Halogen-free flame retardant sheathing material for nuclear power 1e class k3 cables
A flame retardant sheath, nuclear power technology, applied in the field of flame retardant sheath materials for nuclear power cables, can solve the problems of thermal aging of cable sheath materials, unsatisfactory halogen-free flame retardant properties, poor mechanical properties, etc.
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Embodiment 1~4
[0028] Embodiments 1 to 4: A halogen-free flame-retardant sheathing material for nuclear power 1E class K3 cables. The halogen-free flame-retardant sheathing material for nuclear power 1E class K3 cables consists of the following components in parts by weight, as shown in Table 1 Shown:
[0029] Table 1
[0030]
[0031] Described graphene aqueous solution adopts the graphene aqueous solution that the concentration of Shanghai Xinchi Energy Technology Co., Ltd. is 1mg / ml;
[0032] The mass percentage of vinyl acetate (VA%) in the ethylene-vinyl acetate copolymer is 20-40%;
[0033] The compatibilizer is at least one of maleic anhydride grafted ethylene-vinyl acetate copolymer, maleic anhydride grafted ethylene-octene copolymer or maleic anhydride grafted polyethylene;
[0034] The ultraviolet absorber is 2-(2'-hydroxyl-3', 5'-di-t-pentylphenyl) benzotriazole, 2-(2'-hydroxyl-5'-tertoctylphenyl) benzene At least one of triazoles.
Embodiment 1
[0035] The inorganic flame retardant in embodiment 1 is magnesium hydroxide, the inorganic flame retardant in embodiment 2 is antimony trioxide, the inorganic flame retardant in embodiment 3 is magnesium hydroxide and antimony trioxide according to 1 : the mixture formed by 1, the inorganic flame retardant in embodiment 4 is nanometer montmorillonite.
[0036] The synergistic flame retardant in embodiment 1 is nano montmorillonite, the synergistic flame retardant in embodiment 2 is fumed silica, and the synergistic flame retardant in embodiment 3 is nano montmorillonite and gas phase The mixture formed in 1:1 in the method silica, the synergistic flame retardant in Example 4 is nano-montmorillonite.
[0037] The above antioxidants are tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 2-mercaptobenzimidazole zinc salt, 4,4'-thiobis (6-tert-butyl-3-methylphenol), at least one of dilauryl thiodipropionate.
[0038] The lubricant in Example 1 is p...
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