CN112251058A - Urban green road inorganic silicate coating and preparation method thereof - Google Patents

Abstract

The invention provides an urban green road inorganic silicate coating which is prepared by mixing and modulating the following components in parts by weight: 27.9-30.4 parts of water, 0.3-0.5 part of ethyl hydroxyethyl cellulose, 0.6-0.8 part of dispersing agent, 0.2-0.4 part of wetting agent, 0.4-0.6 part of defoaming agent, 0.4-0.6 part of dispersion stabilizer, 6-10 parts of rutile titanium dioxide, 16-20 parts of modified composite silicate toughening powder capable of carrying out bonding reaction with hydroxyl functional groups of nano inorganic silicon modified silicate solution and 4-8 parts of barium sulfate; 2-4 parts of acrylic emulsion, 0.1-0.2 part of film-forming assistant, 30-32 parts of nano inorganic silicon modified silicate solution, 0.2-0.4 part of thickening and leveling agent and 1-3 parts of inorganic pigment color paste. The invention solves the problems of poor wear resistance, easy fading, poor water and air permeability and long construction period of the traditional organic coating in the field of urban green road coating.

Description

Urban green road inorganic silicate coating and preparation method thereof

Technical Field

The invention relates to the technical field of building decoration functional coatings, in particular to an urban green road inorganic silicate coating and a preparation method thereof.

Background

The concept of the sponge city is put forward in a 2012 low-carbon city and a 2012 regional development science and technology forum for the first time, namely measures such as seepage, stagnation, storage, purification, use and drainage are taken, limited rainwater is preferentially reserved when an urban drainage system is promoted, more natural force is preferentially used for drainage, and the sponge city with natural deposit, natural seepage and natural purification is built. The urban green road is a green open space which can be used for pedestrians and riders to enter, has good natural landscape and mainly has a leisure function, and can fully embody the personal information of the city. How to bring city green road construction into sponge city management is always an important work.

At present, the traditional process is to lay large-particle sand concrete on a road surface, and then coat a color organic coating (such as an acrylic acid system, a polyurethane system and the like) on the surface of the concrete, but due to the performance limitation of an organic coating, the use effect is often unsatisfactory, the problems of poor wear resistance, quick color fading, poor decoration and use effect caused by paint film damage and the like occur, more serious, the problem that a compact coating film is formed on the surface layer of the large-particle sand concrete after the organic coating is dried, a concrete water seepage channel is blocked, the national requirement of 'sponge city' effect cannot be met, and the problem that a paint film is raised and falls off due to the obstruction of an underground water vapor rising channel is easily caused. And the organic coating needs to be applied to a dry base layer after complete curing, so that the construction period is long.

Disclosure of Invention

The invention aims to solve the technical problem of providing an urban green road inorganic silicate coating and a preparation method thereof, and simultaneously, inorganic toughening powder is utilized in the formula to balance the hardness and toughness of the inorganic coating, so that the problems of poor wear resistance, easy fading, poor water and air permeability and long construction period of the traditional organic coating in the field of urban green road coating are solved, and the application of the inorganic coating in the field of sponge cities is promoted.

In order to solve the technical problems, the invention provides an urban green road inorganic silicate coating which is prepared by mixing and modulating the following components in parts by weight:

27.9-30.4 parts of water, 0.3-0.5 part of ethyl hydroxyethyl cellulose, 0.6-0.8 part of dispersing agent, 0.2-0.4 part of wetting agent, 0.4-0.6 part of defoaming agent, 0.4-0.6 part of dispersion stabilizer, 6-10 parts of rutile titanium dioxide, 16-20 parts of modified composite silicate toughening powder capable of carrying out bonding reaction with hydroxyl functional groups of nano inorganic silicon modified silicate solution and 4-8 parts of barium sulfate;

2-4 parts of acrylic emulsion, 0.1-0.2 part of film-forming assistant, 30-32 parts of nano inorganic silicon modified silicate solution, 0.2-0.4 part of thickening and leveling agent and 1-3 parts of inorganic pigment color paste.

As a preferred mode, 29.15 parts of water, 0.4 part of ethyl hydroxyethyl cellulose, 0.7 part of a dispersing agent, 0.3 part of a wetting agent, 0.5 part of a defoaming agent, 0.5 part of a dispersion stabilizer, 8 parts of rutile titanium dioxide, 18 parts of modified composite silicate toughening powder and 6 parts of barium sulfate;

3 parts of acrylic emulsion, 0.15 part of film-forming additive, 31 parts of nano inorganic silicon modified silicate solution, 0.3 part of thickening and leveling agent and 2 parts of inorganic pigment color paste.

As a preferable mode, the appearance of the nano inorganic silicon modified silicate solution is colorless transparent viscous liquid, the solid content is 30 percent, the pH value is 8.0-11.0, the viscosity is less than 10cps, and the content of organic matters is less than 0.1 percent; the appearance of the modified composite silicate toughening powder is light grey white fine powder, the pH value of a water suspension is 7.0-8.5, and the relative density is 2.6-2.7; the inorganic pigment color paste is special color paste for the Kelaien inorganic paint.

The invention provides a preparation method of an urban green road inorganic silicate coating, which comprises the following steps:

step one, adding 27.9-30.4 parts of water into a container, then adding 0.3-0.5 part of ethyl hydroxyethyl cellulose under stirring, stirring and dispersing, then sequentially adding 0.6-0.8 part of dispersing agent, 0.2-0.4 part of wetting agent, 0.4-0.6 part of defoaming agent, 0.4-0.6 part of dispersion stabilizer, 6-10 parts of rutile titanium dioxide, 16-20 parts of modified composite silicate toughening powder and 4-8 parts of barium sulfate under stirring, and dispersing at high speed after adding;

and step two, after the dispersion is finished, reducing the rotating speed, sequentially adding 2-4 parts of acrylic emulsion, 0.1-0.2 part of film-forming additive, 30-32 parts of nano inorganic silicon modified silicate solution and 0.2-0.4 part of thickening and leveling agent, stirring and mixing uniformly after the addition is finished, then adding 1-3 parts of inorganic pigment color paste under the stirring state, stirring uniformly, and preparing the inorganic silicate paint with the required color.

The invention relates to an urban green road inorganic silicate coating and a preparation method thereof, compared with the existing design, the urban green road inorganic silicate coating has the advantages that: according to the invention, nano inorganic silicon is utilized to modify the traditional silicate, so that the modified silicate solution structurally has more hydroxyl functional groups for crosslinking reaction, the strength and the wear resistance of a crosslinked paint film are greatly improved, and the hardness and the toughness of the inorganic coating are balanced by adding the modified composite silicate toughening powder capable of carrying out bonding reaction with the hydroxyl functional groups of the nano inorganic silicon modified silicate; when in color matching, inorganic pigment color paste is adopted to replace organic pigment color paste; solves the problems of poor use strength, poor wear resistance, easy fading, poor water permeability and air permeability and long construction period of the traditional organic coating in the field of urban green road coating, and promotes the application of the inorganic coating in the field of sponge cities.

The inorganic silicate coating of the invention takes alkali metal silicate modified by nano inorganic silicon as a binder, and can fully generate silicification reaction with polyvalent metal ions such as carbonate, aluminate, sulfate and the like in concrete and sand after being used, thereby generating a very firm bonding body. The formed inorganic silicate coating has the hardness of 5H, extremely high wear resistance and excellent weather resistance. The silicate coating can permeate into large-particle sand concrete to carry out petrochemical reaction, forms a natural porous structure and cannot block a concrete water seepage channel, so that the silicate coating has good water permeability, rainwater can easily permeate into soil at the lower layer of a green channel, underground water vapor can easily permeate through a silicate coating film at high temperature in sunny days without the defect that the organic coating is easy to bulge and fall off, and the breathable coating structure can really realize the sponge effect required by urban roads. And the inorganic silicate coating can be constructed on the wet concrete base layer which is not completely cured, so that the construction period can be greatly shortened.

Detailed Description

The technical solution of the present invention will be further described below by way of examples, and each example is only a preferred embodiment to describe the technical solution of the present invention, and is not to be construed as limiting the present invention.

The components of the invention are all the products which are commercially available. In the present invention, "parts" mean parts by weight.

The invention provides an urban green road inorganic silicate coating which is prepared by mixing and modulating the following components in parts by weight:

27.9-30.4 parts of water, 0.3-0.5 part of ethyl hydroxyethyl cellulose, 0.6-0.8 part of dispersing agent, 0.2-0.4 part of wetting agent, 0.4-0.6 part of defoaming agent, 0.4-0.6 part of dispersion stabilizer, 6-10 parts of rutile titanium dioxide, 16-20 parts of modified composite silicate toughening powder and 4-8 parts of barium sulfate;

2-4 parts of acrylic emulsion, 0.1-0.2 part of film-forming assistant, 30-32 parts of nano inorganic silicon modified silicate solution, 0.2-0.4 part of thickening and leveling agent and 1-3 parts of inorganic pigment color paste.

The nano inorganic silicon modified silicate solution is colorless transparent viscous liquid in appearance, has the solid content of 30 percent, the pH value (25 ℃) of 8.0-11.0 and the viscosity (25 ℃)<10cps, organic content<0.1 percent; the appearance of the modified composite silicate toughening powder is light grey white fine powder, the pH value of a 10 mass percent aqueous suspension is 7.0-8.5, and the relative density is 2.6-2.7; the ethyl hydroxyethyl cellulose is white powder in appearance, and the particle size of the ethyl hydroxyethyl cellulose is 98 percent<500 μm, water content<4% of salt content<5%, a pH value (1% aqueous solution) of 5 to 7, and a viscosity (1% aqueous solution) at 20 ℃ of 3000 to 4000 mPa.s; the dispersing agent is low-molecular-weight polyacrylate sodium salt, the appearance of the dispersing agent is clear to semitransparent liquid, the solid content of the dispersing agent is 41-44%, the specific gravity (at 25 ℃) of the dispersing agent is 1.30, and the pH value of the dispersing agent is 7-8; the wetting agent was a clear liquid in appearance (25 deg.C), had an active content of about 70%, and had a pH (1% aqueous solution) of6-8, wherein the viscosity at 25 ℃ is about 640 mpa.s; the defoaming agent is polyether siloxane copolymer emulsion, the appearance of the defoaming agent is white thixotropic liquid, the nonvolatile content of the defoaming agent is 22.0-26.0%, the viscosity of the defoaming agent at 25 ℃ is 50-150 mPa.s, and the pH value of the defoaming agent is 7-9; the dispersion stabilizer is viscous liquid in appearance, the solid component is 48-52%, the pH value is about 10-11, and the specific gravity (25 ℃) is 1.12; the rutile titanium dioxide and TiO₂Content (wt.)>90 percent, the pH value of the aqueous suspension is 7.0 to 8.5, and the oil absorption is less than or equal to 20g/100 g; the barium sulfate is white powder in appearance, 800 meshes, 4.25-4.5 g/mL in density and less than or equal to 25g/100g in oil absorption; the acrylic emulsion is milky white liquid in appearance, the solid content (%) is 48 +/-1, the pH value is 7.5-9.0, and the MFT is about 20 ℃; the film-forming auxiliary agent is an alcohol ester high-boiling-point organic compound; the thickening and leveling agent is associated hydrophobic modified polyurethane, is gray-white to beige turbid viscous liquid in appearance, has the solid content of 19-21 percent, the pH value of 5.0-8.0 and the density of 1.02-1.08 g/cm³Viscosity of<10000 cps; the inorganic pigment color paste is special color paste for the Kelaien inorganic paint.

Particularly, the nano inorganic silicon modified silicate solution is a product sold by Foshan lotus leaves in the chemical industry and with the model of WJ-8801; the modified composite silicate toughening powder is a product with SR-637 type sold in the chemical industry of Foshan lotus leaves; the ethyl hydroxyethyl cellulose is a product of EBS451FQ made by Aksu corporation; the dispersant is a product with the model number of FLOSPERSE 3000 produced by France Edison company; the wetting agent is a product with the model number of LCN407 produced by German Clariant company; the antifoaming agent is a product sold by Shenzhen Hairun company and having the model number of CF-1615; the dispersion stabilizer is a product of Dispersogen S PLUS, a model number produced by Germany Kelaien company; the rutile titanium dioxide is a product with the model of R-2195 produced by Shandong Daien company; the barium sulfate is a product sold by Foshan Taihe mining company; the acrylic emulsion is a product of Acroanl 296DS manufactured by BASF corporation; the film-forming assistant is a product with the model number of RUGER RE70 produced by Luge chemical company; the thickening and leveling agent is a product sold by Shenzhen Hairun company and with the model number of TU 2881; the inorganic pigment color paste is an SX series aqueous product produced by Guangzhou Kedi company.

The components, weights and amounts of each component of examples 1-3 and comparative examples 1-2 are shown in table one; in comparative example 1, calcium carbonate is used to replace the modified composite silicate toughening powder; in comparative example 2, the aqueous organic color paste produced by Guangzhou Kedi corporation was used for toning; and a commercially available conventional polyurethane urban greenway paint was purchased and tested as comparative example 3, which is a polyurethane as the primary film-forming material.

Watch 1

Example 1

The embodiment provides a preparation method of an urban green road inorganic silicate coating, which comprises the following steps:

step one, adding 27.9kg of water into a production cylinder, then adding 0.5kg of ethyl hydroxyethyl cellulose under stirring, dispersing for 30min at the rotating speed of 400 r/min, then sequentially adding 0.6kg of dispersing agent, 0.2kg of wetting agent, 0.6kg of defoaming agent, 0.6kg of dispersion stabilizer, 6.0kg of rutile titanium dioxide, 20.0kg of modified composite silicate toughening powder and 4.0kg of 800-mesh barium sulfate under stirring, increasing the stirring speed to 1500 r/min after the addition is finished, and dispersing for 30min at a high speed.

And step two, after the dispersion is finished, reducing the rotating speed to 800 revolutions per minute, sequentially adding 4.0kg of acrylic emulsion, 0.2kg of film-forming assistant, 32.0kg of nano inorganic silicon modified silicate solution and 0.4kg of thickening and leveling agent, and stirring and mixing for 10-15 min at the rotating speed of 800 revolutions per minute after the addition is finished. After being mixed evenly, 3.0kg of inorganic pigment color paste is added under stirring, and the inorganic silicate paint with the required color is prepared after even stirring.

Example 2

The embodiment provides a preparation method of an urban green road inorganic silicate coating, which comprises the following steps:

step one, adding 29.15kg of water into a production cylinder, then adding 0.4kg of ethyl hydroxyethyl cellulose under stirring, dispersing for 30min at the rotating speed of 400 r/min, then sequentially adding 0.7kg of dispersing agent, 0.3kg of wetting agent, 0.5kg of defoaming agent, 0.5kg of dispersion stabilizer, 8.0kg of rutile titanium dioxide, 18.0kg of modified composite silicate toughening powder and 6.0kg of 800-mesh barium sulfate under stirring, increasing the stirring speed to 1500 r/min after the addition is finished, and dispersing for 30min at a high speed.

And step two, after the dispersion is finished, reducing the rotating speed to 800 revolutions per minute, sequentially adding 3.0kg of acrylic emulsion, 0.15kg of film-forming assistant, 31.0kg of nano inorganic silicon modified silicate solution and 0.3kg of thickening and leveling agent, and stirring and mixing for 10-15 min at 800 revolutions per minute after the addition is finished. After being mixed evenly, 2.0kg of inorganic pigment color paste is added and stirred evenly to prepare the inorganic silicate paint with the required color.

Example 3

The embodiment provides a preparation method of an urban green road inorganic silicate coating, which comprises the following steps:

step one, adding 30.4kg of water into a production cylinder, then adding 0.3kg of ethyl hydroxyethyl cellulose under stirring, dispersing for 30min at the rotating speed of 400 r/min, then sequentially adding 0.8kg of dispersing agent, 0.4kg of wetting agent, 0.4kg of defoaming agent, 0.4kg of dispersion stabilizer, 10.0kg of rutile titanium dioxide, 16.0kg of modified composite silicate toughening powder and 8.0kg of 800-mesh barium sulfate under stirring, increasing the stirring speed to 1500 r/min after the addition is finished, and dispersing for 30min at a high speed.

And step two, after the dispersion is finished, reducing the rotating speed to 800 revolutions per minute, sequentially adding 2.0kg of acrylic emulsion, 0.1kg of film-forming assistant, 30.0kg of nano inorganic silicon modified silicate solution and 0.2kg of thickening and leveling agent, and stirring and mixing for 10-15 min at 800 revolutions per minute after the addition is finished. After being mixed evenly, 1.0kg of inorganic pigment color paste is added and stirred evenly to prepare the inorganic silicate paint with the required color.

Comparative example 1

Adding 29.15kg of water into a production cylinder, then adding 0.4kg of ethyl hydroxyethyl cellulose under stirring, dispersing for 30min at the rotating speed of 400 r/min, then adding 0.7kg of dispersing agent, 0.3kg of wetting agent, 0.5kg of defoaming agent, 0.5kg of dispersion stabilizer, 8.0kg of rutile titanium dioxide, 18.0kg of 700-mesh calcium carbonate and 6.0kg of 800-mesh barium sulfate in turn under stirring, increasing the stirring speed to 1500 r/min after the addition is finished, and dispersing for 30min at a high speed.

After the dispersion is finished, the rotating speed is reduced to 800 revolutions per minute, 3.0kg of acrylic emulsion, 0.15kg of film forming additive, 31.0kg of nano inorganic silicon modified silicate solution and 0.3kg of thickening and leveling agent are sequentially added, and the mixture is stirred and mixed for 10-15 min at 800 revolutions per minute after the addition is finished. After mixing uniformly, 2.0kg of SX series inorganic water-based color paste of Guangzhou Kedi company is added and stirred uniformly to prepare the coating with the required color.

Comparative example 2

Adding 29.15kg of water into a production cylinder, then adding 0.4kg of ethyl hydroxyethyl cellulose under stirring, dispersing for 30min at the rotating speed of 400 r/min, then adding 0.7kg of dispersing agent, 0.3kg of wetting agent, 0.5kg of defoaming agent, 0.5kg of dispersion stabilizer, 8.0kg of rutile titanium dioxide, 18.0kg of modified composite silicate toughening powder and 6.0kg of 800-mesh barium sulfate in sequence under stirring, increasing the stirring speed to 1500 r/min after the addition is finished, and dispersing for 30min at a high speed.

After the dispersion is finished, the rotating speed is reduced to 800 revolutions per minute, 3.0kg of acrylic emulsion, 0.15kg of film forming additive, 31.0kg of nano inorganic silicon modified silicate solution and 0.3kg of thickening and leveling agent are sequentially added, and the mixture is stirred and mixed for 10-15 min at 800 revolutions per minute after the addition is finished. After being mixed evenly, 2.0kg of organic water-based color paste is added and stirred evenly to prepare the coating with the required color.

Comparative example 3

A commercially available conventional polyurethane urban greenway paint was purchased as comparative example 3.

The inorganic silicate coatings prepared in the examples 1 to 3 of the invention and the comparative examples 1 to 3 were tested according to the following relevant test standards, and the performance test results are shown in the following table two.

Watch two

From the results in table two, it can be seen that the urban green road inorganic silicate paint prepared by the technology of the present invention uses the nano inorganic silicon modified silicate solution as the main film forming substance instead of the traditional organic materials (such as acrylic acid, polyurethane, etc.) compared with comparative example 1, comparative example 2, and comparative example 3; the hardness and toughness of the inorganic coating are balanced by adding the modified composite silicate toughening powder which can generate bonding reaction with the hydroxyl functional group of the nano inorganic silicon modified silicate film forming substance; when in color matching, inorganic pigment color paste is adopted to replace organic pigment color paste. The product prepared according to the technology has higher hardness, better base layer adhesive force, lower abrasion, faster water permeability, stronger color retention and more suitable construction property, effectively solves the problems of poor use strength, poor abrasion resistance, easy fading, poor water permeability and air permeability and long construction period of the traditional organic coating in the field of urban green road coating, and promotes the application of the inorganic coating in the field of sponge cities.

Claims (4)

1. The urban green road inorganic silicate coating is characterized by being prepared by mixing and modulating the following components in parts by weight:

27.9-30.4 parts of water, 0.3-0.5 part of ethyl hydroxyethyl cellulose, 0.6-0.8 part of dispersing agent, 0.2-0.4 part of wetting agent, 0.4-0.6 part of defoaming agent, 0.4-0.6 part of dispersion stabilizer, 6-10 parts of rutile titanium dioxide, 16-20 parts of modified composite silicate toughening powder capable of carrying out bonding reaction with hydroxyl functional groups of nano inorganic silicon modified silicate solution and 4-8 parts of barium sulfate;

2-4 parts of acrylic emulsion, 0.1-0.2 part of film-forming assistant, 30-32 parts of nano inorganic silicon modified silicate solution, 0.2-0.4 part of thickening and leveling agent and 1-3 parts of inorganic pigment color paste.

2. The urban green road inorganic silicate coating according to claim 1, which is prepared by mixing and blending the following components in parts by weight:

29.15 parts of water, 0.4 part of ethyl hydroxyethyl cellulose, 0.7 part of a dispersing agent, 0.3 part of a wetting agent, 0.5 part of a defoaming agent, 0.5 part of a dispersion stabilizer, 8 parts of rutile titanium dioxide, 18 parts of modified composite silicate toughening powder and 6 parts of barium sulfate;

3 parts of acrylic emulsion, 0.15 part of film-forming additive, 31 parts of nano inorganic silicon modified silicate solution, 0.3 part of thickening and leveling agent and 2 parts of inorganic pigment color paste.

3. The urban green-road inorganic silicate coating according to claim 1 or 2, wherein the nano inorganic silicon modified silicate solution is colorless transparent viscous liquid in appearance, has a solid content of 30%, a pH value of 8.0-11.0, a viscosity of less than 10cps, and an organic content of less than 0.1%; the appearance of the modified composite silicate toughening powder is light grey white fine powder, the pH value of a water suspension is 7.0-8.5, and the relative density is 2.6-2.7.

4. A method of preparing the urban green channel inorganic silicate paint according to claim 1, comprising the steps of:

step one, adding 27.9-30.4 parts of water into a container, then adding 0.3-0.5 part of ethyl hydroxyethyl cellulose under stirring, stirring and dispersing, then sequentially adding 0.6-0.8 part of dispersing agent, 0.2-0.4 part of wetting agent, 0.4-0.6 part of defoaming agent, 0.4-0.6 part of dispersion stabilizer, 6-10 parts of rutile titanium dioxide, 16-20 parts of modified composite silicate toughening powder and 4-8 parts of barium sulfate under stirring, and dispersing at high speed after adding;

and step two, after the dispersion is finished, reducing the rotating speed, sequentially adding 2-4 parts of acrylic emulsion, 0.1-0.2 part of film-forming additive, 30-32 parts of nano inorganic silicon modified silicate solution and 0.2-0.4 part of thickening and leveling agent, stirring and mixing uniformly after the addition is finished, then adding 1-3 parts of inorganic pigment color paste under the stirring state, stirring uniformly, and preparing the inorganic silicate paint with the required color.