BITUMENS MODIFYING ADDITIVE Russian patent published in 2008 - IPC C08L95/00 C08L9/02 C08K5/09 

FIELD: petroleum product additives.

SUBSTANCE: additive comprises mixture of commercial synthetic rubber and special components. The former, linear-structure commercial synthetic rubber, is, in particular, granulated synthetic butadiene-nitrile rubber used in amount 17-22.5%. Special components are maleic anhydride, 7,5-10%, and liquid fraction of liptobiolite coal-tar resin having boiling temperature above 230°C, to 100%.

EFFECT: use of additive to prepare polymer-bitumen binder enables simultaneously increasing elasticity, temperature brittleness, and adhesion to metal and concrete.

2 cl, 1 tbl, 3 ex