Production method of antirust corrosion-resistant water-based industrial paint for trailer

Abstract

The invention discloses a production method of anti-rust and corrosion-resistant water-based industrial paint for a trailer, and belongs to the technical field of paints.The production method of the anti-rust and corrosion-resistant water-based industrial paint for the trailer comprises the steps that water-based polyurethane resin and water-based epoxy resin are adopted for the anti-rust and corrosion-resistant water-based industrial paint for the trailer, and blending is conducted to obtain the anti-rust and corrosion-resistant water-based industrial paint for the trailer; nCO in polyurethane can react with-OH and epoxy groups in epoxy resin, so that the length of a chain segment is effectively widened, a toughening effect is generated, and the epoxy resin is used for protection and decoration of a semitrailer body and systematic research on construction of matched paint and a coating. Through a whole vehicle coating test, the prepared water-based two-component primer and finish paint are good in construction performance, the comprehensive performance of the coating is excellent, and the technical index requirements of a semitrailer coating are met. Compared with a solvent type coating, the developed coating has the advantages that the VOC emission is obviously reduced in the coating process, and the environment-friendly coating of the trailer is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of water-based industrial paints, in particular to a method for producing rust-proof and corrosion-resistant water-based industrial paint for trailers. Background Art

[0002] With the continuous increase in trailer production, the amount of coatings used is also growing, and the market prospects are good. Trailer coatings mainly use a two-coat system with primer and topcoat used separately, among which the primer usually uses a two-component epoxy coating and the topcoat uses a two-component polyurethane coating. At present, solvent-based coatings are still the mainstream, but because they contain a large amount of volatile organic compounds (VOC) and low toxic gas pollutants (HAP), the coating process will cause serious pollution to the environment and threaten human health. At the same time, the application of environmentally friendly and water-based coatings will become a trend of future development. Water-based coatings have achieved relatively successful use cases in passenger car and container coating fields due to their environmental protection characteristics and comprehensive performance. In the fields of trailers, semi-trailers and trailer machinery, water-based industrial coatings also have greater promotion potential. When a semi-trailer is driving at high speed, the sand and gravel splashed on the road will cause a strong impact on the body of the vehicle, which will cause serious rust after damage, directly affecting the service life of the vehicle. In addition, the vibration and impact noise generated by the trailer driving will also directly affect the comfort of the passengers in the vehicle. Those skilled in the art are in urgent need of developing a method for producing a rust-proof and corrosion-resistant water-based industrial paint for trailers to meet existing usage needs and performance requirements. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide a method for producing rust-proof and corrosion-resistant water-based industrial paint for trailers.

[0004] The present invention is achieved through the following technical solutions: A method for producing a rust-proof and corrosion-resistant water-based industrial paint for a trailer comprises the following steps: 1. Add dispersant, waterborne polyurethane resin, anti-corrosion filler and pigment to waterborne epoxy resin while stirring, control the speed of overtime at 2000-3000rpm, filter to obtain resin premix components, and set aside; 2. Add leveling agent, thickener, defoamer and antioxidant to deionized water in turn, stir and mix thoroughly at a speed of 800-1200rpm, let stand for 2h, and obtain auxiliary agent premix components, and set aside; 3. Mixing before coating use: Mix the resin premix components and auxiliary agent premix components and add them to the waterborne curing agent to fully mix. The paint is stirred at a speed of 300-500 rpm, and filtered to obtain a rust-proof and corrosion-resistant water-based industrial paint for trailers with a solid content of 40-50%. The paint comprises 45-55 parts of water-based epoxy resin, 45-55 parts of water-based polyurethane resin, 5-10 parts of anti-corrosion filler, 10-15 parts of pigment, 0.4-1.2 parts of dispersant, 0.2-0.5 parts of leveling agent, 0.1-0.3 parts of defoamer, 0.5-1.5 parts of thickener, 15-20 parts of water-based epoxy curing agent, and 0.5-1 part of antioxidant.

[0005] Trailers include full trailers and semi-trailers.

[0006] Furthermore, the waterborne polyurethane resin is CF-101W or JF5415.

[0007] Furthermore, the waterborne epoxy resin is CYDWER-3120 or CYDWER-3140 or ADL-1100.

[0008] Furthermore, the anti-corrosion filler is zinc oxide modified aluminum tripolyphosphate, and the pigment is red iron oxide.

[0009] Furthermore, the waterborne epoxy curing agent is Anquamine 419.

[0010] Furthermore, the thickener is PU426.

[0011] Furthermore, the dispersant is one of aqueous dispersant P-998, aqueous dispersant CN-553 or aqueous dispersant P-19.

[0012] Furthermore, the leveling agent is BYK-333 or BYK-359.

[0013] Furthermore, the antioxidant is antioxidant 264.

[0014] Furthermore, the defoaming agent is RS-1345 or SN-345.

[0015] The beneficial effects of the present invention are: Compared with the prior art, the present invention has the following advantages: The present invention discloses a method for producing a rust-proof and corrosion-resistant water-based industrial paint for trailers. The rust-proof and corrosion-resistant water-based industrial paint for trailers is produced by using a water-based polyurethane resin and a water-based epoxy resin. By blending the two, the -NCO in the polyurethane can react with the -OH and epoxy groups in the epoxy resin, thereby effectively widening the length of the chain segment and producing a toughening effect. The paint is used for the protection and decoration of the semi-trailer body, and the construction and coating of the supporting coating are systematically studied. Through the whole vehicle painting test, the water-based two-component primer and topcoat prepared in this paper have good construction performance, and the comprehensive performance of the coating is excellent, meeting the technical index requirements of the semi-trailer coating. Compared with solvent-based coatings, the coating process of the developed coating significantly reduces VOC emissions, realizing environmentally friendly painting of trailers. DETAILED DESCRIPTION

[0016] The present invention is described below with specific examples, but is not intended to be limiting of the present invention. Example 1

[0017] Raw materials: JF5415 waterborne polyurethane resin from Zibo Jiafeng Chemical Technology Development Co., Ltd.; waterborne polyurethane resin is Changyi Kafuluo CF-101W. Waterborne epoxy resin is Hunan Petrochemical CYDWER-3120. Anti-corrosion filler is zinc oxide modified aluminum tripolyphosphate APZ-99, Anqing Changhong Chemical Pigment Grade I iron oxide red. Waterborne epoxy curing agent Anquamine 419. Thickener is Mingjia PU426. Waterborne dispersant P-998 from Changfeng Chemical Plant; leveling agent is BYK-33; Liansheng antioxidant 264, Renxin RS-1345.

[0018] The production method of the rust-proof and corrosion-resistant water-based industrial paint for trailers comprises the following steps: 1. Add dispersant, waterborne polyurethane resin, anti-corrosion filler and pigment to waterborne epoxy resin while stirring, control the overtime speed at 2500rpm, filter to obtain resin premix components, and set aside; 2. Add leveling agent, thickener, defoamer and antioxidant to deionized water in turn, stir and mix them at a speed of 1000rpm, let stand for 2h, and obtain auxiliary agent premix components, and set aside; 3. Mixing before use of coating: mix the resin premix components and auxiliary agent premix components and add them to the waterborne curing agent and stir them thoroughly at a speed of 400rpm. After filtering, a trailer anti-rust and corrosion-resistant waterborne industrial paint with a solid content of 45% is obtained; by weight, the waterborne epoxy resin is 50 parts, the waterborne polyurethane resin is 50 parts, the anti-corrosion filler is 6 parts, the pigment is 12 parts, the dispersant is 0.8 parts, the leveling agent is 0.4 parts, the defoamer is 0.2 parts, the thickener is 1 part, the waterborne epoxy curing agent is 18 parts, and the antioxidant is 0.75 parts. Example 2

[0019] Raw materials: JF5415 water-based polyurethane resin from Zibo Jiafeng Chemical Technology Development Co., Ltd.; water-based epoxy resin is CYDWER-3120 from Hunan Petrochemical; anti-corrosion filler is zinc oxide-modified aluminum tripolyphosphate APZ-99, and the pigment is red iron oxide; water-based epoxy curing agent Anquamine 419; thickener is Mingjia PU426; water-based dispersant P-998 from Changfeng Chemical Plant; leveling agent is BYK-333; antioxidant Lanxess antioxidant 264, defoaming agent Renxin RS-1345.

[0020] The production method of the rust-proof and corrosion-resistant water-based industrial paint for trailers comprises the following steps: 1. Add dispersant, waterborne polyurethane resin, anti-corrosion filler and pigment to waterborne epoxy resin while stirring, control the overtime speed at 2500rpm, filter to obtain resin premix components, and set aside; 2. Add leveling agent, thickener, defoamer and antioxidant to deionized water in turn, stir and mix them at a speed of 1000rpm, let stand for 2h, and obtain auxiliary agent premix components, and set aside; 3. Mixing before use of coating: mix the resin premix components and auxiliary agent premix components and add them to the waterborne curing agent and stir them thoroughly at a speed of 400rpm. After filtering, a trailer anti-rust and corrosion-resistant waterborne industrial paint with a solid content of 45% is obtained; by weight, the waterborne epoxy resin is 50 parts, the waterborne polyurethane resin is 50 parts, the anti-corrosion filler is 7 parts, the pigment is 12 parts, the dispersant is 0.8 parts, the leveling agent is 0.3 parts, the defoamer is 0.2 parts, the thickener is 1.2 parts, the waterborne epoxy curing agent is 18 parts, and the antioxidant is 0.75 parts. Example

[0021] Raw materials: water-based polyurethane resin is Changyi Kafuluo CF-101W. Water-based epoxy resin Hunan Petrochemical CYDWER-3140; anti-corrosion filler is zinc oxide modified aluminum tripolyphosphate APZ-99, Tongling Ruilai pigment iron oxide red 130A. Water-based epoxy curing agent Anquamine 419. Thickener is Mingjia PU426. Jiedong Tianyin water-based dispersant CN-553; leveling agent BYK-359; Lanxess antioxidant 264, defoaming agent is Renxin RS-1345.

[0022] The production method of the rust-proof and corrosion-resistant water-based industrial paint for trailers comprises the following steps: 1. Add dispersant, waterborne polyurethane resin, anti-corrosion filler and pigment to waterborne epoxy resin while stirring, control the overtime speed at 2000rpm, filter to obtain resin premix components, and set aside; 2. Add leveling agent, thickener, defoamer and antioxidant to deionized water in turn, stir and mix them at a speed of 800rpm, let stand for 2h, and obtain auxiliary agent premix components, and set aside; 3. Mixing before use of coating: mix the resin premix components and auxiliary agent premix components and add them to the waterborne curing agent and stir them thoroughly at a speed of 300rpm. After filtering, a trailer anti-rust and corrosion-resistant waterborne industrial paint with a solid content of 40% is obtained; by weight, the waterborne epoxy resin 45 parts, the waterborne polyurethane resin 45 parts, the anti-corrosion filler 5 parts, the pigment 10 parts, the dispersant 0.4 parts, the leveling agent 0.2 parts, the defoamer 0.1 parts, the thickener 0.5 parts, the waterborne epoxy curing agent 15 parts, and the antioxidant 0.5 parts. Example 3

[0023] Raw materials: JF5415 waterborne polyurethane resin from Zibo Jiafeng Chemical Technology Development Co., Ltd.; waterborne epoxy resin from Nanchang Anyi Andeli ADL-1100. Anti-corrosion filler is zinc oxide modified aluminum tripolyphosphate APZ-99, and the pigment is first-class iron oxide red from Anqing Changhong Chemical Pigment. Waterborne epoxy curing agent Anquamine 419. Thickener is Mingjia PU426; waterborne dispersant P-19 from Changfeng Chemical Plant; leveling agent BYK-359; Lanxess antioxidant 264, defoaming agent Nopco SN-345.

[0024] The production method of the rust-proof and corrosion-resistant water-based industrial paint for trailers comprises the following steps: 1. Add dispersant, waterborne polyurethane resin, anti-corrosion filler and pigment to waterborne epoxy resin while stirring, control the overtime speed at 3000rpm, filter to obtain resin premix components, and set aside; 2. Add leveling agent, thickener, defoamer and antioxidant to deionized water in turn, stir and mix them at a speed of 1200rpm, let stand for 2h, and obtain auxiliary agent premix components, and set aside; 3. Mixing before use of coating: mix the resin premix components and auxiliary agent premix components and add them to the waterborne curing agent and stir them thoroughly at a speed of 500rpm. After filtering, a trailer anti-rust and corrosion-resistant waterborne industrial paint with a solid content of 50% is obtained; by weight, the waterborne epoxy resin is 55 parts, the waterborne polyurethane resin is 55 parts, the anti-corrosion filler is 10 parts, the pigment is 15 parts, the dispersant is 1.2 parts, the leveling agent is 0.5 parts, the defoamer is 0.3 parts, the thickener is 1.5 parts, the waterborne epoxy curing agent is 20 parts, and the antioxidant is 1 part.

[0025] The performance of the anti-rust and corrosion-resistant water-based industrial paint for trailers of Examples 1 to 3 was tested. The test results are shown in Table 1. Table 1 Performance test results of anti-rust and corrosion resistant water-based industrial paint for trailers of Examples 1 to 3

[0026] Note: GB / T 1725-2007 Determination of non-volatile matter content of paints, varnishes and plastics; GB / T 1724-2019 Determination of grinding fineness of paints, varnishes and printing inks; GB / T 1726-1979 Determination of hiding power of coatings; GB / T 1730-2007 Pendulum damping test for paints and varnishes; GB / T 1731-2020 Determination of flexibility of paint and putty films; GB / T1732-2020 Determination of impact resistance of paint films; GB / T 1720-2020 Paint film circle test; GB / T 23986.2-2023 Determination of volatile organic compound (VOC) and / or semi-volatile organic compound (SVOC) content of paints and varnishes Part 2: Gas chromatography.

Claims

1. A method for producing a rust-proof and corrosion-resistant water-based industrial paint for trailers, characterized in that: The following steps are involved:

1. Add dispersant, waterborne polyurethane resin, anti-corrosion filler and pigment to waterborne epoxy resin while stirring, control the speed of overtime at 2000-3000rpm, filter to obtain resin premix components, and set aside; 2. Add leveling agent, thickener, defoamer and antioxidant to deionized water in turn, stir and mix thoroughly at a speed of 800-1200rpm, let stand for 2h, and obtain auxiliary premix components, and set aside; 3. Mixing before coating use: Mix the resin premix components and auxiliary premix components and add them to the waterborne curing agent to fully The paint is stirred at a speed of 300-500 rpm, and filtered to obtain a rust-proof and corrosion-resistant water-based industrial paint for trailers with a solid content of 40%-50%. The paint comprises 45-55 parts of water-based epoxy resin, 45-55 parts of water-based polyurethane resin, 5-10 parts of anti-corrosion filler, 10-15 parts of pigment, 0.4-1.2 parts of dispersant, 0.2-0.5 parts of leveling agent, 0.1-0.3 parts of defoamer, 0.5-1.5 parts of thickener, 15-20 parts of water-based epoxy curing agent, and 0.5-1 part of antioxidant.

2. The method for producing the rust-proof and corrosion-resistant water-based industrial paint for trailers according to claim 1, characterized in that: The waterborne polyurethane resin is CF-101W or JF5415.

3. The method for producing the rust-proof and corrosion-resistant water-based industrial paint for trailers according to claim 1, characterized in that: The waterborne epoxy resin is CYDWER-3120 or CYDWER-3140 or ADL-1100.

4. The method for producing the rust-proof and corrosion-resistant water-based industrial paint for trailers according to claim 1, characterized in that: The anti-corrosion filler is zinc oxide modified aluminum tripolyphosphate, and the pigment is red iron oxide.

5. The method for producing the rust-proof and corrosion-resistant water-based industrial paint for trailers according to claim 1, characterized in that: The waterborne epoxy curing agent is Anquamine 419.

6. The method for producing the rust-proof and corrosion-resistant water-based industrial paint for trailers according to claim 1, characterized in that: The thickener is PU426.

7. The method for producing the rust-proof and corrosion-resistant water-based industrial paint for trailers according to claim 1, characterized in that: The dispersant is one of aqueous dispersant P-998, aqueous dispersant CN-553 or aqueous dispersant P-19.

8. The method for producing the rust-proof and corrosion-resistant water-based industrial paint for trailers according to claim 1, characterized in that: The leveling agent is BYK-333 or BYK-359.

9. The method for producing the rust-proof and corrosion-resistant water-based industrial paint for trailers according to claim 1, characterized in that: The antioxidant is antioxidant 264.

10. The method for producing the rust-proof and corrosion-resistant water-based industrial paint for trailers according to claim 1, characterized in that: The defoaming agent is RS-1345 or SN-345.

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