VULCANIZABLE RUBBER MIXTURE Russian patent published in 1997 - IPC

FIELD: rubber industry. SUBSTANCE: method involves mixing the following components in mixer at 70-80 C, mas. p. p.: rubber crumb based on "HK", 100; sulfur, 3; 2-mercaptobenzthiazole, 1.5; and vat product of 2,4-toluyleneamine rectification, 20. Mixture is pressed as plates: thickness is 2 mm at 160 C x 10 min, 35 mm at 160 C x 70-80 min or at 180 C x 60 min. Properties: rupture resistance is 4.5 MPa, elongation is 80-90%, hardness is 68-75 conventional units. EFFECT: improved method of making, enhanced quality if mixture. 1 tbl