METHOD OF SUPERFICIALLY MODIFYING RUBBERS Russian patent published in 2001 - IPC

FIELD: rubber industry. SUBSTANCE: invention can be used in manufacture of mechanical-rubber products. Cured rubber based on carbochain rubbers is treated for 4-24 h with solution of reactive substance, in particular 2-mercaptobenzothiazole (1-2%) with sulfur (1-2%) in combination with phenol-formaldehyde resin with molecular weight 1000-2000 (8- 10%) and urotropin (0.5-1.0%), in organic solvent, which is further removed by drying. Material is then thermally treated at vulcanization temperature for 40-60 min. Products can be operated in corrosive media. EFFECT: increased oil resistance. 2 tbl, 2 ex