A kind of insulating flame-retardant EPDM rubber hose composition and preparation method thereof

Abstract

An insulating and flame-retardant EPDM rubber hose composition of the present invention is characterized in that it comprises, in parts by weight: EPDM5890F, 100 parts; kaolin, 2-6 parts; zinc oxide, 3-8 parts; stearin Acid 1‑3 parts; Paraffin, 2‑5 parts; Antiaging agent MB, 1‑3 parts; Carbon black SP6400A, 50‑70 parts; Flame retardant, 130‑190 parts; Paraffin oil, 10‑30 parts; Sulfur, 1-2 parts; calcium oxide, 10-15 parts; accelerator 1.6-3 parts; the accelerator includes 0.5-0.8 parts of BZ accelerator, 0.7-1.2 parts of TRA accelerator, 0.2-0.5 parts of DM accelerator and 0.2-0.5 parts of accelerator TT; the flame retardant is 80-100 parts of aluminum hydroxide, 20-40 parts of zinc borate, 10-20 parts of antimony trioxide and 20-30 parts of decabromodiphenyl Another object of the present invention is to provide a method for preparing an insulating flame-retardant EPDM rubber hose composition, which satisfies the mechanical strength requirements of the rubber under the premise of satisfying the electrical insulation and insulation resistance of the vulcanized rubber.

Description

technical field [0001] The invention belongs to the technical field of rubber, in particular to an insulating and flame-retardant EPDM rubber hose composition and a preparation method thereof. Background technique [0002] The rubber hose is one of the rubber products used in the car wiring of the EMU, which is located inside and outside the car. The inside of the hose wears various wires. The hose mainly protects the internal cables. The protection can be divided into protection under the action of mechanical external force. In addition, it is also necessary to protect the internal cables from external heat sources. As we all know, three Ethylene-propylene-diene rubber (EPDM) is a copolymer of ethylene, propylene and a small amount of non-conjugated diene, because of its excellent electrical insulation, low density, high filling, low temperature resistance, heat resistance, ozone resistance and Properties such as weather aging have been widely used, accounting for about 7%...

AI Technical Summary

Problems solved by technology

The inside of the hose wears various wires. The hose mainly protects the internal cables. The protection can be divided into protection under the action of mechanical external force. In addition, it is also necessary to protect the internal cables from external heat sources. As we all know, three Ethylene-propylene-diene rubber (EPDM) is a copolymer of ethylene, propylene and a small amount of non-conjugated diene, because of its excellent electrical insulation, low density, high filling, low temperature resistance, heat resistance, ozone resistance and Weather aging and other properties have been widely used, accounting for about 7% of the world's total synthetic rubber consumption, ranking third, but poor flame retardant performance and poor insulation performance

[0003] We know that EPDM rubber is a non-self-reinforcing rubber, so if you want to make EPDM rubber achieve a certain mechanical strength, you must add carbon black for reinforcement. However, carbon black is a conductive material. The proportion of carbon black in EPDM rubber increases, the mechanical properties increase but the insulation properties decrease

[0004] At present, the flame retardant properties of rubber hose compositions usually use halogen flame retardants, which have the advantages of low dosage, high flame retardant efficiency and wide adaptability, but their serious disadvantages are that they generate a lot of smoke and are toxic and corrosive when burned. gas, very dangerous

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