Antistatic derusting neutralizing acid agent and preparation method thereof

Abstract

The invention provides an antistatic derusting neutralizing acid agent and a preparation method thereof, and belongs to the technical field of commercial cleaning. The antistatic derusting neutralizing acid agent provided by the invention comprises the following components in percentage by mass: 2.0-6.0% of an antistatic agent which is Gemini-type quaternary ammonium salt, 2.0-6.0% of an anti-rust agent, 2.0-6.0% of a neutralizing agent and the balance of water. 15.5-41.0% of a composite acid agent, wherein the composite acid agent is methanesulfonic acid, glycollic acid and ammonium bifluoride; 1.0 to 5.0 percent of chelating agent, wherein the chelating agent is a strong acid resistant chelating agent; 0.5 to 2.0 percent of corrosion inhibitor; and the balance of water. The antistatic derusting neutralizing acid agent provided by the invention has excellent antistatic performance, and can efficiently improve the antistatic performance of linen at low cost when being used in a neutralizing treatment stage of the linen.

Description

Technical Field

[0001] The invention relates to the technical field of commercial cleaning, and in particular to an antistatic rust removal neutralizing acid agent and a preparation method thereof. Background Art

[0002] Hotel bedding is in the closest contact with guests, so the bed sheets, quilt covers and pillowcases of star-rated hotels are generally made of pure cotton. Pure cotton is soft, breathable, heat-resistant and alkali-resistant. Many fast-food chain hotels usually use polyester-cotton blended linens, which are second only to pure cotton in comfort. Polyester-cotton blended linens are a common blend of synthetic fibers and natural fibers, combining the durability of polyester and the softness of cotton. The advantages of polyester-cotton blended linens are good wear resistance and wrinkle resistance, not easy to pilling, and good durability. The disadvantages are that the skin feel is slightly worse than pure cotton and the breathability is relatively poor. Since the auxiliary materials and lining materials of bedding (mostly referring to bed covers) are not in direct contact with the human body, polyester fabrics are usually used. Polyester bed covers have good wear resistance, strong wrinkle resistance, and are relatively low in price. Polyester bed covers are easy to clean and maintain, and are suitable for hotel environments that require frequent washing.

[0003] Although pure cotton fiber has the characteristics of strong moisture absorption and good insulation in theory, pure cotton fabrics will also generate static electricity when rubbed. Especially under certain conditions, such as dry environment, friction with other materials, etc. Pure cotton fabrics will also generate static electricity. Pure cotton linens and polyester linens as auxiliary materials and linings will inevitably generate friction, and in the dry environment of winter, static electricity is easily generated.

[0004] The main material of hotel tablecloth is polyester, which is washable, shrink-proof, elastic, not easy to deform, high temperature resistant, strong oxidant resistant and easy to iron, so it has become the mainstream of washable tablecloth. However, for polyester tablecloth, it is more likely to generate static electricity after being ironed in an ironing machine at 150-180℃, which will have a negative impact on the staff who fold and pack the tablecloth due to the release of static electricity.

[0005] At present, the washing process of hotel bedding, tablecloths and other linens involves multiple steps, such as pre-washing, main washing, bleaching, rinsing, neutralization treatment, high desorption or pressing, etc. How to efficiently and low-cost make the washed bedding and tablecloths have excellent antistatic properties is a technical problem that urgently needs to be solved in this field. Summary of the invention

[0006] The object of the present invention is to provide an antistatic rust-removing neutralizing acid agent and a preparation method thereof. The antistatic rust-removing neutralizing acid agent provided by the present invention has excellent antistatic performance. When used in the neutralization treatment stage of linens, the antistatic performance of linens can be improved efficiently and at low cost.

[0007] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0008] The present invention provides an antistatic rust removal and acid neutralizing agent, which comprises the following components by weight percentage:

[0009] 2.0-6.0% antistatic agent, wherein the antistatic agent is a Gemini type quaternary ammonium salt;

[0010] 15.5-41.0% of a composite acid, wherein the composite acid is methanesulfonic acid, glycolic acid and ammonium bifluoride;

[0011] 1.0-5.0% of a chelating agent, wherein the chelating agent is a strong acid-resistant chelating agent;

[0012] Corrosion inhibitor 0.5~2.0%;

[0013] The balance is water.

[0014] Preferably, the cation of the antistatic agent has a structure shown in Formula I:

[0015]

[0016] In Formula I, R 1 C 12 ~C 16 of alkyl.

[0017] Preferably, the antistatic agent comprises ethylenebis(dodecyldimethylammonium chloride) and / or ethylenebis(hexadecyldimethylammonium chloride).

[0018] Preferably, the mass ratio of methanesulfonic acid, glycolic acid and ammonium bifluoride is 10.0-25.0:5.0-14.0:0.5-2.0.

[0019] Preferably, the chelating agent comprises tetrasodium dicarboxymethyl glutamate.

[0020] Preferably, the corrosion inhibitor comprises heptadecenylamineethylimidazoline quaternary ammonium.

[0021] The present invention provides a method for preparing the antistatic rust removal neutralizing acid agent described in the above technical solution, comprising the following steps:

[0022] The antistatic agent, the composite acid agent, the chelating agent, the corrosion inhibitor and water are mixed to obtain the antistatic rust removal neutralizing acid agent.

[0023] Preferably, the mixing comprises: adding an antistatic agent, a composite acid agent, a chelating agent and a corrosion inhibitor to the water in sequence.

[0024] The present invention provides the use of the antistatic rust-removing neutralizing acid agent described in the above technical solution or the antistatic rust-removing neutralizing acid agent prepared by the preparation method described in the above technical solution in neutralization treatment of linens.

[0025] Preferably, the linens are hotel bedding linens and / or tablecloth linens, and the material of the linens includes pure cotton and / or polyester.

[0026] The present invention provides an antistatic rust removal neutralizing acid agent, which comprises the following components by mass percentage: 2.0-6.0% antistatic agent, wherein the antistatic agent is a Gemini quaternary ammonium salt; 15.5-41.0% composite acid agent, wherein the composite acid agent is methanesulfonic acid, glycolic acid and ammonium bifluoride; 1.0-5.0% chelating agent, wherein the chelating agent is a strong acid resistant chelating agent; 0.5-2.0% corrosion inhibitor; and the balance is water. The present invention adopts antistatic agent, composite acid agent, chelating agent and corrosion inhibitor to compound to obtain antistatic rust removal neutralizing acid agent, which is used in the neutralization treatment stage of linen. On the one hand, it can be used to neutralize alkaline substances remaining in the main washing process, and chelate common metal ion deposits such as iron, calcium, magnesium, etc. on the linen, and on the other hand, it can also significantly improve the antistatic performance of the linen. The present invention introduces the antistatic agent in the neutralization treatment stage, which can avoid the problem that the antistatic agent introduced in the main washing stage is easily lost in large quantities due to multiple rinsing, thereby reducing the antistatic effect and increasing the cost. In addition, the composite acid agent used in the present invention has strong acidity and low corrosivity, and the corrosion inhibitor is introduced at the same time, so that the antistatic rust removal and neutralizing acid agent has excellent corrosion inhibition performance and can reduce the corrosiveness to the washing equipment.

[0027] Furthermore, the antistatic agent used in the present invention is an acidic substance, which also has a certain weak neutralization ability and good stability. DETAILED DESCRIPTION

[0028] The present invention provides an antistatic rust removal and acid neutralizing agent, which comprises the following components by weight percentage:

[0029] 2.0-6.0% antistatic agent, wherein the antistatic agent is a Gemini type quaternary ammonium salt;

[0030] 15.5-41.0% of a composite acid, wherein the composite acid is methanesulfonic acid, glycolic acid and ammonium bifluoride;

[0031] 1.0-5.0% of a chelating agent, wherein the chelating agent is a strong acid-resistant chelating agent;

[0032] Corrosion inhibitor 0.5~2.0%;

[0033] The balance is water.

[0034] It is inevitable that pure cotton linens and polyester linens used as auxiliary materials and linings will produce friction, and the dry environment in winter will easily generate static electricity. This phenomenon is mainly caused by the difference in charge on the surfaces of the two materials. When the two materials rub against each other, due to the potential difference, the charge on the polyester will be transferred to the pure cotton, thereby generating static electricity. At present, in order to ensure that hotel bedding and tablecloths and other linens can be thoroughly cleaned and properly cared for, the linen washing process usually involves multiple steps, such as pre-washing, main washing, bleaching, rinsing, neutralization treatment, high desorption or pressing, etc. In the main washing stage, main detergents and synergistic alkaline agents are usually added to play a role in decontamination. The main detergent is usually alkaline. Although it has been rinsed many times, it cannot be guaranteed that there is no alkaline component. The presence of alkaline components will have a certain impact on the appearance and feel of the washed goods, and may even have an adverse effect on human skin and health. Therefore, neutralization treatment is usually required to neutralize the residual alkaline components and balance the pH value of the linens. If an antistatic agent is added in the main wash stage, since the washing process requires multiple rinsings, a large amount of antistatic agent will be lost, resulting in reduced effect or increased cost. The present invention adds an antistatic agent to the neutralizing acid agent, that is, introduces the antistatic agent in the neutralization treatment stage of the linen, which can avoid the problem that the antistatic agent introduced in the main wash stage is easy to be lost in large quantities due to multiple rinsings, thereby causing a reduction in the antistatic effect and an increase in cost. In addition, the composite acid agent used in the present invention is highly acidic and has low corrosiveness. At the same time, a corrosion inhibitor is introduced, so that the antistatic rust-removing neutralizing acid agent has excellent corrosion inhibition performance, which can reduce the corrosiveness to the washing equipment. The antistatic rust-removing neutralizing acid agent provided by the present invention is described in detail below.

[0035] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known to those skilled in the art or are prepared by methods well known to those skilled in the art.

[0036] In terms of mass percentage, the antistatic rust removal and neutralizing acid agent of the present invention includes 2.0-6.0% of antistatic agent, specifically 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5% or 6.0%. In the present invention, the antistatic agent is a Gemini quaternary ammonium salt; as an embodiment of the present invention, the cation of the antistatic agent can have a structure shown in Formula I:

[0037]

[0038] In Formula I, R 1 C 12 ~C 16 of alkyl.

[0039] As an embodiment of the present invention, the R 1 Can be C 12 ~C 16A straight chain alkyl group, specifically -C 12 H 25 or -C 16 H 33 As an embodiment of the present invention, the anion of the antistatic agent may be a halogen anion, specifically Cl - As an embodiment of the present invention, the antistatic agent may specifically have a structure as shown in Formula II:

[0040]

[0041] As an embodiment of the present invention, the antistatic agent may include ethylene bis(dodecyl dimethyl ammonium chloride) and / or ethylene bis(hexadecyl dimethyl ammonium chloride), that is, it may be ethylene bis(dodecyl dimethyl ammonium chloride), it may be ethylene bis(hexadecyl dimethyl ammonium chloride), it may be ethylene bis(dodecyl dimethyl ammonium chloride) and ethylene bis(hexadecyl dimethyl ammonium chloride); when the antistatic agent is ethylene bis(dodecyl dimethyl ammonium chloride) and ethylene bis(hexadecyl dimethyl ammonium chloride), the mass ratio of ethylene bis(dodecyl dimethyl ammonium chloride) and ethylene bis(hexadecyl dimethyl ammonium chloride) may be 1:0.5 to 1.5, specifically 1:1. In an embodiment of the present invention, the ethylene bis (dodecyl dimethyl ammonium chloride) and the ethylene bis (hexadecyl dimethyl ammonium chloride) are both commercially available commodities, and the manufacturer is Zhengzhou Yihe Fine Chemicals Co., Ltd.; wherein the purity of the ethylene bis (dodecyl dimethyl ammonium chloride) can be 50wt%, and the purity of the ethylene bis (hexadecyl dimethyl ammonium chloride) can be 50wt%. In the embodiment of the present invention, the above-mentioned antistatic agent is adopted, which is a gemini quaternary ammonium salt, which is connected by two lipophilic groups and two hydrophilic groups through a connecting base, and this structure enables it to remain stable under strong acid conditions, and in the neutralization process of linen, linen can be made to have antistatic function. At the same time, the antistatic agent used in the embodiment of the present invention is an acidic substance, has a certain weak neutralization ability, and has a strong synergistic effect and high temperature resistance, low temperature performance, can maintain good stability and excellent interfacial activity under high temperature and low temperature environments, is less affected by pH, and can still maintain good high temperature resistance, low temperature performance under extreme acidic environmental conditions, and has good stability. The common typical quaternary ammonium salt hexadecyltrimethylammonium chloride is easily affected by various factors and decomposes and inactivates at room temperature, and has poor high temperature resistance under extreme acidic conditions.

[0042] According to the percentage by mass, the antistatic rust removal neutralizing acid agent of the present invention includes 15.5-41.0% of the composite acid agent, which can be specifically 15.5%, 18.5%, 20.8%, 23.5%, 25.0%, 28.5%, 30.5%, 32.5%, 33.8%, 35.5%, 37.5%, 39.5% or 41.0%. The composite acid agent of the present invention is methanesulfonic acid, glycolic acid and ammonium bifluoride; as an embodiment of the present invention, the mass ratio of methanesulfonic acid, glycolic acid and ammonium bifluoride can be 10.0-25.0:5.0-14.0:0.5-2.0, further can be 12.0-20.0:8.0-12.0:0.8-1.8, and further can be 15.0-18.0:9.0-11.0:1.0-1.5. In the embodiment of the present invention, the methanesulfonic acid, glycolic acid and ammonium bifluoride are all commercially available commodities; wherein the manufacturer of the methanesulfonic acid is Hubei Xingchi Technology Co., Ltd., and the purity of the methanesulfonic acid can be 70wt%; the manufacturer of the glycolic acid is Taixing City Woteer Chemical Co., Ltd., and the purity of the glycolic acid can be 70wt%; the manufacturer of the ammonium bifluoride is Hubei Xinrunde Chemical Co., Ltd., and the purity of the ammonium bifluoride is ≥99wt%. In the present invention, the composite acid agent is used to neutralize the alkaline substance added in the main washing stage. The present invention adopts methanesulfonic acid, glycolic acid and ammonium bifluoride compound, wherein methanesulfonic acid is a strong acid, and its scale dissolving ability (such as calcium carbonate scale) is several to ten times higher than that of general organic acids (formic acid, citric acid, etc.), and its corrosiveness to steel is much smaller than that of inorganic strong acids (sulfuric acid, hydrochloric acid, etc.), which may be due to the ionization of the methyl group in the methanesulfonic acid molecule to the sulfonic acid group to produce a certain steric hindrance effect, thereby reducing its corrosiveness to materials such as metals. As the main neutralizing acid in the present invention, methanesulfonic acid can effectively neutralize the alkaline substances added in the main washing stage of the linen, and react to form water-soluble salts; in addition, methanesulfonic acid is also an effective rust remover; in addition to having alkali neutralization ability, glycolic acid also has a reduction whitening effect on the linen; in addition to having alkali neutralization ability, ammonium bifluoride also has excellent rust removal and fading ability on the linen. The three acids in the present invention are compounded to cooperate with each other and have good neutralization, whitening and rust removal functions.

[0043] According to the percentage by mass, the antistatic rust removal neutralizing acid agent of the present invention includes 1.0-5.0% of chelating agent, which can be specifically 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5% or 5.0%. In the present invention, the chelating agent is a strong acid resistant chelating agent; as an embodiment of the present invention, the chelating agent can include dicarboxymethyl glutamate tetrasodium. In the embodiment of the present invention, the dicarboxymethyl glutamate tetrasodium is a commercially available product, the manufacturer is Nouryon, and the purity of the dicarboxymethyl glutamate tetrasodium can be 47wt%. The above-mentioned type of chelating agent is used in the embodiment of the present invention, which has extremely strong acid stability. In addition to chelating metal ions such as calcium and magnesium in water during neutralization, it can also dissolve dirt such as calcium carbonate and basic magnesium carbonate on linens, and has a good effect in improving cleaning effect, preventing the formation of metal deposits, and assisting rust removal.

[0044] According to the percentage by mass, the antistatic rust removal and acid neutralizing agent of the present invention includes 0.5-2.0% of corrosion inhibitor, which can be specifically 0.5%, 0.8%, 1.0%, 1.2%, 1.5%, 1.8% or 2.0%. As an embodiment of the present invention, the corrosion inhibitor can include 17-enylamine ethyl imidazoline quaternary ammonium. In an embodiment of the present invention, the 17-enylamine ethyl imidazoline quaternary ammonium is a commercially available product, and the manufacturer is Shandong Huling New Materials Co., Ltd., and the purity of the 17-enylamine ethyl imidazoline quaternary ammonium can be 70wt%. The above-mentioned type of corrosion inhibitor is used in the embodiment of the present invention, which has excellent corrosion inhibition performance, and it can be adsorbed on the metal surface to form a strict and uniform protective film.

[0045] The antistatic rust removal and neutralizing acid agent of the present invention comprises residual water, and the water can specifically be process soft water.

[0046] The present invention provides a method for preparing the antistatic rust removal neutralizing acid agent described in the above technical solution, comprising the following steps:

[0047] The antistatic agent, the composite acid agent, the chelating agent, the corrosion inhibitor and water are mixed to obtain the antistatic rust removal neutralizing acid agent.

[0048] As an embodiment of the present invention, the mixing may include: adding an antistatic agent, a composite acid agent, a chelating agent and a corrosion inhibitor to the water in sequence. As an embodiment of the present invention, the temperature of the water may be 35 to 45°C, specifically 40°C; the mixing may be performed under stirring conditions, and the stirring speed may be 50 to 70 rpm, specifically 60 rpm; after the addition of the corrosion inhibitor is completed, preferably stirring is continued for 20 to 30 minutes, and then the antistatic rust removal neutralizing acid agent is obtained by filtering and filling.

[0049] The present invention provides the use of the antistatic rust-removing neutralizing acid agent described in the above technical solution or the antistatic rust-removing neutralizing acid agent prepared by the preparation method described in the above technical solution in neutralization treatment of linens. As an embodiment of the present invention, the linens may include hotel bedding linens and / or tablecloth linens, and the bedding linens may include one or more of bed sheets, quilt covers, pillowcases and fitted sheets; the material of the linens may include pure cotton and / or polyester. The present invention does not specifically limit the amount of the antistatic rust-removing neutralizing acid agent used in the application process, and the amount familiar to those skilled in the art may be used.

[0050] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The sources of some raw materials in the following examples and comparative examples are as follows:

[0052] The antistatic agent is ethylenebis(dodecyldimethylammonium chloride) (purity of 50wt%) or ethylenebis(hexadecyldimethylammonium chloride) (purity of 50wt%), produced by Zhengzhou Yihe Fine Chemicals Co., Ltd.

[0053] Methanesulfonic acid (CH 3 SO 3 H; purity 70wt%), manufacturer: Hubei Xingchi Technology Co., Ltd.;

[0054] Glycolic acid (HOCH 2 COOH; purity 70wt%), manufacturer: Taixing Water Chemical Co., Ltd.;

[0055] Ammonium bifluoride (NH 4 HF 2 ; Purity ≥ 99wt%), manufacturer: Hubei Xinrunde Chemical Co., Ltd.;

[0056] The chelating agent is tetrasodium dicarboxymethyl glutamate (C 9 H 9 NNa 4 O 8 ; Purity 47wt%), manufacturer: Nouryon;

[0057] The corrosion inhibitor is heptadecanylamine ethyl imidazoline quaternary ammonium salt (C 22 H 43 N 3 ·C 4 H 10 O 4S; purity 70wt%), manufacturer: Shandong Huling New Materials Co., Ltd.

[0058] Examples 1 to 6

[0059] The specific component types and component mass contents of the antistatic rust removal and acid neutralizing agents in Examples 1 to 6 are shown in Table 1:

[0060] Table 1 Antistatic rust removal and acid neutralization agent formulations in Examples 1 to 6

[0061]

[0062] The preparation method of the antistatic rust removal and acid neutralizing agent in Examples 1 to 6 comprises the following steps:

[0063] (1) Adding process soft water in a stirring tank according to the formula ratio, heating the water temperature to 40° C., then adding ethylene bis(dodecyldimethylammonium chloride) and / or ethylene bis(hexadecyldimethylammonium chloride) into the stirring tank according to the formula, and stirring at a stirring rate of 60 rpm until completely dissolved;

[0064] (2) The stirring speed was controlled at 60 rpm, and methanesulfonic acid was added into the stirring tank according to the recipe;

[0065] (3) The stirring speed was controlled at 60 rpm, and glycolic acid was added into the stirring tank according to the recipe;

[0066] (4) The stirring speed was controlled at 60 rpm, and ammonium bifluoride was added into the stirring tank according to the formula;

[0067] (5) The stirring speed was controlled at 60 rpm, and tetrasodium dicarboxymethyl glutamate was added into the stirring tank according to the recipe;

[0068] (6) The stirring speed is controlled at 60 rpm, and heptadecanedilamineethylimidazoline quaternary ammonium salt is added into the stirring tank according to the formula, and then the stirring speed is maintained at 60 rpm for 30 minutes, and then filtered and canned.

[0069] Comparative Example 1

[0070] The method of Example 1 was used for operation, except that the antistatic agent ethylene bis (dodecyl dimethyl ammonium chloride) was not added in this comparative example, the other components remained unchanged, and the missing part was supplemented with water to 100%.

[0071] Comparative Example 2

[0072] The method of Example 1 is used for operation, except that in this comparative example, the antistatic agent ethylene bis (dodecyl dimethyl ammonium chloride) is replaced by hexadecyl trimethyl ammonium chloride (purity of 70wt%, the remaining 30wt% is water) with the same effective content, and the other components remain unchanged, and the missing part is supplemented to 100% with water.

[0073] Comparative Example 3

[0074] The method of Example 1 was used, except that in this comparative example, the chelating agent dicarboxymethyl glutamate tetrasodium was replaced by ethylenediaminetetraacetic acid (purity of 99wt%, the remaining 1wt% was water) of the same equivalent content, the other components remained unchanged, and the missing parts were supplemented to 100% with water.

[0075] Comparative Example 4

[0076] The method of Example 1 was used for operation, except that the corrosion inhibitor heptadecanylamineethylimidazoline quaternary ammonium salt was not added in this comparative example, the other components remained unchanged, and the missing part was supplemented with water to 100%.

[0077] Comparative Example 5

[0078] The method of Example 1 is used for operation, except that in this comparative example, methanesulfonic acid is replaced by sulfuric acid of the same equivalent content (purity is 96wt%, and the remaining 4wt% is water), and the corrosion inhibitor heptadecanylamine ethyl imidazoline quaternary ammonium salt is not added, and the other components remain unchanged, and the missing part is supplemented to 100% with water.

[0079] Comparative Example 6

[0080] The method of Example 1 was used for operation, except that in this comparative example, methanesulfonic acid was replaced by sulfuric acid of the same equivalent content (purity of 96wt%, the remaining 4wt% was water), the other components remained unchanged, and the missing parts were supplemented with water to 100%.

[0081] Comparative Example 7

[0082] The method of Example 1 was used for operation, except that in this comparative example, methanesulfonic acid was replaced by citric acid of the same equivalent content (purity of 99.5 wt %), the other components remained unchanged, and the missing parts were supplemented to 100% with water.

[0083] Comparative Example 8

[0084] The method of Example 1 was used for operation, except that in this comparative example, ammonium bifluoride was replaced by methanesulfonic acid of the same equivalent content (i.e., only methanesulfonic acid and glycolic acid were used as composite acid agents), the other components remained unchanged, and the excess was deducted from the water.

[0085] Test Example 1: Stability Performance Evaluation

[0086] The heat resistance and cold resistance stability of the products prepared in Examples 1 to 6 and Comparative Examples 1 to 7 were tested by the method specified in 4.3 of "QB / T 4528-2013". The results are shown in Table 2.

[0087] Table 2 Stability performance test results

[0088] Sample source Heat stability Cold resistance and stability Example 1 Stablize Stablize Example 2 Stablize Stablize Example 3 Stablize Stablize Example 4 Stablize Stablize Example 5 Stablize Stablize Example 6 Stablize Stablize Comparative Example 1 Stablize Stablize Comparative Example 2 Layering Stablize Comparative Example 3 Layering Layering Comparative Example 4 Stablize Stablize Comparative Example 5 Stablize Stablize Comparative Example 6 Stablize Stablize Comparative Example 7 Stablize Stablize

[0089] As can be seen from Table 2, the products prepared in Examples 1 to 6 are stable in both heat stability and cold stability tests. This shows that ethylenebis(dodecyldimethylammonium chloride) and ethylenebis(hexadecyldimethylammonium chloride) can both exist stably in a strong acid system. In Comparative Example 1, no antistatic agent was added, and the formulation system was also able to exist stably. The results of Comparative Example 2 show that, under the condition that the actual effective content of hexadecyltrimethylammonium chloride is 1%, although the cold stability is good, the heat stability cannot meet the requirements. In Comparative Example 3, the chelating agent is ethylenediaminetetraacetic acid, which has a reduced solubility under strong acid conditions, resulting in precipitation, and the stability cannot meet the requirements. In Comparative Examples 4 to 7, no corrosion inhibitor was added and / or other acids (sulfuric acid or citric acid) were used instead of methanesulfonic acid, and the formulation system was also able to exist stably.

[0090] Test Example 2 Corrosion Inhibition Performance Evaluation

[0091] With reference to the static hanging piece weight loss method in the petroleum and natural gas industry standard SY / 5273-2000, the corrosion inhibition performance of the products prepared in Examples 1 to 6 and Comparative Example 6 on 304 stainless steel at 40° C. (simulating laundry neutralization temperature) using the same corrosion inhibitor was evaluated. The specific steps are as follows: a numbered 304 stainless steel test piece with a size of 5.0 cm×5.0 cm×0.2 cm to be tested and evaluated is polished to a mirror finish with 300 mesh, 600 mesh, and 1200 mesh water-resistant sandpaper in the same manner, degreased with acetone, accurately weighed (weighed to an accuracy of 0.001 g), and then the test pieces are hung and immersed in the products prepared in Examples 1 to 6, Comparative Example 4, Comparative Example 5, and Comparative Example 6, and treated at a constant temperature of 40° C. for 4 hours, the test piece is taken out, rinsed with deionized water, and immediately rinsed with acetone, then wrapped with filter paper and placed in a dryer for 30 minutes and weighed (weighed to an accuracy of 0.001 g), and the corrosion inhibition rate (v) is calculated according to the following formula:

[0092]

[0093] Wherein, M is the weight difference before and after the test piece is soaked without adding the corrosion inhibitor heptadecene ethyl imidazoline quaternary ammonium salt, and m is the weight difference before and after the test piece is soaked with the corrosion inhibitor heptadecene ethyl imidazoline quaternary ammonium salt. Wherein, comparative example 4 is used as the blank comparison object without adding the corrosion inhibitor of embodiments 1 to 6; comparative example 5 is used as the blank comparison object without adding the corrosion inhibitor of comparative example 6. The larger the v, the lower the corrosiveness to the test piece. The specific test results are shown in Table 3.

[0094] Table 3 Corrosion inhibition performance test results

[0095] Sample source Corrosion inhibition rate Example 1 94.5％ Example 2 95.6％ Example 3 96.1％ Example 4 91.9％ Example 5 92.2％ Example 6 93.8％ Comparative Example 6 74.3％

[0096] Generally speaking, neutralizing acid agents are all injected into the laundry bin and the main wash water with alkaline residues for neutralization in the last step of washing, and the pH value after neutralization is neutral, so there is not much damage to stainless steel in general. However, considering that the distributor will suspend rotation in the washing machine's inner bin during the pumping process, a small amount of neutralizing acid agents may be sprayed onto the surface of stainless steel without water level during the neutralization process, so the corrosion inhibition performance of neutralizing acid agents is studied. It can be seen from the test results of Examples 1 to 6 in Table 3 that, in the case of adding the corrosion inhibitor heptadecene amine ethyl imidazoline quaternary ammonium salt, 304 stainless steel has obvious corrosion inhibition performance, as the strongest acid in the composite acid agent, namely methanesulfonic acid, with the increase of its addition amount, the corrosiveness will gradually increase, but the overall corrosion inhibition rate is greater than 91.9%, which can effectively prevent the corrosion of stainless steel by the composite acid agent. It can be seen from the test results of Comparative Example 6 that if methanesulfonic acid is replaced with sulfuric acid, the corrosion inhibition rate is greatly reduced, indicating that the corrosion to stainless steel becomes stronger.

[0097] Test Example 3 Neutralization Performance Evaluation

[0098] The actual washing and decontamination performance of the products prepared in Examples 1 to 6, Comparative Example 1 and Comparative Examples 6 to 7 was evaluated as follows: a Sea Lion washing machine (100 kg loading capacity, model XGQ-100F) was used to wash the same batch of pure cotton guest room sheets in a large hotel in Tianjin. The sheets were randomly grouped after sorting and then marked with a washing label; the single machine fabric loading capacity was 80±5 kg, the hardness of the washing water was 20 ppm on average, and the standard laundry detergent was prepared according to the first amendment to the national standard GB / T 13174-2008 "Determination of Detergent Detergent and Circulation Washing Performance of Clothing Detergents"; each test sample was subjected to single variable comparative washing according to the procedure in Table 4. After neutralization, the pH value of each group of high-dehydration drainage of the washing machine was tested at the drain outlet. The test method was GB / T 6368 "Determination of pH value of aqueous surfactant solution by potentiometric method" (1% concentration); the bed sheet obtained after the above treatment is directly dried in a dryer, and the dry bed sheet is tested using the method of GB / T7573-2009 "Determination of pH value of aqueous extract of textiles". The test results are shown in Table 5.

[0099] Table 4 Sheet washing program

[0100]

[0101] Table 5 Neutralization performance test results

[0102]

[0103] It can be seen from Table 5 that after being treated with the products in Examples 1 to 6, the pH value of the dry sheets is between 6.2 and 7.5, which is in the extremely weak acid to neutral range. This is not only close to the weak acidity of human skin (pH = 5.8) but also has a good protective effect on linens, because for pure cotton linens, it is not good to have a pH value that is too acidic or too alkaline, and a pH value that is too acidic is very easy to break. The product in Comparative Example 1 does not add an antistatic agent and has no obvious effect on the pH value of the linens. After being treated with the product in Comparative Example 6, the acidity is obviously too low. Not only is it lower than the pH value of human skin, it is easy to cause skin itching, and excessive acidity can easily cause linens to break. After being treated with the product in Comparative Example 7, the neutralization performance is significantly reduced, and the pH value is too high. Not only is it higher than the pH value of human skin, it is easy to cause skin itching, but it is also easy to cause long-term alkaline residues in the linens, resulting in graying and hardening. After neutralizing the linens with the products in Examples 1 to 6, the pH value of the discharged wastewater ranges from 6.0 to 7.5, which meets the requirements of 6.0 to 9.0 for the water quality discharged from sewage plants in the "Integrated Sewage Discharge Standard" GB8978-88 and the "Pollutant Discharge Standard for Urban Sewage Plants" GB18918-2002.

[0104] Test Example 4: Evaluation of antistatic performance

[0105] The antistatic performance of the products prepared in Examples 1 to 6 and Comparative Example 1 was evaluated as follows: A Hangxing washing machine (15 kg loading capacity, model GXB-15C) was used to wash the same batch of guest room bed sheets and polyester tablecloths used in a large hotel in Tianjin, and the bed sheets and polyester tablecloths were randomly grouped after sorting, and then marked with a washing mark. The single machine fabric loading capacity was 12±1 kg, and the washing was carried out according to the conventional washing procedure. The average hardness of the washing water was 20ppm, and the standard laundry detergent was prepared according to the first amendment of GB / T 13174-2008 "Determination of the detergency and cyclic washing performance of detergents for clothing materials". Each test sample was washed by single variable comparison according to the procedure in Table 4. The bed sheets after washing and high stripping were dried separately according to the grouping, and the cycle treatment was repeated 3 times; the polyester tablecloths after washing were ironed and cold-ironed separately according to the grouping, and the cycle treatment was repeated 3 times.

[0106] The recycled polyester tablecloth and guest room bed sheet were selected according to the markings and cut into 4.5cm×4.5cm. The static voltage and half-life were tested according to the method of GB / T 12703.1-2008 "Evaluation of electrostatic performance Part 1: Static voltage half-life". The test atmospheric environment conditions were: temperature (20±2)℃, relative humidity (25±5)%, ambient wind speed <0.1m / s, and the test results are shown in Table 6.

[0107] Table 6 Antistatic performance test results

[0108]

[0109] In the dry winter in the north with a relative humidity of 25%, the amount of static electricity generated by hotel linens during use is mainly determined by two factors: 1. The ease with which static electricity is generated by friction of the linens, which is mainly related to the type of linens; 2. The degree to which static electricity accumulates on the fabric.

[0110] It can be seen from Table 6 that compared with Comparative Example 1, after adding antistatic agent to treat polyester tablecloth, the static voltage and half-life of the products in Examples 1 to 6 are significantly reduced, the antistatic performance is improved, and the more antistatic agent is added, the better the antistatic effect; and for the guest room bed sheets made of pure cotton, although the static voltage and half-life are lower than those of polyester tablecloth, compared with Comparative Example 1, after adding antistatic agent, the static voltage and half-life of the products in Examples 1 to 6 are also significantly reduced, and the half-life level is also improved. This can undoubtedly improve the dining and accommodation experience of customers in the dry season.

[0111] Test Example 5 Rust Removal Performance Evaluation

[0112] Place a 27cm×44cm JB-00 white cloth (produced by China Light Daily Chemical Inspection and Certification Co., Ltd.) prepared in accordance with Appendix A of GB / T 13174 "Determination of the detergency and cyclic washing performance of detergents for clothing" on the workbench to ensure that the surface is flat; use a brush to evenly apply the rust liquid (a 50g / L ferric oxide aqueous dispersion with a ferric oxide particle size of 325 mesh) on the white cloth, wait for 4 hours to allow the rust liquid to fully penetrate and react, and then use a dryer to dry the resulting rust-stained cloth at 105°C for 2 hours; take out the dried stained cloth, cut it into 6.0cm×6.0cm, rinse it according to the method specified in 7.3 of GB / T 13174 "Determination of the detergency and cyclic washing performance of detergents for clothing" to remove the rust that has not penetrated into the white cloth, then take it out to dry, and mark it with a marking pen for use.

[0113] The rust removal performance of the products prepared in the above-mentioned Examples 1 to 6 and Comparative Examples 1, 4, 6 and 7 was evaluated as follows: Each test sample was subjected to single variable comparative washing according to the procedure in Table 4, and a blank control group without neutralizing acid was added, i.e., washing was performed according to the washing procedure in Table 4, and 150 mL of deionized water was used in Procedure 10 to replace the products prepared in the Examples and Comparative Examples. Washing conditions: A Hangxing washing machine (15 kg loading capacity, model GXB-15C) was used, and 3 pieces of prepared dirty cloth were marked and put into the washing machine, and 12±1 kg of bed sheets were loaded as accompanying wash items for a single machine. The average hardness of the washing water was 20 ppm, and the standard laundry detergent was prepared according to the first amendment to the national standard GB / T13174-2008 "Determination of the detergency and cyclic washing performance of detergents for clothing materials". The dirty cloth after washing and high stripping is picked out and dried separately. The whiteness test is carried out according to the method specified in 7.2 of "GB-T 13174-2008 Determination of the detergency and cyclic washing performance of detergents for clothing materials". The whiteness value W2 of the dirty cloth after washing and the whiteness value W1 of the towel before washing are measured respectively. The whiteness difference ⊿W=W2-W1. The larger the difference, the better the rust removal performance. The test results are shown in Table 7.

[0114] Table 7 Rust removal performance test results

[0115]

[0116] It can be seen from Table 7 that the rust removal performance of linens is mainly affected by the neutralizing acid agent, and the alkaline main washing stage has a weak effect on the rust removal of linens. It can be seen from Comparative Examples 1 and 4 that the addition of antistatic agents and / or corrosion inhibitors has little effect on the rust removal of linens, and the rust removal of linens is mainly affected by the composite acid agent; it can be seen from Comparative Example 6 that if methanesulfonic acid is replaced by sulfuric acid, the rust removal effect is slightly higher than that of Example 1, but considering the strong corrosiveness of sulfuric acid, Example 1 is still the best choice; it can be seen from Comparative Example 7 that if methanesulfonic acid is replaced by citric acid, the rust removal ability of linens is weak.

[0117] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An antistatic rust removal and acid neutralizing agent, comprising the following components by weight percentage: 2.0-6.0% antistatic agent, wherein the antistatic agent is a Gemini type quaternary ammonium salt; 15.5-41.0% of a composite acid, wherein the composite acid is methanesulfonic acid, glycolic acid and ammonium bifluoride; 1.0-5.0% of a chelating agent, wherein the chelating agent is a strong acid-resistant chelating agent; Corrosion inhibitor 0.5~2.0%; The balance is water.

2. The antistatic rust removal and acid neutralizing agent according to claim 1, characterized in that: The cation of the antistatic agent has a structure shown in Formula I: In formula I, R1 is C 12 ~C 16 of alkyl.

3. The antistatic rust removal and acid neutralizing agent according to claim 2, characterized in that: The antistatic agent includes ethylene bis (dodecyl dimethyl ammonium chloride) and / or ethylene bis (hexadecyl dimethyl ammonium chloride).

4. The antistatic rust removal and acid neutralizing agent according to any one of claims 1 to 3, characterized in that: The mass ratio of the methanesulfonic acid, glycolic acid and ammonium bifluoride is 10.0-25.0:5.0-14.0:0.5-2.

0.

5. The antistatic rust removal and acid neutralizing agent according to claim 1, characterized in that: The chelating agent includes tetrasodium dicarboxymethyl glutamate.

6. The antistatic rust removal and acid neutralizing agent according to claim 1, characterized in that: The corrosion inhibitor includes heptadecenylamineethylimidazoline quaternary ammonium.

7. The method for preparing the antistatic rust removal and neutralizing acid agent according to any one of claims 1 to 6, comprising the following steps: The antistatic agent, the composite acid agent, the chelating agent, the corrosion inhibitor and water are mixed to obtain the antistatic rust removal neutralizing acid agent.

8. The preparation method according to claim 7, characterized in that: The mixing comprises: adding an antistatic agent, a composite acid agent, a chelating agent and a corrosion inhibitor into the water in sequence.

9. Use of the antistatic rust-removing neutralizing acid agent according to any one of claims 1 to 6 or the antistatic rust-removing neutralizing acid agent prepared by the preparation method according to claim 7 or 8 in neutralization treatment of linens.

10. The use according to claim 9, characterized in that: The linens include hotel bedding linens and / or tablecloth linens, and the material of the linens includes pure cotton and / or polyester.

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