JPS61231099A - 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 of blending 30% or more of a surfactant and combining the surfactant and detergent builder with an aqueous solution. Dispersion liquid (slurry)
This disclosure discloses a method for producing a detergent having a bulk density of 0.5 g/cm3 or more by mixing the detergents in the following state, drying them with a drum dryer, pushing them out, and granulating them 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 0.55 g/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 inventors per wash is 30g/307!
As a result of intensive research to improve the water solubility of compact concentrated powder detergents with a bulk density of 0.5 g/cm3 or more, we found that 25 to 50% (wt%) same), containing 0 to 10% of water-soluble inorganic salts,
and a powder detergent having a bulk density of 0.5 g/Cm" or more, (b) a polycarboxylic acid polymer or its salt, and (c)
) Polyethylene glycol (b) + (c) -2
By containing ~10% and (b)/(c) = 1/3 to 6/1, a concentrated powder detergent with improved water solubility regardless of its porosity can be obtained. They discovered that this is possible and came up with the present invention.

That is, the present invention provides a concentrated powder detergent composition with high density and excellent water solubility by blending a polycarboxylic acid polymer or its salt and polyethylene glycol in a specific ratio with an anionic surfactant. This is what we provide.

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 polycarboxylic acid polymer or its salt and polyethylene glycol has a high concentration of anion. It is believed that by reducing the viscosity of a surfactant solution, its solubility in water is improved 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
If the amount is less than 30 g/30 it per washing, especially 20 to 30 g/301, sufficient cleaning performance cannot be achieved, and if it is more than 50%, the effect of improving solubility will be insufficient, which is preferable. do not have.

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

■) Straight chain or branched alkylbenzene sulfonate having an alkyl group with an average carbon number of 10 to 16 2) A straight chain or branched chain alkyl group or alkenyl group having an average carbon number of 10 to 20, one 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) An average of 10 to 20 carbon atoms Olefin sulfonate having 20 carbon atoms in one molecule5) Alkanesulfonate having an average of 10 to 20 carbon atoms in one molecule6) Saturated 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 of ethylene oxide, propylene oxide, or butylene oxide in one molecule, or ethylene oxide/propylene oxide = 0 .1/9.9 to 9.910.1 or ethylene oxide/butylene oxide=0.
Alkyl or alkenyl ether carboxylate added at a ratio of 1/9.9 to 9.910.1 8) α-sulfo fatty acid salt or ester represented by the following formula (where Y is an alkyl having 1 to 3 carbon atoms) group or counterion, Z
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 30 g/30 i 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/cm, particularly preferably 0.5
~1.2g/cm'', more preferably 0.7~1.2g
/cm3 is desirable. If it exceeds 1.5 g/cm', there is a tendency for sedimentation in water to adversely affect powder solubility.

Regarding (b) polycarboxylic acid polymer or its salt and (c) polyethylene glycol in the present invention, (b)
) + The content of (c) is 2-10%, preferably 3-10%
8%, and the weight ratio of component (b) to component (c) is preferably 173 to 6/1, preferably 172 to 4/1. *The content of (b) + (c) is 2 % or less or 10% or more, or the ratio of (b) / Cc) is 1
Even if it is less than 73 or more than 671, the effect of improving solubility is small.

Examples of the polycarboxylic acid polymer or its salt used in the present invention include polyacrylic acid, polyacetal carboxylic acid, polyaconitic acid, polyitaconic acid, polycitraconic acid, polyfumaric acid, polymaleic acid, polymethaconic acid,
Poly-α-hydroxyacrylic acid, polyvinylphosphonic acid, sulfonated polymaleic acid, maleic anhydride-diisobutylene copolymer, maleic anhydride-styrene copolymer, maleic anhydride-methyl vinyl ether copolymer,
Maleic anhydride-ethylene copolymer, maleic anhydride-
Ethylene crosslink copolymer, maleic anhydride-vinyl acetate copolymer, maleic anhydride-acrylonitrile copolymer, maleic anhydride-acrylic ester copolymer, maleic anhydride-butadiene copolymer, maleic anhydride- Isoprene copolymer, poly-β-ketocarboxylic acid derived from maleic anhydride and carbon monoxide, itaconic acid, ethylene copolymer, itaconic acid-aconitic acid copolymer, itaconic acid-maleic acid copolymer, itacone Examples include acid-acrylic acid copolymers, malonic acid-methylene copolymers, methaconic acid-fumaric acid copolymers, and salts thereof.

As the polyacetal carboxylic acid polymer or its salt, those having the following structure described in JP-A-54-52196 can be used.

-+ CIO-).

OOM (wherein M is a group selected from the group consisting of alkali metals, ammonium, alkyl groups and alkanolamine groups, p is a number from 4 to 200 as an average value) Molecular weight is 1,000
-ioo, ooo are preferred, especially 4.000-30.
000 is good.

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. When the ratio of 125 μm or less increases, if a state in which no mechanical force is applied for a long time during the early stage of melting, lump-like, difficult-to-dissolve materials tend to form. Also, 2.000
It is desirable that μ 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.

(11) Surfactants such as betaine type amphoteric surfactants, sulfonic acid type amphoteric surfactants, phosphate ester type surfactants, and cationic surfactants (2) Alkali such as silicates, carbonates, and sesquicarbonates Agent (3) Divalent metal ion scavenger (4 ) polyvinyl alcohol, polyvinylpyrrolidone,
Anti-recontamination agents such as carboxymethyl cellulose (5) Bleaching agents such as sodium percarbonate, sodium percarbonate, and sodium hydrogen peroxide adducts (6) Enzymes such as protease, esterase, lipase, and cellulase (7) Other anti-caking agents , bleach activators, peroxide stabilizers, antioxidants, fluorescent dyes, blue tinting agents,
Ingredients commonly used in detergents such as photoactivated bleach and fragrances.The method for producing the concentrated powder detergent of the present invention is not particularly limited, but for example, the method disclosed in JP-A-48-61511,
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.

[Effects 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.

〔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 composition shown in Table 1 were manufactured, and their powder solubility was compared and studied. The results are also shown in Table 1.

The detergent manufacturing method and the method for measuring powder bulk density and powder solubility 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 of compositions 1 to 9 were removed using a Nesco kneader (
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 Ion-exchanged water 11 was kept at 10°C in a beaker, and detergent 0.
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; A little detergent remains ×: Considerable amount of detergent remaining Among experimental cases 1 to 9, the products of the present invention that satisfied the powder solubility were Arashi 2 to 4, Only I'lh7-8.

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.

1) Detergent manufacturing method After removing a portion (5%) of zeolite from the formulation, spray-dry it using a conventional method, then use a shaping 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 detergency Detergent aqueous solution 11 and 10 x IQaa artificially contaminated cloth 12
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.

(Washing conditions) Washing time 10 minutes Detergent concentration 0.083% Water hardness 4°DH Water temperature 20°C Rinse 5 minutes in tap water (oil composition of artificially contaminated cloth) Cottonseed oil 60% Cholesterol 10 Oleic acid 10 Palmitic acid 10 Liquid and solid paraffin 10 The cleaning power is determined by measuring the reflectance of the original cloth before contamination (carbon black is regularly mixed in as an indicator) and the contaminated cloth before and after cleaning using a scale colorimeter (manufactured by Shimadzu Corporation) and using the following formula: The cleaning rate (%) was determined (the table shows the average value measured for 12 sheets).

Among the original reflectance-washing and cutting reflectance experiments 11hlO to 18, the one that satisfied the powder solubility and cleaning power was the product of the present invention, 1tlL 11m13 to 14. N
116-18 only.

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.

1) Detergent manufacturing method After obtaining detergent powder by the method of Example 1, it 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 Deionized water 11 was kept at 10°C in a beaker, and 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.

○: It is 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 1/3 to 6/1, 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 composition. (a) Anionic surfactant (b) Polycarboxylic acid polymer or its salt (c) Polyethylene glycol 2 The concentrated powder detergent composition according to claim 1, wherein the polycarboxylate is sodium polyacrylate. thing. 3. The concentrated powder detergent composition according to claim 1, wherein the polycarboxylic acid polymer or its salt is a polyacetal carboxylic acid polymer or its salt. 4. The concentrated powder detergent composition according to claim 1, having a particle size distribution substantially free of particles of 2,000 microns or more and 3% or less of particles of 125 microns or less.