4results about How to "Extend fire resistance time" patented technology

The utility model discloses a high-flame-retardant fireproof power cable, relates to the technical field of power cables, solves the problems that a device is only provided with a substance with water-blocking performance, does not have fireproof capability, and cannot keep a power supply line continuously, safely and stably running under a flame condition, and comprises a first cable. According to the utility model, the outer side of the cable is sleeved with the low-smoke halogen-free polyolefin sheath, so that the wire cable can be protected when a fire disaster occurs, the harm of harmful substances such as smoke and toxic gas generated by the wire cable in the fire disaster to a human body is reduced, the transmission performance of the wire cable is ensured, the fire-resistant time is further prolonged, and the service life of the wire cable is prolonged. And the cross-linked polyethylene insulating layer is protected by the flame-retardant sheath layer, so that the flame-retardant time is further prolonged, the cable has higher fire resistance, and the problems that the device is only provided with a water-blocking substance, does not have fire resistance and cannot keep a power supply line continuously, safely and stably running under a flame condition are solved.

The invention provides an epoxy fireproof coating and a preparation method thereof, and belongs to the technical field of coatings. Comprising a component A and a component B. The component A comprises, by weight, 20-30 parts of silane modified novolac epoxy resin, 5-9 parts of an epoxy reactive diluent, 5-10 parts of aluminum hydroxide, 5-8 parts of melamine, 25-48 parts of ammonium polyphosphate, 0.5-1 part of expanded graphite, 6-8 parts of alumina fiber, 3-10 parts of barium sulfate, 3-5 parts of modified alumina and 2-5 parts of titanium dioxide. The component B is prepared from 40 to 50 parts of phenolic aldehyde amine and 50 to 60 parts of 1, 3-cyclohexanedimethylamine. The coating provided by the invention at least integrates fire prevention performance, corrosion resistance in a marine environment and normal-temperature curing performance, and is applied to fire steel structure fireproof and corrosion-resistant coatings of marine oil and gas platforms, petrochemical plant devices and the like.

This invention belongs to the field of cable technology, and specifically discloses a curve-heat-rise fire-resistant power cable. The curve-heat-rise fire-resistant power cable includes a sheath layer comprising an outer sheath and an inner sheath arranged sequentially. The inner sheath comprises the following raw materials: methyl vinyl silicone rubber, a refractory composition, silica, tetramethyldivinyldisiloxane, epoxidized soybean oil acrylate, a heat stabilizer, an accelerator, and a diphenylsulfonate. The refractory composition comprises modified ceramic material, sulfonate flame retardant, and polyarylene ether nitrile in a mass ratio of (45~52):(25~38):(17~23). This application uses ceramicized silicone rubber material as the inner sheath and a specific mass ratio of modified ceramic material, sulfonate flame retardant, and polyarylene ether nitrile as the refractory composition, significantly improving the high-temperature resistance, excellent thermal stability, and excellent fire resistance of the power cable, effectively increasing the fire resistance time of the power cable under the temperature rise curve.

This invention provides a flame retardant for water-based fire-retardant coatings for steel structures, prepared from the following raw materials: urea, phosphoric acid, acidic lignin, and pentaerythritol; the weight ratio of urea, phosphoric acid, acidic lignin, and pentaerythritol is 1:(0.8-1):(0.1-0.5):(0.01-0.05). Applying this flame retardant to water-based fire-retardant coatings for steel structures achieves both moisture resistance and flame retardancy.