公开(公告)号：US20170107152A1

公开(公告)日：2017-04-20

申请号：US15087539

申请日：2016-03-31

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Yufeng Xu ,  Eugene S. STIVENDER

IPC: C04B28/14 ,  E04B2/00 ,  E04C2/02 ,  E04D11/02 ,  E04D5/00

CPC classification number: C04B28/14 ,  C04B26/28 ,  C04B28/145 ,  C04B2111/00586 ,  C04B2111/00612 ,  C04B2111/0062 ,  C04B2111/1006 ,  C04B2111/1018 ,  D21J1/165 ,  E04B7/22 ,  E04C2/02 ,  E04C2/043 ,  E04C2/06 ,  E04C2/44 ,  E04D1/265 ,  E04D3/04 ,  E04D5/00 ,  E04D11/02 ,  E04D12/00 ,  Y02W30/97 ,  C04B14/185 ,  C04B18/24 ,  C04B24/38 ,  C04B24/42 ,  C04B40/006

Abstract: A roof cover board made from a mixture of 30-60% stucco; 20-50% perlite; 10-30% cellulose fiber; 3-20% starch; and siloxane. Also disclosed is a stucco-free roof cover board made from a mixture of 30-60% perlite, 30-60% cellulose fiber, 5-25% starch; and siloxane. Also disclosed are methods for making same.