A water-based glass spraying ink, a preparation method and application thereof

Abstract

The application discloses a kind of water-based glass spraying ink and its preparation method and application, water-based glass spraying ink includes primer and finish;Primer includes: 5~10 parts water-based hydroxyl acrylic acid, 25~35 parts water-based hydroxyl polyurethane resin, 15~25 parts blocked isocyanate, 5~8 parts solvent, 5~25 parts deionized water and 10~20 parts color filler;Finish includes: 10~20 parts water-based hydroxyl acrylic acid, 15~25 parts water-based acrylic acid modified epoxy ester, 5~10 parts amino resin, 5~8 parts solvent, 5~35 parts deionized water and 10~15 parts color filler.The water-based glass spraying ink of the application has good color stability, good elasticity, good adhesion to glass substrate, high chemical resistance, good low-temperature shear resistance, high hardness;Preparation process is simple, low in cost, easy to operate when applied to glass substrate, low in construction cost, good adhesion between coating and glass substrate, and can be used for various products such as automotive interior, instrument dial, 3C electronic products, etc.

Description

Technical Field

[0001] This invention relates to the field of water-based coatings technology, specifically to a water-based glass spraying ink with good adhesion to glass substrates, stable color, good weather resistance, and good low-temperature shear performance, as well as its preparation method and application. Background Technology

[0002] With increasing environmental awareness, water-based coatings, as a more environmentally friendly coating material, are gaining wider acceptance and thus have promising application prospects. Water-based coatings use water as a solvent, saving significant resources. They eliminate the risk of fire during application and reduce air pollution. Furthermore, water-based coatings use only small amounts of low-toxicity alcohol ether organic solvents, improving working conditions and significantly reducing pollution and saving resources.

[0003] However, there are still many differences between water-based spray inks and oil-based inks. In terms of performance, existing water-based ink products cannot reach the same level as oil-based inks in terms of adhesion, chemical resistance and low-temperature shear strength, and cannot simultaneously meet the requirements of adhesion, chemical resistance and low-temperature pull-out strength, which has limited the application market of water-based inks. Summary of the Invention

[0004] This invention provides a water-based glass spraying ink to solve the technical problems of poor performance and poor adhesion to glass substrates of existing water-based inks.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A water-based glass spraying ink, comprising a primer and a topcoat;

[0007] The primer comprises the following components in parts by weight:

[0008] 5-10 parts of waterborne hydroxyl acrylic acid, 25-35 parts of waterborne hydroxyl polyurethane resin, 15-25 parts of blocked isocyanate, 5-8 parts of solvent, 5-25 parts of deionized water and 10-20 parts of pigments and fillers;

[0009] The topcoat comprises the following components in parts by weight:

[0010] 10-20 parts waterborne hydroxy acrylic acid, 15-25 parts waterborne acrylic acid modified epoxy ester, 5-10 parts amino resin, 5-8 parts solvent, 5-35 parts deionized water and 10-15 parts pigments and fillers.

[0011] The design concept of the above technical solution is as follows: First, the present invention selects waterborne hydroxyl acrylic and waterborne hydroxyl polyurethane resins to construct the resin system of the primer. On the one hand, the good compatibility of hydroxyl-containing emulsions or polyurethanes with pigments improves the color stability of inks after baking or long-term storage. On the other hand, both waterborne hydroxyl acrylic and waterborne hydroxyl polyurethane resins contain a certain amount of organosiloxane monomers. Organosiloxanes can be hydrolyzed to generate silanols, which then react with the hydroxyl groups on the surface of the inorganic glass substrate to generate siloxanes. At the same time, the groups of organosiloxanes can also undergo chemical reactions with organic matter to connect the inorganic substrate and organic matter together, increase the bonding strength, play a coupling role, and improve the performance of the coating. Secondly, this invention optimizes the crosslinking agent of the coating. Crosslinking agents for baking-type coatings generally include amino resins and blocked isocyanates. The three-dimensional structure of amino resins, especially the three-dimensional nonlinear structure formed by the reaction extension of hydroxyl groups on the acrylic emulsion backbone, leads to increased rigidity of the paint film and reduced flexibility and adhesion. However, amino resins, as crosslinking agents, have a higher crosslinking density and better chemical resistance. Blocked isocyanates have a linear structure, good flexibility and adhesion, but a low degree of crosslinking and relatively poor chemical resistance. Therefore, this application adds blocked isocyanates to the primer to improve adhesion and flexibility, while adding amino resins to the topcoat to increase the overall crosslinking degree of the coating and improve the chemical resistance of the paint.

[0012] As a further preferred embodiment of the above technical solution, the waterborne hydroxy acrylic resin in the primer has a Tg value of -20 to 0°C, and the waterborne hydroxy polyurethane resin has a Tg value of -20 to 0°C. Adding waterborne hydroxy acrylic resin within the above Tg range to the primer formulation can improve the flexibility of the coating film. Furthermore, the inventors have discovered that the Tg value of the resin has a significant impact on the low-temperature pull-out properties of the coating. By limiting the resin Tg value in this invention, good adhesion and a certain degree of rigidity can be provided to the coating at low temperatures.

[0013] As a further preferred embodiment of the above technical solution, the waterborne hydroxy acrylic acid is a water-diluted hydroxy acrylate dispersion, wherein the solid content of the waterborne hydroxy acrylic acid is 40-45%, the hydroxyl content is 5.5%, and the acid value is 45 mg KOH / g. Waterborne hydroxy acrylic acid with the above-mentioned hydroxyl content exhibits excellent chemical resistance and weather resistance; moreover, the high acid value of the waterborne hydroxy acrylic acid provides good adhesion to glass substrates, and also improves the wetting properties of pigments and fillers, resulting in better paint color stability.

[0014] As a further preferred embodiment of the above technical solution, the waterborne hydroxyl polyurethane resin is a waterborne anionic aliphatic hydroxyl polyurethane resin, and the solid content of the waterborne hydroxyl polyurethane resin is 30-35%, and the hydroxyl content is 3.3%.

[0015] As a further preferred embodiment of the above technical solution, the silicon-containing waterborne acrylic modified epoxy ester is an acrylic modified epoxy ester containing organosilicon groups, and the solid content of the silicon-containing waterborne acrylic modified epoxy ester is 50-60%.

[0016] As a further preferred embodiment of the above technical solution, the primer further includes the following components in parts by weight:

[0017] 0.3 to 0.6 parts substrate wetting agent, 1 to 3 parts dispersant, 0.2 to 1.0 parts fumed silica, 1 to 2 parts ultraviolet absorber, 0.7 to 2 parts leveling defoamer and 1 to 3 parts matting powder.

[0018] As a further preferred embodiment of the above technical solution, the topcoat further includes the following components in parts by weight:

[0019] 0.3 to 0.6 parts substrate wetting agent, 1 to 3 parts dispersant, 0.2 to 1.0 parts fumed silica, 1 to 2 parts ultraviolet absorber, 0.7 to 2 parts leveling defoamer and 1 to 3 parts matting powder.

[0020] As a further preferred embodiment of the above technical solution, the substrate wetting agent is a modified polyether siloxane copolymer and / or acetylenic diol surfactant.

[0021] As a further preferred embodiment of the above technical solution, the aqueous dispersant is an aqueous solution of a copolymer containing pigment affinity groups.

[0022] As a further preferred embodiment of the above technical solution, the ultraviolet absorber is a hydroxyphenyltriazine ultraviolet absorber.

[0023] As a further preferred embodiment of the above technical solution, the blocked isocyanate is an active blocked aliphatic polyisocyanate with an NCO content of 8%. This blocked isocyanate has a longer curing chain segment, the reactant is soft, and the reaction speed is fast, which can improve the drying performance and chemical resistance of water-based coatings.

[0024] As a further preferred embodiment of the above technical solution, the solvent includes at least one of DB, DBEE, and PM.

[0025] As a further preferred embodiment of the above technical solution, the leveling defoamer includes a leveling agent and a defoamer; the leveling agent is a polysiloxane-polyether copolymer, and the defoamer is a polyether-siloxane copolymer.

[0026] As a further preferred embodiment of the above technical solution, the fumed silica is hydrophobic fumed silica.

[0027] As a further preferred embodiment of the above technical solution, the matting powder is organically treated silica with a particle size of 1.0 to 1.5 μm.

[0028] Preferably, the pigments and fillers include at least one of titanium dioxide, carbon black, and talc.

[0029] As a further preferred embodiment of the above technical solution, the deionized water has a conductivity of less than 10 μS / cm;

[0030] Based on the same technical concept, the present invention also provides a method for preparing the above-mentioned water-based glass spraying ink, comprising the following steps:

[0031] (1) The pigments and fillers are pre-prepared into water-based resin-free color pastes;

[0032] (2) After the waterborne hydroxyl acrylic resin and waterborne hydroxyl polyurethane resin are mixed evenly, deionized water is added and the pH is adjusted to 8.0-9.0. Then, solvent and blocked isocyanate are added in sequence and mixed thoroughly to obtain mixed solution A.

[0033] (3) The water-based resin-free pigment is slowly added to the mixed solution A, and then dispersed at high speed until the fineness meets the requirements. After filtration, the primer of the water-based glass spraying ink is obtained.

[0034] (4) After the waterborne hydroxyl acrylic resin and the silicon-containing waterborne acrylic modified epoxy ester are mixed evenly, deionized water is added and the pH is adjusted to 8.0-9.0. Then, the solvent and amino resin are added in sequence, and after being fully mixed and dispersed evenly, a mixed solution B is obtained.

[0035] (5) The water-based resin-free pigment is slowly added to the mixed solution B, and then dispersed at high speed until the fineness meets the requirements. After filtration, the topcoat of the water-based glass spraying ink is obtained.

[0036] As a further preferred embodiment of the above technical solution, in step (1), the pigments and fillers are dispersed in deionized water and dispersed at a stirring speed of 800-1000 r / min for 20-30 min, and then ground at 3000-4000 rpm for 60-180 min to obtain the water-based resin-free pigment paste.

[0037] Based on the same technical concept, the present invention also provides an application of the above-mentioned water-based glass spraying ink or the water-based glass spraying ink prepared by the above-mentioned preparation method. The water-based glass spraying ink is used to form a protective and decorative coating on the surface of glass material. When using the water-based glass spraying ink, the silane coupling agent is mixed with the primer and the topcoat at a mass ratio of 2:100, and then sprayed onto the surface of the glass material.

[0038] Compared with the prior art, the advantages of the present invention are as follows:

[0039] (1) The water-based glass spraying ink of the present invention has the characteristics of smooth paint film, good color stability, good elasticity, good adhesion to glass substrate, high chemical resistance, good low temperature shear resistance and high hardness.

[0040] (2) The water-based glass spraying ink of the present invention has a simple preparation process, low cost, and is suitable for large-scale industrial production;

[0041] (3) The water-based glass spraying ink of the present invention is easy to operate and has low construction cost when applied to glass substrates. The coating has good adhesion to the glass substrate and can also be used on a variety of different substrates. It is suitable for a variety of products such as automotive interiors, instrument dials, and 3C electronic products. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to specific embodiments.

[0043] The components of the primer in the following examples:

[0044] The substrate wetting agent used is TEGO 240, manufactured by Evonik Industries.

[0045] The dispersant selected is BYK190, manufactured by BYK Chemicals.

[0046] The fumed silica used was the R812S product manufactured by Degussa.

[0047] The UV absorber selected is Tinuvin 1130, manufactured by BASF.

[0048] The leveling agent used is GLIDE450, manufactured by Degussa.

[0049] The defoamer selected is BASF's 902W product;

[0050] The blocked isocyanate used is the BL2000 product manufactured by Lanxess Chemicals.

[0051] The pigment and filler are titanium dioxide, specifically the product R706 manufactured by DuPont Chemicals.

[0052] In the following examples, the components of the topcoat are:

[0053] The substrate wetting agent used is TEGO 280, manufactured by Evonik Industries.

[0054] The dispersant selected was BYK2012, a product manufactured by BYK Chemicals.

[0055] The fumed silica used was the R812S product manufactured by Degussa.

[0056] The leveling agent used is GLIDE450, manufactured by Degussa.

[0057] The defoamer selected is BASF's 902W product;

[0058] The amino resin used is product 327 manufactured by ZX Resin (China) Co., Ltd.

[0059] The matting agent used is E1011;

[0060] The pigment and filler are titanium dioxide, specifically the product R706 manufactured by DuPont Chemicals.

[0061] The siloxane coupling agent selected is COATOSIL 2287 manufactured by Momentive.

[0062] Example 1:

[0063] The water-based glass spraying ink of this embodiment includes a primer and a topcoat, and the component ratios of the primer and topcoat are shown in Table 1 and Table 2, respectively.

[0064] The method for preparing the water-based glass spraying ink in this embodiment includes the following steps:

[0065] (1) Disperse the color powder to be adjusted at 1000r / min for 20min until fully mixed, then grind at 4000r for 60min to prepare water-based resin-free color paste for later use; prepare fumed silica into a slurry for later use.

[0066] (2) Disperse the waterborne hydroxyl acrylic resin and waterborne hydroxyl polyurethane resin at 800 r / min for 30 min, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, UV absorber, solvent, and blocked isocyanate in sequence, and disperse them evenly to obtain mixed solution 1.

[0067] (3) Slowly add the slurry and pigment from step (1) to the mixed solution 1 from step (2), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink primer component.

[0068] (4) Disperse the waterborne hydroxyl acrylic resin and the silicon-containing waterborne acrylic modified epoxy ester at 1000 r / min for 20 min until fully mixed, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, solvent and amino resin in sequence, and disperse them evenly to obtain mixed solution 2.

[0069] (5) Slowly add the slurry and pigment from step (1) to the mixed solution 2 from step (4), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink topcoat component.

[0070] The water-based glass spraying ink of this embodiment is used to form a protective and decorative coating on the surface of glass material. The specific method of use includes the following steps:

[0071] Substrate preparation: Degrease and remove dust. The ambient temperature for application is 20–25℃. Dilute the water-based glass spray ink primer with deionized water at a ratio of 5–15% by mass, adding 2% of a siloxane coupling agent. Dilute the topcoat with deionized water at a ratio of 5–15% by mass, also adding 2% of a water-based siloxane coupling agent. The application viscosity (Zahn 3# cup, 25℃) is 10–30 s for both. Apply the primer with an air pressure of 3–6 kPa and a spray gun nozzle diameter of 0.9–1.4 mm. The primer film thickness should be 20–30 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes. Then apply the topcoat, with a film thickness of 10–15 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes.

[0072] The performance of the paint film coating formed using the water-based glass spray ink of this embodiment was tested (the formation conditions of the paint film coating in each embodiment were kept consistent). The test methods are shown in Table 4, and the results are shown in Table 5.

[0073] Example 2:

[0074] The water-based glass spraying ink of this embodiment includes a primer and a topcoat, and the component ratios of the primer and topcoat are shown in Table 1 and Table 2, respectively.

[0075] The method for preparing the water-based glass spraying ink in this embodiment includes the following steps:

[0076] (1) Disperse the color powder to be adjusted at 800r / min for 30min until fully mixed, then grind at 3000r for 180min to prepare water-based resin-free color paste for later use; prepare fumed silica into a slurry for later use.

[0077] (2) Disperse the waterborne hydroxyl acrylic resin and waterborne hydroxyl polyurethane resin at 800 r / min for 30 min, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, UV absorber, solvent, and blocked isocyanate in sequence, and disperse them evenly to obtain mixed solution 1.

[0078] (3) Slowly add the slurry and pigment from step (1) to the mixed solution 1 from step (2), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink primer component.

[0079] (4) Disperse the waterborne hydroxyl acrylic resin and the silicon-containing waterborne acrylic modified epoxy ester at 1000 r / min for 20 min until fully mixed, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, solvent and amino resin in sequence, and disperse them evenly to obtain mixed solution 2.

[0080] (5) Slowly add the slurry and pigment from step (1) to the mixed solution 2 from step (4), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink topcoat component.

[0081] The water-based glass spraying ink of this embodiment is used to form a protective and decorative coating on the surface of glass material. The specific method of use includes the following steps:

[0082] Substrate preparation: Degrease and remove dust. The ambient temperature for application is 20–25℃. Dilute the water-based glass spray ink primer with deionized water at a ratio of 5–15% by mass, adding 2% of a siloxane coupling agent. Dilute the topcoat with deionized water at a ratio of 5–15% by mass, also adding 2% of a water-based siloxane coupling agent. The application viscosity (Zahn 3# cup, 25℃) is 10–30 s for both. Apply the primer with an air pressure of 3–6 kPa and a spray gun nozzle diameter of 0.9–1.4 mm. The primer film thickness should be 20–30 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes. Then apply the topcoat, with a film thickness of 10–15 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes.

[0083] The performance of the paint film coating formed using the water-based glass spray ink of this embodiment was tested (the formation conditions of the paint film coating in each embodiment were kept consistent). The test methods are shown in Table 4, and the results are shown in Table 5.

[0084] Example 3:

[0085] The water-based glass spraying ink of this embodiment includes a primer and a topcoat, and the component ratios of the primer and topcoat are shown in Table 1 and Table 2, respectively.

[0086] The method for preparing the water-based glass spraying ink in this embodiment includes the following steps:

[0087] (1) Disperse the color powder to be adjusted at 1000r / min for 20min until fully mixed, then grind at 4000r for 60min to prepare water-based resin-free color paste for later use; prepare fumed silica into a slurry for later use.

[0088] (2) Disperse the waterborne hydroxyl acrylic resin and waterborne hydroxyl polyurethane resin at 1000 r / min for 20 min, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, UV absorber, solvent, and blocked isocyanate in sequence, and disperse them evenly to obtain mixed solution 1.

[0089] (3) Slowly add the slurry and pigment from step (1) to the mixed solution 1 from step (2), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink primer component.

[0090] (4) Disperse the waterborne hydroxyl acrylic resin and the silicon-containing waterborne acrylic modified epoxy ester at 1000 r / min for 20 min until fully mixed, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, solvent and amino resin in sequence, and disperse them evenly to obtain mixed solution 2.

[0091] (5) Slowly add the slurry and pigment from step (1) to the mixed solution 2 from step (4), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink topcoat component.

[0092] The water-based glass spraying ink of this embodiment is used to form a protective and decorative coating on the surface of glass material. The specific method of use includes the following steps:

[0093] Substrate preparation: Degrease and remove dust. The ambient temperature for application is 20–25℃. Dilute the water-based glass spray ink primer with deionized water at a ratio of 5–15% by mass, adding 2% of a siloxane coupling agent. Dilute the topcoat with deionized water at a ratio of 5–15% by mass, also adding 2% of a water-based siloxane coupling agent. The application viscosity (Zahn 3# cup, 25℃) is 10–30 s for both. Apply the primer with an air pressure of 3–6 kPa and a spray gun nozzle diameter of 0.9–1.4 mm. The primer film thickness should be 20–30 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes. Then apply the topcoat, with a film thickness of 10–15 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes.

[0094] The performance of the paint film coating formed using the water-based glass spray ink of this embodiment was tested (the formation conditions of the paint film coating in each embodiment were kept consistent). The test methods are shown in Table 4, and the results are shown in Table 5.

[0095] Example 4:

[0096] The water-based glass spraying ink of this embodiment includes a primer and a topcoat, and the component ratios of the primer and topcoat are shown in Table 1 and Table 2, respectively.

[0097] The method for preparing the water-based glass spraying ink in this embodiment includes the following steps:

[0098] (1) Disperse the color powder to be adjusted at 1000r / min for 20min until fully mixed, then grind at 4000r for 60min to prepare water-based resin-free color paste for later use; prepare fumed silica into a slurry for later use.

[0099] (2) Disperse the waterborne hydroxyl acrylic resin and waterborne hydroxyl polyurethane resin at 800 r / min for 30 min, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, UV absorber, solvent, and blocked isocyanate in sequence, and disperse them evenly to obtain mixed solution 1.

[0100] (3) Slowly add the slurry and pigment from step (1) to the mixed solution 1 from step (2), then add matting powder, disperse at 800 r / min for 30 min until fully mixed, then disperse at 1200 r / min for 30 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink primer component.

[0101] (4) Disperse the waterborne hydroxyl acrylic resin and the silicon-containing waterborne acrylic modified epoxy ester at 1000 r / min for 20 min until fully mixed, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, solvent and amino resin in sequence, and disperse them evenly to obtain mixed solution 2.

[0102] (5) Slowly add the slurry and pigment from step (1) to the mixed solution 2 from step (4), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink topcoat component.

[0103] The water-based glass spraying ink of this embodiment is used to form a protective and decorative coating on the surface of glass material. The specific method of use includes the following steps:

[0104] Substrate preparation: Degrease and remove dust. The ambient temperature for application is 20–25℃. Dilute the water-based glass spray ink primer with deionized water at a ratio of 5–15% by mass, adding 2% of a siloxane coupling agent. Dilute the topcoat with deionized water at a ratio of 5–15% by mass, also adding 2% of a water-based siloxane coupling agent. The application viscosity (Zahn 3# cup, 25℃) is 10–30 s for both. Apply the primer with an air pressure of 3–6 kPa and a spray gun nozzle diameter of 0.9–1.4 mm. The primer film thickness should be 20–30 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes. Then apply the topcoat, with a film thickness of 10–15 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes.

[0105] The performance of the paint film coating formed using the water-based glass spray ink of this embodiment was tested (the formation conditions of the paint film coating in each embodiment were kept consistent). The test methods are shown in Table 4, and the results are shown in Table 5.

[0106] Example 5:

[0107] The water-based glass spraying ink of this embodiment includes a primer and a topcoat, and the component ratios of the primer and topcoat are shown in Table 1 and Table 2, respectively.

[0108] The method for preparing the water-based glass spraying ink in this embodiment includes the following steps:

[0109] (1) Disperse the color powder to be adjusted at 1000r / min for 20min until fully mixed, then grind at 4000r for 60min to prepare water-based resin-free color paste for later use; prepare fumed silica into a slurry for later use.

[0110] (2) Disperse the waterborne hydroxyl acrylic resin and waterborne hydroxyl polyurethane resin at 800 r / min for 30 min, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, UV absorber, solvent, and blocked isocyanate in sequence, and disperse them evenly to obtain mixed solution 1.

[0111] (3) Slowly add the slurry and pigment from step (1) to the mixed solution 1 from step (2), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink primer component.

[0112] (4) Disperse the waterborne hydroxyl acrylic resin and the silicon-containing waterborne acrylic modified epoxy ester at 800 r / min for 30 min until fully mixed, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, solvent and amino resin in sequence, and disperse them evenly to obtain mixed solution 2.

[0113] (5) Slowly add the slurry and pigment from step (1) to the mixed solution 2 from step (4), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink topcoat component.

[0114] The water-based glass spraying ink of this embodiment is used to form a protective and decorative coating on the surface of glass material. The specific method of use includes the following steps:

[0115] Substrate preparation: Degrease and remove dust. The ambient temperature for application is 20–25℃. Dilute the water-based glass spray ink primer with deionized water at a ratio of 5–15% by mass, adding 2% of a siloxane coupling agent. Dilute the topcoat with deionized water at a ratio of 5–15% by mass, also adding 2% of a water-based siloxane coupling agent. The application viscosity (Zahn 3# cup, 25℃) is 10–30 s for both. Apply the primer with an air pressure of 3–6 kPa and a spray gun nozzle diameter of 0.9–1.4 mm. The primer film thickness should be 20–30 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes. Then apply the topcoat, with a film thickness of 10–15 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes.

[0116] The performance of the paint film coating formed using the water-based glass spray ink of this embodiment was tested (the formation conditions of the paint film coating in each embodiment were kept consistent). The test methods are shown in Table 4, and the results are shown in Table 5.

[0117] Example 6:

[0118] The water-based glass spraying ink of this embodiment includes a primer and a topcoat, and the component ratios of the primer and topcoat are shown in Table 1 and Table 2, respectively.

[0119] The method for preparing the water-based glass spraying ink in this embodiment includes the following steps:

[0120] (1) Disperse the color powder to be adjusted at 1000r / min for 20min until fully mixed, then grind at 4000r for 60min to prepare water-based resin-free color paste for later use; prepare fumed silica into a slurry for later use.

[0121] (2) Disperse the waterborne hydroxyl acrylic resin and waterborne hydroxyl polyurethane resin at 800 r / min for 30 min, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, UV absorber, solvent, and blocked isocyanate in sequence, and disperse them evenly to obtain mixed solution 1.

[0122] (3) Slowly add the slurry and pigment from step (1) to the mixed solution 1 from step (2), then add matting powder, disperse at 1000 r / min for 20 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink primer component.

[0123] (4) Disperse the waterborne hydroxyl acrylic resin and the silicon-containing waterborne acrylic modified epoxy ester at 1000 r / min for 20 min until fully mixed, add deionized water, adjust the pH of the mixture to 8 (pH adjuster is DMEA), and then add leveling agent, defoamer, solvent and amino resin in sequence, and disperse them evenly to obtain mixed solution 2.

[0124] (5) Slowly add the slurry and pigment from step (1) to the mixed solution 2 from step (4), then add matting powder, disperse at 800 r / min for 30 min until fully mixed, then disperse at 1500 r / min for 20 min until the fineness is less than 25 μm, and filter to obtain the water-based glass spray ink topcoat component.

[0125] The water-based glass spraying ink of this embodiment is used to form a protective and decorative coating on the surface of glass material. The specific method of use includes the following steps:

[0126] Substrate preparation: Degrease and remove dust. The ambient temperature for application is 20–25℃. Dilute the water-based glass spray ink primer with deionized water at a ratio of 5–15% by mass, adding 2% of a siloxane coupling agent. Dilute the topcoat with deionized water at a ratio of 5–15% by mass, also adding 2% of a water-based siloxane coupling agent. The application viscosity (Zahn 3# cup, 25℃) is 10–30 s for both. Apply the primer with an air pressure of 3–6 kPa and a spray gun nozzle diameter of 0.9–1.4 mm. The primer film thickness should be 20–30 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes. Then apply the topcoat, with a film thickness of 10–15 μm. Allow it to surface dry at room temperature for 2–5 minutes, then bake at 155–165℃ for 20–30 minutes.

[0127] The performance of the paint film coating formed using the water-based glass spray ink of this embodiment was tested (the formation conditions of the paint film coating in each embodiment were kept consistent). The test methods are shown in Table 4, and the results are shown in Table 5.

[0128] Comparative Example 1:

[0129] The composition of the topcoat and primer of the spraying ink in this comparative example is shown in Table 3.

[0130] The performance of the paint film coating formed using the spray ink of this comparative example was tested (the formation conditions of the paint film coating in each embodiment were consistent). The test methods are shown in Table 3, and the results are shown in Table 6.

[0131] Comparative Example 2:

[0132] The composition of the topcoat and primer of the spraying ink in this comparative example is shown in Table 3.

[0133] The performance of the paint film coating formed using the spray ink of this comparative example was tested (the formation conditions of the paint film coating in each embodiment were consistent). The test methods are shown in Table 3, and the results are shown in Table 6.

[0134] Table 1. Component ratio of primer in water-based glass spraying inks of various embodiments (unit: parts by weight)

[0135]

[0136]

[0137] Table 2. Component ratio of topcoat in water-based glass spraying inks of various embodiments (unit: parts by weight)

[0138]

[0139]

[0140] Table 3. Component proportions of water-based glass spraying inks in each comparative example (unit: parts by weight)

[0141]

[0142]

[0143] Table 4. Performance testing methods for the paint film coatings formed by the inks in each embodiment and comparative example.

[0144]

[0145]

[0146] Table 5. Performance test results of the paint film coatings formed by the water-based glass spray inks of each embodiment.

[0147]

[0148] Table 6. Performance test results of the coating films formed by the water-based glass spray inks in each comparative example.

[0149]

[0150] The above are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, improvements and modifications obtained without departing from the inventive concept should also be considered within the scope of protection of the present invention.

Claims

1. A water-based glass spraying ink, characterized in that, Includes primer and topcoat; The primer is composed of the following components in parts by weight: 5-10 parts waterborne hydroxyl acrylic acid, 25-35 parts waterborne hydroxyl polyurethane resin, 15-25 parts blocked isocyanate, 5-8 parts solvent, 5-25 parts deionized water, 10-20 parts pigments and fillers, 0.3-0.6 parts substrate wetting agent, 1-3 parts dispersant, 0.2-1.0 parts fumed silica, 1-2 parts ultraviolet absorber, 0.7-2 parts leveling defoamer, and 1-3 parts matting agent; In the primer, the Tg value of the waterborne hydroxy acrylic acid is -20~0℃, and the Tg value of the waterborne hydroxy polyurethane resin is -20~0℃. The topcoat comprises the following components in parts by weight: 10-20 parts waterborne hydroxy acrylic acid, 15-25 parts silicone-containing waterborne acrylic acid modified epoxy ester, 5-10 parts amino resin, 5-8 parts solvent, 5-35 parts deionized water and 10-15 parts pigments and fillers; The silicon-containing waterborne acrylic modified epoxy ester is an acrylic modified epoxy ester containing organosilicon groups.

2. The water-based glass spraying ink according to claim 1, characterized in that, The aqueous hydroxy acrylic acid is a water-diluted hydroxy acrylate dispersion. The aqueous hydroxy acrylic acid has a solid content of 40-45%, a hydroxyl content of 5.5%, and an acid value of 45 mg KOH / g.

3. The water-based glass spraying ink according to claim 1, characterized in that, The waterborne hydroxyl polyurethane resin is a waterborne anionic aliphatic hydroxyl polyurethane resin, and the solid content of the waterborne hydroxyl polyurethane resin is 30~35%, and the hydroxyl content is 3.3%.

4. The water-based glass spraying ink according to claim 1, characterized in that, The solid content of the silicon-containing waterborne acrylic modified epoxy ester is 50-60%.

5. The water-based glass spraying ink according to any one of claims 1-4, characterized in that, The topcoat also includes the following components in parts by weight: 0.3~0.6 parts substrate wetting agent, 1~3 parts dispersant, 0.2~1.0 parts fumed silica, 1~2 parts ultraviolet absorber, 0.7~2 parts leveling defoamer and 1~3 parts matting powder.

6. A method for preparing the water-based glass spraying ink according to any one of claims 1-5, characterized in that, Includes the following steps: (1) The pigments and fillers are pre-prepared into water-based resin-free color pastes; (2) After the waterborne hydroxyl acrylic resin and waterborne hydroxyl polyurethane resin are mixed evenly, deionized water is added and the pH is adjusted to 8.0~9.

0. Then, solvent and blocked isocyanate are added in sequence and mixed thoroughly to obtain mixed solution A. (3) The water-based resin-free pigment is slowly added to the mixed solution A, and then dispersed at high speed until the fineness meets the requirements. After filtration, the primer of the water-based glass spraying ink is obtained. (4) After the waterborne hydroxyl acrylic resin and the silicon-containing waterborne acrylic modified epoxy ester are mixed evenly, deionized water is added and the pH is adjusted to 8.0~9.

0. Then, the solvent and amino resin are added in sequence, and after being fully mixed and dispersed evenly, a mixed solution B is obtained. (5) The water-based resin-free pigment is slowly added to the mixed solution B, and then dispersed at high speed until the fineness meets the requirements. After filtration, the topcoat of the water-based glass spraying ink is obtained.

7. The method for preparing water-based glass spraying ink according to claim 6, characterized in that, In step (1), the pigments and fillers are dispersed in deionized water and dispersed at a stirring speed of 800~1000 r / min for 20~30 min, and then ground at 3000-4000 rpm for 60~180 min to obtain the water-based resin-free pigment paste.

8. The application of a water-based glass spraying ink according to any one of claims 1-5 or a water-based glass spraying ink prepared by the preparation method according to claim 6 or 7, characterized in that, The water-based glass spraying ink is used to form a protective and decorative coating on the surface of glass material. When using the water-based glass spraying ink, the silane coupling agent is mixed with the primer and the topcoat at a mass ratio of 2:100, and then sprayed onto the surface of the glass material.

Images