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High solid anticorrosive paint and preparation method thereof

A high solid and coating technology, applied in the field of aluminum alloy, can solve the problems of easy cracking, high hardness, high VOC content, etc., and achieve the effect of improving flexibility, good flexibility and high solid content

Active Publication Date: 2014-09-03
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although high-solid coatings have been used in many fields, due to the oxidation reaction of aluminum alloy with oxygen in the air under natural conditions, it is easy to form an oxide film. To achieve good adhesion, it is rarely used on the surface of aluminum alloy substrates, especially as the solid content of the coating increases, the viscosity of the coating will also increase, which in turn affects the spraying effect of the coating, and even cannot meet the requirements of air spraying. Its application range is affected; in addition, high-solid anti-corrosion coatings generally use epoxy resin with a small molecular weight as the film-forming substance, which has high hardness and poor flexibility after film formation, and is easy to crack under the action of external force, which affects the coating anti-corrosion effect
Chinese patent ZL200510134911.4 introduces a matching coating for aluminum alloy substrates. The epoxy polyamide primer can achieve good adhesion on various substrates such as aluminum alloys, but its construction solid content is low, VOC high content

Method used

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  • High solid anticorrosive paint and preparation method thereof
  • High solid anticorrosive paint and preparation method thereof
  • High solid anticorrosive paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] ①Preparation of component A1

[0031] First, prepare the raw materials of each component according to the formula in Table 1, then, add the prepared formula amount of low molecular weight epoxy resin, modified epoxy resin, reactive diluent, auxiliary agent and solvent into the mixing container, and stir for 15 minutes at a medium speed , then add the formula amount of titanium dioxide and environment-friendly anti-corrosion pigment, after stirring evenly, use a sand mill to grind to a fineness of <40 μm, stir evenly and pass through an 80-mesh filter screen to obtain component A, and pack it for later use;

[0032] Table 1

[0033]

[0034] Note: R902 is the brand name of DuPont’s titanium dioxide product; EFKA5065 is the brand name of Efka’s dispersant product, and it can also be replaced by the company’s EFKA5054, both of which belong to polymer carboxylate compounds.

[0035] ②Preparation of component B1

[0036] First, prepare the raw materials of each component ...

Embodiment 2

[0043] ①Preparation of component A2

[0044] First, prepare each component raw material according to the formula of Table 2, then, make component A2 by the method for Example 1;

[0045] table 3

[0046]

[0047] Note: KD-175×90 is the epoxy resin product brand of Guodu Chemical Company, R-902 is the product brand of DuPont’s titanium dioxide; EFKA5065 is the dispersant product brand of Efka Company, which can also be replaced by the company’s EFKA5054, both of which are It belongs to polymer carboxylate compounds.

[0048] ②Preparation of high solid content anti-corrosion coating

[0049] Before construction, weigh the component A2 prepared in step ① and the component B1 obtained in step ② in Example 1 according to the mass ratio of component A2 and component B1 as 4:1, and mix them evenly to obtain high solid content Anti-corrosion paint, its solid content is 80% (mass), the viscosity is 50 seconds (coating -4 cups, 25 ℃), and the construction period is 6 hours.

[00...

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Abstract

The invention discloses a high solid anticorrosive paint and a preparation method thereof. The paint is composed of a component A and a component B, the component A is composed of the following components in percentage by mass: 15-30% of low molecular weight epoxy resin, 5-10% of modified epoxy resin, 4-8% of a reactive diluent, 5-10% of titanium dioxide, 40-50% of environment-friendly anti-corrosion paint, 0.1-3% of an assistant and the balance of a solvent; and the component B is composed of the following components in percentage by mass: 8-15% of a compound with epoxy groups, 30-40% of aliphatic polyamine with primary amine groups, 8-15% of an amino silane coupling agent and the balance of a compound of solvents. The paint disclosed by the invention has high application solid, low viscosity, good suitability for spraying, good flexibility after film formation on multiple substrates such as aluminum alloy and the like, good performances to direct shock and backlash and excellent anticorrosive property.

Description

technical field [0001] The invention relates to a high-solid anti-corrosion coating suitable for spraying and a preparation method thereof, which can be applied to the surfaces of various substrates, especially aluminum alloys. Background technique [0002] With the increasing awareness of human environmental protection, the restrictions on the content of volatile solvents in coatings are becoming more and more stringent. Despite the development of water-based coatings, powder coatings, and radiation-cured coatings, high-solid anti-corrosion coatings containing certain solvents have their own advantages. Unique features determine its irreplaceable status. Although high-solid coatings have been used in many fields, due to the oxidation reaction of aluminum alloy with oxygen in the air under natural conditions, it is easy to form an oxide film. To achieve good adhesion, it is rarely used on the surface of aluminum alloy substrates, especially as the solid content of the coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08
Inventor 王留方朱亚君张睿刘志远
Owner CHINA NAT OFFSHORE OIL CORP
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