Matt adjustable resin composition and polyurea asparagi matt coating composition

Abstract

The invention provides a matte adjustable resin composition and an asparagus polyurea matte coating composition, and relates to the technical field of coatings. The matte adjustable resin composition comprises the following raw material components: aspartic ester resin and an acrylate polymer, the weight ratio of the acrylate polymer in the matte adjustable resin composition is 5 to 30 percent; and the side chain of the acrylate polymer contains alkyl groups with C4 and longer carbon chains in a molar ratio of not less than 5%. According to the invention, a certain amount of acrylate resin with a specific structure is added into the aspartic polyurea coating and has certain incompatibility with aspartic ester resin, so that the matte performance of the aspartic polyurea coating can be obviously improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings and relates to a matte adjustable resin composition and an aspartame polyurea matte coating composition. Background Art

[0002] Too much glossiness in paint may cause light pollution. Matte paint can solve the light pollution problem caused by glossy paint and is especially suitable for indoor environments or occasions related to living environments. In order to give the paint a matte effect, there are generally two ways to achieve it: (1) Add fillers with high oil absorption to the paint, such as talcum powder, heavy calcium, kaolin, etc.; (2) Add a matting agent to the paint, and use the organic solvent to evaporate and shrink the paint film to obtain an uneven surface and reduce reflection. Aspartic acid resin has the characteristics of high solid and low viscosity. The above two matte methods are not very suitable for aspartic acid resin. The use of the above method (1) will significantly increase the viscosity of the aspartic acid resin and reduce the workability and / or adhesion; the use of the above method (2) is not easy to form an uneven surface because aspartic acid resin generally does not contain or adds a small amount of organic solvent.

[0003] Therefore, for aspartic acid ester resins, in order to achieve a matte effect, a more effective matting agent needs to be developed. Summary of the invention

[0004] In order to improve the matte property and matte adjustability of aspartic acid polyurea coating, the present invention has done a lot of analysis, research and testing, and found that adding a certain amount of acrylic acid ester polymer with a specific structure to aspartic acid ester resin can solve the above technical problems. Based on this, the present invention provides a matte adjustable resin composition and an aspartic acid polyurea matte coating composition.

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

[0006] A matte adjustable resin composition, the raw material components of which include aspartic acid ester resin and acrylate polymer;

[0007] The weight percentage of the acrylic ester polymer in the matte adjustable resin composition is 5-30%;

[0008] The acrylic ester polymer side chain contains no less than 5% by mole of C4 and longer carbon chain alkyl groups.

[0009] Preferably, the aspartic acid ester resin has a structure as shown in the following formula (1):

[0010]

[0011] Wherein, X is selected from a polyvalent organic structure having a number average molecular weight of 50-5000 which is inert to isocyanate groups at 100° C. after the amino group of the polyvalent primary amine compound is removed, and R1 and R 2 Independently selected from C1-C4 alkyl, n=2-3.

[0012] Preferably, the molar proportion of C4 and longer carbon chain alkyl groups in the side chains of the acrylic ester polymer is not higher than 70%.

[0013] Preferably, the raw material of the C4 and longer carbon chain alkyl group is at least one of an acrylate monomer and a substituted styrene monomer.

[0014] More preferably, the structure of the acrylic acid ester monomer is as shown in the following formula (2):

[0015] CH 2 =C(R 3 )COOR 4 (2)

[0016] Among them, R 3 is selected from H or C1-C4 alkyl, R 4 Selected from C4 and longer carbon chain alkyl groups.

[0017] More preferably, the structure of the substituted styrene monomer is as shown in the following formula (3):

[0018] R 5 PhCH=CH 2 (3)

[0019] Among them, R 5 The alkyl group is selected from C4 and longer carbon chain alkyl groups, and Ph represents phenyl.

[0020] Preferably, the longer carbon chain alkyl group has no more than 24 carbon atoms.

[0021] Preferably, the raw material of the acrylic ester polymer contains methyl (meth)acrylate, and the molar proportion of the methyl (meth)acrylate in the raw material of the acrylic ester polymer is not less than 30%.

[0022] Preferably, the viscosity of butyl acetate of the acrylic ester polymer at a concentration of 50 wt% at 25° C. is not less than 40 s, and the viscosity is measured by the coating-4 cup method.

[0023] An aspartame polyurea matte coating composition, consisting of a component A and a component B;

[0024] The component A comprises the matte adjustable resin composition described in any one of the above technical solutions;

[0025] The B component is a curing agent.

[0026] The beneficial effects of the present invention are:

[0027] (1) The side chain of the acrylic resin of the present invention contains a certain amount of long carbon chain, which has low polarity and poor compatibility with the aspartic acid resin. Therefore, the acrylic resin and the aspartic acid resin have a certain incompatibility. The acrylic resin and the aspartic acid resin form a certain microphase separation, and the acrylic resin becomes a better matting agent for the aspartic acid resin.

[0028] (2) The present invention can adjust the glossiness of the asparagine polyurea coating according to the structure and addition amount of the acrylate resin, thereby achieving adjustable matte of the asparagine polyurea coating.

[0029] (3) The acrylic resin of the present invention not only imparts matte properties to the aspartame polyurea coating, but also improves the application period of the aspartame polyurea coating and its adhesion to the substrate. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further illustrated and described below through specific implementation methods.

[0031] In order to solve the problem of poor matte property of aspartic polyurea coating, on the one hand, the present invention provides a matte adjustable resin composition, the raw material components of which include aspartic acid ester resin and acrylate polymer;

[0032] The weight proportion of the acrylic ester polymer in the matte adjustable resin composition is 5-50%;

[0033] The side chain of the acrylic ester polymer contains no less than 5% by mole of C4 and longer carbon chain alkyl groups.

[0034] The present invention adds a certain amount of acrylate polymer to aspartic acid ester resin (for example, the weight proportion is any value among 5%, 7%, 10%, 12%, 15%, 18%, 20%, 22%, 25%, 27%, 30%, etc. or any value in between, without special restrictions), and the side chain of the acrylate polymer contains a certain molar ratio of 4 carbon atoms or longer carbon chain alkyl, and the 4 carbon atoms or longer carbon chain alkyl has a low polarity, so that there is a certain incompatibility between the acrylate polymer and the aspartic acid ester resin, so the acrylate polymer can produce a certain microphase separation with the aspartic acid ester resin, and form a matte effect in the aspartic acid polyurea coating. By adjusting the structure and addition amount of the acrylate polymer, the degree of microphase separation and the matte effect can be adjusted. Generally, within a certain range, the higher the addition amount of the acrylate polymer, the worse the compatibility of the acrylate polymer and the aspartic acid ester resin, and the more obvious the matte effect of the aspartic acid polyurea coating.

[0035] The acrylate polymer side chain contains C4 and longer carbon chain alkyl groups with a molar proportion of not less than 5% means that the average polymerization degree of the polymerization unit corresponding to the C4 and longer carbon chain alkyl group (such as the polymerization unit formed by butyl acrylate monomer) accounts for not less than 5% of the average polymerization degree of the acrylate polymer. From the actual polymerization reaction operation, it can be calculated according to the molar proportion of the polymerizable monomer containing C4 and longer carbon chain alkyl groups (such as butyl acrylate, isooctyl acrylate, etc.) in all polymerizable monomers.

[0036] In the present invention, there is no particular limitation on the preparation method of the acrylate polymer, and the conventional free radical polymerization method can be used, such as: adding each polymerizable monomer and a solvent to a reaction vessel, and under the action of a free radical initiator (such as a peroxide initiator, an azo compound initiator, etc.) and a certain temperature, each polymerizable monomer undergoes a polymerization reaction to form an acrylate polymer, and the acrylate polymer can be in the form of a solution or a pure polymer. This is well known to those skilled in the art. From the perspective of operational convenience, the acrylate polymer can exist in the form of a solution, such as a solution with a concentration of 50wt% or 60wt%, which is easier to mix with an aspartic acid ester resin to obtain a uniformly mixed matte adjustable resin composition.

[0037] In the present invention, the weight proportion of the acrylate polymer in the matte adjustable resin composition can further be 20-50%. For example, it can be any value among 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc. or any value in between, without special limitation.

[0038] In the present invention, the aspartic acid ester resin has a structure as shown in the following formula (1):

[0039]

[0040] Wherein, X is selected from a polyvalent organic structure having a number average molecular weight of 50-5000 which is inert to isocyanate groups at 100° C. after the amino group of the polyvalent primary amine compound is removed, and R 1 and R 2 The aspartic acid ester resin can be directly purchased from the market, such as F420, F520, F220, F421, F2850, F330, F221 and the like of Shenzhen Feiyang Junyan New Materials Co., Ltd.

[0041] In the present invention, the molar proportion of C4 and longer carbon chain alkyl groups in the side chain of the acrylate polymer is not higher than 70%. If the molar proportion of C4 and longer carbon chain alkyl groups in the side chain of the acrylate polymer is too high, the compatibility of the acrylate polymer with the aspartic acid ester resin will be too poor, which is not conducive to the formation of a matte effect. For example, the molar proportion of C4 and longer carbon chain alkyl groups in the side chain of the acrylate polymer can be any value or any value in between 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, etc., without special restrictions. Alternatively, further, the molar proportion of C4 and longer carbon chain alkyl groups in the side chain of the acrylate polymer is not higher than 60% and not lower than 20%.

[0042] In the present invention, the raw material of the C4 and longer carbon chain alkyl is at least one of an acrylate monomer and a substituted styrene monomer. The free radical polymerization activity of the acrylate monomer and the substituted styrene monomer is very high, and the C4 and longer carbon chain alkyl can be efficiently introduced into the side chain of the acrylate polymer, and play a role in improving the matte of the aspartic acid ester resin.

[0043] In the present invention, the structure of the acrylate monomer is shown in the following formula (2):

[0044] CH 2 =C(R 3 )COOR 4 (2)

[0045] Among them, R 3 is selected from H or C1-C4 alkyl, R 4 The alkyl group is selected from C4 and longer carbon chains. For example, the acrylate monomer can be butyl acrylate, butyl methacrylate, isobutyl acrylate, octyl acrylate, isooctyl acrylate, isooctyl methacrylate, lauryl acrylate, lauryl methacrylate, stearic acrylate, etc., which can be directly purchased from the market. It is generally believed that the above-mentioned acrylate monomers are soft monomers, and the glass transition temperature Tg of the formed homopolymer is relatively low.

[0046] In the present invention, the structure of the substituted styrene monomer is shown in the following formula (3):

[0047] R 5 PhCH=CH 2 (3)

[0048] Among them, R 5The alkyl group is selected from C4 and longer carbon chain, and Ph represents phenyl. In the present invention, the substituent of the substituted styrene monomer can be ortho, para or meta, for example, 4-tert-butylstyrene, 4-butylstyrene, 4-octylstyrene, etc., which can be directly purchased from the market.

[0049] In the present invention, the number of carbon atoms of the longer carbon chain alkyl group does not exceed 24. For example, the longer carbon chain alkyl group may be hexyl, octyl, isooctyl, lauryl, stearyl, tetradecyl, hexadecyl, and the like.

[0050] In the present invention, the raw material of the acrylate polymer contains methyl (meth)acrylate, and the molar proportion of methyl (meth)acrylate in the raw material of the acrylate polymer is not less than 30%. The polymer of methyl (meth)acrylate has a higher polarity, which can improve the compatibility of the acrylate polymer with the aspartic acid resin, so that the incompatibility of the acrylate polymer with the aspartic acid resin is within a certain range, and the compatibility is neither too good nor too poor. For example, the molar proportion of methyl (meth)acrylate in the raw material of the acrylate polymer can be 30%, 32%, 35%, 37%, 38%, 40%, 42%, 44%, 45%, 47%, 48%, 50%, 52%, 54%, 55%, 57%, 58%, 60%, etc., or any value between them, without special restrictions. Further, the molar proportion of methyl (meth)acrylate in the raw material of the acrylate polymer is not higher than 60%, or further, the molar proportion is not higher than 50%.

[0051] In the present invention, the viscosity of the butyl acetate of the acrylate polymer at a concentration of 50wt% at 25°C is not less than 40s, and the viscosity is measured by the coating-4 cup method. By adopting the above technical scheme, the acrylate polymer has a sufficient molecular weight to achieve interaction with the aspartic acid ester resin and improve the matte effect of the aspartic acid polyurea coating.

[0052] On the other hand, the present invention also provides an aspartame polyurea matte coating composition, which consists of a component A and a component B;

[0053] Component A comprises the matte adjustable resin composition described in any one of the above technical solutions; the weight proportion of the matte adjustable resin composition in component A can be 50-90%. In addition to the matte adjustable resin composition, component A can also include fillers (such as inorganic fillers, organic fillers, etc.), pigments, additives (such as leveling agents, wetting agents, dispersants, thixotropic agents, thickeners, etc.), etc.

[0054] Component B is a curing agent, which is generally an isocyanate curing agent. Isocyanate curing agents can be purchased directly from the market, such as GB5240B, GB5245B, HDI trimer, adducts of HDI trimer and polyether polyol, adducts of HDI trimer and polyester polyol, etc. from Feiyang Junyan Company.

[0055] In order to achieve a better curing effect, the molar ratio of -NH- groups in component A to -NCO groups in component B can be 1:1-1.1, such as 1:1.02, 1:1.05, 1:1.07, etc.

[0056] The technical solution of the present invention is further described and illustrated according to various embodiments below. Unless otherwise specified, the parts described in the following embodiments are parts by weight.

[0057] Preparation Example 1

[0058] 500 g of polymerizable monomer (composed of methyl methacrylate, ethyl acrylate, butyl acrylate and isooctyl acrylate in a molar ratio of 4:2:1:1) and 500 g of butyl acetate were added to a reaction container, nitrogen was passed through to deoxygenate, 4 g of AIBN was added, the temperature was raised to 70° C., the reaction was continued for 6 hours, 1 g of AIBN was added and the reaction was continued for 2 hours, the temperature was lowered, and butyl acetate was added to adjust the solution concentration to 50 wt % to obtain an acrylate polymer solution.

[0059] Preparation Example 2

[0060] 500 g of polymerizable monomer (composed of methyl methacrylate, isobutyl acrylate, isooctyl acrylate and lauryl methacrylate in a molar ratio of 5:2:2:1) and 500 g of butyl acetate were added to a reaction container, nitrogen was passed through to deoxygenate, 4 g of AIBN was added, the temperature was raised to 70° C. and the reaction was carried out for 6 hours, 1 g of AIBN was added and the reaction was continued for 2 hours, the temperature was lowered, and butyl acetate was added to adjust the solution concentration to 50 wt % to obtain an acrylate polymer solution.

[0061] Preparation Example 3

[0062] 500 g of polymerizable monomer (composed of methyl methacrylate, styrene, 4-butylstyrene and octyl methacrylate in a molar ratio of 3:1:3:3) and 500 g of butyl acetate were added to a reaction container, nitrogen was passed through to deoxygenate, 4 g of AIBN was added, the temperature was raised to 70° C. and the reaction was carried out for 6 hours, 2 g of AIBN was added and the reaction was continued for 2 hours, the temperature was lowered, and butyl acetate was added to adjust the solution concentration to 50 wt % to obtain an acrylate polymer solution.

[0063] Comparative Preparation Example 1

[0064] The difference between this comparative preparation example and preparation example 1 is that the polymerizable monomer is adjusted to consist of methyl methacrylate and ethyl acrylate in a molar ratio of 1:1. The other steps remain unchanged.

[0065] Comparative Preparation Example 2

[0066] The difference between this comparative preparation example and preparation example 1 is that the polymerizable monomer is adjusted to consist of methyl methacrylate, butyl acrylate and lauryl methacrylate in a molar ratio of 1:2:2. The other steps remain unchanged.

[0067] Example 1-6 Preparation of Matte Adjustable Resin Composition

[0068] Example 1

[0069] The matte adjustable resin composition is obtained by mixing the F420 resin of Feiyang Junyan Company and the acrylic ester polymer solution of Preparation Example 1 at a weight ratio of 2:1 and stirring evenly. In this embodiment, the weight ratio of the F420 resin to the acrylic ester polymer is 4:1.

[0070] Example 2

[0071] The difference between this embodiment and embodiment 1 is that the weight ratio of F420 resin to acrylate polymer solution in embodiment 1 is adjusted from 2:1 to 3:4. The other steps remain unchanged. In this embodiment, the weight ratio of F420 resin to acrylate polymer is 3:2.

[0072] Example 3

[0073] The difference between this embodiment and embodiment 1 is that the weight ratio of F420 resin to acrylate polymer solution in embodiment 1 is adjusted from 2:1 to 1:2. The other steps remain unchanged. In this embodiment, the weight ratio of F420 resin to acrylate polymer is 1:1.

[0074] Example 4

[0075] The difference between this example and Example 2 is that in Example 2, the acrylate polymer solution of Preparation Example 1 is replaced by an equal weight of the acrylate polymer solution of Preparation Example 2. The remaining steps remain unchanged.

[0076] Example 5

[0077] The difference between this example and Example 2 is that in Example 2, the acrylate polymer solution of Preparation Example 1 is replaced by an equal weight of the acrylate polymer solution of Preparation Example 3. The remaining steps remain unchanged.

[0078] Comparative Example 1

[0079] The difference between this comparative example and Example 2 is that in Example 2, the acrylate polymer solution of Preparation Example 1 is replaced by an equal weight of the acrylate polymer solution of Comparative Preparation Example 1. The remaining steps remain unchanged.

[0080] Comparative Example 2

[0081] The difference between this comparative example and Example 2 is that in Example 2, the acrylate polymer solution of Preparation Example 1 is replaced by an equal weight of the acrylate polymer solution of Comparative Preparation Example 2. The remaining steps remain unchanged.

[0082] Example 6

[0083] The matte adjustable resin composition is obtained by mixing F520 resin, F420 resin and the acrylic polymer solution of Preparation Example 2 in a weight ratio of 3:3:8 and stirring evenly. In this embodiment, the weight ratio of F520 resin, F420 resin and acrylic polymer is 3:3:4.

[0084] Example 7-13 Preparation of Asparagus polyurea matte coating composition

[0085] Example 7

[0086] The aspartame polyurea matte coating composition consists of an A component and a B component.

[0087] Component A is the matte adjustable resin composition in Example 1.

[0088] Component B is a curing agent, which is a combination of HDI trimer and an adduct of HDI trimer and polyether diol (number average molecular weight 600) (NCO content is 11wt%), and the NCO content in component B is 17.5wt%.

[0089] The molar ratio of -NH- groups in component A to -NCO groups in component B was 1:1.02.

[0090] Mix component A and component B and stir evenly to obtain the asparagine polyurea matte coating.

[0091] Example 8

[0092] The difference between this embodiment and embodiment 7 is that the component A in embodiment 7, which is the matte adjustable resin composition in embodiment 1, is replaced by the component A which is the matte adjustable resin composition in embodiment 2. The other steps remain unchanged.

[0093] Example 9

[0094] The difference between this embodiment and embodiment 7 is that the component A in embodiment 7, which is the matte adjustable resin composition in embodiment 1, is replaced by the component A which is the matte adjustable resin composition in embodiment 3. The other steps remain unchanged.

[0095] Example 10

[0096] The difference between this embodiment and embodiment 8 is that the component A in embodiment 8, which is the matte adjustable resin composition in embodiment 2, is replaced by the component A which is the matte adjustable resin composition in embodiment 4. The other steps remain unchanged.

[0097] Embodiment 11

[0098] The difference between this embodiment and embodiment 8 is that the component A in embodiment 8, which is the matte adjustable resin composition in embodiment 2, is replaced by the component A which is the matte adjustable resin composition in embodiment 5. The other steps remain unchanged.

[0099] Comparative Example 3

[0100] The difference between this comparative example and Example 8 is that in Example 8, component A is adjusted to be composed entirely of F420 resin.

[0101] Comparative Example 4

[0102] The difference between this comparative example and Example 8 is that the component A in Example 8, which is the matte adjustable resin composition in Example 2, is replaced by the component A which is the matte adjustable resin composition in Comparative Example 1. The remaining steps remain unchanged.

[0103] Comparative Example 5

[0104] The difference between this comparative example and Example 8 is that the component A in Example 8, which is the matte adjustable resin composition in Example 2, is replaced by the component A, which is the matte adjustable resin composition in Comparative Example 2. The remaining steps remain unchanged.

[0105] Performance test comparison

[0106] Appearance: Visually observe the appearance of the matte coating of aspartame polyurea. Level 1: transparent; Level 2: slightly opaque, nearly transparent, stable when standing, no stratification; Level 3: microemulsion, slightly opaque, stable when standing, no stratification; Level 4: microemulsion, translucent, stable when standing, no stratification; Level 5: milky white, opaque, unstable when standing, easy to stratify.

[0107] Applicable period: Tested according to the method of GB / T 31416-2015.

[0108] Surface drying time and actual drying time: tested according to the method of GB / T 1728-2020.

[0109] Gloss: tested according to the method of GB / T 9754-2007, the test angle is 60°, and the coating composition is cured at room temperature for 24 hours.

[0110] The results are shown in Table 1 below.

[0111] Table 1

[0112]

[0113] From the data in Table 1 above, it can be seen that with the increase of the content of acrylate polymer in the asparagine polyurea matte coating, the glossiness of the asparagine polyurea matte coating is significantly reduced, the application period is greatly extended, but the surface drying time and actual drying time do not change much. With the increase of the content of C4 and above alkyl groups in the side chain of the acrylate polymer, the glossiness of the asparagine polyurea matte coating is also significantly reduced. When the content of acrylate polymer is close, the application period, surface drying time and actual drying time of the coating do not change much.

[0114] Example 12

[0115] The aspartame polyurea matte coating composition consists of an A component and a B component.

[0116] Component A is composed of 50% of the matte adjustable resin composition in Example 2, 14.7% of kaolin, 30% of titanium dioxide, 4% of molecular sieve, and 1.3% of additives, with the additives comprising 0.9% BYK-2013, 0.2% BYK-054, and 0.2% BYK-354, according to 100% by weight.

[0117] Component B is a curing agent, which is composed of 90% Wanhua HT-600, 0.3% waterproofing agent TI, 7.5% butyl acetate and 2.2% PMA based on 100% by weight.

[0118] The molar ratio of -NH- groups in component A to -NCO groups in component B was 1:1.05.

[0119] Comparative Example 6

[0120] The difference between this comparative example and Example 12 is that in component A in Example 12, the matte adjustable resin composition is replaced by an equal weight of F420 resin.

[0121] Embodiment 13

[0122] The aspartame polyurea matte coating composition consists of an A component and a B component.

[0123] Component A is composed of 70% of the matte adjustable resin composition in Example 6, 24.7% of titanium dioxide, 4% of molecular sieve, and 1.3% of additives, with the additives comprising 0.9% BYK-2013, 0.2% BYK-054, and 0.2% BYK-354, by weight.

[0124] Component B is a curing agent, which is composed of 90% Wanhua HT-600, 0.3% waterproofing agent TI, 7.5% butyl acetate and 2.2% PMA based on 100% by weight.

[0125] The molar ratio of -NH- groups in component A to -NCO groups in component B was 1:1.05.

[0126] Comparative Example 7

[0127] The difference between this comparative example and Example 13 is that in component A in Example 13, the matte adjustable resin composition is replaced by a combination of equal weights of F420 resin and F520 resin in a weight ratio of 1:1.

[0128] Performance Testing

[0129] Bond strength: Tested according to GB / T 7124-2008, the substrate is a clean 3mm thick cold-rolled sandblasted steel plate, and the curing is placed at room temperature for 24 hours.

[0130] The results are shown in Table 2 below.

[0131] Table 2

[0132]

[0133]

[0134] From the data results in Table 2 above, it can be seen that adding acrylate polymer to the asparagus polyurea coating can significantly reduce the gloss of the coating, and significantly extend the application period while maintaining little change in the surface drying time and the actual drying time, and also improve the bonding strength.

[0135] As described above, the basic principles, main features and advantages of the present invention are shown and described. Those skilled in the art should understand that the present invention is not limited by the above embodiments, which are only preferred embodiments of the present invention and cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the scope of the present invention and the content of the specification should still be within the scope of the present invention. The scope of protection required by the present invention is defined by the attached claims and their equivalents.

Claims

1. A matte adjustable resin composition, characterized in that: The raw material components include aspartic acid ester resin and acrylate polymer; The weight percentage of the acrylic ester polymer in the matte adjustable resin composition is 5-30%; The acrylic ester polymer side chain contains no less than 5% by mole of C4 and longer carbon chain alkyl groups.

2. The matte adjustable resin composition according to claim 1, characterized in that: The aspartic acid ester resin has a structure as shown in the following formula (1): Wherein, X is selected from a polyvalent organic structure with a number average molecular weight of 50-5000 remaining after removing the amino group from the polyvalent primary amine compound and being inert to the isocyanate group at 100°C, R1 and R2 are independently selected from C1-C4 alkyl, and n=2-3.

3. The matte adjustable resin composition according to claim 1, characterized in that: The molar proportion of alkyl groups with carbon chains of C4 or longer in the side chains of the acrylic ester polymer is not higher than 70%.

4. The matte adjustable resin composition according to claim 1, characterized in that: The raw material of the C4 and longer carbon chain alkyl group is at least one of an acrylate monomer and a substituted styrene monomer.

5. The matte adjustable resin composition according to claim 4, characterized in that: The structure of the acrylic acid ester monomer is shown in the following formula (2): CH2=C(R3)COOR4 (2) Wherein, R3 is selected from H or C1-C4 alkyl, and R4 is selected from C4 and longer carbon chain alkyl.

6. The matte adjustable resin composition according to claim 4, characterized in that: The structure of the substituted styrene monomer is shown in the following formula (3): R5PhCH=CH2 (3) Wherein, R5 is selected from C4 and longer carbon chain alkyl groups, and Ph represents phenyl.

7. The matte adjustable resin composition according to any one of claims 1 to 6, characterized in that: The longer carbon chain alkyl group has no more than 24 carbon atoms.

8. The matte adjustable resin composition according to claim 1, characterized in that: The raw material of the acrylic ester polymer contains methyl (meth)acrylate, and the molar proportion of the methyl (meth)acrylate in the raw material of the acrylic ester polymer is not less than 30%.

9. The matte adjustable resin composition according to claim 1, characterized in that: The viscosity of the butyl acetate of the acrylic ester polymer at a concentration of 50 wt% at 25° C. is not less than 40 seconds, and the viscosity is measured by the coating-4 cup method.

10. An aspartame polyurea matte coating composition, characterized in that: It is composed of component A and component B; The component A comprises the matte adjustable resin composition according to any one of claims 1 to 9; The B component is a curing agent.

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