COMPOSITION FOR PREPARING SEALING MATERIAL (VARIANT THEREOF) Russian patent published in 1998 - IPC

FIELD: manufacture of sheet materials. SUBSTANCE: claimed composition comprises (wt %): 13-18 butadiene-nitrile rubber; 13-15 aramide or polyoxadiazole fibers; 0.5-0.8 sulfur; 0.2-0.3 2-mercaptobenzthiazole; 0.1-0.2 thiuram; 1.0-2.0 zinc oxide; 0.3-0.5 monoamide or diamide; 3.0-5.0 colloidal silicic acid; 0.1-0.5 polyvinyl alcohol; 5.0-10.0 basalt cotton; 10-15 chalk; 20-22 kaolin; and the alumina balance. Alternatively, claimed composition comprises (wt %): 13-18 butadiene- nitrile rubber; 13-15 aramide or polyoxadiazole fibers; 0.5-0.8 sulfur; 0.2-0.3 2-mercaptobenzthiazole; 0.1-0.2 thiuram; 1.0-2.0 zinc oxide; 0.3-0.5 amine monoamine or diamine; 3.0-5.0 colloidal silicic acid; 0.1-0.15 polyvinyl alcohol; 4.0-5.0 hydromica vermiculite; 5.0- 10.0 basalt cotton, 10.0-15.0 chalk; and the alumina balance. EFFECT: improved properties of the composition. 4 cl, 3 tbl