GYPSUM COMPOSITIONS OF IMPROVED RESISTANCE TO PERMANENT DEFORMATION Russian patent published in 2008 - IPC C04B28/14 E04C1/40 

FIELD: gypsum compositions and gypsum plates made from such compositions.

SUBSTANCE: proposed composition contains hardened gypsum, binding matrix made from hardened and calcined gypsum, water and modifying material containing mixture of organic poly- phosphonium compound or mixture of organic poly-phosphonium compounds in the amount of 0.01-3% of calcined gypsum and borate in the amount of 0.1-2% of mass of calcined gypsum containing ulexite, colemanite or mixture of ulexite and colemanite or modifying material containing poly-carboxyl compound or mixture of poly-carboxyl compounds in the amount of 0.01-4.99% of mass of calcined gypsum and poly-phosphate compound or mixture of poly-phosphate compounds in the amount of 0.004-2% of mass of calcined gypsum.

EFFECT: enhanced efficiency.

24 cl, 5 tbl