JPH0335098A - Granular detergent composition having high bulk density - Google Patents

Abstract

PURPOSE:To obtain the subject composition cleaning and simultaneously imparting flexibility to fiber and having improved solubility containing sulfonic acid salt of fatty and lower alkyl ester and bentonite in a specific ratio. CONSTITUTION:The aimed composition contains (A) 5-30wt.% sulfonic acid salt of lower alkyl ester of 8-22C fatty acid (e.g. sodium salt of alpha-sulfonic fatty ester) and (B) 3-20wt.% (preferably 5-20wt.%) bentonite having >=30ml/2g (preferably >=35ml/2g) swelling force expressed by initial water absorption for initial 10min.

Description

DETAILED DESCRIPTION OF THE INVENTION The above invention relates to high bulk density granular detergent compositions that are capable of imparting softness to fibers while simultaneously cleaning.

When washing clothes at home to make them softer, wash them with a detergent, rinse off the detergent ingredients with plenty of water, and then apply a cationic surfactant such as a quaternary ammonium salt. The method used was to add a fabric softener as the main ingredient.

This is because, although cationic surfactants have excellent softening effects and antistatic effects, they cannot provide sufficient softening effects when used together with detergents. This is because the cationic surfactant reacts with the anionic surfactant, which is the main component of detergent, to form a water-insoluble complex, or because the anionic surfactant stabilizes the dispersion and makes it difficult for clothing to absorb it. It is.

However, performing washing and softening separately requires extra time and effort, and consumers are demanding detergents that combine cleaning and softening.

On the other hand, it is also known that bentonite has a softening effect on cotton cloth, and it has been reported that the softening effect can be improved by using bentonite with a hydroxyl value of 25 or more (Japanese Patent Application Laid-Open No. 56-72094). Public bulletin).

In addition, conventional laundry detergents have a bulk density of 0.3g7 by adding a bulking agent (usually Glauber's salt is used) that hardly contributes to cleaning performance to the composition, and then spray drying this to a bulk density of 0.3g7.
It was produced as bead-like hollow particles of about cc.

However, such detergents have a low specific gravity and a low active agent concentration, which increases transportation costs and requires a considerable amount of space for storage and display.Furthermore, even in ordinary households, it is difficult to find a place to store them and it is difficult to measure them. Ta. So recently,
A method for producing a high bulk density granular detergent that can be cleaned with a small amount of detergent has been proposed (Japanese Patent Application Laid-Open No. 60-96698), and has been applied to the production of a high-density granular detergent.

High bulk density detergent particles are less soluble than conventional bead-like hollow particles, and an effective improvement has been desired.

The present invention is intended to provide a high bulk density granular detergent composition that can cleanse and impart excellent flexibility to fibers at the same time without adversely affecting detergency.

Another object of the present invention is to impart excellent flexibility to fibers at the same time as cleaning, and to improve the solubility of high bulk density granular detergents.

Mitoyo summer place A first high bulk density granular detergent composition of the present invention is.

It contains the following components (a) and (b), suppresses a decrease in detergency, and imparts flexibility while cleaning.

(a) Sulfonic acid salt of a fatty acid lower alkyl ester having 8 to 22 carbon atoms as a fatty acid residue: 5 to 30% by weight.

(b) Bentonite with a swelling power of 30rnQ/2g or more expressed by the initial water absorption amount for the first 10 minutes: 3~
20 parts by weight.

A second high bulk density granular detergent composition of the present invention is.

Contains the above (a) component and the following (c) component, (c)
The ingredients are mixed during the kneading process in the detergent manufacturing process,
At the same time as detergent, it imparts softness to clothing and improves the solubility of high bulk density detergents.

(c) Bentonite = 30-20% by weight.

The five present inventions will be explained in more detail below.

The sulfonate of fatty acid lower alkyl ester as component (a) is typically represented by the following general formula (]), which is α
- Also called sulfo fatty acid ester salt.

R1-CHCoOR" So□M ... (1) (R1: alkyl group R": C, lower alkyl group M: counter ion) Water-soluble salts are used as counter ions, but alkali metal salts, Particularly preferred are sodium salts.

Sulfonic acid salts of lower alkyl esters of saturated fatty acids are obtained by transesterification or esterification of fatty acids to obtain lower alkyl esters of fatty acids having a predetermined number of carbon atoms, and then reacted with a sulfonating agent such as sulfuric anhydride using an ordinary sulfonating apparatus. It is obtained by fermenting, ripening and whitening for 7 seconds as necessary, and then neutralizing it. It can also be obtained by converting a sulfonated fatty acid into a lower alkyl ester.

Sulfonic acid salts of lower alkyl esters of unsaturated fatty acids are also used, and are produced in the same manner as above using unsaturated fatty acids having a predetermined number of carbon atoms as starting materials.

As raw fatty acids, fatty acids with a predetermined number of carbon atoms derived from animals and plants derived from beef tallow, coconut oil, palm oil, etc., and synthetic fatty acids are used.

The fatty acid residue of the fatty acid lower alkyl ester sulfonate has 8 to 22 carbon atoms, preferably 10 to 18 carbon atoms.

Component (a) is blended in the detergent composition in an amount of 5 to 30% by weight.

As the component (b), bentonite having a large swelling power exceeding a specific value is used. This swelling power is the first 1
It is expressed as the initial water absorption amount for 0 minutes, and this value is 30wQ.
/2g or more, preferably 35ml/2g or more. When the swelling power is less than 30ml/2g,
It is not possible to impart excellent flexibility to the fibers.

Examples of such bentonite include Beam Gum T (Vanderbild 'i!5), Metalloid (manufactured by National Lead), Kunipia G (manufactured by Crimine Industries), and Western Bond (Appliad Industria1Ma).
Bentonite, component 6(b), is blended into the detergent composition of the present invention in an amount of 3 to 20% by weight, preferably 5 to 20% by weight. If this amount is less than 3% by weight, a sufficient softening effect cannot be obtained,
On the other hand, if it exceeds 20% by weight, the detergency will decrease.

(b) Ia of bentonite can be blended into the detergent at any step in the detergent manufacturing process, for example (
The desired purpose can also be achieved by mixing detergent particles containing the component b) with powder after manufacturing, but by blending in the kneading process as described below, the solubility can also be improved. It can be improved.

Bentonite is usually available in the form of a fine powder (average particle size of 250 μm or less), but it can be used as is, or it can be granulated by adding water or an organic binder and using methods such as extrusion granulation or transfer granulation. You can also do it. Furthermore, during this granulation, an inorganic substance such as magnesium sulfate or white carbon may be added as a performance improver.

In addition, by using the sulfonic acid salt of fatty acid lower alkyl ester as component (a) and incorporating bentonite, which is used as a softening component, during kneading in the detergent manufacturing process, a high bulk density detergent composition can be obtained. The solubility properties of substances can be improved. This bentonite [component (c)] is not particularly limited in its swelling power, and in addition to the bentonite exemplified as the component (b) above, Polklay 11PM-20
, Volflock 325 [American Colloid Company
), USA], Black Hill 0H-200, Wyoben, Wyoben (OIL WILL GRADE), Wyoben [EMIJLSTION GRADE: Manufactured by Wyo-Pen Inc. (OIL WILL GRADE).

United States], Yellowstone [Dresser Minerals Co., Ltd.]
Doresser Mineral) Ilf! ,US〕
, Western Bond, National [NL Palite Co. (B
aroidDivision of Interstr
ies)! ! a, United States] etc. are used.

As component (c), bentonite having a swelling power of 30n12/2g or more as described above can be used to improve the flexibility imparting effect.

Component (c) bentonite is blended in the detergent composition of the present invention in an amount of 3 to 20% by weight, preferably 5 to 20% by weight. If the blending amount is less than 3% by weight, sufficient softening effect and solubility improvement effect cannot be obtained.

On the other hand, if it exceeds 20% by weight, the detergency will decrease.

Detergent particles containing component (a) and bentonite are obtained by granulating each cleaning component to form a high bulk density composition having a bulk density of 0.5 to 1.2 g/cc.

As described in JP-A No. 62-597, this granulation method involves kneading detergent raw materials such as fatty acid lower alkyl ester sulfonate in a kneader.

It is obtained by mixing, crushing and granulating with a crusher such as a cutter mill type, and further mixing water-insoluble fine powder. In addition, some or all of the detergent ingredients may be spray-dried in advance,
A high bulk density granular detergent composition can also be produced by kneading and mixing this spray-dried product with the remaining detergent ingredients. Components such as enzymes may be blended in powder form into a single granulated detergent. In the present invention, bentonite is blended into the detergent dough and kneaded, and the kneading allows it to be uniformly dispersed in the detergent particles. ing.

In the detergent composition, in addition to the essential ingredients of the present invention.

Other usual detergent components such as surfactants and builders can be contained as optional components.

Examples of anionic surfactants include the following.

■) Linear alkylbenzene sulfonate having an alkyl group with an average carbon number of 8 to 16, 2) α-olefin sulfonate having an average carbon number of 10 to 20, 3) Alkyl sulfate having an average carbon number of 10 to 20, 4 ) an alkyl ether sulfate or an alkenyl ether sulfate having a linear or branched 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; 5) average carbon Number 10 to 22 saturated or unsaturated fatty acid salts.

6) α-sulfo fatty acid salt represented by the following general formula.

R-CHCO2Z SO□2 (2 in the formula is a counter ion, R is an alkyl group having 10 to 22 carbon atoms.) The counter ion in these anionic surfactants is usually an alkali metal salt such as sodium or potassium. is appropriate.

As the nonionic surfactant, the following are suitable.

(1) An E○ addition type nonionic surfactant in which an average of 3 to 10 moles of ethylene oxide (EO) is added to a primary or secondary alcohol having 8 to 18 carbon atoms.

(2) EO-PO addition type nonionic interface in which an average of 3 to 10 moles of ethylene oxide (EO) and an average of 3 to 10 moles of propylene oxide (PO) are added to a primary or secondary alcohol having 8 to 18 carbon atoms. Activator.

Additionally, zeolites (aluminosilicates), inorganic builders such as sodium tripolyphosphate and sodium pyrophosphate; sodium citrate.

Sodium ethylenediaminetetraacetate, nitrilotriacetate, sodium polyacrylate, sodium acrylate
Calcium ion scavenging builders such as anhydrous sodium maleate copolymer and polyacetal carboxylate; Alkali builders such as carbonates and silicates; Rinse improvers for soaps, etc.; para-toluene sulfonate, toluene sulfonate, xylene sulfonate , viscosity modifiers such as urea; enzymes such as protease, lipase, cellulase, amylase; cationic surfactants such as quaternary ammonium salts; bleaching agents, fragrances, pigments, etc. can be used.

According to the present invention, by blending (a) a sulfonate of a fatty acid lower alkyl ester and (b) bentonite having a specific swelling power into a high bulk density detergent composition, the detergency can be improved. It is possible to impart flexibility to the fibers at the same time as washing, while preventing any adverse effects on the fibers.

In addition, (a) a sulfonate of fatty acid lower alkyl ester and (c) bentonite are used in combination, and (e) bentonite is mixed together to form a high bulk density detergent composition. At the same time, it can impart flexibility and improve the dissolution properties of the detergent composition.

Hereinafter, the effects of the present invention will be specifically explained with reference to Examples, but prior to this, the measurement methods and evaluation methods employed in the Examples will be shown.

(1) 2.0 g of 21-force bentonite was added to 100 ml of purified water at 25°C.
Approximately 10
Add in batches. However, adjust the amount added at a time so that the sample added earlier does not stick to the inner wall and settles smoothly on the bottom of the cylinder. 10 minutes after the addition is complete, the apparent volume of #1 sample in the container is determined by the swelling power (r
ag/2g).

2 soft nylon tricot cloth (30 denier) 30g
x4 pieces acrylic jersey cloth 90g
x2 cotton towels 80g x2
Bleached cotton cloth 50gX4
Cotton knitted cloth 85gX4
The test fabric is pretreated by washing it for 15 minutes using a commercially available granular detergent and tap water at 60°C, and then rinsing it three times for 3 minutes each using tap water at 60°C.

Next, this pretreated test cloth was placed in a jet-type domestic electric washing machine, and the detergent composition to be tested and tap water at 25° C. were used at a detergent concentration of 0.0833%.

After washing for 10 minutes at a bath ratio of 30 times, dehydrating for 1 minute, rinsing with tap water at 25° C. for 3 minutes, and dehydrating for 1 minute, the procedure was repeated twice. Thereafter, the test fabric was air-dried for 24 hours, and first, the air-dried test fabric was conditioned at 25°C and 65% RH.

A cotton cloth was taken out of the test cloths thus obtained, and its feel was judged by five judges, and the softening effect of the detergent composition was evaluated based on the average of the five judges. The feel of the fabric was evaluated using the following criteria in comparison with the same procedure as above except that a detergent composition containing no bentonite was used, with the feel of the fabric being set as zero.

Extremely soft 5 points Quite soft 4 points Soft 3 points Slightly soft 2 points Slightly soft 1 point (3) Power snow value Method (i) Preparation of artificial stain Crystalline minerals such as kaolinite, nobemiculite, etc. A clay whose main component was dried at 200°C for 30 hours was used as an inorganic stain.

After dissolving 3.5 g of gelatin in 950 cc of water at about 40°C, it was
0.25 g of carbon black was dispersed in water using NEMATICA II). Next, 14.9 g of inorganic dirt was added and emulsified with a polytron, and 31.35 g of organic dirt was further added and emulsified and dispersed with a polytron to prepare a stable dirt bath. After immersing a 10 cm x 20 cm designated cleaning cloth (cotton cloth No. 60 designated by Japan Oil Chemists Association) in this dirt bath,
Rubber jl! ! Water was squeezed using two rolls to equalize the amount of dirt attached. After drying this soiled cloth at 105° C. for 30 minutes, both sides of the soiled cloth were rubbed 25 times on each side. This was cut into 5cm x 5cm pieces with a reflectance in the range of 42±2% and used as a dirty cloth. The soil composition of the artificially soiled cloth thus obtained is shown in Table A.

(The following is the margin) Table A (The following is the margin) (if) Cleaning method The cleaning device is a two-tank washing machine (Newly manufactured by Hitachi “Aozora J CP”)
S-520 type) was used.

The items to be washed were 10 pieces of the artificial soiled cloth sewn onto a worn skin shirt, giving a total weight of 1 kg.

Pour 3 hours of tap water at 25°C into a washing machine, add a predetermined amount of detergent composition and items to be washed to a concentration of 0.0833%, and wash for 1 hour. After washing, the cloth is dehydrated for 1 minute, then rinsed for 3 minutes, and after dehydration for 1 minute, rinsed for 3 minutes, the reflectance of the dirty cloth is measured, and the cleaning power is calculated using the following formula.

Detergency evaluation method R is the reflectance (%) measured by a Cari Zeiss ELREP IIO reflectance meter.

In addition, the cleaning power was evaluated using the artificial soiled cloth tested.

The average value of the sheets was used.

Put 25°C water IQ in a 4"2 beaker and push the conductivity measurement cell into it. Next, add 1g of the detergent composition to the water and stir at a speed of 25Orpm using a constant speed stirrer. The time required for 90% of the added detergent particles to dissolve was measured, and was determined as T.
A model S-8F was used.

LOL - Tekiichi Group Example 1 A high bulk density granular detergent composition having the composition shown in Table 1 below was prepared and its performance was evaluated, and the results are shown in Table 1 below (after Example 2).
It was shown to.

Here, the high bulk density granular detergent composition was prepared by separately producing detergent particles and bentonite particles and mixing them into powder as described below.

(1) Production of detergent particles From Table 1 below, each component except bentonite and enzymes is kneaded in a kneader, resulting in a dense mixture pellet (
2cIm square) and type A zeolite crusher (manufactured by Okada Seiko,
A fixed amount was fed to a speed mill (Model ND-30). At this time, 15° C. cold air was introduced together with the crushed material at a ratio of 15Q/kg of crushed material. The crusher uses crushing blades with a diameter of 15 cm and rotates at 3000 rpvs in 4 cross stages, and the screen is 2 m.
A punching metal with mφ and a hole area ratio of 20% was used.

Next, the obtained amount of crushed A-type zeolite with an average particle size of 3 μm was transferred to a transfer drum (D = 30c + lφ).

L=60cm) at a ratio of 97:3,
The coated product was discharged at 0 rpm and a residence time of 5 minutes to obtain high bulk density detergent particles (bulk density 0.8 g/cc).

(2) Production of bentonite particles A magnesium sulfate aqueous solution containing 10 to 50% by weight of bentonite is added and mixed with bentonite. At this time, the amount of magnesium sulfate after mixing is adjusted to be 3% by weight based on bentonite. This is granulated using an agglomeration granulator and then dried using a drier. Next, the particle size was adjusted to 1 mm+mn using a crusher and a sieve to obtain bentonite particles. In Table 1 below, it is shown as the amount of bentonite.

Example 2 A high bulk density detergent composition with Nα7,8 (Example) was obtained in the same manner as in Example 1, except that bentonite was added during kneading of detergent particles.

Further, in the same manner as in Example 1, detergent particles were mixed with bentonite particles to obtain a detergent composition of Nα9 (comparative example).

The solubility and flexibility of these detergent compositions and a control product (NnlO; no bentonite added) were evaluated, and the results are shown in Tables 2-2.

(Margin below)

Claims (1)

[Claims] 1. (a) Sulfonate of a fatty acid lower alkyl ester whose fatty acid residue has 8 to 22 carbon atoms: 5 to 30% by weight, (b) Expressed as the initial water absorption amount in the first 10 minutes. A high bulk density granular detergent composition comprising 3 to 20% by weight of bentonite having a swelling power of 30ml/2g or more. 2. (a) Sulfonic acid salt of a fatty acid lower alkyl ester in which the fatty acid residue has 8 to 22 carbon atoms: 5 to 30% by weight. (c) A high bulk density granular detergent composition containing 3 to 20% by weight of bentonite, which is kneaded with component (c) mixed therein during kneading in the detergent manufacturing process.