| abstract |
The invention relates to a method for preparing self-cross linking type water-based acrylic resin and polyurethane hybrid, comprising the following process: (1) unsaturated hydroxyl-terminated polyester is synthesized after the polycondensation of trimethylolpropane monoallyl ether, polyhydric alcohol and polybasic acid; (2) the unsaturated hydroxyl-terminated polyester is used as the soft segment of polyurethane, dihydric alcohol, hydrophilic monomer and isocyanate are added to the polyurethane to react with the polyurethane to prepare unsaturated double-linked water-based polyurethane; and (3) the water-based acrylic resin and polyurethane hybrid in nucleocapsid structure is polymerized from the unsaturated double-linked water-based polyurethane used as surface active agent and the acrylic resin used as monomer by emulsifier-free emulsion. The unsaturated double-linked water-based polyurethane and fluorine-contained acrylic resin are grafted innovatively, and the synthesized environmentally-friendly resin has the excellent performance of both the acrylic resin and polyurethane resin and can be widely used as the base material of water-based woodenware coating, building coating and metal coating. |