KR0154214B1 - Low pollutional concentrated detergent composition having excellent storage stability - Google Patents

Abstract

The present invention blends polyethylene glycol or polypropylene glycol as a coagulant to a detergent component composed mainly of a natural surfactant, and replaces a conventional counter current spray drying apparatus (Vertical Type High Speed Mixer or Lodige). The present invention relates to a powder detergent composition prepared by applying a specific method using a mixer, wherein the composition has low pollution and improved storage stability.

Description

Low pollution concentration detergent composition with excellent storage stability

The present invention relates to a low pollution concentrated powder detergent composition and a method for producing the same, which are excellent in storage stability and can minimize environmental pollution.

More specifically, the present invention blends a coagulant into a detergent component based on a natural surfactant and substitutes a conventional counter-current spray drying apparatus (Vertical Type High Speed Mixer or Lodige Mixer). The present invention relates to a powder detergent composition prepared by applying a specific method using a low-pollution and improved storage stability.

In general, various methods are known for manufacturing laundry detergent, but among them, a method using a countercurrent spray drying tower, which is easy to mass produce and has good particle uniformity, is widely used. However, detergents produced by this method may cause caking during long-term storage, and because of the high price of countercurrent drying equipment, facility costs are invested a lot, and a large amount of energy is required for drying, which is not economical. Has its drawbacks. In addition, in order to granulate a mixture composed of surfactants, builders, and other additives, agglomerates should be formed using a suitable liquid binder capable of agglomerating each component particle, followed by applying a water-insoluble fluid aid to the particle to make the particles. In this case, when the binding strength of the liquid binder is weak, coagulation between the mixed detergents does not occur, which makes it difficult to manufacture a detergent having a apparent density of 0.6 g / cm 3 or more, which is the basis of general high-density detergents. There is this.

Meanwhile, Japanese Patent Publication No. 78-43710 and Japanese Patent Publication No. 87-263299 are well known as prior arts proposed to solve the storage stability of detergents. Among them, Japanese Patent Application Laid-Open No. 78-43710 is spray dried. Disclosed is a method of granulating a powder detergent by absorbing a nonionic surfactant in a prepared builder component, and Japanese Patent Application Laid-Open No. 87-263299 discloses a solid detergent obtained by mixing zeolite, hard sodium carbonate, and a nonionic surfactant. It is reported how to obtain a powdery high density detergent by crushing using a high speed rotary granulator.

However, the detergents prepared by the above-mentioned methods are non-ionic surfactants absorbed in the liquid state in the builder particles, so that the non-ionic surfactants flow out of the particles when stored for a long period of time, resulting in poor fluidity of the detergents and lumps of detergents. As well as the phenomenon of hardening (Caking) occurs, there is still a problem such as high solubility of water-insoluble inorganic matters, such as poor solubility.

Therefore, the present inventors have diligently researched to solve the above-mentioned problems. As a result, when the detergent is manufactured using a high-speed rotary granulator, instead of using a suitable coagulant and using a countercurrent spray drying device, The non-ionic surfactant of the present invention was found to be capable of producing a low pollution concentrated detergent having an apparent density of 0.6 to 1.3 g / cm 3 and greatly improved fluidity caking resistance, washing power and productivity without being absorbed by the nonionic surfactant. It was completed.

Hereinafter, the configuration of the present invention will be described in detail.

The present invention is 10 to 45% by weight natural surfactant, 10 to 40% by weight sodium carbonate, 3 to 15% by weight nonionic surfactant 0.5 to 10% by weight coagulant, 10 to 50% by weight flow aid and 0.3 to 10% by weight additive It relates to a low pollution concentrated powder detergent composition comprising a.

As the natural surfactant used as the main cleaning component in the powder detergent composition according to the present invention, it is preferable to use a compound of the general formula (I), in particular the apparent density of the surfactant powder is 0.5 to 1.4 g / cm 3, The average particle size is 250 to 700 mu m, and preferably 250 mu m or less has a particle size distribution of 25 wt% or less.

RO-SO ₃ Na (Ⅰ)

Wherein R represents C ₁₀ 0-C ₁₈ alkyl. In the present invention, by using a natural surfactant in the content of 10 to 45% by weight as described above, a low-pollution detergent that can reduce environmental pollution as much as possible compared to the case of using a conventional synthetic surfactant as the main cleaning component.

As a nonionic surfactant, the alkyl ethoxylate of the following general formula (II) is used.

RO (CH ₂ CH ₂ O) _n H (II)

In the above formula,

R represents C ₁₀ -C ₂₀ alkyl and n represents an integer from 1 to 20.

When the nonionic surfactant is used at less than 3% by weight, there is a problem such as insufficient binding between particles, resulting in dust generation, fluidity decrease and detergency, and when the nonionic surfactant exceeds 15% by weight, the liquid component is excessive. Due to the problem that the particle surface is wet and the powder fluidity is inferior, it is used in the range of 3 to 15% by weight.

As the coagulant, one kind selected from polyethylene glycol [HO (CH ₂ CH ₂ O) _n H] and polypropylene glycol [HO (CH ₂ CH ₂ CH ₂ O) _n H] is in the range of 0.5 to 10% by weight. use. If the amount is less than 0.5% by weight, the formation of particles is difficult. If the content is more than 10% by weight, the solubility decreases as the hardness of the grown particles increases, which may lead to a deterioration of cleaning power. In addition, the average molecular weight of polyethylene glycol and polypropylene glycol is preferably from 1,000 to 25,000, because when less than 1,000, the action of coagulating nonionic surfactant is weak, and when it exceeds 25,000, the solubility is deteriorated. . In the present invention, the binding coagulant is absorbed by the particles in the state dissolved in the nonionic surfactant, thereby increasing the binding strength and strength of the particles, and consequently, plays a central role in improving the storage safety of the powder detergent composition according to the present invention. do.

Among the above-described components, the nonionic surfactant and the coagulant constitute a liquid binding component together with a fluorescent brightener, which is one of the additives described below, and the liquid binding component is added to sodium carbonate in the preparation of the powder detergent according to the present invention. Sprayed to form a contact between the particles.

Sodium carbonate has a pore structure in the particles and has a large specific surface area to absorb a nonionic surfactant in the liquid state, thus exhibiting the effect of improving fluidity and stability, and preferably 10 to 40 wt%. If it is less than 10% by weight, the non-ionic surfactant has a weak absorption effect, and when it is used in excess of 40% by weight, the content of other components is relatively small, so that it does not exhibit sufficient cleaning performance and the apparent density becomes low. A problem arises.

It is preferable to use 10 to 50% by weight of powder zeolite as the flow aid. If the amount of powdered zeolite is less than 10% by weight, the absolute amount applied to the surface of the particles is insufficient, resulting in poor flowability, and when the amount of the powdered zeolite exceeds 50% by weight, the particle size becomes smaller and fluidity is lowered. There is a disadvantage of poor workability.

Meanwhile. As additives usable in the present invention, mention may be made of perfumes, optical brighteners (stilbene-based, biphenyl-based, paraffin-based, fumarin-based, quinolone-based), enzymes (proteases, amylases, lipases, cellulase), and bubble control agents. Can be. It is preferable to use the total content of the additive within the range of 0.3 to 10% by weight. If it is less than 0.3% by weight, the performance of each additive is not easy to be expressed. Because. On the other hand, the preferred amount of each additive is 0.1 to 2% by weight in the case of fluorescent brightener, 0.1 to 3% by weight in the case of perfume, 0.1 to 5% by weight in the case of enzyme.

The low-pollution powder detergent composition according to the present invention having the components and the composition ratio as described above is manufactured according to a specific method which does not use a conventional countercurrent spray drying apparatus, so that the desired object of the present invention can be more effectively achieved. It is also an object to provide such a manufacturing method. Therefore, it demonstrates centering on the manufacturing method of this invention below.

In order to prepare the powder detergent composition according to the present invention, first, sodium carbonate is added to a high-speed rotary granulator, and the liquid-bound component obtained by heating and dissolving the nonionic surfactant, the coagulant and the optical brightener at 50 to 80 ° C. in advance is sprayed and absorbed thereto. And granulate by uniformly stirring, and then mixing the flow aid, natural surfactant, and other additives with the formed particles in sequence.

At this time, the liquid-bonding component is preferably dissolved by heating at a temperature of 60 to 70 ℃, in the process of spray-absorbing it to sodium carbonate, which is a non-ionic surfactant absorbing component by operating a grinder mounted on a high-speed rotary granulator uniformly mixed particles To form. Once the particles are formed, the mixing process is performed while the remaining components are added without further operating the grinder.

The most characteristic configuration in the production method according to the present invention is that a countercurrent spray drying apparatus is not used to improve the storage stability of the prepared powder detergent. That is, the present invention uses a high-speed rotary granulator equipped with a pulverizer instead of the countercurrent spray drying apparatus, and this structural feature shows a significant improvement in storage stability by being combined with a configuration using a coagulant.

Hereinafter, the present invention will be described in more detail based on the following examples.

However, these examples are only for the understanding of the present invention, and the scope of the present invention in any sense is not limited to these examples.

[Comparative Examples 1-2 and Examples 1-3]

The detergent compositions of Comparative Examples and Examples were prepared according to the composition ratios shown in Table 1 below. However, the composition of the comparative example was prepared by a basic countercurrent spray drying apparatus, and the composition of the example was prepared using a high speed rotary granulator equipped with a grinder instead of the countercurrent spray drying apparatus.

* 2: Alkyl ethoxylate (C12, ethylene oxide addition number 7, AE-7 (Korean polyol))

* 3 Sodium lauryl sulfate (C12)

* 4: Natural surfactant powder

* 6: polyethylene glycol

* 10: Tinopal CBS-X of biphenyl shivagaigi

* 11: Other additives are trace additives such as enzymes, bubble regulators, and fragrances

Experimental Example 1: Evaluation of Cleaning Power

The cleaning powers of the highly concentrated low pollution powder detergents prepared in Examples and Comparative Examples were evaluated under the following conditions, and the results are shown in Table 2.

Washing Machine: Terg-0-Tometer

Cleaning temperature: 25 ℃

Number of washes: Hardness 80ppm Ca ++, 20 ppm Mg ++

Bath ratio: 4.5g contaminated cloth / 1ℓ washing water

Contaminated salt: EMPA Art No. 102 (olive oil, carbon black / blend (polyester / cotton))

Detergent Concentration: 0.67g / ℓ

Evaluation: Converting the cleaning power to Comparative Example 1 as 100

Experimental Example 2: Evaluation of Fluidity

The fluidity evaluation was performed by measuring the time it takes for each 100 ml of the low pollution concentrated powder detergent prepared in Examples 1 to 3 and Comparative Examples 1 to 2 to pass through a funnel of 10 mm straight and the results are shown in Table 2.

Experimental Example 3: Evaluation of Caking

500 g of the low pollutant concentrate powder prepared in Examples 1 to 3 and Comparative Examples 1 to 2 was placed in a 1 L beaker. A load of 1 kg was applied to each detergent and stored for 10 days at a temperature of 30 ° C. and a relative humidity of 80%. The sample was taken and the caking evaluation was carried out by obtaining the weight ratio of the ball content of 5 mm or more in diameter, and the results are shown in Table 2.

From the experimental results of Table 2, compared to the detergent composition of the conventional countercurrent spray drying apparatus, not only the countercurrent spray drying apparatus was used, but also the detergent composition of the example using the binding coagulant had excellent cleaning power and apparent density. In particular, it was confirmed that the outstanding improvement in terms of caking, which is an evaluation standard of long-term storage stability, was found.

Claims (5)

10 to 45% by weight of the natural surfactant of formula (I), 10 to 40% by weight of sodium carbonate, 3 to 15% by weight of nonionic surfactant, 0.5 to 10% by weight of coagulant and 10 to 50% by weight of powder zeolite Wherein the natural surfactant powder has an apparent density of 0.5 to 1.4 g / cm 3, an average particle size of 250 to 700 μm, and has a particle size distribution of not more than 250 μm, having a particle size distribution of 25% by weight or less, RO-SO ₃ Na (Ⅰ) Wherein R represents C ₁₀ -C ₁₈ alkyl. The composition according to claim 1, wherein the nonionic surfactant is an alkyl ethoxylate of the following general formula (II), RO (CH ₂ CH ₂ O) _n H (II) R represents C ₁₀ -C ₁₀ alkyl and n represents an integer from 1 to 20. The composition of claim 1 wherein the coagulant is selected from polyethylene glycol and polypropylene glycol having a molecular weight of 1,000 to 25,000. The composition of claim 1 wherein the detergent has an apparent density of 0.6 to 1.3 g / cm 3. Sodium carbonate was added to the high-speed rotary granulator, and the liquid-bound component obtained by heating and dissolving the nonionic surfactant, the coagulant and the optical brightener in advance at 50 to 80 ° C. was spray-absorbed and uniformly stirred to granulate. A method for producing a low pollution concentrated powder detergent according to claim 1 by mixing powdered zeolite, a natural surfactant, and other additives in sequence with the particles.