High-gloss mirror-finish stone-like multi-color paint and preparation method thereof

Abstract

The application belongs to the technical field of building coating, and particularly discloses a high-light mirror surface stone-imitating multi-color coating and a manufacturing method thereof. The high-light mirror surface stone-imitating multi-color coating comprises a hydrophobic modified acrylic acid ammonium salt polymer, a high-light silicone acrylic emulsion, magnesium lithium silicate, cellulose, and an auxiliary agent, etc. The hydrophobic modified acrylic acid ammonium salt polymer is obtained by copolymerization of acrylic ester and acrylic acid ammonium salt, and has excellent hydrophobic effect; the magnesium lithium silicate and cellulose have a synergistic effect, so that the finished product has excellent toughness while the color points are in the form of flakes. Compared with the prior art, the coating has improved gloss, flatness and water resistance, and excellent mirror surface stone-imitating effect is obtained.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of architectural coatings, and particularly relates to a high-light mirror surface stone-imitating multi-color coating and a manufacturing method thereof. BACKGROUND

[0002] With the development of the building decoration industry, people's requirements for the decorative properties of wall surfaces are becoming higher and higher. As a common natural building material, natural stone is widely used for building outdoor facings, but natural stone is expensive and heavy in weight, and has a high risk coefficient when used as a facing on building exterior walls, so it is not recommended to be used for dry hanging or large-area use on high-rise building exterior walls. Therefore, in order to achieve the decorative effect of natural stone on buildings, stone-imitating architectural coatings have been successively put on the market, from the earliest texture paint to real stone paint, and then to the multi-color paint that has been popular in the last decade, and the stone-imitating effect has gradually improved. However, the stone-imitating multi-color coatings on the market at present mainly focus on the simulation of stone patterns and colors, but ignore the simulation of stone gloss and flatness, especially mirror surface stone, which requires a high-light gloss of no less than 75°, and the gloss of most mirror surface granite slabs needs to reach 80-90° to have a good mirror surface gloss. The conventional stone-imitating multi-color coatings that are popular on the market have the following problems: (1) low gloss, thick color dots, poor flatness, and general leveling property; and (2) general weather resistance and poor color retention compared with stone.

[0003] The prior art, for example: CN202011418412.9 - A water-in-sand multi-color coating with high stability and a preparation method thereof, discloses a coating preparation method in which hydroxyethyl cellulose is combined with inorganic modified magnesium lithium silicate, which still has the above-mentioned drawbacks.

[0004] In view of the above, there is an urgent need to provide a new technical solution on the basis of the prior art to solve the above-mentioned problems in the existing stone-imitating coatings. SUMMARY

[0005] The present application aims to solve the above-mentioned defects, and provides a high-light mirror surface stone-imitating multi-color coating and a preparation method thereof. By introducing a hydrophobically modified ammonium salt acrylate polymer as the main component of the dispersed phase, and compounding it with magnesium lithium silicate, high-light silicon-acrylic emulsion, and additives, the gloss, flatness, and water resistance of the coating are effectively improved, and the simulation degree of mirror surface stone can reach 100%.

[0006] One object of the present application is to provide a high-light mirror surface stone-imitating multi-color coating, which comprises the following components in mass fractions:

[0007] Isolation liquid 15-20 parts

[0008] Coated glaze 50-65 parts

[0009] Dispersed phase 20-30 parts

[0010] wherein the dispersed phase comprises a hydrophobically modified ammonium acrylate polymer;

[0011] The hydrophobically modified ammonium acrylate polymer is obtained by copolymerizing acrylate and ammonium acrylate;

[0012] The dispersed phase also includes medium viscosity cellulose, low viscosity cellulose, lithium magnesium silicate, silicone acrylic emulsion, titanium dioxide, barium sulfate, and color paste;

[0013] Furthermore, the isolation liquid includes lithium magnesium silicate and water.

[0014] Furthermore, the coating glaze includes one or more of silicone acrylic emulsion, alcohol ester, ethylene glycol, and additives.

[0015] Furthermore, the high-gloss mirror-finish stone-like multi-color paint also includes a color paste; the color paste is selected from one or more of iron red, iron yellow, and carbon black.

[0016] Preferably, the titanium dioxide is Al2O3 and trimethylolpropane coated rutile titanium dioxide, such as BLR699 titanium dioxide.

[0017] Preferably, the high-gloss barium sulfate is Guangyuan Chemical's 1250-mesh ultrafine nano-barium sulfate.

[0018] Preferably, the silicone acrylic high gloss emulsion is an anionic multi-colored dispersed phase emulsion, such as Shin Kong XG-2765 and Showa AP4765.

[0019] Preferably, the lithium magnesium silicate is lithium magnesium silicate modified by one or any combination of cetyltrimethylammonium bromide, cetyltrimethylammonium chloride, dodecyltrimethylammonium bromide, and dodecyltrimethylammonium chloride, such as GRAS GV, GRAS JV, and Hemmings TMS.

[0020] Preferably, the mineral oil defoamer is NXZ defoamer from Nopco.

[0021] Preferably, the fungicide is a fungicide containing 2-methyl-4-isothiazoline-3-one or 1,2-benzisothiazolin-3-one, such as Sol MBS5050.

[0022] Preferably, the ethylene glycol is a high-quality ethylene glycol with a purity of ≥99.8%, such as the ethylene glycol produced by Yangzi Petrochemical.

[0023] Preferably, the dodecanol ester is a high-quality dodecanol ester with a purity of ≥99.8%, such as the dodecanol ester produced by Runtai.

[0024] Preferably, the organic amine is isobutanolamine, such as Dow's AMP95.

[0025] Preferably, the high-gloss silicone acrylic emulsion is an anionic multi-colored continuous phase emulsion, which is characterized by high gloss and excellent weather resistance, such as BATF RS996AD and BATF RS3788A.

[0026] Preferably, the thickener is a HASE-type emulsion thickener, which has no effect on gloss, such as Wanhua A401 thickener.

[0027] Preferably, the medium-viscosity cellulose is a cellulose having a molar substitution degree ≥ 2 and a 1 wt % aqueous solution viscosity of 1500-2500 cps at 25° C., such as Ashland 250HBR and Silver Eagle BR30000H.

[0028] Preferably, the low-viscosity cellulose is a hydrophobically modified hydroxyethyl cellulose (HMHEC) having a 1 wt % aqueous solution viscosity of 150-500 cps at 25° C., such as Ashland PLUS330.

[0029] Another object of the present invention is to provide a method for preparing the above-mentioned high-gloss mirror-like stone-imitation multi-color paint, wherein the method for preparing the high-gloss mirror-like stone-imitation multi-color paint comprises the following steps:

[0030] S1. Preparing a hydrophobically modified ammonium acrylate polymer: Under an inert environment, heating an acrylic acid ester and an ammonium acrylate in toluene under reflux in the presence of an initiator, and removing the toluene to obtain the hydrophobically modified ammonium acrylate polymer;

[0031] S2, preparing the spacer liquid, the coating glaze and the dispersed phase: uniformly mixing the raw materials to prepare the spacer liquid, the coating glaze and the dispersed phase respectively;

[0032] S3, preparing the finished product of the high-gloss mirror-finished stone-like multi-color paint: blending the isolation liquid, the coating glaze, the dispersed phase and the color paste to obtain the high-gloss mirror-finished stone-like multi-color paint.

[0033] Furthermore, the acrylate is selected from one or more of lauryl acrylate, tetradecyl acrylate, hexadecyl acrylate, and octadecyl acrylate.

[0034] Furthermore, the molar ratio of the acrylic acid ester to the acrylic acid ammonium salt is 1:1-3:1.

[0035] Furthermore, the heating temperature is 90-100°C.

[0036] The present invention has the following beneficial effects:

[0037] 1. The present invention uses octadecyl acrylate and ammonium acrylate as raw materials to prepare a hydrophobically modified ammonium acrylate polymer as a component. The polymer molecules contain a large number of hydrophilic amino groups and hydrophobic long alkyl chain segments, have good interfacial activity, can effectively reduce surface tension, and enhance the stability of the coating system; at the same time, the polymer can adsorb filler and pigment particles, reduce the agglomeration between particles, make the components more stably suspended and distributed in the solution system, avoid the occurrence of stratification and precipitation, further ensure the stability of the product during storage and use, and make it have more uniform and stable color and gloss.

[0038] 2. The present invention also uses medium- and low-viscosity cellulose, lithium magnesium silicate, and a high-gloss silicone-acrylic emulsion to form a dispersed phase. The lithium magnesium silicate and cellulose have good emulsifying and thickening effects on the silicone-acrylic emulsion. The active groups in their structures can also combine and cross-link with organic particles through intermolecular forces or chemical bonding, promoting the improvement of mechanical properties. At the same time, the hydrophobically modified ammonium acrylate polymer in the dispersed phase has good compatibility with the silicone-acrylic emulsion, further promoting the stability of the system. Under the synergistic effect of multiple components, the latex particles can be more evenly and stably distributed, improving the leveling of the product, and can form a paint film with higher gloss and smoother gloss. It is also beneficial to enhance the adhesion, strength, and weather resistance of the film structure. The finished product prepared by the present invention not only has flaky color spots, but also has excellent toughness, gloss, and scrub resistance. The conventional performance far exceeds the performance standards required by HG / T4343-2012, with a scrub resistance of more than 10,000 times and a weather resistance of more than 1,500 hours.

[0039] 3. The present invention uses a high-gloss silicone acrylic emulsion as the dispersed phase and the component of the coating glaze, with its content reaching more than 60%. The product has a strong crack covering ability, good water and alkali resistance, and excellent weather resistance. In addition, the present invention adjusts the thixotropic properties of the base paint color points to make the color points thin and tough, and the finished product has high gloss. By adjusting the ratio, the product gloss can be changed between 80-90 degrees. DETAILED DESCRIPTION

[0040] The present invention is described in detail below with reference to the examples to facilitate understanding of the present invention by those skilled in the art. It is necessary to point out that the examples are only used to further illustrate the present invention and are not to be construed as limiting the scope of protection of the present invention. Non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above-mentioned invention should still fall within the scope of protection of the present invention. At the same time, the raw materials mentioned below that are not described in detail are all commercially available products; the process steps or preparation methods that are not mentioned in detail are all process steps or preparation methods known to those skilled in the art.

[0041] In this example, unless otherwise specified, all preparations and tests were performed at 25° C. The following ingredients were used in the examples and have the functions indicated.

[0042] In the embodiment of the present invention,

[0043] Lithium magnesium silicate is selected from GRAS GV modified lithium magnesium silicate;

[0044] The dodecanol ester is selected from RTC-12 dodecanol ester produced by Runtai;

[0045] Ethylene glycol is selected from a 99.8 wt% ethylene glycol aqueous solution produced by Yangzi Petrochemical;

[0046] The fungicide is selected from Sol MBS5050;

[0047] The organic amine is selected from Dow AMP95 isobutanolamine;

[0048] High gloss silicone acrylic emulsion is selected from Xinguang XG-2765;

[0049] The thickener is selected from Wanhua A401;

[0050] The mineral oil defoamer is selected from Nopco NXZ mineral oil defoamer;

[0051] The medium viscosity cellulose is selected from Ashland 250HBR, and the viscosity of 1% aqueous solution is 1500-2500cps at 25°C;

[0052] The low-viscosity cellulose is selected from Ashland PLUS330, with a 1% aqueous solution viscosity of 150-500 cps at 25°C;

[0053] The hydrophobically modified ammonium acrylate polymer was prepared from octadecyl acrylate and 2-ammonium acrylate by emulsion polymerization.

[0054] Titanium dioxide is selected from BLR699 trimethylolpropane coated rutile titanium dioxide;

[0055] Barium sulfate is selected from Guangyuan Chemical's 1250 mesh ultrafine nano barium sulfate;

[0056] Iron red, iron yellow and carbon black pastes are selected from Kedi R4102 iron red, Y2042 iron yellow and BK9007-SD carbon black paste;

[0057] The water conductivity in all examples was ≤50 μs / cm;

[0058] The “parts” in the embodiments of the present invention are all parts by mass.

[0059] Example 1

[0060] A high-gloss mirror-finish stone-imitation multi-color paint, comprising the following components in parts by mass:

[0061]

[0062] in,

[0063] The isolation fluid comprises:

[0064] 4 parts of lithium magnesium silicate

[0065] 96 parts water;

[0066] The coating glaze comprises:

[0067]

[0068] The dispersed phase comprises:

[0069]

[0070] The color paste includes:

[0071] 0.5 parts of iron red

[0072] 0.5 parts iron yellow

[0073] 1 part carbon black;

[0074] The method for preparing the high-gloss mirror-like stone-like multi-color paint comprises the following steps:

[0075] S1. Preparation of hydrophobically modified ammonium acrylate polymer:

[0076] Add an appropriate amount of toluene into a reaction kettle, and then add octadecyl acrylate and 2-acrylic acid ammonium salt (n:n=1:1) in sequence and mix evenly. Heat to 95° C. and stir under a nitrogen atmosphere. Add an initiator dose of ammonium persulfate and heat under reflux for 1 hour. Cool the resulting solution to 50° C., add 15 wt % ammonia water dropwise to adjust the pH to 7, and remove the toluene by distillation under reduced pressure to obtain the hydrophobically modified acrylic acid ammonium salt polymer.

[0077] S2. Preparation of spacer liquid, coating glaze and dispersed phase:

[0078] Mix water and lithium magnesium silicate in the above-mentioned parts by mass, stir and disperse at 1000 r / min for 1 hour, and then let it stand for 24 hours to prepare an isolation liquid;

[0079] According to the above mass parts, water, dodecyl alcohol ester, ethylene glycol, and fungicide are mixed in sequence, stirred at 300 r / min for 5 minutes, and then organic amine and high-gloss silicone acrylic emulsion are added, stirred at 300 r / min for 5 minutes, and then thickener and mineral oil defoamer are added in sequence, and stirred at 1000 r / min for 10 minutes until the solution is uniform and smooth, thereby preparing a coated glaze;

[0080] According to the above mass parts, water, medium viscosity cellulose, low viscosity cellulose, the hydrophobically modified acrylic acid ammonium salt polymer, ethylene glycol, dodecyl alcohol ester, titanium dioxide, barium sulfate, organic amine, and sodium dodecylbenzene sulfonate are mixed in sequence, and stirred at 300 r / min until the surface of the solution is smooth. High-gloss silicone acrylic emulsion, lithium magnesium silicate, and fungicide are added in sequence, and stirred at 1000 r / min for 10 minutes to prepare a dispersed phase;

[0081] S3, preparing the finished product of the high-gloss mirror-like stone-like multi-colored paint:

[0082] According to the above-mentioned mass fractions and based on the mirror stone standard sample (G654 Zhangqiu black stone), iron red, iron yellow and carbon black slurries are added to the dispersed phase to obtain a single color; then the single color is added to the isolation liquid, and after pre-cutting, it is stirred at 500r / min for 5 minutes to form a mixed liquid; according to the above-mentioned mass fractions, the coated glaze is taken and added to the mixed liquid, and stirred at a low speed of 20r / min for 5 minutes to obtain the high-gloss mirror-like stone-like colorful coating.

[0083] Example 2

[0084] A high-gloss mirror-finish stone-imitation multi-color paint, comprising the following components in parts by mass:

[0085]

[0086] in,

[0087] The isolation fluid comprises:

[0088] 6 parts of lithium magnesium silicate

[0089] 94 parts water;

[0090] The coating glaze comprises:

[0091]

[0092]

[0093] The dispersed phase comprises:

[0094]

[0095] The color paste includes:

[0096] 0.6 parts of iron red

[0097] 0.2 parts iron yellow

[0098] 1.2 parts of carbon black;

[0099] The preparation method of the high-gloss mirror-like stone-like multi-color paint is the same as that of Example 1, except that the types and mass fractions of the raw materials are changed according to the above composition.

[0100] Example 3

[0101] A high-gloss mirror-finish stone-imitation multi-color paint, comprising the following components in parts by mass:

[0102]

[0103]

[0104] in,

[0105] The isolation fluid comprises:

[0106] 7 parts of lithium magnesium silicate

[0107] 93 parts water;

[0108] The coating glaze comprises:

[0109]

[0110] The dispersed phase comprises:

[0111]

[0112] The color paste includes:

[0113] 0.5 parts of iron red

[0114] 0.5 parts iron yellow

[0115] 1 part carbon black;

[0116] The preparation method of the high-gloss mirror-like stone-like multi-color paint is the same as that of Example 1, except that the types and mass fractions of the raw materials are changed according to the above composition.

[0117] Comparative Example 1

[0118] The raw materials and preparation method used in Comparative Example 1 are the same as those in Example 1, except that the hydrophobically modified ammonium acrylate polymer is not added in Comparative Example 1, but an equal amount of ammonium acrylate polymer is used instead.

[0119] The ammonium acrylate polymer is selected from Yunfu Haixing Environmental Protection PAA-NH4.

[0120] Comparative Example 2

[0121] The raw materials and preparation method used in Comparative Example 2 are the same as those in Example 2, with the only difference being that lithium magnesium silicate is not added in Comparative Example 2, but kaolin is used in an equal mass fraction instead.

[0122] The kaolin is selected from Dongguan Jinxin Powder Technology 1250 mesh kaolin.

[0123] Test Case

[0124] The high-gloss mirror-like stone-like multi-color paint samples prepared in Examples 1-3 and Comparative Examples 1-2 were tested for key physical and chemical properties according to standards such as "HG / T4343-2012 Water-based Multi-color Architectural Paints". The results are shown in Table 1.

[0125] Table 1 Comparison of performance test results of Examples 1-3 and Comparative Examples 1-2

[0126]

[0127]

[0128] As shown in Table 1, the test results of Examples 1-3 and Comparative Examples 1-2 all met the requirements, but the key properties of Examples 1-3, such as gloss, water resistance, and scrub resistance, were significantly superior to those of Comparative Examples 1-2. The test results indicate that the hydrophobically modified ammonium acrylate polymer, cellulose, lithium magnesium silicate, and high-gloss silicone acrylic emulsion produce a synergistic effect that improves the overall performance of the coating.

[0129] The technical content disclosed in this invention can be significantly extended. By simple replacement and deduction, other similar products can be generated, such as mid-coat paint, separator paint, etc., but these do not deviate from the concept of the present invention and do not constitute creative work. Therefore, based on the disclosure of this invention, simple improvements and evolutions made by those skilled in the art to the present invention should be within the scope of protection of this invention. The above embodiments are preferred embodiments of the present invention, and all processes similar to the present invention and equivalent changes made should fall within the scope of protection of this invention.

Claims

1. A high-gloss mirror-like stone-like multi-color paint, characterized in that: The high-gloss mirror-like stone-like multi-color paint comprises the following components in parts by mass: 15-20 parts of isolation fluid Coating glaze 50-65 parts 20-30 parts of dispersed phase; wherein the dispersed phase comprises a hydrophobically modified ammonium acrylate polymer; The hydrophobically modified ammonium acrylate polymer is obtained by copolymerizing acrylate and ammonium acrylate; The dispersed phase also includes medium viscosity cellulose, low viscosity cellulose, lithium magnesium silicate, silicone acrylic emulsion, titanium dioxide, and barium sulfate; The medium-viscosity cellulose is a cellulose having a 1 wt% aqueous solution viscosity of 1500-2500 cps at 25°C; The low-viscosity cellulose is a hydrophobically modified hydroxyethyl cellulose having a 1 wt% aqueous solution viscosity of 150-500 cps at 25°C; The isolation fluid includes lithium magnesium silicate and water; The coating glaze includes silicone acrylic emulsion, alcohol ester, ethylene glycol and additives; wherein the molar ratio of acrylate to ammonium acrylate is 1:1-3:1; The acrylate is selected from one or more of lauryl acrylate, tetradecyl acrylate, hexadecyl acrylate, and octadecyl acrylate.

2. The high-gloss mirror-like stone-like multi-color paint according to claim 1, characterized in that: The high-gloss mirror-like stone-like multi-color paint further includes a color paste; the color paste is selected from one or more of iron red paste, iron yellow paste, and carbon black paste.

3. The method for preparing the high-gloss mirror-like stone-like multi-color coating according to any one of claims 1 to 2, wherein: The preparation method of the high-gloss mirror-like stone-like multi-color paint comprises the following steps: S1. Preparing a hydrophobically modified ammonium acrylate polymer: Under an inert environment, heating an acrylic acid ester and an ammonium acrylate in toluene under reflux in the presence of an initiator, and removing the toluene to obtain the hydrophobically modified ammonium acrylate polymer; S2, preparing the spacer liquid, the coating glaze and the dispersed phase: uniformly mixing the raw materials to prepare the spacer liquid, the coating glaze and the dispersed phase respectively; S3, preparing the finished product of the high-gloss mirror-finished stone-like multi-color paint: blending the isolation liquid, the coating glaze, the dispersed phase and the color paste to obtain the high-gloss mirror-finished stone-like multi-color paint.

4. The method for preparing the high-gloss mirror-surface stone-imitation multi-color paint according to claim 3, characterized in that: The heating temperature is 90-100°C.

Images