JPH0439520B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a dense granular concentrated detergent. More specifically, the present invention relates to a high-density granular concentrated detergent with improved detergent powder color. [Prior Art] In recent years, there has been an increasing demand for high-density powder detergents from the viewpoint of resource conservation, transportation of detergents, and convenience for housewives in carrying and storing detergents. High-density powder detergent is disclosed in Japanese Patent Application Laid-Open No. 48-61511,
These are disclosed in JP-A-53-36508, JP-A-58-132093, etc., but all of them relate to the general composition, manufacturing method, or solubility improvement of high-density powder detergents. There were no issues related to the fabric color of detergents. [Problem to be solved by the invention] High-density granular concentrated detergent (high-density here means
Conventional low-density detergents (with a bulk specific gravity of 0.5 g/cm ³ , preferably 0.6 g/cm ³ or more) are
The content of active ingredients such as surfactants is increased and the amount of inorganic salts is reduced to the necessary minimum compared to powders ( ^{approximately} 0.3g/cm3), but the color of the powder becomes worse due to the reduction of inorganic salts There is a tendency to If the color of the powder deteriorates, it may not only reduce the product value but also give a negative impression of the ``whiteness after washing'' of white clothing. Therefore, it is necessary to make the powder of high-density granular concentrated detergent white in color. [Means for Solving the Problems] As a result of intensive studies, the inventors of the present invention have developed a high-density concentrated detergent by using two specific activators in combination and a specific optical brightener. The present invention was completed by discovering that the color of powder can be improved. That is, the present invention provides a high-density granular concentrated detergent with a bulk density of 0.5 g/cm ³ or more, in which (a) an alkylbenzene sulfonate and (b) an olefin sulfonate are combined in a ratio (a)/(b) of The ratio is 1/3 to 8/1 and the total amount is 25 to 50% by weight, and (c) a group consisting of fluorescent brighteners represented by the following formulas () to () (hereinafter referred to as group (A)). The ratio of (a)/() is a weight ratio of one or more types selected from
Provided is a high-density granular concentrated detergent composition characterized in that the ratio is 10/1 to 1/10 and the total amount is 0.01 to 1% by weight. [However, R ₁ is

[Formula] or

[Formula] R ₂ is −NHCH ₂ CH ₂ OH,

[Formula] -N(CH ₂ CH ₂ OH) ₂ , -NH ₂ ,

〔Effect of the invention〕

The high-density granular concentrated detergent obtained by crushing and granulating is
In particular, the color of the powder tends to deteriorate, but by applying the present invention, it is possible to obtain a detergent that is as white as conventional detergent powder. [Examples] Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to the following Examples. High-density granular detergent dough A and particles B having the composition shown in Table 1 were produced, and B was dry mixed with A to obtain a high-density granular detergent powder. Using Nippon Denshoku Color Difference Meter 1001DP model, detergent powder b
The values were measured and compared. The one with a positively larger b value is judged as yellow,
If there is a color difference with a b value of 1.0 or more, whiteness can be determined with the naked eye.

【table】

[Table] Note)
*1 LAS: Linear alkylbenzene sulfonic acid sodium (C ₁₂ - C ₁₃ )
*2 AOS: α-olefin sulfonic acid soda (C _1
6 ~ C ₁₈ )
*3 Nonion: Polyoxyethylene alkyl ether (C ₁₂ - C ₁₃ , EO￣=10) The nonion used for particles (B) is also the same.


*4 ():
Compositions are shown in weight %.

The method for manufacturing the high-density granular concentrated detergent used in this example will be described below, but this is only a preferred example and is not particularly limited. Detergent manufacturing method Slurries each having a water content of 50% by weight were prepared according to the composition (P) in Table 1, and were spray-dried to obtain detergent powder (P) having a bulk density of approximately 0.3 g/cm ³ . Next, (P) was put into a high-speed mixer (stirring rolling granulator, manufactured by Fukae Kogyo Co., Ltd.), a composition (Q) of finely powdered zeolite moistened with water was added, and the mixture was crushed and granulated. A high-density granular detergent having a bulk density of 0.6 g/cm ³ to 0.8 g/cm ³ was obtained. At this time, the water in the composition (Q) is
The fine zeolite powder in the composition (Q) acts as a granulation binder for the crushed detergent powder (P),
It acts as a carrier for water as a granulation binder and as a granulation aid to suppress the formation of coarse particles. Further, as the granulation binder, the nonion in the composition (P) may be liquefied and sprayed onto the detergent powder during granulation. Finally, fine powder zeolite (R) was dry mixed into the high-density granular detergent (P) + (Q) obtained in this way to improve fluidity.
High-density granular detergent fabrics (A) with excellent anti-caking properties were obtained, and then particles (B) were dry mixed to obtain high-density granular detergents of each composition. Particles (B) are prepared by mixing water-soluble and crystalline anhydrous sodium carbonate in a V blender (P-K twin
shell laboratory blender，8QT.Liguid−solid
model, PATTERSON KELLEY CO., USA)
Next, add nonion from the liquid addition device of the V blender, mix for 3 minutes, and then add 60% of polyethylene glycol (average molecular weight approximately 13,000) prepared in advance.
By adding a wt % aqueous solution and mixing for 5 minutes, and finally adding finely powdered zeolite and mixing for 30 seconds, a product with excellent fluidity and anti-caking properties was obtained, which was used in this example. Additionally, small amounts of thermally unstable additives, such as enzymes and bleaching agents, are preferably incorporated by dry mixing in this last step. In this example, after crushing and granulation, the material was passed through a screen with an opening of 1 mm to remove coarse particles with a particle size of 1 mm or more. According to this manufacturing method, the crushing and granulation conditions (type of granulator, granulation temperature, granulation time, type of granulation binder, etc.), the opening of the screen to be passed through after granulation, the recycling of coarse particles, etc. A granular detergent having a desired bulk density and particle size can be obtained by selecting the amount, bulk density and particle size of the water-soluble and crystalline salt particles (B) to be dry mixed.

Claims (1)

[Claims] 1. A high-density granular concentrated detergent having a bulk density of 0.5 g/cm ³ or more, comprising (a) an alkylbenzene sulfonate and (b) an olefin sulfonate in a ratio of (a)/(b). The group consisting of fluorescent brighteners (hereinafter referred to as (a) The ratio of (a)/() is a weight ratio of one or more types selected from group (named group) and an optical brightener represented by formula ().
A high-density granular concentrated detergent composition characterized in that the ratio is 10/1 to 1/10 and the total amount is 0.01 to 1% by weight. [However, R ₁ is [Formula] or [Formula] R ₂ is -NHCH ₂ CH ₂ OH, [Formula] -N(CH ₂ CH ₂ OH) ₂ , -NH ₂ , [Formula] or -OCH ₃ , - _NHCH3 . ]