JPH0461919B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to high bulk density detergent compositions with good solubility. Heavy duty detergents are currently offered on the market in granular or liquid form. Liquid detergent is
Although it has the advantage that it is not very bulky because the active ingredients can be highly concentrated and is easy to handle because it is a liquid, it has less cleaning power than granular detergents because it is difficult to blend the alkaline builder. There is a problem that it is inferior. Bottles containing liquid detergent also cost more than cartons of granular detergent. On the other hand, granular detergents do not interfere with the blending of alkaline builders, and have become mainstream as heavy-duty detergents for clothing. However, in order to improve solubility, current granular detergents have an average particle size of 200 to 200
It is made of bead-shaped hollow particles of about 800 μm, and as a result, the bulk density is as low as about 0.3 g/cc, resulting in a problem that it is bulky relative to its weight. Therefore, current granular detergents not only have high transportation costs, but also require a considerable amount of space for storage and display. In addition, when using granular detergents at home, even if the amount of detergent to be used and the method for measuring it are specified, it is troublesome for consumers to carry out the instructions. Therefore, efforts are being made to develop high bulk density detergents that overcome these drawbacks of current granular detergents. Increasing the bulk density of detergents allows them to contain higher concentrations of active ingredients, making them less bulky than current granular detergents. Also, if we could go one step further and make it into tablets,
It is extremely easy to handle, as the amount used per wash can be calculated by the number of tablets. The biggest challenge in increasing the bulk density of detergents is how to solve the problem of detergent solubility. Since it is common to use the cold water supplied from the tap as it is, it is necessary to have an easily soluble material that can be dissolved in cold water in a short period of time. As a result of intensive studies from the above viewpoint, the present inventors found that if anhydrous hydrosulfite and peroxide are blended into a detergent composition, even if the detergent composition is made to have a high density by compression shaping, etc. It was discovered that the composition dissolves even in cold water in a short period of time, and based on this finding, the present invention was completed. That is, the high bulk density detergent composition of the present invention comprises (a)
It is characterized by containing one or more selected from anhydrous hydrosulfite and (b) percarbonate and perborate, and having a/b=1/10 to 5/1. Anhydrous hydrosulfite (component A) and peroxide (component B) act as disintegrants in water for high bulk density detergents formed by granulation or tablet formation. Anhydrous hydrosulfite is incorporated in the detergent composition in an amount of 1 to 50 wt%, preferably 10 to 40 wt%. The peroxide of component B is
It is appropriate that the weight ratio of component A/component B is in the range of 1/10 to 5/1. It is appropriately determined depending on the bulk density of the detergent composition and the types of both components A and B used. Specific examples of the peroxide of component B include sodium percarbonate, potassium percarbonate, sodium perborate, and potassium perborate. These B components also work as an alkali builder. Detergent components used in ordinary granular detergents can be blended into the detergent composition of the present invention.
These ingredients include alkylbenzene sulfonates, alkyl sulfonates, α-olefin sulfonates, alkyl sulfates, alkyl polyether sulfates, anionic surfactants such as fatty acid soaps, alkyl ethoxylates, alkyl phenyl ethoxy esters, nonionic surfactants such as alkyl alkanolamides, amphoteric surfactants such as alkyl betaines, inorganic builders such as sodium silicate, sodium carbonate, sodium bicarbonate, sodium tripolyphosphate, zeolites, sodium sulfate, sodium citrate, and ethylenediamine. Examples include organic builders such as sodium tetraacetate and sodium nitrilotriacetate. Further, optical brighteners, enzymes, and other additives may also be included. The detergent composition of the present invention can be easily molded by suitable means by, for example, blending both the above-mentioned components A and B with the detergent component. The shape of the detergent composition after molding can be arbitrarily selected, such as spherical, cylindrical, or tablet-like, and its size can also be arbitrarily selected. You can also make it as large as you can handle. Although the bulk density of the detergent composition of the present invention is not particularly limited, it is usually 0.5 g/cc or more, preferably 0.8 to 1.2 g/cc. Further, since anhydrous hydrosulfite is easily decomposed by moisture, it is preferable that the detergent composition contains as little moisture as possible. According to the detergent composition of the present invention, by blending anhydrous hydrosulfite and peroxide as disintegrants in water, the detergent composition has excellent solubility even though it has a high bulk density without forming hollow beads like conventional granular detergents. It shows that high bulk density is possible. The detergent compositions of the present invention are particularly useful as heavy duty laundry detergents. Example 50wt% linear alkylbenzene sulfonate,
After uniformly mixing both components A and B (both powders) shown in Table 1 below in a powdered detergent with a composition of 20 wt% zeolite and 30 wt% mirabilite, the mixture was prepared with an inner diameter of 3 cm and a height of 3 cm. The mixture was placed in a 1 cm container, covered, and made into a tablet by applying a load of 80 kg (pressure of 11 kg/cm ² ). This sample was evaluated for solubility and detergency according to the following procedure, and the results are shown in Table 1. Evaluation of solubility Washing machine manufactured by Hitachi, Ltd. (PS-5300, blue sky)
Pour 30 g of water into the tank, add 40 g of the tablet-shaped sample, stir for 5 minutes, transfer the entire amount onto a 100 mesh screen, suction it off, weigh the residue after drying, and calculate the weight percent of the residue relative to the input amount. The solubility was evaluated by obtaining the dissolved residue. This rating is 10℃, 25
This was done for ℃. Evaluation of cleaning power Using the washing machine mentioned above, wash artificially soiled cloth (cotton knitted fabric) at a water volume of 30%, a bath ratio of 30x, a sample amount of 20g,
Washing for 10 minutes at a water temperature of 10°C or 25°C, then rinsing the item twice for 3 minutes each, then dehydrating it and drying it, and visually judging the degree of dirt removal using a 10-point scale.
The cleaning power of each sample was evaluated. 【table】

Claims (1)

[Claims] 1 Contains one or more selected from (a) anhydrous hydrosulfite and (b) percarbonate and perborate, and is characterized by having a/b = 1/10 to 5/1. A high bulk density detergent composition.