公开(公告)号：US11111174B2

公开(公告)日：2021-09-07

申请号：US15988974

申请日：2018-05-24

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Wei Xu ,  Derrick Hutchinson ,  Christopher J. Rokke ,  Lori Tuttle ,  Michael J. Hough

IPC: C03C14/00 ,  C03C25/47 ,  B32B19/04 ,  B32B19/06 ,  B32B5/02 ,  E04D11/02 ,  C03C25/26 ,  E04D13/16 ,  C04B26/28 ,  C03C25/321 ,  D21J1/16 ,  C04B26/02 ,  C04B111/00

Abstract: Composite roofing structures can include mineral fiber roof cover boards with high concentration of mineral wool or mineral wool and perlite. The roofing structure may include: a roof cover board including a dried base mat including: 8-25% mineral wool, 40-65% perlite, 9-15% binder, 9-15% cellulosic fiber, and 0.25-2% sizing agent, all % by weight; an insulation layer; and a roofing membrane. The roof cover board is over the insulation layer, the roofing membrane is over the roof cover board. The roof cover board is attached to the insulation layer. The roofing membrane is attached to the roof cover board. Alternatively dried base mat may include: 30-70% mineral wool, 10-50% perlite, 5-15% binder, 2-20% cellulosic fiber, and 0.25-2% sizing agent. Alternatively the dried base mat may include: 60-90% mineral wool, 0-10% fiber, 0-10% perlite, 4-10% binder, 0-5% gypsum, and 0.25-2% sizing agent.