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Waterborne polyurethane severe corrosion-resisting primer and preparation method thereof

A water-based polyurethane and anti-corrosion primer technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve problems such as health and environmental threats, and achieve excellent waterproof and anti-fouling, low wear, and strong slip resistance. Effect

Active Publication Date: 2018-07-06
哈尔滨雨阳佳泰环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, traditional solvent-based polyurethane coatings need to add a large amount of organic solvents in the process of preparation and construction, which poses a threat to human health and the environment (such as patent CN104293190A)

Method used

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  • Waterborne polyurethane severe corrosion-resisting primer and preparation method thereof
  • Waterborne polyurethane severe corrosion-resisting primer and preparation method thereof
  • Waterborne polyurethane severe corrosion-resisting primer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0063] Embodiment A: Preparation of modified water-based one-component polyurethane emulsion

[0064] Prepare raw materials: water-based one-component polyurethane emulsion adopts MT, organosilicon intermediates adopt Dow Corning

[0065] Add water to the water-based one-component polyurethane emulsion, adjust the pH value to 8-9 with ethanolamine, add the organic silicon intermediate while stirring, and place it for 8-16 hours (room temperature) after the addition, and it can be used immediately. Infrared absorption spectrum as figure 1 Shown, where a is the spectrum of polyurethane, b is the spectrum of silicone modified polyurethane, 3440cm -1 It is the vibration absorption peak of the silicon-oxygen bond, and the peak intensity in Figure b is greater.

Embodiment B

[0066] Example B: Preparation of Surface Calcium Ionized Silica

[0067] Prepare 3-aminopropyltriethoxysilane, ethanol, deionized water, 25% ammonia water, anhydrous calcium chloride, PAA-Br, dichloromethane and other raw materials, and prepare them according to the following steps:

[0068] Disperse a certain amount of silicon dioxide in a mixed solution of ethanol: water = 5: 1 by ultrasonic waves, then add 25% ammonia water and 3-aminopropyltriethoxysilane, stir at 25°C for 24 hours, filter, wash, Vacuum drying for 10 hours to obtain A;

[0069] Disperse A in dichloromethane and NaHPO 4 -NaH 2 PO 4 (pH=6) into the mixed solution, add PAA-Br, 0°C, 10min, then warm up to 25°C, stir for 24h, centrifuge, wash, and vacuum dry for 10h to obtain A 1 ;

[0070] Will A 1 Disperse in deionized water, add 3% CaCl 2 , stirred for 24h, centrifuged, washed, and vacuum-dried for 10h to obtain the surface calcium ionized silica A 2 .

[0071] figure 2 It is a schematic flow char...

Embodiment 1

[0072] Embodiment 1: Preparation of water-based one-component polyurethane heavy anticorrosion primer

[0073] Prepare each raw material: 300g water-based one-component polyurethane emulsion (covestro company's MT), 100g wax emulsion (AD62 of GSM Company), 150g deionized water, 60g film-forming aid (dipropylene glycol butyl ether of Dow Company), 200g body filler (1250 mesh ground calcium carbonate of Linkou Omiya Company) , 100g anti-rust pigment (SZP-391 of HALOX Company), 20g thickener (RHEOLATE 150 of Hemingsi Company), 40g defoamer (SIN02 of Sol Company), 30g dispersant (OROTAN of Dow Company) TM 731A).

[0074] Then proceed as follows to prepare:

[0075] Add deionized water, dispersant, and defoamer to the agitator, and stir for 10 minutes at 600 rpm;

[0076] Under stirring conditions, add film-forming aids, fillers, anti-rust pigments, about 10g thickener, increase the speed to 1200 rpm, continue stirring for 30-50 minutes, and stop stirring when the fineness reac...

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Abstract

The invention provides a waterborne monocomponent polyurethane severe corrosion-resisting primer and a preparation method thereof. The primer is prepared from waterborne monocomponent polyurethane emulsion, a rust resisting pigment, a coalescing agent, a defoaming agent, a thickening agent, optional wax emulsion, physical filler, a dispersing agent and deionized water. The waterborne corrosion-resisting primer provided by the invention has the advantages of high antirust ability, excellent corrosion resistance, as well as high adhesion and good water resistance of the whole paint film; in addition, the whole paint film has excellent waterproof and antifouling properties and a metal base material is strengthened.

Description

technical field [0001] The invention relates to the field of heavy anticorrosion of metal substrates for construction, and relates to a water-based one-component polyurethane heavy anticorrosion primer and a preparation method thereof. Background technique [0002] When the metal is in contact with the surrounding medium, the damage caused by chemical and electrochemical actions is called metal corrosion. From a thermodynamic point of view, except for a few noble metals (such as Au, Pt), all kinds of metals have a tendency to transform into ions, that is to say, metal corrosion is a spontaneous and ubiquitous phenomenon. After the metal is corroded, it will change in appearance, color and mechanical properties, causing equipment damage, pipeline leakage, product pollution, causing vicious accidents such as combustion or explosion, and serious waste of resources and energy, which will cause huge damage to the national economy. loss. [0003] It is estimated that the annual ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/61C09D7/63C09D7/65
CPCC08K2003/265C09D5/084C09D175/04C08L91/06C08K9/06C08K9/02C08K3/36C08K3/26C08K5/06
Inventor 郑荣荣张文惠于海泉杨洋王维全吕魁奇
Owner 哈尔滨雨阳佳泰环保新材料有限公司
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