Glitter powder flocked dot imitation material as well as preparation method and application thereof

Abstract

The invention provides a glitter powder imitation flocking point material and a preparation method and application thereof, the glitter powder imitation flocking point material comprises an aluminum foil and a coating attached to the surface of the aluminum foil, the coating comprises a pigment and an additive, and the additive comprises acrylic resin and a cross-linking agent; the mass ratio of the acrylic resin to the cross-linking agent is 1: (0.25-0.45); by adding an additive with specific composition into the material of the coating, the coating is firmly attached to the surface of the aluminum foil, so that the obtained glitter powder fiber dot material is not easy to decolorize, can be widely applied to appearance modification of general-purpose plastics such as PP, ABS and HIPS, has the characteristics of high contrast ratio, selectable color, particle size and shape and the like, can be used for obtaining plastic parts with spot effect, and has good market prospects. The material can be widely applied to the industries of automobile interior and exterior, household appliances, consumer electronics and the like.

Description

Technical Field

[0001] This invention belongs to the field of glitter powder technology, specifically relating to a glitter powder imitation flocking dot material, its preparation method, and its application. Background Technology

[0002] Plastic parts with a speckled aesthetic effect are gaining popularity in industries such as automotive interior and exterior trim, home appliances, and consumer electronics due to their one-piece molding characteristics, and are forming a green and low-carbon trend. Currently, the main materials used for speckled effects on the market include aluminum foil glitter. Aluminum foil glitter consists of an aluminum foil substrate layer and a surface coating; it has advantages such as strong decorative properties, good process adaptability, and controllable costs.

[0003] However, due to insufficient optical compatibility between aluminum foil and other materials, the color contrast of aluminum foil glitter needs to be further improved, which limits its application in some high-end scenarios, such as those with high requirements for color visual effects.

[0004] Therefore, developing a glitter powder imitation flocking dot material with strong contrast and high color fastness is an urgent problem to be solved in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a glitter powder imitation flocking dot material, its preparation method, and its application. The glitter powder imitation flocking dot material has the characteristics of strong contrast, multiple selectable color particle sizes and shapes, and strong adhesion that is not easy to fade. The plastic parts with speckled effect prepared can be widely used in industries such as automotive interior and exterior trim, home appliances, and consumer electronics.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a glitter powder imitation flocking dot material, the glitter powder imitation flocking dot material comprising an aluminum foil and a coating attached to the surface of the aluminum foil; the coating material comprises pigments and additives; the additives comprise acrylic resin and a crosslinking agent; the mass ratio of the acrylic resin and the crosslinking agent is 1:(0.25~0.45).

[0008] The glitter powder imitation flocking dot material provided by this invention includes an aluminum foil and a coating attached to the surface of the aluminum foil. The coating material is defined as including pigments and additives, and the additives are further defined as including acrylic resin and crosslinking agent in a specific mass ratio. By selecting the additives with the above-mentioned specific composition, the pigments in the coating can be firmly attached to the surface of the aluminum foil, thereby obtaining a glitter powder imitation flocking dot material with firm color and not easy to fall off, and with strong contrast. It can be widely used in the appearance modification of general plastics such as PP, ABS and HIPS. It has the characteristics of strong contrast, selectable color particle size and shape, and can produce plastic parts with a speckled effect. It can be widely used in automotive interior and exterior trim, home appliances and consumer electronics industries.

[0009] Preferably, the aluminum foil content in the glitter powder imitation flocking dot material is 99-99.6% by mass, such as 99%, 99.1%, 99.2%, 99.3%, 99.4%, 99.5%, or 99.6%.

[0010] Preferably, the pigment content in the glitter powder imitation flocking dot material is 0.2% to 0.5% by mass, such as 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, or 0.45%.

[0011] Preferably, the pigment includes any one or a combination of at least two of titanium dioxide, bis(p-chlorophenyl)-1,4-dione pyrrolopyrrole, phthalocyanine blue, or 2-(3-hydroxy-2-quinolinyl)-1,3-indanedione.

[0012] Preferably, the mass ratio of the acrylic resin to the crosslinking agent is 1:(0.25~0.45), for example, 1:0.25, 1:0.26, 1:0.27, 1:0.28, 1:0.29, 1:0.3, 1:0.31, 1:0.32, 1:0.33, 1:0.34, 1:0.35, 1:0.36, 1:0.37, 1:0.38, 1:0.39, 1:0.40, 1:0.41, 1:0.42, 1:0.43, 1:0.44, etc.

[0013] Preferably, the number average molecular weight of the acrylic resin is 50,000 to 230,000, for example, it can be 50,000, 60,000, 70,000, 80,000, 90,000, 100,000, 110,000, 120,000, 140,000, 160,000, 180,000, 190,000, 200,000, 210,000, 220,000 or any of the above values, more preferably 130,000 to 190,000.

[0014] In this invention, the number-average molecular weight of the acrylic resin is determined by gel permeation chromatography (GPC).

[0015] In this invention, the acrylic resin comprises a copolymer of acrylic monomers and styrene, wherein the acrylic monomers include (meth)acrylic acid and / or (meth)acrylate; the molar percentage of the acrylic monomers in the copolymer of acrylic monomers and styrene is 10-90%, for example, it can be 20-80%, 30-70%, 40-60%, etc.

[0016] Preferably, the crosslinking agent includes amine crosslinking agents and / or acrylate crosslinking agents, and more preferably acrylate crosslinking agents.

[0017] Preferably, the acrylate crosslinking agent includes 1,4-butanediol diacrylate.

[0018] Preferably, the amine crosslinking agent includes an epoxy resin amine adduct curing agent.

[0019] In this invention, the epoxy resin amine adduct curing agent refers to an adduct formed by the addition reaction of an amine and an epoxy resin. The amine includes aromatic amines and / or aliphatic amines. Specifically, the amine includes m-phenylenediamine, diaminodiphenylmethane, diaminodiphenyl sulfone, polyamide, etc. For example, the epoxy resin amine adduct curing agent includes, but is not limited to, HY 940 from Huntsman Chemical Trading (Shanghai) Co., Ltd.

[0020] Preferably, the additive also includes a surfactant.

[0021] Preferably, the mass ratio of the acrylic resin to the surfactant is 1:(0.05~0.08), for example, 1:0.052, 1:0.054, 1:0.055, 1:0.056, 1:0.058, 1:0.06, 1:0.062, 1:0.064, 1:0.065, 1:0.066, 1:0.068, 1:0.07, 1:0.072, 1:0.074, 1:0.075, 1:0.076, 1:0.078, 1:0.079, etc.

[0022] Preferably, the surfactant includes a nonionic surfactant.

[0023] Preferably, the nonionic surfactant comprises C12-13 linear primary alcohol polyoxyethylene ether.

[0024] Secondly, the present invention provides a method for preparing the glitter powder-based flocking dot material described in the first aspect, the method comprising the following steps:

[0025] (1) Dissolve acrylic resin, crosslinking agent and optionally surfactant in solvent to obtain additive slurry, then add pigment to the obtained additive slurry and mix to obtain coating slurry;

[0026] (2) The coating slurry obtained in step (1) is coated on the surface of aluminum foil, cured and cut to obtain the glitter powder imitation flocking dot material.

[0027] The method for preparing glitter powder imitation flocking dot material provided by the present invention firstly involves preparing an additive slurry with specific components, then adding pigments and mixing to obtain a coating slurry; then coating the obtained coating slurry onto the surface of an aluminum foil sheet to obtain aluminum foil sheets of different colors; after curing and cutting, an aluminum foil glitter powder imitation flocking dot material with regular shape and uniform size can be obtained, which can be applied to the appearance of general plastics such as PP, ABS and HIPS.

[0028] Preferably, the solid content of the additive slurry in step (1) is 50-60%, such as 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59% or 60%.

[0029] Preferably, the solvent in step (1) includes ketone solvents and / or alcohol solvents.

[0030] In this invention, the specific types of ketone solvents and alcohol solvents are not specifically specified, and the ketone solvents include, but are not limited to, butanone; the alcohol solvents include, but are not limited to, ethanol.

[0031] In this invention, the curing method includes drying with infrared radiation at 45-55°C for 1-5 minutes, followed by ultraviolet irradiation for 10-40 seconds; or heating at 40-80°C for 20-30 minutes.

[0032] Thirdly, the present invention provides a speckled appearance plastic part, wherein the material of the speckled appearance plastic part comprises the following components by weight: 75-85 parts by weight of resin, 0.002-0.008 parts by weight of color powder, 0.0005-0.002 parts by weight of glitter powder imitation flocking dot material as described in the first aspect, and 10-30 parts by weight of filler.

[0033] The resin content can be 75 parts by weight, 76 parts by weight, 77 parts by weight, 78 parts by weight, 79 parts by weight, 80 parts by weight, 81 parts by weight, 82 parts by weight, 83 parts by weight, 84 parts by weight, or 85 parts by weight, and the resin content in the material of the speckled appearance plastic part is not less than 70%.

[0034] The amount of pigment used can be 0.002 parts by weight, 0.003 parts by weight, 0.004 parts by weight, 0.005 parts by weight, 0.006 parts by weight, 0.007 parts by weight, 0.0075 parts by weight, or 0.008 parts by weight, etc.

[0035] The amount of glitter powder imitation flocking dot material mentioned in the first aspect can be 0.0005 parts by weight, 0.0006 parts by weight, 0.0007 parts by weight, 0.0008 parts by weight, 0.0009 parts by weight, 0.001 parts by weight, 0.0011 parts by weight, 0.0012 parts by weight, 0.0013 parts by weight, 0.0014 parts by weight, 0.0015 parts by weight, 0.0017 parts by weight, 0.0019 parts by weight, or 0.002 parts by weight, etc.

[0036] The amount of the filler can be 10 parts by weight, 12 parts by weight, 14 parts by weight, 16 parts by weight, 18 parts by weight, 20 parts by weight, 22 parts by weight, 24 parts by weight, 26 parts by weight, 28 parts by weight, or 30 parts by weight, etc.

[0037] Preferably, the resin includes any one or a combination of at least two of PP resin, ABS resin, or HIPS resin. Considering high impact performance, ABS resin or HIPS resin is more preferred, and ABS resin is particularly preferred.

[0038] Preferably, the pigment includes carbon black.

[0039] Preferably, the filler includes at least one of talc, calcium carbonate, or barium sulfate.

[0040] Preferably, the material of the speckled appearance plastic part also includes antioxidants.

[0041] Preferably, the antioxidant includes hindered phenolic antioxidants, including but not limited to antioxidant 1098.

[0042] Preferably, the antioxidant content in the material of the spotted plastic part is 0.0005 to 0.002 parts by weight, such as 0.0005 parts by weight, 0.0007 parts by weight, 0.0009 parts by weight, 0.0011 parts by weight, 0.0013 parts by weight, 0.0015 parts by weight, 0.0017 parts by weight, 0.0019 parts by weight, or 0.002 parts by weight.

[0043] Fourthly, the present invention provides a method for preparing a speckled appearance plastic part as described in the third aspect, the method comprising the following steps:

[0044] (A1) A portion of the resin, pigment, filler, and optionally antioxidant are mixed to obtain mixture A; the remaining portion of the resin is mixed with the glitter powder imitation flocking dot material as described in the first aspect to obtain mixture B;

[0045] (A2) The mixture A obtained in step (A1) is fed by the main feeder and the mixture B obtained in step (A1) is fed by the side feeder. The mixture is then extruded using a twin-screw extruder to obtain the spotted plastic part.

[0046] Preferably, the portion of resin described in step (A1) accounts for 70-80% of the total mass of all resins, for example, 70%, 72%, 74%, 76%, 78%, or 80%.

[0047] Preferably, the mixing time for mixing a portion of the resin, pigment, filler and optionally antioxidant in step (A1) is 3 to 5 minutes, for example, 3 minutes, 3.2 minutes, 3.4 minutes, 3.6 minutes, 3.8 minutes, 4 minutes, 4.2 minutes, 4.4 minutes, 4.6 minutes, 4.8 minutes or 5 minutes.

[0048] Preferably, the mixing time for mixing the remaining resin and the glitter powder imitation flocking dot material as described in the first aspect in step (A2) is 3 to 5 minutes, for example, 3 minutes, 3.2 minutes, 3.4 minutes, 3.6 minutes, 3.8 minutes, 4 minutes, 4.2 minutes, 4.4 minutes, 4.6 minutes, 4.8 minutes or 5 minutes.

[0049] Preferably, the extrusion molding temperature in step (A2) is 200~230℃, such as 200℃, 205℃, 210℃, 215℃, 220℃, 225℃ or 230℃.

[0050] Fifthly, the present invention provides an application of the speckled appearance plastic parts described in the fourth aspect in the reprocessing of automotive interior and exterior trim, consumer electronics exterior parts, and household appliance exterior parts.

[0051] The numerical range described in this invention includes not only the point values ​​listed above, but also any point values ​​within the numerical ranges not listed above. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific point values ​​included in the range.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] The glitter powder imitation flocking dot material provided by this invention includes an aluminum foil and a coating attached to the surface of the aluminum foil. The coating material includes pigments and additives, and the additives include acrylic resin and crosslinking agent in a specific mass ratio. By adding additives of a specific composition to the coating material, the coating adheres firmly to the surface of the aluminum foil, making the resulting glitter powder fiber dot material less prone to discoloration. It can be widely used in the appearance modification of general plastics such as PP, ABS, and HIPS. It has the characteristics of strong contrast, selectable color particle size and shape, and can produce plastic parts with a speckled effect. It can be widely used in industries such as automotive interior and exterior trim, home appliances, and consumer electronics. Attached Figure Description

[0054] Figure 1 This is an actual example of the speckled appearance plastic part provided in Application Example 1;

[0055] Figure 2 This is a physical example of the spotted plastic part provided in Application Example 2. Detailed Implementation

[0056] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0057] Information on some of the raw materials involved in the following specific implementation methods is shown below:

[0058] (A) Acrylic resin B1: Number average molecular weight is 160,000, purchased from Shanghai Bolier Chemical Co., Ltd., brand name is BM218.

[0059] Acrylic resin B2: Number average molecular weight of 220,000, purchased from Shanghai Bolier Chemical Co., Ltd., brand name BM248.

[0060] Acrylic resin B3: Number average molecular weight of 120,000, purchased from DSM (China) Co., Ltd., brand name NeoCryl A-2091.

[0061] (B) Crosslinking agent

[0062] 1,4-Butanediol diacrylate: purchased from Beijing Innocare Technology Co., Ltd., brand name BDDA;

[0063] Epoxy resin amine adduct curing agent: purchased from Huntsman Chemical Trading (Shanghai) Co., Ltd., brand name HY 940.

[0064] (C) Surfactants

[0065] C12-13 linear primary alcohol polyoxyethylene ether: purchased from CNOOC Shell Petrochemicals Co., Ltd., grade NEODOL 23-6.5.

[0066] (D) Resin

[0067] PP resin: purchased from Bora LyondellBasell Petrochemicals Ltd., grade PP EP548R.

[0068] (E) Toner

[0069] Carbon black: purchased from Cabot, grade M717.

[0070] (F) Packing

[0071] Talc powder: purchased from Haicheng Tianyuan Chemical Co., Ltd., brand name TYT-777A.

[0072] (G) Antioxidants

[0073] Antioxidant 1098: Tianjin Lilianlong New Materials Co., Ltd., hindered phenolic antioxidant, brand name RIANOX1098.

[0074] Example 1

[0075] A glitter powder imitation flocking dot material includes an aluminum foil and a coating attached to the surface of the aluminum foil, wherein the coating material includes carbon black and additives.

[0076] The glitter powder imitation flocking dot material contains 99.3% aluminum foil, 0.5% carbon black, and 0.2% additives by mass. The additives include acrylic resin B1, 1,4-butanediol diacrylate, and C12-13 linear primary alcohol polyoxyethylene ether in a mass ratio of 1:0.35:0.065.

[0077] The preparation method of the glitter powder imitation flocking dot material provided in this embodiment includes the following steps:

[0078] (1) Dissolve acrylic resin, 1,4-butanediol diacrylate and C12-13 linear primary alcohol polyoxyethylene ether in methyl ethyl ketone to obtain an additive slurry with a solid content of 55%, and then add bis(p-chlorophenyl)-1,4-dione pyrrolopyrrole to mix to obtain a coating slurry.

[0079] (2) The coating slurry obtained in step (1) is evenly coated onto the aluminum foil using a screen printing machine. After infrared pre-drying and ultraviolet curing, it is cut. The specific process is as follows: infrared drying temperature is 50℃ for 3 minutes, ultraviolet irradiation is 25 seconds, and then it is cut to obtain the glitter powder imitation flocking dot material.

[0080] In this invention, the size of the glitter powder imitation flocking dot material is 0.9mm.

[0081] Example 2

[0082] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the additives include only acrylic resin B1 and 1,4-butanediol diacrylate in a mass ratio of 1:0.35, while the other substances, dosages and preparation methods are the same as in Example 1.

[0083] Example 3

[0084] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the epoxy resin amine adduct curing agent HY940 is used instead of diacrylate-1,4-butanediol ester. In the preparation method, after coating in step (2), it is heated at 50°C for 25 minutes and then cut. Other substances, dosages and preparation methods are the same as in Example 1.

[0085] Example 4

[0086] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the additives include acrylic resin B1, 1,4-butanediol diacrylate and C12-13 linear primary alcohol polyoxyethylene ether in a mass ratio of 1:0.26:0.052. The other substances, dosages and preparation methods are the same as in Example 1.

[0087] Example 5

[0088] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the additives include acrylic resin B1, 1,4-butanediol diacrylate and C12-13 linear primary alcohol polyoxyethylene ether in a mass ratio of 1:0.44:0.078. The other substances, dosages and preparation methods are the same as in Example 1.

[0089] Example 6

[0090] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the additives include acrylic resin B1, 1,4-butanediol diacrylate and C12-13 linear primary alcohol polyoxyethylene ether in a mass ratio of 1:0.35:0.03. The other substances, dosages and preparation methods are the same as in Example 1.

[0091] Example 7

[0092] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the additives include acrylic resin B1, 1,4-butanediol diacrylate and C12-13 linear primary alcohol polyoxyethylene ether in a mass ratio of 1:0.35:0.1. The other substances, dosages and preparation methods are the same as in Example 1.

[0093] Example 8

[0094] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the acrylic resin B1 is replaced with an equal mass of acrylic resin B2, while the other substances, amounts and preparation methods are the same as in Example 1.

[0095] Example 9

[0096] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the acrylic resin B1 is replaced with an equal mass of acrylic resin B3, while the other substances, amounts and preparation methods are the same as in Example 1.

[0097] Comparative Example 1

[0098] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the additives include acrylic resin and C12-13 linear primary alcohol polyoxyethylene ether in a mass ratio of 1:0.065. The other substances, dosages and preparation methods are the same as in Example 1.

[0099] Comparative Example 2

[0100] A glitter powder imitation flocking dot material, which differs from Example 1 only in that epoxy resin (Huntsman's PY 307) is used instead of acrylic resin, and epoxy resin amine adduct curing agent HY940 is used instead of 1,4-butanediol diacrylate. All other substances, dosages and preparation methods are the same as in Example 1.

[0101] Comparative Example 3

[0102] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the additives include acrylic resin, 1,4-butanediol diacrylate and C12-13 linear primary alcohol polyoxyethylene ether in a mass ratio of 1:0.5:0.065. The other substances, dosages and preparation methods are the same as in Example 1.

[0103] Comparative Example 4

[0104] A glitter powder imitation flocking dot material, which differs from Example 1 only in that the additives include acrylic resin, 1,4-butanediol diacrylate and C12-13 linear primary alcohol polyoxyethylene ether in a mass ratio of 1:0.2:0.065. The other substances, dosages and preparation methods are the same as in Example 1.

[0105] Application Examples 1-12 and Comparative Application Examples 1-6

[0106] Application Examples 1-12 and Comparative Application Examples 1-6 each provide a speckled appearance plastic part, the components and amounts of which are contained in the material are shown in Tables 1-3.

[0107] In Tables 1-3, the unit of measurement for each component is "parts by weight".

[0108] Table 1

[0109]

[0110] Table 2

[0111]

[0112] Table 3

[0113]

[0114] The methods for preparing speckled appearance plastic parts provided in Application Examples 1-12 and Comparative Application Examples 1-6 include the following steps:

[0115] (1) Mix 75% of the total resin mass, pigment, filler and antioxidant for 4 min to obtain mixture A; mix the remaining 25% of resin and glitter powder imitation flocking dot material for 3 min to obtain mixture B;

[0116] (2) The mixture A obtained in step (A1) is fed by the main feeder and the mixture B obtained in step (A1) is fed by the side feeder. The mixture is extruded and molded at 220°C using a twin-screw extruder to obtain the spotted plastic part.

[0117] (1) Appearance: Taking Application Example 1 and Comparative Application Example 2 as examples, the spotted plastic parts provided in Application Example 1 and Comparative Application Example 2 were visually observed, and the actual pictures of the spotted plastic parts provided in Application Example 1 and Comparative Application Example 2 are as follows. Figure 1 and Figure 2 As shown.

[0118] from Figure 1 and Figure 2 The comparison shows that: Figure 1 The effect of the glitter powder is very obvious, the distribution is relatively even and orderly, and the aesthetic effect is very beautiful. Figure 2 The glitter dots in the Zhongjin powder are very sparse and unevenly distributed, with virtually no flocking effect.

[0119] (2) Performance testing:

[0120] Color contrast: The degree of color difference between the glitter powder effect dots on the plastic part and the color of the base material. For ease of measurement, a Datacolor Sepctro 1050 colorimeter was used to measure the color data L0, a0, b0 of the color swatch without glitter powder flotation material and the color data L1, a1, b1 of the area of ​​the plastic part after adding glitter powder flotation material. The color contrast was characterized by the color difference ΔE before and after. The larger the ΔE value, the greater the contrast and the better the glitter powder flotation effect. The specific algorithm is shown in the following formula.

[0121]

[0122] in , , .

[0123] The test results were obtained by testing the plastic parts with speckled appearance provided in Test Cases 1-12 and Comparative Application Examples 1-6 according to the above test methods. Table 4 shows the test results:

[0124] Table 4

[0125]

[0126] According to the data in Table 4, the color contrast of the plastic parts with speckled appearance, including the glitter powder imitation flocking dot material, is greater than 8.

[0127] The color contrast of glitter powder is mainly related to the dosage of crosslinking agent, surfactant, and glitter powder imitation flocking dot material. Comparing Application Examples 1, 2, 3, and 4, it can be seen that the color contrast of glitter powder is not positively correlated with the dosage. As the dosage of glitter powder imitation flocking dot material increases, the color contrast first increases and then decreases, with the optimal dosage being 0.0015%. Comparing Application Examples 3 and 6, it can be seen that among crosslinking agents, 1,4-butanediol diacrylate is superior to epoxy resin amine adduct curing agent HY940. Comparing Application Example 3, Comparative Application Example 3, and Comparative Application Example 4, it can be seen that too much or too little crosslinking agent affects the color contrast. The optimal ratio of acrylic resin to 1,4-butanediol diacrylate is 1:0.35. Comparative applications 3, 5, 9, and 10 show that both excessive and insufficient surfactant content affect color contrast, and the optimal ratio of acrylic resin to 1,4-butanediol diacrylate is 1:0.065. Comparative applications 3, 11, and 12 show that both excessively large and excessively small molecular weight of acrylic acid affect color contrast, with a preferred molecular weight of 130,000-190,000. Comparative applications 3 and 5, 6 show that the amount of carbon black also affects color contrast; both excessive and insufficient amounts are undesirable, with an optimal amount of 0.005%.

[0128] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A glitter powder imitation flocking dot material, characterized in that, The glitter powder imitation flocking dot material includes aluminum foil and a coating attached to the surface of the aluminum foil; The coating material includes pigments and additives; The additives include acrylic resin and crosslinking agent; The mass ratio of the acrylic resin to the crosslinking agent is 1:(0.25~0.45).

2. The glitter powder imitation flocking dot material according to claim 1, characterized in that, The aluminum foil content in the glitter powder imitation flocking dot material is 99-99.6% by mass. Preferably, the pigment content in the glitter powder imitation flocking dot material is 0.2% to 0.5% by mass; Preferably, the pigment includes any one or a combination of at least two of titanium dioxide, bis(p-chlorophenyl)-1,4-dione pyrrolopyrrole, phthalocyanine blue 15:3, or 2-(3-hydroxy-2-quinolinyl)-1,3-indanedione.

3. The glitter powder imitation flocking dot material according to claim 1 or 2, characterized in that, The number average molecular weight of the acrylic resin is 50,000 to 230,000, more preferably 130,000 to 190,000; Preferably, the crosslinking agent includes amine crosslinking agents and / or acrylate crosslinking agents, and more preferably acrylate crosslinking agents; Preferably, the acrylate crosslinking agent includes 1,4-butanediol diacrylate; Preferably, the amine crosslinking agent includes an epoxy resin amine adduct curing agent; Preferably, the additive further includes a surfactant; Preferably, the mass ratio of the acrylic resin to the surfactant is 1:(0.05~0.08); Preferably, the surfactant includes a nonionic surfactant; Preferably, the nonionic surfactant comprises C12-13 linear primary alcohol polyoxyethylene ether.

4. A method for preparing a glitter powder-based flocking dot material according to any one of claims 1 to 3, characterized in that, The preparation method includes the following steps: (1) Dissolve acrylic resin, crosslinking agent and optionally surfactant in solvent to obtain additive slurry, then add pigment to the obtained additive slurry and mix to obtain coating slurry; (2) The coating slurry obtained in step (1) is coated on the surface of aluminum foil, cured and cut to obtain the glitter powder imitation flocking dot material.

5. The preparation method according to claim 4, characterized in that, The solid content of the additive slurry is 50-60%; Preferably, the solvent includes ketone solvents and / or alcohol solvents.

6. A speckled-appearance plastic part, characterized in that, The material of the speckled appearance plastic part comprises the following components by weight: 75-85 parts resin, 0.002-0.008 parts color powder, 0.0005-0.002 parts glitter powder imitation flocking dot material as described in any one of claims 1-3, and 10-30 parts filler.

7. The speckled appearance plastic part according to claim 6, characterized in that, The resin includes any one or a combination of at least two of PP resin, ABS resin, or HIPS resin. Preferably, the pigment includes carbon black; Preferably, the filler includes at least one of talc, barium sulfate, or calcium carbonate; Preferably, the material of the speckled appearance plastic part further includes an antioxidant; Preferably, the antioxidant content in the material of the spotted plastic part is 0.0005~0.002 parts by weight.

8. A method for preparing a speckled appearance plastic part as described in claim 6 or 7, characterized in that, The preparation method includes the following steps: (A1) A portion of the resin, pigment, filler, and optionally antioxidant are mixed to obtain mixture A; the remaining portion of the resin is mixed with the glitter powder imitation flocking dot material as described in any one of claims 1 to 3 to obtain mixture B; (A2) The mixture A obtained in step (A1) is fed by the main feeder and the mixture B obtained in step (A1) is fed by the side feeder. The mixture is then extruded using a twin-screw extruder to obtain the spotted plastic part.

9. The preparation method according to claim 8, characterized in that, The resin described in step (A1) accounts for 70-80% of the total mass of all resins; Preferably, the mixing time for mixing a portion of the resin, color powder, filler and optionally antioxidant in step (A1) is 3 to 5 minutes; Preferably, the mixing time for mixing the remaining resin and the glitter powder imitation flocking dot material as described in any one of claims 1 to 3 in step (A2) is 3 to 5 minutes; Preferably, the extrusion molding temperature in step (A2) is 200~230°C.

10. The use of a speckled appearance plastic part as described in claim 7 or 8 in automotive interior and exterior trim, consumer electronics exterior parts, or home appliance exterior parts.

Images