1. The concentrated bacteriostatic laundry detergent is characterized by comprising a surfactant, a chelating agent, a preservative, a bactericide and water, wherein the surfactant, the chelating agent, the preservative, the bactericide and the water are added in a ratio of 25-60: 0.1-0.5: 0.05-0.1: 0.4-2.5: 40-70.

2. The concentrated bacteriostatic laundry detergent according to claim 1, wherein the surfactant comprises nonionic surfactant and amphoteric surfactant.

3. The concentrated bacteriostatic laundry detergent according to claim 2, characterized in that the surfactant is composed of the following raw materials in parts by weight: 5-10 parts of cocamidopropyl betaine, 10-25 parts of decyl glucoside, 6-15 parts of cocamidopropyl amine oxide and 4-10 parts of cocamidodiethanol amine.

4. The concentrated bacteriostatic laundry detergent according to claim 1, wherein the bactericide comprises the following raw materials in parts by weight: 0.2-1.5 parts of polyhexamethylene biguanide and 0.2-1 part of didecyl dimethyl ammonium chloride.

5. The concentrated bacteriostatic laundry detergent according to claim 1, wherein the preservative is prepared from the following raw materials in parts by mass: 0.05-0.1 part of kasong.

6. The concentrated bacteriostatic laundry detergent according to claim 1, wherein the chelating agent is composed of the following raw materials in parts by weight: 0.1-0.5 parts of ethylenediaminetetraacetic acid tetrasodium salt.

7. The concentrated bacteriostatic laundry detergent according to claim 1, wherein the water is added in an amount of 40-70 parts.

8. The preparation method of the concentrated bacteriostatic laundry detergent as claimed in any one of claims 1 to 7, wherein the concentrated bacteriostatic laundry detergent is obtained by mixing water, a surfactant, a chelating agent, a preservative and a bactericide.

Background

With the improvement of living standard and the enhancement of environmental protection consciousness, the concentrated detergent is widely concerned, and the transformation requirements of enterprises under the situation of resource energy consumption aggravation and raw material cost rising are met. In addition, the antibacterial awareness of people is continuously strengthened, and the antibacterial laundry detergent can inhibit bacteria from proliferating on clothes, protect the clothes and reduce the possible harm to human bodies caused by bacterial proliferation. According to the specification of QB/T2850-2007 'antibacterial and bacteriostatic detergent', the laundry detergent product has a strong bacteriostatic action only when the laundry detergent product acts for 20min at a dilution concentration of 1:100 and the bacteriostatic rate is more than or equal to 90%. At such high dilution concentrations, the bacteriostatic effect of the product is greatly compromised. At present, no low-cost concentrated product on the market can simultaneously achieve the bacteriostasis rate of more than or equal to 90 percent on three bacteria of escherichia coli, staphylococcus aureus and candida albicans under the action concentration.

Because the bacteriostatic effect of the laundry detergent on the market is poor, the cost is bound to be improved in order to improve the bacteriostatic effect of the laundry detergent. The expensive cost of laundry detergent as a fast-selling consumer product directly affects its sales volume. Therefore, enterprises or collars are at risk and use dangerous bacteriostats such as triclosan, triclocarban and the like (related to hormone damage and fetal development problems), or establish an enterprise regulation bacteriostasis test method, and then only publicize that the bacteriostasis rate of one of the bacteria reaches more than 90%. That is to say, do not really solve the current poor problem of low-cost laundry detergent antibacterial effect.

In addition, the traditional laundry detergent mainly comprises anionic surfactant, and can be combined with cationic bactericide, so that the bactericidal efficiency is influenced, and how to select proper bactericide and surfactant is the focus of research in the field. The nonionic surfactant system has low irritation to skin, and can clean stains while having certain softening and antistatic properties. However, the detergent has some challenges to achieve the above 1% of the three kinds of dirt-removing cloth specified in GB/T13174-2008, and therefore, the detergent is often used as a silk wool detergent.

Therefore, the problem to be solved in the field is how to provide the concentrated bacteriostatic laundry detergent and the preparation method thereof, reduce the cost of the concentrated bacteriostatic laundry detergent, and improve the bacteriostatic rate of escherichia coli, staphylococcus aureus and candida albicans.

Disclosure of Invention

In view of the above, the invention provides a concentrated bacteriostatic laundry detergent and a preparation method thereof, and the concentrated bacteriostatic laundry detergent does not need to be added with substances which have hidden danger to human safety, has cheap and easily-obtained production raw materials, is simple in preparation method, and is easy for industrial production.

In order to achieve the purpose, the invention adopts the following technical scheme:

a concentrated bacteriostatic laundry detergent comprises a surfactant, a chelating agent, a preservative, a bactericide and water, wherein the surfactant, the chelating agent, the preservative, the bactericide and the water are added according to a ratio of 25-60: 0.1-0.5: 0.05-0.1: 0.4-2.5: 40-70.

Preferably, the surfactants are nonionic surfactants and amphoteric surfactants.

Preferably, the surfactant is composed of the following raw materials in parts by mass: 5-10 parts of cocamidopropyl betaine, 10-25 parts of decyl glucoside, 6-15 parts of cocamidopropyl amine oxide and 4-10 parts of cocamidodiethanol amine.

Preferably, the bactericide comprises the following raw materials in parts by weight: 0.2-1.5 parts of polyhexamethylene biguanide and 0.2-1 part of didecyl dimethyl ammonium chloride.

Preferably, the preservative comprises the following raw materials in parts by mass: 0.05-0.1 part of kasong.

Preferably, the chelating agent is composed of the following raw materials in parts by mass: 0.1-0.5 parts of ethylenediaminetetraacetic acid tetrasodium salt.

Preferably, the amount of water added is 40 to 70 parts.

The invention also aims to provide a preparation method of the concentrated bacteriostatic laundry detergent, which comprises the following steps: and sequentially adding water, a surfactant, a chelating agent, a preservative and a bactericide, and stirring to obtain the concentrated bacteriostatic laundry detergent.

According to the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. traditional laundry detergents are based on anionic surfactants and can bind to cationic disinfectants, which can affect the disinfection efficiency. The disinfectant does not contain anionic surfactant, has good compatibility with the disinfectant, has no mutual interference effect, has excellent disinfectant effect, and can reduce the stimulation to hands;

2. under the action condition specified by QB/T2850-2007 standard, the laundry detergent disclosed by the invention can simultaneously achieve the bacteriostatic rate of over 90% on escherichia coli, staphylococcus aureus and candida albicans, and has a good bacteriostatic effect.

3. The laundry detergent disclosed by the invention is a concentrated formula, is simple in preparation process, can save a large amount of manpower and material resources in production, reduces the waste of packing materials, reduces the transportation cost, and can save water consumption in the using process.

Detailed Description

The invention provides a concentrated bacteriostatic laundry detergent which comprises a surfactant, a chelating agent, a preservative, a bactericide and water.

In the present invention, the surfactant is a nonionic surfactant and a zwitterionic surfactant.

In the invention, the surfactant is composed of the following raw materials in parts by mass: 5-10 parts of cocamidopropyl betaine, 10-25 parts of decyl glucoside, 6-15 parts of cocamidopropyl amine oxide and 4-10 parts of cocamidodiethanol amine; preferably 5-8 parts of cocamidopropyl betaine, 18-22 parts of decyl glucoside, 10-14 parts of cocamidopropyl amine oxide and 3-8 parts of cocamidodiethanol amine; further preferred are 6 parts of cocamidopropyl betaine, 15 parts of decyl glucoside, 13 parts of cocamidopropyl amine oxide, and 6 parts of cocamidodiethanol amine.

In the invention, the bactericide comprises the following raw materials in parts by weight: 0.2-1.5 parts of polyhexamethylene biguanide and 0.2-1 part of didecyl dimethyl ammonium chloride; preferably 0.6-1 part of polyhexamethylene biguanide and 0.3-0.5 part of didecyl dimethyl ammonium chloride; further preferably, the amount of the polyhexamethylene biguanide is 0.8 part and the amount of didecyldimethylammonium chloride is 0.4 part.

In the invention, the preservative comprises the following raw materials in parts by mass: 0.05-0.1 part of kasong; preferably 0.08 parts.

In the invention, the chelating agent comprises the following raw materials in parts by weight: 0.1-0.5 parts of tetrasodium ethylene diamine tetraacetate; preferably 0.2 parts.

In the present invention, the amount of water added is 40 to 70 parts, preferably 55 to 60 parts.

The invention also provides a preparation method of the concentrated bacteriostatic laundry detergent, which comprises the following specific steps: and sequentially adding water, a surfactant, a chelating agent, a preservative and a bactericide, and stirring to obtain the concentrated bacteriostatic laundry detergent.

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A concentrated bacteriostatic laundry detergent comprises the following formula: 6 parts of cocamidopropyl betaine, 15 parts of decyl glucoside, 13 parts of cocamidopropyl amine oxide, 6 parts of cocamidodiethanolamine, 0.2 part of tetrasodium ethylenediamine tetraacetate, 0.08 part of kason, 0.8 part of polyhexamethylene biguanide, 0.4 part of didecyldimethylammonium chloride and 58.52 parts of water.

The operation process comprises the following steps: mixing water, cocamidopropyl betaine, decyl glucoside, cocamidopropyl amine oxide, cocamidodiethanol amine, tetrasodium ethylenediamine tetraacetate and glycerin, stirring, adding polyhexamethylene biguanide and didecyldimethylammonium chloride, and stirring to obtain uniform mixture without lumps.

Example 2

A concentrated bacteriostatic laundry detergent comprises the following formula: 10 parts of cocamidopropyl betaine, 10 parts of decyl glucoside, 6 parts of cocamidopropyl amine oxide, 10 parts of cocamidodiethanolamine, 0.5 part of tetrasodium ethylenediamine tetraacetate, 0.05 part of cason, 0.2 part of polyhexamethylene biguanide, 1 part of didecyldimethylammonium chloride and 62.25 parts of water.

The operation process comprises the following steps: mixing water, cocamidopropyl betaine, decyl glucoside, cocamidopropyl amine oxide, cocamidodiethanol amine, tetrasodium ethylenediamine tetraacetate and glycerin, stirring, adding polyhexamethylene biguanide and didecyldimethylammonium chloride, and stirring to obtain uniform mixture without lumps.

Example 3

A concentrated bacteriostatic laundry detergent comprises the following formula: 5 parts of cocamidopropyl betaine, 25 parts of decyl glucoside, 15 parts of cocamidopropyl amine oxide, 4 parts of cocamidodiethanol amine, 0.1 part of tetrasodium ethylenediamine tetraacetate, 0.1 part of kason, 1.5 parts of polyhexamethylene biguanide, 0.2 part of didecyl dimethyl ammonium chloride and 49.2 parts of water.

The operation process comprises the following steps: mixing water, cocamidopropyl betaine, decyl glucoside, cocamidopropyl amine oxide, cocamidodiethanol amine, tetrasodium ethylenediamine tetraacetate and glycerin, stirring, adding polyhexamethylene biguanide and didecyldimethylammonium chloride, and stirring to obtain uniform mixture without lumps.

Experimental example 1

The concentrated bacteriostatic laundry detergent prepared in the embodiments 1-3 of the invention is used for detecting the bacteriostatic rate of escherichia coli, staphylococcus aureus and candida albicans according to the detection method specified in QB/T2850-2007, and the detection results are shown in Table 1.

TABLE 1

As can be obtained from the table 1, the bacteriostatic laundry detergent of the invention has over 90% of bacteriostatic rate on Escherichia coli, Staphylococcus aureus and Candida albicans, and has excellent bacteriostatic effect.

Experimental example 2

The decontamination ratio of the concentrated bacteriostatic laundry detergent prepared in example 1 is detected according to GB/T13174-2008, and the detection result shows that the decontamination ratio of the concentrated bacteriostatic laundry detergent prepared in the invention to three kinds of dirty cloth, namely carbon black, protein and sebum, is greater than 1, and the test result is shown in Table 2.

TABLE 2

Comparative example 1

A concentrated bacteriostatic laundry detergent comprises 21 parts of cocamidopropyl betaine and 19 parts of cocamidopropyl amine oxide as surfactants, the total mass of the surfactants added in the comparative example is equal to that in example 1, and the content of other raw materials and the preparation method are the same as those in example 1. The results are shown in Table 3 (detection according to standard QB/T2850-2007).

TABLE 3

	Escherichia coli	Staphylococcus aureus	Candida albicans
				Before treatment, cfu/ml	3.6×104	3.8×104	2.4×104
After treatment, cfu/ml	4900	2700	5300
				Bacteriostasis rate of%	86.4	92.9	77.9

As can be seen from table 3, the bacteriostatic rate was not ideal when only the amphoteric surfactant was present in the protocol.

Comparative example 2

A concentrated bacteriostatic laundry detergent comprises 21 parts of decyl glucoside and 19 parts of cocamide diethanolamine as surfactants, the total mass of the surfactants added in the comparative example is equal to that in example 1, and the content of other raw materials and the preparation method are the same as those in example 1. The results are shown in Table 4 (detection according to standard QB/T2850-2007).

TABLE 4

	Escherichia coli	Staphylococcus aureus	Candida albicans
				Before treatment, cfu/ml	3.4×104	4.0×104	2.5×104
After treatment, cfu/ml	7200	2700	5200
				Bacteriostasis rate of%	78.82	93.3	79.2

As can be seen from table 4, the bacteriostatic rate was not ideal when only the nonionic surfactant was present in the protocol.

Comparative example 3

A concentrated bacteriostatic laundry detergent comprises 0.8 part of polyhexamethylene biguanide as a bacteriostatic agent and 0.4 part of polyurethane microemulsion dispersion, the total mass of the bacteriostatic agent added in the comparative example is equal to that in example 1, and the content and the preparation method of the rest raw materials are the same as those in example 1. The results are shown in Table 5 (detection according to standard QB/T2850-2007).

TABLE 5

	Escherichia coli	Staphylococcus aureus	Candida albicans
				Before treatment, cfu/ml	4.6×104	4.3×104	3.8×104
After treatment, cfu/ml	13064	9081	27284
				Bacteriostasis rate of%	71.6	78.8	28.2

As can be seen from table 5, after the bacteriostatic agent is replaced, the bacteriostatic effect is significantly reduced, and the invention has unique compatibility, which indicates that good effect can be achieved only by the scheme disclosed by the invention.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.