JP2015151546A - Powder detergent composition and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder detergent composition hardly generating solidification by moisture absorption even when using a chelator with good biodegradability, and having reduced dusting even when the amount of a surfactant is small and to provide a manufacturing method thereof.SOLUTION: There is provided a powder detergent composition containing following (A) component and (B) component and having bulk density of the composition itself of 650 to 1000 kg/m. (A) is granular methyl glycine diacetate trisodium salt having bulk density of 650 to 1000 kg/mof 5 to 50 mass%. (B) is one or two kinds of sodium carbonate selected from dense ash and light ash with a mass ratio of the dense ash and the light ash, dense ash/light ash=0 to 0.5 of 40 to 94.5 mass% as the total amount.

Description

  The present invention relates to a powder detergent composition and a method for producing the same.

  Conventionally, powdery detergents are widely used as detergents used in automatic dishwashers and laundry detergents for clothes. Examples of the components of general cleaning agents for automatic dishwashers and laundry cleaning agents include alkali agents, chelating agents, surfactants, and the like.

  As a chelating agent, sodium tripolyphosphate was the mainstream before, but since the eutrophication of lakes became a problem, there was no use of aminocarboxylic acid chelating agents or zeolites in the case of laundry detergents. Various phosphorus detergents have been developed. Particularly in recent years, L-glutamic acid diacetic acid tetrasodium salt and methylglycine diacetic acid trisodium salt (hereinafter abbreviated as MGDA), which have good biodegradability, have been added in consideration of the environment.

Patent Document 1 proposes to use MGDA together with a polyoxyethylene polyoxypropylene alkyl ether and an acrylic acid-maleic acid copolymer as a powder cleaning composition for clothing. However, MGDA has a strong hygroscopicity in the case of a powder product, and when applied to a powder composition as it is, there is a problem of causing deterioration of fluidity and caking. In order to eliminate the inconvenience of the composition by blending a chelating agent having a hygroscopic property, Patent Document 2 discloses a nonionic surfactant after mixing a specific ratio of an inorganic salt such as sodium carbonate and a biodegradable chelating agent such as MGDA. There has been proposed a production method of mixing the above. The improvement of the hygroscopic property of MGDA itself is also examined, and Patent Document 3 proposes a manufacturing method for spray granulating MGDA.
Furthermore, in consideration of the environment, there is also a demand for a detergent for clothing that has as few main surfactants as possible. Patent Document 4 proposes a washing method using a detergent composition that does not contain a surfactant and that essentially contains MGDA and a recontamination inhibitor.

Japanese Patent No. 5143376 Japanese Patent No. 5291918 Special table 2013-503119 Japanese Patent No. 4372823

  However, in Patent Documents 1, 2 and 4, since MGDA in a highly hygroscopic powder is used, it is not sufficient to prevent hygroscopicity, and spray granulated MGDA has a large particle size, Since the bulk density is light, there is a problem that classification occurs when added to a powder detergent composition. Furthermore, in the case of a cleaning composition that uses granulated MGDA with low hygroscopicity and suppresses the addition of a surfactant as much as possible in consideration of the environment, there is a problem that the formation of fine powder cannot be suppressed. Accordingly, an object of the present invention is to provide a powder detergent composition that has low moisture absorption while suppressing the dusting even when MGDA with good biodegradability is used, and when there is little surfactant.

The present invention includes the following components (A) and (B) to achieve the above object, and the powder density of the composition itself is 650 to 1000 kg / m ³ . Is the first gist.
(A) MGDA of granules having a bulk density of 650 to 1000 kg / m ³ , 5 to 50% by mass
(B) One or two kinds of sodium carbonate selected from dense ash and light ash, and the mass ratio of dense ash and light ash is dense ash / light ash = 0 to 0.5, and the total amount is 40-94.5% by mass

  Moreover, 0.5-3.0 mass% of polyhydric alcohol chosen from glycerin, propylene glycol, butylene glycol, sorbite, and ethylene glycol is included as (C) component, The powder cleaning agent of Claim 1 characterized by the above-mentioned. Let the composition be the second gist.

  Furthermore, after the whole amount of the light ash of the component (B) is charged, the whole amount of the component (C) is charged and stirred, and then the remaining components are charged and stirred. The gist of

  According to the present invention, there is provided a powder cleaning composition in which caking due to moisture absorption hardly occurs even when MGDA is used, and powdering is reduced even when the amount of surfactant is small.

  Next, the best mode for carrying out the present invention will be described in detail.

(A) A component is MGDA of the granule whose bulk density is 650-1000 kg / m < ³ >. Commercially available products include Triflon (registered trademark) M series of Compatate, Granules, and Granules SG manufactured by BASF.

  It is preferable that (A) component of this invention exists in the range of 5-50 mass%. That is, if it is less than 5.0% by mass, sufficient cleaning power cannot be obtained, and if it exceeds 50.0% by mass, the blending balance with other components is deteriorated, and insufficient cleaning power and classification are likely to occur. Preferably, it is mixed in the range of 10.0 to 40.0% by mass, and particularly preferably in the range of 15.0 to 35.0% by mass in view of the effect.

  Component (B) is one or two types of sodium carbonate selected from dense ash and light ash, the ratio of light ash to dense ash is 0.5 or less, and the total amount of dense ash and light ash is 40 to 94.5% by mass is preferable. That is, when the ratio of light ash to dense ash exceeds 0.5, the granule which is the component (A) in the powder cleaning composition during filling from the production kettle into a container or packaging material or during product transportation MGDA classifies. If the total amount of dense ash and light ash is less than 40% by mass, the detergency is insufficient, and if it exceeds 94.5% by mass, the balance with other components becomes poor. In particular, the range of 60 to 80% by mass is preferable from the viewpoint of the effect.

The bulk density of the product of the present invention can be controlled by the dense ash and light ash of the component (A) and the component (B). A preferred range is 650 to 1000 kg / m ³ . If it is less than 650 kg / m ³ , the capacity of the powder detergent composition that can be contained in a packaging material such as a container or a pouch is increased, the transportation cost is increased, and the number of uses per product is reduced. It will be disadvantageous. On the other hand, if it exceeds 1000 kg / m ³ , the MGDA of the granule (A) is classified so as to float on the upper part of the powder detergent composition by vibration during transportation.

  Considering the influence on the environment, when the amount of the surfactant is 2% or less with respect to the cleaning composition, the component (C) is further selected from glycerin, propylene glycol, butylene glycol, sorbit, and ethylene glycol. Powdering can be suppressed by adding one or more polyhydric alcohols. (C) It is preferable that a component is the range of 0.5-3.0 mass%. That is, if it is less than 0.5% by mass, it is insufficient to suppress the dusting, and if it exceeds 3.0% by mass, no further dusting prevention effect can be expected, which is economically disadvantageous. In particular, mixing in the range of 1.0 to 2.5% by mass is preferable in terms of effects.

  The method for producing the powder detergent composition of the present invention is as follows. After all the light ash of component (B) has been charged into the mixer, all of component (C) has been charged and mixed with stirring, and then component (A) and optional components are charged. And stirring and mixing.

  The light ash of the component (B) contains fine powder of 100 μm or less, and by making the component (C) come into contact with the light ash efficiently, the dusting of the fine powder can be suppressed. Even if components other than light ash are first charged into the mixer and then light ash is added after component (C) is added, the limited amount of component (C) can suppress the formation of fine powder. Have difficulty. The method of charging the component (C) is not limited, and there are a method of charging from a container onto light ash that is stirred and mixed at a constant speed, and a method of spraying from a spray nozzle.

  The mixer used in the present invention is not particularly limited. For example, a stirring mixer such as a ribbon mixer or a Nauta mixer (registered trademark, manufactured by Hosokawa Micron Corporation) or a container rotating mixer can be used. . Among these, a stirring type mixer is preferable in terms of mixing efficiency of the component (C) that is liquid and the component (B) that is powder.

  In addition, arbitrary other components can be suitably mix | blended with the cleaning composition of this invention suitably other than said each component as needed.

  For example, as chelating agents other than MGDA of component (A), alkali metals such as L-glutamic acid diacetic acid, aspartic acid diacetic acid, ethylenediaminesuccinic acid, hydroxysuccinic acid, or iminodisuccinic acid, nitrilotriacetic acid, ethylenediaminetetraacetic acid, tripolyphosphoric acid As salts and other builders, bicarbonates, phosphonates, silicates, sulfates, polymer polymers, oxygen bleaches, bleach activators, chlorine bleaches, enzymes, etc. may be added as appropriate it can. Further, known components such as fragrances, colorants such as dyes and pigments, corrosion inhibitors, antioxidants, anti-contamination agents, bactericides, antifoaming agents, and foam increasing agents can be blended. Low-foaming nonionic surfactants and fatty acid salts for dishwasher applications, anionic surfactants, nonionic surfactants, cationic surfactants, amphoteric surfactants for clothes laundry A surfactant such as an agent and a fluorescent brightening agent can also be added as appropriate.

  Next, examples will be described together with comparative examples. Moreover, the powder detergent composition of the present invention can be used in applications such as an automatic dishwasher detergent composition, a laundry detergent composition for clothes, a laundry tub detergent, and a piping decoloring agent.

[Examples 1-8, Comparative Examples 1-3]
Powder cleaning compositions having the compositions shown in Tables 1 to 3 below were prepared by the following method.
[Production Method 1]
(B) The light ash of component (A) was all charged into a stirring mixer, and then the entire amount of (C) component was stirred and mixed, and then (A) component and optional components were added and mixed.
[Production Method 2]
(B) Component light ash and components other than component (C) are all charged into the agitating mixer, then component (C) is all charged and mixed, and finally component (B) light ash is charged and mixed. did.
Each composition was evaluated for 4 items of bulk density, hygroscopicity, classification and anti-dusting properties. The results are also shown in Tables 1 to 3 below. In addition, the test method and evaluation method of each item are as shown below.

〔The bulk density〕
-Test method It measured based on JISK3362-1998.

[Hygroscopicity]
Test Method 50 g of the powder detergent composition was weighed out into a 100 ml plastic bottle and left in an open system at a temperature of 25 ° C. and humidity of 50% RH. After a certain period of time, the appearance of the powder cleaning composition was observed and visually judged according to the following evaluation criteria.
・ Evaluation criteria ◎: No moisture absorption and solidification is observed after one week.
X: Hygroscopic solidification was recognized by the determination after 5 hours.

[Classification]
・ Test method Weigh 200g of powder detergent composition into a 250ml plastic bottle, reciprocate 10 times to the left and right with the bottom of the bottle in contact with the laboratory table, and observe the appearance of the powder detergent composition. The visual evaluation was performed according to the following evaluation criteria.
Evaluation criteria A: There was no MGDA lift of the granules.
○: There was almost no MGDA lift of the granules.
(Triangle | delta): There existed MGDA lift of the granule.
X: The floating of MGDA of the granule was remarkable.

[Preventing dusting]
・ Test method Weigh 200g of powder detergent composition into a 250ml plastic bottle, shake the bottle vigorously up and down 30 times, immediately open the lid of the bottle, and observe the state of the fine powder rising, Visual judgment was performed according to the following evaluation criteria.
-Evaluation criteria A: There was no rise of fine powder.
○: There was almost no fine powder rising.
(Triangle | delta): There existed rising of fine powder.
X: The rise of fine powder was remarkable.

  In Tables 1 to 4 below, details of the components used are as follows, and the numerical values in the table are shown as they are.

[MGDA]
・ MGDA1 (component A)
Product name: Torriron M Glanules SG (registered trademark, manufactured by BASF)
Appearance: Granules Bulk density: 730 kg / m ³
・ MGDA2 (optional component)
Product name: Torriron M Powder (registered trademark, manufactured by BASF)
Appearance: Powder Bulk density: 700 kg / m ³

[Sodium carbonate] (component B)
・ Dense ash Sodium carbonate Product name: Dense soda ash (manufactured by Tokuyama)
・ Light ash Sodium carbonate Product name: Light soda ash (manufactured by Tokuyama)

[Polyhydric alcohol] (C component)
・ Polyhydric alcohol 1
Glycerin Product name: Purified glycerin (manufactured by Miyoshi Yushi Co., Ltd.)
・ Polyhydric alcohol 2
Propylene glycol Product name: Propylene glycol (Asahi Glass Co., Ltd.)
・ Polyhydric alcohol 3
Butylene glycol Product name: 1,3-butylene glycol-P (manufactured by KH Neochem)
・ Polyhydric alcohol 4
Sorbit Product name: Sorbitol F (70% pure product) (manufactured by Food Science Co., Ltd.)
・ Polyhydric alcohol 5
Ethylene glycol Product name: Ethylene glycol (manufactured by Nippon Shokubai Co., Ltd.)

[Optional ingredients]
Optional component 1-1: Nonionic surfactant 1
Mixture of polyoxyalkylene alkyl ether and polyalkylene glycol Product name: Dowfax DF-147 Defoamer (registered trademark, manufactured by The Dow Chemical Company)
Optional component 1-2: Nonionic surfactant 2
Polyoxyethylene alkyl ether Product name: Neodol 91-8 (registered trademark, manufactured by Shell Chemicals)
Optional component 2: Anionic surfactant Sodium lauryl sulfate Product name: EMAL 10PT (registered trademark, manufactured by Kao Corporation)
Optional component 3: Protease Product name: Sabinase 12T (registered trademark, manufactured by Novozymes)
Optional component 4: Amylase Product name: Termamyl 120T (registered trademark, manufactured by Novozymes)
Optional component 5: Sulfate Anhydrous sodium sulfate Product name: Neutral anhydrous bow glass (manufactured by Shikoku Kasei Co., Ltd.)

  From the above results, all of the example products obtained a good evaluation of “◯” or “◎” in any evaluation item, but the comparative example products showed “△” or “ There is an evaluation of “x”, which indicates that there is a problem in practical use.

  According to the present invention, it is possible to obtain a powder cleaning composition in which solidification due to moisture absorption hardly occurs even when a chelating agent having good biodegradability is used, and even when there are few surfactants, powdering is reduced.

Claims (3)

A powder detergent composition (A) having a bulk density of 650 to 1000 kg / m, comprising the following components (A) and (B), wherein the bulk density of the composition itself is 650 to 1000 kg / m ^3. Methyl glycine diacetic acid trisodium salt of granules which are ³ , 5-50% by weight
(B) One or two kinds of sodium carbonate selected from dense ash and light ash, and the mass ratio of dense ash and light ash is dense ash / light ash = 0 to 0.5, and the total amount is 40-94.5% by mass   Furthermore, 0.5-3.0 mass% of 1 or more types of polyhydric alcohol chosen from glycerin, propylene glycol, butylene glycol, sorbite, and ethylene glycol is included as (C) component. Powder cleaning composition   3. The method for producing a powder detergent composition according to claim 2, wherein after the entire amount of light ash of component (B) is charged, the entire amount of component C is charged and stirred, and then the remaining components are charged and stirred.