LIGHT GYPSUM BOARD AND GYPSUM SUSPENSION COMPOSITION FOR MAKING SAID BOARD Russian patent published in 2011 - IPC C04B28/14 C04B24/38 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention relates to a gypsum suspension, light gypsum board in which the core is made from said suspension and a method of making said gypsum board. The gypsum suspension contains gypsum, water and starch with Brookfield viscosity of not more than 60 cP at temperature lower than 60°C and Brookfield viscosity greater than 10000 cP at temperature from 70°C. The gypsum board has a core made from the solidified gypsum suspension described above. The method of making the gypsum board includes the following steps: preparing gypsum suspension by mixing its components in a mixer; depositing the obtained suspension onto at least one facing sheet, shaping the sheet into a belt and, optionally, covering the top surface of the suspension with a second facing sheet, if needed, moulding the edges of the obtained tape into profile strips, hydraulic setting of the gypsum on the production line when the tape moves in a belt conveyor. The invention is developed in subclaims.

EFFECT: high mechanical strength.

19 cl, 2 ex, 3 tbl