BITUMINOUS POLYMER MASTIC TRANSCOR FOR PIPES Russian patent published in 2002 - IPC

FIELD: protection of pipes and piping systems against corrosion, such as oil pipe lines, petroleum product pipe lines and gas pipe lines. SUBSTANCE: bituminous polymer mastic used for applying insulating anticorrosive coats contains bitumen, thermoelastoplastic and plasticizer. Divinyl styrene thermoelastoplastic is used as thermoelastoplastic and mixture of road and insulation or building bitumens, is used as bitumen; modifier is additionally introduced into mastic at the following content of components, mass-%: road bitumen, 10 to 50; insulation bitumen, 40 to 80 or building bitumen, 40 to 80, divinyl styrene thermoelastoplastic, 1 to 10; plasticizer, 1 to 6 and modifier, 1 to 7. EFFECT: improved quality of anticorrosive protection of pipe lines; increased service life of underground oil and gas pipe lines. 1 tbl, 3 ex