Fluoride-free waterproof agent for textiles and preparation method of fluoride-free waterproof agent

The invention relates to the field of textile auxiliaries, in particular to a fluoride-free waterproof agent for textiles and a preparation method thereof, and the fluoride-free waterproof agent is prepared from the following raw materials in parts by weight: 20-30 parts of alcohol modified melamine, 2-3 parts of lignin cationic surfactant, 90-120 parts of alcohol with the carbon atom number of 15-20, 0.6-1.6 parts of acid and 100-500 parts of solvent soft water. According to the fluoride-free waterproof agent prepared by the preparation method disclosed by the invention, through the combined action of alcohol modified melamine and other components in a synergistic system, excellent water repellency is endowed to textiles, and the water repellency is not obviously reduced after multiple times of water washing. 本发明涉及纺织品助剂领域，尤其涉及一种纺织品用无氟防水剂及其制备方法，按重量份计，制备原料包括：醇改性三聚氰胺20-30份，木质素阳离子表面活性剂2-3份，碳原子数为15-20的醇90-120份，酸0.6-1.6份，溶剂为软水100-500份。本发明所制备的无氟防水剂通过醇改性三聚氰胺并协同体系内其他成分共同作用，赋予了纺织品优越的拒水性，且多次水洗后拒水性无明显下降。