阅读说明：本技术 一种无罩面耐污耐候水性多彩建筑涂料的制备方法 (Preparation method of cover-free stain-resistant weather-resistant water-based multicolor building coating ) 是由 孙斌 朱林红 于 2020-06-04 设计创作，主要内容包括：本发明公开了一种无罩面耐污耐候水性多彩建筑涂料的制备方法,将200-250份的5％的多彩瓜儿豆胶、0.5-0.8份的EHEC纤维素、600-650份的步骤二分散相色漆、200-250的步骤三多彩连续相依次送入到反应釜中,以500-1000r/min的转速搅拌45-55min,反应结束,得到无罩面多彩涂料。本发明可提高水性多彩涂料的应用性能,无需采用罩面,来减化水性多彩涂料施工的施工工艺及施工工序,降低施工成本,提高施工效率；同时满足水性多彩的高装饰性和使用持久性,特别是保色性、耐候性和抗发花性等。(The invention discloses a preparation method of a cover-free stain-resistant weather-resistant water-based multicolor building coating, which comprises the steps of sequentially feeding 200-250 parts of 5% multicolor guar gum, 0.5-0.8 part of EHEC cellulose, 650 parts of step two-dispersed phase color paint and 200-250 parts of multicolor continuous phase into a reaction kettle, stirring at the rotating speed of 500-1000r/min for 45-55min, and finishing the reaction to obtain the cover-free multicolor coating. The invention can improve the application performance of the water-based multicolor paint, does not need to adopt a finish coat, simplifies the construction process and the construction procedure of the water-based multicolor paint construction, reduces the construction cost and improves the construction efficiency; simultaneously satisfies the high decoration and the use durability of the aqueous multicolor, in particular the color retention, the weather resistance, the anti-blooming property and the like.)

1. A preparation method of a cover-free stain-resistant weather-resistant water-based multicolor building coating is characterized by comprising the following steps:

step one, preparing a colored primer:

(1) weighing raw materials: 300 parts of water 250-containing organic silicon powder, 2.0-3.0 parts of emulsified silicone oil defoaming agent, 1.5-3.0 parts of ethyl hydroxyethyl cellulose ether, 3.0-5.0 parts of polycarboxylic acid sodium salt dispersant, 4.0-6.0 parts of polyacrylic acid ammonium salt dispersant, 2.0-3.0 parts of alkylphenol polyoxyethylene ether nonionic wetting agent, 15-20 parts of propylene glycol, 125 parts of rutile titanium dioxide powder, 50-75 parts of superfine kaolin, 50-75 parts of superfine wollastonite, 125 parts of heavy calcium carbonate, 50-75 parts of superfine talcum powder, 100-containing 150 parts of high Tg styrene-acrylate emulsion, 150 parts of salting-out resistant primer high Tg emulsion 125-containing organic silicon powder, 2.0-3.0 parts of sodium benzoate green preservative, 2.0-3.0 parts of sodium carbonate PH regulator and 1-2 parts of arabic gum thickener;

(2) preparing a primer: sequentially adding the raw materials in the step (1) into a stirrer, firstly stirring at a high speed of 1000-;

step two, weighing the ratio of the colorful dispersed phase colored paint: 420 parts of 380-mesh glass-wool, 0.5-1.5 parts of polycarboxylic acid sodium salt dispersant, 2.0-3.0 parts of organosilicon foam inhibitor, 2.5-4.0 parts of high-temperature preservative, 5-10 parts of titanium dioxide, 8-12 parts of self-made modified bentonite, 1-1.5 parts of sodium carbonate PH regulator, 2.0-3.0 parts of propylene glycol butyl ether film-forming aid, 4.0-6.0 parts of propylene glycol, 150 parts of inorganic graft modified acrylic emulsion, 45-60 parts of 10% protective colloid, 400 parts of 80-120-mesh glass-wool and 350-mesh glass-wool and 10-30 parts of color paste;

step three, weighing the formula of the colorful continuous phase: 420 parts of water 380 ion-mixed material, 2.0-3.0 parts of sodium lactate preservative, 0.8-1.2 parts of self-made modified bentonite, 10-12 parts of propylene glycol, 1.0-2.0 parts of silicone emulsion defoamer, 2.0-3.0 parts of sodium carbonate PH regulator, 5.0-7.0 parts of propylene glycol butyl ether film-forming aid, 600 parts of matte hydroxyl modified polyacrylic acid PMMA grafted emulsion 550 ion-mixed material and 1-5 parts of gum arabic thickener;

step four, preparing the cover-free multicolor paint: 200-250 parts of 5% colorful guar gum, 0.5-0.8 part of EHEC cellulose, 600-650 parts of step two-dispersion phase color paint and 200-250 parts of colorful continuous phase are sequentially sent into a reaction kettle, stirred for 45-55min at the rotating speed of 500-1000r/min, and the reaction is finished to obtain the cover-free colorful coating.

2. The method for preparing the cover-free stain-resistant weather-resistant water-based multicolor architectural coating as claimed in claim 1, wherein the high-temperature preservative in the multicolor dispersed phase colored paint is prepared from polyethylene polyamine, sodium chloride and sodium lactate according to the weight ratio of 1:2: 1.

3. The method for preparing a cover-free stain-resistant weather-resistant aqueous multicolor building coating according to claim 1, wherein the protective colloid in the multicolor dispersed-phase colored paint is one of locust bean gum, carob bean gum, guar gum and karaya gum.

4. The method for preparing the cover-free stain-resistant weather-resistant water-based multicolor architectural coating according to claim 1, wherein the color paste in the multicolor dispersion phase color paint is one of iron oxide red, iron oxide green, iron oxide black and iron oxide yellow.

5. The preparation method of the cover-free stain-resistant weather-resistant water-based multicolor architectural coating according to claim 1, wherein the preparation method of the homemade modified bentonite comprises the following steps: the bentonite is firstly sent into a silane coupling agent KH560 for coupling treatment, then sent into a plasma box for bombardment with the bombardment power of 100-200W and the bombardment time of 20-30min, and finally sent into a calcining furnace for thermal calcining treatment, and the process is finished.

6. The method for preparing the cover-free stain-resistant weather-resistant waterborne multicolor architectural coating according to claim 5, wherein the specific operations of the thermal calcination are as follows: the temperature is raised to 300-400 ℃ at the speed of 2 ℃/min, nitrogen flow impact is adopted during calcination, and the flow rate of the nitrogen flow is 1-2L/min.

7. The method for preparing the cover-free stain-resistant weather-resistant waterborne multicolor architectural coating according to claim 1, wherein the inorganic graft-modified acrylic emulsion is titanium dioxide graft-modified acrylic emulsion.

8. The preparation method of the cover-free stain-resistant weather-resistant water-based multicolor architectural coating as claimed in claim 1, wherein the preparation method of the matte hydroxyl group modified polyacrylic acid PMMA grafted emulsion comprises the following steps: adding the water-based matte hydroxyl acrylic resin into a magnetic stirrer, then adding an ethanol solution and divinylbenzene, stirring at the rotating speed of 100-200r/min for 15-25min, finally adding PMMA and azodiisobutyronitrile, raising the temperature to 80-100 ℃, and continuing to react for 15-25 min.

9. The method for preparing the cover-free stain-resistant weather-resistant waterborne multicolor building coating as claimed in claim 1, wherein the construction method using the cover-free stain-resistant weather-resistant waterborne multicolor building coating comprises the following steps: the transparent seal primer is firstly brushed on a substrate by adopting a wool roller, then the cover-free colorful paint is sprayed by adopting an LPHV spray gun, and finally the masking paper is removed, wherein the thickness of the colored primer is 0.2-0.3mm, and the thickness of the cover-free colorful paint is 1-2 mm.

Technical Field

The invention relates to the technical field of building coatings, in particular to a preparation method of a cover-free stain-resistant weather-resistant water-based multicolor building coating.

Background

The paint is a material which can be well adhered to a substrate material and form a complete and tough protective film on the surface of an object, and is called paint. Coatings are the same concept as paints. The paint is a well-established name of people, and is always utilized in the building industry after being introduced into China. The effect of the coating can be summarized in three aspects: protection, decoration and special functions. General composition of the coating: comprises film forming matter, pigment and filler, solvent and auxiliary agent. The coating is a continuous film which is coated on the surface of a protected or decorated object and can form firm adhesion with the object to be coated, and is a viscous liquid which is prepared by taking resin, oil or emulsion as a main material, adding or not adding pigments and fillers, adding corresponding auxiliary agents and using organic solvent or water.

The existing building coating adopts a finish coat to be matched with water-based multicolor, and simultaneously the coating consists of water-based seal primer, water-based line paint, multicolor matching middle coat, water-based multicolor main material and water-based finish coat varnish, the process is complex, and in addition, the performances of stain resistance, weather resistance and the like of the coating are poor, and further improvement treatment is needed.

Disclosure of Invention

The invention aims to provide a preparation method of a cover-free stain-resistant weather-resistant water-based multicolor architectural coating, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a preparation method of a cover-free stain-resistant weather-resistant water-based multicolor building coating, which comprises the following steps:

step one, preparing a colored primer:

(1) weighing raw materials: 300 parts of water 250-containing organic silicon powder, 2.0-3.0 parts of emulsified silicone oil defoaming agent, 1.5-3.0 parts of ethyl hydroxyethyl cellulose ether, 3.0-5.0 parts of polycarboxylic acid sodium salt dispersant, 4.0-6.0 parts of polyacrylic acid ammonium salt dispersant, 2.0-3.0 parts of alkylphenol polyoxyethylene ether nonionic wetting agent, 15-20 parts of propylene glycol, 125 parts of rutile titanium dioxide powder, 50-75 parts of superfine kaolin, 50-75 parts of superfine wollastonite, 125 parts of heavy calcium carbonate, 50-75 parts of superfine talcum powder, 100-containing 150 parts of high Tg styrene-acrylate emulsion, 150 parts of salting-out resistant primer high Tg emulsion 125-containing organic silicon powder, 2.0-3.0 parts of sodium benzoate green preservative, 2.0-3.0 parts of sodium carbonate PH regulator and 1-2 parts of arabic gum thickener;

(2) preparing a primer: sequentially adding the raw materials in the step (1) into a stirrer, firstly stirring at a high speed of 1000-;

step two, weighing the ratio of the colorful dispersed phase colored paint: 420 parts of 380-mesh glass-wool, 0.5-1.5 parts of polycarboxylic acid sodium salt dispersant, 2.0-3.0 parts of organosilicon foam inhibitor, 2.5-4.0 parts of high-temperature preservative, 5-10 parts of titanium dioxide, 8-12 parts of self-made modified bentonite, 1-1.5 parts of sodium carbonate PH regulator, 2.0-3.0 parts of propylene glycol butyl ether film-forming aid, 4.0-6.0 parts of propylene glycol, 150 parts of inorganic graft modified acrylic emulsion, 45-60 parts of 10% protective colloid, 400 parts of 80-120-mesh glass-wool and 350-mesh glass-wool and 10-30 parts of color paste;

step three, weighing the formula of the colorful continuous phase: 420 parts of water 380 ion-mixed material, 2.0-3.0 parts of sodium lactate preservative, 0.8-1.2 parts of self-made modified bentonite, 10-12 parts of propylene glycol, 1.0-2.0 parts of silicone emulsion defoamer, 2.0-3.0 parts of sodium carbonate PH regulator, 5.0-7.0 parts of propylene glycol butyl ether film-forming aid, 600 parts of matte hydroxyl modified polyacrylic acid PMMA grafted emulsion 550 ion-mixed material and 1-5 parts of gum arabic thickener;

step four, preparing the cover-free multicolor paint: 200-250 parts of 5% colorful guar gum, 0.5-0.8 part of EHEC cellulose, 600-650 parts of step two-dispersion phase color paint and 200-250 parts of colorful continuous phase are sequentially sent into a reaction kettle, stirred for 45-55min at the rotating speed of 500-1000r/min, and the reaction is finished to obtain the cover-free colorful coating.

Preferably, the high-temperature preservative in the multicolor disperse-phase colored paint is prepared from polyethylene polyamine, sodium chloride and sodium lactate according to the weight ratio of 1:2: 1.

Preferably, the protective colloid in the multicolor dispersed phase color paint is one of locust bean gum, carob bean gum, guar gum and karaya gum.

Preferably, the color paste in the multicolor dispersion phase color paint is one of iron oxide red, iron oxide green, iron oxide black and iron oxide yellow.

Preferably, the preparation method of the homemade modified bentonite comprises the following steps: the bentonite is firstly sent into a silane coupling agent KH560 for coupling treatment, then sent into a plasma box for bombardment with the bombardment power of 100-200W and the bombardment time of 20-30min, and finally sent into a calcining furnace for thermal calcining treatment, and the process is finished.

Preferably, the specific operation of the thermal calcination is: the temperature is raised to 300-400 ℃ at the speed of 2 ℃/min, nitrogen flow impact is adopted during calcination, and the flow rate of the nitrogen flow is 1-2L/min.

Preferably, the inorganic graft-modified acrylic emulsion is a titanium dioxide graft-modified acrylic emulsion.

Preferably, the preparation method of the matte hydroxyl modified polyacrylic acid PMMA grafted emulsion comprises the following steps: adding the water-based matte hydroxyl acrylic resin into a magnetic stirrer, then adding an ethanol solution and divinylbenzene, stirring at the rotating speed of 100-200r/min for 15-25min, finally adding PMMA and azodiisobutyronitrile, raising the temperature to 80-100 ℃, and continuing to react for 15-25 min.

Preferably, the construction method of the coverless stain-resistant weather-resistant water-based multicolor architectural coating comprises the following steps: firstly brushing the colored primer on a substrate by adopting a wool roller, then spraying the cover-free colorful paint by adopting an LPHV spray gun, and finally removing the masking paper, wherein the thickness of the colored primer is 0.2-0.3mm, and the thickness of the cover-free colorful paint is 1-2 mm.

Compared with the prior art, the invention has the following beneficial effects:

(1) the invention can improve the application performance of the water-based multicolor paint, does not need to adopt a finish coat, simplifies the construction process and the construction procedure of the water-based multicolor paint construction, reduces the construction cost and improves the construction efficiency; simultaneously satisfies the high decoration and the use durability of the aqueous multicolor, in particular the color retention, the weather resistance, the anti-blooming property and the like. Under the construction of the water-based multicolor paint, the conventional water-based multicolor paint is a systematic combination and respectively consists of a water-based closed bottom, a water-based line paint, a multicolor matching middle coating, a water-based multicolor main material and a water-based finish varnish. The technical route of the system is to improve the performance of the water-based colorful main material to reduce the construction of water-based finish varnish, and to combine the water-based seal primer, the line paint and the matched primer base coat to reduce the use of various materials and the reduction of the process; the performance of the water-based stain-resistant weather-resistant multicolor paint without a finish coat system as a main material needs to be balanced with the performance given by the finish coat paint, and mainly reflects the performances of water resistance, stain resistance, self-cleaning property, color retention, anti-blooming property and the like.

(2) The emulsion for the continuous phase adopted in the invention is hydroxyl-containing modified polyacrylic acid PMMA grafted emulsion as a main material, the surface of the coating is hydrophilic to realize the self-cleaning performance and high stain resistance of the coating, and the self-carrying matte emulsion is used to ensure that the coating is not easy to bloom and increase the thick and heavy decoration feeling of the coating; the reasonable compatibility is carried out by adopting the inorganic graft modified acrylic emulsion with high resistance and high strength, the self-made modified bentonite and the colorful protection glue solution, so that the condition that the colored paint can be kept for a long time without gelling and hardening under the colorful protection wrapping state is met, and the excellent adhesive force of the colored paint is ensured.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.