Waterborne extinction polyurethane resin and preparation method thereof
A polyurethane resin, water-based technology, applied in the field of water-based polyurethane resin, can solve the problems of poor scratch resistance, loss of matting effect, and inability to achieve the use effect, and achieve good wear resistance and scratch resistance, not easy to deform, and high extinction. Effect
Inactive Publication Date: 2016-06-22
ZHEJIANG SUNLIGHT MATERIAL TECH CO LTD
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The invention discloses a water-based matting polyurethane resin and a preparation method thereof, comprising macromolecular polyols, hydrophilic diols, small molecule diols, diisocyanates, catalysts, salt-forming agents, amine chain extenders, and deionized water , Thickener. The preparation includes the following steps: step a: add macromolecular diol into the reaction kettle, and vacuum dehydrate at 100°C for 1 hour; step b: add co-solvent, diisocyanate, small molecular polyol and hydrophilic diol; step c: React at 70-90°C for 3-6 hours; Step d: After adding triethylamine to form a salt, add deionized water to emulsify into an emulsion while stirring; Step e: Add amine chain extender; Step f: Add thickener to adjust Viscosity: The prepared water-based polyurethane resin has a high matting degree, no additional matting powder is needed, and the obtained matting coating film is good in abrasion resistance and scratch resistance.
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