CN106010135A - 一种阴极电泳涂料 - Google Patents
一种阴极电泳涂料 Download PDFInfo
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- 229910052782 aluminium Inorganic materials 0.000 description 1
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Abstract
本发明涉及一种阴极电泳涂料，属于电泳涂料技术领域。所述电泳涂料的特征在于包括以下重量百分比的成分：成膜基料30%～40%、成膜助剂1%～5%、固化剂10%～15%、颜料12%～20%、填料10%～15%、催化剂0.5～1%、消泡剂0.1%～0.5%、去离子水添加至100%。本发明提供的阴极电泳涂料具有附着力好、耐水性好、耐冲击性好的优点。
Description
技术领域
本发明涉及一种阴极电泳涂料，属于电泳涂料技术领域。
背景技术
电泳涂料属于环保涂料，它以水为溶剂，挥发性有机物(VOC)和有害空气污染物(HAP)含量低，对环境的污染比较小。按照电泳涂料在水中解离后的水溶性成膜物的极性不同，可分为阳极电泳涂料和阴极电泳涂料两类。阳极电泳涂料存在阳极氧化的缺点，会腐蚀金属表面(除铝及不活泼金属外)，使其失去光泽，故阳极电泳涂料一般只作防腐底漆，不能满足表面装饰的要求。人们于20世纪70年代初开发出了耐蚀性能更高且具有装饰性效果的阴极电泳涂料。由于其具有优良的防腐蚀性、高泳透率、高流平性、高装饰性且涂装自动化程度高、涂装污染少等特点，目前已广泛应用于汽车和机动车工业中，并正推广应用到建材、轻工、家用电器等工业领域以及五金和工艺品的表面防腐和装饰。
CN105315838A提供一种阴极电泳漆液，所述阴极电泳漆液是由包括如下重量份数的组分制备得到的：改性胺固化剂25～45份；交联剂10～15份；树脂色浆5～10份；中和剂3～5份；助溶剂10～15份。
但是上述涂料存在附着力不高、耐水性一般的缺点。
发明内容
本发明的目的是：提供一种阴极电泳涂料，具有附着力好、耐水性好、耐冲击性好的优点。
技术方案是：
一种阴极电泳涂料，包括以下重量百分比的成分：成膜基料30%～40%、成膜助剂1%～5%、固化剂10%～15%、颜料12%～20%、填料10%～15%、催化剂0.5～1%、消泡剂0.1%～0.5%、去离子水添加至100%。
所述的成膜基料是二乙醇胺改性环氧树脂乳液。
所述的成膜助剂是伊士曼化工公司的酯醇十二（2,2,4-三甲基-1,3-戊二醇单异丁酸酯）。
所述的固化剂是韩国爱敬公司的FH075封闭型异氰酸酯固化剂。
所述的颜料为金红石型钛白粉R218。
所述的填料为高岭土和氧化铝。
所述的催化剂为10％二丁基二月桂酸锡的乙二醇单乙醚溶液。
所述的消泡剂为巴斯夫公司的2550。
成膜基料的制备方法是：
第1步，按重量份计，将双酚A型环氧树脂30～50份与丙二醇甲醚40～60份混合后，升温至70～75℃预热15～20min，然后滴加二乙醇胺10～15份，在70～75℃反应3～5h；
第2步，将反应产物减压蒸馏除水，降温至40～50℃，加入冰醋酸2～4份中和，再加入水100～120份和乳化剂2～4份，1500～2000rpm的转速下高速分散后，制得二乙醇胺改性环氧树脂乳液。
所述的第1步中，双酚A环氧树脂是指E-51环氧树脂；
所述的第2步中，乳化剂是SPAN60。
所述的阴极电泳涂料的制备方法，包括如下步骤：
将成膜基料、成膜助剂、固化剂、颜料、填料、催化剂、消泡剂、去离子水加入乳化分散机中，以2000~2500rpm的转速高速乳化40～60min，得到涂料。
有益效果
本发明提供的阴极电泳涂料，具有附着力好、耐水性好、耐冲击性好的优点。
具体实施方式
实施例1
阴极电泳涂料，包括以下重量百分比的成分：成膜基料30%、成膜助剂1%、固化剂10%、颜料12%、填料10%、催化剂0.5%、消泡剂0.1%、去离子水添加至100%。
所述的成膜基料的制备方法是：
第1步，按重量份计，将E-51环氧树脂30份与丙二醇甲醚40份混合后，升温至70℃预热15min，然后滴加二乙醇胺10份，在70℃反应3h；
第2步，将反应产物减压蒸馏除水，降温至40℃，加入冰醋酸2份中和，再加入水100份和乳化剂（SPAN60）2份，1500rpm的转速下高速分散后，制得二乙醇胺改性环氧树脂乳液。
所述的阴极电泳涂料的制备方法，包括如下步骤：
将成膜基料、成膜助剂、固化剂、颜料、填料、催化剂、消泡剂、去离子水加入乳化分散机中，以2000rpm的转速高速乳化40min，得到涂料。
实施例2
阴极电泳涂料，包括以下重量百分比的成分：成膜基料40%、成膜助剂5%、固化剂15%、颜料20%、填料15%、催化剂1%、消泡剂0.5%、去离子水添加至100%。
所述的成膜基料的制备方法是：
第1步，按重量份计，将E-51环氧树脂50份与丙二醇甲醚60份混合后，升温至75℃预热20min，然后滴加二乙醇胺15份，在75℃反应5h；
第2步，将反应产物减压蒸馏除水，降温至50℃，加入冰醋酸4份中和，再加入水120份和乳化剂（SPAN60）4份，2000rpm的转速下高速分散后，制得二乙醇胺改性环氧树脂乳液。
所述的阴极电泳涂料的制备方法，包括如下步骤：
将成膜基料、成膜助剂、固化剂、颜料、填料、催化剂、消泡剂、去离子水加入乳化分散机中，以2500rpm的转速高速乳化60min，得到涂料。
实施例3
阴极电泳涂料，包括以下重量百分比的成分：成膜基料35%、成膜助剂3%、固化剂12%、颜料16%、填料12%、催化剂0.8%、消泡剂0.3%、去离子水添加至100%。
所述的成膜基料的制备方法是：
第1步，按重量份计，将E-51环氧树脂40份与丙二醇甲醚50份混合后，升温至72℃预热17min，然后滴加二乙醇胺12份，在72℃反应4h；
第2步，将反应产物减压蒸馏除水，降温至45℃，加入冰醋酸3份中和，再加入水110份和乳化剂（SPAN60）3份，1800rpm的转速下高速分散后，制得二乙醇胺改性环氧树脂乳液。
所述的阴极电泳涂料的制备方法，包括如下步骤：
将成膜基料、成膜助剂、固化剂、颜料、填料、催化剂、消泡剂、去离子水加入乳化分散机中，以2200rpm的转速高速乳化50min，得到涂料。
对照例
与实施例3的区别在于：成膜基料环氧树脂的制备中未加入二乙醇胺改性。
阴极电泳涂料，包括以下重量百分比的成分：成膜基料35%、成膜助剂3%、固化剂12%、颜料16%、填料12%、催化剂0.8%、消泡剂0.3%、去离子水添加至100%。
所述的成膜基料的制备方法是：
第1步，按重量份计，将E-51环氧树脂40份与丙二醇甲醚50份混合后，升温至72℃预热17min，然后反应4h；
第2步，将反应产物减压蒸馏除水，降温至45℃，加入冰醋酸3份中和，再加入水110份和乳化剂（SPAN60）3份，1800rpm的转速下高速分散后，制得二乙醇胺改性环氧树脂乳液。
所述的阴极电泳涂料的制备方法，包括如下步骤：
将成膜基料、成膜助剂、固化剂、颜料、填料、催化剂、消泡剂、去离子水加入乳化分散机中，以2200rpm的转速高速乳化50min，得到涂料。
将实施例和对比例分别进行如下的电泳工艺：
先将含二乙醇胺改性环氧树脂的阴极电泳涂料原液用高速分散机搅拌均匀，加入到电泳槽中，缓慢加入去离子水稀释到固含量为18％，过滤，用乙酸调节槽液的pH值到5.0，用高速分散机搅拌24小时，得到可直接进行电泳实验的涂料乳液。以不锈钢板做阳极，以经过脱脂，磷化后的马口铁板作为阴极，被涂物铁片在电沉积之前都需要经过以下工序进行前处理：砂纸打磨→除油→水洗→除锈→水洗→中和→水洗→磷化(常温)→水洗→吹干，放入干燥器保存。电泳电压为150V，电泳时间为3分钟，电泳结束后，取出阴极铁片先用自来水除去残留表面的漆液，再用蒸馏水冲洗，在160℃下固化40分钟，制得阴极电泳涂料漆膜，并进行性能测试。
附着力：根据GB/T9286规定的方法测定涂料层的附着力。
硬度：根据GB/T6739规定的方法测定涂料层的铅笔硬度。
柔韧性：根据GB/T6742规定的方法测定涂料层的柔韧性。
耐水性：根据GB/T 1733规定的方法测定涂料层的耐水性。
耐冲击性：根据GB/T1732规定的方法测定涂料层的耐冲击性。
涂层性能如下：
从表中可以看出，本发明提供的涂料具有较好的附着力、耐水性和耐冲击性。实施例3相对于对照例来说，通过采用二乙醇胺对环氧树脂进行改性有效地提高了阴极电泳涂料的附着力和耐水性。
Claims (10)
1.一种阴极电泳涂料，其特征在于包括以下重量百分比的成分：成膜基料30%～40%、成膜助剂1%～5%、固化剂10%～15%、颜料12%～20%、填料10%～15%、催化剂0.5～1%、消泡剂0.1%～0.5%、去离子水添加至100%。
2.根据权利要求1所述的阴极电泳涂料，其特征在于，所述的成膜基料是二乙醇胺改性环氧树脂乳液。
3.根据权利要求1所述的阴极电泳涂料，其特征在于，成膜基料的制备方法包括如下步骤：第1步，按重量份计，将双酚A型环氧树脂30～50份与丙二醇甲醚40～60份混合后，升温至70～75℃预热15～20min，然后滴加二乙醇胺10～15份，在70～75℃反应3～5h；第2步，将反应产物减压蒸馏除水，降温至40～50℃，加入冰醋酸2～4份中和，再加入水100～120份和乳化剂2～4份，1500～2000rpm的转速下高速分散后，制得二乙醇胺改性环氧树脂乳液。
4.根据权利要求3所述的阴极电泳涂料，其特征在于，所述的第1步中，双酚A环氧树脂是指E-51环氧树脂；所述的第2步中，乳化剂是SPAN60。
5.根据权利要求1所述的阴极电泳涂料，其特征在于，所述的成膜助剂是伊士曼化工公司的酯醇十二（2,2,4-三甲基-1,3-戊二醇单异丁酸酯）。
6.根据权利要求1所述的阴极电泳涂料，其特征在于，所述的固化剂是韩国爱敬公司的FH075封闭型异氰酸酯固化剂。
7.根据权利要求1所述的阴极电泳涂料，其特征在于，所述的颜料为金红石型钛白粉R218。
8.根据权利要求1所述的阴极电泳涂料，其特征在于，所述的填料为高岭土和氧化铝。
9.根据权利要求1所述的阴极电泳涂料，其特征在于，所述的催化剂为10％二丁基二月桂酸锡的乙二醇单乙醚溶液；所述的消泡剂为巴斯夫公司的2550。
10.权利要求1所述的阴极电泳涂料的制备方法，其特征在于，将成膜基料、成膜助剂、固化剂、颜料、填料、催化剂、消泡剂、去离子水加入乳化分散机中，以2000~2500rpm的转速高速乳化40～60min，得到涂料。
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