Acrylic resin coating and preparation method thereof, resin coating and coating product

Abstract

The invention relates to an acrylic resin coating and a preparation method thereof, a resin coating and a coating product. The acrylic resin coating comprises a component A and a component B, the component A is prepared from the following components in parts by mass: 15 to 30 parts of thermosetting acrylic resin, 8 to 24 parts of extinction type acrylic resin, 1 to 3 parts of anti-sagging resin, 0.5 to 4 parts of amino resin, 1 to 2 parts of silicon dioxide, 0.1 to 1 part of catalyst and 29 to 43 parts of first solvent; the hydroxyl value of the thermosetting acrylic resin is 140 mgKOH / g to 160 mgKOH / g; and the component B comprises the following components in parts by mass: 10-20 parts of a curing agent and 2-5 parts of a second solvent. The acrylic resin coating is relatively good in storage stability and relatively long in service life; the resin coating prepared by mixing and curing the component A and the component B has good gloss stability, and also has good mechanical properties, impact resistance, aging resistance and chemical resistance.

Description

Technical Field

[0001] The present application relates to the field of coating technology, and in particular to an acrylic resin coating and a preparation method thereof, a resin coating and a coating product. Background Art

[0002] In the field of automobile manufacturing technology, the quality of automobile body coatings directly affects the appearance and performance of the car. Among them, matte varnish is a special effect coating that can provide a gloss different from that of high-gloss paint, making the surface of the car body look more low-key and rich in texture. Traditional matte varnish for automobile bodies generally adopts the method of adding paraffin powder, polyolefin powder, and silica matting powder to achieve matte. However, the storage stability and gloss stability of traditional matte varnish with matting powder are poor.

[0003] Therefore, it is necessary to improve the traditional technology. Summary of the invention

[0004] Based on this, the present application provides an acrylic resin coating with good stability and a preparation method thereof, a resin coating and a coating product.

[0005] The technical solution of this application to solve the above technical problems is as follows.

[0006] On the one hand, the present application provides an acrylic resin coating, including component A and component B;

[0007] The component A comprises the following components by weight: 15 to 30 parts of a thermosetting acrylic resin, 8 to 24 parts of a matte acrylic resin, 1 to 3 parts of an anti-sagging resin, 0.5 to 4 parts of an amino resin, 1 to 2 parts of silicon dioxide, 0.1 to 1 parts of a catalyst, and 29 to 43 parts of a first solvent; the hydroxyl value of the thermosetting acrylic resin is 140 mgKOH / g to 160 mgKOH / g;

[0008] In parts by mass, the B component includes 10 to 20 parts of a curing agent and 2 to 5 parts of a second solvent.

[0009] In some of the embodiments, in the acrylic resin coating, the mass ratio of the matte acrylic resin to the thermosetting acrylic resin is 0.3-1.4:1.

[0010] In some of the embodiments, in the acrylic resin coating, the mass ratio of the silicon dioxide to the thermosetting acrylic resin is 0.05-0.1:1.

[0011] In some of the embodiments, in the acrylic resin coating, the viscosity of the thermosetting acrylic resin is 1000 mpa·s to 4000 mpa·s.

[0012] In some of the embodiments, in the acrylic resin coating, the weight average molecular weight of the thermosetting acrylic resin is 4000-8000.

[0013] In some of the embodiments, in the acrylic resin coating, the solid content of the thermosetting acrylic resin is 65 wt % to 75 wt %.

[0014] In some of the embodiments, in the acrylic resin coating, the thermosetting acrylic resin includes at least one of SA-7000, KH-550 and ACR6750A.

[0015] In some of the embodiments, in the acrylic resin coating, the matte acrylic resin includes at least one of Hypomer MT-2550K, Hypomer MT-2350 and Hypomer MT-2550F.

[0016] In some of the embodiments, in the acrylic resin coating, the amino resin includes methyl and butyl etherified melamine formaldehyde resin; optionally, the amino resin includes CY 238.

[0017] In some of the embodiments, in the acrylic resin coating, the anti-sagging resin includes a polyurea compound modified thermosetting acrylic resin; optionally, the content of the polyurea compound in the polyurea compound modified thermosetting acrylic resin is 5 wt%~10 wt%; optionally, the anti-sagging resin includes BTZ10-KH393.

[0018] In some of the embodiments, in the acrylic resin coating, the catalyst includes a phosphoric acid catalyst; optionally, the catalyst includes Nacure-4167.

[0019] In some of the embodiments, in the acrylic resin coating, the silica comprises fumed silica; optionally, the silica comprises Acematt 3400.

[0020] In some of the embodiments, in the acrylic resin coating, in the component A, the first solvent includes 1 to 3 parts of an alcohol solvent and 28 to 40 parts of an ester solvent, calculated by weight; optionally, the alcohol solvent includes at least one of n-butanol, isobutanol and isooctyl alcohol; optionally, the ester solvent includes at least two of a first ester solvent, a second ester solvent and a third ester solvent, the boiling point of the first ester solvent is lower than that of the second ester solvent, and the boiling point of the second ester solvent is lower than that of the third ester solvent; optionally, the first ester solvent includes butyl acetate, the second ester solvent includes ethyl 3-ethoxypropionate, and the third ester solvent includes at least one of DBE, ethylene glycol butyl acetate and tetramethylbenzene.

[0021] In some of the embodiments, in the acrylic resin coating, the component A further comprises at least one of a leveling agent, an ultraviolet absorber, a light stabilizer and an anti-sagging agent.

[0022] In some of the embodiments, in the acrylic resin coating, the component A further comprises, by weight, 0.2 to 1 part of a leveling agent, 0.5 to 1.5 parts of an ultraviolet absorber, 0.2 to 1 part of a light stabilizer, and 1 to 3 parts of an anti-sagging agent.

[0023] In some of the embodiments, in the acrylic resin coating, the leveling agent includes an acrylic silicone copolymer; optionally, the leveling agent includes DISPARLON NSU-8853.

[0024] In some of the embodiments, in the acrylic resin coating, the UV absorber includes a triazine UV absorber; optionally, the UV absorber includes Tinuvin 400.

[0025] In some of the embodiments, in the acrylic resin coating, the light stabilizer includes a hindered amine light stabilizer; optionally, the hindered amine light stabilizer includes N-(1-acetyl-2,2,6,6-tetramethyl-4-piperidinyl)-2-dodecylsuccinimide.

[0026] In some embodiments, in the acrylic resin coating, the anti-sagging agent includes NT-200.

[0027] In some of the embodiments, in the acrylic resin coating, the curing agent includes an isocyanate curing agent; optionally, the NCO value of the isocyanate curing agent is 20-30.

[0028] In some of the embodiments, in the acrylic resin coating, the viscosity of the curing agent is 500 mpa·s to 4000 mpa·s.

[0029] In some of the embodiments, in the acrylic resin coating, the weight average molecular weight of the curing agent is 1500-8000.

[0030] In some embodiments, in the acrylic resin coating, the second solvent includes an ester solvent.

[0031] In some of the embodiments, in the acrylic resin coating, the mass ratio of the component A to the component B is 100:15-22.

[0032] On the one hand, the present application provides a method for preparing an acrylic resin coating, comprising the following steps:

[0033] Providing raw materials according to the acrylic resin coating;

[0034] Mixing the raw materials corresponding to the A component to obtain the A component;

[0035] The raw materials corresponding to the B component are mixed to obtain the B component.

[0036] On one hand, the present application provides a resin coating, the raw material of which includes the above-mentioned acrylic resin coating.

[0037] In one aspect, the present application provides a coated product comprising the above-mentioned resin coating.

[0038] The acrylic resin coating of the present application has the following beneficial effects:

[0039] The acrylic resin coating of the present application includes component A and component B. Component A combines matte acrylic resin and silicon dioxide with thermosetting acrylic resin, anti-sagging resin and amino resin, and controls the hydroxyl value of the thermosetting acrylic resin. It has good storage stability and effectively improves the service life of the acrylic resin coating. The resin coating obtained by mixing and curing component A and component B has good gloss stability, and also has good mechanical properties, impact resistance, aging resistance and chemical resistance. DETAILED DESCRIPTION

[0040] The present application will be further described in detail below in conjunction with the embodiments and examples. It should be understood that these embodiments and examples are only used to illustrate the present application and are not used to limit the scope of the present application. The purpose of providing these embodiments and examples is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0041] It should also be understood that the present application can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various changes or modifications without violating the connotation of the present application, and the equivalent forms obtained also fall within the scope of protection of the present application. For example, the features illustrated or described as part of one embodiment can be combined in another embodiment in a suitable manner to produce a new embodiment. In addition, in the description below, a large number of specific details are given in order to provide a more comprehensive understanding of the present application. It should be understood that the present application can be implemented without one or more of these details.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing implementation modes and embodiments and are not intended to limit this application.

[0043] Unless otherwise specified or incompatible herewith, the terms and phrases used herein shall have the following meanings:

[0044] In the present application, "plurality", "multiple", "multiple times", etc., unless otherwise specified, refer to a quantity greater than 2 or equal to 2. For example, "one or more" means one or greater than or equal to two.

[0045] As used herein, "combination thereof", "any combination thereof", "any combination thereof" etc. include all suitable combinations of any two or more of the listed items.

[0046] Herein, the “suitable” mentioned in “suitable combination”, “suitable method”, “any suitable method”, etc., shall be based on the ability to implement the technical solution of this application, solve the technical problems of this application, and achieve the expected technical effects of this application.

[0047] Herein, "preferred", "better", "more preferred", and "suitable" are only used to describe implementation methods or examples with better effects, and it should be understood that they do not constitute a limitation on the scope of protection of this application. If multiple "preferred" items appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "preferred" item is independent.

[0048] In the present application, "further", "further", "particularly" and the like are used for descriptive purposes to indicate differences in content, but should not be construed as limiting the scope of protection of the present application.

[0049] In this application, "optionally", "optional", and "optional" mean optional or dispensable, that is, any one of the two parallel schemes of "yes" or "no". If multiple "options" appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent.

[0050] In the present application, the terms "first", "second", "third", "fourth", etc. in "the first aspect", "the second aspect", "the third aspect", "the fourth aspect", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation on quantity.

[0051] In the present application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0052] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum value and the maximum value) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to the integers in the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical range disclosed herein should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows broadly including numerical interval types such as percentage intervals, ratio intervals, and ratio intervals.

[0053] The temperature parameters in this application, unless otherwise specified, are allowed to be either constant temperature treatment or to vary within a certain temperature range. It should be understood that the constant temperature treatment allows the temperature to fluctuate within the accuracy range controlled by the instrument. Fluctuations within the range of ±5°C, ±4°C, ±3°C, ±2°C, and ±1°C are allowed.

[0054] In this application, the term "room temperature" or "normal temperature" generally refers to 4°C to 35°C, for example, 20°C ± 5°C. In some embodiments of this application, "room temperature" or "normal temperature" refers to 10°C to 30°C. In some embodiments of this application, "room temperature" or "normal temperature" refers to 20°C to 30°C.

[0055] In this application, when referring to the unit of a data range, if there is a unit only after the right endpoint, it means that the units of the left and right endpoints are the same. For example, 3~5 h means that the units of the left endpoint "3" and the right endpoint "5" are both h (hours).

[0056] All documents mentioned in this application are cited as references in this application, just as each document is cited as reference separately. Unless they conflict with the invention purpose and / or technical solution of this application, the cited documents involved in this application are cited with all contents and all purposes. When the cited documents are involved in this application, the definitions of relevant technical features, terms, nouns, phrases, etc. in the cited documents are also cited. When the cited documents are involved in this application, the examples and preferred methods of the cited relevant technical features can also be incorporated into this application as references, but are limited to the implementation of this application. It should be understood that when the cited content conflicts with the description in this application, the present application shall prevail or be modified adaptively according to the description of this application.

[0057] The mass or weight of the relevant components mentioned in the specification of the embodiments of the present application may not only refer to the specific content of each component, but also indicate the proportional relationship of the mass or weight between the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the specification of the embodiments of the present application, it is within the scope disclosed in the specification of the embodiments of the present application. Specifically, the mass or weight described in the specification of the embodiments of the present application may be units known in the chemical industry such as μg, mg, g, and kg.

[0058] The mechanism of matte coating is that light shines on the surface of the coating and specular reflection occurs on the high-gloss surface. As the surface roughness increases, the reflected light is scattered to non-specular angles, and the gloss becomes lower. The surface of the coating is a micron-level rough structure, and this microscopic structure produces a matte effect.

[0059] Matting powders such as paraffin powder, polyolefin powder and silica lamp used in traditional matte varnish for automobile bodies are exposed on the surface, which has the following disadvantages: matting powder is easy to flocculate in the varnish and has poor storage stability, which can easily shorten the service life of the coating; the migration of matting powder to the surface of the coating is greatly affected by the external environment and construction conditions, the matte effect is very unstable, and the gloss stability is poor; the first-time pass rate of the paint film is low, and rework is often required, which increases production costs and waste of resources; the physical properties are poor. Since a large amount of matting powder is exposed on the surface of the coating, it is easy to fall off due to external force or erosion by chemical substances, resulting in a decline in the quality of the coating, thereby affecting consumer satisfaction.

[0060] An embodiment of the present application provides an acrylic resin coating, including component A and component B;

[0061] Component A includes the following components by weight: 15-30 parts of thermosetting acrylic resin, 8-24 parts of matte acrylic resin, 1-3 parts of anti-sagging resin, 0.5-4 parts of amino resin, 1-2 parts of silicon dioxide, 0.1-1 parts of catalyst and 29-43 parts of first solvent; the hydroxyl value of the thermosetting acrylic resin is 140 mgKOH / g-160 mgKOH / g;

[0062] Calculated by weight, component B includes 10 to 20 parts of a curing agent and 2 to 5 parts of a second solvent.

[0063] The above-mentioned acrylic resin coating includes component A and component B. Component A combines matte acrylic resin and silica with thermosetting acrylic resin, anti-sagging resin and amino resin, and controls the hydroxyl value of the thermosetting acrylic resin. It has good storage stability and effectively improves the service life of the acrylic resin coating. The resin coating obtained by mixing and curing component A and component B has good gloss stability, and also has good mechanical properties, impact resistance, aging resistance and chemical resistance.

[0064] The organic matting particles inside the matting acrylic resin are stably distributed in the resin. At the same time, the liquid resin part outside the matting acrylic resin has good miscibility with other components such as thermosetting acrylic resin, which effectively improves the storage stability and thus improves the service life of the acrylic resin coating.

[0065] The resin coating formed by the acrylic resin coating has the surface of organic matting particles surrounded by acrylic resin, which is evenly distributed in the inner and outer layers and interacts with other components, and is less affected by the external environment and construction conditions. The varnish layer used for the car body presents a matte effect. For the complex structure of the car body, the gloss fluctuation caused by the difference in film thickness and atomization in the parts is small, and the gloss stability is good, which solves the poor stability and poor physical properties of the traditional car body matte varnish, and meets the characteristics of high decorativeness, high physical properties and workability of the car body coating.

[0066] The above acrylic resin coating has organic matting particles distributed inside the resin coating, which interact with other components and are not easily peeled off by external forces or corroded by chemical substances. The product has good mechanical properties and chemical resistance.

[0067] It can be understood that, in component A, the thermosetting acrylic resin includes but is not limited to 15-30 parts by mass; the matte acrylic resin includes but is not limited to 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts; the anti-sagging resin includes but is not limited to 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3 parts; amino resins include but are not limited to 0.5 parts, 0.6 parts, 0.8 parts, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3 parts, 3.1 parts, 3.2 parts, 3.3 parts, 3.4 parts, 3.5 parts, 3.6 parts, 3.7 parts, 3.8 parts, 3.9 parts, 4 parts; Silicon oxide includes but is not limited to 1 part, 1.1 part, 1.2 part, 1.3 part, 1.4 part, 1.5 part, 1.6 part, 1.7 part, 1.8 part, 1.9 part, and 2 parts; the catalyst includes but is not limited to 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, and 1 part; the first solvent includes but is not limited to 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, and 43 parts; in component B, the curing agent includes but is not limited to 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts; the second solvent includes but is not limited to 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3 parts, 3.1 parts, 3.2 parts, 3.3 parts, 3.4 parts, 3.5 parts, 3.6 parts, 3.7 parts, 3.8 parts, 3.9 parts, 4 parts, 4.1 parts, 4.2 parts, 4.3 parts, 4.4 parts, 4.5 parts, 4.6 parts, 4.7 parts, 4.8 parts, 4.9 parts, 5 parts. In some examples, any two of these point values ​​can be used as the range of end values, the same below.

[0068] Further, the hydroxyl value of the thermosetting acrylic resin includes but is not limited to 140 mgKOH / g, 141 mgKOH / g, 142 mgKOH / g, 143 mgKOH / g, 144 mgKOH / g, 145 mgKOH / g, 146 mgKOH / g, 147 mgKOH / g, 148 mgKOH / g, 149 mgKOH / g, 150 mgKOH / g, 151 mgKOH / g, 152 mgKOH / g, 153 mgKOH / g, 154 mgKOH / g, 155 mgKOH / g, 156 mgKOH / g, 157 mgKOH / g, 158 mgKOH / g, 159 mgKOH / g, and 160 mgKOH / g.

[0069] In some of the examples, in the acrylic resin coating, the mass ratio of the matte acrylic resin to the thermosetting acrylic resin is 0.3~1.4:1.

[0070] It can be understood that the mass ratio of the matte acrylic resin to the thermosetting acrylic resin includes but is not limited to 0.3:1, 0.4:1, 0.5:1, 0.6:1, 0.7:1, 0.8:1, 0.9:1, 1.0:1, 1.1:1, 1.2:1, 1.3:1, and 1.4:1.

[0071] In some of the embodiments, in the acrylic resin coating, the mass ratio of silicon dioxide to thermosetting acrylic resin is 0.05-0.1:1.

[0072] It will be appreciated that the mass ratio of silica to thermosetting acrylic resin includes but is not limited to 0.05:1, 0.052:1, 0.055:1, 0.058:1, 0.06:1, 0.062:1, 0.064:1, 0.066:1, 0.068:1, 0.07:1, 0.072:1, 0.074:1, 0.076:1, 0.078:1, 0.08:1, 0.082:1, 0.084:1, 0.086:1, 0.088:1, 0.09:1, 0.092:1, 0.094:1, 0.096:1, 0.098:1, and 0.1:1.

[0073] In some of these examples, in acrylic resin coatings, the viscosity of the thermosetting acrylic resin is 1000 mPa·s~4000 mPa·s.

[0074] It will be appreciated that the viscosity of the thermosetting acrylic resin includes but is not limited to 1000 mpa·s, 1200 mpa·s, 1400 mpa·s, 1600 mpa·s, 1800 mpa·s, 2000 mpa·s, 2200 mpa·s, 2400 mpa·s, 2600 mpa·s, 2800 mpa·s, 3000 mpa·s, 3200 mpa·s, 3400 mpa·s, 3600 mpa·s, 3800 mpa·s, and 4000 mpa·s.

[0075] In some of the examples, in the acrylic resin coating, the weight average molecular weight of the thermosetting acrylic resin is 4000-8000.

[0076] It will be appreciated that the weight average molecular weight of the thermosetting acrylic resin includes, but is not limited to, 4000, 4500, 5000, 5500, 6000, 6500, 7000, 7500, and 8000.

[0077] In some of these examples, the solid content of the thermosetting acrylic resin in the acrylic resin coating is 65 wt%~75wt%.

[0078] It will be appreciated that the solid content of the thermosetting acrylic resin includes, but is not limited to, 65 wt%, 66 wt%, 67 wt%, 68 wt%, 69 wt%, 70 wt%, 71 wt%, 72 wt%, 73 wt%, 74 wt%, and 75 wt%.

[0079] In some of the examples, in the acrylic resin coating, the thermosetting acrylic resin includes at least one of SA-7000 (Hunan Xiangjiang Kansai Paint Co., Ltd.), KH-550 (Hunan Xiangjiang Kansai Paint Co., Ltd.), and ACR6750A (Tongde Chemical).

[0080] It can be understood that the matte acrylic resin is polymerized into a liquid resin soluble in a solvent and a solid resin insoluble in a solvent through a polymerization reaction.

[0081] In some of the examples, in the acrylic resin coating, the matte type acrylic resin includes at least one of Hypomer MT-2550K, Hypomer MT-2350, and Hypomer MT-2550F (Hemmings Company).

[0082] In some of these examples, in the acrylic resin coating, the amino resin includes methyl and butyl etherified melamine formaldehyde resins; alternatively, the amino resin includes CY 238 (allnex resin).

[0083] In some of these examples, in acrylic resin coatings, the anti-sagging resin includes a thermosetting acrylic resin modified with a polyurea compound.

[0084] Optionally, the content of the polyurea compound in the polyurea compound-modified thermosetting acrylic resin is 5 wt % to 10 wt %.

[0085] It can be understood that the content of the polyurea compound in the polyurea compound-modified thermosetting acrylic resin includes but is not limited to 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, and 10 wt%.

[0086] In some of the examples, in the acrylic resin coating, the anti-sagging resin includes BTZ10-KH393 (Hunan Xiangjiang Guanxi Paint Co., Ltd.). Further, the solid content of BTZ10-KH393 is 50% (50% BTZ10-KH393).

[0087] In some of these examples, in acrylic resin coatings, the catalyst includes a phosphoric acid-based catalyst.

[0088] Optionally, the catalyst comprises Nacure-4167 (King's Industries).

[0089] In some of these examples, in acrylic resin coatings, the silica includes fumed silica.

[0090] Optionally, the silica comprises Acematt 3400 (Evonik Chemicals).

[0091] In some of the examples, in the acrylic resin coating, in component A, the first solvent includes 1 to 3 parts of an alcohol solvent and 28 to 40 parts of an ester solvent, calculated by weight.

[0092] It can be understood that in component A, by mass, alcohol solvents include but are not limited to 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, and 3 parts; ester solvents include but are not limited to 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, and 40 parts.

[0093] Optionally, the alcohol solvent includes at least one of n-butanol, isobutanol and isooctyl alcohol.

[0094] Furthermore, the ester solvent includes at least two of a first ester solvent, a second ester solvent and a third ester solvent, the first ester solvent has a lower boiling point than the second ester solvent, and the second ester solvent has a lower boiling point than the third ester solvent.

[0095] For example, in some examples, the ester solvent includes a second ester solvent and a third ester solvent; in other examples, the ester solvent includes a first ester solvent, a second ester solvent, and a third ester solvent.

[0096] In some of the examples, the boiling point of the first ester solvent is 80°C to 140°C, the boiling point of the second ester solvent is 140°C to 170°C, and the boiling point of the third ester solvent is 160°C to 230°C.

[0097] Optionally, the first ester solvent includes butyl acetate.

[0098] Optionally, the second ester solvent includes ethyl 3-ethoxypropionate.

[0099] Optionally, the third ester solvent includes at least one of DBE (high boiling point solvent mixed dibasic acid ester), ethylene glycol butyl ether acetate and tetramethylbenzene.

[0100] In some of the examples, in the acrylic resin coating, component A further comprises at least one of a leveling agent, a UV absorber, a light stabilizer and an anti-sagging agent.

[0101] In some of the examples, in the acrylic resin coating, component A also includes, by weight, 0.2 to 1 part of a leveling agent, 0.5 to 1.5 parts of a UV absorber, 0.2 to 1 part of a light stabilizer, and 1 to 3 parts of an anti-sagging agent.

[0102] It can be understood that in component A, by weight, the leveling agent includes but is not limited to 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, and 1 part; the ultraviolet absorber includes but is not limited to 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, and 1.5 parts; the light stabilizer includes but is not limited to 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts; anti-sagging aids include but are not limited to 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3 parts.

[0103] In some of these examples, in acrylic resin coatings, the leveling agent includes an acrylic silicone copolymer.

[0104] Optionally, the leveling agent includes DISPARLON NSU-8853 (Kusumoto Chemicals (Japan) Co., Ltd.).

[0105] In some of these examples, in acrylic resin coatings, the UV absorber includes a triazine type UV absorber.

[0106] Optionally, the UV absorber includes Tinuvin 400 (BASF (Germany) AG).

[0107] In some of these examples, in acrylic resin coatings, the light stabilizer includes a hindered amine light stabilizer.

[0108] Alternatively, the hindered amine light stabilizer includes N-(1-acetyl-2,2,6,6-tetramethyl-4-piperidinyl)-2-dodecylsuccinimide.

[0109] Alternatively, the hindered amine light stabilizer includes Sanduvor 3058 (Clariant (Switzerland)).

[0110] In some of these examples, in acrylic resin coatings, the anti-sagging aid includes a non-aqueous dispersible resin.

[0111] In some of these examples, in acrylic resin coatings, the anti-sagging additive includes NT-200 (Hunan Xiangjiang Guanxi Paint Co., Ltd.).

[0112] In some of these examples, in acrylic resin coatings, the curing agent includes an isocyanate curing agent.

[0113] Optionally, the NCO value of the isocyanate curing agent is 20-30.

[0114] It is understood that the isocyanate curing agent includes but is not limited to at least one of aliphatic isocyanate monomers, aliphatic isocyanate polymers, alicyclic isocyanate monomers, alicyclic isocyanate polymers, aromatic isocyanate monomers, aromatic isocyanate polymers, isocyanate hybrids, and isocyanate hybrid polymers.

[0115] In some of these examples, in acrylic resin coatings, the curing agent includes an alicyclic diisocyanate polymer.

[0116] In some of these examples, in acrylic resin coatings, the curing agent includes HDI trimer (hexamethylene diisocyanate trimer).

[0117] In some of these examples, the viscosity of the curing agent in acrylic resin coatings is 500 mPa·s~4000 mPa·s.

[0118] In some of these examples, in acrylic resin coatings, the weight average molecular weight of the curing agent is 1500~8000.

[0119] In some of these examples, in acrylic resin coatings, the curing agent includes HT-101H (Wanhua Chemical).

[0120] In some of these examples, in the acrylic resin coating, the second solvent includes an ester solvent.

[0121] In some of these examples, acrylic paint consists of component A and component B:

[0122] Component A is composed of the following components by weight: 15-30 parts of thermosetting acrylic resin, 8-24 parts of matte acrylic resin, 1-3 parts of anti-sagging resin, 0.5-4 parts of amino resin, 1-2 parts of silicon dioxide, 0.1-1 parts of catalyst, 0.2-1 parts of leveling agent, 0.5-1.5 parts of ultraviolet absorber, 0.2-1 parts of light stabilizer, 1-3 parts of anti-sagging aid and 29-43 parts of the first solvent; the hydroxyl value of the thermosetting acrylic resin is 140 mgKOH / g ~160 mgKOH / g;

[0123] Component B consists of the following components by weight: 10 to 20 parts of a curing agent and 2 to 5 parts of a second solvent.

[0124] In some of the examples, the mass ratio of component A to component B in acrylic resin coatings is 100:15~22.

[0125] It will be appreciated that the mass ratio of component A to component B includes but is not limited to 100:15, 100:16, 100:17, 100:18, 100:19, 100:20, 100:21, and 100:22.

[0126] It can be understood that component A and component B are stored separately and mixed in the above ratio when used.

[0127] After mixing, the viscosity is 20±5S, Ford-4 cup (FC-4) / 25℃, the construction solid content is ≥42%, and the proportion of components can be adjusted according to needs to achieve a gloss range of G60=15-45°.

[0128] In some of these examples, the acrylic resin coating is a varnish coating.

[0129] An embodiment of the present application provides a method for preparing an acrylic resin coating, comprising the following steps:

[0130] Step S10: providing raw materials according to the above acrylic resin coating.

[0131] In some of the examples, in step S10, the matte type acrylic resin is stirred and dispersed by a disperser.

[0132] Step S20: Mix the raw materials corresponding to component A to obtain component A.

[0133] In some of the examples, in step S20, the thermosetting acrylic resin and a portion of the ester solvent in the first solvent are mixed, and then the dispersed matte acrylic resin, amino resin, anti-sagging resin, catalyst and remaining solvent are added in sequence.

[0134] Furthermore, in step S20, after the thermosetting acrylic resin and part of the ester solvent in the first solvent are mixed, the dispersed matte acrylic resin, amino resin, anti-sagging resin, anti-sagging aid, catalyst, leveling agent, ultraviolet absorber, light stabilizer and remaining solvent are added in sequence.

[0135] Step S30: Mix the raw materials corresponding to component B to obtain component B.

[0136] The preparation method of the acrylic resin coating provided in the present application can produce the above-mentioned acrylic resin coating, which has good storage stability and gloss stability, as well as good mechanical properties, impact resistance, aging resistance and chemical resistance.

[0137] An embodiment of the present application provides a resin coating, the raw material of the resin coating includes the above-mentioned acrylic resin coating.

[0138] It can be understood that the present application does not limit the thickness of the resin coating, which can be set according to demand.

[0139] In some examples, the thickness of the resin coating is 30 μm to 60 μm. Optionally, the thickness of the resin coating is 40 μm to 50 μm.

[0140] An embodiment of the present application provides a method for preparing a resin coating, comprising the following steps:

[0141] The acrylic resin coating is formed into a film and then cured to obtain a resin coating.

[0142] In some of the examples, in the method for preparing the resin coating, the curing temperature is 130° C. to 160° C.; further, the curing time is 15 min to 30 min.

[0143] In some of the examples, in the method for preparing the resin coating, the film-forming method includes but is not limited to spraying, rotary atomization coating, etc.

[0144] One embodiment of the present application provides the use of the acrylic resin coating or the resin coating in preparing a coated product. Another embodiment of the present application provides a coated product, comprising the resin coating.

[0145] In some examples, the coated articles include, but are not limited to, automobiles, ships, machinery, and other fields.

[0146] The present application is further described in detail below in conjunction with specific implementation methods, but the implementation methods of the present application are not limited thereto.

[0147] Example 1

[0148] As shown in Table 1, acrylic resin coating:

[0149] Calculated by mass, component A: 26.3 parts of thermosetting acrylic resin a (SA-7000, hydroxyl value 160 mgKOH / g), 8 parts of matte acrylic resin (Hypomer MT-2550K), 1.9 parts of anti-sagging resin (50% BTZ10-KH393), 0.8 parts of amino resin (CY 238), 2 parts of silica (Acematt 3400), 0.2 parts of catalyst (Nacure-4167), 0.5 parts of leveling agent (NSU-8853), 1.4 parts of ultraviolet absorber (Tinuvin 400), 0.8 parts of light stabilizer (SANDUVOR 3058) and anti-sagging additive (40% NT-200) 1.9 parts and a first solvent, wherein the first solvent includes 1.9 parts of an alcohol solvent (n-butanol) and 36.3 parts of an ester mixed solvent, the ester mixed solvent includes butyl acetate, ethyl 3-ethoxypropionate and a mixed high-valent acid ester DBE, the mass ratio of silica to thermosetting acrylic resin is 0.076:1, and the mass ratio of matte acrylic resin to thermosetting acrylic resin is 0.3:1;

[0150] Calculated by mass, component B: 13.5 parts of curing agent HDI trimer (HT-101H) and 4.5 parts of the second solvent (butyl acetate).

[0151] Prepare acrylic paint:

[0152] (1) Weigh the raw materials of each component in proportion, put the thermosetting acrylic resin and 4 parts of ester mixed solvent into container A, and then stir with a disperser;

[0153] (2) Put the matte acrylic resin into container B and stir it with a disperser for 10 min to 15 min to obtain a dispersed matte acrylic resin;

[0154] (3) Add the matte acrylic resin, amino resin, anti-sagging resin, anti-sagging aid, phosphoric acid catalyst, leveling agent, ultraviolet absorber, light stabilizer, alcohol solvent, 32.3 parts by weight of ester mixed solvent and silicon dioxide dispersed in step (2) into container A in sequence under stirring, and stir in a disperser for 20 min to 30 min to obtain component A;

[0155] (4) Place HDI trimer and the second solvent in container C, and then stir with a disperser for 20 min to 30 min to obtain component B.

[0156] The difference between Examples 2 to 5 and Comparative Examples 1 to 2 and Example 1 is that the composition or mass fraction of some components is different, as shown in Table 1-1.

[0157] Table 1-1

[0158]

[0159] Example 6

[0160] It is basically the same as Example 3, with the main difference being that, in Example 6, the thermosetting acrylic resin a in component A of Example 3 is replaced with thermosetting acrylic resin b (65% KH-550, with a hydroxyl value of 140 mgKOH / g), as shown in Table 1-2.

[0161] Example 7

[0162] It is basically the same as Example 3, with the main difference being that the mass fraction of silica is 1.1 parts, the mass fraction of matte acrylic resin is 17.0 parts, and the mass ratio of silica to thermosetting acrylic resin is about 0.05:1, as shown in Table 1-2.

[0163] Example 8

[0164] It is basically the same as Example 3, with the main difference that the mass fraction of the thermosetting acrylic resin is 19.6 parts, the mass fraction of the matte acrylic resin is 19.6 parts, and the mass ratio of the matte acrylic resin to the thermosetting acrylic resin is 1:1, as shown in Table 1-2.

[0165] Comparative Example 3

[0166] It is basically the same as Example 1, with the main difference being that, in Comparative Example 3, the thermosetting acrylic resin a in component A of Example 3 is replaced with a thermosetting acrylic resin c (65% HSA-4821, with a hydroxyl value of 120 mgKOH / g, from Hunan Xiangjiang Kansai Paint Co., Ltd.), as shown in Table 1-2.

[0167] Comparative Example 4

[0168] It is basically the same as Example 3, with the main difference being that, in Comparative Example 4, the thermosetting acrylic resin a in component A of Example 3 is replaced with a thermosetting polyester resin d (HSE-4202, with a hydroxyl value of 160 mgKOH / g), as shown in Table 1-2.

[0169] Table 1-2

[0170]

[0171] Preparation of coating film

[0172] (5) The components A and B obtained in each embodiment and comparative example were mixed evenly (the mixing ratio is shown in Table 1) to prepare a matte varnish; and a conventional matte varnish (KINO 6120H); a phosphating plate (PB-L3020 manufactured by Parkersei Co., Ltd. of Japan) was taken, and an electrophoretic cathode electrophoretic primer (film thickness 20-25 μm, HT8000 electrophoretic primer manufactured by Hunan Xiangjiang Kansai Paint Co., Ltd.) was applied, baked at 175°C for 20 min, and allowed to stand at room temperature for more than 24 hours; the midcoat was the WP-595N N-8.5 water-based midcoat commercially available from Hunan Xiangjiang Kansai Paint Co., Ltd., and the topcoat was the WBC-795N matte dark gray water-based topcoat commercially available from Hunan Xiangjiang Kansai Paint Co., Ltd.;

[0173] (6) The spraying process includes: spraying WP-595N N-8.5 water-based midcoat to control the dry film thickness to 15 μm~20 μm, leveling for 5 minutes, spraying WBC-795N matte dark gray water-based topcoat to control the dry film thickness to 10 μm~15 μm, leveling for 5 minutes, pre-baking in an oven at 80°C for 5 minutes, spraying the matte varnish prepared in each embodiment and comparative example after cooling, controlling the dry film thickness to 35 μm~45 μm, leveling for 7 minutes, and then baking in an oven at 140°C for 30 minutes (make sure the test plate temperature reaches 140°C before timing) to form an overall film.

[0174] The test method for the film thickness of each coating is as follows: spray any coating with a blank tinplate together, level it for 10 minutes, bake it at 140℃ for 30 minutes to ensure drying, and then test it with a film thickness meter.

[0175] Performance test standards and methods are shown in Table 2-1 and Table 2-2.

[0176] Table 2-1

[0177]

[0178] Table 2-2

[0179]

[0180] The test results are shown in Table 3-1 and Table 3-4.

[0181] Table 3-1

[0182]

[0183] Table 3-2

[0184]

[0185] Table 3-3

[0186]

[0187] Table 3-4

[0188]

[0189] It can be seen from the above that the acrylic resin coating prepared in the embodiment has good storage stability, long service life, good gloss stability, high physical properties, good wear resistance and chemical corrosion resistance; good construction stability and good coating quality; while the addition ratio of the matte acrylic resin in comparative example 1 is inappropriate, the flatness of the coating is not good, and the physical properties are also reduced; the traditional matte varnish and comparative example 2 introduce a large amount of matting powder, resulting in poor cycle stability and short service life, while the construction workability is poor, the film thickness and temperature and humidity sensitivity are unqualified, and the coating performance also has the disadvantages of poor physical properties and poor chemical resistance; the thermosetting acrylic resin c used in comparative example 3 has a low hydroxyl value, poor cycle stability, short service life, poor flatness of the coating, and poor chemical resistance; comparative example 4 uses a thermosetting polyester resin, the hardness of which does not meet the requirements, and the chemical resistance and aging resistance are poor.

[0190] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0191] The above-described embodiments only express several implementation methods of the present application, which is convenient for understanding the technical solution of the present application in detail, but it cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the scope of protection of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the scope of protection of the claims attached to the present application. Therefore, the scope of protection of the patent of this application shall be based on the content of the attached claims, and the description can be used to interpret the content of the claims.

Claims

1. An acrylic resin coating, characterized in that: It includes component A and component B; The component A comprises the following components by weight: 15 to 30 parts of a thermosetting acrylic resin, 8 to 24 parts of a matte acrylic resin, 1 to 3 parts of an anti-sagging resin, 0.5 to 4 parts of an amino resin, 1 to 2 parts of silicon dioxide, 0.1 to 1 parts of a catalyst, and 29 to 43 parts of a first solvent; the hydroxyl value of the thermosetting acrylic resin is 140 mgKOH / g to 160 mgKOH / g; In parts by mass, the B component includes 10 to 20 parts of a curing agent and 2 to 5 parts of a second solvent.

2. The acrylic resin coating according to claim 1, characterized in that The mass ratio of the matte acrylic resin to the thermosetting acrylic resin is 0.3-1.4:1; and / or, The mass ratio of the silicon dioxide to the thermosetting acrylic resin is 0.05-0.1:

1.

3. The acrylic resin coating according to claim 1, characterized in that: The thermosetting acrylic resin satisfies at least one of the following characteristics: (1) The viscosity of the thermosetting acrylic resin is 1000 mpa·s to 4000 mpa·s; (2) The weight average molecular weight of the thermosetting acrylic resin is 4000-8000; (3) The solid content of the thermosetting acrylic resin is 65 wt% to 75 wt%; (4) The thermosetting acrylic resin includes at least one of SA-7000, KH-550 and ACR6750A.

4. The acrylic resin coating according to claim 1, characterized in that The matte acrylic resin includes at least one of Hypomer MT-2550K, Hypomer MT-2350 and Hypomer MT-2550F.

5. The acrylic resin coating according to any one of claims 1 to 4, characterized in that: The A component satisfies at least one of the following characteristics: (1) The amino resin includes methyl and butyl etherified melamine formaldehyde resin; optionally, the amino resin includes CY 238; (2) The anti-sagging resin comprises a thermosetting acrylic resin modified with a polyurea compound; Optionally, the content of the polyurea compound in the polyurea compound-modified thermosetting acrylic resin is 5 wt% to 10 wt%; Optionally, the anti-sagging resin includes BTZ10-KH393; (3) The catalyst includes a phosphoric acid catalyst; optionally, the catalyst includes Nacure-4167; (4) The silicon dioxide comprises fumed silicon dioxide; optionally, the silicon dioxide comprises Acematt 3400; (5) In the component A, the first solvent comprises 1 to 3 parts of an alcohol solvent and 28 to 40 parts of an ester solvent, calculated by weight; optionally, the alcohol solvent comprises at least one of n-butanol, isobutanol and isooctyl alcohol; optionally, the ester solvent comprises at least two of a first ester solvent, a second ester solvent and a third ester solvent, the boiling point of the first ester solvent being lower than that of the second ester solvent, and the boiling point of the second ester solvent being lower than that of the third ester solvent; optionally, the first ester solvent comprises butyl acetate, the second ester solvent comprises ethyl 3-ethoxypropionate, and the third ester solvent comprises at least one of DBE, ethylene glycol butyl acetate and tetramethylbenzene.

6. The acrylic resin coating according to any one of claims 1 to 4, characterized in that: The component A further comprises at least one of a leveling agent, an ultraviolet absorber, a light stabilizer and an anti-sagging aid.

7. The acrylic resin coating according to claim 6, characterized in that: In parts by mass, the component A further comprises 0.2 to 1 part of a leveling agent, 0.5 to 1.5 parts of an ultraviolet absorber, 0.2 to 1 part of a light stabilizer and 1 to 3 parts of an anti-sagging agent.

8. The acrylic resin coating according to claim 7, characterized in that: The A component satisfies at least one of the following characteristics: (1) The leveling agent includes acrylic silicone copolymer; optionally, the leveling agent includes DISPARLON NSU-8853; (2) The ultraviolet absorber includes a triazine ultraviolet absorber; optionally, the ultraviolet absorber includes Tinuvin 400; (3) The light stabilizer includes a hindered amine light stabilizer; optionally, the hindered amine light stabilizer includes N-(1-acetyl-2,2,6,6-tetramethyl-4-piperidinyl)-2-dodecylsuccinimide; (4) The anti-sagging agent includes NT-200.

9. The acrylic resin coating according to any one of claims 1 to 4, 7 to 8, characterized in that: The B component meets at least one of the following characteristics: (1) The curing agent includes an isocyanate curing agent; optionally, the NCO value of the isocyanate curing agent is 20 to 30; (2) The viscosity of the curing agent is 500 mpa·s~4000 mpa·s; (3) The weight average molecular weight of the curing agent is 1500~8000; (4) The second solvent includes an ester solvent.

10. The acrylic resin coating according to any one of claims 1 to 4, 7 to 8, characterized in that: The mass ratio of the component A to the component B is 100:15-22.

11. A method for preparing an acrylic resin coating, characterized in that: The following steps are involved: Providing raw materials according to the acrylic resin coating according to any one of claims 1 to 10; Mixing the raw materials corresponding to the A component to obtain the A component; The raw materials corresponding to the B component are mixed to obtain the B component.

12. A resin coating, characterized in that: The raw material of the resin coating comprises the acrylic resin coating as described in any one of claims 1 to 10.

13. A coated product, characterized in that: Comprising the resin coating as claimed in claim 12.

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