CN106221307A - 一种防腐蚀性能增强的水性铝颜料 - Google Patents
一种防腐蚀性能增强的水性铝颜料 Download PDFInfo
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Abstract
本发明公开了一种防腐蚀性能增强的水性铝颜料,其特征在于,由下列重量份的原料制备制成:片状铝粉40‑45、异丙醇100‑110、硫酸铜晶体0.3‑0.35、去离子水适量、酚醚型磷酸酯4‑4.5、无水乙醇适量、正硅酸乙酯9‑10、乙烯基三乙氧基硅烷6‑7、浓度为20wt%的氨水9‑10、乙酸丁酯200‑220、丙烯酸5‑6、甲基丙烯酸5‑6、过氧化二苯甲酰0.6‑0.65、丙二醇单甲醚13‑15、羧甲基纤维素1.2‑1.5、玻璃鳞片2‑3、聚偏氟乙烯1.5‑2、硅灰石2‑3、三聚磷酸铝4‑5、硅烷偶联剂kh5500.5‑0.6、聚乙烯蜡0.8‑1。本发明可用作防腐涂料的增强成分。
Description
技术领域
本发明涉及颜料技术领域,尤其涉及一种防腐蚀性能增强的水性铝颜料。
背景技术
铝颜料是重要的金属颜料之一,因其独特的美观效果和防腐性,近年来在防腐涂料、工业涂料、汽车涂料、建筑室内外装修涂料、家用电器涂料、印刷油墨以及塑料加工业获得广泛应用。随着人们环保意识的不断增强以及政府环保法规的不断完善,传统有机溶剂型涂料必然会被环保型水性涂料所取代,水性涂料所用的铝颜料与溶剂型涂料用的铝颜料有不同的要求:首先,颜料表面必须亲水,能有效地分散在水中,其次必须在水介质中保持较高的化学稳定性。然而,铝的化学性质比较活泼,极易与氧或水发生反应,这不仅腐蚀了铝颜料表面,影响了铝的金属光泽和稳定性,甚至还会引发爆炸,给生产带来不安全因素。因此铝颜料的水性化研究成为热点,并已取得一定的进展。
《铜离子氧化铝粉增强磷酸酯对铝颜料的缓蚀作用》一文中,采用铜离子氧化铝粉实现铝粉表面羟基化,然后以酚醚型磷酸酯作为缓蚀剂,制备方法简单,不含对有机体有害的铬酸盐、钼酸盐、亚硝酸盐等成分,与铝颜料表面有一定的亲和力,能使金属腐蚀速率明显降低。在铝颜料体系中添加抑制剂的方法虽然能够抑制铝的腐蚀速度,但是缓蚀效果有限,延长与水性体系涂料、油墨等接触,还是会对铝颜料造成一定的腐蚀,降低金属光泽的同时还存在安全隐患。这就需要在原有抑制剂改性的基础上进行改性,进一步提高铝颜料的耐腐蚀性,从而提高在水性涂料、油墨等产品中的应用性。
发明内容
本发明目的就是为了弥补已有技术的缺陷,提供一种防腐蚀性能增强的水性铝颜料。
本发明是通过以下技术方案实现的:
一种防腐蚀性能增强的水性铝颜料,由下列重量份的原料制备制成:片状铝粉40-45、异丙醇100-110、硫酸铜晶体0.3-0.35、去离子水适量、酚醚型磷酸酯4-4.5、无水乙醇适量、正硅酸乙酯9-10、乙烯基三乙氧基硅烷6-7、浓度为20wt%的氨水9-10、乙酸丁酯200-220、丙烯酸5-6、甲基丙烯酸5-6、过氧化二苯甲酰0.6-0.65、丙二醇单甲醚13-15、羧甲基纤维素1.2-1.5、玻璃鳞片2-3、聚偏氟乙烯1.5-2、硅灰石2-3、三聚磷酸铝4-5、硅烷偶联剂kh5500.5-0.6、聚乙烯蜡0.8-1。
所述一种防腐蚀性能增强的水性铝颜料,由以下具体步骤制成:
(1)将片状铝粉放入反应釜中,加入异丙醇、酚醚型磷酸酯,加热至40-50℃,搅拌反应60-80分钟,将硫酸铜晶体溶于40-50倍量的去离子水中形成溶液缓慢加入上述反应体系中,控制15-20分钟加完,恒温搅拌90-120分钟,抽滤,在55-60℃下真空干燥,得到缓蚀改性铝粉;
(2)将正硅酸乙酯与乙烯基三乙氧基硅烷混合,加入总量2-2.5倍量的无水乙醇,形成混合液A待用;在浓度为20wt%的氨水中加入1.5-2倍量的去离子水、3-4倍量的无水乙醇,搅拌均匀形成混合液B待用;将步骤(1)得到的缓蚀改性铝粉中加入10-12倍量的无水乙醇,然后升温至50-60℃,将混合液A和 B并流滴加到反应体系中,滴加完毕后保温4-5小时,停止加热,过滤,用无水乙醇洗涤产物,最后在50-60℃下真空干燥,得到单层包覆铝粉;
(3)将丙烯酸、甲基丙烯酸、过氧化二苯甲酰加入一半量的乙酸丁酯中搅拌均匀形成混合液待用;将步骤(2)得到的一次包覆铝粉中加入剩余量的乙酸丁酯总,超声分散120-150分钟,然后加入上述混合液,以350-400转/份的速度搅拌并加热至85℃,保温反应5-6小时,冷却至室温后抽滤,在55-60℃下真空干燥,得到双重包覆铝粉;
(4)将玻璃鳞片与硅灰石混合,放入粉碎机中粉碎,过100目筛,然后放入球磨机中,混合球磨30-40分钟后喷入溶于5-6倍量无水乙醇的硅烷偶联剂kh550,加热至50-60℃,球磨40-50分钟出料,离心,干燥,得到混合粉末,再将混合粉末、三聚磷酸铝以及除丙二醇单甲醚之外的其余剩余成分混合,放入造粒机中,挤出造粒,在烘箱中以80-90℃,最后粉碎,过200目筛,得到添加助剂;
(5)将步骤(3)得到的双重包覆铝粉与步骤(4)得到的添加助剂混合,加入丙二醇单甲醚,放入捏合机中捏合30-40分钟,最后真空干燥,即得本发明。
本发明的优点是:本发明首先通过铜离子氧化铝实现铝粉表面羟基化,可以吸附酚醚型磷酸酯,具有一定的缓蚀作用;然后通过一系列的工艺将二氧化硅以及聚丙烯酸酯分别包覆在缓蚀改性铝粉表面,形成致密的核壳结构,可有效屏蔽铝粉核心,防止铝颜料与水或空气介质发生接触反应,双重包覆显著提高铝颜料的耐蚀性;制备的铝颜料应用于涂料中的分散性能良好,涂膜外观平整光滑,光泽度好,对涂层的附着力佳。
本发明将玻璃鳞片、硅灰石等成分改性后与三聚磷酸铝等成分混合,制成的添加助剂添加到产品的制备中,协同作用,能够增强产品的防腐蚀作用,可用作防腐涂料的增强成分,增强了涂层的致密性及抗离子渗透性、硬度以及光洁度。
具体实施方式
一种防腐蚀性能增强的水性铝颜料,由下列重量份(公斤)的原料制备制成:片状铝粉40、异丙醇100、硫酸铜晶体0.3、去离子水适量、酚醚型磷酸酯4、无水乙醇适量、正硅酸乙酯9、乙烯基三乙氧基硅烷6、浓度为20wt%的氨水9、乙酸丁酯200、丙烯酸5、甲基丙烯酸5、过氧化二苯甲酰0.6、丙二醇单甲醚13、羧甲基纤维素1.2、玻璃鳞片2、聚偏氟乙烯1.5、硅灰石2、三聚磷酸铝4、硅烷偶联剂kh5500.5、聚乙烯蜡0.8。
所述一种防腐蚀性能增强的水性铝颜料,由以下具体步骤制成:
(1)将片状铝粉放入反应釜中,加入异丙醇、酚醚型磷酸酯,加热至40℃,搅拌反应60分钟,将硫酸铜晶体溶于40倍量的去离子水中形成溶液缓慢加入上述反应体系中,控制15分钟加完,恒温搅拌90分钟,抽滤,在55℃下真空干燥,得到缓蚀改性铝粉;
(2)将正硅酸乙酯与乙烯基三乙氧基硅烷混合,加入总量2倍量的无水乙醇,形成混合液A待用;在浓度为20wt%的氨水中加入1.5倍量的去离子水、3倍量的无水乙醇,搅拌均匀形成混合液B待用;将步骤(1)得到的缓蚀改性铝粉中加入10倍量的无水乙醇,然后升温至50℃,将混合液A和 B并流滴加到反应体系中,滴加完毕后保温4小时,停止加热,过滤,用无水乙醇洗涤产物,最后在50℃下真空干燥,得到单层包覆铝粉;
(3)将丙烯酸、甲基丙烯酸、过氧化二苯甲酰加入一半量的乙酸丁酯中搅拌均匀形成混合液待用;将步骤(2)得到的一次包覆铝粉中加入剩余量的乙酸丁酯总,超声分散120分钟,然后加入上述混合液,以350转/份的速度搅拌并加热至85℃,保温反应5小时,冷却至室温后抽滤,在55℃下真空干燥,得到双重包覆铝粉;
(4)将玻璃鳞片与硅灰石混合,放入粉碎机中粉碎,过100目筛,然后放入球磨机中,混合球磨30分钟后喷入溶于5倍量无水乙醇的硅烷偶联剂kh550,加热至50℃,球磨40分钟出料,离心,干燥,得到混合粉末,再将混合粉末、三聚磷酸铝以及除丙二醇单甲醚之外的其余剩余成分混合,放入造粒机中,挤出造粒,在烘箱中以80℃,最后粉碎,过200目筛,得到添加助剂;
(5)将步骤(3)得到的双重包覆铝粉与步骤(4)得到的添加助剂混合,加入丙二醇单甲醚,放入捏合机中捏合30分钟,最后真空干燥,即得本发明。
经检验,本发明产品在水性体系中分散性好,缓蚀效率为97.9%,涂层光泽度为110.7Gs。
Claims (2)
1.一种防腐蚀性能增强的水性铝颜料,其特征在于,由下列重量份的原料制备制成:片状铝粉40-45、异丙醇100-110、硫酸铜晶体0.3-0.35、去离子水适量、酚醚型磷酸酯4-4.5、无水乙醇适量、正硅酸乙酯9-10、乙烯基三乙氧基硅烷6-7、浓度为20wt%的氨水9-10、乙酸丁酯200-220、丙烯酸5-6、甲基丙烯酸5-6、过氧化二苯甲酰0.6-0.65、丙二醇单甲醚13-15、羧甲基纤维素1.2-1.5、玻璃鳞片2-3、聚偏氟乙烯1.5-2、硅灰石2-3、三聚磷酸铝4-5、硅烷偶联剂kh5500.5-0.6、聚乙烯蜡0.8-1。
2.根据权利要求1所述一种防腐蚀性能增强的水性铝颜料,其特征在于,由以下具体步骤制成:
(1)将片状铝粉放入反应釜中,加入异丙醇、酚醚型磷酸酯,加热至40-50℃,搅拌反应60-80分钟,将硫酸铜晶体溶于40-50倍量的去离子水中形成溶液缓慢加入上述反应体系中,控制15-20分钟加完,恒温搅拌90-120分钟,抽滤,在55-60℃下真空干燥,得到缓蚀改性铝粉;
(2)将正硅酸乙酯与乙烯基三乙氧基硅烷混合,加入总量2-2.5倍量的无水乙醇,形成混合液A待用;在浓度为20wt%的氨水中加入1.5-2倍量的去离子水、3-4倍量的无水乙醇,搅拌均匀形成混合液B待用;将步骤(1)得到的缓蚀改性铝粉中加入10-12倍量的无水乙醇,然后升温至50-60℃,将混合液A和 B并流滴加到反应体系中,滴加完毕后保温4-5小时,停止加热,过滤,用无水乙醇洗涤产物,最后在50-60℃下真空干燥,得到单层包覆铝粉;
(3)将丙烯酸、甲基丙烯酸、过氧化二苯甲酰加入一半量的乙酸丁酯中搅拌均匀形成混合液待用;将步骤(2)得到的一次包覆铝粉中加入剩余量的乙酸丁酯总,超声分散120-150分钟,然后加入上述混合液,以350-400转/份的速度搅拌并加热至85℃,保温反应5-6小时,冷却至室温后抽滤,在55-60℃下真空干燥,得到双重包覆铝粉;
(4)将玻璃鳞片与硅灰石混合,放入粉碎机中粉碎,过100目筛,然后放入球磨机中,混合球磨30-40分钟后喷入溶于5-6倍量无水乙醇的硅烷偶联剂kh550,加热至50-60℃,球磨40-50分钟出料,离心,干燥,得到混合粉末,再将混合粉末、三聚磷酸铝以及除丙二醇单甲醚之外的其余剩余成分混合,放入造粒机中,挤出造粒,在烘箱中以80-90℃,最后粉碎,过200目筛,得到添加助剂;
(5)将步骤(3)得到的双重包覆铝粉与步骤(4)得到的添加助剂混合,加入丙二醇单甲醚,放入捏合机中捏合30-40分钟,最后真空干燥,即得本发明。
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