| 摘要 |
<p>A method for preparing a polyurethane which has good long term flexibility, solvent resistance and resistance to hydrolysis, said method comprising mixing three components just prior to curing said components comprising a prepolymer solution, a cement solution and a crosslinking solution, said crosslinking solution comprising a solvent, an aromatic diamine and the ketimine of an aliphatic diamine.</p> |
