| 摘要 |
PURPOSE: A preparation method for crosslinked polyurethane film dispersed with silver particles in nano-scale, is provided by using amphiphilic nonionic polyurethane precursor, with lower cost. CONSTITUTION: The preparation method for crosslinked polyurethane film comprising nano-scale silver particles comprises mixing silver nitrate with a mixture of amphiphilic urethane acrylate oligomer having a chemical structure of A-B-C-B-A and hydrophobic monomer such as styrene, methyl methacrylate, hydroxy methacrylate and hydroxy acrylate, etc. to give a homogeneous solution, and copolymerizing the mixture. In the formula, A is a compound having both double bond and hydroxy group, including any one of hydroxy methacrylate and hydroxy acrylate; B is a compound having at least two isocyanates capable of forming an urethane bond with A, including any one selected from a group consisting toluene diisocyanate, isophorone diisocyanate and methylene diisocyanate; and C is a compound having two or more, or three or more hydroxy groups capable of forming an urethane bond with isocyanate, including polypropylene glycol.
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