FIELD: rubber industry. SUBSTANCE: method involves preparing unsaturated rubber-base rubber mixture with conventional additions. Vulcanization accelerating agent - altax and/or sulfenamide "Ц" has product of interaction of 0.5-1.1 mole urea and 1.0 mole hexamethylenetetramine in the presence of 5.3% acid salts (not above). Ratio in mixture, mas. p.: rubber 100; altax 0.4-0.8 and/or sulfenamide "Ц" 0.2-0.94, and indicated product 0.2-1.34. Mixture is vulcanized at 155 C for 25 min. Rubber properties: conditional strength is 9.8-15.4 MPa; relative elongation is 210-65%; residual elongation is 8-20%, and hardness is 55-70 conditional units. EFFECT: enhanced quality of rubber mixture. 6 ex, 2 tbl
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