JPH02283800A - Granular detergent composition - Google Patents

Abstract

PURPOSE:To obtain a granular detergent composition for business use, excellent in storage stability, bleaching power, detergency, anti-caking properties and classification resistance by mixing a bleaching and cleaning agent containing a surface active agent and a peroxide with a bleaching activator comprising tetraacetylethylenediamine granulated with a specified binder. CONSTITUTION:A granular detergent composition for clothing, which contains 8-50wt.% anionic surface active agent (e.g. a salt of a 10-18C alkylbenzenesulfonic acid) and/or nonionic surface active agent (having an HLB of 8 to 18, preferably 8.5 to 13); 10-50wt.%, preferably 10-30wt.%, percarbonic acid salt or perboric acid salt; 1-25wt.% granular tetraacetylethylenediamine (granulated with a binder comprising a polyoxyethylene alkyl ether or carboxymethylcellulose having a melting point of 40-80 deg.C); 10-40wt.% zeolite and/or tripolyphosphate: 2-20wt.% heavy sodium carbonate; and 2-40wt.% light sodium carbonate.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a granular detergent composition suitable for washing clothes. More specifically, the present invention relates to a granular detergent composition that is storage stable, has excellent bleaching detergency, and has improved caking resistance and classification resistance, and is particularly suitable for commercial use.

[Conventional technology and its problems]

Conventionally, in commercial detergents, detergents containing peroxide have been widely used to enhance cleaning power at high temperatures. sodium, sodium silicate,
A commercial detergent containing sodium sulfate, sodium perborate, and carboxymethyl cellulose with good cleaning power is disclosed in JP-A-63-196698, which contains nonionic surfactants, soap, sodium carbonate, sodium silicate, and sodium perborate. A commercial detergent containing sodium tripolyphosphate and having good anti-caking properties and storage stability has been disclosed. However, the bleaching and cleaning power of these commercial detergents is not necessarily satisfactory.

[Means to solve the problem]

The present inventors investigated the possibility of incorporating tetraacetylethylenediamine, which is known as a bleach activator, in order to further enhance the bleaching power of the powdery detergent. As a result, if tetraacetylethylenediamine granulated using a specific binder is used together with heavy sodium carbonate and light sodium carbonate at a specific weight ratio, it will be storage stable, have excellent bleaching and detergency, and will be resistant to bleaching. It was discovered that a powdery detergent composition with good caking properties and classification resistance can be obtained, and the present invention was completed.

That is, the present invention comprises (a) 8 to 50% by weight of an anionic surfactant and/or nonionic surfactant (b)
Percarbonate or perborate 10-50% by weight (C)
Tetraacetylethylene diamine granulated using polyoxyethylene alkyl ether or carboxymethyl cellulose as a binder, with a melting point of 40 to 80°C
1-25% by weight (d) Zeolite and/or tripolyphosphate 10-40% by weight (e) Heavy sodium carbonate 2-20% by weight
and (f) light sodium carbonate 2-40% by weight
The object of the present invention is to provide a powdery cleaning composition characterized by containing the following.

(a) Anionic surfactants used in the present invention include alkylbenzene sulfonates having an average of 10 to 18 carbon atoms, alkyl sulfate ester salts having an average of 10 to 22 carbon atoms, olefin sulfonates having an average chain length of 12 to 18, α-sulfo fatty acid ester salt with average chain length of 10 to 18, average chain length of 1
Examples include salts of higher fatty acids of 0 to 22.

In addition, as the nonionic surfactant, which is the other component (a), polyoxyethylene alkyl ether or polyester having an alkyl group or alkenyl group having an average carbon number of 10 to 18 and to which 1 to 20 moles of ethylene oxide are added may be used. Oxyethylene alkenyl ether, average carbon number 6-1
Examples include polyoxyethylene alkylphenyl ether having 2 alkyl groups and 1 to 20 moles of ethylene oxide added thereto. Usually, these nonionic surfactants have an HLB of 8 to 18, preferably 8.5 to 13.

The above surfactant is blended in the composition in an amount of 8 to 50% by weight, but in detergents that use an anionic surfactant as the main cleaning base, the anionic surfactant is 20 to 40% by weight and the nonionic surfactant is used as the main cleaning base. It is desirable that the detergent used as a base contains 8 to 20% by weight of a nonionic surfactant.

(b) Percarbonate or perborate serving as a bleaching base:
Examples include sodium percarbonate, sodium perborate monohydrate, and sodium perborate tetrahydrate. Among these, sodium percarbonate is preferred, and particularly preferred is one obtained by treating sodium percarbonate powder with a coating agent containing a borate to coat the surface by the method described in JP-A-59-83912. The bleaching base is present in the composition in an amount of 10 to 50% by weight, preferably 10% by weight.
~30% by weight is blended.

(C) Tetraacetylethylenediamine, which is a bleach activator, contains polyoxyethylene alkyl ether or carboxymethyl cellulose with a melting point of 40 to 80°C in order to improve caking resistance and storage stability in the presence of a bleaching base. Granules used as binders are used. Among these, granules using polyoxyethylene (p=35-100) alkyl (C8-!t) ether as a binder are preferred because of their good solubility.Tetraacetylethylenediamine is contained in the composition in an amount of 1-25% by weight. It is blended.

Granulation of tetraacetylethylenediamine is carried out using 40 to 98 parts of tetraacetylethylenediamine and 2 parts of a binder.
~15 parts, and further other granulation aids as necessary, are supplied to a stirring transfer granulator or an extrusion granulator. The particle size of the granules is 125-3+wm, preferably 350-15m
It is preferable to adjust the particle size so that m particles account for 90% or more.

(d) Zeolite and/or tripolyphosphate are blended in the composition in an amount of 10 to 40% by weight, preferably 15 to 30% by weight, in order to enhance detergency and improve caking resistance.

(e) Heavy sodium carbonate has an apparent density of 1.05 g/
Fd or higher, (f) light sodium carbonate has an apparent density of 0
．． 8 g/d or less is used. Heavy sodium carbonate is used in the composition in an amount of 2 to 20% by weight, and light sodium carbonate is used in an amount of 2 to 40% by weight. If either one is used alone, the caking resistance may not be sufficient, and the bleaching base particles and the tetraacetylethylenediamine granulated particles tend to be classified. (e) heavy sodium carbonate and (f) light sodium carbonate have a weight ratio (e)/(f) of 0.15 to
It is desirable to use them together so that the value is within the range of 0.45.

The granular cleaning composition of the present invention includes polyacrylate,
Anti-recontamination agents such as carboxymethyl cellulose and polyethylene glycol; enzymes such as cellulase, protease, amylase, and lipase; fluorescent dyes; fragrances; fillers such as Glauber's salt; silicates, etc. can be blended.

[Examples] The present invention will be explained in more detail in the following Examples, but the present invention is not limited to these Examples. Note that the percentages in the examples are based on weight unless otherwise specified.

Fruit 1j1- Dense ash (heavy sodium carbonate) in Nauta mixer,
Add light ash (light sodium carbonate), add nonionic surfactant while stirring and allow it to be absorbed, then add sodium percarbonate, tetraacetylethylenediamine and the remaining ingredients and mix uniformly as shown in Table 1. A granular detergent composition having the following composition was obtained.

In addition, sodium percarbonate in a wet state (moisture 12%, dry average particle size 400μ) 3.
4 kg and sodium metaborate dihydrate (average particle size 150
μ) 0.1 kg was placed in a batch mixer, mixed for 1 minute, and the mixture was dried at 130° C. in a fluidized bed dryer to obtain coated sodium percarbonate.

In addition, as tetraacetylethylenediamine, tetraacetylethylenediamine (average particle size 80μ) 3.6
kg, polyoxyethylene (100 = 55) stearyl ether (0.36 kg) was charged into a mixer, the jacket temperature was set to 70"C, and the mixture was heated on a heating table for 30 minutes. This mixture was extruded and granulated to obtain a particle size of 350~ A 150μ one was used.

Using these granular detergent compositions, caking resistance and classifiability were evaluated according to the following criteria.

Caking Resistance〉 130 g of a sample of the granular detergent composition for evaluation was placed in a filter paper box, a load of 250 g was applied, and the sample was heated at 30°C, 40-80°C.
1 in a caking test chamber at %RH (96 Hr/cycle).
Store it for 0 days, carefully take out the sample, and make the inner diameter 5IIIM.
The weight ratio of the detergent solidified to 5III+ or more was determined using a sieve, and the ease of caking was evaluated.

The smaller the value, the better the caking resistance.

Classification property> A 100 g sample of the cleaning composition for evaluation was
Place it in a cylindrical container with a height of 30 cts, vibrate for 5 minutes using a rotary tube tester for particle size measurement, take out the upper layer, middle layer, and lower layer samples from the container, and check the concentration of sodium percarbonate in the sample and the tetraacetyl ethylene diamine. The quality of the classification property, which was evaluated by measuring the concentration of 0, indicates that the closer the concentrations of sodium percarbonate and tetraacetylethylenediamine in the upper, middle, and lower layers are to the same, the better.

These results are shown in Table-2.

Table-2

Claims (1)

[Claims] 1 (a) 8 to 50% by weight of anionic surfactant and/or nonionic surfactant (b) 10 to 50% by weight of percarbonate or perborate (c) Melting point of 40 to 80°C 1 to 25% by weight of tetraacetylethylenediamine granulated using polyoxyethylene alkyl ether or carboxymethyl cellulose as a binder (d) 10 to 25% by weight of zeolite and/or tripolyphosphate
40% by weight of (e) 2 to 20% by weight of heavy sodium carbonate; and (f) 2 to 40% by weight of light sodium carbonate. 2 (c) Tetraacetylethylenediamine is polyoxyethylene (@p@=35-100) alkyl (C_
8_-_2_2) The granular detergent composition according to claim 1, which is granulated using ether as a binder. 3. The powdery detergent composition according to claim 1 or 2, wherein the weight ratio (e)/(f) of (e) heavy sodium carbonate and (f) light sodium carbonate is 0.15 to 0.45.