| abstract |
The invention provides an aqueous polyurethane coating agent and a preparation method and application thereof. The preparation raw materials of the aqueous polyurethane coating agent include the following components in parts by weight: 70-120 parts by weight of organosilicon-modified polyacrylate polyol, 5-40 parts by weight of polyisocyanate, 1-15 parts by weight of silane coupling agent, 0.5-10 parts by weight of hydrophilic chain extender, and 20-50 parts by weight of blocking agent. The water-based polyurethane coating agent has good storage stability, and the silicone-modified polyacrylate polyol and the silane coupling agent cooperate with each other and react with other components to form a stable cross-linking agent when the water-based polyurethane coating agent is formed into a film. The network can significantly improve the overall performance of the coating. The water-based polyurethane coating agent is suitable for use in textile materials, and the obtained coating has excellent water resistance and adhesion, high rubbing fastness and color fastness to soaping, and can meet the requirements of the water-based polyurethane coating agent in textiles. Application requirements. |