Organic silicon modified bi-component solvent-based polyurethane anti-corrosive coating and preparation method thereof

A technology of anti-corrosion coating and modified polyester, which is applied in the direction of polyurea/polyurethane coating, anti-corrosion coating, coating, etc., can solve the problems of high cost, anti-corrosion failure of chimneys, etc., and achieve the reduction of internal stress, easy anti-corrosion construction, high solid The effect of content

Inactive Publication Date: 2011-06-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the chimney anticorrosion project not only has the economic problem of high cost, but also lacks scientific analysis and experimental research on the chara

Method used

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  • Organic silicon modified bi-component solvent-based polyurethane anti-corrosive coating and preparation method thereof
  • Organic silicon modified bi-component solvent-based polyurethane anti-corrosive coating and preparation method thereof
  • Organic silicon modified bi-component solvent-based polyurethane anti-corrosive coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1:

[0038] a. Preparation of organosilicon oligomer: The raw materials of each composition are calculated by mass percentage: 60% silane coupling agent, 10% deionized water, and 30% anhydrous ethanol.

[0039] Add 60% silane coupling agent and 15% anhydrous ethanol to the three-necked flask. After the temperature rises to 70℃, add dropwise a mixed solution of 10% deionized water and 15% anhydrous ethanol, and control the dripping speed within half an hour Finish adding. After continuing the reaction for 3 hours, the reaction was stopped. Then distill under normal pressure, and stop the distillation after the temperature of the remaining liquid in the bottle rises to 125°C. Prepare silicone oligomer.

[0040] b. Preparation of silicone-modified polyester polyol: The raw materials of each composition are calculated by mass percentage: 10% silicone oligomer, 35% polyester polyol, and 55% mixed solvent.

[0041] Add silicone oligomer, polyester polyol and solvent to a f...

Example Embodiment

[0046] Example 2:

[0047] a. Preparation of organosilicon oligomer: The raw materials of each composition are calculated by mass percentage: 65% of silane coupling agent, 5% of deionized water, and 30% of absolute ethanol.

[0048] Add 65% silane coupling agent and 20% anhydrous ethanol to a three-necked bottle. After the temperature rises to 60°C, add dropwise a mixed solution of 5% deionized water and 10% anhydrous ethanol, and control the dropping speed within half an hour Finish adding. The reaction was continued for 4 hours, and the reaction was stopped. Then distill under normal pressure, and stop the distillation after the temperature of the remaining liquid in the bottle rises to 105°C. Prepare silicone oligomer.

[0049] b. Preparation of silicone modified polyester polyol: The raw materials of each composition are calculated as mass percentage: 13% silicone oligomer, 37% polyester polyol, and 50% mixed solvent.

[0050] Add silicone oligomer, polyester polyol and solvent...

Example Embodiment

[0055] Example 3:

[0056] a. Preparation of organosilicon oligomer: The raw materials of each composition are calculated by mass percentage: 40% silane coupling agent, 15% deionized water, and 45% anhydrous ethanol.

[0057] Add 40% silane coupling agent and 20% anhydrous ethanol to a three-necked bottle. After the temperature rises to 63℃, add dropwise a mixed solution of 15% deionized water and 25% anhydrous ethanol, and control the dropping speed within half an hour Finish adding. After continuing the reaction for 3 hours, the reaction was stopped. Then distill under normal pressure, and stop the distillation after the temperature of the remaining liquid in the bottle rises to 110°C. Prepare silicone oligomer.

[0058] b. Preparation of silicone-modified polyester polyol: The raw materials of each composition are calculated by mass percentage: 15% silicone oligomer, 35% polyester polyol, and 50% mixed solvent.

[0059] Add silicone oligomer, polyester polyol and solvent to a fo...

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Abstract

The invention discloses an organic silicon modified bi-component solvent-based polyurethane anti-corrosive coating and a preparation method thereof. The coating consists of a component A and a component B, wherein the component A is synthesized from the following raw materials in percentage by mass: 5-70 percent of organic silicon modified polyester polyol, 5-60 percent of pigment-filler, 10-50 percent of mixed solvent, 0-0.05 percent of catalyst, 1-5 percent of flatting agent, 0-0.2 percent of coupling agent, 0.3-0.5 percent of anti-settling agent, 0.1-0.5 percent of wetting dispersant, 0.2-1.4 percent anti-skinning agent and 0.2-0.5 percent of defoaming agent; and the component B is 5-50 percent of TDI-TMP addition product. The coating has the properties of high solid content, high adhesion, high temperature resistance, wear resistance, moisture and heat resistance, resistance to acid attack, hydrophobic property, normal temperature construction and the like, and is suitable for preventing corrosion of ordinary metal and concrete facilities, particularly for preventing corrosion of a desulfurated chimney inner wall of a power station, and overcomes the defects existing in the conventional anti-corrosive coating.

Description

technical field [0001] The invention relates to a polyurethane anticorrosion coating and a preparation method thereof, in particular to an organosilicon-modified two-component solvent-type polyurethane anticorrosion coating. Background technique [0002] At present, coal-fired power generation accounts for more than 70% of the total power generation. According to relevant data, coal-fired power will account for about 62.6% by 2015, and will still account for more than 50% by 2050. It can be seen that the pattern of electricity dominated by coal-fired power will continue to grow. It won't change for a long time. Driven by environmental protection policies, coal-fired power stations have installed flue gas desulfurization facilities, and 95% of these facilities have adopted wet desulfurization technology. Relevant studies have shown that no matter whether the wet desulfurization system is equipped with a gas heat exchanger (GGH) or not, the flue gas temperature of the chimney...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D7/12C09D5/08
Inventor 赵毅陈海松
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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