JPS6096693A - Granular detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a granular detergent composition with powder physical properties.

In recent years, phosphates in detergents have been regulated for environmental reasons, and aluminosilicates (zeolites) have come to be used as building blocks to replace phosphates. Along with this, deterioration of powder physical properties such as particle strength and caking (solidification) due to long-term storage has become a problem for granular detergents, and various studies are being conducted to improve the powder physical properties of granular detergents. .

The inventors of the present invention have focused on improving powder physical properties by modifying the properties of anionic surfactants, which are the main components of granular detergents, and as a result, we have found that highly crystalline anionic surfactants By adding inner olefin sulfonate and nonionic surfactant to the agent in a specific ratio.

The inventors discovered that the anionic surfactant's properties, particularly its crystallinity, change, leading to the completion of the present invention.

That is, the granular detergent composition of the present invention has the following (,) to
(a) #: minutes by weight ratio (b + c) / a
=0.01/1 to 1/1.

(,) Highly crystalline anionic surfactant, (b) Inner olefin sulfonate, (,) Nonionic surfactant.

(a) Highly crystalline anionic surfactants that are JE components include α-olefin sulfonates, alkyl sulfates, etc. These surfactants are hard due to their good crystallinity, but are brittle and resistant to impact. It had the property of being weak against the enemy. On the other hand, inner olefin sulfonates have poor caking properties1 and are usually used mainly in liquid detergents. JP-A No. 52-41612 also proposes to improve the caking property of the inner olefin sulfonate by adding alcohol ethoxylate with a relatively small number of moles of ethylene oxide, which is a nonionic activator. However, no study has been made on the powder characteristics of highly crystalline anionic surfactants. The present invention improves the properties of an anionic surfactant with good crystallinity by adding such an inner olefin sulfonate together with a nonionic surfactant.

(,) As a specific example of the surfactant component, carbon number 12
~22 α-olefin sulfonate, carbon number 10-2
0 alkyl sulfates (preferably straight-chain alkyl groups, etc.), which may be used alone or in combination of two or more.Also, as salts, alkali metal salts, alkanolamine salts, anthonium salts, etc. For example, sodium salt is preferred.

The inner olefin sulfonate of component (b) is a salt of a sulfonated inner olefin, and has a carbon number lθ
~20 is preferred. Examples of salts include alkali metal salts, alkanolamine salts, ammonium salts, etc.
Preferred is sodium salt.

<a) Specific examples of the nonionic surfactant for g include ethylene oxide adducts of aliphatic alcohols having a carbon number lθ to 20 or alkylphenols whose alkyl groups have 6 to 12 carbon atoms, or ethylene oxide and propylene oxide adducts. Coadducts having an average number of added moles of 4 to 15 moles are mentioned.

The total amount of component (b) and component (c) is 1-100% of (a) g, that is, (b + e ) /
It is added in the range of a=0.01/~1/1.

Moreover, preferably (b + c) / a = 0.
05 to 0.3/l. (b + (+) /
If a is smaller than 0.01/1, the effect of improving the powder physical properties cannot be sufficiently obtained, and if it exceeds 1/1, the inner olefin sulfonate and nonionic surfactant act as a binder for the granular detergent, and as a result, the granular detergent The detergent tends to cause caking, which is undesirable.

(b) The ratio c/b of g component and (c) component is 1799
~60/40te, preferably c/b=10/90~5
It is 0150.

(c) Addition of fraction is preferable also from the viewpoint of cleaning performance.

The granular detergent of the present invention can be prepared by, for example, preparing an aqueous slurry containing components (aL (b) and (0) and, if necessary, other components such as a builder) and then spray-drying the slurry.
Alternatively, it is preferable to mix each fraction to form a granular detergent, and to coexist a highly crystalline anionic surfactant, an inner olefin sulfonate, and a nonionic surfactant in the powder.

In the granular detergent composition of the invention, anionic surfactants such as alkyl benzene sulfonates, α-sulfofatty acid salts of fatty esters, polyoxyalkylene alkyl ether sulfates, fatty acid salts, etc. are optionally used. Amphoteric surfactants such as betaine, citrate and 2) IJe
r) Organic builders such as diacetates, silicates, carbonates, zeolites, sulfates, anti-recontamination agents,
Enzymes, foam control agents, optical brighteners, bleaches, pigments,
Various additives such as fragrances can be blended.

The granular detergent composition of the present invention is suitable as a granular detergent for clothing because it has excellent particle strength and does not turn into powder during transportation and does not cause caking during long-term storage.

Detergent slurry containing α-olefin sulfone relative sodium sodium olefin sulfonate, alcohol ethoxylate, sodium alkylbenzene sulfonate, sodium silicate, etc. is spray-dried, charcoal is powder-mixed with sodium and part of zeolite. First. ff
Granular detergent compositions (Samples 42-4) having the compositions shown in were prepared. Similarly, as a comparative example, a sample (sample 1) without addition of inner sodium ole7insulfonate and alcohol ethoxylate was prepared and used as a comparative example.

For these compositions, single particle strength and crushing value (assimilability) were measured according to the following evaluation method and are shown in Table 1.

A sample granular detergent was transported by an air lift adjusted to a particle strength wind speed of 15 m/aec, and changes in density before and after transport were measured.

Crushing value: 5 cm, put the sample into a cell with a height of 5.5 cm, and heat it at 3K.
A test piece was prepared by applying a load of y for 73 minutes, and the load M (Ky) required to destroy this test piece was measured.

Table 1 *) Comparative Example Ethylene oxide adduct of secondary alcohol with carbon number lO~14 (average number of added moles of ethylene oxide -5) Hayashi Type A zeolite with average particle size IA

Claims (1)

[Claims] 1. (a) a highly crystalline anionic surfactant, (b) an inner olefin sulfonate, and (c) a nonionic surfactant in a weight ratio of (b+c)/a=0.01/1 to
A granular detergent composition characterized by containing the following: