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Permeable protective agent for coating protection of oceanographic engineering concrete structure and preparation method

A technology of penetrating protective agent and concrete structure, which is applied in the field of penetrating protective agent and preparation for marine engineering concrete structure coating protection, which can solve the problem of water absorption reduction and the ability of chloride ion penetration is not clear, described in detail, not mentioned Penetration protectant durability and other issues to achieve the effect of enhancing resistance and ensuring permeability

Active Publication Date: 2019-06-14
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-corrosion coating obtained is not much different from other silicone resins in active ingredients, and it can be judged that the degree of reduction in water absorption is limited
And there is no mention of the durability of the penetrant
[0006] Chinese patent document CN108410218A discloses a coupling agent-modified organic-inorganic composite concrete protective coating and its preparation method and application. It combines the advantages of organic and inorganic materials and improves the surface protection effect and durability. The investigation of permeability performance is not mentioned, and it is difficult to determine the degree of ion damage to concrete structures applied in marine environments
[0007] Chinese patent document CN206467152U discloses a composite protective coating for concrete substrates under marine chlorine salt erosion environment, specifically discloses the structure of the composite protective coating, which is sequentially from the inside to the outside of latex powder modified epoxy resin layer, water-based Epoxy resin layer, modified titanium dioxide layer and topcoat layer improve the toughness, adhesion and chloride ion penetration resistance of the coating, but there is no clear and detailed description on the ability of chloride ion penetration
Although silicone polymer coatings are used as topcoats, the weatherability of epoxy resin primers and midcoats in marine environments cannot be guaranteed

Method used

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  • Permeable protective agent for coating protection of oceanographic engineering concrete structure and preparation method
  • Permeable protective agent for coating protection of oceanographic engineering concrete structure and preparation method
  • Permeable protective agent for coating protection of oceanographic engineering concrete structure and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 15 parts of isopropanol and 19.8 parts of water and mix well;

[0037] Prepare 5 parts of mixed emulsifier according to the composition in the column of Example 1 of Table 2, and dissolve in the prepared alcoholic aqueous solution to obtain an emulsion;

[0038] Weigh 5 parts of (3,3,3-trifluoropropyl)methyldimethoxysilane, 5 parts of (3,3,3-trifluoropropyl)methyltrimethoxysilane, (3,3, 5 parts of 3-trifluoropropyl) methyltriethoxysilane, 15 parts in total,

[0039] 15 parts of methyl triethoxysilane, 15 parts of ethyl triethoxysilane, 15 parts of propyl triethoxysilane, 45 parts in total,

[0040] 0.2 parts of formic acid (concentration 0.01mol / L);

[0041] Slowly add the weighed fluorosiloxane monomer and siloxane monomer into the prepared emulsion at a speed of 15 drops / min, and at the same time stir and mix at a speed of 1000r / min. During the stirring process, drop Add formic acid, emulsify at 800r / min, 35°C, and react for 2 hours to obtain a uniform micro-n...

Embodiment 2

[0043] Take 17 parts of isopropanol and 18.7 parts of water and mix well;

[0044] Prepare 4 parts of mixed emulsifiers according to the composition in Table 2, Example 2, and dissolve in the prepared alcoholic aqueous solution to obtain an emulsion;

[0045] Weigh 5 parts of (3,3,3-trifluoropropyl)methyldimethoxysilane, 5 parts of (3,3,3-trifluoropropyl)methyldiethoxysilane, (3,3 , 5 parts of 3-trifluoropropyl)methyltrimethoxysilane, 5 parts of (3,3,3-trifluoropropyl)methyltriethoxysilane, 20 parts in total,

[0046] 15 parts of ethyl triethoxysilane, 15 parts of propyl triethoxysilane, 10 parts of isobutyl ethyl triethoxysilane, 40 parts in total,

[0047] 0.3 parts of acetic acid (concentration 0.01mol / L);

[0048]Slowly add the weighed fluorosiloxane monomer and siloxane monomer into the prepared emulsion at a speed of 15 drops / min, and at the same time stir and mix at a speed of 1300r / min. During the stirring process, drop Add acetic acid, emulsify at 900r / min, 45°C, a...

Embodiment 3

[0050] Take 19 parts of ethanol and 17.6 parts of water and mix well;

[0051] Prepare 3 parts of mixed emulsifiers according to the composition in the column 3 of Example 3 of Table 2, and dissolve in the prepared alcoholic aqueous solution to obtain an emulsion;

[0052] Weigh 5 parts of (3,3,3-trifluoropropyl)methyldimethoxysilane, 5 parts of (3,3,3-trifluoropropyl)methyldiethoxysilane, (3,3 , 10 parts of 3-trifluoropropyl)methyltrimethoxysilane, 5 parts of (3,3,3-trifluoropropyl)methyltriethoxysilane, 25 parts in total,

[0053] 15 parts of methyl triethoxysilane, 15 parts of ethyl triethoxysilane, 5 parts of propyl triethoxysilane, 35 parts in total,

[0054] 0.4 parts of hydrochloric acid (concentration 0.01mol / L);

[0055] Slowly add the weighed fluorosiloxane monomer and siloxane monomer into the prepared emulsion at a speed of 15 drops / min, and at the same time stir and mix at a speed of 1200r / min. During the stirring process, drop Add hydrochloric acid, emulsify a...

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Abstract

The invention discloses a permeable protective agent for coating protection of an ocean engineering concrete structure. The protective agent comprises the following components in percentage by weight:15-35% of fluorosiloxane monomer; 25%-45% of siloxane monomer; 0.2%-0.7% of acidic catalyst; 15%-25% of alcohol; 1%-5% of emulsifier; and 10%-20% of water. The permeable protective agent for coatingprotection of the oceanographic engineering concrete structure has excellent permeability and durability, can prolong the service life of the concrete structure, and is particularly suitable for coating protection of the oceanographic engineering concrete structure. The invention also discloses a preparation method of the permeable protective agent for coating protection of the ocean engineering concrete structure.

Description

technical field [0001] The invention relates to the technical field of marine engineering materials, in particular to a penetrating protective agent for coating and protection of marine engineering concrete structures and a preparation method thereof. Background technique [0002] Marine reinforced concrete projects have long been affected by factors such as chloride salts, carbonation, sulfate, freeze-thaw, and alkali aggregates alone or in combination. Not only does it cause damage to the concrete body, but it also induces corrosion of the steel bars in the concrete, resulting in cracking and spalling of the concrete cover, a reduction in the cross-sectional area of ​​the steel bars, and a reduction in the bearing capacity, which eventually leads to the destruction of the reinforced concrete structure. The marine corrosion environment is complex and divided into atmospheric area, splash area, tidal range area, full immersion area and sea mud area. For the splash area and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/24C08G77/08C09D183/08C09D5/08
Inventor 朱骏骜张剑赵希娟王炜韩宇栋侯兆新宋涛文邓宽王满凯于大第郑旗张腾闫贵海陈夙
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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