Water-based, flame-retardant, thermal-insulation and self-cleaning coating for steel structures and preparation method of coating

Abstract

The invention provides a water-based, flame-retardant, thermal-insulation and self-cleaning coating for steel structures. The coating comprises a nano SiO2 aerogel bottom coating layer and a water-based fluorocarbon self-cleaning surface coating layer. The nano SiO2 aerogel bottom coating layer has flame-retardant and thermal-insulation effects, the water-based fluorocarbon self-cleaning surface coating layer has self-cleaning and anti-corrosion effects, so that the coating is convenient to construct and lower in cost and can have flame-retardant, thermal-insulation, self-cleaning and anti-corrosion effects.

Description

technical field

[0001] The invention relates to the technical field of environmental protection materials, in particular to a flame-retardant, heat-insulating and heat-preserving self-cleaning coating for water-based steel structures and a preparation method thereof. Background technique

[0002] Due to the characteristics of light weight and good ductility, steel structure materials have become the most important structural form of large space buildings. Steel has the characteristics of earthquake resistance and bending resistance, but its mechanical properties will decrease rapidly under the influence of outdoor climate, diurnal temperature difference, etc. With the rapid development of steel structure buildings, the technical problems of steel structure anticorrosion protection become more prominent, so it is necessary to The steel structure is protected against corrosion to prevent the mechanical properties of the steel structure, such as yield point, tensile strength an...

Examples

preparation example Construction

[0051] The present invention also provides a method for preparing a water-based steel structure with flame-retardant heat-insulating self-cleaning coating, comprising the following steps:

[0052] Step S110: preparing an aqueous acrylic emulsion.

[0053] In some preferred embodiments, the preparation of aqueous acrylic emulsion comprises the following steps:

[0054] Step S111: After mixing deionized water, emulsifier, initiator and pH buffering agent, the temperature is raised to 65-75° C. to form a first mixed solution;

[0055] Step S112: Mix the acrylate monomer, the organosilicon monomer, the hydrolysis inhibitor and the first mixed solution evenly, then raise the temperature to 70-85° C., and keep it warm for 2-3 hours to form a second mixed solution;

[0056] Step S113: cooling the second mixed solution to below 45°C, adjusting the pH to 7-8 with triethylamine, and obtaining the aqueous silicon-acrylic emulsion after discharging;

[0057] The water-based silicone acr...

Embodiment 1

[0068] According to the mass parts of Example 1 in Table 1, the water-based exterior wall thermal insulation self-cleaning coating is prepared, and its preparation method is as follows:

[0069] The first step: prepare water-based acrylic emulsion, comprising the following steps:

[0070] 1) In a four-necked round-bottom flask equipped with a stirring rod, a thermometer, a condenser tube, and a constant pressure funnel, add 41 g of deionized water, 4 g of sodium dodecylbenzenesulfonate, 0.2 g of ammonium persulfate and 0.2 g of sodium bicarbonate g, warming up to 65°C, stirring at 200 rpm;

[0071] 2) Mix 35g of butyl acrylate monomer, 4g of hydroxyethyl methacrylate, 10g of vinyltrimethoxysilane, and 2g of propylene glycol, put them in a constant pressure funnel, drop them into the above-mentioned four-necked flask at a constant speed, and add dropwise After completion, the temperature was raised to 70° C., and the reaction was kept for 3 hours;

[0072] 3) After the reacti...

Embodiment 2

[0076] According to the mass parts of embodiment 2 in table 1, prepare water-based external wall thermal insulation self-cleaning coating, its preparation method is as follows:

[0077] The first step: prepare water-based acrylic emulsion, comprising the following steps:

[0078] 1) In a four-necked round-bottomed flask equipped with a stirring rod, a thermometer, a condenser, and a constant pressure funnel, add 50 g of deionized water, 6 g of octylphenol polyoxyethyl ether, 0.4 g of sodium bisulfite and 0.3 g of sodium bicarbonate g, heat up to 75°C, and stir at 200 rpm.

[0079] 2) Mix 30g of butyl propacrylate monomer, 20g of methyl methacrylate, 5g of hydroxyethyl methacrylate, 2g of vinyltriethoxysilane, and 5g of propylene glycol, place in a constant pressure funnel, and drop at a constant speed Add it into the above-mentioned four-neck flask. After the dropwise addition is completed, the temperature is raised to 85° C., and the reaction is kept for 2 hours.

[0080] 3...

technical field

[0001] The invention relates to the technical field of environmental protection materials, in particular to a flame-retardant, heat-insulating and heat-preserving self-cleaning coating for water-based steel structures and a preparation method thereof. Background technique

[0002] Due to the characteristics of light weight and good ductility, steel structure materials have become the most important structural form of large space buildings. Steel has the characteristics of earthquake resistance and bending resistance, but its mechanical properties will decrease rapidly under the influence of outdoor climate, diurnal temperature difference, etc. With the rapid development of steel structure buildings, the technical problems of steel structure anticorrosion protection become more prominent, so it is necessary to The steel structure is protected against corrosion to prevent the mechanical properties of the steel structure, such as yield point, tensile strength an...

Examples

preparation example Construction

[0051] The present invention also provides a method for preparing a water-based steel structure with flame-retardant heat-insulating self-cleaning coating, comprising the following steps:

[0052] Step S110: preparing an aqueous acrylic emulsion.

[0053] In some preferred embodiments, the preparation of aqueous acrylic emulsion comprises the following steps:

[0054] Step S111: After mixing deionized water, emulsifier, initiator and pH buffering agent, the temperature is raised to 65-75° C. to form a first mixed solution;

[0055] Step S112: Mix the acrylate monomer, the organosilicon monomer, the hydrolysis inhibitor and the first mixed solution evenly, then raise the temperature to 70-85° C., and keep it warm for 2-3 hours to form a second mixed solution;

[0056] Step S113: cooling the second mixed solution to below 45°C, adjusting the pH to 7-8 with triethylamine, and obtaining the aqueous silicon-acrylic emulsion after discharging;

[0057] The water-based silicone acr...

Embodiment 1

[0068] According to the mass parts of Example 1 in Table 1, the water-based exterior wall thermal insulation self-cleaning coating is prepared, and its preparation method is as follows:

[0069] The first step: prepare water-based acrylic emulsion, comprising the following steps:

[0070] 1) In a four-necked round-bottom flask equipped with a stirring rod, a thermometer, a condenser tube, and a constant pressure funnel, add 41 g of deionized water, 4 g of sodium dodecylbenzenesulfonate, 0.2 g of ammonium persulfate and 0.2 g of sodium bicarbonate g, warming up to 65°C, stirring at 200 rpm;

[0071] 2) Mix 35g of butyl acrylate monomer, 4g of hydroxyethyl methacrylate, 10g of vinyltrimethoxysilane, and 2g of propylene glycol, put them in a constant pressure funnel, drop them into the above-mentioned four-necked flask at a constant speed, and add dropwise After completion, the temperature was raised to 70° C., and the reaction was kept for 3 hours;

[0072] 3) After the reacti...

Embodiment 2

[0076] According to the mass parts of embodiment 2 in table 1, prepare water-based external wall thermal insulation self-cleaning coating, its preparation method is as follows:

[0077] The first step: prepare water-based acrylic emulsion, comprising the following steps:

[0078] 1) In a four-necked round-bottomed flask equipped with a stirring rod, a thermometer, a condenser, and a constant pressure funnel, add 50 g of deionized water, 6 g of octylphenol polyoxyethyl ether, 0.4 g of sodium bisulfite and 0.3 g of sodium bicarbonate g, heat up to 75°C, and stir at 200 rpm.

[0079] 2) Mix 30g of butyl propacrylate monomer, 20g of methyl methacrylate, 5g of hydroxyethyl methacrylate, 2g of vinyltriethoxysilane, and 5g of propylene glycol, place in a constant pressure funnel, and drop at a constant speed Add it into the above-mentioned four-neck flask. After the dropwise addition is completed, the temperature is raised to 85° C., and the reaction is kept for 2 hours.

[0080] 3...

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