Application of Magnesium Hydroxide/Diphenoxy Phosphate in Silicone Rubber Flame Retardant Cable Material

Deketoxime–type room–temperature vulcanized silicone rubber cable materials were prepared using α, ω–dihydroxy polydimethylsiloxane, carbon black, calcium carbonate, magnesium hydroxide, piperazine bis (diphenoxy phosphate) salt (PBDP), and melamine diphenoxy phosphate (MDP). The effects of carbon b...

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Bibliographic Details
Published in:Coatings (Basel) 2023-05, Vol.13 (5), p.934
Main Authors: Wang, Wei, Yang, Fan, Lu, Yunlai, Luo, Zhi, Li, Fangya, Wu, You, Zhang, Jianbing, Xiao, Zufeng, Li, Wei, Qin, Caiqin
Format: Article
Language:English
Subjects:
Aluminum
Calcium carbonate
Carbon
Carbon black
China
Coatings
Curing
Dielectric properties
Dielectric strength
Electric fields
Electrical insulation
Energy conservation
Enthalpy
Fire resistant materials
Flame retardants
Heat
Heat release rate
Hydrocarbons
Hydrogen
Magnesium hydroxide
Mechanical properties
Melamine
NMR
Nuclear magnetic resonance
Phosphates
Phosphorus
Polydimethylsiloxane
Polymers
Protective coatings
Rubber
Rubber coatings
Shear strength
Silicone rubber
Silicones
Slaked lime
Temperature
Tensile strength
Thermal radiation
Viscosity
Wire
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Summary:Deketoxime–type room–temperature vulcanized silicone rubber cable materials were prepared using α, ω–dihydroxy polydimethylsiloxane, carbon black, calcium carbonate, magnesium hydroxide, piperazine bis (diphenoxy phosphate) salt (PBDP), and melamine diphenoxy phosphate (MDP). The effects of carbon black and flame retardants on the mechanical properties, flame–retardant properties, and electrical insulation properties of silicone cable coatings were investigated. The research results showed that the products obtained had good mechanical and electrical insulation properties, with tensile strength greater than 3.0 MPa, dielectric strength greater than 22 kV/mm, and volume resistivity higher than 6.5 × 1014 Ω·cm. When 30 parts of Mg(OH)2:MDP = 2:1 are added to 100 parts of resin, the flame–retardant performance of wire and cable materials can be significantly improved. Under the thermal radiation illumination of 50 kW/m2, the ignition time (TTI) of the Mg(OH)2/MDP coating increased by 16 s, and the maximum heat release rate (pkHRR) and total heat release rate (THR) decreased by 29.7% and 68.8%, respectively, compared with silicone rubber without flame retardant. The silicone rubber coatings prepared were flame retardant up to the FV–1 level.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings13050934