公开(公告)号：EP2337807A1

公开(公告)日：2011-06-29

申请号：EP09740312.5

申请日：2009-10-20

申请人： Dow Global Technologies LLC

发明人： KRAMER, Hans ,  PARENTI, Vanni

IPC分类号： C08G18/48 ,  C08J9/14 ,  C08G18/76

CPC分类号： C08G18/4018 ,  C08G18/4208 ,  C08G18/482 ,  C08G18/5027 ,  C08G18/6644 ,  C08G18/6677 ,  C08G2101/0025 ,  C08G2101/005 ,  C08G2105/02 ,  C08J9/141 ,  C08J9/146 ,  C08J2205/052

摘要： A process for preparing a cavity-filling, fast-gelling closed cell rigid polyurethane foam comprises preparing a formulation including at least a polyisocyanate, a relatively high viscosity polyol system including at least about 10 percent by weight of an amine-initiated polyol, a physical blowing agent, a blowing catalyst and a curing catalyst, and, optionally, less than about 1.6 weight percent of water based on the polyol system. Other conventional components, such as a chain extender and/or crosslinker, surfactant, and the like may also be included. The formulation is injected under a reduced atmospheric pressure to achieve a closed cell, rigid polyurethane foam having a density of less than about 40 kg/m
3 , an average cell diameter of less than about 250 microns, and a thermal conductivity of less than about 19 mW/mK at 10°C average plate temperature.