COATINGS FOR GLASS REINFORCED FACED GYPSUM BOARD
    5.
    发明公开
    COATINGS FOR GLASS REINFORCED FACED GYPSUM BOARD 有权
    石膏板的方法

    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

    IPC分类号: B32B13/00 B32B1/04

    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.