Low-cost primer-topcoat acrylic acid type water-based multifunctional coating and preparation method thereof

Abstract

The invention provides a low-cost primer-topcoat acrylic acid type water-based multifunctional coating and a preparation method thereof. The coating at least comprises the following components in parts by weight: 27-40 parts of acrylic emulsion; 4-6 parts of an auxiliary agent; 2-4 parts of a coalescing agent; 20 to 30 parts of filler; and 26-35 parts of water. According to the low-cost primer-topcoat acrylic acid type water-based multifunctional protective paint disclosed by the invention, a single-component acrylic acid modified polymer is adopted as a main film-forming substance, so that the protective paint shows certain salt spray resistance, excellent calcium ion stability, freeze-thaw stability, water resistance, mechanical stability and yellowing resistance; as water is used as a dispersion medium, the amount of volatilized organic compounds is small, an anti-rust pigment does not need to be added, heavy metal is avoided, and safety and environment friendliness are achieved; and more importantly, the coating has good anti-corrosion capability, can be directly constructed on the surfaces of various substrates, and shows good anti-corrosion protection effect and decoration effect.

Description

Technical Field

[0001] The invention relates to the technical field of acrylic acid type water-based multifunctional paint, and in particular to a low-cost bottom-and-top integrated acrylic acid type water-based multifunctional paint. Background Art

[0003] According to market research, the domestic market is still dominated by oily alkyds, PU, ​​etc., and water-based products are mostly alkyd-modified acrylics. Although they have the surface effect of enamel, they do not have anti-rust properties. At the same time, the VOC content of modified products is still very high, and a large amount of solvents are used, which is called fake water-based enamel.

[0004] In response to the above situation, we have developed a water-based multifunctional paint that does not require the addition of anti-rust pigments. It can be used on different substrates to achieve anti-corrosion and surface effects. It is simple to construct, inexpensive, and does not require a matching primer. Summary of the invention

[0005] The purpose of the present invention is to provide a low-cost bottom-and-top integrated acrylic water-based multifunctional coating and a preparation method thereof, so as to solve the problems that the existing water-based alkyd-modified acrylic enamel does not have anti-rust performance, requires a primer, has a high VOC content, and is applicable to a small range of substrates.

[0006] Another object of the present invention is to provide a method for preparing the low-cost bottom-to-top acrylic water-based multifunctional coating.

[0007] In order to achieve the above-mentioned object of the invention, the embodiment of the present invention adopts the following technical solution:

[0008] A low-cost, bottom-and-top all-in-one acrylic water-based multifunctional paint comprises at least the following components in parts by weight:

[0009]

[0010] Accordingly, an embodiment of the present invention provides a preparation method, which at least comprises the following steps:

[0011] Weigh each component according to the formula as described above;

[0012] Mixing the weighed water, dispersant, defoamer, and pH regulator to obtain a first mixed solution;

[0013] Adding the titanium dioxide, barium sulfate and talcum powder to the first mixed solution for mixing to obtain a second mixed solution;

[0014] The acrylic emulsion, covering emulsion, film-forming aid, defoamer, thickener and bactericide are added into the second mixed liquid for mixing to obtain a bottom-and-top-in-one acrylic water-based enamel paint.

[0015] The low-cost bottom-and-top integrated acrylic water-based multifunctional coating provided by the above-mentioned embodiment of the present invention is a one-component acrylic water-based multifunctional coating, which adopts acrylic polymer as a water-based modified acrylic emulsion, and exhibits good calcium ion stability, freeze-thaw stability, water whitening resistance, mechanical stability and rust resistance; and uses water as a dispersion medium, with a small amount of volatile organic compounds, which is safe and environmentally friendly; more importantly, it has good weather resistance and rust resistance, can be directly constructed on a variety of substrates, and exhibits good anti-corrosion protection and adhesion.

[0016] The method for preparing the low-cost bottom-and-top integrated acrylic water-based multifunctional coating provided by the above-mentioned embodiment of the present invention has a simple process, low equipment requirements and a short production time. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] The embodiment of the present invention provides a bottom-and-top integrated acrylic water-based enamel paint, which comprises at least the following components in parts by weight:

[0019]

[0020]

[0021] The formulation of the present invention is further explained below.

[0022] In a preferred embodiment, the acrylic emulsion uses Badford acrylic ester polymer, which has excellent calcium ion stability, freeze-thaw stability and mechanical stability. When used in the enamel, it exhibits good impact resistance, flexibility, good film-forming performance, fast drying, and excellent anti-rust protection, which can well meet the purpose of the embodiment of the present invention.

[0023] The above 3 to 5 parts of auxiliary agents include:

[0024]

[0025] Further preferably, the dispersant is a general-purpose comb-type block modified polymer dispersant; the dispersant used does not affect the gloss of the system, has good water resistance, low foaming, good stability, can reduce the amount of defoaming agent used, and is easy to operate, has good storage properties, strong dispersibility, good compatibility, good formula reproducibility, and good cost performance.

[0026] The defoamer is a silicone defoamer, which has a long-lasting defoaming ability, can prevent the paint from bubbling for a long time, and make the paint have a better appearance without problems such as residual bubbles, shrinkage holes or fish eyes.

[0027] The pH regulator is a multifunctional amine additive; the multifunctional amine additive has excellent functions such as dispersion, thickening, pH adjustment, non-discoloration, etc. It also has antimicrobial (bactericidal) properties and can also reduce the total amount of VOC (volatile organic compounds).

[0028] Anti-flash rust agent is a water-soluble corrosion inhibitor; the advantage of water-soluble corrosion inhibitor is that it can be used as a corrosion inhibitor for water-soluble coatings to prevent the formation of "flash corrosion", and can also be used as an inhibitor of tank corrosion.

[0029] The thickener is a compound of a non-ionic polyurethane rheology modifier and an alkali swelling agent; the advantages of the non-ionic polyurethane rheology modifier are excellent thickening efficiency and anti-roller splashing, excellent flow, leveling performance and covering effect, uniform film thickness and film fullness; the alkali swelling agent can provide excellent thickening efficiency.

[0030] The fungicide is an isothiazidinone fungicide; isothiazidinone fungicide, this type of fungicide does not contain formaldehyde, nor does it contain organic volatiles, and can effectively inhibit the growth of bacteria, fungi, mold and mildew.

[0031] The above-mentioned additives act synergistically under the above-mentioned proportions and exhibit good wettability as a whole, so that the obtained coating can wet various substrate surfaces well and improve the overall adhesion of the paint.

[0032] The film-forming aids are dodecyl alcohol ester and PPH. The boiling point of this type of alcohol ester is 250℃~260℃, and it has good hydrolysis stability, which is conducive to being absorbed on the emulsion particles, softening the emulsion particles and causing better fusion during the coating process.

[0033] The above 20 to 30 parts of fillers include:

[0034] 10-20 parts of titanium dioxide;

[0035] 10-20 parts of barium sulfate;

[0036] 2 to 4 parts of talcum powder.

[0037] The titanium dioxide is rutile titanium dioxide; the powder system not only has excellent properties such as good temperature resistance, acid and alkali corrosion resistance, stable chemical properties, and good weather resistance, but also can reach a fineness of 20μm or less after dispersing at a speed of 2000r / min for half an hour.

[0038] On the premise of the above-mentioned components, another preferred embodiment of the low-cost bottom-top integrated acrylic water-based multifunctional coating of the present invention comprises the following components in parts by weight:

[0039]

[0040] The low-cost bottom-and-top integrated acrylic water-based multifunctional coating provided in the above-mentioned embodiment of the present invention is a one-component acrylic water-based multifunctional coating, which adopts acrylic polymer as a water-based modified acrylic emulsion, and exhibits good calcium ion stability, freeze-thaw stability, water whitening resistance, mechanical stability and rust resistance; and uses water as a dispersion medium, with a small amount of volatile organic compounds, which is safe and environmentally friendly; more importantly, it has good weather resistance and rust resistance, and can be directly applied on a variety of metal surfaces, showing good rust resistance and adhesion.

[0041] Accordingly, the embodiment of the present invention provides a method for preparing the low-cost bottom-top and bottom-top acrylic water-based multifunctional coating based on the formula of the low-cost bottom-top and bottom-top acrylic water-based multifunctional coating.

[0042] In one embodiment, the method for preparing the low-cost bottom-to-top acrylic water-based multifunctional coating comprises at least the following steps:

[0043] Weigh each component according to the formula as described above;

[0044] Mixing the weighed water, dispersant, defoamer, and pH regulator to obtain a first mixed solution;

[0045] Adding the titanium dioxide into the first mixed solution and mixing them to obtain a second mixed solution;

[0046] The acrylic emulsion, covering emulsion, film-forming aid, defoamer, thickener and fungicide are added into the second mixed liquid for mixing to obtain a bottom-and-top all-in-one acrylic water-based multifunctional coating.

[0047] When the above-mentioned first mixed liquid is mixed, it is dispersed at a stirring speed of 800-1200 r / min for 10-15 minutes; when forming the second mixed liquid, it is dispersed at a stirring speed of 2000-2500 r / min for 15-25 minutes; when the first mixed liquid and the second mixed liquid are mixed, they are dispersed at a stirring speed of 800-1200 r / min for 10-15 minutes.

[0048] The low-cost method for preparing the bottom-and-top integrated acrylic water-based multifunctional coating provided by the embodiment of the present invention has a simple process, low equipment requirements, and a short production time, which is conducive to improving the production efficiency of the coating.

[0049] Furthermore, the present invention, on the basis of providing the above-mentioned low-cost bottom-and-top all-in-one acrylic water-based multifunctional coating formula and its preparation method, also provides a method for using the low-cost bottom-and-top all-in-one acrylic water-based multifunctional coating, which is particularly suitable for the surfaces of various substrates such as outdoor iron railings, galvanized ventilation pipes, drainage pipes, PVC pipes, outdoor protective wood, etc.

[0050] Specifically, during use, the low-cost bottom-to-top acrylic water-based multifunctional paint needs to be diluted with a diluent to meet the requirements of brushing, spraying, etc. for paint viscosity. It is generally diluted according to the weight ratio of paint: diluent = 100:10.

[0051] Preferably, the diluent is deionized water.

[0052] In order to better illustrate the technical solution of the present invention, the formulation of the present invention is further described below through a plurality of specific embodiments.

[0053] Example 1

[0054] Example 1 The raw material formula weight percentage of the low-cost bottom-to-top integrated acrylic water-based multifunctional coating is listed in Table 1, as follows.

[0055] Table 1 Weight parts of the components of Example 1

[0056] Components Weight Components Weight water 41.2 Acrylic Emulsion 27 Dispersants 0.33 Concealing lotion 4 Defoaming agent 0.19 Film-forming aids 2 pH Adjuster 0.18 Anti-flash rust agent 1.5 Titanium dioxide 14 Thickener 1 Barium sulfate 9.5 Fungicides 0.1 talcum powder 3.5

[0057] The preparation process of the low-cost bottom-to-top integrated acrylic water-based multifunctional coating in the above-mentioned embodiment 1 is as follows:

[0058] Weigh each component according to the formula shown in Table 1, add 15.2 kg of water, 0.2 kg of thickener, 0.33 kg of dispersant, 0.15 kg of defoamer, and 0.05 kg of pH regulator in sequence at a speed of 800 r / min, and disperse at a stirring speed of 1200 r / min for 10 min to obtain a first mixed solution;

[0059] Add 14 kg titanium dioxide, 9.5 kg barium sulfate, and 3.5 kg talc to the first mixed solution; disperse at a stirring speed of 2000 r / min for 20 minutes to obtain a second mixed solution;

[0060] The 27 kg acrylic emulsion, 4 kg covering emulsion, 2 kg film-forming aid, the remaining 26 kg water, 0.05 kg defoamer, and 0.13 kg pH regulator were added to the second mixed liquid, dispersed at a stirring speed of 800 r / min for 5 min, and then 0.8 kg thickener and 0.1 kg fungicide were added at a stirring speed of 1200 r / min, and stirring was continued for 5 min to obtain the coating required in Example 1.

[0061] Example 2

[0062] Example 2 The raw material formula weight percentage of the low-cost bottom-to-top integrated acrylic water-based multifunctional coating is listed in Table 2, as follows.

[0063] Table 2 Weight parts of the components of Example 2

[0064] Components Weight Components Weight water 39.2 Acrylic Emulsion 30 Dispersants 0.43 Concealing lotion 4 Defoaming agent 0.19 Film-forming aids 4 pH Adjuster 0.16 Anti-flash rust agent 1.5 Titanium dioxide 16 Thickener 1 Barium sulfate 8.5 Fungicides 0.1 talcum powder 4

[0065] The preparation process of the low-cost bottom-to-top integrated acrylic water-based multifunctional coating in the above-mentioned embodiment 2 is as follows:

[0066] Weigh each component according to the formula shown in Table 2, add 15.2 kg of water, 0.2 kg of thickener, 0.33 kg of dispersant, 0.15 kg of defoamer, and 0.05 kg of pH regulator in sequence at a speed of 800 r / min, and disperse at a stirring speed of 1200 r / min for 10 min to obtain a first mixed solution;

[0067] Add 14 kg titanium dioxide, 9.5 kg barium sulfate, and 3.5 kg talc to the first mixed solution; disperse at a stirring speed of 2000 r / min for 20 minutes to obtain a second mixed solution;

[0068] The 27 kg acrylic emulsion, 4 kg covering emulsion, 2 kg film-forming aid, the remaining 24 kg water, 0.05 kg defoamer, and 0.13 kg pH regulator were added to the second mixed liquid, dispersed at a stirring speed of 800 r / min for 5 min, and then 0.8 kg thickener and 0.1 kg fungicide were added at a stirring speed of 1200 r / min, and stirring was continued for 5 min to obtain the coating required in Example 1.

[0069] Example 3

[0070] The weight percentages of the raw material formula of the bottom-to-top integrated acrylic water-based enamel paint of Example 3 are listed in Table 3, as follows.

[0071] Table 3 Weight parts of the formulation components of Example 3

[0072] Components Weight Components Weight water 43.2 Acrylic Emulsion 26 Dispersants 0.33 Concealing lotion 4 Defoaming agent 0.19 Film-forming aids 2 pH Adjuster 0.18 Anti-flash rust agent 1.5 Titanium dioxide 14 Thickener 1 Barium sulfate 9.5 Fungicides 0.1 talcum powder 3.5

[0073] The preparation process of the low-cost bottom-to-top integrated acrylic water-based multifunctional coating in the above-mentioned embodiment 3 is as follows:

[0074] Weigh each component according to the formula shown in Table 3, add 15.2 kg of water, 0.2 kg of thickener, 0.33 kg of dispersant, 0.15 kg of defoamer, and 0.05 kg of pH regulator in sequence at a speed of 800 r / min, and disperse at a stirring speed of 1200 r / min for 10 min to obtain a first mixed solution;

[0075] Add 14 kg titanium dioxide, 9.5 kg barium sulfate, and 3.5 kg talc to the first mixed solution; disperse at a stirring speed of 2000 r / min for 20 minutes to obtain a second mixed solution;

[0076] The 27 kg acrylic emulsion, 4 kg covering emulsion, 2 kg film-forming aid, the remaining 28 kg water, 0.05 kg defoamer, and 0.13 kg pH regulator were added to the second mixed liquid, dispersed at a stirring speed of 800 r / min for 5 min, and then 0.8 kg thickener and 0.1 kg fungicide were added at a stirring speed of 1200 r / min, and stirring was continued for 5 min to obtain the coating required in Example 1.

[0077] Example 4

[0078] Example 4 The raw material formula weight percentage of the low-cost bottom-to-top integrated acrylic water-based multifunctional coating is listed in Table 3, as follows.

[0079] Table 4 Weight parts of the formulation components of Example 4

[0080] Components Weight Components Weight water 36.2 Acrylic Emulsion 32 Dispersants 0.33 Concealing lotion 4 Defoaming agent 0.19 Film-forming aids 2 pH Adjuster 0.18 Anti-flash rust agent 1.5 Titanium dioxide 14 Thickener 1 Barium sulfate 9.5 Fungicides 0.1 talcum powder 3.5

[0081] The preparation process of the low-cost bottom-to-top integrated acrylic water-based multifunctional coating in the above-mentioned embodiment 4 is as follows:

[0082] Weigh each component according to the formula shown in Table 1, add 15.2 kg of water, 0.2 kg of thickener, 0.33 kg of dispersant, 0.15 kg of defoamer, and 0.05 kg of pH regulator in sequence at a speed of 800 r / min, and disperse at a stirring speed of 1200 r / min for 10 min to obtain a first mixed solution;

[0083] Add 14 kg titanium dioxide, 9.5 kg barium sulfate, and 3.5 kg talc to the first mixed solution; disperse at a stirring speed of 2000 r / min for 20 minutes to obtain a second mixed solution;

[0084] The 27 kg acrylic emulsion, 4 kg covering emulsion, 2 kg film-forming aid, the remaining 21 kg water, 0.05 kg defoamer, and 0.13 kg pH regulator were added to the second mixed liquid, dispersed at a stirring speed of 800 r / min for 5 min, and then 0.8 kg thickener and 0.1 kg fungicide were added at a stirring speed of 1200 r / min, and stirring was continued for 5 min to obtain the coating required in Example 1.

[0085] In order to better illustrate the properties of the low-cost bottom-to-top acrylic water-based multifunctional coating obtained in Examples 1 to 4, the obtained coating was subjected to performance tests. The test results are shown in Table 5.

[0086] Table 5 Basic performance test results of Examples 1 to 4

[0087]

[0088] It can be seen from Table 5 that the invention has certain resistance to artificial aging and excellent water resistance, good adhesion to different substrates, and the basic properties of the paint film meet the test requirements of HG / T 4758-2014.

[0089] When preparing the samples, the weight parts of the acrylic emulsion are changed while the other components are fixed (specifically, the weight parts of the other components are: 0.33 parts of dispersant; 0.2 parts of defoamer; 0.18 parts of pH regulator; 14 parts of titanium dioxide; 9.5 parts of barium sulfate; 3.5 parts of talc; 4 parts of covering emulsion; 2 parts of film-forming aid; 1.5 parts of anti-flash rust agent; 0.24 parts of defoamer; 1 part of thickener; 0.1 parts of bactericide) to examine the effect of the acrylic emulsion on the performance of the low-cost water-based multifunctional coating of the embodiment of the present invention.

[0090] In summary, the performance of the product increases with the addition amount of acrylic emulsion, and the increase in the addition amount has little effect on the product performance; considering the cost and actual production situation, the addition amount of acrylic emulsion is about 27 parts, which has the best economic benefit.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Low-cost bottom-to-top acrylic water-based multifunctional paint, characterized by: At least include the following components in parts by weight:

2. The low-cost bottom-to-top acrylic water-based multifunctional paint according to claim 1, characterized in that: The 4 to 6 parts of auxiliary agents include:

3. The low-cost bottom-to-top acrylic water-based multifunctional paint according to claim 1, characterized in that: The 20 to 30 parts of fillers include: 10-20 parts of titanium dioxide; 10-20 parts of barium sulfate; 2 to 4 parts of talcum powder.

4. The low-cost bottom-to-top acrylic water-based multifunctional paint according to claim 1, characterized in that: The emulsion is a single-component acrylic modified polymer emulsion. The emulsion adopts a special emulsion synthesis technology, which can effectively improve the binding force between the emulsion and the pigment and the adhesion between the emulsion and various substrates, forming a very dense protective paint film, which can effectively prevent water from penetrating the paint film; the paint film has certain salt spray resistance and excellent water resistance, weather resistance and other properties to protect the substrate from being corroded by the outside world and provide good decorative performance.

5. The low-cost bottom-to-top acrylic water-based multifunctional paint according to claim 1, characterized in that: The covering emulsion is a hollow microbead polymer emulsion.

6. The low-cost bottom-to-top acrylic water-based multifunctional paint according to claim 2, characterized in that: The defoamer is a defoamer for brushing and spraying.

7. The low-cost bottom-to-top acrylic water-based multifunctional paint according to claim 2, characterized in that: The anti-flash rust agent is a water-based anti-flash rust auxiliary agent.

8. The low-cost bottom-to-top acrylic water-based multifunctional paint according to claim 2, characterized in that: The thickener is at least one of non-ionic polyurethane rheology modifiers.

9. The low-cost bottom-to-top acrylic water-based multifunctional paint according to any one of claims 1 to 8, characterized in that: At least the following components are included in parts by weight 10. A low-cost bottom-to-top acrylic water-based multifunctional paint, comprising at least the following steps: Weigh each component according to any one of claims 1 to 8; Mixing the weighed water, dispersant, defoamer, and pH regulator to obtain a first mixed solution; Adding the titanium dioxide, barium sulfate and talcum powder to the first mixed solution for mixing to obtain a second mixed solution; The acrylic emulsion, covering emulsion, film-forming aid, defoamer, thickener and fungicide are added to the second mixed liquid for mixing to obtain a low-cost bottom-and-top all-in-one acrylic water-based multifunctional coating.

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