the detergent composition.
~50wt%, preferably 3~40wt% is allowed, and the amount of the above alkaline compound as component B is such that the weight ratio of component A/component B is maintained in the range of 1/10 to 5/1. shall be. Therefore, depending on the bulk density of the detergent to be obtained as a product and the types of ingredients A and B actually used, the amounts of ingredients A and B can be arbitrarily selected within the above range. can. The alkaline compound as component B of the present invention is carbonic acid,
One or more alkaline compounds selected from alkali metal salts of silicic acid, phosphoric acid, and boric acid, specifically sodium carbonate, sodium bicarbonate, sodium percarbonate, sodium silicate, sodium orthophosphate, and pyrophosphoric acid. These include sodium, sodium tripolyphosphate, sodium borate, and sodium perborate. Among these, peroxides such as sodium percarbonate and sodium perborate have a large contribution to disintegration in water, so B
Particularly preferred as a component. The high bulk density detergent composition of the present invention can be easily produced by blending the above-mentioned water-disintegrating agent into a conventional granular detergent and compressing and granulating it by an appropriate means. The shape after granulation is also spherical, cylindrical,
You can choose any format such as a tablet. The size of the granules may be arbitrary, and for example, one granule may cover the amount of detergent required for one wash. Regarding the bulk density of the granules, the value does not need to be within a specified range in the present invention. However, the bulk density of currently commercially available granular detergents is approximately 0.3 g/cc;
Considering that increasing the bulk density too much may deteriorate the solubility in cold water even if a disintegrant in water is added, the bulk density of the detergent composition of the present invention is generally 0.5 g/ cc or more, preferably in the range of 0.8 to 1.2 g/cc. EXAMPLES Next, the structure and effects of the high bulk density detergent composition according to the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto. Example 50wt% linear alkylbenzene sulfonate,
After homogeneously mixing both components A and B (both powders) as shown in the following table into a powder detergent with a composition of 20 wt% zeolite and 30 wt% mirabilite, mix it in a container with an inner diameter of 3 cmφ and a height of 1 cm. Place the lid on the 80
A load of Kg (pressure of 11 Kg/cm ² ) was applied to form a tablet.

【table】

[Table] Next, the solubility and detergency of each sample in Table 1 was tested. First, Hitachi, Ltd.'s washing machine (PS
-5330, blue sky) was filled with 30 g of water, 40 g of a tablet-shaped sample was added thereto, and after stirring for 5 minutes, the entire amount was transferred to a 100 mesh screen and suctioned, and the residue was dried and weighed. The solubility of the samples was evaluated in terms of weight percent of residue to input amount. Solubility was evaluated at two points: water temperature of 10°C and 25°C. The results are shown in Table 2. In addition, regarding the cleaning power of each sample, using the same washing machine as above, artificially soiled cloth (cotton knitted fabric) was washed with water.
30, bath ratio 30 times, tablet-shaped sample usage fee 20
g. Wash for 10 minutes at a water temperature of 10°C or 25°C, then rinse the items twice for 3 minutes each, dehydrate and dry them. Visually evaluate the degree of dirt removal using a 10-point scale. The cleaning power of the samples was evaluated. The results are shown in Table 2.

【table】

[Table] *Comparative example Sample No. 9 in Table 2 is a commercially available granular detergent that has not been made into a tablet (bulk density = 0.3 g/cc), and its composition is 20 wt% linear alkylbenzene sulfonate, 10 wt% Ash. %, Sil10wt%, Zeolite
15wt%, mirabilite balance.

Claims (1)

[Scope of Claims] 1 (A) Metal hydrogen sulfite and/or metal hydrogen phosphite (B) One or two alkaline compounds selected from alkali metal salts of carbon, silicic acid, phosphoric acid, and boric acid.
A high bulk density detergent composition, characterized in that it contains (C) A/B=1/10 to 5/1.