MODIFIED NATURAL CAOUTCHOUC, METHOD FOR THEREOF OBTAINING, RUBBER MIXTURE AND PNEUMATIC TYRE

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to modified natural caoutchouc, method for obtaining modified natural caoutchouc, rubber mixture, which includes modified natural caoutchouc, and pneumatic tyre, including rubber mixture. Modified natural caoutchouc has phosphorus content 200 ppm or less and the total content of sodium and potassium 350 ppm or less. Modified natural caoutchouc is obtained by saponification latex of natural caoutchouc with alkali and washing. Temperature in the process of saponification constitutes from 20 to 70 degrees Celsius, duration of saponification is from 3 to 48 hours.;EFFECT: invention provides fuel economy, resistance to abrasive wear and tan δ reduction.;14 cl, 4 tbl, 39 ex