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Heavy-duty anti-corrosion phenolic epoxy coating

A technology of phenolic epoxy and coatings, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of inability to provide curing conditions after heating and insufficient curing of coating films, and achieve improved anti-corrosion performance and excellent durability. Chemical and temperature resistance, effect of improving wetting and dispersibility

Active Publication Date: 2013-04-24
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, novolac epoxy coatings generally use aromatic amines as curing agents. Therefore, there is an obvious defect, that is, the coating film cannot be fully cured under normal temperature conditions. Generally, it needs to be cured after heating to ensure its chemical resistance and resistance. temperature, and most of the actual engineering construction cannot provide curing conditions after heating; in addition, because of the carcinogenicity of aromatic amines, it is gradually banned from use

Method used

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  • Heavy-duty anti-corrosion phenolic epoxy coating
  • Heavy-duty anti-corrosion phenolic epoxy coating
  • Heavy-duty anti-corrosion phenolic epoxy coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～2

[0022] Embodiment 1~2 prepares heavy anti-corrosion phenolic epoxy coating

[0023] Component A of the coating of the present invention consists of the following raw materials in parts by weight: 25 to 35 Norvolac epoxy resins, 0.5 to 0.8 wetting and dispersing agents, 0.5 to 1.0 organic bentonite anti-settling agents, and 0.5 to defoaming agents ~0.8, pigment 10~15, filler 40~50, diluent 10~20, among which the epoxy functionality of Norvolac epoxy resin is 2.5~3.0, the epoxy equivalent is 172~179; the wetting and dispersing agent is DISPERBYK-2164 of BYK Company; the defoamer is BYK-A 530 of BYK Company; component B consists of the following raw materials in parts by weight: alicyclic amine 50-60, bisphenol F epoxy resin 10-20, Plasticizer benzyl alcohol 15-20, diluent 4-8, adhesion promoter aminosilane coupling agent 3-5, accelerator salicylic acid 1-3.

[0024] (1) Preparation of component A

[0025] The specific formulation of component A is shown in Table 1.

[0026] T...

preparation Embodiment 1

[0039] 1. Preparation Example 1 heavy anti-corrosion phenolic epoxy coating

[0040] According to the ratio of the epoxy equivalent of component A to the active hydrogen equivalent of component B as 1:0.9, calculate the amount of component A and component B in Example 1 and weigh them, and then mix them thoroughly to get the example 1-weight anti-corrosion phenolic epoxy coating, placed for curing for 10 minutes, ready to use.

preparation Embodiment 2

[0041] 2. Preparation Example 2 heavy anti-corrosion phenolic epoxy coating

[0042] According to the ratio of the epoxy equivalent of component A to the active hydrogen equivalent of component B as 1:0.9, calculate the amount of component A and component B in Example 2 and weigh them, and then mix them thoroughly to get the example 2 layers of anti-corrosion phenolic epoxy coating, placed for 10 minutes of aging, it can be used.

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Abstract

The invention relates to a heavy-duty anti-corrosion phenolic epoxy coating. A component A consists of the following raw materials in parts by weight: 25-35 parts of novolac epoxy resin, 0.5-0.8 part of wetting and dispersing agent, 0.5-1.0 part of organic bentonite serving as an anti-settling agent, 0.5-0.8 part of antifoaming agent, 10-15 parts of pigment, 40-50 parts of filler and 10-20 parts of diluting agent, wherein the epoxy functionality of the novolac epoxy resin is 2.5-3.0; the epoxy equivalent weight is 172-179; the wetting and dispersing agent is DISPERBYK-2164 of BYK company; theantifoaming agent is BYK-A 530 of the BYK company; and a component B consists of the following raw materials in parts by weight: 50-60 parts of alicyclic amine, 10-20 parts of bisphenol F epoxy resin, 15-20 parts of benzyl alcohol serving as a plasticizer, 4-8 parts of diluting agent, 3-5 parts of adhesion promoter amino silane coupling agent and 1-3 parts of salicylic acid serving as a promoter.The coating is cured at normal temperature and the requirements of heavy-duty anti-corrosion environment and environmental protection are met.

Description

technical field [0001] The invention relates to a heavy-duty anti-corrosion phenolic epoxy coating, in particular to a heavy-duty anti-corrosion phenolic epoxy coating which can be fully cured under normal temperature conditions and has excellent chemical resistance and corrosion resistance. Background technique [0002] As we all know, epoxy coatings have good comprehensive mechanical properties, high adhesion, small shrinkage, and excellent corrosion resistance, and are widely used in the field of anti-corrosion coatings industry, especially in the field of heavy anti-corrosion. The most commonly used epoxy resin in epoxy coatings is bisphenol A type epoxy resin. However, some heavy anti-corrosion environments have the following requirements for the coating film: ① certain temperature resistance requirements (including heat-resistant electrolyte); ② excellent chemical resistance, including acids, alkalis, salts, oxidizing substances, and various solvents , crude oil, etc....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/04C09D163/02C09D5/08
Inventor 方健君马胜军李敏王秀娟常安乐
Owner CHINA NAT OFFSHORE OIL CORP
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