| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing a fine particle-dispersed polyol which is small in particle diameters of the polymer fine particles dispersed in the polyol, and in using in polyurethane resin imparts a fine particle dispersed polyol excellent in resin properties. <P>SOLUTION: Disclosed is a method for producing a fine particle-dispersed polyol (I) comprising the step (1) and the step (n-1) described below. This method for producing a fine particle-dispersed polyol (I) is characterized in that the volume average particle diameter (R1) of fine particles (P1) is 0.01-1.0μm, and an ethylenically unsaturated monomer (b) in the step (1) has a concentration of 7-40 (wt.%). Step (1), a step for obtaining a fine particle-dispersed polyol intermediate (B2) by polymerizing an ethylenically unsaturated monomer (b) in a polyol (a) in the presence of fine particles (P1) and a radical polymerization initiator (c). Step (n-1), a step for obtaining a fine particle-dispersed polyol intermediate (Bn) or a fine particle-dispersed polyol (I) by polymerizing an ethylenically unsaturated monomer (b) in a fine particle-dispersed polyol intermediate (B(n-1)) in the presence of a radical polymerization initiator (c) (n represents an integer of 3-7). <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
