Preparation method of composite polyurethane waterproof coating

• Main Author: AI XUSHENG
• Format: Patent
• Language: Chinese; English
• Published: 12.11.2019
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a composite polyurethane waterproof coating. The method comprises the followingsteps: firstly, preparing organic silicon microcapsules by taking polyvinyl alcohol and maltodextrin as wall materials and organosilane as a core material; then mixing tetraethoxysilane and calcium nitrate to perform a reaction, and preparing tricalcium silicate self-made filler by a sol-gel method; then mixing zinc nitrate, ferric nitrate and tetrabutyl titanate and carrying out a reaction to generate nano metal oxide filter residues in the presence of ammonia water; and finally, preparing the waterborne polyurethane emulsion. The polyurethane waterproof paint has the advantages of great mechanical ultraviolet aging resistance, thermo-oxidative aging resistance and waterproofness, durable waterproofness and wide application prospects. 本发明属于建筑材料技术领域，具体涉及一种复合聚氨酯防水涂料的制备方法。本发明首先以聚乙烯醇和麦芽糊精为壁材，以有机硅烷为芯材，制得有机硅微胶囊，接着将正硅酸乙