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Coating composition directly painted on rust layer

A composition and rust layer technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as low tolerance, increased construction costs, and large oxygen diffusion coefficient, so as to improve compatibility and environmental protection Good, high adhesion effect

Inactive Publication Date: 2015-02-18
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of use, it is found that it still has insufficient water vapor and oxygen diffusion, especially compared with chlorinated polyethylene, the oxygen diffusion coefficient is still very large, and at the same time, the metal surface treatment is also required in the construction process. , for some rust layers, residual paint films and some residual low-surface substances on the metal surface, the tolerance is low, and a surface treatment process must be added before construction, which increases the construction cost

Method used

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  • Coating composition directly painted on rust layer
  • Coating composition directly painted on rust layer
  • Coating composition directly painted on rust layer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The coating composition is prepared according to the following composition ratio (mass percentage):

[0021]

[0022] Wherein the dicyandiamide system refers to the mixture of dicyandiamide and methylimidazoline, and the mass ratio of dicyandiamide and methylimidazoline is 6:1.

[0023] Derivatives of melamine refer to substances with the following molecular structure:

[0024]

[0025] Antirust pigment is zinc powder and fiberglass powder, and its mass ratio is zinc powder: fiberglass powder=20:1;

[0026] The filler is a mixture of talcum powder, barium sulfate and iron oxide red, and the mixing mass ratio is: talcum powder: barium sulfate: iron oxide red=20:5:1;

[0027] The components in the above formula are uniformly mixed according to the formula amount, then extruded by a twin-screw extruder, then added, then ground to a particle size of 10 μm, and finally packaged to obtain a coating composition.

[0028] Test results: salt spray resistance test for 332...

Embodiment 2

[0030] The coating composition is prepared according to the following composition ratio (mass percentage):

[0031]

[0032] Wherein the dicyandiamide system refers to the mixture of dicyandiamide and ethyl imidazoline, and the mass ratio of dicyandiamide and ethyl imidazoline is 6:1;

[0033] Derivatives of melamine refer to substances with the following molecular structure:

[0034]

[0035] The anti-rust pigment is zinc phosphate;

[0036] The filler is a mixture of clay and aluminum hydroxide, and its mixing mass ratio is clay: aluminum hydroxide=1: 16;

[0037] Mix the components in the technical formula evenly, then extrude in a twin-screw extruder, then add, grind to a particle size of 30um, and finally pack, you can get the composition of epoxy resin powder coating of chlorinated polyethylene .

[0038] Test results: salt spray resistance test for 290h, the adhesion of the coating on the rust layer after the salt spray test is grade two.

Embodiment 3

[0040] The composition of this coating is prepared according to the following component ratio (mass percentage):

[0041]

[0042] Wherein the dicyandiamide system refers to the mixture of dicyandiamide and methylimidazoline, and the mass ratio of dicyandiamide and methylimidazoline is 6:1;

[0043] Derivatives of melamine refer to substances with the following molecular structure:

[0044]

[0045] The antirust pigments are mica and zinc phosphate, and the mass ratio of mica and zinc phosphate is 3:2;

[0046] The filler is a mixture of antimony trioxide, magnesium hydroxide and diatomaceous earth, and the mass ratio of the mixture is antimony trioxide: magnesium hydroxide: diatomaceous earth=15:6:4;

[0047] Mix the components in the above formula evenly according to the formula amount, then extrude in a twin-screw extruder, then add, grind to a particle size of 13um, and finally pack, you can get epoxy resin powder coating of chlorinated polyethylene Compositions. ...

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Abstract

The invention discloses a coating composition directly painted on a rust layer. The coating composition is prepared from the following components in percentage by mass: 30-40 percent of epoxy resin powder, 5-10 percent of dicyandiamide system, 10-20 percent of chlorinated polyethylene powder, 3-10 percent of melamine derivative, 15-26 percent of anti-rust pigment, 20-31 percent of filler, 1-5 percent of aluminum stearate and 5-10 percent of solubilizer. The coating composition has the advantages of no pollution, high adhesion force, high tolerance on a rust layer of a base material and good corrosion resistance, and can be widely applied to painting on the rust layer.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a coating composition directly coated on a rust layer. Background technique [0002] Epoxy powder is an important anti-corrosion coating widely used on metal. Because of its solvent-free and environmental protection, it has received widespread attention and has been promoted and used in many fields, such as household appliances, oil pipelines, some metal equipment, hardware and so on. Because of its solvent-free, high adhesion and good corrosion resistance, it meets the technical requirements for surface treatment, namely: high protection performance and environmental protection. However, in the process of use, it is found that it still has insufficient water vapor and oxygen diffusion, especially compared with chlorinated polyethylene, the oxygen diffusion coefficient is still very large, and at the same time, the metal surface treatment is also required in the construction process. , ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D123/28C09D7/12C09D5/08
CPCC08L2205/08C09D5/084C09D7/61C09D7/63C09D7/65C09D163/00C08L23/286C08K13/02C08K5/098C08K5/315C08K5/3445C08K3/34C08K2003/3045C08K5/34922
Inventor 高延敏韩莲李丽英王新刚
Owner JIANGSU UNIV OF SCI & TECH