| abstract |
The invention relates to the field of coatings, and discloses a modified polyurethane fireproof water-based coating and a preparation method thereof, wherein the coating comprises the following components: 20-40 parts of modified waterborne polyurethane, 5-15 parts of waterborne pigment, 5-15 parts of pigment dispersion glue, 5-15 parts of filler, 0.1-0.5 part of defoaming agent, 0.1-0.5 part of film-forming assistant and 30-50 parts of water. The preparation method comprises the following steps: (A) preparing uronic acid oligomers; (B) preparing waterborne polyurethane; (C) calcium salt modification; (D) pulping; (E) and (5) mixing the slurry. The water-based paint disclosed by the invention can realize a better fireproof effect on the basis of not adding a flame retardant, and has good dispersibility, stability and film-forming property. |