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A self-healing high-durability anti-corrosion composite coating and its preparation method

A composite coating and self-repairing technology, which is applied in the direction of anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve problems such as cracking and peeling of paint films, coatings that cannot exert significant energy-saving benefits, and epoxy intermediate paints that cannot be applied. Achieve excellent adhesion and salt spray resistance, excellent solar heat reflection efficiency, and improve the living and working environment

Active Publication Date: 2021-11-19
大钣科技(长兴)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the field of industrial anti-corrosion, the current anti-corrosion coatings and anti-corrosion coating systems generally have the disadvantages of short anti-corrosion life and single function
For example, the salt spray resistance of ordinary epoxy antirust primer is generally lower than 600h; the salt spray resistance of ordinary epoxy zinc-rich primer is generally lower than 1500h; the thickness of ordinary epoxy intermediate paint exceeds 100μm, The problem of paint film cracking and peeling is prone to occur when subjected to impact and collision; the resistance of ordinary polyurethane topcoats to artificial accelerated aging (UVB313 light source) generally does not exceed 1000h
[0003] During the investigation, it was found that ordinary anti-corrosion coatings only have the function of outdoor weather resistance and anti-corrosion. With the development of the times, it is becoming more and more difficult to meet the multi-functional requirements in many application fields.
For example, when repairing in a humid environment, ordinary coatings cannot solve the contradiction between high anti-corrosion performance and wet surfaces; ordinary epoxy intermediate paints cannot be applied to steel surfaces with certain deformations, and cracks are easy to occur after fine cracks appear in the coating Accelerated expansion leads to coating failure; buildings, vehicles and equipment in hot areas cause huge energy consumption for air conditioning in order to reduce the internal temperature, while ordinary coatings cannot exert significant energy-saving benefits; outdoor areas with severe pollution or long service periods A large amount of dust and pollutants are easily bonded to the surface of the coating, resulting in poor decorative effect of the coating, and some pollutants will erode the coating and reduce the service life of the coating

Method used

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  • A self-healing high-durability anti-corrosion composite coating and its preparation method
  • A self-healing high-durability anti-corrosion composite coating and its preparation method
  • A self-healing high-durability anti-corrosion composite coating and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] (1) Preparation of solvent A

[0081] Mix xylene and n-butanol evenly in a weight ratio of 7:3 to obtain solvent A

[0082] (2) Preparation of nano-modified epoxy zinc-rich primer

[0083] Put 8 parts of solvent A, 0.5 parts of dispersant (Efka PU 4010N), 6 parts of solid epoxy resin (DER 671-x75) and 4 parts of modified liquid epoxy resin (KD-175X90) into the stirring tank in sequence, at 250rpm Stir for 10 minutes at a high speed, then add 50 parts of zinc powder, 2.1 parts of nano-ZnO (3005029) and 0.9 parts of nano-Al 2 o 3 (1301001), stirred at 650rpm for 30min, then added 0.3 parts of defoamer (BYK-052N), 2 parts of anti-settling agent (3300), stirred at 450rpm for 20min, and obtained nano-modified epoxy zinc-rich bottom Paint component A; then prepare 3 parts of modified polyamide epoxy curing agent (Ancamide 2634) as component B; mix the above components A and B together, add 15 parts of diluent A, stir for 3 minutes and mix well , to obtain the nano-modifie...

Embodiment 2

[0097] (1) Preparation of solvent A

[0098] Mix xylene and n-butanol evenly in a weight ratio of 7:3 to obtain solvent A

[0099] (2) Preparation of nano-modified epoxy zinc-rich primer

[0100] Put 12 parts of solvent A, 0.5 parts of dispersant (Efka PU 4010N), 6 parts of solid epoxy resin (DER 671-x75) and 12 parts of modified liquid epoxy resin (KD-175X90) into the stirring tank in sequence, at 350rpm Stir for 10 minutes at a high speed, then add 80 parts of zinc powder, 5.6 parts of nano-ZnO (3005029) and 2.4 parts of nano-Al 2 o 3 (1301001), stirred at a speed of 750rpm for 30min, then added 0.3 parts of defoamer (BYK-052N), 2 parts of anti-settling agent (3300), stirred at a speed of 500rpm for 20min, and obtained nano-modified epoxy zinc-rich bottom Paint component A; then prepare 7 parts of modified polyamide epoxy curing agent (Ancamide 2634) as component B; mix the above components A and B together, add 25 parts of thinner A, stir for 3 minutes and mix well , to...

Embodiment 3

[0114] (1) Preparation of solvent A

[0115] Mix xylene and n-butanol evenly in a weight ratio of 7:3 to obtain solvent A

[0116] (2) Preparation of nano-modified epoxy zinc-rich primer

[0117] Put 10 parts of solvent A, 0.5 parts of dispersant (Efka PU 4010N), 8 parts of solid epoxy resin (DER 671-x75) and 6 parts of modified liquid epoxy resin (KD-175X90) into the stirring tank in sequence, at 300rpm Stir for 10 minutes at a high speed, then add 70 parts of zinc powder, 4.2 parts of nano-ZnO (3005029) and 1.8 parts of nano-Al 2 o 3 (1301001), stirred at 700rpm for 30min, then added 0.3 parts of defoamer (BYK-052N), 2 parts of anti-settling agent (3300), stirred at 450rpm for 20min, and obtained nano-modified epoxy zinc-rich bottom Paint component A; then prepare 5 parts of modified polyamide epoxy curing agent (Ancamide 2634) as component B; mix the above components A and B together, add 20 parts of diluent A, stir for 3 minutes and mix well , to obtain the nano-modifi...

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Abstract

The invention relates to a self-repairing high-durability anti-corrosion composite coating, which comprises a nano-modified epoxy zinc-rich primer layer, an elastic self-repairing epoxy micaceous iron intermediate paint layer and an aliphatic polyurethane topcoat layer sequentially from bottom to top. The primer layer is made of solid epoxy resin, modified liquid epoxy resin, zinc powder, nano metal oxide, solvent, dispersant, defoamer, anti-settling agent, epoxy curing agent and thinner A; intermediate paint The layer is made of solid epoxy resin, toughened epoxy resin, micaceous iron oxide, self-healing microcapsules, solvent, dispersant, defoamer, anti-settling agent, modified polyamine curing agent and thinner A; topcoat The layer is made of modified hydroxyacrylic resin, heat reflective pigment, solvent B, anti-aging additive, dispersant, defoamer, anti-settling agent, wetting and dispersing agent, aliphatic isocyanate curing agent and thinner B. The composite coating of the invention has excellent adhesion, salt spray resistance, flexibility and heat reflection efficiency.

Description

technical field [0001] The invention belongs to the technical field of paint coatings, and in particular relates to a self-repairing high-durability anti-corrosion composite coating and a preparation method thereof. Background technique [0002] In the field of industrial anti-corrosion, the current anti-corrosion coatings and anti-corrosion coating systems generally have the disadvantages of short anti-corrosion life and single function. For example, the salt spray resistance of ordinary epoxy antirust primers is generally lower than 600h; the salt spray resistance of ordinary epoxy zinc-rich primers is generally lower than 1500h; the thickness of ordinary epoxy intermediate paints exceeds 100μm, The problem of paint film cracking and falling off is prone to occur when subjected to impact and collision; the artificial accelerated aging resistance of ordinary polyurethane topcoat (UVB313 light source) generally does not exceed 1000h. [0003] During the investigation, it wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D175/04C09D5/10C09D5/33C09D7/61
CPCC08K2003/0893C08K2003/2241C08K2003/2272C08K2003/2296C08K2201/011C08L2205/025C09D5/004C09D5/106C09D163/00C09D175/04C09D7/61C08L63/00C08K3/08C08K3/22
Inventor 江林峰陈雷李一新
Owner 大钣科技(长兴)有限公司