With the rapid development of color board industry, the development of color board coatings with excellent performance to meet the needs of advanced and diversified products has become a research hotspot at home and abroad. It is very important to prepare the primer with good adhesion and flexibility, and good compatibility with the topcoat to improve the performance of color board coatings.

用电镀锌板为基板，涂上有机涂料烘烤所得的产品为电镀锌彩涂板，由于电镀锌板的锌层薄，通常含锌量为20/20g/m2，因此该产品不适合使用在室外制作墙、屋顶等。但因具有美丽的外观和优良的加工性能，因此主要可用于家电、音响、钢家具、室内装璜等。

The galvanized sheet is used as the base plate, coated with organic coating, and the product is galvanized color coated sheet. Because the zinc layer of galvanized sheet is thin, the zinc content is usually 20 / 20g / m2, so the product is not suitable for outdoor production of walls and roofs. But because of its beautiful appearance and excellent processing performance, it can be mainly used in household appliances, audio, steel furniture, interior decoration, etc.

由于影响因素多，底漆的配制是一个复杂的过程。国内已有科研人员采用正交实验法确定各个因素对环氧底漆性能的影响，从而用较少步骤合理地确定出好的配方，所制得漆膜具有明显的硬度和耐溶剂性的优势，同时附着力性能也好的。据介绍，他们重 点研究了选取颜基比、交联剂用量、催化剂、消泡剂、降低表面活性助剂、湿润分散剂6种影响因素。

Due to many factors, the preparation of primer is a complex process. Domestic researchers have used orthogonal experiment method to determine the influence of various factors on the performance of epoxy primer, so as to reasonably determine a good formula with less steps. The prepared film has obvious advantages of hardness and solvent resistance, and good adhesion. According to experts, they focused on the selection of pigment base ratio, amount of crosslinking agent, catalyst, defoamer, surfactant reducing agent and wetting dispersant.

15%时除了硬度和其它3水平相同外，其它性能都较差；20%时耐MEK擦拭性能和弯曲性能都好，附着力一般(均值1.3)；25%时漆膜的耐MEK擦拭性能和硬度好，另外2种性能较差。

At 15%, the hardness is the same as the other three levels, but the other properties are poor; At 20%, the MEK Resistance and bending performance were good, and the adhesion was average (1.3); The MEK wiping resistance and hardness of the film are better when the content is 25%, while the other two are worse.

考虑到彩板的可加工性，科研人员选择交联固化剂用量20%。表示，上述研究开了个好头，但还需深入研究，从而真 正突破彩涂板用环氧底漆瓶颈。实验中4种用量对硬度的影响不明显(均值都为5.0)；交联固化剂用量10%时附着力好(均值达到了0.3)，耐MEK擦拭性能相对较差一些，弯曲性能较好。

Considering the processability of color board, researchers choose the dosage of crosslinking curing agent 20%. Experts said that the above research has made a good start, but further research is needed, so as to truly break through the bottleneck of epoxy primer for color coated boards. In the experiment, the effect of four kinds of dosage on hardness is not obvious (the average value is 5.0); When the amount of crosslinking curing agent is 10%, the adhesion is good (the average is 0.3), the MEK Resistance is relatively poor, and the bending property is better.