JPS61231098A - Concentrated powder 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 Field of the Invention The present invention relates to concentrated detergent compositions, and more particularly to concentrated detergent compositions with improved water solubility.

[Conventional technology]

Conventionally, household powder detergents have often been manufactured as low-density powder detergents by spray drying, either because of the ease of manufacturing process that allows for mass production, or from the quality standpoint of having good solubility in water.

However, in recent years, there has been an increasing demand for compact powder detergents that can be used in a small amount per wash and have a large bulk density from the viewpoint of resource saving, transportation of detergent, and convenience for housewives to carry. As an attempt to reduce the amount of powdered detergent used per one wash and increase the bulk density, for example, Japanese Patent Application Laid-open No. 48-61511 discloses a method that contains 30% or more of surfactant and combines surfactant and detergent virgoo. Discloses a method for producing a detergent with a bulk density of 0.5 g/cm' or more by mixing in the state of an aqueous dispersion (slurry), drying with a drum dryer, and granulating with a granulator. .

In addition, JP-A No. 53-36508 discloses that the surfactant is 30 to 7
Discloses a method for producing a detergent having a bulk density of 0.558/cm' or more by dry mixing a powdered surfactant and a detergent builder.

[Problem that the invention seeks to solve]

However, it has been found that dense powder detergents made with such compositions generally do not have satisfactory dissolution rates. It is believed that this is because, by increasing the density, the powder detergent loses its porosity, which has a decisive effect on the dissolution rate.

[Means for solving problems]

The amount used by the present inventors per washing was 30g/30A.
! In particular, it is 20 to 30 g/301, and the bulk density is 0.
As a result of intensive research to improve the water solubility of compact concentrated powder detergents of 5 g/cm' or more, we found that (a) 25 to 50% (wt%, same hereinafter) of anionic surfactant, water-soluble Contains 0 to 10% of inorganic salt and has a bulk density of 0.5
g/cm' or more, (b) nonionic surfactant, and (c) polyethylene glycol (b)
+ (c) = 2-10%, (b)/(c) = 1/
The inventors have discovered that by containing the powder in a range of 4 to 4/1, it is possible to obtain a concentrated powder detergent with improved solubility in water, regardless of its porosity, leading to the present invention. It is.

That is, the present invention provides a concentrated powder detergent composition with high density and excellent water solubility by blending a specific ratio of a nonionic surfactant and polyethylene glycol to an anionic surfactant. It is something.

The details of why the concentrated powder detergent composition of the present invention has excellent solubility in water are not clear, but the combination of a specific ratio of nonionic surfactant and polyethylene glycol creates a concentrated anionic interface. It is believed that reducing the viscosity of the active agent solution improves its solubility in water, regardless of its porosity.

The content of the anionic surfactant of the present invention is 25-50%
, preferably in the range of 30 to 40%. Content is 25
% or less, 30g/30m per wash! If the amount used is below, sufficient cleaning performance cannot be achieved, and if it exceeds 50%, the effect of improving solubility will be insufficient, which is not preferable.

Examples of the anionic surfactant used in the present invention include the following.

1) A straight or branched alkylbenzene sulfonate having an alkyl group with an average carbon number of 10 to 16 2) A straight or branched chain alkyl group or alkenyl group having an average of 10 to 20 carbon atoms, 1 molecule in an average of 0.5 to 8 moles of ethylene oxide, propylene oxide, or butylene oxide, or in a ratio of ethylene oxide/propylene oxide = 0.1/9.9 to 9.9/0.1, or ethylene oxide/butylene oxide =
Alkyl or alkenyl ether sulfate added in a ratio of 0.1/9.9 to 9.910.1 3) Alkyl or alkenyl sulfate having an alkyl or alkenyl group having an average of 10 to 20 carbon atoms 4) Average of 10
Olefin sulfonates having ~20 carbon atoms in one molecule5) Alkanesulfonates having an average of 10 to 20 carbon atoms in one molecule6) Saturated acids having an average of 10 to 24 carbon atoms in one molecule or unsaturated fatty acid salt 7) having an alkyl group or alkenyl group with an average carbon number of 10 to 20, and an average of 0.5 to 8 moles per molecule of ethylene oxide, propylene oxide, butylene oxide, or ethylene oxide/propylene oxide = At a ratio of 0.1/9.9 to 9.910.1 or ethylene oxide/butylene oxide = 0
．． Alkyl or alkenyl ether carboxylic acid salts added in a ratio of 1/9.9 to 9.910.1 8) α-sulfo fatty acid salt or ester R-CHCO represented by the following formula! Y O3Z (wherein Y is an alkyl group having 1 to 3 carbon atoms or a counter ion, 2
is the counterion. (R represents an alkyl group or alkenyl group having 10 to 20 carbon atoms) Among the above, particularly preferred anionic surfactants are 1), 2), 3), 4
).

The content of the water-soluble neutral inorganic salt of the present invention is in the range of 10% or less, preferably 5% or less. If the content is 10% or more, if the amount used is less than 30g/301 per wash, it will be disadvantageous in terms of cleaning performance, which is not preferable.

Examples of water-soluble, neutral inorganic salts used in the present invention include Glauber's salt and the like.゛The bulk density of the detergent of the present invention is 0
．． 5 g/Cm' or more, preferably 0.5 to 1.5 g/c
m", particularly preferably 0.5 to 1.2 g/cm3, and even more preferably 0.7 to 1.2 g/cn+". This is because if it exceeds 1.5 g/c++3, there is a tendency for sedimentation in water to have an adverse effect on powder solubility.

(b) nonionic surfactant and (C) in the present invention
For polyethylene glycol, the content of (b) + (C) is 2-10%, preferably 3-7%, component (b)
The weight ratio of component (c) and component (c) is preferably 1/4 to 4/1, preferably 1/3 to 3/1.

If the content of (b) + (c) is less than 2%, the effect of improving solubility will be small, and if it is more than 10%, it will have an adverse effect on foaming properties. Furthermore, if the ratio (b)/(c) is less than 18 or more than 471, the effect of improving solubility will be insufficient.

As the nonionic surfactant used in the present invention, the following are preferred.

1) Polyoxyethylene alkyl or alkenyl ether having an average carbon number of 10 to 20 alkyl groups or alkenyl groups, to which 1 to 20 moles of ethylene oxide are added 2) Having an average carbon number of 6 to 12 alkyl groups, 1-20
Polyoxyethylene alkylphenyl ether with mol of ethylene oxide added 3) Average carbon number 10-2
Polyoxypropylene alkyl or alkenyl ether having 0 alkyl or alkenyl group and 1 to 20 moles of propylene oxide added 4) Higher fatty acid alkanolamide or its alkylene oxide adduct represented by the following general formula, item R 'R12'' (in the formula, R11' is an alkyl group or alkenyl group having 10 to 20 carbon atoms, R1□' is H or C1, and n
3 is an integer of 1 to 3, and m is an integer of 0 to 3. ) 5) Sucrose fatty acid ester consisting of a fatty acid with an average carbon number of 10 to 20 and sucrose 6) Fatty acid glycerin monoester consisting of a fatty acid with an average carbon number of 10 to 20 and glycerin 7) Alkylamine oxide represented by the following general formula RI4 "R13' N→0 1?ts" (In the formula, R1, " is an alkyl group or alkenyl group having 10 to 20 carbon atoms, and R111", R1, " is an alkyl group or alkenyl group having 1 to 20 carbon atoms.
3 is an alkyl group. ) Among these, polyoxyethylene alkyl ether is particularly preferred.

Further, the polyethylene glycol used in the present invention preferably has an average molecular weight of 2.000 to 30,000.

The particle size of the concentrated powder detergent of the present invention is preferably 2,000μ or less, more preferably 2.000μ or less and 125μ or less is 3% or less, and even more preferably 2.000μ or less is 125μ or less.
It is desirable that μ or less be 1% or less. This is because when the ratio of 125 μm or less increases, a state in which no mechanical force is applied during the initial stage of melting tends to persist, resulting in the formation of lumpy, difficult-to-dissolve materials. or,.

It is desirable that the content of 2.000μ or more is 10% or less, more preferably 5% or less, even more preferably 1% or less.

In addition, the following components can be blended into the powder detergent of the present invention.

(1) Surfactants such as betaine type amphoteric surfactants, sulfonic acid type amphoteric surfactants, phosphate ester type surfactants, cationic surfactants, etc. (2) Surfactants such as silicates, carbonates, sesquicarbonates, etc. Alkaline agent (3) Divalent metal ion scavenger such as zeolite (aluminosilicate), orthophosphate, pyrophosphate, tripolyphosphate, nitrilotriacetate, ethylenediaminetetraacetate, citrate, isocitrate ( 4) Anti-recontamination agents such as polyvinyl alcohol, polyvinylpyrrolidone, and carboxymethyl cellulose (5) Bleaching agents such as sodium percarbonate, sodium percarbonate, and sodium hydrogen peroxide adducts (6) Anti-recontamination agents such as protease, esterase, lipase, cellulase, etc. Enzymes (7) Other ingredients commonly used in detergents, such as anti-caking agents, bleach activators, peroxide stabilizers, antioxidants, fluorescent dyes, blue tinting agents, light-activated bleaches, fragrances, etc.This invention There are no particular limitations on the method for producing the concentrated powder detergent;
As shown in JP-A No. 53-36508, there is a method in which an alkali agent and an acid-resistant detergent component are added to an unneutralized anionic surfactant, and after neutralization, zeolite, tripoly, etc. are added and pulverized. It can be manufactured by a method of increasing the bulk density by granulating a powdered detergent by spray drying.

〔Effect of the invention〕

Although the concentrated powder detergent composition of the present invention has a high density, it has excellent not only water solubility but also detergency and foaming power.

〔Example〕

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples.

Example 1 Detergents having the formulation shown in Table 1 were manufactured, and their powder solubility and foaming power were compared and studied. The results are also shown in Table 1.

The detergent manufacturing method and methods for measuring powder bulk density, powder solubility, and foaming power will be explained below.

1) Detergent manufacturing method In this manufacturing method, the anionic surfactant as a starting material was used in an unneutralized acid form, but the detergent composition in Table 1 is described as the final detergent composition.

The parts other than the zeolites with compositions 1 to 9 are replaced with Nesconi Goo (
The product is supplied to Fuji Sangyo ■) and kneaded to neutralize the anionic surfactant. Thereafter, part of the zeolite (15%) was added and pulverized using a hammer mill, and the remainder (5%) was added and mixed using a Loedige mixer to obtain detergent powder.

2) Powder bulk density measurement Measured by the method of JIS K-3362 3) Powder solubility measurement 1 t of ion-exchanged water was kept at 10°C in a beaker, and detergent 0 was added.
．． Add 83g. After standing for 1 minute, the detergent solution was gently stirred with a magnetic stirrer, and the detergent solution was visually judged after 3 minutes.

○: Almost completely dissolved Δ; Some detergent remains ×: Quite a lot of detergent remains 4) Foaming power measurement Pour water 301 at 10°C and 40@DH into a two-tank washing machine.
Add 25g of detergent to it. Approximately 1 kg of clothing that has been worn for one day is then added, stirred for 10 minutes, and then visually judged for foaming.

O: Sufficient foaming Δ: Slightly low foaming ×: Very little foaming Experiment 1 Among L1-9, the products of the present invention that satisfied the powder solubility and foaming power were N12-4 and 7-8. Only.

Example 2 Detergents having the composition shown in Table 2 were manufactured, and their powder solubility and detergency were compared and studied. The results are also shown in Table 2.

The detergent manufacturing method and methods for measuring powder bulk density, powder solubility, and detergency will be explained below.

l) Detergent manufacturing method After removing a portion (5%) of zeolite from the formulation, spray-dry it using a conventional method, and then use a vertical stirring granulator.
A detergent powder was obtained by stirring and granulating the spray-dried product in the presence of a portion of zeolite and some water.

The detergent compositions in Table 2 are listed as final detergent compositions.

2) Powder bulk density measurement The method of Example 1 was used.

3) Measurement of powder solubility The method of Example 1 was used.

4) Measurement of cleaning power Add 12 artificially contaminated cloths of 10 x 10 cm to the detergent aqueous solution If.
Add another piece of uncontaminated cloth of the same size so that the bath ratio is 1760, and use a turbotometer to
Washing was carried out at 0 rpm under the following conditions.

The cleaning conditions and oil composition of the artificially contaminated cloth are as follows.

(Cleaning conditions) Cleaning time: 10 minutes Detergent concentration 0.083% Water hardness 4°DH Water temperature 20℃ Rinse with tap water for 5 minutes (Oil composition of artificially contaminated cloth) Cottonseed oil 60% Cholesterol 10 Oleic acid 10 Palmitic acid 10 Liquid and solid paraffin l.

The cleaning power is determined by measuring the reflectance of the original cloth before contamination (carbon blank is mixed in as an indicator due to regular use) and the contaminated cloth before and after cleaning with a self-recording colorimeter (manufactured by Shimadzu Corporation), and the cleaning rate (%) is calculated using the following formula. (The table shows the average value measured for 12 sheets).

Among experimental results 10 to 18, the product of the present invention satisfies the powder solubility and detergency in item 11. Na13-14. m16～
There are only 18.

Example 3 Detergents having the formulation shown in Table 3 were manufactured, and their powder solubility was compared and studied. The results are also shown in Table 3.

The detergent manufacturing method and the method for measuring powder bulk density and powder solubility will be explained below.

(2) Detergent manufacturing method After obtaining detergent powder by the method of Example 1, the powder was adjusted to have the particle size distribution shown in Table 3 using a vibrating sieve if necessary.

2) Powder bulk density measurement Measured by the method of Example 1 3) Powder solubility measurement Keep ion-exchanged water IIl at 10°C in a beaker and add detergent 0.
．． After adding 83 g and standing still for 3 minutes, the detergent solution was gently stirred with a magnetic stirrer, and after 3 minutes, the detergent solution was visually judged.

O: It has completely melted. △: A little detergent remains ×: Quite a lot of detergent remains

Claims (1)

[Scope of Claims] 1 Contains the following three components (a), (b) and (c), the content of component (a) is 25 to 50% by weight, the total of component (b) and component (c) The content is 2 to 10% by weight, and the component (b
) and component (c) is in the range of 1/4 to 4/1, the content of water-soluble neutral inorganic salt is 0 to 10% by weight, and the bulk density is 0.5 g/cm^ 3 or more concentrated powder detergent compositions. (a) Anionic surfactant (b) Nonionic surfactant (c) Polyethylene glycol 2 A patent claim having a particle size distribution of substantially no more than 2,000μ and 3% or less of 125μ or less A concentrated powder detergent composition according to scope 1.