长效疏油、疏水耐沾污涂层材料的制备

Preparation of long-term hydrophobic and oleophobi stain-resistant coating materials

通过对不同有机硅耐高温树脂以及表面抗污助剂的筛选,研制了一种单组分、低表面能的耐沾污涂层,确定了较佳的工艺条件:C型氟改性有机硅树脂100g,表面抗污剂KW31.5g,230°C固化20min。与市售产品进行比较,对此条件下制备的涂层进行了耐高温和人工加速老化试验,测试了涂层的综合性能。结果表明,所制备的涂层外观平整、光滑,附着力1级,铅笔硬度6H,冲击强度50kg·cm,水接触角106°,油珠流动时间26s,经过人工加速老化800h以及在300°C下加热72h后,涂层仍具有良好的疏油、疏水特性。

A one-component stain-resistant coating with low surface energy was prepared by selecting different heat- resistant organic silicones and surface anti-staining agents. The optimal process conditions were ascertained as follows： C-type fluorine-modified organic silicone resin 100 g and surface anti-staining agent KW3 1.5 g, curing at 300 ~C for 20 min. The coating prepared under the above conditions was compared with a commercially available product based on the high temperature resistance and artificial accelerated aging test results, and the comprehensive performance of the coating was determined. The results showed that the prepared coating has uniform and smooth appearance with adhesion strength 1 grade, pencil hardness 6H, impact strength 50 kg.cm, water contact angle 106° and oil drop sliding time 26 s. The coating has good hydrophobicity and oleophobicity after artificial accelerated aging for 800 h and heating at 300 ℃ for 72 h.