Environment-friendly water-based nano coating material used for concrete protection, and preparation method thereof

A concrete, environmentally friendly technology, used in antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve the problems of long reaction time, decline in the performance of emulsions, lower production efficiency, etc., to improve concrete protection Effect, durability improvement, good protection effect

Active Publication Date: 2013-09-04

江苏道成不锈钢管业有限公司

12 Cites 35 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Patent 102186893 discloses a concrete treatment agent containing fluorine and silicon, which improves the hydrophilicity of concrete due to the porous structure, and improves the oil repellency and stain resistance, but the preparation process of the fluorine-containing polymer is complicated and the cost is high. Not conducive to application

Patent CN 200510034381.6 introduces a silicone waterproofing agent and its preparation method. The polymerization reaction time is 15-22 hours, the reaction time is too long, and sulfuric acid is used...

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Abstract

The invention provides an environment-friendly water-based nano coating material used for concrete protection, and a preparation method thereof. The environment-friendly water-based nano coating material comprises 15%-65% of an organic silane coupling agent, 0.5-10% of nano silica, 0.5-5% of nano titanium dioxide, 0.4%-4% of an organosilicon oligomer, 0.3%-3% of an emulsifier, 0.1%-0.6% of a bactericidal anti-algae agent, 0.01%-0.1% of a regulator, and the balance being deionized water. The environment-friendly water-based nano coating material used for the concrete protection takes advantages of a nanometer effect of nanoparticles and a hydrophobic effect of long-chain organosilicone coupling agent. The prepared environment-friendly water-based nano coating material used for the concrete protection has excellent protection performance.

Application Domain

Antifouling/underwater paintsPaints with biocides

Technology Topic

Silane couplingOrganosilicon +8

Examples

Experimental program(10)
Comparison scheme(4)

Example Embodiment

[0046] Example 1:

[0047] Taking the production of 100g of the material of the present invention as an example, the raw materials used and the preparation process thereof:

[0048] (1) Disperse 0.5g nano-silica and 0.5g nano-titanium dioxide into 10g silane coupling agent at 30℃, stir for 30min, filter and dry, and set aside; at room temperature (25℃), the silane coupling The nano-silica and nano-titanium dioxide treated with the coupling agent are ultrasonically dispersed into 10g of water, and ultrasonically for 10 minutes at a power of 100w to obtain a uniformly dispersed solution A;

[0049] (2) Disperse 1g OP-10 emulsifier, 1.6g Span-60 emulsifier, 0.4g sodium lauryl sulfate in 16.4g water at 25℃, stir for 15min at 250rpm stirring speed, and stir evenly to obtain solution B ; Disperse 4g organosilicon oligomer, 0.6g 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT) into 65g n-hexadecyltriethoxysilane , Stir for 15min at 250rpm stirring speed to obtain evenly dispersed solution C;

[0050] (3) Add solution A and solution C slowly to solution B at a rate of 2 drops/sec while stirring. The stirring speed is between 1000 rpm and 3000 rpm, and the stirring speed varies with the amount of solution A. Increase and gradually increase; after the dripping, add the pH regulator triethylamine dropwise until the pH of the solution is 8, and then stir and disperse for 30 minutes to prepare an environmentally friendly water-based nano coating for concrete protection material.

[0051] The prepared environment-friendly water-based nano-coating material for concrete protection has a uniform appearance, no impurities, no delamination, no bleaching oil, no precipitation, and the water absorption rate after painting on the concrete surface is 0.0038mm/min 0.5 , The blank test water absorption rate is 0.047 mm/min 0.5 , The reduction rate of chloride absorption is 91%, the carbonization depth of concrete is reduced by 90%, and the impermeability of concrete is increased by 70%.

Example Embodiment

[0052] Example 2:

[0053] Taking the production of 100g of the material of the present invention as an example, the raw materials used and the preparation process thereof:

[0054] (1) Disperse 5g nano-silica and 2g nano-titanium dioxide into 20g silane coupling agent at 50℃, stir for 45min, filter and dry, and set aside; at room temperature (25℃), remove silane coupling agent The treated nano-silica and nano-titanium dioxide are ultrasonically dispersed into 20g of water, and ultrasonicated for 15min under 500w power to obtain uniformly dispersed solution A;

[0055] (2) Disperse 1g of NP-20 emulsifier, 1.5g of Span-80 emulsifier, and 0.5g of sodium lauryl sulfate into 17g of water at 25°C, stir for 15min at a stirring speed of 250rpm, and stir evenly to obtain solution B; Disperse 0.4g of silicone oligomer and 0.6g of 2-n-octyl-4-isothiazolin-3-one (OIT) into 52g of n-hexadecyltriethoxysilane and stir for 40min at a stirring speed of 50rpm. Obtain a uniformly dispersed solution C;

[0056] (3) Add solution A and solution C to solution B slowly at a dropping rate of 10 drops/sec while stirring. The stirring speed is between 1000 rpm and 3000 rpm, and the stirring speed varies with the amount of solution A. Increase and gradually increase; after the dripping, add the pH adjuster triethylamine dropwise until the pH of the solution is 9, and then stir and disperse for 30 minutes to prepare an environmentally friendly water-based nano coating for concrete protection material.

[0057] The prepared environmentally friendly water-based nano-coating material for concrete protection has a uniform appearance, no impurities, no delamination, no bleaching oil, no precipitation, and the water absorption rate after painting on the concrete surface is 0.0042mm/min 0.5 , The blank test water absorption rate is 0.047 mm/min 0.5 , The reduction rate of chloride absorption is 91%, the depth of concrete carbonization is reduced by 85%, and the impermeability of concrete is improved by 68%.

Example Embodiment

[0058] Example 3:

[0059] Taking the production of 100g of the material of the present invention as an example, the raw materials used and the preparation process thereof:

[0060] (1) Disperse 10g nano-silica and 0.5g nano-titanium dioxide into 20g silane coupling agent at 50℃, stir for 45min, filter and dry, set aside; couple silane at room temperature (25℃) The nano-silica and nano-titanium dioxide treated with the agent were ultrasonically dispersed into 35g of water, and ultrasonicated for 25min under 1000w power to obtain uniformly dispersed solution A;

[0061] (2) Disperse 0.25g Tween-80 emulsifier and 0.05g sodium lauryl sulfate into 15.1g water at 25°C, stir for 40min at a stirring speed of 50rpm, and stir evenly to obtain solution B; reduce 4g of silicone Polymer, 0.1g 2-n-octyl-4-isothiazolin-3-one (OIT) was dispersed in 35g n-hexadecyltriethoxysilane, stirred at 100rpm stirring speed for 30min to obtain uniformly dispersed solution C ;

[0062] (3) Add solution A and solution C slowly to solution B at a dropping rate of 5 drops/sec while stirring. The stirring speed is between 1000 rpm and 3000 rpm, and the stirring speed varies with the amount of solution A. After the addition, the pH regulator ethanolamine is added dropwise until the pH of the solution is 8, and then stirred and dispersed for 30 minutes to prepare an environmentally-friendly water-based nano-coating material for concrete protection.

[0063] The prepared environmentally friendly water-based nano-coating material for concrete protection has a uniform appearance, no impurities, no delamination, no bleaching oil, no precipitation, and the water absorption rate after painting on the concrete surface is 0.0042mm/min 0.5 , The blank test water absorption rate is 0.049 mm/min 0.5 , The chloride absorption rate is reduced by 91%, the carbonization depth of concrete is reduced by 88%, and the impermeability of concrete is increased by 72%.

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PUM

Property	Measurement	Unit
Water absorption	0.0038
Water absorption	0.047
Water absorption	0.0042
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Good environmental stability
Stable performance

Preparation method and application of dual-purpose probe integrating solid-phase micro-extraction fibers and electrochemical detection working electrodes

ActiveCN105699452AExcellent electrochemical performanceGood environmental stabilityPreparing sample for investigationMaterial electrochemical variablesSolventCvd graphene

Owner:BEIJING UNIV OF TECH

Efficient perovskite quantum dot anion exchange method

InactiveCN109920864AGood environmental stabilityGood monodispersityFinal product manufactureSemiconductor devicesIonIon exchange

Owner:NANJING UNIV OF POSTS & TELECOMM

Environment-friendly water-based nano coating material used for concrete protection, and preparation method thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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