Water-based over-rust coating primer and preparation method thereof

A primer, water-based technology, applied in coatings, anti-corrosion coatings, etc., can solve the problems of easy peeling, high price, unstable effect, etc., and achieve the effect of excellent adhesion and strong penetration

Inactive Publication Date: 2020-11-13
德爱威(中国)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: heavy pollution, does not meet environmental protection requirements
Disadvantages: high price, heavy metal ions such as zinc phosphate, chromium, etc., which are easy to cause heavy metal soil pollution, and need to be used in conjunction with rust conversion agents to achieve rust conversion. Rust spots are prone to poor adhesion in high-humidity environments. peeling problem
Disadvantages: poor adhesion, unstable effect, easy chelation, infiltration and incomplete curing, etc.
There are many organic acids and inorganic acids, heavy metals, etc., which have the risk of polluting the environment
Grinding process is required in the production process, and the process is complicated
CN201610154870.3 discloses a self-healing coating with rust conversion function. The application is a two-component epoxy coating. The application uses a corrosion inhibitor to passivate the rust conversion agent to achieve the purpose of rust conversion. For the purpose of metal surface, this application uses polymer microspheres or nano-containers to encapsulate polymers to achieve self-healing purposes. The process is complicated and the cost is high
CN201710648608.9 discloses a water-based self-repairing coating for fan blades of mechanical cooling ventilation towers. This application is a set of water-based two-component epoxy and two-component polyurethane coatings designed for fan blades. It contains cerium nitrate and has self-repairing properties. But it cannot be painted with rust; the invention has high manufacturing cost, complicated construction and high price

Method used

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  • Water-based over-rust coating primer and preparation method thereof
  • Water-based over-rust coating primer and preparation method thereof
  • Water-based over-rust coating primer and preparation method thereof

Examples

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preparation example Construction

[0038] Another aspect of the present invention provides a method for preparing the above-mentioned primer, the preparation method comprising: uniformly mixing a water-based acrylic emulsion, a film-forming aid, water and other additives to obtain the water-based rust-coating primer.

[0039] In the present invention, preferably, the aqueous acrylic emulsion is filtered first, and then mixed with other raw materials.

[0040] As preferred version: preparation method of the present invention comprises the steps:

[0041] (1) Filter the water-based acrylic emulsion with a 200-mesh filter, then add it to the stirring tank, and rotate it at a low speed until there is a slight vortex;

[0042] (2) then drop into film-forming aid in step (1) gained material, fully stir, form homogeneous phase;

[0043] (3) Add defoamer, wetting agent, leveling agent and thickener to the material obtained in step (2) in order again, fully disperse and stir evenly;

[0044] (4) Finally, add the pure ...

Embodiment 1-3

[0052] The specific formula of the water-based rusty coating primer prepared in Examples 1-3 is shown in Table 1, and the consumption of each component in Table 1 refers to parts by weight.

[0053] Table 1

[0054] name Example 1 Example 2 Example 3 Water-Based Acrylic Emulsion 80 85 80 Coalescing agent 1 0.8 0.8 0.8 Coalescing agent 2 4.6 5.0 4.6 Polyether modified silicone wetting agent 0.3 0.3 0.3 fungicide 0.2 0.2 0.2 Silicone leveling agent 0.2 0.2 0.2 Polyurethane thickener 1.3 2.3 2.3 Organic Polymer Defoamer 0.1 0.15 0.15 pure water 12.7 6.25 11.65

[0055] Wherein, film-forming aid 1 in Table 1 is DPM (dipropylene glycol methyl ether), and film-forming aid 2 is TEXANOL (dodecyl alcohol ester).

[0056] The concrete preparation method of the water-based band rust coating primer provided by above embodiment 1-3 is as follows:

[0057] (1) Filter the water-based acrylic emulsion...

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Abstract

The invention discloses a water-based over-rust coating primer and a preparation method thereof. The primer comprises, by weight, 70-95 parts of a water-based acrylic emulsion, 1.5-6 parts of a coalescing agent, 5-30 parts of water and 0.3-8 parts of other auxiliaries. The primer disclosed by the invention does not use an antirust pigment with heavy metals any more, does not use an antirust pigment containing a zinc element any more, and is thus environment-friendlier; the primer disclosed by the invention does not use tannic acid and other organic acids any more, so no acidic substance residue in any free form exists in a paint film; and the primer disclosed by the invention is excellent in adhesive force, an adhesive force test shows that the adhesive force of the primer is grade 0 (seea scratch test), so the problem of poor adhesive force of a rust conversion coating is solved. The test adhesive force of the primer is still grade 0 after 1000 hours of exposure to salt spray (see adivision test after 1000 hours of exposure to salt spray).

Description

technical field [0001] The invention belongs to the technical field of metal primer coatings, and more specifically relates to a water-based rusty coating primer and a preparation method thereof. Background technique [0002] At present, the market mainly has the following three solutions for rusty coating: (1) oily epoxy or polyurethane rusty coating primer. Advantages: It has been widely used for a long time, with mature technology and stable performance. Disadvantages: It pollutes a lot and does not meet the requirements of environmental protection. (2) Water-based two-component primer for painting with rust. Advantages: Environmental protection, performance equivalent to oily epoxy primer, fast drying, basically does not change the original production rhythm. Disadvantages: high price, heavy metal ions such as zinc phosphate, chromium, etc., which are easy to cause heavy metal soil pollution, and need to be used in conjunction with rust conversion agents to achieve ru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D133/04C09D7/63C09D7/65
CPCC09D5/08C09D133/04C09D7/63C09D7/65C08L2205/035C08L83/12C08L75/04C08K5/06C08K5/101
Inventor 冯小仲王仕林王海青吕晓奇王燕
Owner 德爱威(中国)有限公司
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