公开(公告)号：EP2406044A4

公开(公告)日：2013-06-19

申请号：EP10750241

申请日：2010-03-12

申请人： STATE OF QUEENSLAND ACTING THROUGH THE DEPT OF EMPLOYMENT ECONOMIC DEV AND INNOVATION ,  SOLVENTS AUSTRALIA PTY LTD

发明人： KENNEDY MICHAEL

IPC分类号： B27K3/36 ,  A01N25/02 ,  B27K3/50

CPC分类号： A01N25/02 ,  B27K3/086 ,  B27K3/36 ,  B27K3/50 ,  Y10T428/31986 ,  Y10T428/31989 ,  Y10T428/662 ,  A01N43/653 ,  A01N53/00 ,  A01N59/16 ,  A01N59/20

摘要： A non-supercritical method for impregnating a refractive timber substrate with an active agent, including preparing an impregnation fluid including a low boiling solvent (methane, ethane, propane, butane, isobutane, fluorinated hydrocarbons such as chlorodifluoromethane (R22), 1,1,1,2-tetrafluoroethane (R134a), 1,1,1-trifluoroethane (R143a), pentafluoroethane (R125), 1,1-difluoroethane (R152a) and difluoromethane (R32) and an active agent; contacting a refractive timber substrate (eg heartwood of radiata pine, spruce species; Douglas fir, fir, poplar, willow, sapwood of cypress pine and certain eucalypt and pine species such as heartwood of messmate, larch, western red cedar, European oak and American white oak) with said impregnation fluid in a liquid state in an impregnation chamber for a time sufficient to allow said fluid to penetrate the pores of said refractive timber substrate; and removing said impregnation fluid in a liquid state from said impregnation chamber and returning to a reservoir.