公开(公告)号：EP2355976B1

公开(公告)日：2016-03-16

申请号：EP09832416.3

申请日：2009-12-04

申请人： BPB Limited, A U.K. Corporation

发明人： HENNIS, Mark, E. ,  SANDERS, Christopher, J. ,  FAHEY, Michael, P. ,  BOYDSTON, Gerald, D. ,  HAUBER, Robert, J.

IPC分类号： B32B13/00 ,  B32B1/04

CPC分类号： B28B3/123 ,  B28B19/0092 ,  E04C2/043 ,  Y10T428/24355 ,  Y10T428/24802 ,  Y10T428/24851

公开(公告)号：EP2355976A1

公开(公告)日：2011-08-17

申请号：EP09832416.3

申请日：2009-12-04

申请人： BPB Limited, A U.K. Corporation

发明人： HENNIS, Mark, E. ,  SANDERS, Christopher, J. ,  FAHEY, Michael, P. ,  BOYDSTON, Gerald, D. ,  HAUBER, Robert, J.

IPC分类号： B32B13/00 ,  B32B1/04

CPC分类号： B28B3/123 ,  B28B19/0092 ,  E04C2/043 ,  Y10T428/24355 ,  Y10T428/24802 ,  Y10T428/24851

摘要： A coating method for gypsum board comprising forming a gypsum board entrained with polymer additive in a surface layer, applying a preferably acrylic primary coating, curling and drying, and passing the gypsum board through a first roll coater wherein a second fluid coating is deposited over the primary layer, which forms a chemical bond with the entrained polymer, and a chemical bond with the second fluid coating. A coating material which can form copolymer bonds with the second coating is then deposited on the same, then dried and cured, resulting in coated gypsum board having a low surface tension surface, essentially impermeable to water, vapor or moisture penetration. In another aspect, at least one polymer additive entrained in a surface layer of the gypsum board and capable of forming a copolymer bond with a second coating is applied either on-line or off-line from the gypsum board formation line.