A waterborne chameleon bake finish

Abstract

This invention discloses a water-based chameleon baking paint coating, comprising a primer layer and a topcoat layer covering the primer layer. The topcoat layer comprises the following components in parts by weight: 18-22 parts water-based acrylic resin, 1.5-2.2 parts dimethylethanolamine (DMEA), 60-62 parts deionized water, 0.8-1.2 parts silver oxide additive, 1.5-2.5 parts adhesion promoter, 5-7 parts amino resin, 0.25-0.35 parts wetting agent, 0.15-0.25 parts dispersant, and 6-9 parts chameleon powder. The primer layer comprises the following components in parts by weight: water-based acrylic resin... The mixture contains 65-85 parts acrylic resin, 0.15-0.25 parts dimethylethanolamine (DMEA), 9-11 parts deionized water, 1.5-2.5 parts diethylene glycol butyl ether, 1.5-2.5 parts ethylene glycol butyl ether, 0.5-1.5 parts special defoamer, 10-12 parts amino resin, 0.15-0.25 parts wetting agent, 1.5-2.5 parts adhesion promoter, and 9-11 parts carbon black paste. This composition solves the problems of interlayer adhesion, hardness, alcohol resistance, and salt spray variation in existing baking paints. Furthermore, chameleon powder is used as an effect pigment, resulting in coatings with different colors when viewed from different angles, providing excellent decorative appeal.

Description

Technical Field

[0001] This invention relates to the field of water-based coatings technology, and more particularly to a water-based chameleon baking paint coating. Background Technology

[0002] The coatings used for spraying metal bases and metal frames are mainly solvent-based. Solvent-based coatings not only cause serious environmental pollution, but also pose safety risks during production and can harm the health of employees. Therefore, the coating of these workpieces must be water-based.

[0003] Currently, water-based paints used in appliance bases and frames mainly consist of water-soluble acrylic resin and silver powder. However, their appearance, adhesion, wear resistance, recoating ability, alcohol resistance, orientation, and salt spray resistance result in a short service life and weak color change from various angles. Summary of the Invention

[0004] The purpose of this invention is to provide a water-based chameleon-effect baked enamel composite coating, wherein the primer and topcoat both use water-based acrylic resin and amino resin as film-forming substances, and undergo cross-linking reaction under high temperature conditions to solve the problems of adhesion, hardness, alcohol resistance, and poor salt spray in existing baked enamels; in addition, the topcoat uses chameleon powder as an effect pigment, so that the coating has different colors when viewed from different angles, and has a good decorative effect.

[0005] This invention is achieved through the following technical solution: a water-based chameleon baking paint coating, the water-based chameleon baking paint coating comprising a primer layer and a topcoat layer covering the primer layer, the topcoat layer comprising the following components in parts by weight:

[0006] 18-22 parts of water-based acrylic resin,

[0007] Dimethylethanolamine (DMEA) 1.5-2.2 parts,

[0008] 60-62 parts deionized water

[0009] Silver-containing additive 0.8-1.2 parts,

[0010] Adhesion promoter 1.5-2.5 parts,

[0011] 5-7 parts of amino resin,

[0012] 0.25-0.35 parts of wetting agent.

[0013] Dispersant 0.15-0.25 parts,

[0014] Chameleon powder 6-9 parts.

[0015] The primer layer comprises the following components in parts by weight:

[0016] 65-85 parts of water-based acrylic resin

[0017] Dimethylethanolamine (DMEA) 0.15-0.25 parts,

[0018] 9-11 parts deionized water

[0019] 1.5-2.5 parts of diethylene glycol butyl ether

[0020] 1.5-2.5 parts of ethylene glycol butyl ether

[0021] Special defoamer 0.5-1.5 parts,

[0022] 10-12 parts of amino resin,

[0023] 0.15-0.25 parts of wetting agent.

[0024] Adhesion promoter 1.5-2.5 parts,

[0025] 9-11 parts of charcoal black paste.

[0026] Preferably, the topcoat layer comprises the following components in parts by weight:

[0027] 20 parts of water-based acrylic resin

[0028] Dimethylethanolamine (DMEA) 1.8 parts,

[0029] 61 parts of deionized water

[0030] One part of silver-based adjuvant.

[0031] 2 parts adhesion promoter

[0032] 6 parts amino resin,

[0033] 0.3 parts wetting agent,

[0034] 0.2 parts wetting and dispersing agent,

[0035] Eight portions of chameleon powder.

[0036] Preferably, the primer layer comprises the following components in parts by weight:

[0037] 70 parts of water-based acrylic resin,

[0038] Dimethylethanolamine (DMEA) 0.2 parts,

[0039] 10 parts deionized water

[0040] 2 parts of diethylene glycol butyl ether

[0041] 2 parts of ethylene glycol butyl ether

[0042] 0.8 parts of defoamer

[0043] 11 parts of amino resin,

[0044] 0.2 parts wetting agent,

[0045] 2 parts adhesion promoter

[0046] 10 parts charcoal black paste;

[0047] Preferably, the silver-absorbing additive is selected from BYK 8421.

[0048] Preferably, the adhesion promoter is Lubrizol 2062.

[0049] Preferably, the amino resin is selected from CYMEL 325 amino resin.

[0050] Preferably, the wetting agent is selected from Tego270 wetting agent.

[0051] Preferably, the dispersant is selected from BYK192 dispersant.

[0052] The amino resin of the primer is selected from CYMEL327 amino resin, and the defoamer is BYK-028 from BYK.

[0053] The preparation method of the primer is as follows:

[0054] Step a: Premix ethylene glycol butyl ether with diethylene glycol butyl ether;

[0055] Step b: Weigh the water-based acrylic resin, then slowly pour in the mixture prepared in step a, mix for 10 minutes to ensure the resin is completely mixed;

[0056] Step c: Add dimethylethanolamine (DMEA) in small amounts multiple times to ensure system stability, then stir for 10 minutes; add deionized water and stir for 5 minutes.

[0057] Step d: Add defoamer, wetting agent and adhesion promoter, and disperse at high speed for 15 minutes;

[0058] Step e: Add amino resin, mix well, then add carbon black paste and stir for 10 minutes to obtain the primer;

[0059] The preparation method of the topcoat is as follows:

[0060] Step a: Mix water-based acrylic resin with dimethylethanolamine (DMEA), adding DMEA in small amounts several times to ensure complete neutralization, then stir for 10 minutes; add deionized water and stir for 5 minutes.

[0061] Step b: Add silver busbar additive, wetting agent, dispersant and adhesion promoter, and stir for 5 minutes;

[0062] Step c: Add amino resin, mix well, then add chameleon powder and stir for 10 minutes to obtain the topcoat.

[0063] This invention discloses a method for preparing a water-based chameleon-shaped baking paint coating, the method comprising the following steps:

[0064] The aluminum substrate 1 is degreased and polished for later use;

[0065] The primer is mixed with pure water at a ratio of 1:0.1-0.3 to obtain a primer paste.

[0066] The primer paste is applied to the polished aluminum plate and then baked at a first preset temperature to obtain a cured primer layer.

[0067] The topcoat is mixed with purified water at a ratio of 1:0.1-0.2 to obtain a topcoat paste.

[0068] The topcoat paste is applied to the cured primer layer and then baked at a second preset temperature to obtain a chameleon baked paint topcoat layer.

[0069] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0070] 1. The topcoat of this invention uses high-grade acrylic resin, with water-based acrylic resin and amino resin as film-forming substances. A cross-linking reaction occurs under high-temperature conditions to solve the problems of poor interlayer adhesion, hardness, alcohol resistance, and salt spray in existing water-based baking paints. Pigments, chameleon powder, functional fillers, and special imported additives are added as effect pigments, resulting in a coating with different colors viewed from different angles and excellent decorative appeal. The resulting coating has the following characteristics: superior physical properties, excellent chemical resistance, good orientation, strong metallic feel, and strong color change from all angles.

[0071] 2. The primer enhances the adhesion between the coating and the base aluminum plate through acrylic resin and adhesion promoter, and then uses amino resin to participate in the cross-linking reaction to improve salt spray resistance. Furthermore, the acrylic resin in the topcoat has good compatibility with the primer and strong adhesion, thus the present invention has strong adhesion; the paint film is smooth and the gloss is adjustable;

[0072] 3. This invention, when diluted with water, is non-flammable and non-explosive, and has good water resistance, solvent resistance, and color retention. Attached Figure Description

[0073] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0074] Figure 1 This is a schematic diagram of the structure of the chameleon paint coating provided by the present invention;

[0075] The reference numerals in the attached diagram represent: 1-base aluminum plate, 2-primer layer, 3-topcoat layer. Detailed Implementation

[0076] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. It should be noted that this invention is already in the actual research and development stage.

[0077] Example 1

[0078] A water-based chameleon-shaped baking paint coating, the water-based chameleon-shaped baking paint coating comprising a primer layer and a topcoat layer covering the primer layer, the topcoat layer comprising the following components in parts by weight:

[0079] Waterborne acrylic resin 20,

[0080] Dimethylethanolamine (DMEA) 1.8

[0081] Deionized water 61,

[0082] Silver-based additive 1,

[0083] Adhesion aid 2,

[0084] Amino resin 6,

[0085] Wetting agent 0.3,

[0086] Dispersant 0.2,

[0087] Chameleon powder 8.

[0088] The primer layer comprises the following components in parts by weight:

[0089] 70 parts of water-based acrylic resin,

[0090] Dimethylethanolamine (DMEA) 0.2,

[0091] Deionized water 10,

[0092] Diethylene glycol butyl ether 2,

[0093] Ethylene glycol butyl ether 2,

[0094] Defoamer 0.8,

[0095] Amino resin 11,

[0096] Wetting agent 0.2,

[0097] Adhesion aid 2,

[0098] 10. Carbon black paste.

[0099] The preparation method of the primer is as follows:

[0100] Step a: Premix ethylene glycol butyl ether with diethylene glycol butyl ether;

[0101] Step b: Add water-based acrylic resin to the mixture obtained in step a, mix for 10 minutes to ensure that the resin is completely mixed;

[0102] Step c: Add dimethylethanolamine (DMEA) in small amounts several times to ensure complete neutralization, then stir for 10 minutes; add deionized water and stir for 5 minutes.

[0103] Step d: Add defoamer, wetting agent and adhesion promoter, and stir for 5 minutes;

[0104] Step e: Add amino resin, mix well, then add carbon black paste and stir for 10 minutes to obtain the primer;

[0105] The preparation method of the topcoat is as follows:

[0106] Step a: Mix water-based acrylic resin with dimethylethanolamine (DMEA), adding DMEA in small amounts several times to ensure complete neutralization, then stir for 10 minutes; add deionized water and stir for 5 minutes.

[0107] Step b: Add silver busbar additive, wetting agent, dispersant and adhesion promoter, and stir for 5 minutes;

[0108] Step c: Add amino resin, mix well, then add chameleon powder and stir for 10 minutes to obtain the topcoat.

[0109] A method for preparing a water-based chameleon paint coating, the method comprising:

[0110] The aluminum substrate 1 is degreased and polished for later use;

[0111] The primer is mixed with pure water at a ratio of 1:0.1 to obtain a primer slurry.

[0112] The primer paste is coated onto the substrate and then baked at a first preset temperature to obtain a cured primer layer 2.

[0113] The topcoat is mixed with purified water at a ratio of 1:0.2 to obtain a topcoat paste.

[0114] The topcoat paste is applied onto the cured primer layer, and then baked at a second preset temperature to obtain the chameleon-coated topcoat layer 3. The resulting chameleon-coated panel is shown below. Figure 1 As shown.

[0115] Example 2

[0116] A water-based chameleon-shaped baking paint coating, the water-based chameleon-shaped baking paint coating comprising a primer layer and a topcoat layer covering the primer layer, the topcoat layer comprising the following components in parts by weight:

[0117] Waterborne acrylic resin 18,

[0118] Dimethylethanolamine (DMEA) 1.5

[0119] Deionized water 60,

[0120] Silver-plating additive 0.8,

[0121] Adhesion enhancer 1.5,

[0122] Amino resin 5,

[0123] Wetting agent 0.25,

[0124] Dispersant 0.15,

[0125] Chameleon powder 6.

[0126] The primer layer comprises the following components in parts by weight:

[0127] 65 parts of water-based acrylic resin

[0128] Dimethylethanolamine (DMEA) 0.15,

[0129] Deionized water 9,

[0130] Diethylene glycol butyl ether 1.5,

[0131] 1.5g of ethylene glycol butyl ether

[0132] Special defoamer 0.5,

[0133] Amino resin 10,

[0134] Wetting agent 0.15,

[0135] Adhesion enhancer 1.5,

[0136] 9. Carbon black paste.

[0137] The preparation method of the primer is as follows:

[0138] Step a: Premix ethylene glycol butyl ether with diethylene glycol butyl ether;

[0139] Step b: Weigh the water-based acrylic resin, then slowly pour in the mixture prepared in step a, mix for 10 minutes to ensure the resin is completely mixed;

[0140] Step c: Add dimethylethanolamine (DMEA) in small amounts multiple times to ensure system stability, then stir for 10 minutes; add deionized water and stir for 5 minutes.

[0141] Step d: Add defoamer, wetting agent and adhesion promoter, and disperse at high speed for 15 minutes;

[0142] Step e: Add amino resin, mix well, then add carbon black paste and stir for 10 minutes to obtain the primer;

[0143] The preparation method of the topcoat is as follows:

[0144] Step a: Mix water-based acrylic resin with dimethylethanolamine (DMEA), adding DMEA in small amounts several times to ensure complete neutralization, then stir for 10 minutes; add deionized water and stir for 5 minutes.

[0145] Step b: Add silver busbar additive, wetting agent, dispersant and adhesion promoter, and stir for 5 minutes;

[0146] Step c: Add amino resin, mix well, then add chameleon powder and stir for 10 minutes to obtain the topcoat.

[0147] A method for preparing a water-based chameleon paint coating, the method comprising:

[0148] The aluminum substrate 1 is degreased and polished for later use;

[0149] The primer was mixed with pure water at a ratio of 1:0.2 to obtain a primer slurry.

[0150] The primer paste is coated onto the substrate and then baked at a first preset temperature to obtain a cured primer layer 2.

[0151] The topcoat is mixed with purified water at a ratio of 1:0.1 to obtain a topcoat paste.

[0152] The topcoat paste is applied onto the cured primer layer, and then baked at a second preset temperature to obtain the chameleon-coated topcoat layer 3. The resulting chameleon-coated panel is shown below. Figure 1 As shown.

[0153] Example 3

[0154] A water-based chameleon-shaped baking paint coating, the water-based chameleon-shaped baking paint coating comprising a primer layer and a topcoat layer covering the primer layer, the topcoat layer comprising the following components in parts by weight:

[0155] Waterborne acrylic resin 22,

[0156] Dimethylethanolamine (DMEA) 2.2,

[0157] Deionized water 62,

[0158] Silver-based additive 1.2,

[0159] Adhesion enhancer 2.5,

[0160] Amino resin 7,

[0161] Wetting agent 0.35,

[0162] Dispersant 0.25,

[0163] Chameleon powder 9.

[0164] The primer layer comprises the following components in parts by weight:

[0165] 85 parts of water-based acrylic resin

[0166] Dimethylethanolamine (DMEA) 0.25,

[0167] Deionized water 11,

[0168] Diethylene glycol butyl ether 2.5,

[0169] Ethylene glycol butyl ether 2.5,

[0170] Special defoamer 1.5,

[0171] Amino resin 12,

[0172] Wetting agent 0.25,

[0173] Adhesion enhancer 2.5,

[0174] Carbon black paste 11.

[0175] The preparation method of the primer is as follows:

[0176] Step a: Premix ethylene glycol butyl ether with diethylene glycol butyl ether;

[0177] Step b: Add water-based acrylic resin to the mixture obtained in step a, mix for 10 minutes to ensure that the resin is completely mixed;

[0178] Step c: Add dimethylethanolamine (DMEA) in small amounts several times to ensure complete neutralization, then stir for 10 minutes; add deionized water and stir for 5 minutes.

[0179] Step d: Add defoamer, wetting agent and adhesion promoter, and stir for 5 minutes;

[0180] Step e: Add amino resin, mix well, then add carbon black paste and stir for 10 minutes to obtain the primer;

[0181] The preparation method of the topcoat is as follows:

[0182] Step a: Mix water-based acrylic resin with dimethylethanolamine (DMEA), adding DMEA in small amounts several times to ensure complete neutralization, then stir for 10 minutes; add deionized water and stir for 5 minutes.

[0183] Step b: Add silver busbar additive, wetting agent, dispersant and adhesion promoter, and stir for 5 minutes;

[0184] Step c: Add amino resin, mix well, then add chameleon powder and stir for 10 minutes to obtain the topcoat.

[0185] A method for preparing a water-based chameleon paint coating, the method comprising:

[0186] The aluminum substrate 1 is degreased and polished for later use;

[0187] The primer was mixed with pure water at a ratio of 1:01 to obtain a primer paste.

[0188] The primer paste is coated onto the substrate and then baked at a first preset temperature to obtain a cured primer layer 2.

[0189] The topcoat is mixed with purified water at a ratio of 1:0.2 to obtain a topcoat paste.

[0190] The topcoat paste is applied onto the cured primer layer, and then baked at a second preset temperature to obtain the chameleon-coated topcoat layer 3. The resulting chameleon-coated panel is shown below. Figure 1 As shown.

[0191] The test results and test standards of the chameleon paint layer obtained in Example 1 are shown in Table 1:

[0192] Table 1

[0193] project index Reference Standard Paint film color and appearance Conforms to standard samples and their color difference range; flat and smooth. Visual inspection Solid content % 23±2 GB / T1725 gloss 30-60 (negotiable) GB / T9754 Hardness (pencil) ≥2H GB / T6739 Flexibility (mm) ≤1mm GB / T1731 Adhesion level ≤ Level 1 GB / T1720 Boiling water resistant ≥2h, no bubbling or peeling GB / T1733 Salt spray resistance ≥300h (primer film thickness 15-20μm, topcoat film thickness 15-20μm) GB / T1771 RCA Test ≥200 times ASTMF2357-04 Alcohol-resistant (1kg) ≥500 times GB / T23989

[0194] As shown in the table above, the chameleon paint film prepared by this method improves the surface defects of the paint, has the effect of resisting salt spray and alcohol wiping, and has strong adhesion.

[0195] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A water-based chameleon-shaped baking paint coating, characterized in that, The water-based chameleon baking paint coating is applied to an aluminum substrate. The water-based chameleon baking paint coating includes a primer layer and a topcoat layer covering the primer layer. The topcoat layer comprises the following components in parts by weight: 18-22 parts of water-based acrylic resin, Dimethylethanolamine (DMEA) 1.5-2.2 parts, 60-62 parts deionized water Silver-containing additive 0.8-1.2 parts, Adhesion promoter 1.5-2.5 parts, 5-7 parts of amino resin, 0.25-0.35 parts of wetting agent. Dispersant 0.15-0.25 parts, 6-9 parts chameleon powder; The primer layer comprises the following components in parts by weight: 65-85 parts of water-based acrylic resin Dimethylethanolamine (DMEA) 0.15-0.25 parts, 9-11 parts deionized water 1.5-2.5 parts of diethylene glycol butyl ether 1.5-2.5 parts of ethylene glycol butyl ether Special defoamer 0.5-1.5 parts, 10-12 parts of amino resin, Wetting agent 0.15-0.25 parts, Adhesion promoter 1.5-2.5 parts, 9-11 parts of charcoal black paste; The silver plating additive is selected from BYK 8421; the adhesion promoter is Lubrizol 2062; the amino resin of the topcoat is selected from CYMEL 325 amino resin; the wetting agent is selected from Tego 270 wetting agent; the dispersant is selected from BYK 192 dispersant; the amino resin of the primer is selected from CYMEL 327 amino resin; and the special defoamer is BYK-028.

2. The water-based chameleon paint coating according to claim 1, characterized in that, The topcoat layer comprises the following components in parts by weight: 20 parts of water-based acrylic resin Dimethylethanolamine (DMEA) 1.8 parts, 61 parts of deionized water One part of silver-based adjuvant. 2 parts adhesion promoter 6 parts amino resin, 0.3 parts wetting agent, 0.2 parts wetting and dispersing agent, Eight portions of chameleon powder.

3. The water-based chameleon paint coating according to claim 1, characterized in that, The primer layer comprises the following components in parts by weight: 70 parts of water-based acrylic resin, Dimethylethanolamine (DMEA) 0.2 parts, 10 parts deionized water 2 parts of diethylene glycol butyl ether 2 parts of ethylene glycol butyl ether 0.8 parts of special defoamer 11 parts of amino resin, 0.2 parts wetting agent, 2 parts adhesion promoter 10 parts of charcoal black paste.

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