JPS6096692A - 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 improved powder physical properties.

In recent years, phosphates in detergents have been regulated for environmental reasons, and aluminosilicates (zeolites) and the like have come to be used as builders 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 have been conducted to improve the powder physical properties of granular detergents. There is.

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 The inventors have discovered that the properties of the anionic surfactant, particularly its crystallinity, can be changed by adding an inner olefin sulfonate in a specific ratio to the surfactant, leading to the completion of the present invention.

That is, the granular detergent composition of the present invention comprises (a) a highly crystalline anionic surfactant and (b) an inner olefin sulfonate at a weight ratio of (b)/(,) of 0.
It is characterized by containing in a ratio of 01-171.

The highly crystalline anionic surfactant that is the component (,) is
These surfactants include α-olefin sulfonates and alkyl sulfates, and while these surfactants are hard due to their good crystallinity, they are brittle and susceptible to impact.

On the other hand, granular detergents mainly composed of inner olefin sulfonates have poor caking properties and require agents to prevent them from caking, as shown in JP-A-52-41612.
Inner olefin sulfonates were commonly used in liquid detergents. The present invention improves the properties of an anionic surfactant with good crystallinity by adding such an inner olefin sulfonate.

(a) As a specific example of the surfactant for g, the number of carbon atoms is 1
2-22 α-olefin sulfonate, carbon number 10~
20 alkyl sulfates (preferably straight chain alkyl groups), etc., which may be used alone or in combination with 2'c6i or more. Examples of the salt include alkali gold M salts, alkanolamine salts, and ammonium salts, with sodium salts being preferred.

(b) The inner olefin sulfonate for IliC is a salt of a sulfonated inner olefin, and preferably has a carbon number of 1θ to 20. Examples of the salt include alkali metal salts, alkanolamine salts, and ammonium salts, with sodium salt being preferred.

The cleaning composition of the present invention includes the above components (,) and (b).
) component is (b) / (a) - θ, 01/I ~ 1 /
in a weight ratio of 1, preferably (b)/(a) =
It is contained at a ratio of 0.05/1 to 0.5/1. If this ratio is 0.01/1, a sufficient effect of improving the powder physical properties cannot be obtained, whereas if it exceeds 1/1, the granular detergent will easily cake due to the tendency of the inner olefin sulfonate to solidify. , undesirable.

The granular detergent of the present invention can be prepared, for example, by preparing an aqueous slurry containing components (a) and (b) and, if necessary, other components such as a builder, and then spray-drying the slurry, or by mixing both components. It is preferable to form a granular detergent into a powder in which a highly crystalline anionic surfactant and an inner olefin sulfonate coexist.

In the granular detergent composition of the present invention, anionic surfactants such as alkylbenzene sulfonates, α-sulfofatty acid salts of fatty acid lower esters, polyoxyalkylene alkyl ether sulfates, fatty acid salts, Nonionic surfactants such as oxyethylene alkyl ethers and JJW Fj e alkylolamides, amphoteric surfactants such as alkyl betaines, organic builders such as citrates and nitrilotriacetates, silicates, carbonates, zeolites, sulfates, etc. inorganic builders, anti-recontamination agents, enzymes, and salt control agents.

Various additives such as optical brighteners, bleaching agents, pigments, and fragrances can be blended.

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

Example α-Olefin sulfone relative sodium sodium Inner A detergent slurry containing sodium olefin sulfonate, sodium alkylbenzene sulfone, sodium silicate, etc. was spray-dried, and sodium carbonate and a portion of zeolite were mixed into powder to form the powders shown in Table 1. Granular detergent composition of the composition shown (
Samples A2-4) were prepared. Similarly, as a comparative example, one without adding inner olefin sodium sulfonate (
Sample A1) was prepared and used as a comparative example.

The particle strength and crushing value (assimilability) of these compositions were measured according to the following 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/sec, and changes in bulk density before and after transport were measured.

Place the sample in a cell with a crushing value of 5 cm 525 and a height of 5.5 mm, apply a load of 3 Ky for 3 minutes to create a test piece, and destroy this test piece (2) K required load (K
y) was measured.

Table 1 *〕Comparative example Wood type A type zeolite with average particle size lμ

Claims (1)

[Claims] 1. (a) highly crystalline anionic surfactant and (b) inner olefin sulfonate in weight ratio (b)
/ A granular detergent composition characterized by containing (a) in a ratio of 0.01 to 1/1.