A flexible polyurea heavy-duty anti-corrosion coating

A heavy-duty anti-corrosion, polyurea technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, epoxy resin coatings, etc., can solve the problems of high requirements for spraying equipment, complex spraying process, complicated preparation process, etc., to achieve high construction efficiency, Simple preparation process and high solid content

Active Publication Date: 2019-11-05
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-corrosion performance of the modified coating is improved, but the preparation process is more complicated, and the requirements for spraying equipment are high
The double-layer coating structure makes the spraying process complicated and the construction efficiency low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A flexible polyurea heavy-duty anti-corrosion coating, composed of A and B components.

[0040] Component A: Add 50kg of polyaspartic acid ester F520, 50kg of F524 and 9kg of hydrogenated epoxy resin EPALLOY5000 (epoxy value 0.47eq / 100g) into the mixing tank, add 2.3kg of thixotropic agent R972, and use 800r / Disperse at high speed for 20 minutes until uniform. At a speed of 500r / min, add 10kg of butyl acetate, 1.5kg of dispersant 628, 68000.3kg of defoamer, 3kg of leveling agent BYK-354, 1.2kg of coupling agent KH560, and add 25kg of titanium dioxide and phthalate after dispersing for 10 minutes. Cyanine 0.6kg, aluminum tripolyphosphate 35kg, dispersed for 30 minutes, and ground to a fineness of 30 μm or less. Add 35kg of 250-mesh GF-007c glass flakes, 25kg of 600-mesh Novamet stainless steel flakes and 1.7kg of light stabilizer 5151, and disperse at 600r / min for 20min to obtain component A evenly.

[0041] Component B: Add 8 kg of butyl acetate, 72 kg of HDI trimer ...

Embodiment 2

[0044] A flexible polyurea heavy-duty anti-corrosion coating, composed of A and B components.

[0045] Component A raw materials include Desmophen NH1520 53kg, Feiyang F524 47kg, hydrogenated epoxy resin AL-3040 (epoxy value 0.42eq / 100g) 11kg, rutile titanium dioxide 19kg, carbon black N660 1kg, precipitated barium sulfate 30kg, wetting and dispersing agent Disponer 9250 1.8kg, defoamer EFKA 2722 0.5kg, leveling agent Tego Flow300 3.9kg, light stabilizer TINUVIN 5060 2.4kg, coupling agent KH560 1.2kg, meteorological silica AEROSIL R972 2.3kg, 450 mesh GF-325 Glass flakes and 450-mesh Novamet stainless steel flakes are 32kg each, butyl acetate is 6kg, and xylene is 4kg. The preparation method is the same as in Example 1 to obtain component A.

[0046] Component B raw materials include HDI trimer 190B / S 69.2kg, elastomer curing agent E402-90T 18.7kg, butyl acetate 9kg, xylene 6kg. The preparation method is the same as in Example 1 to obtain component B.

[0047] Take the -NCO...

Embodiment 3

[0049] A flexible polyurea heavy-duty anti-corrosion coating, composed of A and B components.

[0050] The raw materials of component A include Feiyang F520 57kg, F524 43kg, hydrogenated epoxy resin ST-3000 (epoxy value 0.44eq / 100g) 18kg, rutile titanium dioxide 26.5kg, sunfast yellow 0.5kg, mica 14kg, talcum powder 14kg, emulsifier Wet dispersant Tego Dispers 628 2.5kg, defoamer EFKA 2722 0.6kg, leveling agent Tego Flow300 3.8kg, light stabilizer TINUVIN 5151 2.5 kg, coupling agent KH560 1.9kg, bentonite BENGEL828 3.1kg, 300 mesh Huaxing glass flakes 30kg, 500 mesh Novamet stainless steel flakes 26kg, butyl acetate 9kg, xylene 6kg. The preparation method is the same as in Example 1 to obtain component A.

[0051] Component B raw materials include 71.2kg of HDI trimer 190B / S, 17.8kg of elastomer curing agent SP-103P, and 18kg of butyl acetate. The preparation method is the same as in Example 1 to obtain component B.

[0052] Take the -NCO index as 1.07, mix the prepared coa...

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Abstract

The invention discloses a flexible heavy-duty anticorrosive polyurea coating, belonging to the technical field of surface protection. According to the invention, hydrogenated epoxy resin modified polyaspartic acid ester resin and an aliphatic HDI trimer curing agent are used as main film-forming substances; a flaky preservative composite system is employed; so a film formed by the coating has improved compactness and enhanced resistance to mediums and corrosion. The flexible heavy-duty anticorrosive polyurea coating provided by the invention is a two-component system and has a NCO index of 1.05 to 1.1. The coating at least comprises, by mass, 100 parts of polyaspartic acid ester resin, 6 to 18 parts of hydrogenated epoxy resin, 56 to 85 parts of a flaky preservative additive, 20 to 35 parts of pigment, 20 to 35 parts of a filling material and 10 to 20 parts of an auxiliary agent. The coating integrates primer and finishing coat into one, and has fast curing speed, high tensile strength, certain hardness and flexibility and good adhesion on a substrate; and the coating has the advantages of weatherability, water resistance, corrosion resistance, wear resistance, impact resistance and the like, so the coating is applicable to long-acting anticorrosion protection of hydraulic steel structures like steel gates and trash screens and outdoor steel structures like steel bridges, iron towers and wind-power towers.

Description

technical field [0001] The invention belongs to the technical field of surface protection, relates to the technical field of heavy anticorrosion, in particular to the formula design of heavy anticorrosion paint. Background technique [0002] Hydraulic steel structures such as gates and trash racks are located in harsh environments, and are subject to long-term effects of climate change, sunlight, alternating wet and dry conditions, water flow, and foreign object impact, and are prone to corrosion, which significantly reduces their bearing capacity and seriously affects water conservancy. The safety of the project consumes a lot of manpower, material resources and financial resources in maintenance and protection. Therefore, it is of great practical significance to effectively control the corrosion of hydraulic steel structures and prolong their service life. [0003] Spray polyurea technology is a new solvent-free, highly reactive green spray technology. The outstanding fe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02C09D163/00C09D5/08
CPCC08L2205/035C09D5/08C09D175/02C08L63/00C08K13/04C08K7/00C08K3/40C08K2003/0856
Inventor 段衍鹏赵云鹏刘景陈宝林赵桥桥李桂群李吉宏孙玥马晓斌于名讯
Owner SHANDONG NON METALLIC MATERIAL RES INST
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