JPH05239496A - Granular nonionic detergent composition for clothes - Google Patents

Abstract

PURPOSE:To improve the detergency and rinsing by using a nonionic surfactant, a chelating agent, an alkalizing agent and a specified polyether polyol as the constituents. CONSTITUTION:5-30wt.% nonionic surfactant having an HLB of 9.0 to 16.0 is mixed with 3-50wt.% chelating agent, 30-80wt.% alkalizing agent, 0.1-5 wt.% polyether polyol having an average molecular weight of 2,000 to 8,000, obtained by the addition polymerization of a compound having 2 to 4 active hydrogen atoms with propylene oxide, and if necessary, 1-10wt.% higher fatty acid salt having a freezing point of 20 deg.C or higher to give the title composition of which particles having a diameter of 200-2000mum account for at least 95%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powdery granular nonionic detergent composition for clothes, and more particularly to a powdery granular nonionic detergent composition having improved detergency and improved rinsability.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
In many laundry detergents, a surfactant is also used in combination to improve the detergency against dirt. However, bubbles generated by the surfactant cause problems during rinsing and defective foam breakage.

Silicone-based defoamers have hitherto been used for improving the rinsability of laundry detergents containing a surfactant, but the silicone-based defoamers have a drawback that the defoaming effect is lowered during storage. In addition, there is a problem that the defoaming effect is lost in the detergent stock solution in the linen supply.

[0004]

As a result of intensive studies to solve the above problems, the present inventors have formulated nonionic surfactants, chelating agents, alkali agents and specific polyether polyols in specific amounts. By doing so, it was found that a powdery granular nonionic detergent composition for clothing with improved detergency and improved rinsability was obtained, and the present invention was completed.

That is, the present invention comprises (a) 5 to 30% by weight of a nonionic surfactant, (b) 3 to 50% by weight of a chelating agent,
(c) 30-80% by weight of alkaline agent and (d) 2-2 of active hydrogen.
A powdery and granular nonionic detergent composition for clothing, comprising 0.1 to 5% by weight of a polyether polyol having a molecular weight of 2000 to 8000 obtained by addition-polymerizing propylene oxide to a compound having 4 compounds. Is.

The nonionic surfactant as the component (a) used in the present invention is suitable when the HLB is in the range of 9.0 to 16.0, particularly 9.0 to 12.0 because it is excellent in stain removal and foam breakage. HLB used here is JTDavies and EKRideal, Interf
acial Phenomena, AcademicPress, New York 1963, p.3
71-383. Specific examples of the component (a) include polyoxyethylene alkyl ether and polyoxyethylene alkylphenyl ether. In particular, a straight-chain or branched-chain, primary or secondary alcohol having 10 to 15 carbon atoms, more preferably 12 to 14 carbon atoms, and ethylene oxide on average 3 to 12 moles, preferably 3 to 8 moles.
It is desirable to use the polyoxyethylene alkyl ether obtained by addition in step (1). The component (a) is incorporated in the entire composition in an amount of 5 to 30% by weight, preferably 10 to 20% by weight.

Examples of the chelating agent as the component (b) include orthophosphate, metaphosphate, pyrophosphate, hexametaphosphate, tripolyphosphate, synthetic aluminosilicate, synthetic layered silicate, citrate, ethylenediaminetetraacetate. , Nitrilotriacetate, polyacrylate and the like are used. The component (b) is contained in the entire composition in an amount of 3 to 50% by weight, preferably 10 to 40% by weight.

As the alkali agent of the component (c), carbonate,
Bicarbonates, orthosilicates, metasilicates and the like can be mentioned. As the salt, alkali metal salts such as sodium salt and potassium salt are preferable. The component (c) is incorporated in the entire composition in an amount of 30 to 80% by weight.

The component (d) polyether polyol is obtained by addition-polymerizing propylene oxide to a compound having 2 to 4 active hydrogens such as ethylene glycol, glycerin, trimethylolpropane and pentaerythritol. It has a molecular weight in the range of 2000 to 8000. Those obtained from ethylene glycol and glycerin are particularly preferable. Component (d) is 0.1 to 0.1% in the total composition.
5% by weight, preferably 0.5-3% by weight.

By further blending a higher fatty acid salt, preferably a fatty acid sodium salt whose raw material fatty acid has a titer (freezing point) of 20 ° C. or more, particularly 30 ° C. or more, into the powdery or granular nonionic detergent composition for clothes of the present invention, Rinseability can be improved. The higher fatty acid salt is contained in the entire composition in an amount of 1 to 10% by weight, preferably 2 to 8% by weight.

In addition to the above-mentioned components, the powdery, granular nonionic detergent composition for clothing of the present invention also comprises anti-redeposition agents such as carboxymethyl cellulose and polyethylene glycol, enzymes such as protease, amylase and cellulase, and fluorescent dyes. Ingredients such as pigments, fragrances and the like can be added.

The powdery, granular nonionic detergent composition for clothing of the present invention has 95% or more of particles having a particle size in the range of 200 to 2000 μm, the preferred particle size range is 300 to 1000 μm, and the average particle size is about The range from 650 to 750 μm is preferred.

[0013]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples. In the examples,% is based on weight unless otherwise specified.

Examples 1 to 6 and Comparative Examples 1 to 3 are sodium carbonate in a Nauter mixer having the composition shown in Table 1.
Add sodium tripolyphosphate and sodium metasilicate, add nonionic surfactant and polypropylene glycol with stirring, absorb them, then add the remaining ingredients and mix uniformly to prepare various powdered nonionic detergent compositions. Each of the prepared products was evaluated according to the following criteria for each cleaning power and foam breakage during rinsing. The results are shown in Table 1. <Evaluation of Detergency> Using a blood-contaminated cloth (No.111 cotton, manufactured by Swiss EMPA), the detergency of each composition shown in Table 1
Using a commercial washing machine (Economat 20, Asahi Seisakusho)
After washing at 60 ° C for 15 minutes, the reflectance of the blood-contaminated cloth before and after washing was measured (measurement wavelength: 520 nm), and the washing rate was calculated by the following formula to evaluate the washing power.

[0015]

[Equation 1]

<Rinseability> A 8.5 g sample of a powdery granular nonionic detergent composition for evaluation was used as a commercial washing machine (Economat 20,
(Manufactured by Asahi Seisakusho Co., Ltd.), 85 liters of water was added, and the mixture was stirred at 50 ° C. and 25 ° C. for 10 minutes under high water level rinsing conditions, and the foam height immediately after and 1 minute after was measured to evaluate rinsability.

[0017]

[Table 1]

Note) * Propylene oxide adduct of ethylene glycol ** Propylene oxide adduct of glycerin Example 7 and Comparative Example 4 Similar to Examples 1 to 6 and Comparative Examples 1 to 3, powdered and granular with the composition shown in Table 2. Nonionic detergent compositions were prepared and evaluated for foam breakage during rinsing in the same manner as in Examples 1-6 and Comparative Examples 1-3. The results are shown in Table 2.

[0019]

[Table 2]

Note) * Propylene oxide adduct of ethylene glycol

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area C11D 3:10 7:26)

Claims (2)

[Claims] 1. A nonionic surfactant of 5 to 30% by weight, a chelating agent of 3 to 50% by weight, and an alkaline agent of (c).
30-80% by weight and (d) 0.1-5% by weight of polyether polyol having a molecular weight of 2000-8000 obtained by addition-polymerizing propylene oxide to a compound having 2-4 active hydrogens. A powdery, granular nonionic detergent composition for clothing. 2. The powdery, granular nonionic detergent composition for clothing according to claim 1, which further contains 1 to 10% by weight of a higher fatty acid salt.