Long-acting anti-aging acrylic anticorrosive paint and production process thereof

Abstract

The application relates to the technical field of anticorrosive paint and discloses long-acting aging-resistant acrylic anticorrosive paint and a production process thereof, wherein the long-acting aging-resistant acrylic anticorrosive paint comprises the following components by weight: 40-50 parts of acrylic emulsion, 4-8 parts of polyester resin, 4-8 parts of amino resin, 3-4 parts of film-forming aid, 20-25 parts of modified talcum powder, 10-12 parts of solvent and 4-5 parts of auxiliary agent; the modified talcum powder is obtained by modifying talcum powder with a modifier, wherein the modifier comprises 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and / or hydroxybutyryl amide phenyl ether. The above technical scheme solves the problem of poor anticorrosive performance of the acrylic anticorrosive paint in the prior art.

Description

Technical Field

[0001] This invention relates to the field of anti-corrosion paint technology, specifically to a long-lasting aging-resistant acrylic anti-corrosion paint and its production process. Background Technology

[0002] Polymer paints are materials based on polymer compounds and are widely used in industrial protection, building decoration, transportation, and packaging industries. With increasing environmental awareness, acrylic anti-corrosion paints are gaining widespread attention. Acrylic anti-corrosion paints not only have high gloss retention, diverse colors, and strong decorative properties, but also provide physical protection, improving durability and enhancing product value.

[0003] However, acrylic anti-corrosion paints inevitably come into contact with oxygen, water vapor, and other corrosive substances in the air during use, especially in environments such as chemical plants and offshore platforms. The existing anti-corrosion performance of acrylic anti-corrosion paints is insufficient to meet the application requirements of various environments. Therefore, it is necessary to improve the anti-corrosion and aging resistance of acrylic anti-corrosion paints to better meet the needs of different environments. Summary of the Invention

[0004] This invention proposes a long-lasting, aging-resistant acrylic anti-corrosion paint and its production process, which solves the problem of poor anti-corrosion performance of acrylic anti-corrosion paints in related technologies.

[0005] The technical solution of the present invention is as follows:

[0006] This invention proposes a long-lasting, aging-resistant acrylic anti-corrosion paint, comprising the following raw materials in parts by weight: 40-50 parts acrylic emulsion, 4-8 parts polyester resin, 4-8 parts amino resin, 3-4 parts film-forming aid, 20-25 parts modified talc, 10-12 parts solvent, and 4-5 parts additives; wherein the modified talc is obtained by modifying talc with a modifier, the modifier comprising 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and / or hydroxybutyramide phenyl ether.

[0007] As a further technical solution, the preparation method of the modified talc powder includes the following steps: adding the modifier to the solvent and mixing it evenly, then adding talc powder for modification to obtain modified talc powder.

[0008] As a further technical solution, the modification temperature is 50~60℃, and the modification time is 2~3h.

[0009] As a further technical solution, the modifier is DMSO solvent.

[0010] As a further technical solution, the particle size of the talc powder is 1250 mesh.

[0011] As a further technical solution, when the modifier is composed of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and hydroxybutyramide phenyl ether, the mass ratio of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol to hydroxybutyramide phenyl ether is 1:2~5.

[0012] As a further technical solution, when the modifier is composed of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and hydroxybutyramide phenyl ether, the mass ratio of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol to hydroxybutyramide phenyl ether is 1:3.

[0013] As a further technical solution, the acrylic emulsion includes one or more of LA-6099 waterborne acrylic emulsion, LA-6090B waterborne acrylic emulsion, and LA-624A waterborne acrylic emulsion.

[0014] As a further technical solution, the acrylic emulsion is composed of LA-6090B waterborne acrylic emulsion and LA-624A waterborne acrylic emulsion.

[0015] As a further technical solution, the mass ratio of the LA-6090B waterborne acrylic emulsion to the LA-624A waterborne acrylic emulsion is 1:3~7.

[0016] As a further technical solution, the mass ratio of the LA-6090B waterborne acrylic emulsion to the LA-624A waterborne acrylic emulsion is 1:4.

[0017] As a further technical solution, the amount of the modifier added is 5-8% of the mass of talc powder.

[0018] As a further technical solution, the film-forming aid includes one or more of dodecyl alcohol ester, benzyl alcohol, and propylene glycol methyl ether acetate.

[0019] As a further technical solution, the solvent is water.

[0020] As a further technical solution, the additives include one or more of dispersants, defoamers, thickeners, and anti-settling agents.

[0021] As a further technical solution, when the additive is composed of dispersant, defoamer, thickener and anti-settling agent, the mass ratio of dispersant, defoamer, thickener and anti-settling agent is 2:1:2:1.

[0022] As a further technical solution, the dispersant includes one or more of sodium dodecyl sulfate, triethylhexyl phosphate, and methylpentanol.

[0023] As a further technical solution, the defoamer includes one or more of polysiloxane, fatty alcohol polyoxyethylene ether, and polyoxyethylene stearate.

[0024] As a further technical solution, the thickener is polyacrylamide.

[0025] As a further technical solution, the anti-settling agent includes one or more of polyamide wax, oxidized polyethylene wax, and fumed silica.

[0026] The present invention also proposes a production process for a long-lasting aging-resistant acrylic anti-corrosion paint, comprising the following steps: mixing the raw materials evenly to obtain a long-lasting aging-resistant acrylic anti-corrosion paint.

[0027] The working principle and beneficial effects of this invention are as follows:

[0028] In this invention, acrylic emulsion is used as the main raw material, and polyester resin and amino resin are also added to improve the weather resistance, flexibility and chemical stability of acrylic anticorrosive paint. The overall performance of acrylic anticorrosive paint is improved. The addition of talc can improve processing performance and weather resistance. Moreover, by modifying talc with 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and / or hydroxybutyramide phenyl ether, the corrosion resistance and wear resistance of acrylic anticorrosive paint can be further improved, solving the problem of poor corrosion resistance of acrylic anticorrosive paint and extending the service life of acrylic anticorrosive paint. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] In the following embodiments and comparative examples:

[0031] Polyester resin: Model 196, purchased from Jinan Jingyi Technology Co., Ltd.;

[0032] Amino resin: Model 582-2, purchased from Jinan Dahui Chemical Technology Co., Ltd.;

[0033] Polyamide wax: Model 690, purchased from Guangdong Shunde Shibang Jiaming Chemical Co., Ltd.;

[0034] Polyacrylamide, model Tianhong 014A, purchased from Gongyi Tianhong Water Purification Filter Material Factory;

[0035] Talc powder: particle size 1250 mesh, silica content ≥65%, magnesium oxide content ≥30%, purchased from Lingshou County Woyuan Mineral Products Processing Plant;

[0036] The specifications and manufacturers of various models of water-based acrylic emulsions are as follows:

[0037]

[0038] Example 1

[0039] After mixing 40 parts of water-based acrylic emulsion, 4 parts of polyester resin, 4 parts of amino resin, 3 parts of dodecyl alcohol ester, 20 parts of modified talc, 10 parts of water, and 4 parts of additives evenly, a long-lasting aging-resistant acrylic anti-corrosion paint is obtained. The water-based acrylic emulsion is model LA-6090B. The additives are composed of sodium dodecyl sulfate, fatty alcohol polyoxyethylene ether, polyacrylamide, and polyamide wax in a mass ratio of 2:1:2:1.

[0040] The preparation method of modified talc includes the following steps: 2.4g of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol is added to 300mL of DMSO solvent and mixed evenly. Then, 40g of talc is added and mixed evenly again. The mixture is modified at 50℃ for 3h and dried to obtain modified talc.

[0041] Example 2

[0042] A long-lasting, aging-resistant acrylic anti-corrosion paint was obtained by mixing 45 parts of water-based acrylic emulsion, 6 parts of polyester resin, 6 parts of amino resin, 3.5 parts of benzyl alcohol, 23 parts of modified talc, 11 parts of water, and 4.5 parts of additives evenly. The water-based acrylic emulsion was model LA-6090B. The additives consisted of triethylhexyl phosphoric acid, fatty alcohol polyoxyethylene ether, polyacrylamide, and polyamide wax in a mass ratio of 2:1:2:1.

[0043] The preparation method of modified talc includes the following steps: 2.8g of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol is added to 300mL of DMSO solvent and mixed evenly. Then, 40g of talc is added and mixed evenly again. The mixture is modified at 55℃ for 2.5h and dried to obtain modified talc.

[0044] Example 3

[0045] A long-lasting, aging-resistant acrylic anti-corrosion paint is obtained by mixing 50 parts of water-based acrylic emulsion, 8 parts of polyester resin, 8 parts of amino resin, 4 parts of propylene glycol methyl ether acetate, 25 parts of modified talc, 12 parts of water, and 5 parts of additives evenly. The water-based acrylic emulsion is model LA-6090B. The additives are composed of methyl pentanol, fatty alcohol polyoxyethylene ether, polyacrylamide, and polyamide wax in a mass ratio of 2:1:2:1.

[0046] The preparation method of modified talc includes the following steps: 3.2 g of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol is added to 300 mL of DMSO solvent and mixed evenly. Then, 40 g of talc is added and mixed evenly again. The mixture is modified at 60 °C for 2 h and dried to obtain modified talc.

[0047] Example 4

[0048] The only difference between this embodiment and Example 1 is that 2.4g of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol is replaced with an equal amount of hydroxybutyramide phenyl ether.

[0049] Example 5

[0050] The only difference between this embodiment and Example 1 is that 2.4g of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol is replaced with 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and hydroxybutyramide phenyl ether in a mass ratio of 1:2.

[0051] Example 6

[0052] The only difference between this embodiment and Example 1 is that 2.4g of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol is replaced with 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and hydroxybutyramide phenyl ether in a mass ratio of 1:3.

[0053] Example 7

[0054] The only difference between this embodiment and Example 1 is that 2.4g of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol is replaced with 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and hydroxybutyramide phenyl ether in a mass ratio of 1:5.

[0055] Example 8

[0056] The only difference between this embodiment and Example 6 is that the aqueous acrylic emulsion is LA-624A aqueous acrylic emulsion.

[0057] Example 9

[0058] The only difference between this embodiment and Example 6 is that the aqueous acrylic emulsion is composed of LA-6090B aqueous acrylic emulsion and LA-624A aqueous acrylic emulsion in a mass ratio of 1:3.

[0059] Example 10

[0060] The only difference between this embodiment and Example 6 is that the aqueous acrylic emulsion is composed of LA-6090B aqueous acrylic emulsion and LA-624A aqueous acrylic emulsion in a mass ratio of 1:4.

[0061] Example 11

[0062] The only difference between this embodiment and Example 6 is that the aqueous acrylic emulsion is composed of LA-6090B aqueous acrylic emulsion and LA-624A aqueous acrylic emulsion in a mass ratio of 1:7.

[0063] Example 12

[0064] The only difference between this embodiment and Example 9 is that all of the LA-6090B waterborne acrylic emulsion is replaced with an equal amount of LA-6099 waterborne acrylic emulsion.

[0065] Comparative Example 1

[0066] After mixing 40 parts of water-based acrylic emulsion, 4 parts of polyester resin, 4 parts of amino resin, 3 parts of dodecyl alcohol ester, 20 parts of talc, 8 parts of water, and 4 parts of additives evenly, a long-lasting aging-resistant acrylic anti-corrosion paint is obtained. The water-based acrylic emulsion is model LA-6090B. The additives are composed of sodium dodecyl sulfate, fatty alcohol polyoxyethylene ether, polyacrylamide, and polyamide wax in a mass ratio of 2:1:2:1.

[0067] Test case

[0068] The acrylic anti-corrosion paints used in Examples 1-12 and Comparative Example 1 were applied to the surface of a steel plate (150mm × 10mm) with a coating thickness of 90±5μm. The salt spray resistance time (5% NaCl) was determined according to GB / T 1771-2007 "Determination of resistance to neutral salt spray of paints and varnishes". The abrasion resistance (750g, 500r, CS-17) was determined according to GB / T 1768-2006 "Determination of abrasion resistance of paints and varnishes - Rotary rubber grinding wheel method". The test results are shown in Table 1.

[0069] Table 1 Performance of acrylic anti-corrosion paints in Examples 1-12 and Comparative Example 1

[0070]

[0071] Compared with Example 1, the talc powder in Comparative Example 1 was not modified. The results showed that the salt spray resistance and abrasion resistance of the acrylic anticorrosive paint in Example 1 were improved. This indicates that modifying the talc powder with 2-[(2-methoxy-4-nitrophenyl)amino]ethanol can improve the salt spray resistance and abrasion resistance of the acrylic anticorrosive paint.

[0072] Compared with Example 1, Example 4 used hydroxybutyramide phenyl ether to modify talc powder, and Examples 5-7 used 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and hydroxybutyramide phenyl ether to modify talc powder together. The results showed that the salt spray resistance and abrasion resistance of the acrylic anticorrosive paint in Examples 5-7 were higher than those in Examples 1 and 4, indicating that modifying talc powder with 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and hydroxybutyramide phenyl ether together can further improve the salt spray resistance and abrasion resistance of acrylic anticorrosive paint.

[0073] Compared with Example 1, the waterborne acrylic emulsion in Example 8 was LA-624A waterborne acrylic emulsion, the waterborne acrylic resin in Examples 9-11 was composed of LA-6090B waterborne acrylic resin and LA-624A waterborne acrylic resin, and the waterborne acrylic resin in Example 12 was composed of LA-6099 waterborne acrylic emulsion and LA-624A waterborne acrylic resin. The results showed that the salt spray resistance and abrasion resistance of the acrylic anti-corrosion paint in Examples 9-11 were higher than those in Examples 1, 8, and 12, indicating that when the acrylic resin is composed of LA-6090B waterborne acrylic resin and LA-624A waterborne acrylic resin, the salt spray resistance and abrasion resistance of the acrylic anti-corrosion paint can be further improved.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A long-lasting, aging-resistant acrylic anti-corrosion paint, characterized in that, The raw materials comprise the following components by weight: 40-50 parts acrylic emulsion, 4-8 parts polyester resin, 4-8 parts amino resin, 3-4 parts film-forming aid, 20-25 parts modified talc, 10-12 parts solvent, and 4-5 parts additives; the modified talc is obtained by modifying talc with a modifier, the modifier being composed of 2-[(2-methoxy-4-nitrophenyl)amino]ethanol and hydroxybutyramide phenyl ether in a mass ratio of 1:2-5; the acrylic emulsion is composed of LA in a mass ratio of 1:3-7. 6090B waterborne acrylic emulsion and LA Composition of 624A waterborne acrylic emulsion.

2. The long-lasting, aging-resistant acrylic anti-corrosion paint according to claim 1, characterized in that, The amount of the modifier added is 5-8% of the mass of talc.

3. The long-lasting, aging-resistant acrylic anti-corrosion paint according to claim 1, characterized in that, The film-forming aid includes one or more of dodecyl alcohol ester, benzyl alcohol, and propylene glycol methyl ether acetate.

4. The long-lasting, aging-resistant acrylic anti-corrosion paint according to claim 1, characterized in that, The additives include one or more of the following: dispersants, defoamers, thickeners, and antisettling agents.

5. The long-lasting, aging-resistant acrylic anti-corrosion paint according to claim 4, characterized in that, The dispersant includes one or more of sodium dodecyl sulfate, triethylhexyl phosphate, and methylpentanol.

6. The long-lasting, aging-resistant acrylic anti-corrosion paint according to claim 4, characterized in that, The defoamer includes one or more of polysiloxane, fatty alcohol polyoxyethylene ether, and polyoxyethylene stearate.

7. The long-lasting, aging-resistant acrylic anti-corrosion paint according to claim 4, characterized in that, The thickener is polyacrylamide.

8. The long-lasting, aging-resistant acrylic anti-corrosion paint according to claim 4, characterized in that, The anti-settling agent includes one or more of polyamide wax, oxidized polyethylene wax, and fumed silica.

9. The production process of a long-lasting, aging-resistant acrylic anti-corrosion paint according to any one of claims 1 to 8, characterized in that, The process includes the following steps: After mixing the raw materials evenly, a long-lasting, aging-resistant acrylic anti-corrosion paint is obtained.

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