ADHESIVE ADDITIVE FOR BITUMEN AND BITUMEN-POLYMER COMPOSITIONS Russian patent published in 2010 - IPC C08L95/00 

FIELD: chemistry.

SUBSTANCE: adhesive additive based on maleinised low molecular weight polybutadiene contains bound maleic anhydride in amount of 21.5-33 wt %, alkenyl succinic anhydride as described in claim 1, with weight ratio of maleinized low molecular weight polybutadiene: alkenyl succinic anhydride equal to 25-85:75-15. The range of batching said adhesive additive per bitumen composition equals 0.4-0.8 wt %. When using the additive, there is no need for pre-mixing the adhesive additive with thermoplastic. Owing to this, the bitumen composition is prepared in a single step. The polymer-bitumen composition with an additive is characterised by high level of adhesion of mineral filler to alkaline and acidic mineral filler.

EFFECT: adhesive additive is characterised by dynamic viscosity of 0,2-1,0 Pa·s, can be easily batched and has good distribution in the bitumen composition.

1 tbl, 10 ex