Page 69 - 涂层与防护2020-07-电子版

涂层与防护
第 41 卷第 7 期 Vol.41 No.7
Jul.2020
2020 年 7 月
COATING AND PROTECTION

高泳透力阴极电泳涂料乳液的研制

孙家娣
（中海油常州环保涂料有限公司，江苏常州 213014）

摘要：以胺化环氧树脂为主体树脂，封闭型异氰酸酯为固化剂，经有机酸中和后添加去离子水乳化，制
备高泳透力阴极电泳涂料乳液。 对乳液性能、电泳涂料泳透力、漆膜性能等进行表征。 结果表明：当有机酸
用量为 1.0%、胺化环氧树脂用量为 20%、固化剂用量为 10%时，可获得性能优良的乳液。 乳液固体分为
（33±2）%，pH 值（6.0±0.1），电导率(2 500±200)μs/cm，平均粒径（110±10）nm。 与电泳专用灰浆配套，漆膜外
观平整光滑，机械性能良好，得到泳透力(G/A=0.6)高和耐盐雾(1 200 h)性能好的高泳透力阴极电泳涂料。
关键词：电泳涂料；乳液；高泳透力；耐盐雾
中图分类号：TQ630.7 文献标识码：A 文章编号：2096-8639(2020)07-0049-04

Development of Emulsion for Cathodic Electrodeposition

Coatings with High Throwing Power

Sun Jiadi
(CNOOC Changzhou EP Coating Co., Ltd., Changzhou, Jiangsu 213014, China)

Abstract: An emulsion for cathodic electrodeposition coatings with high throwing power is
developed using an epoxy-amine resin as main resin, a blocked polyisocyanate as crosslinking agent
in addition to acetic acid. The performance of the emulsion is studied. The throwing power and film
properties of the electrodeposition coatings are tested. When the emulsion formula contains 1.0%
acetic acid, 20% epoxy -amine resin and 10% blocked polyisocyanate crosslinking agent, the
favorable performance emulsion is obtained. The solid content of emulsion is 33±2%. The pH value
and conductivity of the emulsion are 6.0±0.1 and 2 500±200 μs/cm respectively. And the emulsion
particle size is 110 ±10 nm. The prepared coatings formulated with waterborne pigment pastes
exhibited a uniform surface with good properties, high throwing power (G/A =0.6), and favorable
anticorrosion property (1 200 h).
Keywords： electrodeposition coating; emulsion; high throwing power; anticorrosion

0 引言 腔的漆膜厚度， 而外部的漆膜厚度不增长或少增长，
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以减少漆膜厚度增加导致的浪费 。 高泳透力阴极电
阴极电泳涂料是车身涂装领域应用最广泛的涂 泳涂料便是实现这种涂装效果的关键所在。 由于车身
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料，具有优良的防腐蚀性和安全环保性 。 从车身涂装 结构本身工艺的限制，车身内表面或内腔普遍存在膜
应用角度， 降低涂装成本同时满足整车的防腐蚀性 厚薄和防腐蚀性能不足的问题，高泳透力阴极电泳涂
能，这就需要在电泳涂装时尽量增加车身内表面或内 料的开发及相关研究具有重要意义 。
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涂层技术 COATING TECHNOLOGY