| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aqueous polyurethane dispersion which excels in dispersibility, excels also in productivity (specifically reaction control is easy and the resultant polyurethane dispersion can be provided with stable quality to the market) and can provide a resin having such both properties as toughness and flexibility, and a method for producing the dispersion. <P>SOLUTION: Diphenylmethane diisocyanate containing 2,4'-diphenylmethane diisocyanate in a specific ratio or more and an aliphatic diisocyanate are used in a ratio within a specific range. <P>COPYRIGHT: (C)2010,JPO&INPIT |
