Patent ID: 11945751
Assignee: KNAUF GIPS KG
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 14:
15. The method of claim 13, wherein forming the aqueous gypsum slurry comprises:
mixing a mixture of:
100 parts by weight calcium sulfate hemihydrate;
0.5 to 5 parts by weight of siloxane polymerization catalyst, wherein the catalyst comprises (a) 55 wt % to 100 wt % of calcium alum inate cement and/or calcium sulfoaluminate cement and (b) 0 wt % to 45 wt % of magnesium oxide;
0.2 to 2 parts by weight of siloxane;
0.1 to 5 parts by weight gypsum setting accelerator;
0.1 to 2 parts by weight dispersant; and
50 to 150 parts by weight water;

depositing the aqueous gypsum slurry on a facing material;
shaping the aqueous gypsum slurry on the facing material into a panel;
allowing the aqueous gypsum slurry to set, thereby forming the core of the gypsum panel; and
allowing the polymerizing of the siloxane.