The method of the synthesis of blocked polyisocyanates (bPIC) used as a crosslinking agent for hydrophobic and low temperature curing powder coatings was developed. In the synthesis of polyisocyanates (PIC) isophorone diisocyanate, glycerine, xylitol, polyethylene glycol and polysiloxane KF-6000 as well as two different blocking agents, i.e. acetone oxime and butanone oxime were used. The chemical structure of the obtained blocked polyisocyanates was confirmed by IR and NMR spectroscopy and the molecular mass distribution was investigated using gel permeation chromatography (GPC). The thermal behavior and the deblocking process were investigated by means of TG, DSC and DMA. The obtained coatings were evaluated by performing the following tests: roughness, gloss, scratch resistance, hardness, adhesion to the steel and water contact angle. As part of this research, the hydrophobic and high scratch resistance coatings cured at 150 °C were developed.

开发了用作疏水和低温固化粉末涂料交联剂的封闭多异氰酸酯 (bPIC) 的合成方法。在多异氰酸酯 (PIC) 异佛尔酮二异氰酸酯的合成中，使用了甘油、木糖醇、聚乙二醇和聚硅氧烷 KF-6000 以及两种不同的封端剂，即丙酮肟和丁酮肟。所得封闭多异氰酸酯的化学结构通过红外光谱和核磁共振光谱确定，分子质量分布通过凝胶渗透色谱（GPC）进行研究。通过TG、DSC和DMA研究了热行为和解封闭过程。通过进行以下测试来评估获得的涂层：粗糙度、光泽度、抗划伤性、硬度、对钢的附着力和水接触角。