CN110642972A - Weather-resistant exterior wall coating with 10-year gradient colors and manufacturing method thereof - Google Patents

Abstract

The invention discloses a weather-resistant exterior wall coating with 10-year gradient colors and a manufacturing method thereof, wherein the exterior wall coating consists of three parts, namely a real stone substrate, a color-changing component and an adhesive component; wherein the adhesive component is colloid obtained by the reaction of 50 to 60 parts of methyl methacrylate, 0.1 to 0.2 part of azodiisobutyronitrile, 5 to 6 parts of dibutyl phthalate, 1 to 1.2 parts of stearic acid and 0.5 to 0.8 part of methacrylic acid monomer; the functional component is a solid powder mixture which is composed of 1 to 2 parts of iron powder and 1 to 2 parts of titanium dioxide powder; the real stone substrate is a real stone substrate constructed by 75-80 parts of quartz sand and 0.4-0.6 part of Istmann C-12 film-forming assistant. The present invention has a color-changing performance with a cycle of about 10 years.

Description

Weather-resistant exterior wall coating with 10-year gradient colors and manufacturing method thereof

Technical Field

The invention relates to the technical field of exterior wall coatings, in particular to a weather-resistant exterior wall coating with 10-year gradient colors and a manufacturing method thereof.

Background

The exterior wall coating in the prior art has the appearance color of initial color, almost all exterior wall coatings have the invariable color layer forever due to the problems of cost and management, and the visual fatigue and the living experience are easily caused.

Therefore, an exterior wall coating having a color change performance with a cycle of about 10 years is urgently needed in the market.

Disclosure of Invention

The invention aims to provide an exterior wall coating with color change performance taking 10 years as a period.

In order to achieve the purpose, the invention adopts the following technical scheme: a weatherable exterior wall coating with 10-year gradient color comprises three parts, namely a real stone substrate, a discoloring component and an adhesive component; wherein the adhesive component is colloid obtained by the reaction of 50 to 60 parts of methyl methacrylate, 0.1 to 0.2 part of azodiisobutyronitrile, 5 to 6 parts of dibutyl phthalate, 1 to 1.2 parts of stearic acid and 0.5 to 0.8 part of methacrylic acid monomer; the functional component is a solid powder mixture which is composed of 1 to 2 parts of iron powder and 1 to 2 parts of titanium dioxide powder; the real stone substrate is a real stone substrate constructed by 75-80 parts of quartz sand and 0.4-0.6 part of Istmann C-12 film-forming assistant.

A manufacturing method of a weather-resistant exterior wall coating with 10-year gradient colors comprises the following steps;

1) raw material preparation

Preparing raw materials: preparing 1-2 parts of iron powder, 1-2 parts of titanium dioxide powder, 50-60 parts of methyl methacrylate, 0.1-0.2 part of azodiisobutyronitrile, 5-6 parts of dibutyl phthalate, 1-1.2 parts of stearic acid, 0.5-0.8 part of methacrylic acid monomer, 75-80 parts of quartz sand and 0.4-0.6 part of Istmann C-12 film-forming aid by weight;

2) manufacture of functional mixed colloid

Firstly, ball-milling the iron powder and the titanium dioxide powder prepared in the step 1) into 1200-1600-mesh powder, and then uniformly mixing to obtain a functional material;

secondly, mixing the functional materials obtained in the step I with the methyl methacrylate, azodiisobutyronitrile, dibutyl phthalate, stearic acid and methacrylic acid monomers prepared in the step 1) and uniformly stirring, then heating to 93-98 ℃, and carrying out prepolymerization for 10-12 min to obtain a mixed prepolymer;

thirdly, placing the mixed prepolymer prepared in the second step in a water bath, preserving heat to 50-53 ℃, preserving heat for 11-12 h, then heating to 100 ℃, preserving heat for 60-80 min, cooling to room temperature at a cooling rate of 0.3-0.5 ℃/min, and spray-drying the reaction liquid cooled to room temperature to obtain colloidal particles, namely the mixed colloid with the required functions;

3) paint manufacture

Mixing and uniformly stirring the quartz sand prepared in the step 1) in the stage 1) and the functional mixed colloid obtained in the stage 2), heating the obtained mixture to be molten, keeping for 8-10 min to obtain a primary reactant, and maintaining the temperature;

secondly, mixing the Istman C-12 film-forming additive prepared in the step 1) into the primary reactant obtained in the step I, uniformly stirring, and continuously preserving the heat for 20-25 min to obtain a reactant;

and thirdly, heating the reactant obtained in the step two to be molten, wherein the molten mass is the weather-resistant external wall coating with the gradually changed colors in the required 10 years.

The using method of the invention comprises the following steps: the coating is directly sprayed on the outer wall surface after being heated and melted, primer and strickling are not needed, the thickness of the coating is 0.1-3 mm, the operation is simple, and the quality is easy to control.

Compared with the prior art, the invention has the following advantages: (1) under the condition of sufficient sunlight without manual interference, the color of the glass can change automatically every decade, the glass is in a nearly completely transparent state initially, and meanwhile, the glass flickers in the sunlight to have metallic luster; the color of the mixture is changed into a semi-transparent state for about 10 years for the first time, the mixture is blue, and the color of the mixture contains trace green and sparkling precious stones; after 10 years (namely about 20 years), the coating is in a gelatinized coating state which mainly takes golden color and is orange yellow, which is a color change state that the prior art does not have. (2) Compared with the prior art, the real stone paint serving as the matrix is not added with an adhesive or any other additive except a film-forming additive, so that the real stone paint is more environment-friendly, and the real stone components without the functional additive cannot be cured on the surface of a building, so that a semi-finished product PMMA which is not completely polymerized, still retains part of activity and does not terminate polymerization reaction is added, the material can be cured at an accelerated speed under the action of a purple line, and the wall surface bonding force equivalent to that of the conventional real stone paint and the surface hardness far higher than that of the conventional real stone paint are obtained just by making up for the short plate without the auxiliary agent and with lower strength, so that the real stone paint is more wear-resistant. (3) PMMA has good weather resistance but poor oxygen resistance, is assisted by a real stone substrate, has complementary short phases, obtains a coating with good overall performance, but has the defects of poor high temperature resistance (the coating can only be maintained for 24 hours at 65 ℃ by actual measurement, namely the coating can slowly deteriorate, and has no obvious change after being tested for 1000 hours at 50 ℃) and poor acid resistance (so the coating can not be suitable for areas with heavy air pollution and more acid rain). Therefore, the present invention has the characteristic of having the color change performance with the period of about 10 years.

Detailed Description

The invention is realized by utilizing the principle that PMMA colloid is weather-resistant and oxygen-resistant and the principle that silicon dioxide powder does not obstruct oxygen, the PMMA is gradually aged and hardened under the action of ultraviolet rays and oxygen, the volume is reduced, a cavity is formed, the iron powder and the titanium dioxide powder which are completely and tightly wrapped by the PMMA colloid are contacted with air (the aging time is measured to be about 10 years through an accelerated test), under the combined action of photocatalyst of titanium dioxide and photo-thermal, water, carbon dioxide and oxygen, the iron powder is gradually converted into ferrous ion salt (such as FeCO3), the light reverse effect of the ferrous ion and the tetravalent titanium ion refracts the Bao blue light (similar to olivine, siderite or sapphire in principle) through light refraction, diffraction, reflection and the like in the PMMA colloid and silicon dioxide which are aged to be light yellow and semi-transparent states, and the Bao blue light is cross-printed with the light yellow and semi-transparent PMMA colloid; with the increase of the cavity and the aggravation of the reaction, the divalent iron ion salt and the tetravalent titanium ion (titanium dioxide) gradually undergo electron migration under the action of ultraviolet irradiation, the valence state of the divalent iron ion and the trivalent titanium ion is converted into a valence state (the process is about 8-10 years) of the trivalent iron ion and the trivalent titanium ion, the valence state is totally golden, the valence state is combined with the PMMA colloid which is more aged at the moment and is transparent and similar to ground glass, the golden state is a gelatinized state (the principle refers to andalusite), the electron migration is reversible, the PMMA is softened when being heated (about 150 ℃ for 1h, of course, and the oxidation degree of the PMMA is deepened, namely, the surface of the integral coating is rougher), the trivalent iron ion and the trivalent titanium ion are converted back into the divalent iron ion salt and the tetravalent titanium ion, namely, the color returns to the blue-green color, and the matrix state at the moment is combined, an opaque dark blue or indigo color is present, i.e. a third color change can occur under manual intervention.

Example 1:

a weatherable exterior wall coating with 10-year gradient color comprises three parts, namely a real stone substrate, a discoloring component and an adhesive component; wherein the adhesive component is colloid obtained by the reaction of methyl methacrylate, azodiisobutyronitrile, dibutyl phthalate, stearic acid and methacrylic acid monomers; the functional component is a solid powder mixture constructed by iron powder and titanium dioxide powder; the real stone substrate is a real stone substrate constructed by quartz sand and Istmann C-12 film-forming auxiliary agent;

the manufacturing method of the exterior wall coating comprises the following steps;

1) raw material preparation

Preparing raw materials: preparing 11.2Kg of iron powder, 16Kg of titanium dioxide powder, 520Kg of methyl methacrylate, 1.2Kg of azobisisobutyronitrile, 56Kg of dibutyl phthalate, 11Kg of stearic acid, 7Kg of methacrylic acid monomer, 780Kg of quartz sand and 5Kg of Istman C-12 film-forming aid by weight;

2) manufacture of functional mixed colloid

Firstly, ball-milling the iron powder and the titanium dioxide powder prepared in the step 1) into 1200-1600-mesh powder, and then uniformly mixing to obtain a functional material;

secondly, mixing the functional materials obtained in the step I with the methyl methacrylate, azodiisobutyronitrile, dibutyl phthalate, stearic acid and methacrylic acid monomers prepared in the step 1) and uniformly stirring, then heating to 93-98 ℃, and carrying out prepolymerization for 10-12 min to obtain a mixed prepolymer;

thirdly, placing the mixed prepolymer prepared in the second step in a water bath, preserving heat to 50-53 ℃, preserving heat for 11-12 h, then heating to 100 ℃, preserving heat for 60-80 min, cooling to room temperature at a cooling rate of 0.3-0.5 ℃/min, and spray-drying the reaction liquid cooled to room temperature to obtain colloidal particles, namely the mixed colloid with the required functions;

3) paint manufacture

Mixing and uniformly stirring the quartz sand prepared in the step 1) in the stage 1) and the functional mixed colloid obtained in the stage 2), heating the obtained mixture to be molten, keeping for 8-10 min to obtain a primary reactant, and maintaining the temperature;

secondly, mixing the Istman C-12 film-forming additive prepared in the step 1) into the primary reactant obtained in the step I, uniformly stirring, and continuously preserving the heat for 20-25 min to obtain a reactant;

and thirdly, heating the reactant obtained in the step two to be molten, wherein the molten mass is the weather-resistant external wall coating with the gradually changed colors in the required 10 years.

The bonding force grade of the invention is 1-2 grade according to GB/T9286-1998 test, the surface hardness after curing is 2.5H-4H, accelerated test is carried out at 25 ℃ to ensure that the mechanical property is reduced by not more than 5% in 20 years and the wall surface bonding force is reduced by not more than 8%, because the structure is compact and neutral rainwater is not feared, two times of large color change are carried out in about 10 years, namely colorless and transparent-blue-green-golden orange, and third color change can be realized under artificial interference, namely the bluish indigo color, which is the same as the following.

Example 2:

the whole is in accordance with example 1, with the difference that:

the manufacturing method of the exterior wall coating comprises the following steps;

1) raw material preparation

Preparing raw materials: preparing 10Kg of iron powder, 10Kg of titanium dioxide powder, 600Kg of methyl methacrylate, 2Kg of azobisisobutyronitrile, 60Kg of dibutyl phthalate, 12Kg of stearic acid, 8Kg of methacrylic acid monomer, 750Kg of quartz sand and 4Kg of Istman C-12 film-forming aid in parts by weight;

example 3:

the whole is in accordance with example 1, with the difference that:

the manufacturing method of the exterior wall coating comprises the following steps;

1) raw material preparation

Preparing raw materials: preparing 20Kg of iron powder, 20Kg of titanium dioxide powder, 500Kg of methyl methacrylate, 1Kg of azobisisobutyronitrile, 50Kg of dibutyl phthalate, 10Kg of stearic acid, 5Kg of methacrylic acid monomer, 800Kg of quartz sand and 6Kg of Istman C-12 film-forming aid in parts by weight;

the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (2)

1. The weather-resistant exterior wall coating with the 10-year gradual change color is characterized in that: the weather-resistant exterior wall coating with 10-year gradient colors consists of three parts, namely a real stone substrate, a color-changing component and an adhesive component; wherein the adhesive component is colloid obtained by the reaction of 50 to 60 parts of methyl methacrylate, 0.1 to 0.2 part of azodiisobutyronitrile, 5 to 6 parts of dibutyl phthalate, 1 to 1.2 parts of stearic acid and 0.5 to 0.8 part of methacrylic acid monomer; the functional component is a solid powder mixture which is composed of 1 to 2 parts of iron powder and 1 to 2 parts of titanium dioxide powder; the real stone substrate is a real stone substrate constructed by 75-80 parts of quartz sand and 0.4-0.6 part of Istmann C-12 film-forming assistant.

2. A manufacturing method of a weather-resistant exterior wall coating with 10-year gradient colors is characterized by comprising the following steps;

1) raw material preparation

Preparing raw materials: preparing 1-2 parts of iron powder, 1-2 parts of titanium dioxide powder, 50-60 parts of methyl methacrylate, 0.1-0.2 part of azodiisobutyronitrile, 5-6 parts of dibutyl phthalate, 1-1.2 parts of stearic acid, 0.5-0.8 part of methacrylic acid monomer, 75-80 parts of quartz sand and 0.4-0.6 part of Istmann C-12 film-forming aid by weight;

2) manufacture of functional mixed colloid

Firstly, ball-milling the iron powder and the titanium dioxide powder prepared in the step 1) into 1200-1600-mesh powder, and then uniformly mixing to obtain a functional material;

secondly, mixing the functional materials obtained in the step I with the methyl methacrylate, azodiisobutyronitrile, dibutyl phthalate, stearic acid and methacrylic acid monomers prepared in the step 1) and uniformly stirring, then heating to 93-98 ℃, and carrying out prepolymerization for 10-12 min to obtain a mixed prepolymer;

thirdly, placing the mixed prepolymer prepared in the second step in a water bath, preserving heat to 50-53 ℃, preserving heat for 11-12 h, then heating to 100 ℃, preserving heat for 60-80 min, cooling to room temperature at a cooling rate of 0.3-0.5 ℃/min, and spray-drying the reaction liquid cooled to room temperature to obtain colloidal particles, namely the mixed colloid with the required functions;

3) paint manufacture

Mixing and uniformly stirring the quartz sand prepared in the step 1) in the stage 1) and the functional mixed colloid obtained in the stage 2), heating the obtained mixture to be molten, keeping for 8-10 min to obtain a primary reactant, and maintaining the temperature;

secondly, mixing the Istman C-12 film-forming additive prepared in the step 1) into the primary reactant obtained in the step I, uniformly stirring, and continuously preserving the heat for 20-25 min to obtain a reactant;

and thirdly, heating the reactant obtained in the step two to be molten, wherein the molten mass is the weather-resistant external wall coating with the gradually changed colors in the required 10 years.