Water-based polyurethane anticorrosive coating for containers and preparation method for coating

An anti-corrosion coating, water-based polyurethane technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, anti-fouling/underwater coatings, etc., can solve the problems of poor water resistance, affecting the health of construction workers, and low hardness of acrylic paint films

Active Publication Date: 2014-07-02
GUANGZHOU JOINTAS CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the present invention, the polyurethane emulsion with excellent physical properties is used as the main film-forming resin, and the acrylic emulsion with excellent anti-corrosion performance is used for blending and modification, and environmentally friendly anti-corrosion pigments and fillers and functional additives are selected to carry out reasonable formula design , to prepare an environmentally friendly and efficient water-based anti-corrosion coating to replace traditional solvent-based anti-corrosion coatings, solve the environmental pollution caused by the volatilization of organic solvents and affect the health of construction workers; replace the currently commonly used acrylic exterior paint, solve The acrylic paint film has low hardness, poor water resistance in the early stage, and prone to pinholes, sags, shrinkage cavities and other disadvantages of the paint film

Method used

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  • Water-based polyurethane anticorrosive coating for containers and preparation method for coating
  • Water-based polyurethane anticorrosive coating for containers and preparation method for coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Under the rotating speed of 600r / min, add 1.5 parts of film-forming aids (DPM, Dow Chemical) in the formula successively, 1.5 parts of film-forming aids (alcohol ester-12, Eastman chemical industry), antifreeze agent (propylene glycol, Dow Chemical) 1 part, salt spray resistant hydrophobic agent (TEGO Phobe 1401, Tego Chemicals) 0.5 part, stirred for 10 minutes to prepare a premixed solution for later use.

[0048] Add 8 parts of tap water, 0.1 part of anti-corrosion and anti-mold agent (SR1138, Sol Chemical, UK), 1 part of anti-sedimentation agent (HL-200, CNPC Shuangji Chemical), wetting and dispersing agent (X-405, Rohm Ha Adams company) 0.4 parts, pH regulator (AMP-95, ANGUS, USA) 0.2 parts, defoamer (FoamStar A36, Corning) 0.2 parts, after stirring for 10 minutes, adjust the speed to 1200r / min, and then add Then add 10 parts of inorganic coloring pigments (titanium dioxide / iron oxide red / iron oxide black / iron oxide yellow, Lockwood Pigment Co., Ltd.), antirust pigm...

Embodiment 2

[0052] Under the rotating speed of 600r / min, add 1.5 parts of film-forming aids (DPM, Dow Chemical) in the formula successively, 1.5 parts of film-forming aids (alcohol ester-12, Eastman chemical industry), antifreeze agent (propylene glycol, Dow Chemical) 0.5 part, salt spray resistant hydrophobic agent (TEGO Phobe 1401, Tego Chemicals) 1 part, stirred for 10 min to prepare a premixed solution for later use.

[0053] Add 8 parts of tap water, 0.1 part of anti-corrosion and anti-fungal agent (SR1138, Thor Chemical, UK), 1 part of anti-settling agent (BentoneEW, Hemings, USA), and 0.9 part of wetting and dispersing agent (SN-5027, Shenzhen Haichuan Chemical) , 0.4 part of pH regulator (ammonia water, Dow Chemical), 0.4 part of defoamer (Foamex 815, Digao Chemical), after stirring for 10 min, the rotating speed was adjusted to 1200r / min, and then the premixed solution prepared above was added, Then add 12 parts of inorganic colored pigments (titanium dioxide / iron oxide red / iron ...

Embodiment 3

[0057] Under the speed of 600r / min, add 1 part of film-forming aid (DPM, Dow Chemical) in the formula successively, 2 parts of film-forming aid (alcohol ester-12, Eastman chemical industry), antifreeze agent (propylene glycol, Dow Chemicals) 1.5 parts, salt spray resistant hydrophobic agent (TEGO Phobe 1500N, Tego Chemicals) 0.5 parts, stirred for 10 minutes, prepared a premixed solution for later use.

[0058] Add 11 parts of tap water, 0.2 parts of antiseptic and antifungal agent (YN-187, Beijing Aohan Chemical), 0.5 part of anti-sedimentation agent (A200, Degussa), wetting and dispersing agent (Orotan 731A, Rohm and Haas, USA) ) 1 part, pH regulator (AMP-95, ANGUS, USA) 0.3 part, defoamer (Defomer 155, Haichuan Chemical) 0.3 part, after stirring for 10 minutes, adjust the rotating speed to 1200r / min, then add the previously prepared Mixed solution, then add 6 parts of inorganic colored pigments (titanium dioxide / iron oxide red / iron oxide black / iron oxide yellow, Lockwood Pi...

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Abstract

The invention discloses a water-based polyurethane anti-corrosion coating for containers and a preparation method thereof. The raw material formula is composed of the following components in terms of weight percentage: 5-14% of tap water, 20-50% of water-based polyurethane dispersion, and 10% of acrylic emulsion -20%, anti-rust pigment 5-10%, body filler 10-25%, coloring pigment 0-15%, anti-settling agent 0.3-1.0%, film-forming aid 2-6%, thickener 0.3-1.0% , defoaming agent 0.1-0.4%, salt-spray resistant hydrophobic agent 0.5-1.0%, anti-corrosion and anti-mold agent 0.1-0.3%, pH regulator 0.1-0.4%, wetting and dispersing agent 0.5-1.0%, antifreeze agent 0.5-2 %, leveling agent or substrate wetting agent 0.1-0.4%; the product of the present invention does not contain harmful substances such as organic solvents and heavy metals, and has excellent environmental protection, simple and convenient construction, safe and stable storage, and excellent performance.

Description

technical field [0001] The invention relates to the technical field of water-based paint, in particular to a water-based polyurethane anti-corrosion paint for coating the outer surface of a container and a preparation method thereof. Background technique [0002] Containers are special tools for international transportation and logistics, and most of them are steel structures. Since the transportation of containers is between the land and the sea, it is required to have strong corrosion resistance and temperature resistance (-40 ~ 70 ° C), and also requires good decoration, no discoloration, no chalking, and wear resistance , Scratch resistance, impact resistance, etc., and can withstand the test of harsh conditions. This puts forward higher requirements for the protection of metal structures in harsh corrosive environments. At present, the exterior paints for domestic containers are mainly solvent-based paints, which contain a large amount of VOC (Volatile Organic Compoμn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D125/14C09D133/00C09D5/08C09D5/14C09D7/12
Inventor 陈中华陈海洪张鸿
Owner GUANGZHOU JOINTAS CHEM
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