201144392 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種塗料，且特別是有關於一種單液 型塗料與高光澤塗層之形成方法。 【先前技術】 目前市面上的3C產品，為了提高產品外觀（一般為塑 膠外殼）的質感，通常要求產品之光澤度要達到光澤度計6〇 • 度角之反射率大於85 % ’以符合市場之需求。 目前已知提高物品光澤度之方法包括以下方式：模具 拋光、喷塗UV塗料或雙液型塗料，其中模具拋光或噴塗 UV塗料皆須額外搭配機台，因而提高製程的成本。而雙液 型的塗料需要加入硬化劑（例如醇類或胺類）幫助塗料硬 化，一般而έ，雙液型塗料之熟化時間（cure time)通常需要 三天以上’提高時間成本且不利生產。 綜上所述’業界亟需發展一種高光澤度塗料，其不但 ® 能節省製程成本、縮短熟化時間。 【發明内容】 本發明提供一種水性單液型塗料，包括：40〜80重量份 (parts by weight)之水性壓克力樹脂（aqueous acrylic resin); 5〜15重量份之顏料；0.1〜3重量份之塗料助劑；以及3〜15 重量份之成膜助劑。 本發明亦提供一種高光澤塗層之形成方法，包括以下 步驟：將本發明所述之單液型塗料喷塗於一物件上；以及 PWHQ-PR-0005-TWXX/0809-A42396-TW/fmal/ 201144392 烘烤該單液型塗料以形成一高光澤塗層。 為讓本發明之上述和其他目的、特徵、和優點能更明 顯易僅，下文特舉出較佳實施例，並配合所附圖式，作詳 細說明如下： 【實施方式】 本發明提供一種水性單液型塗料，其主要包括40〜80 重量份(parts by weight)之水性壓克力樹脂（aqUeous acrylic resin)本發明之水性壓克力樹脂是以丙稀基(acryiic 的化合物為主的合成樹脂，為一種水分散型或改性壓克力 乳化樹脂(modify-emulsified resin)，其結構中包括壓克力_ 苯乙烯或壓克力-二氧化矽（silica)之結構，且其分子量為約 大於100,000’較佳為約100,000〜25〇,〇〇〇。此處所謂之「改 性壓克力乳化樹脂」係指壓克力樹脂之結構中能與環氧樹 脂(ePoxy)或聚氨S旨樹脂(polyurethane, PU)產生鍵結。 此外’水性單液型塗料包括以下成份：5〜15重量份之 顏料；0.1〜3重量份之塗料助劑；以及3〜15重量份之成膜 助劑。上述之顏料包括紅、白、黑、藍或黃等顏料，用以 讓塗料形成各種所需之顏色，以增加水性單液型塗料之視 覺效果。 上述之塗料助劑包括流平劑（slip and leveling agent)、 消泡劑（defoamer)或分散劑(dispersant)，其中流平劑可使水 性單液型塗料成膜時具有良好的平整性，消泡劑用以消除 塗料形成之氣泡。而分散劑可以幫助各成分均勻地混合於 PWHQ-PR-0005-TWXX/0809-A42396-TW/fmal/ 4 201144392 水性單液型塗料中，降低各成分之間的界面張力。可使用 之流平劑’例如市售之BYK 346 ;可使用之消泡劑，例如 市售之TEGO foamex 805 ;可使用之分散劑，例如市售之 BYK 192。201144392 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a coating, and more particularly to a method for forming a single liquid coating and a high gloss coating. [Prior Art] At present, 3C products on the market, in order to improve the appearance of the product (usually a plastic case), usually require the gloss of the product to reach a gloss of 6 〇 • degree angle of reflectance greater than 85% 'in order to meet the market Demand. Currently known methods for improving the gloss of articles include the following methods: mold polishing, spray coating of UV coatings or two-component coatings, wherein the mold polishing or spraying of UV coatings requires an additional matching of the machine, thereby increasing the cost of the process. Two-liquid type coatings require the addition of a hardener (such as an alcohol or an amine) to help harden the coating. Generally, the cure time of a two-liquid type coating usually takes more than three days to increase the time cost and disadvantageous production. In summary, there is an urgent need to develop a high-gloss coating that not only saves process costs but also shortens the curing time. SUMMARY OF THE INVENTION The present invention provides an aqueous one-liquid type coating comprising: 40 to 80 parts by weight of aqueous acrylic resin; 5 to 15 parts by weight of pigment; 0.1 to 3 weight a coating aid; and 3 to 15 parts by weight of a filming aid. The present invention also provides a method for forming a high gloss coating comprising the steps of: spraying a single liquid type coating of the present invention onto an object; and PWHQ-PR-0005-TWXX/0809-A42396-TW/fmal / 201144392 Baking the one-component coating to form a high gloss coating. The above and other objects, features, and advantages of the present invention will become more apparent and obvious. Single-liquid type coating, which mainly comprises 40 to 80 parts by weight of aqueous acrylic resin (aqUeous acrylic resin). The aqueous acrylic resin of the present invention is an acryl-based (acryiic compound-based synthesis). The resin is a water-dispersible or modified acrylic-modified resin comprising a structure of acrylic styrene or acrylic-silic oxide, and its molecular weight is It is preferably about 100,000 〜25 〇, 〇〇〇. The so-called "modified acrylic emulsified resin" refers to the structure of acrylic resin and epoxy resin (ePoxy) or polyurethane. S is a resin (PU) to produce a bond. In addition, the 'aqueous single-liquid type coating includes the following components: 5 to 15 parts by weight of the pigment; 0.1 to 3 parts by weight of the coating aid; and 3 to 15 parts by weight of the film. Additives. The above pigments include Pigments such as white, black, blue or yellow are used to form the desired color of the coating to increase the visual effect of the aqueous one-liquid coating. The above coating additives include slip and leveling agents, Defoamer or dispersant, wherein the leveling agent can make the aqueous single-liquid type coating have good flatness when formed into a film, and the defoaming agent can eliminate the bubbles formed by the coating. The dispersing agent can help the ingredients. Evenly mixed with PWHQ-PR-0005-TWXX/0809-A42396-TW/fmal/ 4 201144392 In aqueous single-liquid coatings, reduce the interfacial tension between the components. Can be used as a leveling agent' such as commercially available BYK 346; defoamers which can be used, such as the commercially available TEGO foamex 805; dispersants which can be used, such as the commercially available BYK 192.
上述之成膜助劑為一種共溶劑（cosolvent)，其包括醚醇 類（ether alcohol)、酸酯類（acid ester)或上述之組合，其作用 在於幫助水性壓克力樹脂與其他成份均勻地混合，以幫助 塗料成膜。可使用之成膜助劑，例如市售之TEXANOL (伊 鲁 士 曼科達）、AN0LPph (陶氏化學，Dow Chemical)、DBE-IB (杜邦）、DPnB(陶氏化學，Dow Chemical)等。 此外，除上述之成分外，尚可添加一稀釋劑，例如水， 用以調整水性單液型塗料之黏度，使水性單液型塗料由岩 田黏度杯#2測定之黏度為約8〜10秒，較佳為8.5〜9.5秒。 由於水性壓克力樹脂本身會具有不同之含水量，進而影響 水性單液型塗料之黏度，因此，可藉由額外添加之稀釋劑 (例如’水）調整整體水性單液型塗料之黏度。 為了挺南本發明之水性單液型塗料之穩定性 (stability) ’可添加具有胺基(amine)之化合物至塗料中，使 水性單液型塗料之pH値呈現微驗，pH値為約8.〇_9.5，使 其能長期保存於室溫下，其中具有胺基之化合物，例如氨 水、一級胺(primary amine)、二級胺（sec〇ndary amine)或三 級胺（tertiary amine) 〇 於一實施中，可使用市售之AMP_90或AMP_95(陶氏 化學，Dow Chemical)、二甲基乙醇胺、二乙基乙醇胺等具 有胺基之化合物，以調整水性單液型塗料之pH値。 PWHQ-PR-〇〇〇5-TWXX/0809-A42396-TW/fmal/ 5 201144392 本發明之水性單液型塗料中的各成分之混合順序並無 特別限定’只要能將各成份均勻混合即可，因此，可藉由 機械授拌方式幫助各成份之混合。由於水性壓克力樹脂佔 水性單液型塗料之含量較高，為了使塗料中各成分混合均 勻’於-較佳之實施例中，可先混合顏料、塗料助劑與成 膜助劑’最後再加入水性壓克力樹脂。 本發明亦提供一種高光澤塗層之形成方法，此方法包 括以下步驟：將上述提及之單液型塗料喷塗（sprayc〇ating) 於一物件上，以及烘烤單液型塗料以形成一高光澤塗層。 上述之物件包括電子產品之塑膠外殼，例如丙烯晴_丁二烯 -苯乙烯（acrylonitrile butadiene styrene，ABS)、聚苯乙烯 (polystyrene，PS)、聚碳酸醋（p〇lycarb_te，pc)、聚氯乙烯 (polyvinylchloride，PVC)等塑膠。 上述烘烤之溫度為約40〇C〜1〇〇。(：，烘烤之溫度會依據 塗料喷塗之物件不同而作調整。於一實施例中，當物件為 丙烯晴-丁二烯··苯乙烯(ABS)、聚碳酸酯/丙烯晴_丁二烯_苯 乙烯(PC/ABS)時，烘烤溫度為約4〇艺〜6〇。〇，較佳為約5〇 C〜60 C。於另一實施例中，當物件為聚碳酸酯（pc)時，烘 烤溫度為約65°C〜100°C，較佳為約7〇°c〜80°C。 而烘烤之時間為約0.5小時〜1小時並靜置48小時，或 者以強制乾燥烘烤4〜8小時，經過上述烘烤後，可使塗料 中溶劑揮發後，即可得到高光澤塗層。此處需注意的是， 此f所謂之，，強制乾燥，，係將烘烤時間一次加長，以使反應 提則達成，但由於基材喷塗之物件為成型塑膠，因此溫度 僅就較佳烘烤溫度之上限為主，不須再提高溫度。 PWHQ-PR-〇〇〇5-TWXX/〇809-A42396-TW/fmal/ 6 201144392 上述之高光澤塗層之厚度為約12〜25 μιη，以使塗層 具有遮蔽效果，且其具有60度視角之反射率為約85 %〜 100 %之光澤度，達到高光澤度之標準。 此處須注意的是，本發明之水性單液型塗料主要以水 性壓克力樹脂為主，相對於其他油性塗料，更容易製備且 更符合環保需求。此外，相對於一般的雙液型塗料，本發 明之水性單液型塗料不需要額外添加硬化劑（curing agent)，且只需要藉由簡單的熱烘烤方式，即可製得具有高 光澤度之塗層，因此能節省製程成本與縮短製程時間。 【實施例】 實施例1 取7克顏料溶於10克共溶劑及10克純水，靜置4小 時以上或連續攪拌1小時以上。 之後，取0.6克流平助劑，再倒入20克純水置於另一 杯中，機械攪拌5分鐘，再倒入50克水性壓克力樹脂，機 械攪拌15分鐘，將此混合物倒入顏料混合液中，再攪拌 30分鐘，最後再以AMP-90調整系統PH達8.0〜9.5，此時 再加入純水調整整體黏度達岩田#2杯之量測黏度在8.5秒 〜9.5秒。 最後，將上述配置之塗料喷塗於塑膠外殼上，乾膜厚 度12〜25 μιη、烘烤條件為60°C/30分鐘，靜置48小時進行 測試。以德國畢克(BYK)化學所售之光澤度計測量，其60 度視角之反射率為約90 %。 實施例2 PWHQ-PR-0005-TWXX/0809-A42396-TW/fmay 7 201144392 取10克顏料溶於10克共溶劑及10克純水，靜置4小 時以上或連續攪拌1小時以上。 之後，取0.6克分散劑，再倒入20克純水置於另一杯 中，機械攪拌5分鐘，再倒入50克水性壓克力樹脂，機械 檀拌15分鐘，將此混合物倒入顏料混合液中，再擾拌30 分鐘，最後再以AMP-90調整系統PH達8.0〜9.5，此時再 加入純水調整整體黏度達岩田#2杯之量測黏度在8.5秒 〜9.5秒。 最後，將上述配置之塗料喷塗於塑膠外殼上，乾膜厚 度12〜25 μηι、烘烤條件為60°C/30分鐘，靜置48小時進行 測試。以德國畢克(BYK)化學所售之光澤度計測量，其60 度視角之反射率為約88 %。 實施例3 取8克顏料溶於8克共溶劑及10克純水，靜置4小時 以上或連續攪拌1小時以上。 之後，取0.3克流平助劑，再倒入20克純水置於另一 杯中，機械攪拌5分鐘，再倒入50克水性壓克力樹脂，機 械檀拌15分鐘，將此混合物倒入顏料混合液中，再擾拌 30分鐘，最後再以AMP-90調整系統PH達8.0〜9.5，此時 再加入純水調整整體黏度達岩田#2杯之量測黏度在8.5秒 〜9.5秒。 最後，將上述配置之塗料喷塗於塑膠外殼上，乾膜厚 度12〜25 μηι、烘烤條件為60°C/30分鐘，靜置48小時進行 測試。以德國畢克(BYK)化學所售之光澤度計測量，其60 PWHQ-PR-0005-TWXX/0809-A42396-TW/fmal/ 8 201144392 度視角之反射率為約90 % 雖然本發明已以數個較佳實施例揭露如上，然其並非 用以限定本發明，任何所屬技術領域中具有通常知識者， 在不脫離本發明之精神和範圍内，當可作任意之更動與潤 飾，因此本發明之保護範圍當視後附之申請專利範圍所界 定者為準。 【圖式簡單說明】 無 【主要元件符號說明】 無 PWHQ-PR-0005-TWXX/0809-A42396-TW/fmal/The above-mentioned coalescent is a cosolvent comprising an ether alcohol, an acid ester or a combination thereof, which serves to help the aqueous acrylic resin and other components to be evenly distributed. Mix to help coat the film. Film-forming auxiliaries which can be used, such as commercially available TEXANOL (Iron Mancoda), AN0LPph (Dow Chemical, Dow Chemical), DBE-IB (DuPont), DPnB (Dow Chemical), and the like. In addition, in addition to the above components, a diluent such as water may be added to adjust the viscosity of the aqueous single-liquid type coating, so that the viscosity of the aqueous single-liquid type coating is determined by Iwata viscosity cup #2 to be about 8 to 10 seconds. Preferably, it is 8.5 to 9.5 seconds. Since the aqueous acrylic resin itself has a different water content, which in turn affects the viscosity of the aqueous one-liquid type coating, the viscosity of the overall aqueous one-liquid type coating can be adjusted by an additional diluent (e.g., 'water). In order to stabilize the stability of the aqueous single-liquid type coating of the present invention, a compound having an amine compound may be added to the coating to make the pH of the aqueous single-liquid type coating exhibit a micro-test, and the pH 値 is about 8 〇 9.5, which allows it to be stored at room temperature for a long period of time, in which an amine group compound such as ammonia, primary amine, sec〇ndary amine or tertiary amine 〇 In one embodiment, a commercially available compound such as AMP_90 or AMP_95 (Dow Chemical), dimethylethanolamine or diethylethanolamine may be used to adjust the pH of the aqueous one-liquid type coating. PWHQ-PR-〇〇〇5-TWXX/0809-A42396-TW/fmal/ 5 201144392 The order of mixing the components in the aqueous one-component coating of the present invention is not particularly limited as long as the components can be uniformly mixed. Therefore, the mixing of the ingredients can be assisted by mechanical mixing. Since the aqueous acrylic resin accounts for a high content of the aqueous single-liquid type coating, in order to uniformly mix the components in the coating, in the preferred embodiment, the pigment, the coating aid and the film-forming auxiliary agent may be mixed first. Aqueous acrylic resin is added. The invention also provides a method for forming a high gloss coating, the method comprising the steps of: spraying the above-mentioned single liquid type coating onto an object, and baking the single liquid type coating to form a High gloss coating. The above-mentioned articles include a plastic outer casing of an electronic product, such as acrylonitrile butadiene styrene (ABS), polystyrene (PS), polycarbonate (p〇lycarb_te, pc), polychlorinated chlorine. Plastics such as vinyl chloride (PVC). The above baking temperature is about 40 〇C~1〇〇. (: The baking temperature will be adjusted according to the different materials sprayed by the paint. In one embodiment, when the object is acrylonitrile-butadiene styrene (ABS), polycarbonate/acrylonitrile-butyl In the case of diene-styrene (PC/ABS), the baking temperature is about 4 〜 to 6 〇. 〇, preferably about 5 〇 C to 60 C. In another embodiment, when the article is polycarbonate In the case of (pc), the baking temperature is about 65 ° C to 100 ° C, preferably about 7 ° C to 80 ° C. The baking time is about 0.5 hour to 1 hour and is allowed to stand for 48 hours, or Forcibly dry and bake for 4 to 8 hours. After the above baking, the solvent in the coating can be volatilized to obtain a high gloss coating. Here, it should be noted that this f is called, forced drying, The baking time is lengthened once, so that the reaction is reached, but since the object sprayed on the substrate is a molded plastic, the temperature is only the upper limit of the preferred baking temperature, and the temperature is not required to be raised. PWHQ-PR- 〇〇〇5-TWXX/〇809-A42396-TW/fmal/ 6 201144392 The thickness of the high-gloss coating described above is about 12~25 μηη, so that the coating has a shielding effect, and The reflectance with a viewing angle of 60 degrees is about 85% to 100% gloss, and the standard of high gloss is achieved. It should be noted here that the aqueous single liquid coating of the present invention is mainly based on aqueous acrylic resin. Compared with other oil-based paints, it is easier to prepare and more environmentally friendly. In addition, compared with the general two-liquid type coating, the aqueous single-liquid type coating of the present invention does not need to additionally add a curing agent, and only needs to be A simple hot baking method can produce a coating with high gloss, thereby saving process cost and shortening process time. [Examples] Example 1 7 g of pigment is dissolved in 10 g of cosolvent and 10 g of pure Water, let stand for more than 4 hours or continuously stir for more than 1 hour. After that, take 0.6 g of leveling aid, then pour 20 g of pure water into another cup, mechanically stir for 5 minutes, then pour 50 g of water-based acrylic Resin, mechanically stir for 15 minutes, pour the mixture into the pigment mixture, stir for another 30 minutes, and finally adjust the system pH to 8.0~9.5 with AMP-90. At this time, add pure water to adjust the overall viscosity to Iwata #2 cup. Measuring viscosity 8.5 seconds to 9.5 seconds. Finally, the coating of the above configuration is sprayed on a plastic case with a dry film thickness of 12 to 25 μm, a baking condition of 60 ° C / 30 minutes, and allowed to stand for 48 hours for testing. (BYK) Chemicals sold by a gloss meter with a reflectance of about 90% from a 60 degree viewing angle. Example 2 PWHQ-PR-0005-TWXX/0809-A42396-TW/fmay 7 201144392 Take 10 grams of pigment dissolved 10 g of co-solvent and 10 g of pure water, allowed to stand for 4 hours or more or continuously stirred for more than 1 hour. After that, take 0.6 g of dispersant, pour 20 g of pure water into another cup, mechanically stir for 5 minutes, then pour 50 g of water-based acrylic resin, mechanical sandalwood for 15 minutes, pour the mixture into the pigment mixture. In the liquid, stir again for 30 minutes, and finally adjust the system pH to 8.0~9.5 with AMP-90. At this time, add pure water to adjust the overall viscosity. The measured viscosity of Iwata #2 cup is 8.5 seconds to 9.5 seconds. Finally, the coating of the above configuration was sprayed on a plastic case with a dry film thickness of 12 to 25 μm, a baking condition of 60 ° C / 30 minutes, and allowed to stand for 48 hours for testing. The reflectance at a 60 degree viewing angle was about 88% as measured by a gloss meter sold by BYK Chemicals. Example 3 8 g of a pigment was dissolved in 8 g of a cosolvent and 10 g of pure water, allowed to stand for 4 hours or more, or continuously stirred for 1 hour or more. After that, take 0.3 g of leveling aid, then pour 20 g of pure water into another cup, mechanically stir for 5 minutes, then pour 50 g of water-based acrylic resin, mechanical sandalwood for 15 minutes, pour the mixture into the pigment. In the mixture, stir again for 30 minutes, and finally adjust the system pH to 8.0~9.5 with AMP-90. At this time, add pure water to adjust the overall viscosity. The measured viscosity of #2 cup of Iwata is 8.5 seconds to 9.5 seconds. Finally, the coating of the above configuration was sprayed on a plastic case with a dry film thickness of 12 to 25 μm, a baking condition of 60 ° C / 30 minutes, and allowed to stand for 48 hours for testing. Measured by a gloss meter sold by BYK Chemicals, the reflectance of 60 PWHQ-PR-0005-TWXX/0809-A42396-TW/fmal/ 8 201144392 degrees of view is about 90%. The preferred embodiments are disclosed above, but are not intended to limit the invention, and any one of ordinary skill in the art can make any changes and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. [Simple description of the diagram] None [Key component symbol description] None PWHQ-PR-0005-TWXX/0809-A42396-TW/fmal/