JPH06136398A - Granular detergent composition - Google Patents

Abstract

PURPOSE:To obtain a granular detergent composition which has good solubility and is suited for the cleaning of clothes, etc. CONSTITUTION:The composition comprises 5-30% (a) surfactant which is either an anionic nonsoap surfactant or a nonionic surfactant, 3-15% (b) anionic soap surfactant, 5-30% (c) builder selected from polymeric builders which are maleic anhydride/acrylic acid copolymers having weight-average mol.wts. of 1,000-100,000 and salts thereof and chelate builders which are polycarboxylic acid salts including ethylenediaminetetraacetic acid salts and citric acid salts, and 20-50% (d) alkali builder selected from carbonic acid salts and silicic acid salts. It is produced from a powder containing 50% or more the ingredient (b), a powder of the ingredient (c), and a powder of the ingredient (d) by granulating the ingredients with a binder either after or during the mixing of the ingredients.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is a detergent having excellent detergency and solubility, which is useful for a continuous washer which is a characteristic washing machine of the industry in the laundry field for clothes, especially for linen. It relates to a composition.

[0002]

2. Description of the Related Art Linen suppliers generally wash continuous objects using a continuous washer in order to save labor. When using this method, a certain concentration is preset, usually about 5
The system is such that a 10% detergent solution is prepared and supplied into the washing machine at a predetermined stroke. Therefore, in order to quickly prepare this detergent stock solution, it is necessary that the detergent has good solubility.

[0003]

However, detergents for washers are generally powder-blended detergent components,
It is manufactured by spraying and granulating a nonionic surfactant, which is an active agent, onto a powder. Particularly in the industry where low foaming property is required, a large amount of soap is often used as an antifoaming agent, but it is added as soap particles in production. However, the detergent thus obtained has a drawback of poor solubility and it is difficult to quickly prepare a detergent stock solution. The present invention eliminates such drawbacks and provides a granular detergent composition having excellent solubility and suitable as a phosphorus-free detergent for laundry.

[0004]

Means for Solving the Problems As a result of intensive studies conducted by the present inventors in order to solve such a drawback, the presence of a specific chelate builder powder in the vicinity of soap particles results in good dissolution even at low temperatures. And found that
The present invention has been completed.

That is, the granular detergent composition of the present invention comprises (a) one or more surfactants selected from non-soap anionic surfactants and nonionic surfactants: 5 to 30 wt. % (B) Soap-based anionic surfactant: 3 to 15% by weight (c) Polymer builder which is a copolymer of maleic anhydride and acrylic acid and has a weight average molecular weight of 1,000 to 100,000, and Chelate builder selected from those salts and polyvalent carboxylates such as ethylenediamine tetraacetate and citrate: 5 to 30% by weight (d) Alkali builder selected from carbonate and silicate: 20 to 50% by weight Granulation with a binder after mixing the particles containing the above component (b) in a pure content of 50% by weight or more and the particulate component (c) and component (d), or while mixing. It is characterized by comprising.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The non-soap surfactant as the component (a) used in the present invention is an anionic surfactant or a nonionic surfactant, and typical examples thereof are as follows. 1) Linear alkylbenzene sulfonate having an alkyl group having an average carbon number of 10 to 16; 2) α-olefin sulfonate having an average carbon number of 10 to 20; 3) Alkyl group or alkenyl group having an average carbon number of 10 to 18 4) Alcohol ethoxylate having an alkyl group or an alkenyl group having an average carbon number of 9 to 20. 5) A polyoxyalkylene alkyl ether obtained by adding ethylene oxide and propyleneoxyside to an aliphatic alcohol having an alkyl group or an alkenyl group having an average carbon number of 9 to 20. 6) Fatty acid methyl ester (R ₁ COOCH ₃ ) having an alkyl group or an alkenyl group having an average carbon number of 8 to 22
Fatty acid methyl ethoxylate obtained by adding ethylene oxide to (the general formula is as shown in Chemical formula 1).

[0007]

Embedded image R ₁ CO (OCH ₂ CH ₂ ) nOCH ₃

In the present invention, the surfactant may be one kind or a mixture of two or more kinds. The content of the non-soap surfactant used in the present invention is 5 to 30 in the detergent composition.
%, Preferably 10 to 20% by weight. If the content of the non-soap-based surfactant is less than 5% by weight, excellent detergency cannot be obtained. On the other hand, if it exceeds 30% by weight, the fluidity of the detergent is poor, or foaming is remarkable when the detergent is dissolved. Therefore, the solubility of the soap particles slows down, which is not preferable.

The soap type anionic surfactant which is the component (b) of the present invention is a fatty acid salt having an alkyl group or an alkenyl group having an average carbon number of 8 to 22, and is usually an alkali metal salt such as sodium or potassium. is there. In the present invention, the fatty acid salt is added and granulated in the form of soap particles containing 50% or more of the fatty acid salt as a pure component. If the pure soap content in the soap particles (b) is less than 50% by weight, a predetermined bulk specific gravity cannot be obtained, which is not preferable.

The content of the component (b) used in the present invention is 3 to 15% by weight, preferably 5 to 1 in the detergent composition.
It is in the range of 0% by weight. Content of component (b) is 3% by weight
When the amount is less than the above range, foaming becomes remarkable during washing, which is not preferable.

The chelate builder used as the component (c) of the present invention is a copolymer of maleic anhydride and acrylic acid, and has a weight molecular weight of 1,000 to 100,000, preferably 40,000 to 80,000. 000 polymer builder and polyvalent carboxylates such as ethylenediaminetetraacetate and citrate. The copolymerization ratio of maleic anhydride / acrylic acid copolymer is 0.8 / 0.2 in molar ratio.
A range of 0.2 / 0.8 is suitable.

In the present invention, these chelate builders can be used as one kind or as a mixture of two or more kinds, and usually, they are added alone or as a mixture with other components as particles.

In the present invention, the content of the component (c) is in the range of 5 to 30% by weight, preferably 10 to 20% by weight in the detergent composition. When the content of the component (c) is less than 5% by weight, there is no effect of promoting the solubility, and when it exceeds 30% by weight, there is no further effect, which is not preferable.

In the present invention, the content of the component (d) is in the range of 20 to 50% by weight, preferably 30 to 40% by weight in the detergent composition. When the content of the component (d) is less than 20% by weight, a sufficient builder effect cannot be exhibited, while when it exceeds 50% by weight, the object to be washed causes alkali burn and is not preferable.

In the present invention, in addition to the above-mentioned essential components, if necessary, conventional components such as fluorescent agents, anti-soil redeposition agents such as carboxymethylcellulose, polyethylene glycol, polyvinylpyrrolidone, etc., enzymes, antifoaming agents, and mirabilite can be used. .

The granular detergent of the present invention is a powder mixture of the above-mentioned soap particles having a pure content of 50% or more and particulate (c) component and (d) component (both are typically powder). It is manufactured by adding a binder and granulating after or while mixing. At this time, the non-soap surfactant as the component (a) may be powder-mixed as particles, or may be added as a concentrated aqueous solution and used as a binder. In particular, nonionic surfactants or concentrated aqueous solutions thereof are suitable for use as binders.
When the component (a) is not used as a binder, water,
Other binders such as polyethylene glycol are used.
Further, part or all of the components (a) and (d) can be granulated in advance and used for powder mixing. The bulk specific gravity of the detergent obtained by granulation is usually 0.6 g / ml or more.

[0017]

According to the present invention, a non-soap surfactant,
A granular detergent composition exhibiting good solubility can be obtained by granulating a granular detergent with a specific amount of soap particles having a purity of 50% or more, a specific chelate builder in the particulate form, and an alkaline builder in the particulate form. It is suitable as a detergent for clothes, especially for laundry.

[0018]

[Examples] Powders of the respective components shown in Table 1 except for Softanol 50 were mixed with a ribbon mixer, and Softanol 50 was sprayed on the mixture to granulate the powder. Of granular detergent was produced. 30 kg of the granular detergent thus obtained was added to a stainless steel container containing 600 liters of tap water adjusted to 7 ° DH and 35 ° C. in advance and stirred for 20 minutes to confirm the dissolved state of the detergent, and evaluated according to the following criteria. . ◯: Almost no granular material remained ×: Granular material remained in 0.1% or more of the total detergent

[0019]

[Table 1] Sample No. 1 2 3 4 5 6 7 Composition (% by weight): Softanol 50 10 10 10 10 0 10 2 Powdered soap (60% pure soap) 7 6 5 5 20 5 10 Socalan CP7 10 5 0 5 0 0 1 EDTA-4Na 0 5 10 5 0 1 0 Light sodium carbonate 40 50 40 40 40 40 40 Glauber's salt Residual Residual Residual Residual Residual Fluorescent agent 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Esperase 4.0T 0.4 0.4 0.4 0.4 0.4 0.4 0.4 Moisture 2 2 2 2 2 2 2 Evaluation result: Solubility ○ ○ ○ ○ × × × Softanol 50: Nippon Shokubai Co., Ltd., nonionic surfactant Powder soap:% by weight of composition is described as pure amount Sokalan CP7: BASF Co., Ltd., maleic anhydride / acrylic acid copolymer (weight average molecular weight: 50,000) EDTA-4Na: ethylenediamine tetraacetic acid tetrasodium Esperase 4.0T: Novo Co., protease

Claims (1)

[Claims] 1. One or more surfactants selected from (a) a non-soap anionic surfactant and a nonionic surfactant: 5 to 30% by weight (b) a soap anionic Surfactant: 3 to 15% by weight (c) Polymer builder which is a copolymer of maleic anhydride and acrylic acid and has a weight average molecular weight of 1,000 to 100,000, and salts thereof, and ethylenediaminetetraacetic acid salt, Chelate builder selected from polyvalent carboxylic acid salts such as citrate: 5 to 30% by weight (d) Alkali builder selected from carbonate and silicate: 20 to 50% by weight, and containing the above component (b) A granular detergent set, characterized in that it is granulated with a binder after mixing particles having a pure content of 50% by weight or more with the particulate component (c) and component (d), or while mixing. Thing.