CN111393946B - 一种高操作期无溶剂环氧防腐涂料及其制备方法 - Google Patents
一种高操作期无溶剂环氧防腐涂料及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种高操作期无溶剂环氧防腐涂料及其制备方法,属于重防腐领域。所述的防腐漆由A组分和B组分组成,其中所述的A组分由如下质量分的成分构成:复合环氧树脂,增韧改性树脂,颜料,填料,流变助剂;B组分由如下质量分的成分构成:胺类固化剂,促进剂。本发明通过上述成分之间的相互作用,使得涂料具有无溶剂、高施工操作期、优良的耐化学腐蚀性、一次成膜厚的特点,可涂装于钢结构内部、管道、桥梁、储罐内壁、污水池等场所,对酸、碱、含油污水等化学品具有良好的防腐性,延长被涂物的使用寿命,节省维护成本。
Description
技术领域
本发明涉及重防腐领域,涉及一种高操作期无溶剂环氧防腐涂料及其制备方法,可用于钢结构内部、管道、桥梁、储罐内壁、污水池等场所的防腐涂装。
背景技术
随着环保形势的日益严峻,新一代涂料正朝着低VOC化的方向发展,而无溶剂环氧涂料由于具有不含挥发性有机溶剂、防腐性好、树脂自身高固含的特点,已成为发展最快的无溶剂涂料产品,广泛应用于钢结构内部、管道、桥梁、储罐内壁、污水池等场所的防腐涂装。但常规无溶剂环氧涂料存在操作期过短的缺点,施工时往往需要专门的双组份喷涂设备,或者采取少量调配的方法,增加了施工成本,同时也存在较大的施工风险,因而市场需要一款夏季施工操作期可达1-2h,具有良好的附着力、耐酸性、一次成膜超过500微米的无溶剂环氧防腐涂料。
发明内容
本发明的目的是为了解决上述问题,提供了一种具有良好防腐性能的高施工操作期的无溶剂环氧防腐涂料及其制备方法。
本发明的目的可以通过以下技术方案实现:
一种高操作期无溶剂环氧防腐涂料,该防腐涂料由A组分和B组分组成,所述的A组分和B组分成分如下:
A组分:
复合环氧树脂10-50份,增韧改性树脂1-30份,颜料1-30份,填料1-30份,流变助剂1-20份;
B组分:
复合胺类固化剂90-100份,促进剂1-10份。
在一些优选的技术方案中:
A组分:
复合环氧树脂40-50份,增韧改性树脂10-15份,颜料8-15份,填料20-30份,流变助剂5-10份;
B组分:
复合胺类固化剂95-100份,促进剂1-5份。
本发明技术方案中:复合环氧树脂由质量比20-25:20-25的E44环氧树脂和E51环氧树脂组成。
本发明技术方案中:增韧改性树脂选自腰果酚缩水甘油醚、聚丙二醇二缩水甘油醚中的一种或几种。
本发明技术方案中:颜料选自锐钛型钛白粉和炭黑粉中的一种或几种;填料选自绢云母、沉淀硫酸钡、碳酸钙、滑石粉中的一种或几种。
本发明技术方案中:流变助剂为质量比2-4:1-2:0.5-1的有机膨润土、气相二氧化硅和水合硅酸铝镁盐。
本发明技术方案中:复合胺类固化剂为质量比20-45:15-40:30-40的改性脂环胺、酚醛胺和改性聚酰胺。
本发明技术方案中:促进剂选自双氨基硅烷偶联剂、单氨基硅烷偶联剂中的一种或几种。
一种上述的高操作期无溶剂环氧防腐涂料的制备方法,方法包括以下步骤:
A组分的制备方法包括如下步骤:
首先将复合环氧树脂、增韧改性树脂高速搅拌分散均匀,得到混合物;其次在混合物中加入流变助剂并高速分散均匀,最后加入颜料及填料充分高速搅拌分散至细度≤90μm;
B组分的制备方法包括如下步骤:
在搅拌釜中加入配方量的复合胺类固化剂和促进剂,高速分散均匀;
A组分和B组分的质量比为2-4:1。
本发明的有益效果:
本发明通过复合环氧树脂、增韧改性树脂、颜料、填料、流变助剂、复合胺类固化剂、促进剂之间的相互作用,使得涂料具有无溶剂、高施工操作期、优良的耐化学腐蚀性、一次成膜厚的特点,可涂装于钢结构内部、管道、桥梁、储罐内壁、污水池等场所,对水、盐水、酸、碱、有机溶剂、含油污水等化学品具有良好的防腐性,延长被涂物的使用寿命,节省维护成本。试验耐酸、碱溶液浓度为5%,抗流挂性高于500微米。
具体实施方式
下面结合实施例对本发明做进一步说明,但本发明的保护范围不限于此:
环氧树脂、胺类固化剂均为市售产品。
表1实施例1~3各组分的成分及用量
表2对比例1~3各组分的成分及用量
实施例1~3和对比例1~3的制备方法:
A组分的制备方法包括如下步骤:
首先将复合环氧树脂、增韧改性树脂高速搅拌分散均匀,得到混合物;其次在混合物中加入流变助剂并高速分散均匀,最后加入颜料及填料充分高速搅拌分散至细度≤90μm;
B组分的制备方法包括如下步骤:
在搅拌釜中加入配方量的复合胺类固化剂和促进剂,高速分散均匀。
A组分和B组分的质量比为2~4:1。
将实施例1~3与对比例1~3得到的样品进行附着力、耐酸碱、耐含油污水、耐盐雾、流挂性、可操作期性能检测,检测结果见表3:
表3
实施例1与对比例1对比:
对比例1的复合环氧树脂中提高了E44树脂的比重,导致漆膜硬度降低,由于E44树脂分子量较E51大,导致交联密度降低,从而降低漆膜硬度。
对比例1的复合胺类固化剂中去掉了酚醛胺固化剂,导致在延长了施工操作期后,漆膜固化的表干时间过长,干性降低,酚醛胺固化剂可提高与树脂的交联速率。同时酚醛胺固化剂具有优异的耐盐雾性,去掉后的对比例1在经过3000h耐盐雾测试后附着力测试结果较实施例1降低较多。
对比例1中调整了流变助剂的组分,去掉了水合硅酸铝镁盐,导致了抗流挂性降低。
实施例2与对比例2对比:
对比例2的复合环氧树脂中降低了E44树脂的比重,提高E51树脂比重,漆膜硬度良好,但过多的E51树脂不利于延长施工可操作期,因E51环氧树脂的分子链短,反应过程中放热明显,温度积聚后导致交联反应加快,施工操作期缩短。
对比例2的复合胺类固化剂中去掉了赢创Ancamine 2883改性脂环胺固化剂,导致漆膜的附着力及耐酸性均有所降低,该款改性脂环胺固化剂与基材具有较高的结合力,并可提升漆膜的耐酸性能。
实施例3与对比例3对比:
对比例3的复合环氧树脂中降低了E44树脂的比重,提高E51树脂比重,漆膜硬度良好,但过多的E51树脂导致施工操作期缩短。同时对比例3中的复合胺类固化剂中去掉了赢创Ancamide 2784改性聚酰胺固化剂,该款固化剂粘度低、放热低,交联速率也较低,可明显延长施工操作期,导致对比例3的可操作期极短,但表干时间也较短。
对比例3中调整了流变助剂的组分,降低了水合硅酸铝镁盐添加量,导致了抗流挂性降低。
Claims (6)
1.一种高操作期无溶剂环氧防腐涂料,其特征在于:该防腐涂料由A组分和B组分组成,所述的A组分和B组分成分如下:
A组分:
复合环氧树脂10-50份,增韧改性树脂1-30份,颜料1-30份,填料1-30份,流变助剂1-20份;
B组分:
复合胺类固化剂90-100份,促进剂1-10份;
流变助剂为质量比2-4:1-2:0.5-1的有机膨润土、气相二氧化硅和水合硅酸铝镁盐;复合胺类固化剂为质量比20-45:15-40:30-40的改性脂环胺、酚醛胺和改性聚酰胺;复合环氧树脂由质量比20-25:20-25的E44环氧树脂和E51环氧树脂组成。
2.根据权利要求1所述的高操作期无溶剂环氧防腐涂料,其特征在于:
A组分:
复合环氧树脂40-50份,增韧改性树脂10-15份,颜料8-15份,填料20-30份,流变助剂5-10份;
B组分:
复合胺类固化剂95-100份,促进剂1-5份。
3.根据权利要求1所述的高操作期无溶剂环氧防腐涂料,其特征在于:增韧改性树脂选自腰果酚缩水甘油醚、聚丙二醇二缩水甘油醚中的一种或几种。
4.根据权利要求1所述的高操作期无溶剂环氧防腐涂料,其特征在于:颜料选自锐钛型钛白粉和炭黑粉中的一种或几种;填料选自绢云母、沉淀硫酸钡、碳酸钙、滑石粉中的一种或几种。
5.根据权利要求1所述的高操作期无溶剂环氧防腐涂料,其特征在于:促进剂选自双氨基硅烷偶联剂、单氨基硅烷偶联剂中的一种或几种。
6.一种权利要求1所述的高操作期无溶剂环氧防腐涂料的制备方法,其特征在于:该方法包括以下步骤:
A组分的制备方法包括如下步骤:
首先将复合环氧树脂、增韧改性树脂高速搅拌分散均匀,得到混合物;其次在混合物中加入流变助剂并高速分散均匀,最后加入颜料及填料充分高速搅拌分散至细度≤90μm;
B组分的制备方法包括如下步骤:
在搅拌釜中加入配方量的复合胺类固化剂和促进剂,高速分散均匀;
A组分和B组分的质量比为2-4:1。
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