A kind of uv cathodic electrophoretic paint and its coating process

A cathodic electrophoresis and process technology, applied in electrophoretic coatings, coatings and other directions, can solve the problems of increasing the difficulty and cost of processing, low utilization rate of original paint, harsh operating environment, etc., to simplify curing equipment, high utilization rate of coatings, good bonding effect

Inactive Publication Date: 2017-06-16
东莞市霖辉金属表面处理材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are environmental pollution problems caused by the volatilization of organic solvents in spraying primers. The operating environment is harsh, the utilization rate of the original paint is low, and the material waste is large, which increases the difficulty and cost of processing.

Method used

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  • A kind of uv cathodic electrophoretic paint and its coating process
  • A kind of uv cathodic electrophoretic paint and its coating process
  • A kind of uv cathodic electrophoretic paint and its coating process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Embodiment 1: zinc alloy substrate electrophoresis plus vacuum electroplating process steps:

[0087] (1) Ultrasonic (hot soak) degreasing and wax removal

[0088] Aqueous solution formula: sodium carbonate (Na 2 CO 3 ) 20g / L sodium silicate (Na 2 SiO 3 ) 20g / L Surfactant 1g / L Operating temperature: 40°C Time: until clean Equipment requirements: use with ultrasonic

[0089] (2) Cathodic electrolytic degreasing

[0090] Aqueous solution formula: sodium hydroxide (NaOH) 1g / L sodium carbonate (NaOH) 2 CO 3 ) 5g / L trisodium phosphate (Na 3 PO 4 )20g / L Surfactant 1g / L Operating temperature: 40℃ Cathode current density: 5A / dm 2 Time: 0.5min

[0091] (3) Washing

[0092] running water

[0093] (4) Film removal (light emitting)

[0094] Aqueous solution formula: nitric acid (HNO 3 ) 2% (weight percent) Temperature: room temperature Time: 2s

[0095] (5) Washing

[0096] running water

[0097] (6) Passivation

[0098] Aqueous solution formula: chromic anhydride...

Embodiment 2

[0127] Embodiment 2: copper and copper alloy substrate electrophoresis plus vacuum electroplating process steps:

[0128] (1) Ultrasonic (hot soak) degreasing and wax removal

[0129] Aqueous solution formulation: Sodium Hydroxide (NaOH) 10g / L Sodium Carbonate (NaOH) 2 CO 3 ) 55g / L trisodium phosphate (Na 3 PO 4 )55g / L sodium silicate (Na 2 SiO 3) 7.5g / L Operating temperature: 75°C Time: until cleaning Equipment requirements: use with ultrasonic

[0130] (2) Cathodic electrolytic degreasing

[0131] Aqueous solution formulation: Sodium Hydroxide (NaOH) 7.5g / L Sodium Carbonate (NaOH) 2 CO 3 ) 15g / L sodium silicate (Na 2 SiO 3 )25g / L Surfactant 1.5g / L Operating temperature: 60℃ Cathode current density: 7.5A / dm 2 Time: 1.3min

[0132] (3) Washing

[0133] running water

[0134] (4) activation

[0135] Aqueous solution formula: concentrated sulfuric acid (H 2 SO 4 ) 7.5% (volume) Temperature: room temperature

[0136] (5) Washing

[0137] running water

[0138...

Embodiment 3

[0166] Embodiment 3: pure aluminum substrate electrophoresis plus vacuum electroplating industrial steps:

[0167] (1) Ultrasonic (hot soak) degreasing and wax removal

[0168] Aqueous solution formula: sodium carbonate (Na 2 CO 3 ) 50g / L trisodium phosphate (Na 3 PO 4 ) 50g / L sodium silicate (Na 2 SiO 3 )30g / L Operating temperature: 80°C Time: until cleaning Equipment requirements: use with ultrasonic

[0169] (2) washing

[0170] running water

[0171] (3) Microetching

[0172] Aqueous solution formula: Sodium Hydroxide (NaOH) 80g / L Temperature: 70℃ Time: 30s

[0173] (4) Washing

[0174] running water

[0175] Aqueous solution formula: concentrated nitric acid (HNO 3 ) 500g / L Temperature: room temperature Time: 15s

[0176] (6)Washing

[0177] running water

[0178] (7) Anodizing

[0179] Aqueous solution formula: sulfuric acid (H 2 SO 4 ) 200g / L aluminum ion (Al 3+ ) 15g / L Temperature: 25°C Current density 1.5g / L Voltage 20v Power supply: DC Time: 40min ...

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PUM

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Abstract

The present invention belongs to the technical field of coating and electrophoresis paint, and discloses a UV cathode electrophoresis paint and a coating process of same. The UV cathode electrophoresis paint consists of components such as UV cathode electrophoresis paint resin, a curing agent, a co-solvent, and the like, wherein the UV cathode electrophoresis paint resin consists of methacrylate, N-methylolacrylamide, acrylic acid, and styrene and the like. The UV cathode electrophoresis paint is environmentally friendly in process, can be used as a vacuum electroplating base layer, and does no cracking, shedding, or yellowing. A paint coating has good uniformity, high luminance, high flexibility, and high throwing power. The coating process comprises such steps as: pretreatment, UV cathode electrophoresis, water washing, UV curing, vacuum electroplating and the like, the process does not use conventional water electroplating or coating for priming, and can obtain good bonding force, precision and bright crystallization, and decorative and ideal appearance with metallic texture that are same as the water electroplating, and can replace the conventional water electroplating.

Description

technical field [0001] The invention belongs to the technical field of electrophoresis and vacuum electroplating, and discloses a UV cathodic electrophoretic paint and a coating process thereof. Background technique [0002] A variety of functional and decorative coatings can be obtained by traditional water electroplating on the surface of metal or alloy substrates. Among them, copper, nickel, and chromium plating systems are widely used, but traditional water electroplating is polluted to the environment and requires the use of some highly toxic raw materials. , has been restricted by the state and local governments at all levels, and electroplating processing enterprises have gradually been eliminated due to high sewage treatment costs, high energy consumption, and large waste of water resources. The European Union also has strict restrictions on the content of hexavalent chromium and nickel in imported products, which makes water electroplating gradually become a sunset ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/44C09D133/10C09D133/12C09D7/12C08F220/34C08F220/28C08F220/58C08F220/06C08F212/08
Inventor 谢辉
Owner 东莞市霖辉金属表面处理材料有限公司
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