Polyurethane anti-corrosion priming paint sprayed on steel structure in abyssal environment

A technology of spraying polyurethane and anti-corrosion primer, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., which can solve the problems of increasing safety protection costs, waste treatment costs, prone to pinholes on the surface of the paint film, and reducing the anti-corrosion performance of the paint film, etc. problems, to achieve the effect of improving penetration resistance and corrosion resistance, solving low bond strength, and eliminating pinholes in the coating

Inactive Publication Date: 2012-09-19
QINGDAO ADVANCED MARINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1) In terms of performance, solvent-based anti-corrosion primers are prone to pinholes on the surface of the paint film as the solvent volatilizes, resulting in defects in the paint film and reducing the anti-corrosion performance of the paint film
[0011] 2) In terms of coating, solvent-based anti-corrosion primers require multiple layers of construction due to the low thickness of a single layer of coating film during construction, resulting in low efficiency and long construction period
Solvent-based anti-corrosion coatings need to form a film after the solvent volatilizes, so there is a dew point limit when coating
[0012] 3) In terms of safety, solvent-based anti-corrosion coatings have emissions of organic volatiles during production and construction, which increases fire hazards, increases safety protection costs, waste disposal costs, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The deep-sea environment steel structure in this implementation case is sprayed with polyurethane anti-corrosion primer, which can be applied in sea areas with a depth of 500-1000 meters. Prepare the primer of this embodiment case, comprise the following steps:

[0029] Prepare A component

[0030] Polyurethane modified epoxy resin synthesized by epoxy resin 28%, PPG polyether 10%, toluene diisocyanate 2%, zinc phosphate 10%, mica powder 2%, iron oxide red 26%, talcum powder 8%, barium sulfate 8%, 2% organic corrosion inhibitor, 1% fumed silica, 1.5% wetting and dispersing agent, 0.5% defoamer, 1% adhesion promoter, put into the mixing tank, after being dispersed evenly by special equipment, it is A components.

[0031] Prepare B component

[0032] 50% of polyamide curing agent, 48% of aromatic amine, and 2% of catalyst are mixed, stirred evenly, and discharged to form component B.

[0033] to solidify

[0034] Mix A and B components according to the weight ratio o...

Embodiment 2

[0036] The deep-sea environment steel structure in this implementation case is sprayed with polyurethane anti-corrosion primer, which can be applied in sea areas with a depth of 1000-1500 meters. Prepare the primer of this embodiment case, comprise the following steps:

[0037] Prepare A component

[0038] Polyurethane modified epoxy resin synthesized by epoxy resin 28%, PPG polyether 12%, diphenylmethane diisocyanate 2.5%, modified zinc phosphate 8%, micaceous iron oxide red 32.5%, barium sulfate 10%, organic 2% of corrosion inhibitor, 1% of fumed silica, 2% of wetting and dispersing agent, 0.8% of defoamer, and 1.2% of adhesion promoter are put into the mixing tank, and after being uniformly dispersed by special equipment, it becomes component A.

[0039] Prepare B component

[0040]43% of polyamide curing agent, 45% of cardanolamine, 10% of etheramine, and 2% of catalyst are mixed, stirred evenly, and discharged to form component B.

[0041] to solidify

[0042] Mix A a...

Embodiment 3

[0044] The deep-sea environment steel structure in this implementation case is sprayed with polyurethane anti-corrosion primer, which can be applied in sea areas with a depth of 1500-2000 meters. Prepare the primer of this embodiment case, comprise the following steps:

[0045] Prepare A component

[0046] Polyurethane modified epoxy resin synthesized by epoxy resin 30%, PTMG polyether 12%, isophorone diisocyanate 2.5%, metal powder 40%, modified zinc phosphate 6%, fiber material 2%, organic corrosion inhibitor 2% additive, 1% fumed silica, 2% wetting and dispersing agent, 1% defoamer, 2% adhesion promoter, and 1% leveling agent are put into the mixing tank, and after being uniformly dispersed by special equipment, it becomes A components.

[0047] Prepare B component

[0048] Mix 50% of cardanol amine curing agent, 36% of modified fatty amine, 12% of ether amine, and 2% of catalyst. Stir evenly and discharge to form component B.

[0049] to solidify

[0050] Mix A and B ...

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Abstract

The invention relates to a polyurethane anti-corrosion priming paint sprayed on a steel structure in an abyssal environment. The priming paint is polyurethane modified epoxy solvent-free priming paint; after being subjected to polyurethane modification, the epoxy solvent-free priming paint has higher compressive strength than a common solvent-free epoxy coating, and has higher adhesion strength with the steel structure and sprayed polyurethane. After the matching of the polyurethane modified epoxy solvent-free priming paint and the spray polyurethane, the drawing strength between the whole coating and the steel structure is tested to be larger than or equal to 10 MPa. The polyurethane modified epoxy solvent-free priming paint solves the problems of low compressive strength and polyurea adhesion strength of the common solvent-free epoxy priming paint used in the abyssal environment, and also solves the problem of low steel structure adhesion strength of a polyurethane type priming paint in the abyssal environment.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion treatment, and in particular relates to a polyurethane anticorrosion primer sprayed on a steel structure in a deep sea environment. Background technique [0002] Affected by the marine environment and the defects of the material itself, most materials, especially metals, will corrode. Corrosion of materials not only causes huge economic losses, but also pollutes the marine environment. There are many kinds of anti-corrosion technologies, and multiple technologies are often used in combination in the protection of steel structures. Among them, coating anticorrosion is the simplest and most widely used technology. Driven by regulations, energy, and anti-corrosion requirements, anti-corrosion coatings have experienced the development of single-function, high VOC content, and complex construction to high-performance, multi-functional, intelligent, environmentally friendly, and integrated coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/12C08G18/42C08G18/58C08G59/14
Inventor 吴燕芳刘连河胡松霞张安智
Owner QINGDAO ADVANCED MARINE MATERIAL TECH
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