CN111819250B - 用阴极电沉积法沉积薄涂层的涂料组合物 - Google Patents

用阴极电沉积法沉积薄涂层的涂料组合物 Download PDF

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CN111819250B
CN111819250B CN201780095695.8A CN201780095695A CN111819250B CN 111819250 B CN111819250 B CN 111819250B CN 201780095695 A CN201780095695 A CN 201780095695A CN 111819250 B CN111819250 B CN 111819250B
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伊莉娜·费奥多罗芙娜·乌特基纳
塔特雅纳·尼古拉耶夫纳·玛伊瓦
娜杰日达·弗拉基米洛夫娜·提蒙金
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OBSHCHESTVO S OGRANICHENNOY OTVETSTVENNOSTYU "RUSTEK"
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Abstract

本发明涉及具有高分散性的用阴极电沉积法沉积薄涂层的涂料组合物，其用于通过阴极电沉积方法获得耐化学和耐热涂层。本发明的技术效果是提高了涂层的耐热性、耐盐性和耐水性以及涂层的高耐化学性。用于通过阴极电沉积方法获得薄涂层的清漆组合物包括：浓度为参考标准的36‑38％环氧树脂的水性乳液、100％乙酸，2％3‑氨基丙基三乙氧基硅烷水溶液，和蒸馏水，具有以下组分比，g/l：环氧树脂水性乳液120‑150；100％乙酸0.1‑0.6；2％3‑氨基丙基三乙氧基硅烷水溶液5‑50；加蒸馏水至1升。

Description

用阴极电沉积法沉积薄涂层的涂料组合物
技术领域
本发明涉及具有分散能力(throwingpower)的涂料和清漆组合物(聚电解质)的水性分散体，适用于通过阴极电沉积法（cathodic-electrodepositionmethod）(电泳)沉积耐化学和耐高温涂料。
背景技术
2004年1月27日公开的专利RU2222563C1中给出的现有技术解决方案公开了一种基于氟塑料和水的组合物，用于沉积疏水性耐化学和耐磨性电泳涂层，其中该组合物包含氟塑料F-40D(杜邦公司的Tefzel含氟聚合物可以用作类似物)的水分散体作为氟塑料，还包含环氧胺加合物、二乙基氨基丙胺和环氧树脂在乙基溶纤剂中的溶液；100％甲酸；乙氧基化壬基酚作为稳定剂，以及十二烷基氯化铵，以下组分含量，g/L：所述加合物–100；100％甲酸-1.41；氟塑料F-40D的水分散体–250至300；所述稳定剂–30至50；十二烷基氯化铵–7至8；加水平衡至1升。
但是，现有技术组合物的缺点是分散能力低，不允许使用该组合物在形状复杂的物品上沉积高质量的涂层。
在2011年12月27日公开的专利RU2437908C1中公开了与本发明最接近的现有技术解决方案。所提出的涂料和清漆组合物包括用部分封闭的甲苯二异氰酸酯作为粘合剂改性的环氧-胺加合物；通过上述加合物稳定的颜料浆；100％乙酸作为中和剂；丁二醇、苯氧基丙醇、水，和氟弹性体，具有以下组分含量，g/L：所述加合物–100；颜料浆(100％)–28至32；氟橡胶(干重(d.w.b.)的60％至70％)–48至52；乙酸(100％)–0.4；丁二醇–3.5至4.1；苯氧丙醇–4.5至5.1，加水平衡至1升。
但是，上述涂料和清漆组合物的缺点是沉积涂层的高温抵抗力低。
发明内容
本发明的目的是开发用于使用阴极电沉积方法(电泳)沉积耐化学和耐高温薄涂层的涂料和清漆组合物。
本发明的技术效果是由于涂层的高耐化学性而提高了对高温、盐和水的耐受性。
所述技术效果是通过使用以下的沉积薄电泳涂层的涂料或清漆组合物获得，所述涂料或清漆组合物包括：浓度为36-38％的水性环氧树脂乳液(以干重计，d.w.b.)、100％乙酸、2％3-氨丙基三乙氧基硅烷的水溶液，和蒸馏水，具有以下含量，g/L：
水性环氧树脂乳液–120至150；
100％乙酸-0.1至0.6；
2％3-氨丙基三乙氧基硅烷水溶液–5至50，和
蒸馏水平衡至1升。
所述涂料和清漆组合物还包含用低分子环氧树脂稳定的颜料浆的水性分散体，浓度为52-56％(d.w.b.)，含量为40-47g/L。
所述涂料和清漆组合物还包含水性氟弹性体，其浓度为60-70％(d.w.b.)，含量为2.5-10g/L的。
具体实施方式
不添加颜料浆和水性氟弹性体的要求保护的涂料和清漆组合物如下制备。
取预定量的用乙酸预先酸化的蒸馏水(在要求的范围内)，然后，在剧烈搅拌下(200-500rpm)，将其与通过细射流缓慢进料的36％至38％(d.w.b.)的水性环氧树脂(其量在要求的范围内) 混合，，然后加入预定量(在要求的范围内)的2％3-氨丙基三乙氧基硅烷水溶液。
要求保护的加入颜料浆和/或水性氟弹性体的涂料和清漆组合物如下制备。
取预定量的用乙酸预先酸化的蒸馏水(在要求的范围内)，并在搅拌下将其与适量的60％至70％(d.w.b.)的水性氟弹性体混合，然后，在强烈搅拌(200-500rpm)下，加入预定量的36-38％(d.w.b.)的水性环氧树脂乳液(在要求的范围内)。
在这种情况下，通过粘合剂并且使得氟弹性体颗粒带正电使弹性体颗粒进一步稳定。此外，如果需要，可在搅拌下将组合物与用低分子环氧树脂稳定的52％至56％(d.w.b.)水性颜料(颜料可以是任何颜色)浆分散体混合，然后继续搅拌，加入预定量(在要求的范围内))2％3-氨丙基三乙氧基硅烷水溶液。
要求保护的制成的组合物可用于将电泳涂层沉积到任何导电材料上，包括铁和非铁金属、粉末金属、半导体材料和导电塑料。唯一需要更改的是沉积方式参数和表面制备方法。
要制备需要涂覆的表面，必须将其脱脂(使用石油溶剂油、丙酮或特殊的清洁剂组合物等)。
通过浸入电解液池中，将涂料沉积在物品的表面，该电解液是涂料和清漆材料的水溶液。该池配有混合系统、工作溶液温度控制系统、电渗析清洁系统和直流电源。将要涂覆的物品浸入池中时正确连接作为阴极，而不锈钢板作为相对电极连接。
电泳过程如下：沉积电压–160VDC至250VDC；沉积时间–60至180秒；工作溶液温度–从30℃到34℃；最终的涂层厚度-从10μm到40μm。沉积的涂层用蒸馏水洗涤，并在180℃下30分钟聚合。
氟橡胶是六氟丙烯、四氟乙烯和偏二氟乙烯的共聚物，总氟含量为70wt％。
环氧树脂作为组合物的主要成分，提供了涂层的基本性能，提高了耐盐和耐水性；颜料浆的添加使薄膜着色，并增加硬度、耐盐和耐水性；氟弹性体提供必要水平的耐化学性；氨基丙基三乙氧基硅烷提高了耐高温性、耐化学性和耐水性；最后，乙酸是确保溶液酸度的环氧树脂中和剂。
表1给出了要求保护的涂料和清漆组合物的例子，表2、3、4和5显示根据要求保护的涂料和清漆组合物的上述例子在08KP级钢(结构质量碳钢)上沉积的涂层的性能，以及表图6、7、8和9显示在p型半导体热电材料(Bi2Te2)х(Sb2Te)1-x和(Bi2Te3)х(Sb2Te3)y(Sb2Se3)1-y-x以及n型半导体热电材料(Bi2Se3)x(Bi2Te3)1-x上沉积的同样的涂层的性能。
本发明已参考特定实施例在上文中公开。如本说明书中所公开的，在不背离其实质的情况下，本公开的其他实施例对于本领域技术人员而言将是显而易见的。因此，应认为本发明的范围仅由所附权利要求书限制。
表1
Figure DEST_PATH_IMAGE001
表2
钢上的电泳涂层
Figure 451351DEST_PATH_IMAGE002
表3
钢上的添有颜料浆和氟弹性体的电泳涂层
Figure DEST_PATH_IMAGE003
表4
钢上的添有颜料浆的电泳涂层
Figure 40596DEST_PATH_IMAGE004
表5
钢上的添有氟弹性体的电泳涂层
Figure DEST_PATH_IMAGE005
表6
半导体上的电泳涂层
Figure 554754DEST_PATH_IMAGE006
表7
半导体上的添有颜料浆和氟弹性体的电泳涂层
Figure DEST_PATH_IMAGE007
表8
半导体上的添有颜料浆的电泳涂层
Figure 622067DEST_PATH_IMAGE008
表9
半导体上的电泳涂层
Figure DEST_PATH_IMAGE009

Claims (4)

1.一种用于使用阴极电沉积法沉积薄涂层的涂料组合物，其包含36％至38％干重的水性环氧树脂乳液、100％的乙酸、2％的3-氨丙基三乙氧基硅烷水溶液和蒸馏水，
并且具有以下含量，g/L：
水性环氧树脂乳液–120至150；
100％乙酸-0.1至0.6；
2％3-氨丙基三乙氧基硅烷水溶液–5至50，和
蒸馏水平衡至1升。
2.如权利要求1所述的涂料组合物，其特征在于，所述组合物还包含40-47g/L的52-56％干重的用低分子量环氧树脂稳定的颜料浆水性分散体。
3.如权利要求1或2中任一项所述的涂料组合物，其特征在于，所述组合物还包含2.5至10g/L的60至70％干重的水性氟弹性体。
4.如权利要求1所述的涂料组合物，其特征在于，所述的涂料组合物为清漆组合物。
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RU2495070C1 (ru) * 2012-09-05 2013-10-10 Закрытое акционерное общество "ОНТК-94" Лакокрасочная композиция с высокой рассеивающей способностью для получения методом электроосаждения на катоде химстойких износостойких покрытий с повышенной твердостью и антикоррозионной защитой
RU2515128C1 (ru) * 2012-09-11 2014-05-10 Общество с ограниченной ответственностью "ВИННЕР" Способ изготовления полупроводниковых ветвей для термоэлектрического модуля и термоэлектрический модуль

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