Art coating with stable pearlescent texture and preparation method thereof

Abstract

The invention relates to the technical field of coatings, in particular to an art coating with stable pearlescent texture and a preparation method thereof, the art coating comprises a basic art coating phase and a modified pearlescent pigment phase, the modified pearlescent pigment phase is composed of a modified pearlescent pigment inner core structure, a modified titanium dioxide skeleton supporting structure covering the outer side of the modified pearlescent pigment inner core structure and a colloid material for welding the modified titanium dioxide skeleton supporting structure into a shell structure, and the average particle size of the modified pearlescent pigment phase is 80-100 microns. The addition amount of the modified pearlescent pigment phase is 1-6wt% of the basic art paint phase. The artistic coating has the advantages of high hardness, good yin-yang surface effect, low VOC, good pearlescent flickering texture effect and the like, and has a wide application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to an artistic coating with a stable pearlescent texture and a preparation method thereof. Background Art

[0002] As the Chinese coatings market gradually matures, the profit margins of the traditional market are gradually compressed. The coatings industry is facing transformation pressure during its development difficulties and must explore new market blue oceans. The high profits of artistic coatings have given rise to the development of the industry. Its decorative effects are highly artistic and have awakened consumers' awareness of the aesthetics of coating products. Stimulated by consumer demand and the joint efforts of coatings companies to boost the market, the artistic coatings market is booming in an orderly manner. However, at the same time, due to the limitations of the professionalism of various companies in color design and matching, especially the professionalism of various companies and construction personnel, the market promotion and penetration rate of artistic coatings is still far from people's expectations. As one of the effect pigments, pearlescent pigments are generally used in artistic coatings with poor or unstable pearlescent texture.

[0003] To this end, the present invention provides an artistic coating with a stable pearlescent texture and a preparation method thereof. Summary of the invention

[0004] Based on this, it is necessary to provide an artistic coating with a stable pearlescent texture and a preparation method thereof in response to the above technical problems.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] According to a first aspect of the present invention, there is provided an artistic coating with a stable pearlescent texture, comprising a basic artistic coating phase and a modified pearlescent pigment phase, wherein the modified pearlescent pigment phase is composed of a modified pearlescent pigment core structure, a modified titanium dioxide skeleton support structure coated on the outside of the modified pearlescent pigment core structure, and a colloidal material that welds the modified titanium dioxide skeleton support structure into a shell structure, the average particle size of the modified pearlescent pigment phase is 80-100 μm, and the amount of the modified pearlescent pigment phase added is 1-6 wt % of the basic artistic coating phase.

[0007] In some optional implementations of some embodiments, the modified pearlescent pigment core structure includes a pearlescent pigment structure and a zirconium dioxide layer coated on the surface of the pearlescent pigment structure, and the pearlescent pigment structure includes one or more mixtures of natural mica-based pearlescent pigments, synthetic mica-based pearlescent pigments, silica-based pearlescent pigments and alumina-based pearlescent pigments.

[0008] In some optional implementations of some embodiments, the average particle size of the pearlescent pigment structure is 40-70 μm, and the thickness of the zirconium dioxide layer is 20-100 nm.

[0009] In some optional implementations of some embodiments, the modified titanium dioxide skeleton support structure is composited by 83-90wt% silicon dioxide, 5-16wt% triethanolamine, and 1-5wt% silane coupling agent, and the mass ratio of the modified titanium dioxide skeleton support structure to the modified pearlescent pigment core structure is (2-5): (0.5-1).

[0010] In some optional implementations of some embodiments, the colloidal material is composited by epoxy resin and amino resin in a mass ratio of (5-12):(1-3), and the mass ratio of the colloidal material to the modified titanium dioxide skeleton support structure is (6-15):(85-94).

[0011] In some optional implementations of some embodiments, the basic art paint phase includes the following raw materials in parts by weight: 15-50 parts of polysiloxane-modified water-based epoxy resin emulsion, 1-6 parts of dispersant, 0.5-1.5 parts of wetting agent, 0.1-0.8 parts of mildewproofing agent, 0.3-1 parts of pH adjuster, 0.1-0.5 parts of defoaming agent, 3-8 parts of film-forming aid, 0.5-2 parts of antifreeze agent and 10-15 parts of thickener, and the rest is water.

[0012] According to a second aspect of the present invention, a method for preparing an artistic coating with a stable pearlescent texture is provided, comprising the following steps: placing a pearlescent pigment structure in a fluidized bed under nitrogen conditions, adjusting the nitrogen introduction rate to place the pearlescent pigment structure in a suspended motion state, spraying zirconium dioxide into the fluidized bed through an atomizing nozzle, and continuing the reaction for 10-20 minutes to coat the surface of the pearlescent pigment structure with zirconium dioxide, thereby obtaining a modified pearlescent pigment inner core structure; placing triethanolamine and a silane coupling agent in a stirrer, stirring at 200-300 rpm for 5-10 minutes, adding boron trifluoride ether catalyst for coupling reaction, separating and purifying to obtain a silicon-containing triethanolamine solution, and then adding silicon dioxide to the silicon-containing triethanolamine solution, stirring at 400-600 rpm for 20-3 0min to obtain a silicon-containing triethanolamine modified titanium dioxide solution; the modified pearlescent pigment core structure, the silicon-containing triethanolamine modified titanium dioxide solution, and the colloidal material are placed in a blender for dispersion, and stirred at 200-300rpm for 30-60min to obtain a mixed solution, and the mixed solution is dried and granulated using a spray dryer to obtain a modified pearlescent pigment phase; polysiloxane-modified water-based epoxy resin emulsion, dispersant, wetting agent, mildewproof agent, bactericide, pH adjuster, defoamer, film-forming aid, antifreeze agent and water are placed in a blender, stirred at 350-500rpm for 8-10min, and then a thickener is added to obtain a basic art coating phase; the modified pearlescent pigment phase is added to the basic art coating phase, and stirred at 200-300rpm for 5-8min to obtain an art coating.

[0013] In some optional implementations of some embodiments, the nitrogen gas is introduced at a speed of 0.1-0.3 m / s.

[0014] In some optional implementations of some embodiments, the silane coupling agent is 3-aminopropyltriethoxysilane.

[0015] In some optional implementations of some embodiments, the inlet air temperature of the spray dryer is 120-150° C., and the feed rate is 15-25 mL / min.

[0016] The advantages and beneficial effects of the present invention are as follows: the artistic coating of the present invention is formed by mixing a basic artistic coating phase and a modified pearlescent pigment phase, wherein the modified pearlescent pigment phase is composed of a modified pearlescent pigment inner core structure, a modified titanium dioxide skeleton support structure coated on the outer side of the modified pearlescent pigment inner core structure, and a colloidal material that welds the modified titanium dioxide skeleton support structure into a shell structure; the modified pearlescent pigment inner core structure is modified by zirconium dioxide on the pearlescent pigment structure, and the two work together to effectively improve the gloss, brightness and saturation of the surface of the pearlescent pigment structure, thereby enabling the coating to obtain a more stable pearlescent effect; the modified titanium dioxide skeleton support structure is modified by silicon-containing triethanolamine on titanium dioxide, which can not only improve the dispersion performance of titanium dioxide in the coating mixed phase, but also cooperate with the welding effect of the colloidal material, and the amino resin can make the linear epoxy resin Chemical bonds are formed between molecules, so that linear epoxy resin molecules are interconnected to form a mesh structure, which is attached to the surface of the modified titanium dioxide skeleton support structure, which can effectively enhance the interaction between the modified titanium dioxide skeleton support structures, and make the modified titanium dioxide skeleton support structure "welded" into a shell structure, similar to an inorganic membrane, and the formed shell structure protects the modified pearlescent pigment core structure, thereby improving the service life of the modified pearlescent pigment core structure. At the same time, the synergistic effect between the modified titanium dioxide skeleton support structure and the modified pearlescent pigment core structure can facilitate the paint film after molding to obtain a stable and reliable pearlescent texture; and the colloidal material adopts amino resin and epoxy resin, which has good compatibility with the polysiloxane-modified water-based epoxy resin emulsion in the art coating, thereby further improving the dispersibility of the modified pearlescent pigment phase in the basic art coating phase. The art coating of the present invention has the advantages of high hardness, good positive and negative effects, low VOC, and good pearlescent glittering texture effect, and has broad application prospects. DETAILED DESCRIPTION

[0017] The present application provides an artistic coating with a stable pearlescent texture, the artistic coating comprising a basic artistic coating phase and a modified pearlescent pigment phase, wherein the modified pearlescent pigment phase is composed of a modified pearlescent pigment inner core structure, a modified titanium dioxide skeleton support structure coated on the outer side of the modified pearlescent pigment inner core structure, and a colloidal material that welds the modified titanium dioxide skeleton support structure into a shell structure, the average particle size of the modified pearlescent pigment phase is 80-100 μm, and the addition amount of the modified pearlescent pigment phase is 1-6 wt % of the basic artistic coating phase.

[0018] Preferably, the modified pearlescent pigment core structure includes a pearlescent pigment structure and a zirconium dioxide layer coated on the surface of the pearlescent pigment structure, and the pearlescent pigment structure includes one or more mixtures of natural mica-based pearlescent pigments, synthetic mica-based pearlescent pigments, silica-based pearlescent pigments and alumina-based pearlescent pigments.

[0019] Preferably, the average particle size of the pearlescent pigment structure is 40-70 μm, and the thickness of the zirconium dioxide layer is 20-100 nm.

[0020] Preferably, the modified titanium dioxide skeleton support structure is composited by 83-90wt% silicon dioxide, 5-16wt% triethanolamine, and 1-5wt% silane coupling agent, and the mass ratio of the modified titanium dioxide skeleton support structure to the modified pearlescent pigment core structure is (2-5): (0.5-1).

[0021] Preferably, the colloidal material is composited from epoxy resin and amino resin in a mass ratio of (5-12):(1-3), and the mass ratio of the colloidal material to the modified titanium dioxide skeleton support structure is (6-15):(85-94).

[0022] Preferably, the basic artistic coating phase includes the following raw materials in parts by weight: 15-50 parts of polysiloxane modified water-based epoxy resin emulsion, 1-6 parts of dispersant, 0.5-1.5 parts of wetting agent, 0.1-0.8 parts of mildewproofing agent, 0.3-1 parts of pH adjuster, 0.1-0.5 parts of defoaming agent, 3-8 parts of film-forming aid, 0.5-2 parts of antifreeze agent and 10-15 parts of thickener, and the rest is water.

[0023] Preferably, the dispersant is a sodium salt of polycarboxylate dispersant, the wetting agent is a fatty alcohol polyoxyethylene ether, the mildew inhibitor is autoclave, the pH adjuster is ammonia water, the defoamer is a polyether modified silicone defoamer, the film-forming aid is OE400, the antifreeze agent is FT-68, and the thickener is cellulose.

[0024] The present application also provides a method for preparing an artistic coating with a stable pearlescent texture, comprising the following steps: placing a pearlescent pigment structure in a fluidized bed under nitrogen conditions, adjusting the nitrogen introduction rate to place the pearlescent pigment structure in a suspended motion state, spraying zirconium dioxide into the fluidized bed through an atomizing nozzle, and continuing the reaction for 10-20 minutes to coat the surface of the pearlescent pigment structure with zirconium dioxide, thereby obtaining a modified pearlescent pigment inner core structure; placing triethanolamine and a silane coupling agent in a stirrer, stirring at 200-300 rpm for 5-10 minutes, adding a boron trifluoride ether catalyst for a coupling reaction, separating and purifying to obtain a silicon-containing triethanolamine solution, and then adding silicon dioxide to the silicon-containing triethanolamine solution, stirring at 400-600 rpm for 20-30 minutes. , obtain a silicon-containing triethanolamine modified titanium dioxide solution; place the modified pearlescent pigment core structure, the silicon-containing triethanolamine modified titanium dioxide solution, and the colloidal material in a blender for dispersion, stir at 200-300rpm for 30-60min to obtain a mixed solution, dry and granulate the mixed solution using a spray dryer to obtain a modified pearlescent pigment phase; place a polysiloxane-modified water-based epoxy resin emulsion, a dispersant, a wetting agent, a mildew preventer, a bactericide, a pH adjuster, a defoamer, a film-forming aid, an antifreeze agent, and water in a blender, stir at 350-500rpm for 8-10min, and then add a thickener to obtain a basic art coating phase; add the modified pearlescent pigment phase to the basic art coating phase, stir at 200-300rpm for 5-8min to obtain an art coating.

[0025] It should be noted that the raw materials of the artistic coatings involved in this application are all commercially available products.

[0026] The following is a clear and complete description of the various technical solutions of the present invention in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. The equivalent transformation or substitution of the methods, process routes, and functions made by those skilled in the art according to the following implementation methods all belong to the scope of protection of the present invention.

[0027] Example 1

[0028] An artistic coating with a stable pearlescent texture comprises a basic artistic coating phase and a modified pearlescent pigment phase, wherein the modified pearlescent pigment phase is composed of a modified pearlescent pigment inner core structure, a modified titanium dioxide skeleton support structure coated on the outer side of the modified pearlescent pigment inner core structure, and a colloidal material that welds the modified titanium dioxide skeleton support structure into a shell structure, the average particle size of the modified pearlescent pigment phase is 80-100 μm, and the added amount of the modified pearlescent pigment phase is 1wt% of the basic artistic coating phase.

[0029] In this embodiment, the modified pearlescent pigment core structure includes a pearlescent pigment structure and a zirconium dioxide layer coated on the surface of the pearlescent pigment structure, and the pearlescent pigment structure is a natural mica-based pearlescent pigment.

[0030] In this embodiment, the average particle size of the pearlescent pigment structure is 40-70 μm, and the thickness of the zirconium dioxide layer is 20 nm.

[0031] In this embodiment, the modified titanium dioxide skeleton support structure is composited by 83wt% silicon dioxide, 16wt% triethanolamine and 1wt% silane coupling agent, and the mass ratio of the modified titanium dioxide skeleton support structure to the modified pearlescent pigment core structure is 2:0.5.

[0032] In this embodiment, the colloidal material is composited by epoxy resin and amino resin in a mass ratio of 5:1, and the mass ratio of the colloidal material to the modified titanium dioxide skeleton support structure is 6:85.

[0033] In this embodiment, the basic artistic coating phase includes the following raw materials in parts by weight: 15 parts of polysiloxane-modified water-based epoxy resin emulsion, 1 part of dispersant, 0.5 part of wetting agent, 0.1 part of mildewproofing agent, 0.3 part of pH adjuster, 0.1 part of defoaming agent, 3 parts of film-forming aid, 0.5 part of antifreeze agent and 10 parts of thickener, and the rest is water.

[0034] In this embodiment, a method for preparing an artistic coating with a stable pearlescent texture comprises: placing a pearlescent pigment structure in a fluidized bed under nitrogen conditions, adjusting the nitrogen introduction rate to make the pearlescent pigment structure in a suspended motion state, spraying zirconium dioxide into the fluidized bed through an atomizing nozzle, and continuously reacting for 10-20 minutes to coat the surface of the pearlescent pigment structure with zirconium dioxide, thereby obtaining a modified pearlescent pigment core structure; placing triethanolamine and a silane coupling agent in a blender, stirring at 200-300 rpm for 5-10 minutes, adding a boron trifluoride ether catalyst for a coupling reaction, separating and purifying to obtain a silicon-containing triethanolamine solution, then adding silicon dioxide to the silicon-containing triethanolamine solution, and stirring at 400-600 rpm for 20-30 minutes, A silicon-containing triethanolamine-modified titanium dioxide solution is obtained; the modified pearlescent pigment core structure, the silicon-containing triethanolamine-modified titanium dioxide solution, and the colloidal material are dispersed in a blender, stirred at 200-300rpm for 30-60min to obtain a mixed solution, and the mixed solution is dried and granulated using a spray dryer to obtain a modified pearlescent pigment phase; polysiloxane-modified waterborne epoxy resin emulsion, dispersant, wetting agent, mildewproofing agent, bactericide, pH regulator, defoamer, film-forming aid, antifreeze agent and water are placed in a blender, stirred at 350-500rpm for 8-10min, and then a thickener is added to obtain a basic art coating phase; the modified pearlescent pigment phase is added to the basic art coating phase, stirred at 200-300rpm for 5-8min to obtain an art coating.

[0035] Example 2

[0036] The raw materials and preparation method of the art paint involved in this embodiment are the same as those in Example 1, except that the addition amount of the modified pearlescent pigment phase is 6wt% of the basic art paint phase, and the other components remain unchanged.

[0037] Example 3

[0038] The raw materials and preparation method of the artistic coating involved in this embodiment are the same as those in Example 1, except that the thickness of the zirconium dioxide layer is 100 nm, and the other components remain unchanged.

[0039] Example 4

[0040] The raw materials and preparation method of the artistic coating involved in this embodiment are the same as those in Example 1, except that the modified titanium dioxide skeleton support structure is composited by 90wt% silicon dioxide, 5wt% triethanolamine, and 5wt% silane coupling agent, and the other components remain unchanged.

[0041] Example 5

[0042] The raw materials and preparation method of the artistic coating involved in this embodiment are the same as those in Example 1, except that the mass ratio of the modified titanium dioxide skeleton support structure to the modified pearlescent pigment core structure is 5:1, and the other components remain unchanged.

[0043] Example 6

[0044] The raw materials and preparation method of the artistic coating involved in this embodiment are the same as those in Example 1, except that the colloid material is compounded by epoxy resin and amino resin in a mass ratio of 12:3, and the other components remain unchanged.

[0045] Example 7

[0046] The raw materials and preparation method of the artistic coating involved in this embodiment are the same as those in Example 1, except that the mass ratio of the colloidal material to the modified titanium dioxide skeleton support structure is 15:94, and the other components remain unchanged.

[0047] Example 8

[0048] The raw materials and preparation method of the artistic paint involved in this embodiment are the same as those in Example 1, except that: the basic artistic paint phase includes the following raw materials in parts by weight: 50 parts of polysiloxane-modified water-based epoxy resin emulsion, 6 parts of dispersant, 1.5 parts of wetting agent, 0.8 parts of mildewproofing agent, 1 part of pH adjuster, 0.5 parts of defoaming agent, 8 parts of film-forming aid, 2 parts of antifreeze agent and 15 parts of thickener, and the rest is water, and the other components remain unchanged.

[0049] Comparative Example 1

[0050] The raw materials and preparation method of the basic artistic coating phase involved in this comparative example are the same as those in Example 1, except that natural mica-based pearlescent pigment is directly used as the pearlescent pigment phase, and the other components remain unchanged.

[0051] Comparative Example 2

[0052] The raw materials and preparation method of the art paint involved in this comparative example are the same as those in Example 1, except that the addition amount of the modified pearlescent pigment phase is 0.8wt% of the basic art paint phase, and the other components remain unchanged.

[0053] Comparative Example 3

[0054] The raw materials and preparation method of the art paint involved in this comparative example are the same as those in Example 1, except that the addition amount of the modified pearlescent pigment phase is 6.5wt% of the basic art paint phase, and the other components remain unchanged.

[0055] Comparative Example 4

[0056] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that the modified titanium dioxide skeleton support structure is composited by 82wt% silicon dioxide, 17.5wt% triethanolamine, and 0.5wt% silane coupling agent, and the other components remain unchanged.

[0057] Comparative Example 5

[0058] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that the modified titanium dioxide skeleton support structure is composited by 77wt% silicon dioxide, 17wt% triethanolamine, and 6wt% silane coupling agent, and the other components remain unchanged.

[0059] Comparative Example 6

[0060] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that the mass ratio of the modified titanium dioxide skeleton support structure to the modified pearlescent pigment core structure is 1:0.2, and the other components remain unchanged.

[0061] Comparative Example 7

[0062] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that the mass ratio of the modified titanium dioxide skeleton support structure to the modified pearlescent pigment core structure is 6:1.5, and the other components remain unchanged.

[0063] Comparative Example 8

[0064] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that the colloid material is compounded by epoxy resin and amino resin in a mass ratio of 4:0.5, and the other components remain unchanged.

[0065] Comparative Example 9

[0066] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that the colloid material is compounded by epoxy resin and amino resin in a mass ratio of 13:4, and the other components remain unchanged.

[0067] Comparative Example 10

[0068] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that the mass ratio of the colloidal material to the modified titanium dioxide skeleton support structure is 5:84, and the other components remain unchanged.

[0069] Comparative Example 11

[0070] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that the mass ratio of the colloidal material to the modified titanium dioxide skeleton support structure is 16:95, and the other components remain unchanged.

[0071] Comparative Example 12

[0072] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that: the basic artistic coating phase includes the following raw materials in parts by weight: 14 parts of polysiloxane-modified water-based epoxy resin emulsion, 0.5 parts of dispersant, 0.3 parts of wetting agent, 0.05 parts of mildewproofing agent, 0.2 parts of pH adjuster, 0.05 parts of defoaming agent, 2 parts of film-forming aid, 0.4 parts of antifreeze agent and 8 parts of thickener, and the rest is water, and the other components remain unchanged.

[0073] Comparative Example 13

[0074] The raw materials and preparation method of the artistic coating involved in this comparative example are the same as those in Example 1, except that: the basic artistic coating phase includes the following raw materials in parts by weight: 51 parts of polysiloxane-modified water-based epoxy resin emulsion, 7 parts of dispersant, 2 parts of wetting agent, 1 part of mildewproofing agent, 1.5 parts of pH adjuster, 0.8 parts of defoaming agent, 9 parts of film-forming aid, 2.5 parts of antifreeze agent and 16 parts of thickener, and the rest is water, and the other components remain unchanged.

[0075] Performance evaluation: The artistic coatings of Examples 1-8 and Comparative Examples 1-13 were subjected to performance tests, and the evaluation methods included hardness: pencil hardness, refer to GB / T6739-2006; positive and negative sides: the intensity of the expression of different gloss differences, visual inspection, with a full score of 10 points; free formaldehyde: GB 18582-2020, requiring a free formaldehyde limit of ≤100 mg / kg; VOC: GB 18582-2020, requiring VOC≤120 g / L; coating appearance: visual inspection, the test results are shown in Table 1.

[0076] Table 1 Performance test comparison table of Examples 1-8 and Comparative Examples 1-13

[0077]

[0078]

[0079]

[0080] It can be seen from Table 1 that after the construction of the artistic paints of Examples 1-8, they have the advantages of higher hardness, better positive and negative surface effects, lower VOC, and better pearlescent texture effects, and have broad application prospects.

[0081] The present application further conducted chemical resistance tests on Example 1, wherein gasoline resistance: GB / T9274-88 Method A, requiring immersion in 95# gasoline at room temperature; wet heat test: GB / T 1740-2007, requiring that the coating should not be damaged, the temperature is 47°C, the humidity is 96%, and the time is 1000h; acid resistance test: after immersion in a sulfuric acid solution with a molar concentration of 0.05mol for 24h, the gloss of the coating is detected, and the gloss retention rate is calculated (gloss retention rate = gloss of the coating after the acid resistance test is completed / gloss of the coating before the acid resistance test is performed); alkali resistance test: after immersion in a NaOH solution with a molar concentration of 0.1mol for 24h, the gloss of the coating is detected, and the gloss retention rate is calculated (gloss retention rate = gloss of the coating after the alkali resistance test is completed / gloss of the coating before the alkali resistance test is performed). The test results are shown in Table 2.

[0082] Table 2 Chemical resistance test results of Example 1

[0083] serial number Gasoline resistance Wet heat test Acid resistance test Alkali resistance test Example 1 No change in coating No blistering and corrosion on the coating surface Gloss retention rate = 100% Gloss retention rate = 100%

[0084] It can be seen from Table 2 that after the artistic coating of Example 1 is applied, it can still have a relatively stable pearlescent effect after chemical resistance testing.

[0085] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. An artistic coating with a stable pearlescent texture, characterized in that: It includes a basic art coating phase and a modified pearlescent pigment phase, wherein the modified pearlescent pigment phase is composed of a modified pearlescent pigment inner core structure, a modified titanium dioxide skeleton support structure coated on the outer side of the modified pearlescent pigment inner core structure, and a colloidal material that welds the modified titanium dioxide skeleton support structure into a shell structure. The average particle size of the modified pearlescent pigment phase is 80-100 μm, and the added amount of the modified pearlescent pigment phase is 1-6wt% of the basic art coating phase.

2. The artistic paint with stable pearlescent texture according to claim 1, characterized in that: The modified pearlescent pigment inner core structure comprises a pearlescent pigment structure and a zirconium dioxide layer coated on the surface of the pearlescent pigment structure. The pearlescent pigment structure comprises a mixture of one or more of natural mica-based pearlescent pigments, synthetic mica-based pearlescent pigments, silica-based pearlescent pigments and alumina-based pearlescent pigments.

3. The artistic paint with stable pearlescent texture according to claim 2, characterized in that: The average particle size of the pearlescent pigment structure is 40-70 μm, and the thickness of the zirconium dioxide layer is 20-100 nm.

4. According to the artistic coating with stable pearlescent texture as described in claim 1, the modified titanium dioxide skeleton support structure is composited by 83-90wt% of silicon dioxide, 5-16wt% of triethanolamine, and 1-5wt% of silane coupling agent, and the mass ratio of the modified titanium dioxide skeleton support structure to the modified pearlescent pigment core structure is (2-5): (0.5-1).

5. According to the artistic paint with stable pearlescent texture as described in claim 1, the colloidal material is composited by epoxy resin and amino resin in a mass ratio of (5-12): (1-3), and the mass ratio of the colloidal material to the modified titanium dioxide skeleton support structure is (6-15): (85-94).

6. The artistic paint with a stable pearlescent texture according to claim 1, wherein the basic artistic paint phase comprises the following raw materials in parts by weight: 15-50 parts of polysiloxane-modified waterborne epoxy resin emulsion, 1-6 parts of dispersant, 0.5-1.5 parts of wetting agent, 0.1-0.8 parts of mildewproofing agent, 0.3-1 parts of pH adjusting agent, 0.1-0.5 parts of defoaming agent, 3-8 parts of film-forming aid, 0.5-2 parts of antifreeze agent and 10-15 parts of thickener, and the rest is water.

7. A method for preparing an artistic coating with a stable pearlescent texture according to any one of claims 1 to 6, characterized in that: The following steps are involved: Under nitrogen conditions, the pearlescent pigment structure is placed in a fluidized bed, the introduction rate of nitrogen is adjusted to make the pearlescent pigment structure in a suspended motion state, zirconium dioxide is sprayed into the fluidized bed through an atomizing nozzle, and the reaction is continued for 10-20 minutes to coat the surface of the pearlescent pigment structure with zirconium dioxide, thereby obtaining a modified pearlescent pigment core structure; The triethanolamine and silane coupling agent are placed in a stirrer, stirred at 200-300 rpm for 5-10 min, and then a boron trifluoride ether catalyst is added to carry out a coupling reaction, and a silicon-containing triethanolamine solution is obtained after separation and purification, and then silicon dioxide is added to the silicon-containing triethanolamine solution, and stirred at 400-600 rpm for 20-30 min to obtain a silicon-containing triethanolamine modified titanium dioxide solution; The modified pearlescent pigment core structure, the silicon-containing triethanolamine-modified titanium dioxide solution, and the colloidal material are dispersed in a stirrer, stirred at 200-300 rpm for 30-60 min to obtain a mixed solution, and the mixed solution is dried and granulated using a spray dryer to obtain a modified pearlescent pigment phase; Put polysiloxane modified waterborne epoxy resin emulsion, dispersant, wetting agent, mildewproof agent, bactericide, pH adjuster, defoamer, film-forming aid, antifreeze agent and water in a mixer, stir at 350-500 rpm for 8-10 min, and then add thickener to obtain a basic art coating phase; The modified pearlescent pigment phase is added into the basic art coating phase, and stirred at 200-300 rpm for 5-8 minutes to obtain the art coating.

8. The method for preparing an artistic coating with a stable pearlescent texture according to claim 6, characterized in that: The nitrogen gas is introduced at a speed of 0.1-0.3 m / s.

9. The method for preparing an artistic coating with a stable pearlescent texture according to claim 6, characterized in that: The silane coupling agent is 3-aminopropyltriethoxysilane.

10. The method for preparing an artistic coating with a stable pearlescent texture according to claim 6, characterized in that: The inlet air temperature of the spray dryer is 120-150°C, and the feed rate is 15-25 mL / min.

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