Rainproof and fireproof ceramifiable polyolefin material and preparation method thereof

Abstract

The invention discloses a rainproof ceramifiable polyolefin material. The rainproof ceramifiable polyolefin material is prepared from 50-80 parts of polyolefin, 20-50 parts of rubber mixings of silicone rubber, 80-120 parts of high-temperature-resistant packings, 10-30 parts of a halogen-free flame retardant, 20-40 parts of a ceramic formation sintering aid, 0.01-1 part of a platinum complex or aplatinum compound (in terms of platinum), 1-5 parts of a compatilizer and 0.5-1 part of a cross-linking agent. The invention further discloses a preparation method of the material. The preparation method comprises following steps: polyolefin and silica gel are blended, and the various packings are mixed, aged and vulcanized. The rainproof ceramifiable polyolefin material has excellent mechanical strength and fireproof performance, the surface of formed ceramic is hydrophobic, water can be effectively prevented from permeating into the ceramic, reduction of insulating property due to water absorption after firing ceramic formation of the material can be prevented effectively, the cost of the material is lower than that of ceramifiable silicone rubber, the fireproof performance of the material is higher than that of a common ceramifiable polyolefin material, and the rainproof ceramifiable polyolefin material has great significance when applied to the field of fireproof cables.

Description

technical field [0001] The invention relates to a rain-proof and fire-proof porcelain-able polyolefin material and a preparation method thereof, belonging to the field of fire-resistant cables. Background technique [0002] Fire-resistant power and signal cables are critical to the rescue of people and property in the event of a fire. At present, most of the refractory cables at home and abroad are magnesium oxide mineral cables and mica wrapped cables. Magnesium oxide mineral cables are very expensive, and the length of a single cable is limited, making it difficult to promote the use of civil buildings. Mica-wrapped cables require multiple layers of winding during the production process. After fire, the mica tape becomes brittle and easy to fall off, which also results in poor fire resistance, making it difficult to ensure safe and smooth communication and power in case of fire. [0003] Porcelainable polyolefin material is a new type of fireproof material, which can be ...

AI Technical Summary

Problems solved by technology

For example: Chinese invention patent CN 105367965 introduces a halogen-free flame-retardant ceramic polyolefin cable compound, which mainly solves the problem that ceramic polyolefin needs to be extruded by special extrusion equipment, and the process is relatively complicated; the invention patent CN106009140 is mainly Solve the problem that the strength of the ceramic body after ceramic polyolefin is not high enough to further meet the rapidly growing requirements of refractory cables; the invention patent CN 107488294 is mainly made by adding porous / layered aluminosilicates synthesized by natural or natural clay and combined Cooperate with surface activation treatment agent to further reduce the material cost and lower the porcelain forming temperature of ceramicized polyolefin

However, an important disadvantage of porcelainable polyolefin materials compared with porcelainable silicone rubber materials is the water absorption problem of the ceramic body after being porcelained. The resulting rain may cause the ceramic body to lose its insulation due to water absorption, thereby affecting the reliability of the fire-resistant cable

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