CN106076786A - 一种抗菌铝型材喷涂工艺 - Google Patents

一种抗菌铝型材喷涂工艺 Download PDF

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CN106076786A
CN106076786A CN201610608905.6A CN201610608905A CN106076786A CN 106076786 A CN106076786 A CN 106076786A CN 201610608905 A CN201610608905 A CN 201610608905A CN 106076786 A CN106076786 A CN 106076786A
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Abstract

本发明公开了一种抗菌铝型材喷涂工艺,包括以下步骤:(1)酸洗;(2)碱洗;(3)水洗;(4)阳极氧化;(5)喷涂;(6)固化。本发明抗菌铝型材喷涂工艺,步骤简单,施工方便,施工效率高,喷涂后的铝型材具有良好的抗菌性能和抗静电性能,涂层附着紧密,感官效果好,具有长久的耐候性能,使用寿命长。

Description

一种抗菌铝型材喷涂工艺
技术领域
本发明涉及铝型材料技术领域,尤其涉及一种抗菌铝型材喷涂工艺。
背景技术
金属型材以其优异的耐久性、装饰性和加工成型性的特点,广泛应用于建筑物的各个方面。而铝型材因其加工性能佳、质轻等特点,用量占金属型材的80%以上。铝型材作为铝加工材的主要品种之一,以其独特的装饰性、优良的隔音、保温及可回收性广泛应用于建筑领域,而又凭借其一次挤压成型及较高的机械物理性能、良好的导热性能及较高的比强度等优点,被愈来愈广泛地用于交通运输、电子、机械、轻工、石油、化工、航空、航天等领域。
为了使铝型材具有更好的性能,通常需要对铝型材进行喷涂。喷涂工艺的好坏,直接影响着涂层的附着力、外观、涂层的耐潮湿及耐腐蚀等方面,因最好的涂膜都是粘附到被认真清理的表面。以前的铝型材喷涂工艺不但步序繁琐,加工出来的铝板表面的漆面还不平整,达不到客户的要求,视觉效果欠佳,有待改进。
本发明提供了一种抗菌铝型材喷涂工艺,操作简单,抗菌性能好。
发明内容
针对现有技术中存在的上述不足,本发明所要解决的技术问题是提供一种抗菌铝型材喷涂工艺。
本发明目的是通过如下技术方案实现的:
一种抗菌铝型材喷涂工艺,包括以下步骤:
(1)酸洗:将铝型材置于质量分数为75-85%的磷酸溶液中浸泡5-10min,除去铝型材表面的油脂;
(2)碱洗:常温下,将酸洗过的铝型材放入入0.5-1.5mol/L碳酸钠溶液中浸泡5-10min;
(3)水洗:用水清洗铝型材表面;
(4)阳极氧化:将水洗后的铝型材置于质量浓度95-99%的硫酸溶液中作为阳极,用外加电流使阳极氧化,使铝型材表面钝化,形成8-16μm厚度的氧化膜,取出铝型材,用水冲洗铝型材表面;
(5)喷涂:干燥后,将防污漆在铝型材表面采用喷涂、滚涂和/或刷涂方式均匀涂抹,得到漆膜,漆膜厚度为8-12μm;
(6)固化:在温度为180-220℃的烘箱内烘烤20-30min后,自然冷却。
所述的步骤(5)中防污漆由下述重量份的原料制备而成:丙烯酸树脂38-42份、氯醋树脂5-15份、异佛尔酮二异氰酸酯5-10份、甲基异丁基甲酮25-35份、0.5-3份、二氧化硅2-4份、2,2,4-三甲基-1,3-戊二醇单异丁酸酯1-2份、无机抗菌剂1-5份、抗静电剂0.5-1.5份。
优选地,所述的无机抗菌剂由磷酸锆、钛酸镁、铌酸镁混合而成,所述磷酸锆、钛酸镁、铌酸镁的质量比为(1-3):(1-3):(1-3)。
优选地,所述的抗静电剂由双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵混合而成,所述双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵的质量比为(1-3):(1-3):(1-3)。
优选地,所述的丙烯酸树脂,可以购买或制备得到,如购买自安吉恒悦化工贸易有限公司的牌号为JSMI-100的聚氨酯丙烯酸树脂,也可以参照专利申请号:201310087629.X中实施例1的方法制备。
本发明铝型材喷涂工艺步骤简单,加工方便,施工效率高,喷涂后的铝型材具有良好的抗菌性能和抗静电性能,涂层附着紧密,感官效果好,具有长久的耐候性能,使用寿命长。
具体实施方式
实施例中各原料介绍:
丙烯酸树脂,参照专利申请号:201310087629.X中实施例1的方法制备。
氯醋树脂,采用日本信越型号为SOLBIN A的三元氯醋树脂。
异佛尔酮二异氰酸酯,CAS号:4098-71-9。
甲基异丁基甲酮,CAS号:108-10-1。
二氧化硅,CAS号:7631-86-9,粒径20-40nm。
2,2,4-三甲基-1,3-戊二醇单异丁酸酯,CAS号:25265-77-4。
磷酸锆,CAS号:13772-29-7,粒径20-40nm。
钛酸镁,CAS号:12032-35-8,粒径20-40nm。
铌酸镁,CAS号:12163-26-7,粒径20-40nm。
双十八烷基甲基叔胺,CAS号:4088-22-6。
十八烷基甲基二羟乙基溴化铵,CAS号:97508-23-1。
十二烷基三甲基溴化铵,CAS号:1119-94-4。
铝型材,参照专利申请号:201310176055.3中实施例1的方法制备,厚度为5mm。
实施例1
铝型材喷涂工艺,包括以下步骤:
(1)酸洗:将铝型材置于温度为25℃、质量分数为80%的磷酸溶液(即磷酸水溶液,其中磷酸的质量分数为80%)中浸泡8min,除去铝型材表面的油脂;
(2)碱洗:常温下,将酸洗过的铝型材放入1mol/L碳酸钠溶液(即碳酸钠水溶液,其中碳酸钠的摩尔浓度为1mol/L)中浸泡8min;
(3)水洗:用水清洗铝型材表面;
(4)阳极氧化:将水洗后的铝型材置于质量浓度98%的硫酸溶液(即硫酸水溶液,其中硫酸的质量分数为98%)中作为阳极,用外加电流使阳极氧化,使铝型材表面钝化,形成10μm厚度的氧化膜,取出铝型材,用水冲洗铝型材表面;
(5)喷涂:待铝型材表面干燥后,在铝型材表面均匀喷涂防污漆,喷淋压力为0.05Mpa,得到漆膜,漆膜厚度为10μm;
(6)固化:将喷涂后的铝型材在温度为180℃的烘箱内烘烤25min后,自然冷却。
所述的步骤(5)中防污漆由下述重量份的原料制备而成:丙烯酸树脂40份、氯醋树脂6份、异佛尔酮二异氰酸酯8份、甲基异丁基甲酮30份、二氧化硅3份、2,2,4-三甲基-1,3-戊二醇单异丁酸酯1.5份、无机抗菌剂3份、抗静电剂0.9份。
所述的无机抗菌剂由磷酸锆、钛酸镁、铌酸镁按质量比为1:1:1搅拌混合均匀得到。
所述的抗静电剂由双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵按质量比为1:1:1搅拌混合均匀得到。
防污漆制备:将丙烯酸树脂、氯醋树脂加入到甲基异丁基甲酮中,以转速为700转/分搅拌40分钟,然后加入异佛尔酮二异氰酸酯以转速为700转/分搅拌5分钟,再加入2,2,4-三甲基-1,3-戊二醇单异丁酸酯以转速为700转/分搅拌5分钟,最后加入二氧化硅、无机抗菌剂、抗静电剂以转速为700转/分搅拌10分钟混合均匀即得。
实施例2
与实施例1基本相同,区别仅在于:所述的无机抗菌剂由钛酸镁、铌酸镁按质量比为1:1搅拌混合均匀得到。
实施例3
与实施例1基本相同,区别仅在于:所述的无机抗菌剂由磷酸锆、铌酸镁按质量比为1:1搅拌混合均匀得到。
实施例4
与实施例1基本相同,区别仅在于:所述的无机抗菌剂由磷酸锆、钛酸镁按质量比为1:1搅拌混合均匀得到。
实施例5
与实施例1基本相同,区别仅在于:所述的抗静电剂由十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵按质量比为1:1搅拌混合均匀得到。
实施例6
与实施例1基本相同,区别仅在于:所述的抗静电剂由双十八烷基甲基叔胺、十二烷基三甲基溴化铵按质量比为1:1搅拌混合均匀得到。
实施例7
与实施例1基本相同,区别仅在于:所述的抗静电剂由双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵按质量比为1:1搅拌混合均匀得到。
测试例1
对实施例1-7制备得到的防污漆的抗菌性能进行测试,抗菌性能按GB/T21866-2008抗菌涂料抗菌性能测定方法和抗菌效果、HG/T 3980-2007抗菌涂料测定,检测项目为抗菌测试和防霉测试。
抗菌测试:大肠杆菌ATYCC 25922、金黄色葡萄球菌ATCC 6538。
具体测试结果见表1:
表1:防污漆抗菌性能测试数据单位:%
大肠杆菌杀菌率 金黄色葡萄球菌杀菌率
实施例1 99.99 99.99
实施例2 97.88 98.06
实施例3 97.65 97.79
实施例4 98.13 98.12
实施例5 97.58 97.51
实施例6 97.63 97.58
实施例7 98.18 97.92
比较实施例1与实施例2-4,在无机抗菌剂加入总量相同的情况下,实施例1(磷酸锆、钛酸镁、铌酸镁复配)防污漆的抗菌性能明显优于实施例2-4(磷酸锆、钛酸镁、铌酸镁中任意二者复配)。比较实施例1与实施例5-7,在抗静电剂加入总量相同的情况下,实施例1(双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵复配)防污漆的抗菌性能明显优于实施例5-7(双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵中任意二者复配)。
测试例2
将实施例1-7得到的铝型材表面的漆膜进行抗静电性能测试。漆膜的表面电阻用上海第六电表厂生产的ZC36型超高型电阻仪测定。具体结果见表2。
表2:抗静电性能测试结果表单位:Ω
表面电阻
实施例1 1.7×108
实施例2 4.4×108
实施例3 4.5×108
实施例4 4.1×108
实施例5 5.3×108
实施例6 4.8×108
实施例7 4.9×108
比较实施例1与实施例2-4,在无机抗菌剂加入总量相同的情况下,实施例1(磷酸锆、钛酸镁、铌酸镁复配)抗静电性能明显优于实施例2-4(磷酸锆、钛酸镁、铌酸镁中任意二者复配)。比较实施例1与实施例5-7,在抗静电剂加入总量相同的情况下,实施例1(双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵复配)抗静电性能明显优于实施例5-7(双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵中任意二者复配)。

Claims (1)

1.一种抗菌铝型材喷涂工艺,其特征在于,一种抗菌铝型材喷涂工艺,包括以下步骤:
(1)酸洗:将铝型材置于质量分数为75-85%的磷酸溶液中浸泡5-10min,除去铝型材表面的油脂;
(2)碱洗:常温下,将酸洗过的铝型材放入0.5-1.5mol/L碳酸钠溶液中浸泡5-10min;
(3)水洗:用水清洗铝型材表面;
(4)阳极氧化:将水洗后的铝型材置于质量浓度95-99%的硫酸溶液中作为阳极,用外加电流使阳极氧化,使铝型材表面钝化,形成8-16μm厚度的氧化膜,取出铝型材,用水冲洗铝型材表面;
(5)喷涂:干燥后,将防污漆在铝型材表面采用喷涂、滚涂和/或刷涂方式均匀涂抹,得到漆膜,漆膜厚度为8-12μm;
(6)固化:在温度为180-220℃的烘箱内烘烤20-30min后,自然冷却;
所述的步骤(5)中防污漆由下述重量份的原料制备而成:丙烯酸树脂38-42份、氯醋树脂5-15份、异佛尔酮二异氰酸酯5-10份、甲基异丁基甲酮25-35份、二氧化硅2-4份、2,2,4-三甲基-1,3-戊二醇单异丁酸酯1-2份、无机抗菌剂1-5份、抗静电剂0.5-1.5份。
所述的无机抗菌剂由磷酸锆、钛酸镁、铌酸镁混合而成,所述磷酸锆、钛酸镁、铌酸镁的质量比为(1-3):(1-3):(1-3)。
所述的抗静电剂由双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵混合而成,所述双十八烷基甲基叔胺、十八烷基甲基二羟乙基溴化铵、十二烷基三甲基溴化铵的质量比为(1-3):(1-3):(1-3)。
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