Acrylic resin coating and preparation method thereof

Abstract

The invention discloses an acrylic resin coating which comprises the following raw materials in parts by weight: 30-35 parts of acrylic resin, 8-12 parts of a flake graphene modifier, 4-7 parts of a regulator, 5-8 parts of a dispersant, 3-6 parts of waterborne polyurethane and 25-30 parts of an acetone solvent. According to the acrylic resin coating disclosed by the invention, the acrylic resin is matched with the dispersing agent, the waterborne polyurethane and the acetone solvent, and the flake graphene modifier and the regulator are adopted, and the two components are matched, coordinated and jointly synergized, so that the matrix adhesive force performance and the impact resistance of the product are coordinated and improved, and the scratch-resistant stability effect of the product is remarkable.

Description

Technical Field

[0001] The invention relates to the technical field of resin coatings, and in particular to an acrylic resin coating and a preparation method thereof. Background Art

[0002] Resins that can be used as water-based paint base materials include alkyd, epoxy, acrylic, polyurethane and polyester resins, and additives such as cosolvents, emulsifiers, film-forming aids, thickeners, defoamers, driers, mildew inhibitors, corrosion inhibitors, etc. Existing acrylic resin coatings have poor adhesion to substrates, and the impact resistance and adhesion performance of the products are difficult to coordinate and improve, and the scratch resistance stability of the products is poor, which further limits the use efficiency of the products. Based on this, the present invention provides an acrylic resin coating and a preparation method thereof. Summary of the invention

[0003] In view of the defects of the prior art, the object of the present invention is to provide an acrylic resin coating and a preparation method thereof to solve the problems raised in the above background technology.

[0004] The present invention solves the technical problem by adopting the following technical solution: The present invention provides an acrylic resin coating, comprising the following raw materials in parts by weight: 30-35 parts of acrylic resin, 8-12 parts of flake graphene modifier, 4-7 parts of regulator, 5-8 parts of dispersant, 3-6 parts of waterborne polyurethane, and 25-30 parts of acetone solvent.

[0005] Preferably, the defoaming agent is the following raw materials in parts by weight: 32.5 parts of acrylic resin, 10 parts of flake graphene modifier, 5.5 parts of regulator, 6.5 parts of dispersant, 4.5 parts of waterborne polyurethane, and 27.5 parts of acetone solvent.

[0006] Preferably, the preparation method of the flaky graphene modifier is: S1: firstly heating the graphene flakes to 210-220°C at a rate of 1-3°C / min, keeping the temperature for 5-10min, then cooling the temperature to 55°C at a rate of 2-5°C / min, keeping the temperature, immersing the graphene flakes in a sufficient amount of 5% by mass lanthanum nitrate solution, then filtering and drying to obtain a lanthanum-doped graphene agent; S2: fully mixing 2-5 parts of sodium lignin sulfonate solution, 1-3 parts of chitosan solution, 2-5 parts of hydroxyapatite and 2-5 parts of yttrium oxide to obtain a modified solution; S3: stirring and modifying the lanthanum-doped graphene agent and the modifying liquid in a weight ratio of 2:5, and after the stirring is completed, washing, filtering, and drying to obtain a flaky graphene modifying agent.

[0007] Preferably, the mass fraction of the sodium lignin sulfonate solution is 2-5%; the mass fraction of the chitosan solution is 4-7%.

[0008] Preferably, the immersion power of the immersion treatment is 350-450W, the immersion time is 25-35min, the stirring speed of the stirring modification treatment is 450-550r / min, and the stirring time is 1-2h.

[0009] Preferably, the preparation method of the regulator is: S11: adding 3-5 parts of silicon carbide whiskers, 1-3 parts of nano-silica sol and 2-4 parts of urea to 6-10 parts of sodium citrate solution, stirring and mixing thoroughly to obtain a whisker solution; S12: The bentonite is first heat treated at 350°C for 10 min, then cooled to 55°C at a rate of 2-5°C / min, and kept warm. The kept warm bentonite and whisker solution are mixed in a weight ratio of 5:2 and ball-milled at a ball-milling speed of 750-850r / min for 2h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a regulator.

[0010] Preferably, the mass fraction of the sodium citrate solution is 10-15%.

[0011] Preferably, the dispersant is BYK-110.

[0012] The invention also provides a method for preparing an acrylic resin coating, comprising the following steps: adding raw materials into a stirrer in sequence and stirring them, stirring and mixing them thoroughly to obtain the acrylic resin coating of the invention.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The acrylic resin coating of the present invention adopts acrylic resin in combination with a dispersant, water-based polyurethane, and an acetone solvent, as well as a flaky graphene modifier and a regulator. The two are coordinated and synergistic, and the substrate adhesion performance and impact resistance of the product are coordinated and improved, and the scratch resistance stability of the product is significantly improved. DETAILED DESCRIPTION

[0014] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] An acrylic resin coating of this embodiment includes the following raw materials in parts by weight: 30-35 parts of acrylic resin, 8-12 parts of flake graphene modifier, 4-7 parts of regulator, 5-8 parts of dispersant, 3-6 parts of waterborne polyurethane, and 25-30 parts of acetone solvent.

[0016] The defoamer of this embodiment is the following raw materials in parts by weight: 32.5 parts of acrylic resin, 10 parts of flake graphene modifier, 5.5 parts of regulator, 6.5 parts of dispersant, 4.5 parts of waterborne polyurethane, and 27.5 parts of acetone solvent.

[0017] The preparation method of the flake graphene modifier of this embodiment is: S1: firstly heating the graphene flakes to 210-220°C at a rate of 1-3°C / min, keeping the temperature for 5-10min, then cooling the temperature to 55°C at a rate of 2-5°C / min, keeping the temperature, immersing the graphene flakes in a sufficient amount of 5% by mass lanthanum nitrate solution, then filtering and drying to obtain a lanthanum-doped graphene agent; S2: fully mixing 2-5 parts of sodium lignin sulfonate solution, 1-3 parts of chitosan solution, 2-5 parts of hydroxyapatite and 2-5 parts of yttrium oxide to obtain a modified solution; S3: stirring and modifying the lanthanum-doped graphene agent and the modifying liquid in a weight ratio of 2:5, and after the stirring is completed, washing, filtering, and drying to obtain a flaky graphene modifying agent.

[0018] The mass fraction of the sodium lignin sulfonate solution in this embodiment is 2-5%; the mass fraction of the chitosan solution is 4-7%.

[0019] The immersion power of the immersion treatment in this embodiment is 350-450W, the immersion time is 25-35min, the stirring speed of the stirring modification treatment is 450-550r / min, and the stirring time is 1-2h.

[0020] The preparation method of the regulator of this embodiment is: S11: adding 3-5 parts of silicon carbide whiskers, 1-3 parts of nano-silica sol and 2-4 parts of urea to 6-10 parts of sodium citrate solution, stirring and mixing thoroughly to obtain a whisker solution; S12: The bentonite is first heat treated at 350°C for 10 min, then cooled to 55°C at a rate of 2-5°C / min, and kept warm. The kept warm bentonite and whisker solution are mixed in a weight ratio of 5:2 and ball-milled at a ball-milling speed of 750-850r / min for 2h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a regulator.

[0021] The mass fraction of the sodium citrate solution of the present embodiment is 10-15%.

[0022] The dispersant in this embodiment is BYK-110.

[0023] The method for preparing an acrylic resin coating of the present embodiment comprises the following steps: adding raw materials into a mixer in sequence and stirring them until they are fully mixed to obtain the acrylic resin coating of the present invention.

[0024] Example 1. An acrylic resin coating of this embodiment includes the following raw materials in parts by weight: 30 parts of acrylic resin, 8 parts of flake graphene modifier, 4 parts of regulator, 5 parts of dispersant, 3 parts of waterborne polyurethane, and 25 parts of acetone solvent.

[0025] The preparation method of the flake graphene modifier of this embodiment is: S1: The graphene flakes are first heated to 210°C at a rate of 1°C / min, kept warm for 5 minutes, then cooled to 55°C at a rate of 2°C / min, kept warm, and the kept graphene flakes are immersed in a sufficient amount of 5% by mass lanthanum nitrate solution for immersion treatment, then filtered and dried to obtain a lanthanum-doped graphene agent; S2: 2 parts of sodium lignin sulfonate solution, 1 part of chitosan solution, 2 parts of hydroxyapatite and 2 parts of yttrium oxide are fully mixed to obtain a modified solution; S3: stirring and modifying the lanthanum-doped graphene agent and the modifying liquid in a weight ratio of 2:5, and after the stirring is completed, washing, filtering, and drying to obtain a flaky graphene modifying agent.

[0026] The mass fraction of the sodium lignin sulfonate solution in this embodiment is 2%; the mass fraction of the chitosan solution is 4%.

[0027] The immersion power of the immersion treatment in this embodiment is 350 W, the immersion time is 25 min, the stirring speed of the stirring modification treatment is 450 r / min, and the stirring time is 1 h.

[0028] The preparation method of the regulator of this embodiment is: S11: adding 3 parts of silicon carbide whiskers, 1 part of nano-silica sol and 2 parts of urea to 6 parts of sodium citrate solution, stirring and mixing thoroughly to obtain a whisker solution; S12: The bentonite is first heat treated at 350°C for 10 min, then cooled to 55°C at a rate of 2°C / min, and kept warm. The kept warm bentonite and whisker solution are mixed in a weight ratio of 5:2 and ball-milled at a ball-milling speed of 750 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a regulator.

[0029] The mass fraction of the sodium citrate solution in this embodiment is 10%.

[0030] The dispersant in this embodiment is BYK-110.

[0031] The method for preparing an acrylic resin coating of the present embodiment comprises the following steps: adding raw materials into a mixer in sequence and stirring them until they are fully mixed to obtain the acrylic resin coating of the present invention.

[0032] Example 2. An acrylic resin coating of this embodiment includes the following raw materials in parts by weight: 35 parts of acrylic resin, 12 parts of flake graphene modifier, 7 parts of regulator, 8 parts of dispersant, 6 parts of waterborne polyurethane, and 30 parts of acetone solvent.

[0033] The preparation method of the flake graphene modifier of this embodiment is: S1: The graphene flakes are first heated to 220°C at a rate of 3°C / min, kept warm for 10 minutes, then cooled to 55°C at a rate of 5°C / min, kept warm, and the kept graphene flakes are immersed in a sufficient amount of 5% by mass lanthanum nitrate solution for immersion treatment, and then filtered and dried to obtain a lanthanum-doped graphene agent; S2: 5 parts of sodium lignin sulfonate solution, 3 parts of chitosan solution, 5 parts of hydroxyapatite and 5 parts of yttrium oxide are fully mixed to obtain a modified solution; S3: stirring and modifying the lanthanum-doped graphene agent and the modifying liquid in a weight ratio of 2:5, and after the stirring is completed, washing, filtering, and drying to obtain a flaky graphene modifying agent.

[0034] The mass fraction of the sodium lignin sulfonate solution in this embodiment is 5%; the mass fraction of the chitosan solution is 7%.

[0035] The immersion power of the immersion treatment in this embodiment is 450 W, the immersion time is 35 min, the stirring speed of the stirring modification treatment is 550 r / min, and the stirring time is 2 h.

[0036] The preparation method of the regulator of this embodiment is: S11: adding 5 parts of silicon carbide whiskers, 3 parts of nano-silica sol and 4 parts of urea to 10 parts of sodium citrate solution, stirring and mixing thoroughly to obtain a whisker solution; S12: The bentonite is first heat treated at 350°C for 10 min, then cooled to 55°C at a rate of 5°C / min, and kept warm. The kept warm bentonite and whisker solution are mixed in a weight ratio of 5:2 and ball-milled at a ball-milling speed of 850 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a regulator.

[0037] The mass fraction of the sodium citrate solution in this embodiment is 15%.

[0038] The dispersant in this embodiment is BYK-110.

[0039] The method for preparing an acrylic resin coating of the present embodiment comprises the following steps: adding raw materials into a mixer in sequence and stirring them until they are fully mixed to obtain the acrylic resin coating of the present invention.

[0040] Example 3. An acrylic resin coating of this embodiment includes the following raw materials in parts by weight: 32.5 parts of acrylic resin, 10 parts of flake graphene modifier, 5.5 parts of regulator, 6.5 parts of dispersant, 4.5 parts of waterborne polyurethane, and 27.5 parts of acetone solvent.

[0041] The preparation method of the flake graphene modifier of this embodiment is: S1: The graphene flakes are first heated to 215°C at a rate of 2°C / min, kept warm for 7.5min, then cooled to 55°C at a rate of 3.5°C / min, kept warm, and the kept graphene flakes are immersed in a sufficient amount of 5% by mass lanthanum nitrate solution for immersion treatment, then filtered and dried to obtain a lanthanum-doped graphene agent; S2: 3.5 parts of sodium lignin sulfonate solution, 2 parts of chitosan solution, 3.5 parts of hydroxyapatite and 3.5 parts of yttrium oxide are fully mixed to obtain a modified solution; S3: stirring and modifying the lanthanum-doped graphene agent and the modifying liquid in a weight ratio of 2:5, and after the stirring is completed, washing, filtering, and drying to obtain a flaky graphene modifying agent.

[0042] The mass fraction of the sodium lignin sulfonate solution in this embodiment is 3.5%; the mass fraction of the chitosan solution is 5.5%.

[0043] The immersion power of the immersion treatment in this embodiment is 400 W, the immersion time is 30 min, the stirring speed of the stirring modification treatment is 500 r / min, and the stirring time is 1.5 h.

[0044] The preparation method of the regulator of this embodiment is: S11: adding 4 parts of silicon carbide whiskers, 2 parts of nano-silica sol and 3 parts of urea to 8 parts of sodium citrate solution, stirring and mixing thoroughly to obtain a whisker solution; S12: The bentonite is first heat treated at 350°C for 10 min, then cooled to 55°C at a rate of 3.5°C / min, and kept warm. The kept warm bentonite and whisker solution are mixed in a weight ratio of 5:2 and ball-milled at a ball-milling speed of 800 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a regulator.

[0045] The mass fraction of the sodium citrate solution in this embodiment is 12.5%.

[0046] The dispersant in this embodiment is BYK-110.

[0047] The method for preparing an acrylic resin coating of the present embodiment comprises the following steps: adding raw materials into a mixer in sequence and stirring them until they are fully mixed to obtain the acrylic resin coating of the present invention.

[0048] Comparative Example 1. The difference from Example 3 is that no flake graphene modifier is added.

[0049] Comparative Example 2. The difference from Example 3 is that step S1 is not used in the preparation of the flake graphene modifier.

[0050] Comparative Example 3. The difference from Example 3 is that no modification liquid treatment was used.

[0051] Comparative Example 4. The difference from Example 3 is that hydroxyapatite and yttrium oxide are not added in the modification liquid treatment.

[0052] Comparative Example 5. The difference from Example 3 is that no regulator is added.

[0053] Comparative Example 6. The difference from Example 3 is that no thermal insulation bentonite is added to the regulator.

[0054] Comparative Example 7. The difference from Example 3 is that no whisker liquid is added to the conditioning agent.

[0055] The product performance of Examples 1-3 and Comparative Examples 1-7 was tested. The product was scratched 20 times with a load of 5N to test the scratch resistance stability. The test was as follows:

[0056] It can be seen from Comparative Examples 1-7 and Examples 1-3 that the adhesion and impact resistance of Example 3 of the present invention can be improved in a coordinated manner, and the scratch resistance stability of the product is also significant; Without adding the flaky graphene modifier or one of the regulators, the product performance has a significant tendency to deteriorate. Only when the two are coordinated and work together, the product performance effect is most significant. In the preparation of the flaky graphene modifier, the S1 step is not used for treatment, the modification liquid is not used for treatment, hydroxyapatite and yttrium oxide are not added in the modification liquid treatment, the thermal insulation bentonite is not added to the regulator, and the whisker liquid is not added to the regulator. The product performance has a tendency to deteriorate. Only when the formula raw material process of the present invention is used, the product performance effect is most significant. Using other methods instead is not as obvious as the effect of the present invention.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An acrylic resin coating, characterized in that: It includes the following raw materials in parts by weight: 30-35 parts of acrylic resin, 8-12 parts of flake graphene modifier, 4-7 parts of regulator, 5-8 parts of dispersant, 3-6 parts of waterborne polyurethane, and 25-30 parts of acetone solvent.

2. An acrylic resin coating according to claim 1, characterized in that: The defoamer is the following raw materials in parts by weight: 32.5 parts of acrylic resin, 10 parts of flake graphene modifier, 5.5 parts of regulator, 6.5 parts of dispersant, 4.5 parts of waterborne polyurethane, and 27.5 parts of acetone solvent.

3. An acrylic resin coating according to claim 1, characterized in that: The preparation method of the flaky graphene modifier is: S1: firstly heating the graphene flakes to 210-220°C at a rate of 1-3°C / min, keeping the temperature for 5-10min, then cooling the temperature to 55°C at a rate of 2-5°C / min, keeping the temperature, immersing the graphene flakes in a sufficient amount of 5% by mass lanthanum nitrate solution, then filtering and drying to obtain a lanthanum-doped graphene agent; S2: fully mixing 2-5 parts of sodium lignin sulfonate solution, 1-3 parts of chitosan solution, 2-5 parts of hydroxyapatite and 2-5 parts of yttrium oxide to obtain a modified solution; S3: stirring and modifying the lanthanum-doped graphene agent and the modifying liquid in a weight ratio of 2:5, and after the stirring is completed, washing, filtering, and drying to obtain a flaky graphene modifying agent.

4. An acrylic resin coating according to claim 3, characterized in that: The mass fraction of the sodium lignin sulfonate solution is 2-5%; the mass fraction of the chitosan solution is 4-7%.

5. An acrylic resin coating according to claim 3, characterized in that: The immersion power of the immersion treatment is 350-450W, the immersion time is 25-35min, the stirring speed of the stirring modification treatment is 450-550r / min, and the stirring time is 1-2h.

6. An acrylic resin coating according to claim 1, characterized in that: The preparation method of the regulator is: S11: adding 3-5 parts of silicon carbide whiskers, 1-3 parts of nano-silica sol and 2-4 parts of urea to 6-10 parts of sodium citrate solution, stirring and mixing thoroughly to obtain a whisker solution; S12: The bentonite is first heat treated at 350°C for 10 min, then cooled to 55°C at a rate of 2-5°C / min, and kept warm. The kept warm bentonite and whisker solution are mixed in a weight ratio of 5:2 and ball-milled at a ball-milling speed of 750-850r / min for 2h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a regulator.

7. An acrylic resin coating according to claim 6, characterized in that: The mass fraction of the sodium citrate solution is 10-15%.

8. An acrylic resin coating according to claim 1, characterized in that: The dispersant is BYK-110.

9. A method for preparing an acrylic resin coating according to any one of claims 1 to 8, characterized in that: The following steps are involved: The raw materials are sequentially added into a stirrer for stirring and mixing thoroughly to obtain the acrylic resin coating of the present invention.

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