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Solvent-free epoxy glass flake coating for sea splash zone steel structures and preparation method thereof

A technology of epoxy glass and glass flakes, which is applied in the field of coatings, can solve the problems of antirust fillers containing heavy metals, high content of organic solvents, and high technical requirements, so as to enhance wet adhesion, water resistance and salt spray resistance, and broad The effect of applying the foreground

Active Publication Date: 2016-10-26
洛阳双瑞防腐工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many preparation methods for epoxy glass flake protective coatings for ocean splash areas. Patent 104774527A discloses a preparation method for epoxy glass flake coatings in ocean tidal range / splash areas. Li Min et al. developed a High-performance epoxy glass flakes for marine epoxy (Paint Industry, 2010 (40): 49-53), these preparation methods mainly have the following problems: (1) mainly use organic solvents to reduce viscosity, the content of organic solvents is high, and the used Antirust fillers contain heavy metals, which are harmful to the environment; (2) NORSOK-M501 standard technical requirements are high, and epoxy glass flake coatings prepared by many domestic manufacturers are difficult to meet its certification requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0083] (1) Preparation of modified glass flakes: Weigh 10 parts of 160-mesh glass flakes, 10 parts of 325-mesh glass flakes, 10 parts of reactive diluent, 2 parts of defoamer, 1 part of wetting and dispersing agent, 1 part of leveling agent and 2 parts of silane coupling agent, and then put the above components together in a high-speed disperser for 30-40 minutes. After the dispersion is complete, let it stand for 30 minutes and pack it for use.

[0084] (2) Preparation of component A: Take 30 parts by weight of bisphenol A epoxy resin, 30 parts of hydrogenated bisphenol A epoxy resin, 3 parts of ultraviolet absorber, and 5 parts of thickener Put the thixotropic agent into a high-speed disperser and disperse at high speed for 15 to 20 minutes to fully disperse the thickening thixotropic agent, then add 13 parts of salt spray resistance additive, 5 parts of titanium dioxide, and 5 parts of phosphorus iron powder in parts by weight , 10 parts of mica powder and 10 parts of anti-...

Embodiment 1

[0087] The paint film prepared by embodiment 1 has the following performance indicators:

[0088] 1. At room temperature (25°C), the mixed viscosity of the paint is 2000-2500mPa.s, the viscosity is low, the surface dry time is 1 hour, and the solid dry time is 6 hours. It can be applied without heating treatment, and has good workability;

[0089] 2. After the paint film has been marked, it is soaked in artificial seawater at 40°C for 4200 hours, and the corrosion spread M=7.2mm;

[0090] 3. After scribing the paint film, after 4200h ultraviolet radiation (UVA)-salt spray-freezing (-20°C) cycle aging test, the corrosion spread at the scribing place M=7.6mm;

[0091] 4. Pass the 4200h, 1.05V, 25°C seawater cathodic stripping resistance test, and the stripping equivalent diameter is 15.3mm.

[0092] The construction performance and paint film performance of the coatings prepared according to the formulations of Examples 2 and 3 are similar to those of Example 1, and the product...

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Abstract

The invention discloses a solvent-free epoxy glass flake coating for sea splash zone steel structures and a preparation method thereof. The coating is composed of a component A and a component B. The component A comprises a bisphenol A epoxy resin, a hydrogenated bisphenol A epoxy resin, a reactive diluent, a defoaming agent, a leveling agent, a wetting and dispersing agent, a thickening thixotropic agent, a silane coupling agent, an ultraviolet absorbent, a salt-mist-resistant aid, titanium white, ferrophosphorus powder, mica powder, an antirust filler, 160-mesh glass flakes and 325-mesh glass flakes. The component B comprises a modified polyamide curing agent, a modified phenol formaldehyde amine hardener and an adhesion promoter. The coating is a solvent-free product, and has the advantages of environment friendliness, no toxicity and favorable constructability. The paint film has the advantages of favorable corrosion resistance, favorable seawater immersion resistance, favorable aging resistance and favorable cathodic disbonding resistance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a solvent-free epoxy glass flake coating for steel structures in ocean splash zones and a preparation method thereof. Background technique [0002] The ocean splash zone is a harsh corrosive environment. In addition to being affected by the marine atmospheric environment such as sea salt content, humidity, and temperature, the steel structure in the splash zone is also affected by factors such as seawater immersion, seawater erosion, and frequent dry-wet alternation. , therefore, the corrosion rate of the steel structure in the splash area is much higher than that in other areas. [0003] At present, the certification system is generally adopted for the anticorrosion of steel structures in marine splash areas. The commonly used international standards for market reference include Norsok Standard M-501 "Surface Treatment and Protective Coatings", ISO 12944 "Paints and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D5/10C09D7/12
CPCC08K2201/014C08L2201/08C08L2205/025C09D5/08C09D5/103C09D7/61C09D7/63C09D7/70C09D163/00C08L63/00C08K13/06C08K7/00C08K3/40C08K2003/2241C08K3/24C08K2003/321C08K2003/0812
Inventor 贾新乐张延奎张耿涛胡思堑
Owner 洛阳双瑞防腐工程技术有限公司
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