| abstract |
A water-based polyurethane resin and a preparation method thereof belong to the technical field of polymer materials, and include the following substances in parts by weight: 160-330 parts of polymer polyol, 20-40 parts of castor oil, and 2-5 parts of organic montmorillonite, 0.5-1.2 parts of silane coupling agent, 56-100 parts of polydiisocyanate, 7.2-14.8 parts of methylol, 7-21 parts of hydroxyl type small molecule polyol, 0.2-0.4 parts of catalyst, 80-140 parts of acetone, medium 5.5-7.5 parts of neutralizer, 600-1120 parts of deionized water, and 8-15 parts of auxiliary. In the invention, the intercalation modification reaction of the silane coupling agent and the montmorillonite is carried out, so that the lamellar spacing of the montmorillonite is opened, which is more conducive to the intercalation of the polymer chain, and at the same time, the compatibility between the water-dispersed montmorillonite and the organic phase is made. It has better properties, which is conducive to the stability of the emulsion, and at the same time enhances the water and alkali resistance of the material. |