FIRE-RESISTANT SELF-QUENCHING CABLE OR WIRE Russian patent published in 2006 - IPC H01B13/24 C08J5/00 

FIELD: motor- and ship-building industries, mechanical and construction engineering, oil extraction, and oil-refining industry.

SUBSTANCE: proposed electric wire or cable has multicore copper conductor with core sectional area of 1.0 to 50 mm² and rubber sheath, 0.4 to 7.0 mm thick, made of composite material based on rubber mixture incorporating mixture of high-molecular polymethylvinylsiloxane rubber and low-molecular polymethylvinylsiloxane rubber as polymeric matrix with molar mass of 20 000 to 70 000 in combination with probably stearic acid, fire-protective filler, dehydrating agent, silica powder, quartz crystal, anti-structuring agent (α, ω-dihydroxydimethylsiloxane), organic peroxide, and water repellant (silicone liquid). Composite material is applied by extrusion at a rate of 0.2-2 m/s and cured in radiation-chemistry curing mode under action of either vapor at pressure of 12-18 at or cobalt gun using gamma-ray source at dose rate of 2.5-20 Mrad, and/or by thermal curing. Electric cable or wire covered with such sheath is characterized in ability of self-quenching fire and can be used at temperatures ranging between -60 and +300 °C.

EFFECT: enhanced crack, oil, and gasoline resistance, flexibility, and electrophysical characteristics of cable or wire.

3 cl 1 tbl