BITUMEN-POLYMER MASTIC AND A METHOD FOR PREPARATION THEREOF Russian patent published in 2007 - IPC C08L95/00 F16L58/12 

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to composite building materials suitable as insulators in construction and maintenance of underground oil pipelines, petroleum product pipelines, and gas lines in summer and winter periods. Mastic according to invention contains, wt %: insulation bitumen (BNI-4) 51.0, building bitumen (BN-70/30) 40.7, divinylstyrene thermoplastic elastomer (DST-30R-01) 2.5, petroleum-origin plasticizing oil (PN-6Sh) 3.5, stearic acid (T-18) 0.8, and emulsifying surface active auxiliary substance (OP-10) 1.5. Mastic is characterized by being plastic to as low temperature as -28°C and can be used both for manufacturing insulating tape materials and to formation of insulation coating directly on pipelines.

EFFECT: increased plasticity and the same high degree of adhesion to steel, pain primer, and polymer tape.

2 cl