The flame-retardant optical fiber filling paste for the optical cable has the main characteristics of high thixotropic index, high and low temperature resistance and flame retardance, and can ensure that the optical fiber in a loose sleeve and the cable core in a cable can be always. The flame-retardant optical fiber filling paste for the optical cable has the main characteristics of high thixotropic index, high and low temperature resistance and flame retardance, and can ensure that the optical fiber in a loose sleeve and the cable core in a cable can be always. BASF is offering an innovative Ultradur ® portfolio to fulfill the specific requirements of the market: Ultradur ® B 6560 LN for high productivity, Ultradur ® B 6550 LNX for very thin diameters, Ultradur ® B 6551 LNI R01 for dry tubes and our flame retardant Ultradur ® B 4440. Our excellent. The invention relates to a flame-retardant optical fiber filling paste for an optical cable, which mainly comprises base oil, an oil separation inhibitor, an antioxidant, an organic thickening agent, an inorganic thickening agent, an organic flame retardant and an inorganic flame retardant. To ensure compliance to these requirements, a. The main application of flame retardant and fire-resistant optical cable, generally by selecting excellent flame retardant sheath material to improve the flame retardant performance of the optical cable, but the non-flame retardant materials such as sleeve, fiber paste, grease in the optical cable. In this paper, a kind of flame retardant and fire-resistant optical cable is prepared with ceramic sheathing materials. Its structure is mainly composed of cable core, longitudinal covering a layer of two-sided synthetic mica tape outside cable core, inner sheath packed with ceramic sheathing. onal during fire. The cable has a design that ensures operation for more than 3 hours in fi es up to 1000 °C. In addition, also with water spray and.