Low smoke non-halogen one-stage process silane naturally crosslinked polyolefin cable material and preparation method thereof
A polyolefin cable material and natural cross-linking technology, applied in the direction of insulating cables, cables, circuits, etc., can solve the problems of low temperature resistance of wire and cable, large material damage, and reduced electrical properties of materials, etc., to achieve reliable extrusion performance and cross-linking degree, improving physical properties, and reducing smoke generation
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Embodiment 1
[0036] Example 1: A low-smoke and halogen-free one-step silane naturally crosslinked polyolefin cable material and its preparation method
[0037] 1. Preparation of modified flame retardant:
[0038] Weigh 70 parts of magnesium hydroxide H-5 (Yabao), 70 parts of aluminum hydroxide OL-104LE (Yabao), and 5 parts of γ-aminopropyltriethoxysilane (KH-550) by weight, and weigh After measuring, add the flame retardant into the closed mixer, spray KH-550 to modify the surface of the flame retardant, and mix it at a high speed for 30 minutes at a temperature of 80°C, then release it. The obtained modified flame retardant agent.
[0039] 2. Preparation of flame retardant masterbatch:
[0040] Weigh 40 parts of linear low density polyethylene (DFDA 7042), 30 parts of polyethylene octene co-elastomer (Exxon 0230), 30 parts of ethylene-vinyl acetate copolymer (DuPont 265), modified flame retardant Mix 140 parts of the agent in a closed high-speed mixer, and then use an internal mixer to...
Embodiment 2 4
[0045] Embodiments 2-4: A low-smoke and halogen-free one-step silane naturally crosslinked polyolefin cable material and its preparation method
[0046] 1. The formula of flame retardant masterbatch is as follows:
[0047]
[0048] Embodiment two
[0049] 2. The formula of the catalyst masterbatch is as follows:
[0050]
[0051] Note: 1. Example 2: Catalyst: 50 parts of di-n-butyltin dilaurate, 50 parts of di-n-octyltin dilaurate; antioxidant: dilauryl thiodipropionate; metal deactivator N,N'- Bis[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine; Lubricant magnesium stearate.
[0052] 2. Example 2: catalyst: di-n-octyltin dilaurate; antioxidant: 10 parts of dilauryl thiodipropionate, 10 parts of tris[2,4-di-tert-butylphenyl] phosphite; metal Passivator N,N'-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine 5 parts, N-salicylamidophthalimide 2 parts; Lubricant magnesium stearate 10 parts, stearic acid 7 parts.
[0053] ...
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