Page 33 - 涂层与防护1908-合

涂层与防护
第 40 卷第 8 期 Vol.40 No.8
Aug.2019
2019 年 8 月
COATING AND PROTECTION

无溶剂柔韧环氧树脂在金属表面烤漆中的应用性

能测试

1
张明星 , 李汉庭 2
（1. 中国煤炭科工集团杭州环保研究院, 杭州 311201； 2. 浙江德尔福新型建材有限公司, 浙江海盐 314312）

摘要：通过选择含柔韧聚氨酯链段的特殊环氧树脂及含柔韧聚醚链段的脂肪胺固化剂, 按优化的比例
配制涂料，样品在 180~230 ℃烘烤后能达到较高硬度 (>2H),在冲击后无裂纹、皱纹及剥落等现象，对铝金
属表面显示很强的附着力, 并显示较佳的耐弯折性能。 涂膜在沸水中都没有出现明显的起泡、起皱、开裂、
脱落等现象,只在经过冲击后的薄弱处出现局部开裂、脱落或起泡。 各项实验结果显示，含聚氨酯柔韧链段
的环氧树脂具有较佳的综合性能,而且本实验采用的制备聚氨酯-环氧树脂共聚物的方法较其他环氧树脂
的增韧方法简便直接。 涂料采用的环氧树脂和固化剂双组分体系在室温下具有足够的工作时间、但在高温
烘烤时能在 5~10 min 内达到充分固化。 在具有催化作用的固化剂存在时, 涂料在 200 ℃的固化时间可以
缩短至 2 min 以内。
关键词：环氧树脂; 金属表面烤漆; 增韧; 硬度;附着力; 耐冲击; 耐弯折; 耐高温水
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中图分类号：TQ630.7 2 文献标识码：A 文章编号：1672-2418(2019)08-0021-06

Property Evaluation of Solvent-Free Flexible Epoxy
Resins in Metal Surface Coating

1
Zhang Mingxing , Li Hanting 2
(1. Hongzhou Research Institute of China Coal Technology & Engineering Group, Hangzhou 311201,
China;2. Zhejiang Delft New Building Materials Co., Ltd., Haiyan, Zhejiang 314312, China)

Abstract: By selecting special epoxy resins containing flexible polyurethane segments and
aliphatic amine curing agents containing polyether segments, the coating materials exhibit high
hardness (pencil hardness >2H) after baking at 180-230 ℃. The coating samples show no cracking,
wrinkling and peeling after impact testing. The coating materials have high adhere on the metals
such as aluminum. Coating samples containing polyurethane segments in epoxy resins exhibit better

anti-bending properties. In boiling water, the coating samples show no obvious blister, wrinkling,
cracking and shedding, and only show local damage in samples with weakened areas after impact
testing. All experimental data show better overall properties from the urethane -containing epoxy
systems, achieved from a simpler and more straight -forward method to form urethane -epoxy
copolymers than other epoxy toughening methods. The two-component coating systems with epoxy
resins and curing agents possess adequate workable time at room temperature, but can be sufficiently
cured within 5-10 minutes under baking condition. Furthermore, in the presence of catalytic curing
agent, the cure time can be shortened to 2 minutes at 200 ℃.
Keywords： epoxy resins; metal surface coating; toughening; hardness; adhesion; impact
resistance; anti-bending; hot water resistance

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分析测试 ANALYSIS AND TEST