CN106433359B - Stone-like exterior wall coating and preparation method thereof - Google Patents
Stone-like exterior wall coating and preparation method thereof Download PDFInfo
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- CN106433359B CN106433359B CN201510470207.XA CN201510470207A CN106433359B CN 106433359 B CN106433359 B CN 106433359B CN 201510470207 A CN201510470207 A CN 201510470207A CN 106433359 B CN106433359 B CN 106433359B
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Abstract
The invention discloses a rock color stone sheet-like stone-like coating which is thick in batch coating, high in adhesion, good in flexibility and elongation, good in water resistance, weather resistance, aging resistance and microorganism resistance, excellent in color retention performance and good in storage stability, and a preparation method thereof. The paint is prepared from the following components in percentage by weight: 26-38% of silicone-acrylic emulsion, 1-3% of polyvinyl acetate emulsion, 2-5% of polyurethane emulsion, 2.5-3.0% of lauryl ester, 1-2% of propylene glycol, 20-30% of deionized water, 0.5-2% of 1.5wt% of carboxymethyl chitosan acetic acid solution, 0.1-0.2% of trichloro-sym-diphenylurea, 0.05-0.1% of sulfuric acid polysaccharide, 0.1-0.15% of defoaming agent, 0.1-0.2% of pH regulator, 1-3% of thickening agent and 25-30% of rock slices.
Description
Technical Field
The invention relates to a coating, in particular to a rock color stone sheet-shaped stone-like coating and a preparation method thereof.
Background
The building coating has the functions of decoration, building protection and the like, can coat the surface of a substance, change the color, the pattern, the luster, the texture and the like of the substance, improve the aesthetic value of an object, protect the surface of the coated substance, prevent the corrosion of light, oxygen, chemical substances, solvents, microorganisms and the like from the outside and prolong the service life of the coated substance.
Along with the improvement of living standard, people have higher and higher requirements on the diversification of the coating, the stone-like coating is popular to people as a novel coating, the application of the stone-like coating is very wide, the decorative effect of the stone-like coating is comparable to that of stone, and the stone-like coating is more suitable for molding various artistic models than the stone. The stone-like coating can be used as the decoration of the special-shaped wall surfaces such as outer walls, reliefs, beams, columns and the like; the method is also suitable for being used as an outer wall mural; besides, the decorative plate can be used for indoor decoration, has granite, marble and granite-like color effects, and can be particularly used for indoor column, roman column and other decorations to achieve fake and true effects.
With the continuous maturity and popularization of the technology, the water-in-water multicolor paint is very popular at present. The water-in-water multicolor paint is developed from the conventional oil-in-water and water-in-oil paint bases. Compared with the traditional stone-like coating, the water-in-water multicolor coating has the advantages of one-time forming by single-gun spraying, simple and quick construction, greatly saved construction time and reduced cost. Although the water-in-water multicolor paint has a plurality of advantages, the water-in-water multicolor paint has a plurality of defects, which are mainly shown as follows:
firstly, the liquid dot-shaped color paint has poor fixity and is easy to break when being collided by hands and transported, and the dot-shaped color paint after construction can not meet the quality requirement.
Secondly, the coating is too thin, the water-in-water multicolor paint adopts emulsion base paint as color points for color mixing, has no flexibility and extensibility, has the thickness of only about 0.2 mm-0.3 mm and is not full-coverage, and the base surface of the building is easily impacted by external force or stress because the water-in-water multicolor paint has a thin coating. Cracking of the base surface is easy to occur, and the base surface is permeated by rainwater. The coating is firstly caused to bulge and then peel off.
Thirdly, the water resistance is poor, and the key raw material cementing material formed by the water-in-water colorful paint is a strong water-absorbing expansion type substance and has a large amount of water-soluble cellulose thickening agents, so that the water resistance function of the water-in-water colorful exterior wall paint is influenced.
Fourthly, the paint has poor weather resistance and color retention, and because the key raw material of the water-in-water multicolor paint is gelled into colored particles formed by a strong water-absorbing expansion type substance, the hardness and the density of a coating film are influenced. But also the weather and color retention of the coating film.
And fifthly, the storage stability is poor, the maturity and the stability of the whole system of the water-in-water multicolor paint are improved, especially the heat storage stability is improved, and the paint is easy to delaminate, agglomerate and deteriorate after being stored for a long time, so that the paint cannot be sprayed or the color of the sprayed paint is unclear.
Sixth, the water-in-water multicolor paint has poor antimicrobial capability, and due to the introduction of the aqueous medium, microorganisms are easy to breed no matter in the storage, transportation and use stages, so that the aesthetic feeling of the paint after application is destroyed, the material deterioration is easy to cause, and the service life is reduced.
Because of the problems associated with such water-in-water multicolor coatings, improvements are urgently needed to meet market demands.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a water-in-water multicolor paint which is a rock color stone sheet-like stone-like paint with thick batch coating layer, high adhesion, good flexibility and elongation, water resistance, weather resistance, aging resistance, good microbial resistance, excellent color retention performance and good storage stability and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
a rock color stone sheet stone-like coating is prepared from the following components in percentage by weight:
26 to 38 percent of silicone acrylic emulsion,
1 to 3 percent of polyvinyl acetate emulsion,
2 to 5 percent of polyurethane emulsion,
2.5 to 3.0 percent of decaglycol ester,
1 to 2 percent of propylene glycol,
20 to 30 percent of deionized water,
1.5wt% of carboxymethyl chitosan acetic acid solution 0.5-2%,
0.1 to 0.2 percent of trichloro-sym-diphenylurea,
0.05 to 0.1 percent of polysaccharide sulfate,
0.1 to 0.15 percent of defoaming agent,
0.1 to 0.2 percent of PH regulator,
1 to 3 percent of thickening agent,
25-30% of rock slices.
The invention is further configured to: the rock color stone flaky stone-like coating comprises the following components in percentage by weight:
26 to 32 percent of silicone-acrylic emulsion,
1 to 2 percent of polyvinyl acetate emulsion,
2 to 4 percent of polyurethane emulsion,
2.5 to 3.0 percent of decaglycol ester,
1 to 2 percent of propylene glycol,
20 to 30 percent of deionized water,
1.5wt% of carboxymethyl chitosan acetic acid solution 0.5-1.3%,
0.1 to 0.15 percent of trichloro-sym-diphenylurea,
0.05 to 0.08 percent of sulfuric acid polysaccharide
0.1 to 0.15 percent of defoaming agent,
0.1 to 0.2 percent of PH regulator,
1 to 3 percent of thickening agent,
25-30% of rock slices.
It will be appreciated that the sum of the percentages of the above components is 100%.
Preferably, the sulfated polysaccharide comprises one or more of hyaluronic acid, chondroitin sulfate and heparin sulfate, the thickening agent is a hydrophobic modified alkali-soluble synergistic thickening agent, and the pH regulator is a Dow AMP-95pH regulator.
Preferably, quartz sand accounting for 25 percent of the total mass of the components can be added into the components for increasing the transparency.
The invention provides a preparation method of the rock color stone sheet-shaped stone-like coating, which comprises the following steps: firstly, mixing the silicone-acrylic emulsion, the polyvinyl acetate emulsion, the polyurethane emulsion, the deionized water, the dodecyl glycol ester and the defoaming agent in a stirrer and stirring for 8-10 minutes at the rotating speed of 400-500 r/min; adjusting the rotating speed to 300-; regulating the rotation speed to 700-750 rpm, adding the thickening agent and the trichloro-sym-diphenylurea for 5-8 minutes, then adding the pH regulator to regulate the pH value to 7-8, stirring for 8-10 minutes, then adding the carboxymethyl chitosan acetic acid solution and the sulfuric acid polysaccharide, and stirring for 3-5 minutes; adjusting the rotating speed to 28-32 r/min, adding the rock slices, stirring for 8-10 minutes, and uniformly obtaining the stone-like exterior wall coating.
Compared with the prior art, the invention has the beneficial effects that:
1. the paint system of the invention adopts three kinds of emulsion coexisting, wherein the silicone-acrylic emulsion is a main component, which can provide the advantages of strong cohesiveness, good film forming property, good weather resistance, good aging resistance and the like, and meanwhile, the polyvinyl acetate emulsion and the polyurethane emulsion are added. The polyvinyl acetate emulsion is not usually used for exterior wall coatings, but the synergistic effect of adding a certain amount of the polyvinyl acetate emulsion and the silicone-acrylate emulsion into the system can provide enhanced bonding strength, elasticity and adhesiveness for the whole emulsion system, is beneficial to increasing the bonding strength, the fracture resistance and the water resistance of the whole coating system and a matrix, but because the heat resistance and the water resistance are general and the transparency is poor, the integral heat resistance and water resistance can be easily reduced by adding excessive amount, and the coloring of the coating system is not facilitated, and the complete retention of the weather resistance, the corrosion resistance, the aging resistance and the coloring property of the silicone-acrylate emulsion and the polyurethane emulsion can be realized by controlling the adding amount within the range. The invention adds a certain amount of polyurethane emulsion into the silicone-acrylate emulsion to achieve the cooperative synergistic effect, thereby improving the original general tensile strength and crack resistance of the silicone-acrylate emulsion, and overcoming the defect of poor film forming property of the polyurethane emulsion by controlling the adding amount. Through the matching use of the three emulsions, the water-based paint disclosed by the invention not only has good waterproof, weather-resistant and ageing-resistant performances, but also has good bonding strength, good crack resistance and surface adhesion;
2. the coating system of the invention adopts the matching use of trichloro-sym-diphenylurea, carboxymethyl chitosan acetic acid solution and sulfuric acid polysaccharide, thus achieving excellent antimicrobial performance. The existing water-based paint system is subjected to antibacterial treatment only by simply adding a common antibacterial agent, and the broad-spectrum antibacterial property, the antifungal effect and the antibacterial persistence are not very concerned. Because the environment of the exterior wall coating is severe, especially in a humid and rainy environment, microorganisms such as bacteria, fungi, mold and the like are easy to breed on the surface of the coating, which not only has great influence on the appearance, but also easily causes the quality reduction of the coating. The trichloro-sym-diphenylurea has the advantages of wide antibacterial spectrum, safe operation and storage, good stability, no unpleasant odor, no stimulation to eyes and skin, water resistance, capability of providing continuous antibacterial and deodorizing functions in high external humidity or rain and snow environments, and low water solubility, so that the content of the trichloro-sym-diphenylurea is controlled within a certain range, and the extensibility and the flexibility which are not beneficial to coatings are prevented from being excessively added. The carboxymethyl chitosan is nontoxic and odorless, contains free amino, can interfere negative charges on the surfaces of microbial cells, changes the fluidity and permeability of cell membranes, and causes the leakage of substances in cells, so the carboxymethyl chitosan has a wide antibacterial spectrum, has an antibacterial effect on bacteria, mould and yeast, but has strong water absorption, and in order to prevent the difference of weather-resistant, water-resistant and color-retention performances of a coating caused by water absorption, the preparation method simultaneously adds the sulfuric acid polysaccharide, and controls the excessive water absorption performance of the carboxymethyl chitosan by combining the negative charges of the sulfuric acid polysaccharide in the system with the positive charges carried on the surfaces of the carboxymethyl chitosan, so that the uniform dispersion and the film forming effect in final film forming are facilitated, and the carboxymethyl chitosan can be more stable through the combination, thereby continuously and permanently playing a role;
3. the coating system of the invention adopts the combination of the decaglycol ester and the propylene glycol, and effectively facilitates the film forming effect of the system and provides operation safety and storage stability by utilizing the characteristics of good resin compatibility, viscosity, low pollution, low-temperature storage property and improvement of the drying speed of a coating film.
Detailed Description
The components in the following examples are all commercially available conventional type products well known to those skilled in the art, if not specifically designated.
The first embodiment,
A rock color stone sheet stone-like coating is prepared from the following components in percentage by weight: 38% of silicone-acrylic emulsion, 1% of polyvinyl acetate emulsion, 3% of polyurethane emulsion, 2.9% of decaglycol ester, 1% of propylene glycol, 27.05% of deionized water, 0.5% of 1.5wt% of carboxymethyl chitosan acetic acid solution, 0.2% of trichloro-diphenyl urea, 0.05% of hyaluronic acid, 0.1% of defoaming agent, 0.2% of AMP-95, 1% of thickening agent and 25% of rock slices.
The preparation method comprises the following steps: firstly, mixing the silicone-acrylic emulsion, the polyvinyl acetate emulsion, the polyurethane emulsion, the deionized water, the glycol ester and the defoaming agent in a stirrer and stirring for 10 minutes at the rotating speed of 400 revolutions per minute; adjusting the rotating speed to 300 r/min, adding propylene glycol under stirring, and stirring for 8 minutes; regulating the rotating speed to 700 revolutions per minute, adding the thickening agent and the trichloro-sym-diphenylurea for 8 minutes, then adding the pH regulator to regulate the pH value to 7, stirring for 10 minutes, then adding the carboxymethyl chitosan acetic acid solution and the hyaluronic acid, and stirring for 3 minutes; and adjusting the rotating speed to 28 r/min, adding the rock slices, and stirring for 10 minutes to obtain the rock color stone slice stone-like coating.
Example II,
A rock color stone sheet stone-like coating is prepared from the following components in percentage by weight: 26% of silicone-acrylic emulsion, 3% of polyvinyl acetate emulsion, 5% of polyurethane emulsion, 3.0% of lauryl ester, 1.5% of propylene glycol, 27.1% of deionized water, 1.5% of carboxymethyl chitosan-acetic acid solution, 0.1% of trichloro-diphenyl urea, 0.1% of chondroitin sulfate, 0.1% of defoaming agent, 0.1% of AMP-95, 3% of thickening agent and 30% of rock slices.
The preparation method comprises the following steps: firstly, mixing the silicone-acrylic emulsion, the polyvinyl acetate emulsion, the polyurethane emulsion, the deionized water, the glycol ester and the defoaming agent in a stirrer and stirring for 8 minutes at the rotating speed of 500 revolutions per minute; adjusting the rotating speed to 400 r/min, adding propylene glycol under stirring, and stirring for 6 minutes; regulating the rotation speed to 750 revolutions per minute, adding a thickening agent and trichloro-sym-diphenylurea for 5 minutes, then adding a pH regulator to regulate the pH value to 8, stirring for 8 minutes, then adding a carboxymethyl chitosan acetic acid solution and chondroitin sulfate, and stirring for 5 minutes; and adjusting the rotating speed to 32 revolutions per minute, adding the rock slices, and stirring for 8 minutes to obtain the rock color stone slice stone-like coating.
Example III,
A rock color stone sheet stone-like coating is prepared from the following components in percentage by weight: 32% of silicone-acrylic emulsion, 2% of polyvinyl acetate emulsion, 2% of polyurethane emulsion, 3% of lauryl ester, 2% of propylene glycol, 30% of deionized water, 2% of 1.5wt% of carboxymethyl chitosan acetic acid solution, 0.2% of trichloro-sym-diphenylurea, 0.1% of heparin sulfate, 0.1% of defoaming agent, 0.1% of AMP-95, 1.5% of thickening agent and 25% of rock slices.
The preparation method comprises the following steps: firstly, mixing the silicone-acrylic emulsion, the polyvinyl acetate emulsion, the polyurethane emulsion, the deionized water, the glycol ester and the defoaming agent in a stirrer and stirring for 9 minutes at the rotating speed of 450 revolutions per minute; adjusting the rotating speed to 350 r/min, adding propylene glycol under stirring, and stirring for 7 minutes; regulating the rotating speed to 720 r/min, adding a thickening agent and trichloro-sym-diphenylurea for 6 minutes, then adding a pH regulator to regulate the pH value to 7, stirring for 9 minutes, then adding a carboxymethyl chitosan acetic acid solution and heparin sulfate, and stirring for 4 minutes; and adjusting the rotating speed to 30 revolutions per minute, adding the rock slices, stirring for 9 minutes, and uniformly obtaining the rock color stone slice stone-like coating.
Example four,
A rock color stone sheet stone-like coating is prepared from the following components in percentage by weight: 33.9 percent of silicone-acrylic emulsion, 3 percent of polyvinyl acetate emulsion, 3 percent of polyurethane emulsion, 2.5 percent of decaglycol ester, 2 percent of propylene glycol, 20 percent of deionized water, 2 percent of 1.5 percent of carboxymethyl chitosan acetic acid solution, 0.2 percent of trichloro-sym-diphenylurea, 0.1 percent of hyaluronic acid, 0.15 percent of defoaming agent, 0.15 percent of AMP-95, 3 percent of thickening agent and 30 percent of rock slices.
The preparation method comprises the following steps: firstly, mixing the silicone-acrylic emulsion, the polyvinyl acetate emulsion, the polyurethane emulsion, the deionized water, the glycol ester and the defoaming agent in a stirrer and stirring for 9 minutes at the rotating speed of 450 revolutions per minute; adjusting the rotating speed to 350 r/min, adding propylene glycol under stirring, and stirring for 7 minutes; regulating the rotating speed to 720 r/min, adding a thickening agent and trichloro-sym-diphenylurea for 6 minutes, then adding a pH regulator to regulate the pH value to 7, stirring for 9 minutes, then adding a carboxymethyl chitosan acetic acid solution and hyaluronic acid, and stirring for 4 minutes; and adjusting the rotating speed to 30 revolutions per minute, adding the rock slices, stirring for 9 minutes, and uniformly obtaining the rock color stone slice stone-like coating.
Tests show that the stone-like exterior wall coating obtained by the combination and preparation method of the invention has no hard blocks and is in a uniform state after being stirred; appearance of the coating film: no pinhole, no sagging and even film coating; drying time (tack-free): less than 1.5 h; water resistance: 1200h has no abnormality; alkali resistance: no abnormality in 240 h; temperature change resistance: no abnormality in 15 cycles; aging resistance (1200 h): powdering grade 1, changing color grade 1; brushing resistance: 12000 times or more; stain resistance: less than or equal to 10; elongation at break: is more than 350 percent; contrast ratio: not less than 0.96.
The antimicrobial property was tested as follows:
1. the products of the above examples 1 to 4 were prepared into film-forming samples, the surfaces of which were respectively and uniformly coated with escherichia coli, yeast, aspergillus niger and salmonella using a common building material without the above coating as a control group, and the samples were left at room temperature for 4 hours, and then the samples were sampled from the surfaces of the samples and cultured at 37 ℃ to observe the growth of the comparative bacteria, and the observation results were: more than 95% of the bacteria on the surface of the products of examples 1-4 were killed, while the control group grew well;
2. the product of the example 1 is used as a film forming sample 1, the product of the example 1 without three antibacterial components is used as a film forming sample as a control group 1, the product of the example 1 without trichlorocarbanilide is used as a film forming sample as a control group 2, the product of the example 1 without hyaluronic acid is used as a film forming sample as a control group 3, the cultured escherichia coli and aspergillus niger are respectively smeared on the surfaces of the samples washed by sterile water, the samples are placed under the conditions of sunshine, shade and high humidity (water vapor is introduced under a closed environment) in sunny days, the samples are respectively sampled at 37 ℃ for 2h, 12h and 24h for culturing, the growth condition of the comparative bacteria is observed, the bacteria count is carried out, and the count result is:
the construction mode of the coating system comprises the following steps: grading according to the color content and the dot size of the real granite provided by a user, spraying once during construction, and then returning to secondary batch scraping through a stainless steel batch. After drying, mechanically sanding to be smooth. The finished coating after construction has the same polished surface as that of real stone, and the stone simulation fidelity is 100 percent.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (3)
1. A stone-like exterior wall coating is characterized in that: the paint is prepared from the following components in percentage by weight: 26-38% of silicone-acrylic emulsion, 1-2% of polyvinyl acetate emulsion, 2-4% of polyurethane emulsion, 2.5-3.0% of decaglycol ester, 1-2% of propylene glycol, 20-30% of deionized water, 0.5-2% of 1.5wt% of carboxymethyl chitosan acetic acid solution, 0.1-0.2% of trichloro-sym-diphenylurea, 0.05-0.1% of sulfuric acid polysaccharide, 0.1-0.15% of defoaming agent, 0.1-0.2% of pH regulator, 1-3% of thickening agent and 25-30% of rock slice; the sulfated polysaccharide comprises one or more of hyaluronic acid, chondroitin sulfate and heparin sulfate.
2. The stone-like exterior wall coating of claim 1, wherein: the thickening agent is a hydrophobic modified alkali-soluble synergistic thickening agent, and the pH regulator is a Dow AMP-95pH regulator.
3. The stone-like exterior wall coating of claim 1, wherein: quartz sand accounting for 25 percent of the total mass of the components is added for increasing the transparency.
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| CN107674541A (en) * | 2017-09-20 | 2018-02-09 | 芜湖县双宝建材有限公司 | A kind of pure natural corrosion-resistant true mineral varnish |
| CN107762088A (en) * | 2017-11-01 | 2018-03-06 | 苏州普莱特环保新材料有限公司 | A kind of color bionical compound insulating material of rock and its production technology |
| CN108531027B (en) * | 2018-05-11 | 2020-06-23 | 广州市白云化工实业有限公司 | Sealing rubber primer coating liquid and preparation method and application thereof |
| CN109162417B (en) * | 2018-08-03 | 2021-01-15 | 吉安天晟新材料有限公司 | Method for manufacturing stone-like colorful coating |
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| CN104449169A (en) * | 2014-12-31 | 2015-03-25 | 韦良 | Preparation method of natural slice paint |
| CN104692707A (en) * | 2015-01-29 | 2015-06-10 | 三棵树涂料股份有限公司 | Functional real stone paint building exterior wall coating material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104449169A (en) * | 2014-12-31 | 2015-03-25 | 韦良 | Preparation method of natural slice paint |
| CN104692707A (en) * | 2015-01-29 | 2015-06-10 | 三棵树涂料股份有限公司 | Functional real stone paint building exterior wall coating material and preparation method thereof |
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