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CN-121574628-B - Aluminum profile spraying powder coating and preparation method thereof

CN121574628BCN 121574628 BCN121574628 BCN 121574628BCN-121574628-B

Abstract

The invention discloses an aluminum profile spraying powder coating and a preparation method thereof, and belongs to the technical field of coatings. According to the invention, the modified resin is introduced to enable the coating to have excellent weather resistance, protocatechuic acid, 2- (4-thiazolyl) benzimidazole and 8-hydroxyquinoline with specific proportions are added to be compounded as an antibacterial agent, and the antibacterial agent is chemically bonded into a resin base material, so that the high-efficiency, durable and broad-spectrum antibacterial effect is realized, the more remarkable antibacterial purpose is realized, and the problems of easiness in migration and easiness in failure of the surface spraying antibacterial agent are effectively solved. The invention optimizes the whole formula and the interaction among components, so that the coating has excellent surface flatness and apparent quality, avoids the defects of pinholes and orange peel common to the traditional coating, has obvious antibacterial property and lasting antibacterial property on the whole, and is particularly suitable for building, medical treatment and household aluminum profiles with higher sanitary requirements.

Inventors

  • LI XINYI
  • PANG YU
  • CHEN KAIYUAN
  • LIANG BAOYING

Assignees

  • 佛山职业技术学院

Dates

Publication Date
20260512
Application Date
20260129

Claims (6)

  1. 1. The aluminum profile spray powder coating is characterized by comprising, by weight, 80-100 parts of modified resin base materials, 10-20 parts of modified fillers, 0.5-3 parts of antioxidants, 1-2 parts of film forming additives, 3-7 parts of curing agents, 0.1-0.7 part of curing accelerators, 1-3 parts of leveling agents, 0.1-1 part of brightening agents, 0.3-0.5 part of deaerating agents and 0.1 part of pigments; Adding bisphenol A epoxy resin, fluorocarbon resin, glycidyl methacrylate, an antibacterial agent and a catalyst into a reaction kettle, heating to 85-100 ℃ in an inert gas atmosphere, stirring at a rotating speed of 50-100 r/min for 1-3 h, adding sebacic acid, heating to 120-130 ℃, and continuing stirring for 1-3 h to obtain a modified resin base material; The weight ratio of the bisphenol A epoxy resin, the fluorocarbon resin, the glycidyl methacrylate, the antibacterial agent, the catalyst and the sebacic acid is (8-10): (1-3): (1-2): (0.5-5): (0.1-0.5): (1-5); the antibacterial agent is prepared by mixing protocatechuic acid, 2- (4-thiazolyl) benzimidazole and 8-hydroxyquinoline in a mass ratio of (1-5) (1-3) (2-5); The catalyst is at least one of monobutyl tin oxide and p-toluenesulfonic acid; The modified filler is prepared by dispersing silica micropowder in absolute ethyl alcohol, stirring at 55-65 ℃ for 20-30 min, centrifuging, washing, vacuum drying, adding an alcohol solution of a silane coupling agent, performing ultrasonic dispersion, stirring at 60-70 ℃ for 30-60 min, centrifuging, washing, vacuum drying and grinding.
  2. 2. The aluminum profile spray powder coating of claim 1, wherein the antioxidant is at least one of antioxidant 1076, antioxidant 1010, antioxidant 1098, antioxidant 168, antioxidant 626, and antioxidant TP 80.
  3. 3. The aluminum profile spray powder coating as recited in claim 1, wherein the film forming aid is at least one of propylene glycol, propylene glycol butyl ether, alcohol ester dodecanol, and benzyl alcohol.
  4. 4. The aluminum profile spray powder coating according to claim 1, wherein the curing agent is at least one of triglycidyl isocyanurate, β -hydroxyalkylamide, and isophorone diamine.
  5. 5. The aluminum profile spray powder coating according to claim 1, wherein the curing accelerator is at least one of methylimidazole and triethylphenylphosphine bromide.
  6. 6. A method for preparing the aluminum profile spray powder coating, which is used for preparing the aluminum profile spray powder coating according to claim 5, comprising the following steps: S1, adding a modified resin base material, a modified filler, an antioxidant, a film forming additive, a curing agent, a curing accelerator, a leveling agent, a brightening agent, a degassing agent and pigment into a mixing kettle, and uniformly mixing to obtain a mixture; s2, adding the mixture into a double-screw extruder, and fully melting and mixing to form a molten material; s3, cooling the molten material by a cooling tablet press to cool and solidify the material, and then crushing and sieving the material to obtain the aluminum profile spray powder coating.

Description

Aluminum profile spraying powder coating and preparation method thereof Technical Field The invention relates to the technical field of powder coatings, in particular to an aluminum profile spraying powder coating and a preparation method thereof. Background The aluminum profile is widely applied to the fields of building door and window curtain walls, transportation, electronic and electric appliances, home decoration and the like because of light weight, high strength, easy processing and forming and excellent corrosion resistance. In order to improve the decorative, weather-resistant, corrosion-resistant and mechanical properties of aluminum profiles, it is generally necessary to apply a coating treatment to the surface thereof. As an advanced surface treatment technology, powder coating spraying has the remarkable advantages of no solvent volatilization, high utilization rate, excellent coating performance, environmental friendliness and the like, and becomes one of the main processes for aluminum profile surface treatment. At present, the aluminum profile spraying powder coating commonly used in the market mainly comprises epoxy resin type, polyester resin type and epoxy-polyester mixed type. However, the conventional powder coatings still have the problem that the coating on the surface of the aluminum substrate has insufficient adhesive force under the condition of large temperature difference change or wet environment in the application process, so that the long-term service life of the product is influenced. For outdoor aluminum profiles (such as building outer walls), the powder coating is required to have excellent weather resistance, and the conventional polyester powder coating can have phenomena of light loss, yellowing, color fading and the like after long-term exposure, so that the requirement of high-end buildings on lasting attractiveness is difficult to completely meet. With the diversification of market demands, more additional functional requirements are put on the powder coating, and the whole antibacterial property and lasting antibacterial property of the traditional powder coating are poorer, so that the improvement is still needed. Disclosure of Invention Based on the above, in order to solve one of the above technical problems, the invention provides an aluminum profile spraying powder coating and a preparation method thereof, and the specific technical scheme is as follows: The aluminum profile spray powder coating comprises, by weight, 80-100 parts of modified resin base materials, 10-20 parts of modified fillers, 0.5-3 parts of antioxidants, 1-2 parts of film forming aids, 3-7 parts of curing agents, 0.1-0.7 part of curing accelerators, 1-3 parts of leveling agents, 0.1-1 part of brightening agents, 0.3-0.5 part of degasifying agents and 0.1-1 part of pigments; The preparation method of the modified resin base material comprises the steps of adding bisphenol A type epoxy resin, fluorocarbon resin, glycidyl methacrylate, an antibacterial agent and a catalyst into a reaction kettle, heating to 85-100 ℃ in an inert gas atmosphere, stirring at a rotating speed of 50-100 r/min for 1-3 h, adding sebacic acid, heating to 120-130 ℃, and continuing stirring for 1-3 h to obtain the modified resin base material. Further, the antibacterial agent is obtained by mixing protocatechuic acid, 2- (4-thiazolyl) benzimidazole and 8-hydroxyquinoline in a mass ratio of (1-5) (1-3) (2-5). Further, the proportion of the bisphenol A type epoxy resin, the fluorocarbon resin, the glycidyl methacrylate, the antibacterial agent, the catalyst and the sebacic acid is (8-10), 1-3, 1-2, 0.5-5, 0.1-0.5 and 1-5 according to the weight parts. Further, the catalyst is at least one of monobutyl tin oxide and p-toluenesulfonic acid. Further, the modified filler is obtained by dispersing silica micropowder in absolute ethyl alcohol, stirring at 55-65 ℃ for 20-30 min, centrifuging, washing, vacuum drying, adding into an alcohol solution of a silane coupling agent, performing ultrasonic dispersion, stirring at 60-70 ℃ for 30-60 min, centrifuging, washing, vacuum drying and grinding. Further, the antioxidant is at least one of antioxidant 1076, antioxidant 1010, antioxidant 1098, antioxidant 168, antioxidant 626, and antioxidant TP 80. Further, the film forming auxiliary agent is at least one of propylene glycol, propylene glycol butyl ether, alcohol ester twelve and benzyl alcohol. Further, the curing agent is at least one of triglycidyl isocyanurate, beta-hydroxyalkylamide and isophorone diamine. Further, the curing accelerator is at least one of methylimidazole and triethylphenyl phosphine bromide. In addition, the invention also provides a preparation method of the aluminum profile spray powder coating, which comprises the following steps: S1, adding a modified resin base material, a modified filler, an antioxidant, a film forming additive, a curing agent, a curing accelerator, a leveling agent, a brightening agent,