POLYMERIC COMPOSITION FOR PREPARING-PACKING MATERIAL Russian patent published in 1997 - IPC

FIELD: chemical technology, particularly, autotractor and petrochemical industries. SUBSTANCE: polymer composition comprises, wt.pts: butadiene-nitrile rubber, 100; vulcanizing sulfuric acid group, 5.0-15.2; stearin 0.5-3.0; dibutyl phthalate, 6.0-16.5; powdery filler, 140-330; glass and/or basalt fiber, 40-164; fiber selected from the group consisting of polyaramide, cellulose and carbon fiber, 40-100; polyvinyl alcohol, 0.4-3.3; polyvinyl chloride, 8.0-30.0. Characteristics of packing material compressibility at 35 MPa is 16.4-19.7 %; reprocibility after releasing pressure at 38 MPa is 69.8-73.2 %; conventional tensile strength in longitudinal direction is 200-23 MPa and in transversal direction is 10.7-12.6 MPa. Change in weight in oil MC-20 (at 180 C, 24 h) is 0.1 %, in kerosene (23 C 24 h) is 0.2-0.9 %; in diesel fuel (23 C, 24 h) is 0.4-0.8 %, density is 1. 80-1.93 g/cu.cm. EFFECT: improved properties of the polymeric composition. 2 tbl