Preservative containing capryloyl hydroximic acid and p-hydroxyacetophenone and preparation method thereof

Abstract

The invention discloses a preservative containing capryloyl hydroximic acid and p-hydroxyacetophenone and a preparation method of the preservative, and belongs to the technical field of industrial preservatives. Wherein the preservative is prepared from the following raw materials in parts by weight: 100 to 150 parts of polyaniline microemulsion, 5 to 15 parts of polytetrafluoroethylene powder, 5 to 10 parts of capryloyl hydroximic acid and 2 to 8 parts of p-hydroxyacetophenone. The paint can be effectively compounded with conventional acrylic acid paint, meanwhile, good mechanical performance and salt-resistant and corrosion-resistant performance are brought, unilateral corrosion expansion at the lineation position is smaller than or equal to 2 mm, the surface of a paint film does not blister, rust and fall off, and the paint film has good corrosion resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial preservatives, and in particular relates to an improved preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone and a preparation method thereof. Background Art

[0002] Common industrial equipment is favored by designers because of its special mechanical or chemical properties and is increasingly widely used in the food industry, chemical equipment, etc. Because the industrial water environment contains a large amount of chloride, common metal equipment or plastic equipment suffers from pitting, intergranular corrosion, stress corrosion, etc., resulting in perforation and fracture. Therefore, it is necessary to design a protective layer on the surface of metal equipment or plastic equipment to prevent chloride ions from corroding the surface of industrial equipment. At present, anodizing, electrochemical method, and medium treatment are usually used to improve the corrosion resistance of industrial equipment. These methods have their own advantages, but the common disadvantage is that they are not simple enough and the cost is high. Coating protection has the advantages of simplicity and low cost, but some plastic equipment is difficult to be coated due to its low surface energy. There are also related patent technologies that propose the use of alkyd system and acrylic system coatings to have certain adhesion to stainless steel substrates or plastic equipment, but due to the poor acid and alkali resistance and salt water resistance of the alkyd system, the acrylic system is poorly matched as a front coating, which is not suitable for use as a common industrial equipment anti-corrosion coating. Summary of the invention

[0003] 1. Problems to be solved

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone and a preparation method thereof. It can be seen that the preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone prepared in the present application and the preparation method thereof can be effectively compounded with conventional acrylic coatings, while bringing better mechanical properties and salt resistance and corrosion resistance. The unilateral corrosion expansion at the scribe line is ≤2mm, the paint film surface does not bubble, rust or fall off, and has good corrosion resistance.

[0005] 2. Technical solution

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A preservative containing caprylhydroxamic acid and p-hydroxyacetophenone, comprising the following raw materials in parts by weight:

[0008]

[0009] The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone described above comprises the following raw materials in parts by weight:

[0010]

[0011]

[0012] The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone described above comprises the following raw materials in parts by weight:

[0013]

[0014] The preparation process of the above-mentioned preservative containing caprylhydroxamic acid and p-hydroxyacetophenone and the polyaniline microemulsion is as follows:

[0015] Prepare hydrochloric acid solution and sodium dodecylbenzene sulfonate and stir and mix, wherein the concentration of hydrochloric acid after stirring and mixing is 1.8 mol / L, wherein the concentration of sodium dodecylbenzene sulfonate after stirring and mixing is 0.4 mol / L, wherein the speed of stirring and mixing is 1000 r / min, wherein the time of stirring and mixing is 30 min;

[0016] Adding the stirred and mixed solution to the ammonium persulfate solution and continuing to stir and mix, which is recorded as the first mixed solution, wherein the concentration of the added ammonium persulfate is 0.3 mol / L;

[0017] Prepare pure aniline, and add it dropwise to the first mixed solution, wherein the concentration of the pure aniline after the addition is 0.9 mol / L, and add ammonium persulfate solution at the same time until the color of the solution changes to dark green, stop adding, and stir and mix for 12 hours, which is recorded as the second mixed solution;

[0018] The second mixed liquid is filtered to obtain polyaniline particles, and then washed with anhydrous ethanol and deionized water in sequence, and the polyaniline particles are redissolved in deionized water to obtain a polyaniline microemulsion, wherein the mass ratio of the polyaniline particles to the deionized water is 15:40;

[0019] Subsequently, an ammonia solution was added to the polyaniline microemulsion, wherein the concentration of the ammonia solution after addition was 8 mol / L. Subsequently, the mixture was stirred at a stirring speed of 400 r / min at 25°C for 6 hours, filtered, and washed with anhydrous ethanol and deionized water in sequence. Subsequently, the mixture was redissolved in deionized water with a solid-liquid mass ratio of 10:35 to obtain an improved polyaniline microemulsion.

[0020] The above-mentioned preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone and the above-mentioned polytetrafluoroethylene powder are purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

[0021] A method for preparing a preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following steps:

[0022] The preparation method of the preservative containing caprylhydroxamic acid and p-hydroxyacetophenone is as follows:

[0023] Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] It can be seen that the preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone prepared in the present application and the preparation method thereof can be effectively compounded with conventional acrylic coatings, while bringing better mechanical properties and salt resistance and anti-corrosion properties. The single-sided corrosion expansion at the scribe line is ≤2mm, the paint film surface does not bubble, rust, or fall off, and has good corrosion resistance. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific embodiments.

[0028] Example 1

[0029] The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following raw materials in parts by weight:

[0030]

[0031] The preparation process of the above-mentioned preservative containing caprylhydroxamic acid and p-hydroxyacetophenone and the polyaniline microemulsion is as follows:

[0032] Prepare hydrochloric acid solution and sodium dodecylbenzene sulfonate and stir and mix, wherein the concentration of hydrochloric acid after stirring and mixing is 1.8 mol / L, wherein the concentration of sodium dodecylbenzene sulfonate after stirring and mixing is 0.4 mol / L, wherein the speed of stirring and mixing is 1000 r / min, wherein the time of stirring and mixing is 30 min;

[0033] Adding the stirred and mixed solution to the ammonium persulfate solution and continuing to stir and mix, which is recorded as the first mixed solution, wherein the concentration of the added ammonium persulfate is 0.3 mol / L;

[0034] Prepare pure aniline, and add it dropwise to the first mixed solution, wherein the concentration of the pure aniline after the addition is 0.9 mol / L, and add ammonium persulfate solution at the same time until the color of the solution changes to dark green, stop adding, and stir and mix for 12 hours, which is recorded as the second mixed solution;

[0035] The second mixed liquid is filtered to obtain polyaniline particles, and then washed with anhydrous ethanol and deionized water in sequence, and the polyaniline particles are redissolved in deionized water to obtain a polyaniline microemulsion, wherein the mass ratio of the polyaniline particles to the deionized water is 15:40;

[0036] Subsequently, an ammonia solution was added to the polyaniline microemulsion, wherein the concentration of the ammonia solution after addition was 8 mol / L. Subsequently, the mixture was stirred at a stirring speed of 400 r / min at 25°C for 6 hours, filtered, and washed with anhydrous ethanol and deionized water in sequence. Subsequently, the mixture was redissolved in deionized water with a solid-liquid mass ratio of 10:35 to obtain an improved polyaniline microemulsion.

[0037] The above-mentioned preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone and the above-mentioned polytetrafluoroethylene powder are purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

[0038] The preparation method of a preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following steps:

[0039] The preparation method of the preservative containing caprylhydroxamic acid and p-hydroxyacetophenone is as follows:

[0040] Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

[0041] Example 2

[0042] The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following raw materials in parts by weight:

[0043]

[0044] The preparation process of the above-mentioned preservative containing caprylhydroxamic acid and p-hydroxyacetophenone and the polyaniline microemulsion is as follows:

[0045] Prepare hydrochloric acid solution and sodium dodecylbenzene sulfonate and stir and mix, wherein the concentration of hydrochloric acid after stirring and mixing is 1.8 mol / L, wherein the concentration of sodium dodecylbenzene sulfonate after stirring and mixing is 0.4 mol / L, wherein the speed of stirring and mixing is 1000 r / min, wherein the time of stirring and mixing is 30 min;

[0046] Adding the stirred and mixed solution to the ammonium persulfate solution and continuing to stir and mix, which is recorded as the first mixed solution, wherein the concentration of the added ammonium persulfate is 0.3 mol / L;

[0047] Prepare pure aniline, and add it dropwise to the first mixed solution, wherein the concentration of the pure aniline after the addition is 0.9 mol / L, and add ammonium persulfate solution at the same time until the color of the solution changes to dark green, stop adding, and stir and mix for 12 hours, which is recorded as the second mixed solution;

[0048] The second mixed liquid is filtered to obtain polyaniline particles, and then washed with anhydrous ethanol and deionized water in sequence, and the polyaniline particles are redissolved in deionized water to obtain a polyaniline microemulsion, wherein the mass ratio of the polyaniline particles to the deionized water is 15:40;

[0049] Subsequently, an ammonia solution was added to the polyaniline microemulsion, wherein the concentration of the ammonia solution after addition was 8 mol / L. Subsequently, the mixture was stirred at a stirring speed of 400 r / min at 25°C for 6 hours, filtered, and washed with anhydrous ethanol and deionized water in sequence. Subsequently, the mixture was redissolved in deionized water with a solid-liquid mass ratio of 10:35 to obtain an improved polyaniline microemulsion.

[0050] The above-mentioned preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone and the above-mentioned polytetrafluoroethylene powder are purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

[0051] The preparation method of a preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following steps:

[0052] The preparation method of the preservative containing caprylhydroxamic acid and p-hydroxyacetophenone is as follows:

[0053] Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

[0054] Example 3

[0055] The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following raw materials in parts by weight:

[0056]

[0057] The preparation process of the above-mentioned preservative containing caprylhydroxamic acid and p-hydroxyacetophenone and the polyaniline microemulsion is as follows:

[0058] Prepare hydrochloric acid solution and sodium dodecylbenzene sulfonate and stir and mix, wherein the concentration of hydrochloric acid after stirring and mixing is 1.8 mol / L, wherein the concentration of sodium dodecylbenzene sulfonate after stirring and mixing is 0.4 mol / L, wherein the speed of stirring and mixing is 1000 r / min, wherein the time of stirring and mixing is 30 min;

[0059] Adding the stirred and mixed solution to the ammonium persulfate solution and continuing to stir and mix, which is recorded as the first mixed solution, wherein the concentration of the added ammonium persulfate is 0.3 mol / L;

[0060] Prepare pure aniline, and add it dropwise to the first mixed solution, wherein the concentration of the pure aniline after the addition is 0.9 mol / L, and add ammonium persulfate solution at the same time until the color of the solution changes to dark green, stop adding, and stir and mix for 12 hours, which is recorded as the second mixed solution;

[0061] The second mixed liquid is filtered to obtain polyaniline particles, and then washed with anhydrous ethanol and deionized water in sequence, and the polyaniline particles are redissolved in deionized water to obtain a polyaniline microemulsion, wherein the mass ratio of the polyaniline particles to the deionized water is 15:40;

[0062] Subsequently, an ammonia solution was added to the polyaniline microemulsion, wherein the concentration of the ammonia solution after addition was 8 mol / L. Subsequently, the mixture was stirred at a stirring speed of 400 r / min at 25°C for 6 hours, filtered, and washed with anhydrous ethanol and deionized water in sequence. Subsequently, the mixture was redissolved in deionized water with a solid-liquid mass ratio of 10:35 to obtain an improved polyaniline microemulsion.

[0063] The above-mentioned preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone and the above-mentioned polytetrafluoroethylene powder are purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

[0064] The preparation method of a preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following steps:

[0065] The preparation method of the preservative containing caprylhydroxamic acid and p-hydroxyacetophenone is as follows:

[0066] Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

[0067] Example 4

[0068] The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following raw materials in parts by weight:

[0069]

[0070]

[0071] The preparation process of the above-mentioned preservative containing caprylhydroxamic acid and p-hydroxyacetophenone and the polyaniline microemulsion is as follows:

[0072] Prepare hydrochloric acid solution and sodium dodecylbenzene sulfonate and stir and mix, wherein the concentration of hydrochloric acid after stirring and mixing is 1.8 mol / L, wherein the concentration of sodium dodecylbenzene sulfonate after stirring and mixing is 0.4 mol / L, wherein the speed of stirring and mixing is 1000 r / min, wherein the time of stirring and mixing is 30 min;

[0073] Adding the stirred and mixed solution to the ammonium persulfate solution and continuing to stir and mix, which is recorded as the first mixed solution, wherein the concentration of the added ammonium persulfate is 0.3 mol / L;

[0074] Prepare pure aniline, and add it dropwise to the first mixed solution, wherein the concentration of the pure aniline after the addition is 0.9 mol / L, and add ammonium persulfate solution at the same time until the color of the solution changes to dark green, stop adding, and stir and mix for 12 hours, which is recorded as the second mixed solution;

[0075] The second mixed liquid is filtered to obtain polyaniline particles, and then washed with anhydrous ethanol and deionized water in sequence, and the polyaniline particles are redissolved in deionized water to obtain a polyaniline microemulsion, wherein the mass ratio of the polyaniline particles to the deionized water is 15:40;

[0076] Subsequently, an ammonia solution was added to the polyaniline microemulsion, wherein the concentration of the ammonia solution after addition was 8 mol / L. Subsequently, the mixture was stirred at a stirring speed of 400 r / min at 25°C for 6 hours, filtered, and washed with anhydrous ethanol and deionized water in sequence. Subsequently, the mixture was redissolved in deionized water with a solid-liquid mass ratio of 10:35 to obtain an improved polyaniline microemulsion.

[0077] The above-mentioned preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone and the above-mentioned polytetrafluoroethylene powder are purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

[0078] The preparation method of a preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following steps:

[0079] The preparation method of the preservative containing caprylhydroxamic acid and p-hydroxyacetophenone is as follows:

[0080] Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

[0081] Example 5

[0082] The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following raw materials in parts by weight:

[0083]

[0084] The preparation process of the above-mentioned preservative containing caprylhydroxamic acid and p-hydroxyacetophenone and the polyaniline microemulsion is as follows:

[0085] Prepare hydrochloric acid solution and sodium dodecylbenzene sulfonate and stir and mix, wherein the concentration of hydrochloric acid after stirring and mixing is 1.8 mol / L, wherein the concentration of sodium dodecylbenzene sulfonate after stirring and mixing is 0.4 mol / L, wherein the speed of stirring and mixing is 1000 r / min, wherein the time of stirring and mixing is 30 min;

[0086] Adding the stirred and mixed solution to the ammonium persulfate solution and continuing to stir and mix, which is recorded as the first mixed solution, wherein the concentration of the added ammonium persulfate is 0.3 mol / L;

[0087] Prepare pure aniline, and add it dropwise to the first mixed solution, wherein the concentration of the pure aniline after the addition is 0.9 mol / L, and add ammonium persulfate solution at the same time until the color of the solution changes to dark green, stop adding, and stir and mix for 12 hours, which is recorded as the second mixed solution;

[0088] The second mixed liquid is filtered to obtain polyaniline particles, and then washed with anhydrous ethanol and deionized water in sequence, and the polyaniline particles are redissolved in deionized water to obtain a polyaniline microemulsion, wherein the mass ratio of the polyaniline particles to the deionized water is 15:40;

[0089] Subsequently, an ammonia solution was added to the polyaniline microemulsion, wherein the concentration of the ammonia solution after addition was 8 mol / L. Subsequently, the mixture was stirred at a stirring speed of 400 r / min at 25°C for 6 hours, filtered, and washed with anhydrous ethanol and deionized water in sequence. Subsequently, the mixture was redissolved in deionized water with a solid-liquid mass ratio of 10:35 to obtain an improved polyaniline microemulsion.

[0090] The above-mentioned preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone and the above-mentioned polytetrafluoroethylene powder are purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

[0091] The preparation method of the preservative of caprylhydroxamic acid and p-hydroxyacetophenone comprises the following steps:

[0092] The preparation method of the preservative containing caprylhydroxamic acid and p-hydroxyacetophenone is as follows:

[0093] Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

[0094] Comparative Example 1

[0095] The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone comprises the following raw materials in parts by weight:

[0096] 10 parts of polytetrafluoroethylene powder,

[0097] 8 parts of capryloyl hydroxamic acid,

[0098] 6 parts of p-hydroxyacetophenone.

[0099] The above-mentioned preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone and the above-mentioned polytetrafluoroethylene powder are purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

[0100] The preparation method of the preservative of caprylhydroxamic acid and p-hydroxyacetophenone comprises the following steps:

[0101] The preparation method of the preservative containing caprylhydroxamic acid and p-hydroxyacetophenone is as follows:

[0102] Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

[0103] Comparative Example 2

[0104] The preservative containing p-hydroxyacetophenone comprises the following raw materials in parts by weight:

[0105] 140 parts of polyaniline microemulsion,

[0106] 10 parts of polytetrafluoroethylene powder,

[0107] 6 parts of p-hydroxyacetophenone.

[0108] The preparation process of the above-mentioned preservative containing p-hydroxyacetophenone and the polyaniline microemulsion is as follows:

[0109] Prepare hydrochloric acid solution and sodium dodecylbenzene sulfonate and stir and mix, wherein the concentration of hydrochloric acid after stirring and mixing is 1.8 mol / L, wherein the concentration of sodium dodecylbenzene sulfonate after stirring and mixing is 0.4 mol / L, wherein the speed of stirring and mixing is 1000 r / min, wherein the time of stirring and mixing is 30 min;

[0110] Adding the stirred and mixed solution to the ammonium persulfate solution and continuing to stir and mix, which is recorded as the first mixed solution, wherein the concentration of the added ammonium persulfate is 0.3 mol / L;

[0111] Prepare pure aniline, and add it dropwise to the first mixed solution, wherein the concentration of the pure aniline after the addition is 0.9 mol / L, and add ammonium persulfate solution at the same time until the color of the solution changes to dark green, stop adding, and stir and mix for 12 hours, which is recorded as the second mixed solution;

[0112] The second mixed liquid is filtered to obtain polyaniline particles, and then washed with anhydrous ethanol and deionized water in sequence, and the polyaniline particles are redissolved in deionized water to obtain a polyaniline microemulsion, wherein the mass ratio of the polyaniline particles to the deionized water is 15:40;

[0113] Subsequently, an ammonia solution was added to the polyaniline microemulsion, wherein the concentration of the ammonia solution after addition was 8 mol / L. Subsequently, the mixture was stirred at a stirring speed of 400 r / min at 25°C for 6 hours, filtered, and washed with anhydrous ethanol and deionized water in sequence. Subsequently, the mixture was redissolved in deionized water with a solid-liquid mass ratio of 10:35 to obtain an improved polyaniline microemulsion.

[0114] The above-mentioned preservative containing p-hydroxyacetophenone and the above-mentioned polytetrafluoroethylene powder are purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

[0115] The preparation method of a preservative containing p-hydroxyacetophenone comprises the following steps:

[0116] The preparation method of the preservative containing p-hydroxyacetophenone is as follows:

[0117] Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

[0118] Comparative Example 3

[0119] The preservative containing caprylhydroxamic acid comprises the following raw materials in parts by weight:

[0120] 140 parts of polyaniline microemulsion,

[0121] 10 parts of polytetrafluoroethylene powder,

[0122] 8 parts of caprylhydroxamic acid.

[0123] The preparation process of the above-mentioned preservative containing caprylhydroxamic acid and the polyaniline microemulsion is as follows:

[0124] Prepare hydrochloric acid solution and sodium dodecylbenzene sulfonate and stir and mix, wherein the concentration of hydrochloric acid after stirring and mixing is 1.8 mol / L, wherein the concentration of sodium dodecylbenzene sulfonate after stirring and mixing is 0.4 mol / L, wherein the speed of stirring and mixing is 1000 r / min, wherein the time of stirring and mixing is 30 min;

[0125] Adding the stirred and mixed solution to the ammonium persulfate solution and continuing to stir and mix, which is recorded as the first mixed solution, wherein the concentration of the added ammonium persulfate is 0.3 mol / L;

[0126] Prepare pure aniline, and add it dropwise to the first mixed solution, wherein the concentration of the pure aniline after the addition is 0.9 mol / L, and add ammonium persulfate solution at the same time until the color of the solution changes to dark green, stop adding, and stir and mix for 12 hours, which is recorded as the second mixed solution;

[0127] The second mixed liquid is filtered to obtain polyaniline particles, and then washed with anhydrous ethanol and deionized water in sequence, and the polyaniline particles are redissolved in deionized water to obtain a polyaniline microemulsion, wherein the mass ratio of the polyaniline particles to the deionized water is 15:40;

[0128] Subsequently, an ammonia solution was added to the polyaniline microemulsion, wherein the concentration of the ammonia solution after addition was 8 mol / L. Subsequently, the mixture was stirred at a stirring speed of 400 r / min at 25°C for 6 hours, filtered, and washed with anhydrous ethanol and deionized water in sequence. Subsequently, the mixture was redissolved in deionized water with a solid-liquid mass ratio of 10:35 to obtain an improved polyaniline microemulsion.

[0129] The above-mentioned preservative containing octanoylhydroxamic acid and the above-mentioned polytetrafluoroethylene powder are purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

[0130] The preparation method of the preservative of octanoylhydroxamic acid comprises the following steps:

[0131] The preparation method of the preservative containing caprylhydroxamic acid is as follows:

[0132] Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

[0133] Test plan:

[0134] The test was carried out with commonly used stainless steel pipes, purchased from Guangdong Jicai Guanyi Stainless Steel Pipe Co., Ltd., model DN32, purchase link: https: / / b2b.baidu.com / land? url=https%3A%2F%2Fb2bwork.baidu.com%2Fland%3Flid%3D1729519186495084522&query=%E4%B8%8D%E9%94%88%E9%92%A2%E7%AE%A1&lattr=ot&xzhid=38885212&pi =b2b.s.main.4..6425141109830294&category=%E5%86%B6%E9%87%91%E9%92%A2%E 6%9D%90%3B%E4%B8%8D%E9%94%88%E9%92%A2%E7%AE%A1%3B%E4%B8%8D%E9%94%88%E9 %92%A2%E5%9C%86%E7%AE%A1&fid=67567616%2C1657932411813&iid=0f4ef3a3d06a87fef600e662c2d081d5&miniId=8469&jid=1852869970&prod_type=0; The preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone prepared in Examples 1-5 of the present application and the preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone prepared in Comparative Examples 1-3 were mixed with conventional acrylic paint (purchased from Beijing Oriental Yuhong Waterproof Technology Co., Ltd., model SPU-301) in a mass ratio of 1:15, and then sprayed onto the surface of the above-mentioned stainless steel pipe, wherein the dry film thickness of the paint film is 90±5μm, and left at room temperature for 7d.

[0135] (1) Adhesion (GB / T 9286-98, GB / T 5210-2006)

[0136] The results of Examples 1-5 were 1st level / 18.8 MPa, 1st level / 18.9 MPa, 0th level / 19.3 MPa, 0th level / 19.5 MPa, 0th level / 19.7 MPa, respectively;

[0137] The results of Comparative Examples 1-3 were Grade 3 / 14.2 MPa, Grade 3 / 15.0 MPa, and Grade 3 / 15.4 MPa, respectively.

[0138] (2) Salt spray resistance (GB / T 1771-93)

[0139] The results of Examples 1-5 were 2600 h, 2800 h, 2900 h, 3100 h, and 3200 h, respectively;

[0140] The results of Comparative Examples 1-3 are 1200h, 1400h, and 1500h, respectively.

[0141] Combined with the above data, it can be seen that the preservative containing octanoylhydroxamic acid and p-hydroxyacetophenone prepared in the present application and its preparation method can be effectively compounded with conventional acrylic coatings, while bringing better mechanical properties and salt resistance and anti-corrosion properties. The single-sided corrosion expansion at the scribe line is ≤2mm, the paint film surface does not bubble, rust, or fall off, and has good corrosion resistance.

[0142] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. A preservative containing caprylhydroxamic acid and p-hydroxyacetophenone, characterized in that: In parts by weight, the following raw materials are included:

2. The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone according to claim 1, characterized in that: In parts by weight, the following raw materials are included:

3. The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone according to claim 2, characterized in that: In parts by weight, the following raw materials are included:

4. The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone according to claim 1, characterized in that: The preparation process of the polyaniline microemulsion is as follows: Prepare hydrochloric acid solution and sodium dodecylbenzene sulfonate and stir and mix, wherein the concentration of hydrochloric acid after stirring and mixing is 1.8 mol / L, wherein the concentration of sodium dodecylbenzene sulfonate after stirring and mixing is 0.4 mol / L, wherein the speed of stirring and mixing is 1000 r / min, wherein the time of stirring and mixing is 30 min; Adding the stirred and mixed solution to the ammonium persulfate solution and continuing to stir and mix, which is recorded as the first mixed solution, wherein the concentration of the added ammonium persulfate is 0.3 mol / L; Prepare pure aniline, and add it dropwise to the first mixed solution, wherein the concentration of the pure aniline after the addition is 0.9 mol / L, and add ammonium persulfate solution at the same time until the color of the solution changes to dark green, stop adding, and stir and mix for 12 hours, which is recorded as the second mixed solution; The second mixed liquid is filtered to obtain polyaniline particles, and then washed with anhydrous ethanol and deionized water in sequence, and the polyaniline particles are redissolved in deionized water to obtain a polyaniline microemulsion, wherein the mass ratio of the polyaniline particles to the deionized water is 15:40; Subsequently, an ammonia solution was added to the polyaniline microemulsion, wherein the concentration of the ammonia solution after addition was 8 mol / L. Subsequently, the mixture was stirred at a stirring speed of 400 r / min at 25°C for 6 hours, filtered, and washed with anhydrous ethanol and deionized water in sequence. Subsequently, the mixture was redissolved in deionized water with a solid-liquid mass ratio of 10:35 to obtain an improved polyaniline microemulsion.

5. The preservative containing caprylhydroxamic acid and p-hydroxyacetophenone according to claim 1, characterized in that: The polytetrafluoroethylene powder is purchased from Jining Sanshi Biotechnology Co., Ltd., with a CAS number of 9002-84-0 and a model of SH-618548.

6. A method for preparing a preservative containing caprylhydroxamic acid and p-hydroxyacetophenone as claimed in claim 1, characterized in that: The following steps are involved: The preparation method of the preservative containing caprylhydroxamic acid and p-hydroxyacetophenone is as follows: Heat the polyaniline microemulsion to 85°C, add polytetrafluoroethylene powder, octanoylhydroxamic acid and p-hydroxyacetophenone and mix thoroughly, then cool to 40°C, homogenize, and cool to room temperature.

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