JPH01229100A - Detergent composition - Google Patents

Abstract

PURPOSE:To obtain the title inexpensive detergent composition, having fluidity and high solubility in water and capable of reducing pollution problems, by blending an alkane sulfonate with a specified amount of fine powdery silica and granulating or powdering. CONSTITUTION:(A) 100 pts.wt. alkane sulfonate preferably containing <=50% (especially 10-30%) water, (B) 0.5-15 pts.wt. fine powdery silica having <=5mum average diameter and 0.05-0.2 bulk specific gravity and, when needed, (C) 0.1-10 pts.wt. water-absorptive resin such as poly(sodium acrylate), poly(sodium maleate) or sodium salt of CMC are blended to provide the objective composition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a fluid granular or powder detergent composition containing an alkanesulfonate as a surfactant.

[Prior Art] Although alkanesulfonates have superior detergency compared to alkylbenzene sulfonates and α-olefin sulfonates, they are rarely used as powder detergents and are widely used. It is used in liquid or flake form. This is because the alkanesulfonate forms a sticky lump when powdered, making it impossible to obtain a dry powder with good fluidity required for a powder detergent.

For this reason, a method has been proposed in which an alkanesulfonate is blended with an alkali silicate and an alkali phosphate to form a powder (Japanese Unexamined Patent Publication No. 155506/1983).

[Problems to be Solved by the Invention] The method of blending and powdering the alkali silicate and alkali phosphate is as follows: 2 to 10 parts by weight of the alkali silicate and the alkali phosphate to 5 to 35 parts by weight of the alkanesulfonate. 5~
Since it contains a large amount of water-dissolvable inorganic substances, the solubility of the alkanesulfonate is somewhat reduced, and the amount of water is 1! The combination of large amounts of soluble inorganic substances and phosphorus poses problems in terms of pollution such as contamination of rivers, lakes, and marshes, eutrophication, and the problem that it is difficult to produce weakly alkaline detergents with excellent storage stability. Furthermore, alkali silicates and alkali phosphates are relatively expensive, which is a factor that increases the manufacturing cost of detergents.

The present invention is intended to solve such problems, and an object of the present invention is to incorporate only a very small amount of water-insoluble inorganic substances, to increase the solubility of alkanesulfonate in water, and to avoid pollution problems. It is an object of the present invention to provide a detergent composition containing an alkanesulfonate which is granular or powdered and which reduces the amount of alcohol used.

[Means for solving the problems] The present invention provides that, for 100 parts by weight of alkanesulfonate,
It consists of 0.5 to 15 parts by weight of finely powdered silica, and further 0.1 to 10 parts by weight of a water-absorbing resin, if desired, and granulated or powdered.

In the present invention, the alkanesulfonate preferably contains at least 50% water, particularly 10 to 30% water. If it contains a large amount of water, it may be difficult to powder it as it is, or it may require a large amount of water-absorbing resin, which is not economical.

Therefore, when using an alkanesulfonate with a high water content, it is better to dehydrate it in advance to reduce the water content.Also, if the water content is less than 10%, dispersion and mixing of other ingredients such as finely powdered silica will be difficult. This is not very preferable since it deteriorates and the solubility in water also decreases.

Alkanesulfonates are generally produced by methods such as oxysulfonation or chlorosulfonation, and there is no problem in using products produced by either of these methods, but in particular, alkanesulfonates with an alkyl group Those containing 40% or more of straight chain carbon atoms with 15 or more carbon atoms and 80% or more of monosulfonate are preferred in terms of detergency and water solubility.

In the present invention, 0.5 to 15 parts by weight of finely powdered silica is arranged with respect to 100 parts by weight of this alkanesulfonate. However, if the amount of finely powdered silica is 0.5 parts by weight or less, The tackiness of the sulfonate is not improved, and fluidity cannot be obtained even if it is granulated or powdered. In addition, the larger the amount of finely powdered silica is, the more a granular or powdery detergent composition with excellent drying properties and fluidity can be obtained. Against 15
If the amount exceeds 1 part by weight, no significant improvement in effectiveness will be observed compared to the proportion of increase in the amount blended, and this is not desirable from the standpoint of pollution.

The fine powder silica referred to in the present invention has an average particle size of 5 μm or less and a bulk specific gravity of 0.05 to 0.2, and Aerosil 200
(manufactured by Nippon Aerosil Co., Ltd.), Rheosil QS-102 (
Tokuyama Sodasha 11. ), Carplex FPS-1, F
Those commercially available under trade names such as PS-3, FPS-4 (manufactured by Geotsugi Pharmaceutical Co., Ltd.), and Nip Seal NS-T (manufactured by Nippon Silikani Gyo Co., Ltd.) can be used. Although these finely powdered silicas are water-insoluble, they have excellent water dispersibility and hardly remain on fibers during washing.

Further, in the present invention, a water-absorbing resin is blended if desired. This water-absorbing resin is particularly effective when added when the alkanesulfonate has a high water content. The composition of this water-absorbing resin depends on the amount of water in the alkanesulfonate, but if the water content is 10 to 50% by weight, the content is 0.1 to 0.1 to 100 parts by weight per 100 parts by weight of the alkanesulfonate.
Adjust as appropriate within the range of 5 parts by weight.

Of course, it is not necessarily necessary to combine them.
The water-absorbing resin preferably has a film-forming ability and is not water-insoluble, such as polyacrylic acid, polymaleic acid, carboxymethyl cellulose, alginic acid, a copolymer of vinyl methyl ether and maleic anhydride,
Polyvinyl pyrrolidone, copolymer of acetic acid-maleic anhydride, copolymer of diacetone acrylamide and acrylic acid, urethanized polyvinyl alcohol, polyvinylamide, cyclodextrin, cellulose grafted polyacrylamide, gelatin grafted polyacrylamide, Urethane-modified cyclodextrin, polyvinyl butyral, Kowara's salt, etc. can be used, but it is particularly preferable to use sodium polyacrylate, sodium polymaleate, sodium carboxymethylcellulose, sodium alginate, etc.

In addition, in the present invention, in addition to the above components, alkylbenzene sulfonate, α-olefin sulfonate,
Alkyl or alkenyl sulfate, ether sulfate, fatty acid salt, ether carboxylate, α-sulfo fatty acid salt or its ester, carboxy or sulfobetaine type surfactant, polyoxyalkylene alkyl or alkenyl ether, polyoxyethylene alkylphenyl ether Anionic, amphoteric or nonionic surfactants such as
Divalent metal ion scavengers such as phosphates, polyphosphates, phosphonocarboxylates, amino acid salts, and aminopolyacetates, alkaline agents such as sodium silicate and sodium sulfate, polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone, Do not use recontamination preventive agents such as carboxymethyl cellulose, bleaching agents such as sodium percarbonate, sodium percarbonate, sodium sulfate hydrogen peroxide adduct, sodium chloride hydrogen peroxide adduct, fluorescent paints, fragrances, enzymes, etc. Needless to say, they may be combined. In this case, the content of alkanesulfonate is preferably 15% by weight or more. 1
This is because if the amount is less than 5% by weight, it will be difficult to obtain a good cleaning effect produced by incorporating the alkanesulfonate.

A composition blended in this way is granulated or powdered after being thoroughly mixed, but after blending and mixing the alkanesulfonate, finely powdered silica, and a water-absorbing resin that is optionally blended, it is granulated or powdered. For other ingredients, it can be done either by mixing them separately and blending them into granules or powders, or by mixing all the ingredients from the beginning and making them into granules or powders. Needless to say, it's a good thing.

Granulation or pulverization is carried out by generally known methods, such as granulation using a rolling granulator, extrusion granulator, hammer mill, ■-blender, ribbon mixer, freeze-thaw pulverizer, etc.
This can be easily done by crushing or the like.

[Example 2] A granular detergent composition having the formulation shown in Table 1 was produced by the following method.

5AS-60, sodium polyacrylate and Aerosil 20
0 into a blender, rotate at a high speed of 30 rpm, then sprinkle half of the total amount of sodium sulfate together with AE from above at a constant rate for 10 minutes, while stirring.
The remaining ingredients were then sequentially added.

Thereafter, the particle size was adjusted by passing through a sieve with a particle size of 1 m = 0 and 1 un, to obtain a powder product with an apparent specific gravity of 0.75.

In addition, it was found that if it is desired to increase the apparent specific gravity, stirring may be continued further.

Confirmed using the method specified in JIS-3362, the P)I is 10.3 at 1% concentration and the polished specific gravity is 0.75.
, the active ingredient was 27%.

EO29) In addition, the alkanesulfonate having 15 carbon atoms is 50
%, 90% sodium monosulfonate, 60% by weight aqueous solution was used, and the fine powder silica was commercially available Aerosil 200 (particle size 0.5μ bulk specific gravity 0.05: manufactured by Nippon Aerosil Co., Ltd.) and sodium polyacrylate (average molecular weight 6000) were used as the water-absorbing resin.

The resulting granules were subjected to a visual fluidity test, an anti-caking test, a detergency test, and a dispersion solubility test using the methods described below. These results are the second
Shown in the table.

(Anti-Caking Test Method) Fill a 100g weighing bottle with a sample, leave the sample in a constant temperature and humidity condition at a relative humidity of 75°C and a temperature of 35°C for 3 months, and then observe the clumps. The 0 criteria for visual judgment was as follows: No problem at all, △ when Ol clumps were formed, and × when there was a considerable amount of solidified matter.

(Cleaning power test method) Using Terg-0-Tometer, 150r
At a rotation speed of pm, add 10 contaminated cloths, 3 additive cloths (60 μm of oily dirt attached to each cloth), and clean knitted cloth, adjust the bath ratio to 1:30, and wash for 10 minutes. A detergency test was conducted at a cleaning temperature of 25° C. and using pure water as the water used.

The cleaning rate (D) was calculated using the following formula.

D=(Rw-Rs/Ro-Rs)X 100 (%)
Here, Ro: Reflectance of clean cloth R8: Reflectance of contaminated cloth before cleaning R: Reflectance of contaminated cloth after cleaning Note that the reflectance of clean cloth is 85%, and the reflectance of contaminated cloth is 35%.
It was evaluated as

In addition, the contaminated cloth was prepared by the following method.

■As a standard cloth 1 Cotton cloth specified by the Japan Oil Chemists' Society (warp and width 60 count, thread density warp and width 39 threads/as unbleached cloth)
The material was desensitized, refined, bleached, and dried at 105°C for 3 hours.

■Carbon black is compressed grade 6 carbon black.
The sample was dried at 05°C for 3 hours.

■ As mud sludge components, mud, diluvial plateau, and red-yellow soil are suspended in water, passed through a 74 μm sieve, and air-dried.
It was dried at 00° C. for 24 hours and crushed to an average size of 1 μm using a pulverizer.

First, 3.5 g (dry weight basis) of protein (gelatin) was dissolved in 950 raQ of water at 40°C, and carbon black 0
．． Add 5g and disperse using an emulsifier. There,
Furthermore, 15.0 g of the above mud sludge components were added and continuously dispersed, and further 31.5 g of organic sludge components other than protein were added.
Add and emulsify to prepare a pollution bath.

Next, in the pollution bath, 10 cs X 20a of the above standard cloth
After soaking the cloth and stirring to prevent the dirt dispersion from settling, the cloth was sufficiently covered with dirt, and then the cloth was squeezed using two rubber rolls. This was air-dried for 30 minutes to 1 hour, leaving 2.0 to 2.3 times as much water as the cloth, and used as a contaminated cloth.

(Dispersion solubility test method) Using a fully automatic washing machine, place 40g of the detergent prepared above in one place at the bottom of the washing machine, place 2kg of clothing on top of the detergent, and pour tap water at a flow rate of 8Q/min. I poured water slowly over 5 minutes until the detergent reached 40Q, making sure not to let the water hit the detergent directly. After that, stirring was started, and after 3 minutes and 5 minutes of stirring, the stirring was stopped, the water was drained, and after 3 minutes of dehydration, the presence of residual detergent was visually judged.
, those with a slight amount of residue were rated Δ, and those with a large amount of residue were rated ×.

From the above results, by blending finely powdered silica with alkanesulfonate, granules or powders with good fluidity can be obtained, and these have excellent detergency, dispersion solubility, etc. I can see that

[Effects of the Invention] As described above, the present invention blends alkanesulfonate with finely powdered silica, so that it can be made into a dry granule or powder form with good fluidity, and has excellent detergency. It can be a cleaning composition with reduced pollution problems, etc.
It has a special effect.

Claims (2)

[Claims] (1) A detergent composition comprising 0.5 to 15 parts by weight of finely powdered silica mixed with 100 parts by weight of an alkanesulfonate salt and granulated or powdered. (2) 0.5 to 15 parts by weight of fine powder silica and 0.1 to 10 parts by weight of water-absorbing resin per 100 parts by weight of alkanesulfonate
A detergent composition formed by blending parts by weight into granules or powder.