High-weather-resistance water-based special-effect colorful coating applied to large vehicles such as rail transit and preparation method of high-weather-resistance water-based special-effect colorful coating

Abstract

The invention discloses a high-weather-resistance water-based special-effect colorful coating applied to large vehicles in rail transit and the like. Comprising the following components: a high-transparency hydroxy acrylic emulsion, a self-crosslinking acrylic hybrid aqueous aliphatic polyurethane dispersion, an acrylic dispersion, dimethylethanolamine, a polysiloxane emulsion, a surfactant based on an alkynediol chemical structure, a polyether siloxane copolymer wetting agent and modified polyamide wax. The water-based paint is prepared from a non-ionic modified ethylene-vinyl acetate copolymer wax emulsion, a triazine ultraviolet light absorber, a sebacate light stabilizer, ethylene glycol monobutyl ether, propylene glycol monobutyl ether, green onion powder treated by special siloxane and water-based color paste. The colorful coating disclosed by the invention is gorgeous in color, uniform in color and excellent in weather resistance and stability, and can be widely applied to coating of large traffic equipment such as rail transit, high-speed rails and bullet trains.

Description

Technical Field

[0001] The present invention relates to the technical field of water-based coatings, and in particular to a highly weather-resistant water-based special-effect colorful coating applied to large vehicles such as rail transit and a preparation method thereof. Background Art

[0002] With the rapid development of rail transit in recent years, the demand for rail transit vehicles has also increased. Currently, it is in the stage of speeding up the update from 350 EMUs to 450 EMUs. The demand for customized and personalized body appearance is also more inclined towards colorful development.

[0003] The colorful appearance design makes rail transit vehicles have a strong visual focus and a unique visual experience, which is a new development trend of rail transit vehicle painting.

[0004] Colorful coating is very suitable for rail transit vehicles with long bodies and large areas, especially for rail transit body coating with extremely high color requirements. Due to China's vast territory, rich history and long culture, different places have different aesthetics and requirements for the coating of rail transit vehicles around them. Different colors and patterns are displayed in front of the public, becoming an important part of the overall coating effect. Colorful coatings have the advantages of brilliant colors and easy to express characteristic design, making them the best choice for special coating of rail transit. High-speed rail lines generally have long operating ranges, and the same lines have diverse environmental factors. The starting station is in the northeast, and the terminal station may be in Hainan. Therefore, rail transit vehicle coating requires a coating solution with high weather resistance, brilliant colors, good color stability, and brilliant colors.

[0005] In view of the above practical needs, the present invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a highly weather-resistant water-based special effect colorful paint and a preparation method thereof for use in large vehicles such as rail transit, so as to solve one or more of the above-mentioned prior art problems.

[0007] On the one hand, the present invention provides a highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit, which comprises the following components in parts by weight:

[0008]

[0009]

[0010] In certain embodiments, the highly transparent hydroxylated acrylic emulsion is DSM XK110, and the self-crosslinking acrylic hybrid aqueous aliphatic polyurethane dispersion is TW7061 / 35WA or DAOTAN VTW 6462 / 36WA.

[0011] In certain embodiments, the acrylic dispersion is 9803 or U4190.

[0012] In certain embodiments, the polysiloxane emulsion is 158 water-based defoamer or BYK-011.

[0013] In certain embodiments, the surfactant based on acetylenic diol chemical structure is TEGO Twin 4100.

[0014] In certain embodiments, the polyether siloxane copolymer wetting agent is Surfynol 104E.

[0015] In certain embodiments, the modified polyamide wax is SN-T9769A.

[0016] In certain embodiments, the nonionic modified ethylene-vinyl acetate copolymer wax (EVA) emulsion is AQUATIX 8421.

[0017] In certain embodiments, the triazine ultraviolet absorber is TINUVIN 400, the triazine ultraviolet absorber is TINUVIN 400, and the sebacic acid ester light stabilizer is TINUVIN123DW.

[0018] On the other hand, the present invention provides a method for preparing a highly weather-resistant water-based special effect colorful coating for large vehicles such as rail transit, comprising the following steps:

[0019] (1) Preparation of green onion powder premix slurry treated with special siloxane: under normal temperature and pressure conditions, the green onion powder treated with special siloxane is put into a suitable dispersion tank, and ethylene glycol monobutyl ether is added while being stirred, and the mixture is soaked and stirred for 50 minutes to obtain a green onion powder premix slurry;

[0020] (2) Preparation of base resin liquid:

[0021] (2-1) Under normal temperature and pressure conditions, a highly transparent hydroxy acrylic emulsion is placed in a suitable dispersion tank, and under continuous stirring, a self-crosslinking acrylic hybrid waterborne aliphatic polyurethane dispersion, an acrylic dispersion, dimethylethanolamine, a polysiloxane emulsion, a surfactant based on an acetylene glycol chemical structure, and a polyether siloxane copolymer wetting agent are continuously added to maintain dispersion for 30 minutes;

[0022] (2-2) Continue to add modified polyamide wax, nonionic modified ethylene-vinyl acetate copolymer wax emulsion, triazine ultraviolet absorber, and sebacic acid ester light stabilizer in sequence and maintain high-speed dispersion for 50 minutes to obtain a base resin liquid;

[0023] (3) Preparation of finished products:

[0024] (3-1) Add the prepared green onion powder premix into the prepared base resin liquid and stir thoroughly;

[0025] (3-2) Continue to add propylene glycol monobutyl ether;

[0026] (3-3) Use water-based color paste to adjust the color and obtain a finished colorful paint that can meet the requirements.

[0027] In certain embodiments, the green onion powder treated with special silicone is prepared by the following preparation method:

[0028] A layer of silicon-containing polymer film is coated on the surface of the aluminum onion powder by using silane coupling agent, acrylic resin, ethanol, ethyl acetate and the like.

[0029] This treatment effectively improves the aging resistance and acid, alkali and solvent resistance of the aluminum onion powder, and effectively prevents the surface of the aluminum onion powder from reacting with solvent water and the like during the preparation of the finished product.

[0030] Beneficial effects: The preparation method of the colorful paint of the present invention solves the technical problems of single color, uneven spraying over a large area, poor weather resistance and stability in the prior art. The colorful paint prepared by the preparation method of the present invention has brilliant color, uniform color, excellent weather resistance and stability, and can be widely used in the coating of large-scale transportation equipment such as rail transit high-speed trains. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below through embodiments.

[0032] Example 1

[0033] A highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit, wherein the components are in parts by weight and are prepared by the following method:

[0034] (1) Preparation of green onion powder premix slurry treated with special siloxane: Under normal temperature and pressure conditions, 200 parts of green onion powder treated with special siloxane are added into a suitable dispersion tank, and 400 parts of ethylene glycol monobutyl ether are added while being stirred, and the mixture is soaked and stirred for 50 minutes to obtain a green onion powder premix slurry;

[0035] (2) Preparation of base resin liquid: (2-1) Under normal temperature and pressure conditions, 150 parts of highly transparent hydroxy acrylic emulsion are added into a suitable dispersion tank. Under continuous stirring, 350 parts of self-crosslinking acrylic hybrid waterborne aliphatic polyurethane dispersion, 80 parts of acrylic dispersion having excellent orientation and anti-settling effects on effect pigments such as aluminum powder pearlescent powder, 1 part of dimethylethanolamine, 3 parts of polysiloxane emulsion with excellent stability and long-lasting defoaming properties, 80 parts of surfactant based on acetylene glycol chemical structure, and 3 parts of polyether siloxane copolymer wetting agent are added, and the dispersion is maintained for 30 minutes. (2-2) 200 parts of modified polyamide wax, 300 parts of non-ionic modified ethylene-vinyl acetate copolymer wax (EVA) emulsion, 150 parts of triazine ultraviolet absorber, and 150 parts of nano-encapsulation technology sebacic acid ester light stabilizer are added in sequence, and the dispersion is maintained at high speed for 50 minutes to obtain a base resin liquid.

[0036] (3) Preparation of finished product: (3-1) Add 50 parts of the green onion powder premix to 800 parts of the prepared base resin liquid and stir thoroughly. (3-2) Add 400 parts of propylene glycol monobutyl ether. (3-3) Use 400 parts of water-based color paste for color adjustment to obtain a finished colorful paint that meets the requirements.

[0037] Example 2

[0038] A highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit, wherein the components are in parts by weight and are prepared by the following method:

[0039] (1) Preparation of green onion powder premix slurry treated with special siloxane: Under normal temperature and pressure conditions, 250 parts of green onion powder treated with special siloxane are added into a suitable dispersion tank, and 500 parts of ethylene glycol monobutyl ether are added while being stirred, and the mixture is soaked and stirred for 50 minutes to obtain a green onion powder premix slurry;

[0040] (2) Preparation of base resin liquid: (2-1) Under normal temperature and pressure conditions, 180 parts of highly transparent hydroxy acrylic emulsion are added into a suitable dispersion tank. Under continuous stirring, 400 parts of self-crosslinking acrylic hybrid waterborne aliphatic polyurethane dispersion, 120 parts of acrylic dispersion having excellent orientation and anti-settling effects on effect pigments such as aluminum powder pearlescent powder, 1.5 parts of dimethylethanolamine, 4 parts of polysiloxane emulsion with excellent stability and long-lasting defoaming properties, 100 parts of surfactant based on acetylene glycol chemical structure, and 4 parts of polyether siloxane copolymer wetting agent are added and kept dispersed for 30 minutes. (2-2) 250 parts of modified polyamide wax, 400 parts of non-ionic modified ethylene-vinyl acetate copolymer wax (EVA) emulsion, 180 parts of triazine ultraviolet absorber, and 180 parts of nano-encapsulation technology sebacic acid ester light stabilizer are added in sequence and kept dispersed at high speed for 50 minutes to obtain a base resin liquid.

[0041] (3) Preparation of finished product: (3-1) Add 80 parts of the green onion powder premix to 850 parts of the prepared base resin liquid and stir thoroughly. (3-2) Add 500 parts of propylene glycol monobutyl ether. (3-3) Use 600 parts of water-based color paste for color adjustment to obtain a finished colorful paint that meets the requirements.

[0042] Example 3

[0043] A highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit, wherein the components are in parts by weight and are prepared by the following method:

[0044] (1) Preparation of green onion powder premix slurry treated with special siloxane: Under normal temperature and pressure conditions, 300 parts of green onion powder treated with special siloxane are added into a suitable dispersion tank, and 600 parts of ethylene glycol monobutyl ether are added while being stirred, and the mixture is soaked and stirred for 50 minutes to obtain a green onion powder premix slurry;

[0045] (2) Preparation of base resin liquid: (2-1) Under normal temperature and pressure conditions, 200 parts of highly transparent hydroxy acrylic emulsion are added into a suitable dispersion tank. Under continuous stirring, 450 parts of self-crosslinking acrylic hybrid waterborne aliphatic polyurethane dispersion, 150 parts of acrylic dispersion having excellent orientation and anti-settling effects on effect pigments such as aluminum powder pearlescent powder, 2 parts of dimethylethanolamine, 5 parts of polysiloxane emulsion with excellent stability and long-lasting defoaming properties, 120 parts of surfactant based on acetylene glycol chemical structure, and 5 parts of polyether siloxane copolymer wetting agent are added and kept dispersed for 30 minutes. (2-2) 300 parts of modified polyamide wax, 500 parts of non-ionic modified ethylene-vinyl acetate copolymer wax (EVA) emulsion, 200 parts of triazine ultraviolet absorber, and 200 parts of nano-encapsulation technology sebacic acid ester light stabilizer are added in sequence and kept dispersed at high speed for 50 minutes to obtain a base resin liquid.

[0046] (3) Preparation of finished product: (3-1) Add 100 parts of the green onion powder premix to 900 parts of the prepared base resin liquid and stir thoroughly. (3-2) Add 600 parts of propylene glycol monobutyl ether. (3-3) Use 800 parts of water-based color paste for color adjustment to obtain a finished colorful paint that meets the requirements.

[0047] Performance Testing

[0048] The test results of the finished colorful coatings of Examples 1-3 are shown in the following table:

[0049]

[0050] In summary, the preparation method of the colorful paint of the present invention solves the technical problems of single color, uneven spraying over a large area, poor weather resistance and stability in the prior art. The colorful paint prepared by the preparation method of the present invention has brilliant color, uniform color, excellent weather resistance and stability, and can be widely used in the coating of large-scale transportation equipment such as rail transit high-speed trains.

[0051] The above description is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, and these should also be regarded as within the scope of protection of the invention.

Claims

1. A highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit, characterized in that: According to weight parts, it includes the following components: 150-200 parts of highly transparent hydroxy acrylic emulsion, 2. According to claim 1, a highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit, characterized in that: The highly transparent hydroxyl acrylic emulsion is DSM XK110, and the self-crosslinking acrylic hybrid waterborne aliphatic polyurethane dispersion is TW7061 / 35WA or DAOTAN VTW 6462 / 36WA.

3. According to claim 1, a highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit, characterized in that: The acrylic dispersion is 9803 or U4190.

4. According to claim 1, a highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit, characterized in that: The polysiloxane emulsion is 158 water-based defoamer or BYK-011.

5. The highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit according to claim 1, characterized in that: The surfactant based on acetylenediol chemical structure is TEGO Twin 4100.

6. The highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit according to claim 1, characterized in that: The polyether siloxane copolymer wetting agent is Surfynol 104E.

7. The highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit according to claim 1, characterized in that: The modified polyamide wax is SN-T9769A.

8. The highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit according to claim 1, characterized in that: The nonionic modified ethylene-vinyl acetate copolymer wax (EVA) emulsion is AQUATIX 8421.

9. The highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit according to claim 1, characterized in that: The triazine ultraviolet absorber is TINUVIN 400, the triazine ultraviolet absorber is TINUVIN 400, and the sebacic acid ester light stabilizer is TINUVIN123DW.

10. A method for preparing a highly weather-resistant water-based special effect colorful paint for large vehicles such as rail transit according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) Preparation of green onion powder premix slurry treated with special siloxane: under normal temperature and pressure conditions, aluminum onion powder treated with special siloxane is added into a suitable dispersion tank, and ethylene glycol monobutyl ether is added while being stirred, and the mixture is soaked and stirred for 50 minutes to obtain green onion powder premix slurry; (2) Preparation of base resin liquid: (2-1) Under normal temperature and pressure conditions, a highly transparent hydroxy acrylic emulsion is placed in a suitable dispersion tank, and under continuous stirring, a self-crosslinking acrylic hybrid waterborne aliphatic polyurethane dispersion, an acrylic dispersion, dimethylethanolamine, a polysiloxane emulsion, a surfactant based on an acetylene glycol chemical structure, and a polyether siloxane copolymer wetting agent are continuously added to maintain dispersion for 30 minutes; (2-2) Continue to add modified polyamide wax, nonionic modified ethylene-vinyl acetate copolymer wax emulsion, triazine ultraviolet absorber, and sebacic acid ester light stabilizer in sequence and maintain high-speed dispersion for 50 minutes to obtain a base resin liquid; (3) Preparation of finished products: (3-1) Add the prepared green onion powder premix into the prepared base resin liquid and stir thoroughly; (3-2) Continue to add propylene glycol monobutyl ether; (3-3) Use water-based color paste to adjust the color and obtain a finished colorful paint that can meet the requirements.

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